JPH0453703A - Wet type powder forming apparatus and wet type powder forming method - Google Patents

Abstract

PURPOSE:To positively and arbitrarily carry out a high speed, low speed, or stoppage operation, and therefore enable efficient work to be conducted by effecting forming through control of the actuation of a reciprocally movable upper forming block and a stationary lower forming block, and through detection of the phase of an electric servomotor and preliminarily determined program. CONSTITUTION:The elevation of an upper forming block and the elevation of a frame forming block are made through mechanical drive by a main shaft 46 that is rotationally driven from an electrical servomotor 32. By means of a phase detecting device 48 provided on the main shaft 46, the elevational positions of the upper forming block and frame forming block are detected and, by the elevational positions thereof, the speed of the servomotor 32 is controlled by a program. In this fashion, it becomes easy for rendering the stroke speed of the upper forming block and frame forming block at very high speed in the forming processes, and also rendering the stroke speed of the upper forming block and frame forming stroke at high speed in processes except forming. For example, it becomes possible to maintain pressure forces at an arbitrarily position in the forming cycles, or make speed changeable, thereby extremely reducing the overall cycles times.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a wet powder molding apparatus that compresses and dehydrates a powder material in the form of a slurry using a mold to form an electronic component molded product.

[Conventional technology]

In general, wet powder molding involves material filling during the molding process,
Processes such as removing the molded product and cleaning the mold are involved, and during dehydration molding of the material, depending on the molded product, pressure may be applied very slowly or the mold may be quickly compressed. is necessary.

In order to perform such operation control, conventionally the upper and lower molds were driven up and down using hydraulic pressure.1. A hydraulic molding device is used.

[Problem to be solved by the invention]

However, in such conventional hydraulic molding equipment, it is extremely difficult to speed up the operation due to a delay in the start-up time of hydraulic pressure generation and a time loss due to the responsiveness of the valve. It is also difficult to respond to subtle speed changes during the molding process, and it is not easy to set molding conditions.

The present invention solves the problems of the conventional ones, allows easy and reliable speed control, allows high-speed, ultra-low-speed, or stop operation to be performed arbitrarily and reliably, and is fast and efficient. An object of the present invention is to provide a wet powder molding device that can perform various operations.

[Means to solve the problem]

The present invention provides a wet powder molding apparatus that supplies and fills a powder material in the form of a slurry into a cavity formed by an upper mold, a lower mold, and a frame mold, and compresses and dehydrates the powder material to form a molded product.
a frame, an electric servo motor provided on the frame, a main shaft rotatably supported by the frame and rotationally driven by the servo motor, and a rotational phase of the main shaft that is directly or indirectly detected. A phase detection control B for controlling the servo motor, a lower mold fixing means for fixing the lower mold to the frame, and a lifting mold L, the upper mold being connected to the lower mold with respect to the frame. an upper mold frame supported so as to be movable in the direction of contact and separation between the molds; and an upper mold frame moving means mechanically driven by the main shaft to move the frame and the mold frame in the direction of contact and separation of the molds. ,
A wet powder molding apparatus comprising: a frame for holding the frame, and a frame for the frame held so as to be movable in the direction of contact and separation from the mold relative to the frame and the frame for the upper mold. and a wet powder compacting method using the apparatus.

[For production]

According to the present invention, the lifting and lowering of the upper mold and the frame are mechanically driven by the main shaft which is rotationally driven by an electric servo motor, and the lifting and lowering positions of the upper mold and the frame are determined by the phase detector provided on the main shaft. By detecting the servo motor speed and controlling the speed of the servo motor by program according to the vertical position, the stroke speed of the upper mold and frame mold can be set to extremely low speed in the molding process, and can be It is easy to make the stroke speed of the upper mold and frame mold high, and it is possible to select the optimal conditions for molding. For example, it is possible to maintain the pressing force at any position during the molding cycle, or to adjust the It is also possible to make it variable,
In addition, there is no oil pressure generation rise time or loss due to valve responsiveness as in the hydraulic type, and the overall cycle time can be significantly shortened.

In addition, in this specification, upper mold, lower mold, lifting and lowering, etc.
Although there is a description of a direction related to gravity, the present invention is not concerned with the direction of gravity, and the direction of the stroke in which the upper mold and the frame mold move toward and away from each other is not limited to the vertical direction, but can also be horizontal or inclined. shall be included in the present invention.

〔Example〕

Embodiments of the present invention will be described using the drawings.

1 and 2 show the entire wet powder molding apparatus.

2 is an upper mold, 4 is a lower mold, 6 is a frame mold, and the lower mold 4 and the frame mold 6
is incorporated into the die set 7 (see FIG. 5).

Reference numeral 8 denotes a frame that is the basis of the entire apparatus, and includes a servo motor 32, a main shaft 46, an upper die frame moving means 68, which will be described later.
A frame biasing means 81 for frame mold and a frame restraining means 1 (12) for frame mold are housed, and the upper mold frame 20 that holds the upper mold 2 and the frame mold 22 that holds the frame mold 6 can be raised and lowered. I support it.

Reference numeral 24 denotes an upper mold holder provided at the lower end of the upper ram part 26, which is upper mold holding means attached to the upper mold frame 20, and holds the upper mold 2. 28 is a T-shaped arm provided at the upper end of the frame 22;
Hold the inner frame mold 6 (FIG. 5).

Reference numeral 30 denotes a removal/cleaning device for removing the product and cleaning the mold.

Each part will be briefly explained with reference to FIGS. 3 and 4.

32 is an electric AC servo motor (DC may be used, but AC is preferable since it does not have brushes) provided on the frame 8, and includes a pulley 33, a heald 34, a pulley 37, and a combination air clutch brake. 36,
A main shaft 46 rotatably supported by the frame 8 is driven to rotate via a worm 38, a worm wheel 40, a pinion 42, and a gear 44. 48 is connected to the main shaft 46 and detects the rotational phase of the main shaft 46;
This rotary encoder serves as a phase detection controller that controls the servo motor 32 according to a program.

The upper mold frame 20 consists of an upper traverse 50, a lower traverse 52, and four main guide posts 54 connecting these. The mold frame 20 is held by the frame 8 so as to be movable in the mold contact/separation direction (vertical direction, vertical direction) in which the upper mold 2 and the lower mold 4 are brought into contact with and separated from each other.

The upper traverse 50 is provided with an upper ram 60 that is upper mold holding means and has an upper mold holder 58 for holding the upper mold 2 at its lower end.

The other end of the crank lever 64 that engages with an eccentric disk 62 provided on the main shaft 46 is connected to the lower traverse 5 by a pin 66.
2, and by rotation of the main shaft 46, the upper mold frame 20
The eccentric disk 62, the connecting rod 64, the bin 6
An upper die frame moving means 68 is formed by an eccentric crank mechanism with 6.

The upper mold 2 held in the upper mold holder 58 in this way is raised and lowered by the rotation of the main shaft 46, and the rotary encoder 48
The vertical stroke position of the upper mold 2 is detected based on the rotational phase of the main shaft 46 detected by the servo motor 32, and the speed of the servo motor 32 is controlled so that the upper mold 2 moves up and down at a programmed vertical speed according to the stroke position. It has become.

The rotary encoder 48 is not limited to the main shaft 46, and may be provided at a portion that rotates simultaneously with the main shaft 46 to indirectly detect the rotational phase of the main shaft 46. Also, the rotary encoder 48 may be used as a phase detection controller instead of the rotary encoder. The phase angle of the main shaft 46 may be indirectly detected by detecting the stroke of a portion that moves linearly (for example, the upper die frame 20, etc.) using a linear gauge.

