JPH0357592A - Mold press equipment having electric servomotor and link mechanism - Google Patents

Abstract

PURPOSE:To secure the pressurizing force at the time of pressing and to adjust the pressurizing speed and the stroke by bringing an electric servomotor which can rotate forward and backward to numerical control, and transferring driving force from the motor to a press die by a rotation/reciprocating motion converting means. CONSTITUTION:When an electric servomotor 8 starts to drive, driving force from its motor 8 is transferred to a press die 4 through a link mechanism 16. Accordingly, pressurizing force required for pressing a forming target object can be secured. Also, driving of the electric servomotor 8 is controlled by a numerical control circuit 21. Moreover, driving force of a forward/backward rotation R of the electric servomotor 8 is transferred to the press die 4 by the link mechanism 16. Accordingly, when the servomotor 8 stops from a state of a forward rotation R1, the press die 4 also stops. By stopping the driving by the servomotor 8 in the course of pressurizing the forming target object by the press die 4, and controlling this stop time, the pressurizing time to the forming target object can be adjusted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mold press device, and more specifically, the mold press device has an electric servo motor as a driving means, and the electric servo motor is numerically controlled. Rotates the driving force of the above electric servo motor in forward and reverse rotation.
The reciprocating motion is transmitted to the link mechanism through the reciprocating motion converting means, and the link mechanism facilitates securing the pressurizing force, adjusting the pressurizing speed, adjusting the stroke, and adjusting the pressurizing time in the mold press. The present invention relates to a mold press device having an electric servo motor and a link mechanism that facilitates improving the working environment at the mold press work site and also enables efficient exchange of press dies.

[Prior Art] As is well known, a mold material such as resin powder or ceramic powder is put into a cavity between an upper mold and a lower mold,
Mold presses are used in various fields to press and heat this resin powder to form a molded product into a predetermined shape.

For example, it is widely used in the manufacture of electrical elements such as photoelectric conversion elements or ICs.

Here, in the press die consisting of the upper die and the lower die, the upper die is fixed and the lower die is driven from below toward the upper die, or the lower die is fixed and the I-. The mold is driven from above toward the lower mold. In addition, as for the above-mentioned pressing process, first, in the front part of the pressing process, the molding material such as the resin powder is introduced between the above-mentioned upper mold and lower mold, and then in the pressing process, the molding material is put in between the above-mentioned upper mold and lower mold. The mold material is pressurized and heated, and then, in a subsequent step of the pressing process, a molded product such as an IC is taken out from between the upper mold and the lower mold.

Conventionally, hydraulic mechanisms, pneumatic mechanisms, and combination mechanisms thereof have often been used as drive means for the mold press apparatus for the mold press. More specifically, for example, a radial pump as a hydraulic pump is used, and a discharge amount control servo motor continuously adjusts the discharge amount of pressure oil per unit time from this radial pump, and the discharge amount from the radial pump. The pressurized oil is guided to a hydraulic piston, which drives the press die. When this hydraulic pressure is used, the pressurizing force is increased by reducing the amount of pressure oil discharged from the radial bomb when the press mold L is clamped, that is, when pressurizing. (1) The pressurizing speed of the press mold can be increased by increasing the discharge amount of pressure oil. and,
The above-mentioned radial pump is capable of continuously adjusting the discharge amount of pressure oil from positive to negative. That is, the radial bomb can switch between discharging and suctioning pressure oil, and
The discharge amount and suction amount of pressure oil can be continuously adjusted. Therefore, by setting the amount of pressure oil discharged from the radial bomb to zero, the interval between the lx mold and the lower mold of the press mold can be fixed.

For this reason, it is easy to adjust the stroke and pressurizing time of the press die, and the ease of adjusting the pressurizing time is particularly important for presses that heat at the same time as pressurizing, such as the mold press. It is essential.

[Problems to be Solved by the Invention] With the mold press device using hydraulic pressure according to the prior art, it is possible to easily secure the pressurizing force and adjust the pressurizing speed, and it is also possible to easily adjust the stroke and pressurizing time. .