69 is an air cylinder that applies an upward biasing force to balance its own weight.

67 is a belt tensioning bolt.

The frame 22 includes a die traverse sleeve 0, a lower ram 72 having a T-shaped ram 28 to which the frame 6 is attached, and two lower ram guide posts 7 that connect these.
4, a lower ram guide post 74 is guided by a bearing 76 for the frame 8, a bearing 78 of the lower traverse 52 for the upper mold frame 20, and a lower ram guide post 74 is guided by a bearing 78 of the lower traverse 52 for the frame 8 It is movable in the mold contact/separation direction (vertical direction) with respect to the mold frame 20.

The hydraulic cylinder 80 forms a biasing means 81 that biases the guide traverse 70 in a direction in which the frame mold 6 approaches the upper mold 2 (upward).

The main shaft 46 includes a knockout cam 82 for knocking out the molded product 1, a lower ram lifting prevention cam 84 that restrains the lower ram 72 from rising even after the upper mold 2 reaches the bottom dead center, and a hydraulic cylinder. Even if 80 is out of order, lower ram 7
A lower ram forced return cam 86 for forcibly raising the lower ram 2 is provided.

Corresponding to the knockout cam 82, a knockout cam follower 88 is swingably provided on a lever plate 90 pivotally connected to the guide traverse 70 and biased in one direction by a spring 92. The stopper 94 that adjusts the non-knockout amount is connected to the knockout amount adjustment mechanism 96 (
The amount of descent of the die traverse sleeve 0 is adjusted by adjusting the amount of descent of the die traverse sleeve 0, and the amount of non-knockout is adjusted by vertical adjustment using a dial, bevel gear, shaft, gear, screw shaft, etc.

Corresponding to the lower ram lifting prevention cam 84, a lower ram lifting prevention roller 98 is provided on the guide traverse 70 to prevent the lower ram 72 from lifting up.

Gui traverse 70 corresponding to lower ram forced return cam 86
A plate 100 is provided for the receiver. When the hydraulic cylinder 80 is operating normally, a gap 102 (about 1 inch) is left even when the upper die 2 reaches the bottom dead center.

These cams and corresponding followers provide a restraining means 1 (12) for restraining the frame 22 in a predetermined position.
) is formed.

Note that the push ring 104 on the lower surface of the lower traverse 52 is
When the upper die 2 reaches the bottom dead center, a gap 1106 (2
(degree).

Reference numeral 108 denotes a water drainage sheet for guiding water squeezed out during compression molding to the outside, and is composed of a raw water drainage medium and an auxiliary water drainage medium. Reference numeral 110 is a feed-out roller, and 112 is a take-up roller, which are relatively fixed to the upper mold holder 58 (FIG. 5A).

The take-out/cleaning device 30 includes a guide rail 114, a take-out head 11B and a cleaning head 120 that reciprocate on the guide rail 114 by being driven by an electric servo motor 116.

122 is an operation box.

In FIG. 4, the part of the guisent 7, which is a mold holding device that holds the lower mold 4 and the frame mold 6, is shown schematically to avoid complexity, but its details are shown in FIG. 5A.

A lower mold mounting plate 124 is provided as a lower mold fixing portion that is removably engaged with and fixed to the frame 12. The lower mold 4 is fixed to the lower mold mounting plate 124 via a lower mold fixing plate 126.

The frame 6 is attached to the T-shaped ram 28 of the lower ram 72 via a lower mounting plate 128, a guide post 130, and a lower mounting plate 132.

The lower mold mounting plate 124 is provided with a linear slide bearing 134 that slides and guides the guide post 13o in the vertical direction.
The frame mold 6 is supported via a guide post 130 so as to be movable in the vertical direction.

136 indicates a molded product.

A communication hole 140 and a communication groove 142 are provided inside the frame mold 6 to supply slurry-like powder raw material to the cavity through the supply pipe 138.

The upper end of the communication groove 142 communicates with the cavity at the beginning of molding, but as molding progresses and the frame mold 6 descends and the cavity contracts, the upper end of the communication groove 142 becomes cut off from the cavity as shown in FIG. 5A.

FIG. 5B shows a method for forming a plurality of small-sized molded articles.
FIG. 5C shows the guisent 7 when molded using a frame 6 having a plurality of cavities 3 as shown in FIG. 5D.

The details of each part will be explained below.

Figures 6, 7, and 8 show the servo motor 32 and the main shaft 46.
and details of the lower half of the upper die frame 20.

207 is a combination air clutch brake 36
210 is an accumulator, 240 is an air hose, and 243 is a dual valve.

228 is the column base, 229 is the column, 231 is the upper guide bearing, 241.242 is the main guide post 54
222 is a boss for attaching an eccentric disk, and 245 is a friction clamper.

FIG. 9 is a detailed view of the upper part of the upper mold frame 20 and the vicinity of the upper ram 60.

On the upper traverse 50 attached to the upper end of the main guide post 54 by a nut 332, a worm wheel 3]5 having a threaded portion 344 on its inner diameter is rotatably supported by a metal member 337, 343 around a vertical axis. . The worm wheel 315 is rotated by a motor 329 for column position adjustment via gears 338 and 339, a worm 341, a worm wheel 345 of the second stage shaft 342, and the worm 328.

A threaded cylinder 316 is mounted inside the worm wheel 3/5. The threaded cylinder 316 is assembled integrally with the joint flange 324 and the cylinder 317. Threaded tube 316
A cylinder 313 is held inside so as to be slidable in the axial direction.

When the motor 329 is rotated, the worm wheel 315
rotates, and due to the action of the threaded portion 344, the threaded cylinder 316,
The joint flange 324 and the cylinder 317 are guided by the cylinder guide 31B to move up and down, and their heights are adjusted.

The cylinder 313 is mounted so that it can be moved up and down using the flange 307 as a guide.

A piston rod 323 is held by the joint flange 324 so as to be slidable in the axial direction. piston rod 323
A hydraulic piston 320 is attached to the upper end of the cylinder 3.
A hydraulic chamber 334 is formed in the hydraulic cylinder 17 to constitute a hydraulic cylinder mechanism. An air piston 326 is attached to the lower end of the piston rod 323, and the air chamber formed by the cylinder 313 and the cylinder head 325 is divided into upper and lower parts to form an upper air chamber 335 and a lower air chamber 336, and a pneumatic cylinder mechanism is formed. It consists of

A rond presser 312 is attached to the lower part of the cylinder 313, and a loft 322 is inserted therein. A load cell 306 is installed at the upper end of the rod 322 and is fixed in the vertical direction by spacers 333 and 314.

An upper mold holder 58 is attached to the lower end of the rod 322 via a flange 311. 310 is a rotation prevention guide provided on the upper mold holder 58, and 308 is a rotation prevention rod. Reference numeral 319 is a rotation prevention bar for the threaded cylinder 316.

In the hydraulic chamber 334, the pressure oil from the hydraulic unit 302 is supplied through a balancing valve 301, which is a pressure control valve, and a pipe 304.
are guided through. 3 (12) is an oil pressure gauge. The balancing valve 301 can act as a hydraulic pump, making it possible to prevent overload or perform constant density molding.

Air passages (not shown) are connected to the upper air chamber 335 and the lower air chamber 336, respectively, and connect the supply and exhaust of compressed air from a compressed air source (not shown) to the air piston 326. cylinder 13, upper mold holder 5
8 can be relatively raised and lowered. This air operation allows the molded product to be held down by the upper die 2 even when the upper traverse 50 rises during non-knockout.