However, when the oil pressure is used, heat is generated in the pressure oil due to a change in the pressure of the pressure oil, and this heat of the pressure oil is transmitted to the surrounding atmosphere. As a result, the temperature around the mold press apparatus rises, which sometimes worsens the working environment during press operations. In addition, the pressure oil may leak to the outside from the radial pump, hydraulic piston, piping, etc. between them, and the mold press apparatus and its surroundings may be contaminated with the pressure oil. Moreover, 1-,
There was also a risk of flames emanating from the pressurized oil. Furthermore, since the radial pump is always operated regardless of whether or not pressure oil is being discharged, it has been difficult to reduce noise from the radial pump. Generally speaking, when hydraulic pressure is used as the driving means for the mold press equipment, it is difficult to improve the work environment in which the press is operated.

In addition, there are many products to be molded these days, and small-lot production of a wide variety of products is progressing. Therefore, the pressing force, speed, pressing time, and stroke of the press mold must be precisely and frequently numerically controlled for each product. We are required to make it possible. By numerically controlling the servo motor for controlling the discharge amount of the radial pump, the pressurizing force, pressurizing speed, and pressurizing time of the press mold can be easily controlled. However, the stroke is determined by the amount of pressure oil in the hydraulic piston.

The amount of pressure oil in the hydraulic piston is the sum of the amounts of pressure oil discharged from the radial pump. However, the adjustment of the amount of pressure oil discharged from the radial bomb is performed continuously by the servo motor for controlling the amount of discharge, and it is difficult to integrate the amount of pressure oil discharged at a practical level. It's not easy. It is particularly difficult to put it into practical use at low cost. Further, if there is a time error in adjusting the discharge amount of pressure oil by the discharge amount control servo motor, the integrated amount of the pressure oil discharge amount will be greatly deviated. Based on the above, when trying to numerically control the mold press equipment using hydraulic pressure, it is difficult to accurately adjust the stroke of the press mold while making it low cost and compact. Ta.

Furthermore, conventionally, in the press operation, the press process and the non-press process were performed alternately. That is, in addition to the time required for the pressing process, the pressing process requires time for the non-pressing process, particularly for exchanging press dies, making it difficult to improve the overall efficiency of the pressing process.

[Object] Therefore, the object of the present invention is to provide a mold press device for mold pressing the above-mentioned large-sized object, which uses an electric servo motor capable of forward and reverse rotation as the drive means. At the same time, the driving force from the electric servo motor is transmitted to the press mold via the link mechanism by the rotation/reciprocating motion conversion means, thereby ensuring the pressing force and pressurizing speed during the pressing. , stroke adjustment, and pressurization time can be realized more easily, simply, and at low cost. Moreover, it is easier to improve the working environment when working with the mold press, thereby increasing work efficiency. To provide a mold press device having an electric servo motor 12 and a link mechanism that can be easily raised.

Another object of the present invention is to provide a mold press device that controls an electric servo motor and a link mechanism that allows the press mold to be moved from a press position to a mold exchange position, thereby efficiently exchanging the press mold. .

[Means for Solving the Problems] The present invention has the following technical means for solving the above problems. That is, to explain this using the reference numerals used in the attached drawings corresponding to the embodiments, the object to be molded is positioned between an upper mold and a lower mold containing heating means, and the object is placed between the upper mold and the lower mold. In a mold press device for pressurizing and heating the object to be shaped by driving a press mold formed by a driving means to pressurize and heat it to shape it; A numerical control circuit 21 is connected to the electric servo motor 8 to constitute a drive control section, and the output shaft 9 of the electric servo motor 8 is connected to the link mechanism 1 through a rotation/reciprocating motion conversion means.
6, and one of the upper mold 2 and lower mold 3 of the press mold 4 is connected to the link mechanism 16 to drive the press mold 4. This is a mold press device with a mechanism.

One of the press molds 4, which is more powerful than the upper mold 2 and the lower mold 3, is a plurality of molds that are vertically disposed in parallel to each other on the base 13 of the mold press device l. It is supported by a guide post 5 and is configured to move in parallel along the guide post 5, and is configured to move in parallel along the guide post 5.
A leader 12 of the reciprocating motion converting means is erected approximately at the center of the area surrounded by the plurality of guide posts 5, and is rotated R by being driven by the electric servo motor 8.
A slider 15 is screwed onto the leader 12 to constitute rotation/reciprocating motion conversion means, and an input side link arm 17 whose one end 17a is pivoted to the slider 15 and the above-mentioned The output side link arm 18 has one end 18a pivotally attached to one of the press molds 4, and the support link arm 18 has one end 19a pivotally attached to the mold press device 1, and the input side link arm 1
7 other end +7b and the other end 18 of the output side link arm l8
b and the other end 19b of the support link arm 19 are connected, and the plurality of link mechanisms 16 are arranged symmetrically with the leader 12 and slider 15 in between. The plurality of link mechanisms 16 are operated synchronously via the leader 12 and slider 15 by driving the electric servo motor 8 provided singly in the mold press device 1, so that the plurality of link mechanisms 16 are actuated synchronously. It is also preferable to provide a mold press apparatus having the above electric servo motor and link mechanism, characterized in that it is configured to drive one of the molds.

One of the press molds 4 consisting of the upper mold and the lower mold 3 to be driven has a plurality of guide posts vertically disposed on the base 13 of the mold press device l and parallel to each other. 5 to move in parallel along the guide post 5, and one end 19a' is connected to the output shaft 9 of the electric servo motor 8 to function as a rotation/reciprocating motion conversion means. crank-shaped input/support link arm 19' for
and an output side link arm l8 having one end 18a pivoted to one of the driven molds, the other end 18b' of the input/support link arm 19', and the output side link arm l.
8 and the corresponding electric servo motor 8 are arranged symmetrically with respect to the center of the area surrounded by the plurality of guide posts 5. By synchronously driving the plurality of electric servo motors 8, the plurality of link mechanisms 16 are operated synchronously, and the press mold 4 is
It is also possible to provide a mold press apparatus having the above-mentioned electric servo motor and link mechanism, characterized in that the electric servo motor drives one of the molds.

Furthermore, a press die moving means for horizontally moving the press die 4 consisting of the upper die 2 and the lower die 3 between the press position Pi and the die exchange position P2, and Press type positioning for positioning and fixing at P1●By having a fixing means,
The pressing process can be performed by the press holder 4 positioned at the press position PI, and the mold exchanging work process of the press mold 4 can be performed at a mold exchanging position P2 that extends horizontally next to the press position PI. It is also desirable to provide a press apparatus having the above-mentioned electric servo motor and link mechanism, which is characterized by being able to perform the following functions.

In addition, the press-type moving means has a compressed air supply source 57.
The air lift 29 is made up of a large number of ejection holes 39 for ejecting compressed air from the air, and the ejection holes 39 are disposed along the path of movement of the press die 4. The press mold 4 may be floated from the air lift 29 and moved by compressed air jetted from the jet hole 39 of the press mold 2B.

In this case, the press mold 4 is installed between the upper mold 2 and the lower mold 3 to hold the upper mold 2 against the lower mold 3 and maintain the gap between the upper mold 2 and the lower mold 3. It is preferable to use one that is provided with an upper mold holding means for keeping the molds at a predetermined interval.

Incidentally, the upper mold holding means is a member which is installed upright on the lower mold 3 and penetrates the upper mold 2 to move the upper mold 2 downward relative to the lower mold 3. It is possible to use a space holder 43 having an opening provided along the axial direction in a substantially cylindrical side wall so as to fit into the upper die slide guide 41 from the radial direction.

[Operation] With the above configuration, when the electric servo motor 8 starts driving, the driving force from the electric servo motor 8 is transmitted to the press mold 4 via the link mechanism 16.

At this time, by slowing down the drive of the electric servo motor 8 by the link mechanism 16, this driving force is amplified and transmitted to the press mold 4 as a pressing force.

Therefore, the pressing force required to press the large-sized object can be secured. The driving of this electric servo motor 8 is controlled by a numerical control circuit 21. Therefore, by controlling the number of revolutions per hour of the output side 9 of the electric servo motor 8 using the numerical control circuit 2l, the pressurizing speed of the press mold 4 can be controlled. Moreover, the link mechanism 16 transmits the driving force of the electric surfomotor 8 in the forward and reverse rotations R to the bracelet mold 4 indicated by -E.