Figures 1O and 11 show the lower ram 72 and the guide traverse 70.
The drive mechanism, urging means 81, and restraining means 1 (12) are shown.

405 is a guide frame, and 406 is a slide block, which is guided by a guide shaft 407 and causes the guide traverse 70 to slide in the vertical direction.

438 is a screw shaft for vertically moving the stopper 94 for adjusting the knockout amount, and the knockout amount adjustment mechanism 96
(FIG. 3), the gear 442 is rotated and operated.

A reducing valve 401 with electromagnetic proportional relief is connected to the hydraulic cylinder 80 of the urging means 81 from a hydraulic source 402.
Pressure oil is introduced through piping 443, and during compression molding, the frame 6 is pressed against the upper mold 2 by a biasing force (upward supporting force) to prevent material from leaking from the contact surface between the upper mold 2 and the frame 6. It is necessary to press against it. As the compression molding process progresses, the moisture content of the material decreases, so the bearing force required to prevent material leakage can also be reduced, and the apparent pressing force of the upper die, which is the sum of this bearing force and the reaction force from the material, can be reduced. In order to minimize the force required, it is preferable to reduce the biasing force according to the molding stroke.

For this purpose, the reducing valve 401 with electromagnetic proportional relief is controlled by a program to change the urging force, and the upward supporting force of the frame 6 is changed in accordance with the molding stroke during the compression molding process.

The net pressing force and biasing force will be explained with reference to FIG. 10A.

The frame mold 6 is held at a predetermined height by a stopper while an upward supporting force (biasing force) is applied to the frame mold 6 by a hydraulic cylinder 80. Since the lowering upper die 2 is in a free state, no force acts on it, but when it comes into contact with the frame die 6, it receives a reaction force from the frame die 6 that is equal to its supporting force.

Thereafter, as the material is compressed, the reaction force from the material (ie, the net applied force compressing the material) increases.

On the other hand, the supporting force of the frame 6 is controlled by the set value of the reducing valve 401 with electromagnetic relief according to the program.
1-, it gradually decreases according to a predetermined pattern necessary to prevent material leakage.

Therefore, the sum of the support force of the frame mold 6 and the net pressing force compressing the material acts on the upper mold 2 as an apparent force, and the hydraulic chamber 334 at the top of the upper ram has an apparent force corresponding to this apparent force. Hydraulic pressure is generated.

When this hydraulic pressure reaches the pressure set by the balancing valve 301, the apparent force of the upper mold 2 reaches its upper limit and becomes constant, but the supporting force of the frame mold 6 gradually decreases, so the net force that compresses the material is The pressure increases gradually. When the supporting force of the frame 6 becomes zero, the net pressurizing force becomes maximum, and if the servo motor 32 is stopped at this time, the pressurizing force is maintained at a constant pressure ((d in Fig. 18 (i i l)). ) can be done.

The bearing force of the frame mold 6 can be changed in any pattern according to the program to obtain the net pressing force and leakage prevention bearing force suitable for forming, and for this reason, the forming force of the upper ram is not excessively applied during the compression process. It can be transmitted to the molded product continuously and without waste.

4 (12) is an oil pressure gauge.

Reference numeral 417 denotes a filling depth adjustment screw shaft for the filling material, which is rotated by operating a gear 425 via a known shaft and gear (not shown) using an adjustment handle 426 to adjust the filling depth, which is threaded on the inner diameter. The height of a stopper 419 provided at the lower end is adjusted by moving the adjustment cylinder 418 (the lowest position is limited by an adjustment end piece 424 provided at the lower end of the 11-section screw shaft) up and down. .

When the frame 6 rises and the backing plate 421 of the guide traverse 70 hits the stopper 419, the frame 6 moves to the position shown in FIG. 18 (11).
It stops at that height as shown in fal.

The amount of material to be filled is roughly determined by the difference between the height of the top surface of the frame mold 6 and the height of the top surface of the lower mold 4, so the amount of material to be filled can be adjusted by adjusting the height of the stopper 419. can do.

12 and 13 show the lower ram 72 and the height adjustment mechanism of the T-shaped ram 28.

A nut 5 (12) is attached to the upper end of the lower ram guide post 74.
A base plate 502 is attached by. A worm wheel 509 having a threaded portion 522 on its inner diameter is rotatably supported on the base plate 502 around a vertical axis. The worm wheel 509 is rotated by a worm 507 rotated by a handle 511, and its height is adjusted by raising or lowering the T-shaped ram 28, which is screwed into a threaded portion 522 by a screw at the lower end.

514 is a nut that is screwed into the outer screw at the lower end of the worm wheel 509, 513 is a spacer, 515 is an adjustment end piece, 5
0B is a casing, and 506 is a lock lever.

Reference numeral 516 is an arm fixed to the T-shaped ram 28, and the tip of a rond 517 attached to the arm 16 is brought into contact with a digital scale 520 provided on a plastic lift 521 fixed to the lower ram guide post 74, and the worm wheel 509 The amount of adjustment of the height of the T-shaped ram 28 by raising and lowering is displayed.

(margins below c) Figures 14, 15, 16, and 17 are for removal and
The cleaning device is shown.

Two rail supports 640 are provided horizontally in parallel on both sides of the frame mold 6 with the upper mold 2, and are fixed to the column base 228 (FIG. 6) by a support member 631 and front joint plates 632, 633. There is. Guide rails 627 are provided above and below the rail support 640, respectively. 637 is a dust cover.

A take-out unit 641 and a cleaning unit 642 are placed on the guide rail 627 so that they can travel independently.

The take-out unit 641 includes a drive slider 606 and a driven slider 605, each having a guide wheel 643 and a spring 626. It is designed to reciprocate along a rail 627.

The cleaning unit 643 includes a driving slider 6 (12) having a guide wheel 623, a driven slider 604,
A cleaning side drive servo motor 617 causes the cleaning device to reciprocate along a guide rail 627 via a worm reducer 615, a drive sprocket 613, a chain 610, and a chain droplet 07.

In the take-out unit 41, the drive slider 606
, a suction section 644 and a vacuum generation section 645 are disposed on a mounting plate 602 provided with a driven slider 605.

In the adsorption section 644, a support plate 649 is moved up and down by a cylinder 648 along a guide post 647 provided on a plastic lift 646.

A plurality of suction nozzles 650 are provided on the support plate 649, and are configured to suction the molded product that has been molded by vacuum suction.

The vacuum generating section 645 is equipped with a plurality of ejectors 651, each of which is connected to a suction nozzle 650 through a tube (not shown).
It reaches this point and performs an adsorption action.

In the cleaning unit 642, the drive slider 6 (12
), a mounting plate 601 having a driven slider 604,
A cleaning brush 6.53 is provided to be reciprocated along a guide bar 654 by a reciprocating drive mechanism 655 in a direction perpendicular to the running direction of the cleaning unit 642.

As the reciprocating drive mechanism 655, a mechanism using a crank motion as described later, a mechanism using the operation of a reciprocating cylinder, etc. are used. 656 is an air blow nozzle,
657 is a water nozzle that spouts air and water during mold cleaning.

658 is a cleaning tab filled with water for cleaning the cleaning brush 653, and is raised and lowered by a cylinder 659.

In the above embodiments, the upper ram drive section is provided at the bottom of the molding device, but it may also be provided at the top.

The operation will be explained.

First, the molding operation will be explained.

FIG. 18(i) is a process diagram showing the molding operations of the upper mold 2, lower mold 4, and frame mold 6 in a molding operation for one molded product, where 3 is a cavity, and 5 is a slurry powder. It is a raw material.