Therefore, the electric servo motor 8 rotates forward RIL. When the press mold 4 is stopped from the state where it is, the press die 4 is also stopped. Then, the output shaft 9 of the electric servo motor 8
The rotation angle is controlled by the numerical control circuit 21, and the distance between the upper mold 2 and the lower mold 3 of the press 4 is controlled according to the rotation angle of the output shaft 9 of the electric servo motor 8. can be determined. Therefore, the distance between the upper die 2 and the lower die 3 of the press die 4, that is, the stroke of the press die 4, is
This can be adjusted by controlling the electric servo motor 8 of the numerical control circuit 21. Then, during the pressurization of the above-mentioned threat 1] by the above-mentioned person I/desire 4, I-. By stopping the drive by the electric servo motor 8 and controlling the time of this stop, the amount of pressure applied to the object can be adjusted.

4-. The above-mentioned electric servo motor 8 is used to ensure the pressing force, adjust the pressing speed, adjust the stroke, and adjust the pressing time in the press using the intake servo motor 8 and the υ link mechanism IB. This can be easily realized by numerical control. Maybe,
An electric surf motor 8 is used as a driving means for the mold push/spring unit 1. Therefore, the working environment does not deteriorate due to the use of the conventional oil fF mechanism. Therefore, it is easy to improve the working environment during press work. In addition, the value control 1! ! I
By numerically controlling the drive of the electric servo motor 8 through the path 21, it is possible to further advance the automation of the press position 1 and to improve the working efficiency of the press operation.

Then, the L-written bracelet type 4 is L-written bracelet Q 7 P 12
0 and the mold exchange position P2, and the above-mentioned breath position P
At step 2, the pressing process of the object to be molded is carried out, and at the mold exchange position P2, the press mold 4 can be exchanged.

Therefore, it is easy to efficiently perform the press mold replacement work, and thus it is easy to improve the total work efficiency of the press work.

[Example] Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The first embodiment shown in each of the figures from FIG. 1 to FIG. 13 shows an example in which the present invention is implemented in a mold press apparatus for mold pressing an IC as the above-mentioned shaped product.

The above IC has electronic elements and wiring incorporated on a substrate,
The surrounding area is molded with grease. To perform this molding, the substrate is placed together with resin powder between the upper mold 2 and lower mold 3 of the mold press device 1, and is pressed and heated to about 180° C. to form the mold. In this example, it is assumed that the upper mold 2 of the press molds 4 is fixed to the press device 1, and the lower mold 3 is raised from the bottom to the top in the direction of gravity. The upper mold 2 is fixed to a support bed 6 fixed to the upper end of a four-wooden guide post 5. The guide posts 5 are provided along two directions below the direction of gravity, and are arranged parallel to each other. A reinforcing section 20 is installed on these guide posts 5. The lower end of the guide post 5 is fixed to the base 13 of the mold press device l. A lower bed 7 is disposed between the upper and lower ends of the guide boss I-5. The lower bed 7 is provided with four guide holes 14 through which the guide posts 5 are inserted, and can be moved up and down along the guide posts 1-5. A driving means for causing the lower bed 7 to move downward by 20 degrees is disposed below the lower bed 7.

The above are the same parts as conventional mold press equipment,
In this embodiment of the present invention, the following steps were taken to solve the above-mentioned problems.

That is, it has an electric servo motor 8 as the driving means. An output shaft 9 of this electric servo motor 8 is connected to a timing pulley 11 via a timing belt 1O. The timing boley 11 is attached to the lower end of a leader 12, which is part of the rotation/reciprocating motion converting means and is provided with a ball screw. The leader 12 is the base 1
3. It penetrates from below and extends into two parts. Note that the above-mentioned lower and upper parts indicate the two sides and the lower part in the direction of gravity. The league 12 is attached to the L base 13 via a thrust bearing so that it can freely rotate R' and not move up and down relative to the closing part 13. Note that illustration of the above-mentioned thrust l/bearing is omitted. Slider 1 for reader 12 above
5 is screwed to constitute a four-turn/reciprocating motion conversion means.