FIG. 18(ii) shows the movement of the upper mold 2 and the frame mold 6.

FIG. 18(iii) shows the process.

FIG. 18(iv) shows the speed state of the servo motor 32 for driving the press.

FIG. 19 is a process diagram showing the movement of each cam of the restraining means 1 (12), (A), CB), and (C) of the same figure.

The time point (D) is (A) and (B) in Figure 18.

This corresponds to time points (C) and CD), respectively.

FIG. 19(1) shows the operation of the lower ram forced return cam 86.

FIG. 19 (II) shows the operation of the lower ram lifting prevention cam 84.

FIG. 19 (![) shows the operation of the knockout cam 82.

Throughout these steps, control elements such as the stroke, speed, and oil pressure of each part are controlled via the low-return encoder 48 according to a predetermined program.

The steps will be explained in order.

fat Upper mold lowering/frame return The lower mold 4 is fixed throughout the entire process and its height does not change.The upper mold 2 starts to descend at high speed from a position slightly lower than the top dead center. The frame mold 6 is restrained by the shape of the knockout cam 82 from a position at the same height as the lower mold 4, and gradually rises due to the urging force of the hydraulic cylinder 8°, and the backing plate 421 of the guide lever 70 comes into contact with the stopper 419. It returns to a predetermined height position and stops. The state in which the upper mold 2 further descends and contacts the frame mold 6 and the cavity 3 is formed is the 18th state.
This is fat in figure (i). The upper mold 2 is further lowered and stopped. The frame mold 6 follows the movement of the upper mold 2.

If the biasing hydraulic cylinder 8o operates normally, the frame 6 will return to its normal position as described above, but if the hydraulic cylinder 8o is malfunctioning, the frame 6 will remain at the lowest position. The upper surface of the frame mold 6 is located at a lower position than the upper surface of the lower mold 4. In this state, when the upper mold 2 descends in the next stroke, it collides with the lower mold 4 and damages the mold surface. In order to prevent this, as shown in FIG. Collision is avoided by returning the mold to a position where it protrudes beyond the upper surface of the lower mold 4. In this state, the equipment is stopped and the hydraulic cylinder is repaired.

(b) A slurry material is injected into the material filling cavity 3 through the material filling groove 142 to fill it.

(C1 pressure dehydration The upper die 2 is lowered at an extremely low speed to dehydrate the material under pressure.

Moisture is drained to the outside through a drainage sheet 108 consisting of a raw water drainage medium and an auxiliary water drainage medium.

At this time, as described above, the upward urging force of the hydraulic cylinder 80 is controlled by the electromagnetic proportional relief reducing valve 401 to adjust the supporting force between the upper mold 2 and the frame mold 6.

During this process period, Fig. 19 (1) (II) ([1
As shown in CB), the lower ram forced return cam 86, the lower ram lifting prevention cam 84, and the knockout cam 82 are not in contact with the cam follower and do not function.

+d+ When the pressure-holding upper die 2 reaches the bottom dead center, it is stopped, and a predetermined time is allowed to pass while the net pressure force at that time is maintained. In order to avoid interference at this time, a gap 102 (about In) is left between the lower ram forced return cam 86 and the plate 100, as shown in FIG. 19(1)(C).

In this state, in order to prevent the guide traverse 70 from returning upward due to residual pressure in the hydraulic cylinder 80, etc.
As shown in FIG. 19 (C), the lower ram lifting prevention roller 98 is pressed down by the lower ram lifting prevention cam 84.

tel To take out the knockout molded product, the frame mold 6 is lowered and the upper mold is raised to expose the molded product.

In order to lower the frame mold 6, see (D) in Fig. 19 ([1)].
As shown in the figure, the knockout cam 82 comes into contact with the knockout cam follower 88 and lowers the guide traverse 70 by a knockout amount of 99.

The upper mold 2 rises at a high speed and reaches the state shown in (eo) in FIG. When the upper surface of the molded product 1 is released by raising the molded product 1, the center portion bulges out due to springback while the periphery is restrained, and there is a risk that the molded product 1 will crack and be damaged. In order to prevent this, as shown in FIG. 9, an air piston 326 is provided on the upper ram 60 and air is supplied to the lower air chamber 336. Due to the air action, the upper traverse 50 rises, but the upper mold 2 remains as it is and still presses the upper surface of the molded product 1, and the frame mold 6 is sufficiently lowered so that the outer periphery of the molded product 1 is not constrained as shown in FIG. 18(i) (e). so that it rises at high speed.

ffl Taking out After the upper mold 2 has risen sufficiently, the molded product 1 is taken out as described later by the taking out unit 641 shown in FIGS. 14 to 16.

tg+ Mold cleaning After that, cleaning unit 6 shown in Fig. 14.15.17
42, the lower mold 4 and frame mold 6 are cleaned as described later.

Wet molding work is performed by repeating the above steps.

Next, the operation of each part will be explained.

First, the driving operation of the upper mold frame 20 will be explained mainly with reference to FIG. 6.7.8.

The rotation of the press drive servo motor 32 is controlled by Boo 1J3 according to the contents of the pre-programmed operation program.
3. Turn the boolean IJ-37 which is connected to the belt 34 and the combination air clutch brake 36.

In order to reduce pressure fluctuations from the air source, the air stored in the air accumulator 210 is supplied to the clutch shaft through the air hose 240 by switching the dual valve 243 and through the rotary seal 207, and the air pressure releases the brake. The clutch operates and the clutch shaft rotates.

When this rotation is transmitted to the hollow shaft type worm reducer consisting of the worm 38 and the worm wheel 40 via the shaft coupling, the pinion shaft 42 inserted into the hollow shaft on the output side of the reducer and secured with a key rotates. The friction type clamper 24 is transmitted to the main gear 44 that meshes with the binion 42.
5 to rotate the main shaft 46.

This main shaft 46 is supported by side bosses from the left and right sides of the frame 8, and the central part is supported by two main shaft supports.

There are eccentric discs 62 on the left and right between the side bosses and the main shaft support, which are positioned and bolted to the eccentric disc mounting boss 222 and the main gear 44.
5 to the main shaft 46.

Further, a knockout cam 82 for driving the lower ram portion 72 and the like are fixed to the main shaft 46 between two main shaft supports by a friction type clamper 245 on a cam plate boss integrated with the lower ram forced return cam 86.

This rotation of the main shaft 46 causes the eccentric disk 62 to eccentrically move, causing the lower traverse 52 to move linearly in the vertical direction via the left and right connecting rods 64 and the connecting pin 66. (Crank/slider mechanism) The lower traverse 52 has main guide bosses 54 (4 pieces)
is fixed with a spacer 242 and a nut 241, and is guided by a lower guide bearing 76 and an upper guide bearing 231, and vertical linear motion is directly transmitted to the upper traverse 50, which is attached to the upper part of the guide posts 54 (4 pieces). be done.

In this embodiment, the rotation angle (crank angle) (phase angle) of the main shaft 46 is detected by a rotary encoder 48 via a coupling to detect the position of the press machine necessary for control (for example, detect the position of the upper die frame 20). It is done by doing.

In addition, balancer air cylinders 69 are connected to the left and right sides of the lower traverse 52, and by balancing the weight in the vertical direction, high-speed operation of the press is supported.

By turning the belt tensioning bolt 67, the press drive servo motor 32 is moved upward and the belt 3 is tightened.
This is for adjusting the tension in step 4.

Next, the upper part of the upper die frame 20 and the upper ram part 60 will be explained mainly with reference to FIG. 9.

When the upper mold 2 mounted on the upper mold holder 58 receives a pressing force from below, the force is applied to the upper mold holder 58, the cylinder 311, the rod 322, the load cell 306, and the spacer 3.
14, the cylinder 313, the cylinder hood 325, the piston loft 323, and the hydraulic piston 320 in this order, and is transmitted to the cylinder 317 via the hydraulic oil supplied from the hydraulic unit 302 via the balancing valve 301 and the hydraulic piping 304.

This cylinder 317 is bolted to a threaded cylinder 316 with a joint flange 324 in between, and a threaded worm wheel 315 that engages with the metal 337
It is finally transmitted to the upper traverse 50 via.

The upper traverse 50 is connected to the upper ram drive section through a guide post 54 and a nut 332.

The functions and operations of hydraulic cushions will be explained.

The hydraulic piston 320 of the hydraulic cushion is constantly connected to the joint flange 324 at the set pressure of the balancing valve 301.
However, the following functions are performed in relation to the pressing force transmitted from the upper die holder 58.

b) Overload prevention function If the setting pressure of the balancing valve 301 is set to a value greater than the molding pressure or such that it is dangerous to apply more pressure, the hydraulic pressure will be high if molding is performed near the molding pressure. Therefore, the hydraulic cushion does not operate, but if there is an abnormal filling of material or if a foreign object is caught in the mold, the pressurizing force will suddenly increase, and the pressurizing force will become larger than the set pressure, and the hydraulic piston 320 will not operate at the set pressure. While maintaining balance, the hydraulic oil is drained from the balancing valve 301 (in other words, the upper ram moves upward so that the pressure does not exceed the set pressure).

At this time, the amount of movement is detected, and if it exceeds the dangerous range, the press will come to an emergency stop.

In a mechanical press with constant density forming function, the amount of movement of the upper ram is determined mechanically, and the repeatability and reproducibility of setting conditions are reflected in the dimensional stability of ready-to-form products. However, this has nothing to do with the variation in the filling of the material, so if the variation in the filling of the material cannot be ignored, even though the molding dimensions are the same, the density of the molding varies greatly, causing warping of the fired product during firing, which becomes a big problem.

In powder molding, it is a golden rule to suppress variations in material filling as much as possible, but this may be difficult depending on the material. The principle is the same as described in (a)) If a pressure higher than the set pressure is applied, the upper ram will move upwards and prevent the pressure higher than the set pressure from being applied to the molded product, so the molding dimensions will vary, but the molding density will be uniform. In this embodiment, such constant-density molding is possible even though it is a mechanical press.

Next, the function and operation of the air cushion will be explained.

When the mechanical press passes the bottom dead center and starts knocking out the molded product, depending on the molded product, the frame mold must be lowered to perform non-quauding while the molded product is being held down by the upper and lower dies.
Spring banks may cause cranks or cracks in the molded product.

However, since the upper ram mechanically moves upward after passing the bottom dead center, the upper mold cannot hold the molded product in place during knockout.

For this reason, an air cylinder silane was installed inside the upper ram as a mechanism to hold down the molded product regardless of the operation of the upper ram.

To explain its operation, if air is supplied to the lower air chamber 336 before the upper ram passes the bottom dead center, it will not appear as an actual operation while the upper mold is being held down by the force of the upper ram, but the lower When the upper ram begins to pass the dead center, the upper ram moves upward, so the cylinder 313 moves downward using the mounting flange 307 as a guide (the air piston 32
6 is connected to the hydraulic piston 320 by a piston rod 323, so it does not move unless the hydraulic piston 320 moves). 2 also moves downward and presses the molded product instead of the upper ram.

The pressing force is determined by the amount of air pressure supplied.

Next, when the knockout is finished, there is no need to hold down the core, so when the air is switched and air is supplied to the upper air chamber 335, the cylinder 313 moves upward and the upper mold returns to its original position. .

Next, the function and operation of ram position ff1il will be explained.

When setting the mold, it is necessary to attach the upper mold 2 to the upper mold holder 58 and adjust its vertical position, but since the upper ram is located considerably above the operator, an electric adjustment is required that can be activated by pressing a button. A mechanism was established.

To explain its operation, the upper ram position adjustment motor 3
29 is rotated, the rotation is transmitted to the small gear 338, large gear 339, and worm 341, and the worm wheel 34 is fixed with a key to the second stage shaft 342 that meshes with the small gear 338, large gear 339, and worm 341.
5, the screw is transmitted to the worm wheel 328 which is also fixed with a key on the same axis, and finally the screw rotates the worm wheel 315 at a considerably reduced rotational speed.

This threaded worm wheel 315 is metal 337.3
43 so that there is no play, and is rotatably mounted in the upper traverse 50 by a mounting flange 307.

As this rotates, the screw fiJ316 that engages with this moves in the vertical direction, and finally the upper mold holder 5 uses the upper traverse 50 as a reference base for operation.
8 moves vertically to adjust the position of the upper ram.

The upper ram position adjustment motor 3 is used to select the vertical movement direction.
This is done by switching the rotation direction at 29.

Further, the rotation stopper bar 319 is used to prevent the screw cylinder 316 from turning.

In other words, the molding pressure is detected and displayed by the load cell 306.

Further, the spacer 333 is a washer for adjustment when applying a preload to the load cell 306 with the rond presser 312 to center it. Note that the rond presser 312 also serves as a guide for the rod 322.

The anti-rotation rod 308 and the anti-rotation guide 310 are used to prevent the upper mold holder 58 from rotating.

Cylinder guide 31B is a guide for cylinder 317.

Next, the 14th section describes the functions and operations of the removal/cleaning device 30.
This will be explained with reference to Figures 17 to 17.

First, we will explain the process of taking out the completed molded product.

When the molding is completed, the upper mold 2 has been raised together with the water draining sheet 108, as shown in FIG. However, the molded product 1 remains placed on the lower mold 4.

Here, the take-out side drive servo motor 618 is activated to make the take-out unit 641 run along the guide rail 27, the suction part 644 is positioned directly above the frame 6, and the suction nozzle 650 is lowered by the cylinder 648. Bring it into contact with the molded product l.

After that, air is supplied from the air supply pipe 652, and the ejector 6
The molded product 1 is attracted to the suction nozzle 650 by the vacuum generated by the ejector effect of the molded article 1 .

Next, the molded product l is raised by the cylinder 648, and the take-out unit 641 is moved to return it to the initial standby position.
is deployed, the vacuum is released and the suction nozzle 650
The molded product 1 released from the molded product 1 is received and transported to the next process.

Next, in this example to explain the cleaning work,
Since the upper mold 2 is always covered with the drainage sheet 108 and does not get dirty, only the lower mold 4 and the frame mold 6 need to be cleaned.

During cleaning, after the molded product 1 is taken out by the take-out unit 641 as described above, the cleaning side drive servo motor 617
Activate the cleaning unit 642 and move it to the guide rail 27.
along the frame 6 gradually from one end to the other end. At this time, the reciprocating drive mechanism 655 causes the cleaning brush 653 to reciprocate in the direction perpendicular to the running direction of the cleaning unit 642, and at the same time air and water are ejected from the air blow nozzle 656 and the water nozzle 657 to lower the mold. 4 and the frame mold 6 are cleaned.

After cleaning the frame mold 6 and the lower mold 4 by reciprocating the cleaning unit 642 once or as many times as necessary, the cleaning unit gutter 642 is returned to its original standby position.