The input side of a link mechanism 18 is pivoted to this slider 15. This link mechanism 16 has an input side link arm 17
Then, the output side link arm 18 and the supporting link arm 19 are turned to the right, and the input side end 17a of the input side link arm 23 17 is connected to the slider 15.
one end 18a of the output side link arm 18 is pivoted to the lower surface of the lower bend 7, and the support link arm 18
One end 19a is pivoted to the base, and the other end 17b of the input link arm 17, the other end 18b of the output link arm 18, and the other end 19b of the support link arm 19 are connected. It constitutes a link mechanism 1B. A total of two link mechanisms 16 are disposed on each side of the slider 15 so as to be symmetrical with respect to the leader 12. The servo motor 8 is connected to a numerical control circuit 21. This numerical control circuit 21 includes a tape reader 22a, an input circuit 22b, and an arithmetic circuit 2.
3. It is constructed in a closed loop manner by a servo circuit 24, a rotation angle detection stage 25, and a counter 26, and constitutes a numerical control section together with the electric servo motor 8 and operation m40.

The above-mentioned mold press apparatus main body l' is located at the center of the mold press apparatus l.

Here, the above-mentioned press type 4 of this example has four upper die slide guides 41 installed vertically in the lower die 243 and extending upward in the direction of gravity, and the A slide guide hole 42 is drilled through which the upper die slide guide 41 is inserted. ! In contrast to 3, −■=the upper mold 2 can only move up and down. By fitting a generally cylindrical space holder 43 having an opening along the axial direction into the upper mold slide guide 41, the position of the upper mold 2 relative to the lower mold 3 can be maintained. has been done. A projecting portion 44 is formed on the upper part of the upper mold 2 to be fixed by the upper mold clamp 37. At the bottom of the lower mold 3, there is a projecting portion 45 to be fixed by the lower mold clamp 37.
A hook 32 for hooking the hook 33 of the air cylinder 29 of the press type moving means is formed. Each of the upper mold 2 and the lower mold 3 has a built-in heater that can heat the resin powder and mold the substrate. Since it can be used, detailed description and illustration are omitted. Further, each of the upper mold 2 and the lower mold 3 is formed with four parts that serve as cavities for molding the resin powder and the substrate, and the shapes of these recesses are different from those of the above-mentioned IC to be prohibited. Since various considerations will be made depending on the shape, detailed description and illustration are omitted.

The mold press apparatus main body 1' has press mold positioning and fixing means for positioning and fixing the press mold 4 that has been moved down to the press position iPl between the upper bed 6 and the lower bend 7. ing. The positioning means of this press mold positioning/fixing means is disposed on the upper surface 7a of the lower ped 7, and is located at the press position P.
For positioning the press mold 4 that has been moved to L in the front-back direction, that is, the lower side in FIG. 8 is the front side of the mold press device 1, and the upper side is the rear side of the mold press device The guide roller 35 and the electromagnetic solenoid project from the 4th surface 7a of the lower bed 7, and the projecting state hits the F mold 3, thereby moving the lower mold 3 in the left-right direction, that is, in the left-right direction in FIG. Positioning pin 39a for positioning. 3
Consists of Bb. On the other hand, the fixing means of the press mold positioning and fixing means is provided with the lower base 7 and is moved downward by an ejector using an electric motor and a cam. The lower mold 3 is pressed against the protrusion s45 of the lower mold 3 of the breath mold 4 from above.
It has a lower die clamp 37 for fixing.

The clamp 39 having substantially the same structure as the lower mold clamp 37 is disposed on the upper bed 6. Note that illustration of the ejector is omitted.

Compressed air from a compressed air supply source 57 is ejected onto the upper surface 7a of the lower bed 7, and a large number of ejection holes 39 are used to slightly float the press die 4 with the compressed air.
Two rows of airlifts 29 are arranged side by side in the left and right direction. This air lift 29 is provided with four sets of ejection holes 39 each consisting of nine ejection holes 39, that is, four six ejection holes 39' each consisting of 36 ejection holes 39. ' and 27. A valve 58 is disposed in the piping between the compressed air supply sources 57, respectively.