When the cleaning brush 653 becomes dirty, the cleaning tab 658 is raised by the cylinder 659 in the standby position to clean the cleaning brush 653.

Next, important points of each part in this embodiment will be shown.

f5AI (Frame drive unit for upper die) (see Figure 6-7.8) Figures 6 to 8 show the mechanism that uses the rotation of the drive servo motor to generate linear motion in the upper ram using the crank slider mechanism. The machine shown here has four guide posts, and is equipped with a balance air cylinder to support high-speed operation.

Important points are: i) This machine does not use the flywheel that is always included in ordinary mechanical presses.

(If this is used, the press cannot be controlled.) ii) Normal mechanical presses do not control the number of rotations of the drive motor during one process to vary the press speed, but this machine does not A servo motor (in this machine, an AC servo motor) is used as the motor, and a rotary encoder (same as a linear gauge) is used to detect the position for control.The speed can be varied during one process, and the pressing force can be maintained. This allows you to freely stop at any point.

ii) Figure 2 shows an example where the upper ram drive unit is installed below the machine, but if it is a normal mechanical press (one that has a mechanism that converts the rotary motion of the motor into linear motion), its contents would be This idea can be applied to anything.

Retirement Emperor (see Figure 9) Figure 9 shows the internal structure of the upper ram driven by the upper ram drive section. The main functions include electric position adjustment of the upper ram, air traction for knockout,
It also has all the functions of a hydraulic cushion.

The important points are: i) The hydraulic cushion of a mechanical press that usually has a hydraulic cushion uses a hydraulic accumulator or the like to form a closed hydraulic circuit inside the upper ram.
With this method, there was a problem that when pressurized due to air entering the circuit or shrinkage of hydraulic oil, the upper ram would start moving before the set pressure was achieved. This machine is equipped with a balancing pulp in the hydraulic circuit of the hydraulic cushion, and by constantly applying a set pressure from the hydraulic unit, the hydraulic cushion has an overload prevention function, and even though it is a mechanical press, it has the same constant pressure as a hydraulic press. It has also become possible to realize density molding functions.

Royal Press (Refer to Figure 10.11) Figure 10.11 shows the mechanism for generating the lower ram operation, which is a basic operation in addition to the upper ram operation of a mechanical press. The lower ram is operated by a plate cam attached to the main shaft of the crank slider mechanism that drives the upper ram and two lower ram support hydraulic cylinders.

The important points are: I) In conventional mechanical presses where the lower ram support is hydraulically operated, the support pressure can be smoothly changed by adjusting the combination and timing of pulp ON-OFF switching. However, even in this case, a hydraulic shock inevitably occurs, which is not satisfactory considering the effect on the molded product.

In this machine, by using a reducing pulp with proportional relief, the lower ram support force can be varied in any pattern by program as the pressurizing operation progresses. Therefore, the forming force of the upper ram could be continuously and smoothly transmitted to the molded product without waste.

ij) In a normal mechanical press, the knockout process ends long before the upper ram reaches the top dead center, and if left as is, the space (frontage) into which a cleaning device can enter would be very narrow, making it impractical.

For this reason, in this machine, the cam curve of the knockout cam is changed so that the knockout state is maintained until the upper ram reaches near the top dead center, so that the take-out cleaning device can fit in with plenty of space. I did it like that.

Royal plate (see Figure 12.13) Figure 12.13 shows the internal structure of the lower ram driven by the lower ram drive section.

It has a lower ram position adjustment function that can be operated using the handle.

This figure also shows an example of how to install a scale for measuring the amount of adjustment.

The important points are:) In most conventional mechanical presses, the lower ram position adjustment method involves turning a ring-shaped nut with a spanner or rod and locking it, but this is very inefficient and difficult to adjust. It was inconvenient to set mold conditions because it was difficult to know how much was being produced.

This machine incorporates a worm deceleration mechanism at the position adjustment point of the lower ram, allowing adjustment and locking with a handle from the front of the press via the worm shaft. Additionally, this adjustment amount can be measured on a scale.

ii) In most conventional mechanical presses, the amount of adjustment is measured and displayed by counting the number of rotations of the adjustment spindle with a gear-type counter and displaying the converted value. , it cannot be a net adjustment amount because it ignores the influence of bank crash.

In this machine, as shown in FIG. 5 as an example, the amount of movement at the final point to be adjusted is directly measured using a scale, so that the net adjustment 31 can be grasped.

(See Figures 14, 15, 16 and 17) Figures 14 to 17 show the structure of the running section of the take-out and cleaning device installed in this mechanical press. It meets the demand for high-speed operation under the harsh working environment of wet molding sites.

The important points are: ) The driving part of this traveling part is also composed of a servo motor (AC servo motor in this machine), so that high-speed and optimal movement patterns can be freely programmed according to the molded product.

+1) The running rail is a V-shaped rail that is placed on both sides and used for both the take-out device and the cleaning device. Further, the V-shaped guide wheel below the slider used in these is pressed against the rail by a spring to prevent rattling or galling due to rail wear or adhesion of foreign matter.

111) The cover of the running section has a structure that provides almost complete protection from water and dust from above.

Wet type g-cent (see Figs. 5A and 5B) Figs. 5A and 5B show an example in which the frame mold 6 and the lower mold 4 are made into a g-cent for mechanical press use.

The important points are: 1) By temporarily attaching the frame mold and lower mold fixing plate of the wet mold used in the hydraulic press to the Guicent frame mounting plate and lower mold mounting plate respectively, the wet mold can be easily converted to Guicent. .

ij) Until now, wet molding has not been performed using a mechanical press, so the formation of wet molds into gussets has not been seen in the past.

Next, the effects of the above embodiment will be explained.

1) Reduction of molding costs 2) Processes other than molding conditions can be mechanically sped up, and the overall cycle time is significantly shortened because there is no loss in hydraulic pressure generation start-up time or pulp responsiveness found in hydraulic presses. can.

(Note) The operation of stopping while maintaining the pressurizing force at any position during the molding cycle or varying the speed by controlling the servo motor that is the drive source of the mechanical press (direct motor drive system without flywheel) can be programmed, allowing for free molding patterns depending on the molded product.

In addition, these data can be saved for each molded product on an IC card or the like, so no skill is required to set the molding conditions, and setup time can be increased (shortened).

c) By using servo motors for the traveling drive parts of the molded product take-out device and mold cleaning device, which are peripheral devices of this mechanical press, high speed and optimal movement patterns can be freely programmed according to the molded product. This not only shortens the molding cycle time due to the increased speed of the cleaning device, but also shortens the setup time.

2) Improving the quality of molded products a) By adopting a mechanical press method for wet powder molding, the repeatability and reproducibility of setting conditions of a mechanical press are superior to those of a hydraulic press, resulting in dimensional stability. This leads to improvements in quality such as performance.

(Example) This mechanical press uses the withtroal method as a forming method, and the lower ram support is hydraulically operated.
This hydraulic control uses a reducing pulp with an electromagnetic proportional relief so that the hydraulic pressure can be varied in any pattern by programming each time the pressurizing operation progresses, so the forming force of the upper ram can be continuously and smoothly. It can be transferred to the molded product without waste.

C) A hydraulic cushion is installed inside the upper ram, which is constantly receiving the set pressure from the hydraulic unit through a balancing valve, and is used as an overload prevention function.If the pressure is set so that the set pressure equals the molding pressure, the machine Even though it is a press, if a force higher than the molding pressure is applied to the molded product, the oil in the hydraulic press will be relieved and no more pressure will be applied than the set pressure, so it is possible to perform constant density molding like a hydraulic press.

3) Improved operability and handling a) As is common in dry-type mechanical presses for powder, the wet-type mold is also made into a gusset like the dry-type mold, making handling and maintenance easier.

Mouth) When removing the molded product from wet powder molding, cleaning the mold is
This is done with the press stopped at the knockout position, but
In a normal dry powder mechanical press, the knockout ends long before the upper ram reaches the top dead center, and if it continues as it is, the space into which the take-out and cleaning device can fit becomes very narrow, making it impractical.

Therefore, by changing the knockout cam curve so that the knockout state is maintained until the upper ram reaches near top dead center, the take-out cleaning device can fit in with more space. .

c) Due to the structure of the mold for wet powder molding, the size of the upper mold is large, and the installation space for the upper mold is accordingly large. For this reason, the two guide post system of a normal mechanical press for dry powder is weak against uneven loads due to the structure of the press, and a four guide post system is used for wet molding.

If this method is adopted, the weight of the part connected to the upper ram will increase significantly and high-speed operation will be difficult. A balancer will be added.

2) The lower ram adjustment (II adjustment) has been changed from the conventional method of turning and locking with a spanner or rod to a method that allows adjustment and locking by turning a handle from the front of the press via the worm shaft.

E) The final part of the adjustment is the final part of the part that is mechanically adjusted by setting mold conditions, etc. (the most advanced part of the adjustment where the effects of backlash and backlash of screws and gears do not appear)
A digital scale is installed on all of the parts so that the net adjustment amount can be understood as data.

4) Others a) If this machine is appropriately arranged, it can be used as a dry powder molding press. For example, the gap 106 (Figure 4)
The arrangement is such that the frame mold 6 is made to follow the upper mold 2 by eliminating the upper mold 2 and bringing the frame 6 into contact with the upper mold 2.

〔effect〕

According to the present invention, it is possible to make the stroke speed of the upper mold and frame mold extremely low in the molding process, and to make the stroke speed of the upper mold and frame mold high in processes other than molding, It is possible to select the optimal conditions for molding, for example, it is possible to maintain the pressure at any position during the molding cycle, or to make the speed variable.
In addition, the overall cycle time can be significantly shortened due to the hydraulic pressure generation rise time and valve responsiveness (there is no loss, etc.) as in the hydraulic type.

[Brief explanation of drawings]

The drawings relate to embodiments of the present invention, and include FIGS. 1 and 2.
The figure is a front view and a side view of the wet powder molding position, Figure 3 is a perspective explanatory view showing an overview of the mechanism, Figure 4 is an explanatory view showing an overview of the frame drive mechanism, and Figure 5A is a cross section showing the gusset. A front view, FIG. 5B is a cross-sectional front view showing another example of Guiscent, and FIG. 5C is a cross-sectional side view taken along the vc-vc line.
Fig. D is a plan view of the frame used in the guiset shown in Fig. 5B, Fig. 6 is a cross-sectional front view of the upper mold drive mechanism in the frame, Fig. 7 is a cross-sectional side view taken along the line ■-■, and Fig. 8 is a cross-sectional view of the upper mold drive mechanism in the frame. Fig. 6 is a right side view with parts broken away, Fig. 9 is a cross-sectional front view of the upper ram part, and Fig. 9 is a cross-sectional front view of the upper ram part.
Figure 0 is a cross-sectional side view of the frame-type drive mechanism, Figure 10A is a line diagram explaining the net pressurizing force, Figure 11 is a front cross-sectional view of the center of Figure 10, and Figure 12 is a cross-sectional side view showing the T-ram part. Figure, 13th
The figure is a cross-sectional plan view taken along the line x■-xm, and Figure 14 is a
A plan view of the cleaning device, FIG. 15 is a front view thereof, FIG. 16 is a cross-sectional front view of the suction part, FIG. 17 is a cross-sectional front view of the cleaning unit, and FIG. 18 is an explanatory diagram showing the process and movement of each part. FIG. 19 is an explanatory diagram showing the movement of three cams of the restraining means. 1... Molded product, 2... Upper mold, 3... Cavity,
4... Lower mold, 5... Slurry powder raw material, 6...
Frame type, 7... Guiset, 8... Frame, 20.
... Frame for upper mold, 22 ... Frame for frame mold, 24
...Upper mold holder 26...Upper ram part, 28...T
Mold arm, 3o... Removal/cleaning device, 32... Servo motor, 33... Pulley, 34... Belt, 3
6...Combination air clutch brake, 37
...Pulley, 38...Worm, 40...Worm wheel, 42...Pinion, 44...Gear, 46
...Main shaft, 48...Rotary encoder, 50...
・Upper traverse, 52...Lower traverse, 54...
Main guide post, 56...Bearing, 58...Upper mold holder, 60...Upper ram, 62...Eccentric disk, 63...Boss for installation, 64...Conlondo, 66
...Pin, 67...Belt tension bolt, 68...
・Frame transfer al1 means for upper die, 69...Air cylinder, 7o...Gui traverse, 72...Lower ram, 7
4... Lower ram guide post, 76... Bearing, 78...
... Bearing, 8o... Hydraulic cylinder, 81 River biasing means,
82...Knockout cam, 84...Lower ram lifting prevention cam, 86...Lower ram forced return cam, 8B...
Knockout cam follower, 90... Lever plate, 92... Spring, 94... Stroller, 96...
Non-kout amount adjustment mechanism, 98... Lower ram floating prevention roller, 99... Non-kout amount, 100... Receiver is plate, 102... Gap, 1 (12)... Restraining means, 1
04... Push ring, 106... Gap, 108...
・Draining sheet, 110...feeding roller,] 12
... Winding roller, 114 ... Guide rail, 11
6...Servo motor, 118...Take-out head,
120...Cleaning head, 122...Operation box,
124...Lower die mounting plate, 126...Lower die fixing plate, 1
28... Lower mounting plate, 130... Guide post, 13
2...Lower mounting plate, 134...Linear slide bearing, 1
36... Molded product, 138... Supply pipe, 140...
Communication hole, 142...Communication groove, 207...Rotary seal, 210...Accumulator, 222...Eccentric disk mounting boss, 228...Column base, 2
29...Column, 231...Bearing, 240...Air hose, 241...Nand, 242...Nut,
243...Dual valve, 245...Friction clamper, 301...Balancing valve, 302...
Hydraulic unit, 3 (12)...Oil pressure gauge, 304...
Piping, 306... Load cell, 307... Mounting on flange, 308... Anti-rotation rod, 310... Anti-rotation guide, 311... Flange, 312... Rondo presser, 313... Cylinder , 314... Spacer, 315... Worm wheel, 316... Threaded cylinder, 317... Cylinder, 318... Cylinder guide, 319... Stop bar, 320... Hydraulic piston, 322 ...Rod, 323...Piston rod, 324...Joint flange, 325...Cylinder head, 326...Air piston, 329...Motor, 332...Nand, 333...Spacer , 33
4... Hydraulic chamber, 335... Upper air chamber, 336...
Lower air chamber, 337...Metal, 338...Gear, 3
39...Gear, 341...Worm, 342...
2nd stage shaft, 344... Threaded portion, 345... Worm wheel, 401... Reducing valve with electromagnetic proportional relief, 402... Hydraulic pressure source, 4 (12)...
Oil pressure gauge, 405... Guide frame, 406...
Slide block, 407... Guide shaft, 417...
・Filling depth adjustment screw shaft, 41B...Filling depth adjustment cylinder,
419...Stopper, 421...Packing plate, 424...
... Adjustment end piece, 425 ... Gear, 426 ... Adjustment handle, 438 ... Screw shaft, 442 ... Gear, 44
3... Piping, 502... Base plate, 5 (12)...
・Nut, 506... Lock lever 1507... Worm, 508... Casing, 509... Worm wheel, 511... Handle, 513... Spacer, 514... Nando, 515... Adjustment end piece, 5
16... Arm, 517... Rod, 518...
Dust cover, 520...Digital scale, 521.
... Bracket, 522 ... Threaded part, 601 ... Mounting plate, 602 ... Mounting plate, 6 (12) ... Drive slider, 604 ... Driven slider, 605 ... Driven slider, 606 ... Drive slider, 607... Chain hook, 608... Chain hook, 609...
・Chain, 610... Chain, 613... Drive sprocket, 614... Drive sprocket, 615
... Worm reducer, 616... Worm reducer,
617... Cleaning side drive servo motor, 618... Takeout side drive servo motor, 623... Guide wheel, 626... Fly, 627... Guide rail, 63
1...Supporting member, 632...Front joint plate, 633.
・・Front joint plate, 637・・Dust cover, 64o・
...Rail support, 641...Take-out unit, 64
2...Cleaning unit, 643...Guide wheel,
644...Adsorption part, 645...Vacuum generation part, 646
...Brackeft, 647...Guide post, 648
... Cylinder, 649 ... Support plate, 650 River suction nozzle, 651 ... Ejector, 652 ... Air supply pipe,
653...Cleaning brush, 654...Guide bar, 6
55 river reciprocating drive mechanism, 656... air blow nozzle,
657...Water nozzle, 658...Washing tab, 65
9...Cylinder. Figure 3 Gloss Figure 5B Figure 5C Figure 5D