The above part of the bed 6 has a grip part 52 for attaching and detaching the space holder 43 from the press mold 4 moved to the press position PI, and a support for supporting the grip part so as to suspend it. A space holder attaching/detaching device 55 is provided which includes a member 53 and a gripping air cylinder 54 for driving the gripping portion 52. The gripping portion 52 has two gripping pieces pivotally attached to each other so as to be openable and closable, and is biased by an electromagnetic solenoid to open and close, but the electromagnetic solenoid is not shown. Further, the two-part bed 6 is formed with a relief hole 5B through which the two-part slide guide 4 of the press mold 4 protrudes.

A total of two non-press working devices 27, one each, are disposed on both sides of the mold press main body I', that is, on the left and right positions in FIG.

This non-press work device 27 includes an air thin ring 29 and air lifts 29' and 29 as press mold moving means, a brush 30 for cleaning the lower mold, and a stage 31 for attaching and removing a certain mold object. (See Figure 7) The air cylinder 29 is connected to the hook 3 for hanging the lower mold 3.
2, and an electromagnetic solenoid 34 for causing the locking pin 33 to protrude.
The above-mentioned hanging bottle 33 is made to protrude and is extended and contracted while being hooked to the hanging hook 32 of the above-mentioned lower case 3, thereby moving the above-mentioned lower case 3 between the press position Pi and the mold exchange position P2.
It is intended to be moved. The above air lift 29'
The same type of air lift 29 as the air lift 29 provided in the lower bed 7 is used. The lower mold cleaning brush 30 includes a brush main body 4B, a brush front-back sliding arm 47 for reciprocating the brush main body 46 in the front-back direction, and a brush left-right sliding portion 48 for reciprocating the brush main body 46 in the left-right direction.
It consists of The above-mentioned object attaching/detaching means 31 includes suction heads 49 and 5 for suctioning the mold-pressed IC of the lower sample 34- with negative air pressure; It has a front-back sliding arm 50 and a head left-right sliding part 51 for reciprocating in the left-right direction. In addition to the suction head 49, the 1,000-stage stage 3l for attaching and detaching a certain type of object also includes a resin powder supply means for supplying degreasing powder to the lower mold 3, but detailed description and illustration thereof will be omitted. Here, in FIG. 1, for convenience of illustration, the molded object attaching/detaching means 31 is not illustrated.

With the above configuration, data read into the tape reader 22a and input to the input circuit 22b is output to the arithmetic circuit 23 by operating the operation panel 40. It goes without saying that the above data can be changed by operating the operation panel 4o. Then, in the arithmetic circuit 23, the data is applied to the electric servo motor 8.
It is converted into a drive pulse for driving the servo circuit 24, which is then distributed to the servo circuit 24. Next, the electric servo motor 8 is driven by the servo circuit 24. here,
Since the numerical control circuit 2l in this example is of a closed loop type, the servo circuit 24 has a comparison circuit and a servo amplification circuit, but since these comparison circuits and servo amplification circuits are well known, detailed description and illustration thereof will be omitted. are doing. Then,
The rotation angle of the output shaft 9 of the electric servo motor 8 is detected by the rotation angle detection stage 25 and digitized by the counter 26, and the digitized rotation angle and the drive pulse are transferred to the comparison circuit of the servo circuit 24. is always compared by If an error occurs between the drive pulse based on the data and the digitized rotation angle, the drive of the electric servo motor 8 is controlled in a direction to reduce this error. Next, the leader 12 is rotated R' by the driving force from the electric servo motor 8 via the timing bell 10 and the timing pulley 11. Then, due to the simultaneous rotation R' of the leader 12, the slider 1
5 can be moved up and down S'.

Here, the rotation R of the electric servo motor 8 in the direction of moving the slider 15 upward 51' is defined as normal rotation R1, and the rotation R of the electric servo motor 8 in the direction of moving the slider 15 downward 32' is defined as reverse rotation R2. Describe it. The link mechanism 16 is actuated by this raising of the slider 1531 SL'.

That is, as shown in FIG. 2, the force F1 applied to one end 17a of the human power side link arm 17 due to the rise St' of the slider 15 is combined with the horizontal reaction force F2, resulting in a stress F.
It becomes 3. This