Claims (21)

[Claims] (1) In the cavity formed by the upper mold, lower mold, and frame mold,
A wet powder molding device that supplies and fills a slurry powder material, compresses and dehydrates it to form a molded product, and includes a frame, an electric servo motor provided on the frame, and a motor rotatably supported by the frame. , a main shaft rotationally driven by the servo motor, a phase detection controller that directly or indirectly detects the rotational phase of the main shaft and controls the servo motor, and a lower mold fixing device that fixes the lower mold to the frame. means; an upper mold frame that holds the upper mold and is supported so as to be movable in a direction in which the upper mold comes into contact with and leaves the lower mold; and a frame that is mechanically driven by the main shaft; , an upper mold frame moving means for moving the upper mold frame in the mold contact/separation direction; and an upper mold frame moving means for holding the frame mold and moving the upper mold frame in the mold contact/separation direction relative to the frame and the upper mold frame. A wet powder molding device characterized by comprising: a frame for a frame mold movably held by a frame; (2) A biasing means for urging the frame in a direction in which the frame approaches the upper mold, and a biasing means that is mechanically driven by the main shaft and restrains the frame in a predetermined position. 2. A device according to claim 1, further comprising restraint means. (3) The apparatus according to claim 1, wherein the phase detection controller is a rotary encoder. (4) The upper die frame is composed of a lower traverse, which is a member that is reciprocated by the frame moving means, and an upper traverse, which is a member that is connected to the lower traverse via a guide post. 2. The apparatus according to claim 1, further comprising upper mold holding means having an upper mold holder at a lower end for holding the upper mold. (5) The apparatus according to claim 4, wherein the upper mold holding means holds the upper mold holder via a hydraulic cylinder mechanism. (6) The apparatus according to claim 4, wherein the upper mold holding means holds the upper mold holder via a pneumatic cylinder mechanism. (7) The apparatus according to claim 4, wherein the upper traverse includes upper mold holding means position adjusting means for adjusting the position of the upper mold holding means in the direction of separation. (8) The device according to claim 2, wherein the urging means is a hydraulic cylinder. (9) The apparatus according to claim 8, wherein the hydraulic cylinder is controlled by a reducing valve with electromagnetic proportional relief. (10) The apparatus according to claim 2, wherein the restraining means is a lifting prevention cam that prevents the frame mold from rising when the upper mold reaches the bottom dead center. (11) The device according to claim 2, wherein the restraint means is a knock-off cam that applies a downward stroke to the frame for knock-off. (12) The apparatus according to claim 2, wherein the restraining means is a forced return cam that forcibly raises the frame. (13) A powder material in the form of a slurry is supplied and filled into a cavity formed by a reciprocating upper mold, a fixed lower mold, and a reciprocating frame mold, and is compressed and dehydrated to form a molded product. In the wet powder molding method, the upper mold is reciprocated by an electric servo motor in a direction toward and away from the lower mold through mechanical means, and the frame mold is biased to achieve a predetermined load within a predetermined period of time. The frame mold is brought into contact with the upper mold with a force so as to follow the movement of the upper mold, and during a period other than the predetermined period, the frame mold is restrained and released from following the upper mold, and the movement of each part is controlled.
A wet powder molding method characterized in that molding is performed by controlling the speed according to a predetermined program by detecting the phase of the electric servo motor. (14) The method according to claim 13, wherein the predetermined biasing force of the frame mold is adjusted according to a molding stroke. (15) Used in a wet powder molding device that supplies and fills a powder material in the form of a slurry into a cavity formed by an upper mold, a lower mold, and a frame mold, and compresses and dehydrates the cavity to form a molded product, and the above-mentioned upper mold An upper mold holding device that includes an upper mold holder that holds a mold and is attached via an attachment mechanism to an upper mold frame that reciprocates in a direction toward and away from the lower mold, wherein the upper mold holder is supported via a hydraulic cylinder mechanism, and includes a pressure control valve that limits the hydraulic pressure of pressure oil that supports the reaction force of the pressurizing force of the upper die in the hydraulic cylinder so that it does not exceed a predetermined pressure. Features an upper mold holding device. (16) The upper mold according to claim 15, further comprising a pneumatic cylinder mechanism between the upper mold holder and the hydraulic cylinder mechanism for reciprocating the upper mold holder in the direction toward and away from the hydraulic cylinder mechanism. holding device. (17) The upper mold holding device according to claim 15 or 16, wherein the attachment mechanism includes a position adjustment mechanism that adjusts the position of the upper mold holding device with respect to the upper mold frame. (18) The cavity formed by the reciprocating upper mold, the fixed lower mold, and the reciprocating frame mold is filled with slurry powder material, compressed and dehydrated to form a molded product. In a frame holding device that is used in a wet powder molding apparatus and has a frame for holding the frame and is movable in a direction toward and away from one of the upper molds, the frame for the frame includes: A frame holding device comprising a biasing means that biases the frame in a direction opposite to the pressing force of the upper die and is capable of adjusting the magnitude of the biasing force. (19) The frame holding device according to claim 18, wherein the urging means is a hydraulic cylinder, and the operating force thereof is controlled by a reducing valve with electromagnetic proportional relief. (20) The frame holding device according to claim 18 or 19, wherein the frame is provided with a frame position adjusting means for adjusting the position of the frame in the direction of separation from the frame. (21) The cavity formed by the reciprocating upper mold, the fixed lower mold, and the reciprocating frame mold is filled with slurry powder material, compressed and dehydrated to form a molded product. In a mold holding device that is used in a wet powder molding device and holds the frame mold and the lower mold, the lower mold supports the lower mold and removably engages with a fixed part of the wet powder molding device. a mold fixing part; and a frame mold supporting part that supports the frame mold and is supported by the lower mold fixing part so as to be movable in a direction in which the frame mold approaches and separates from the upper mold with respect to the lower mold fixing part. A mold holding device characterized by: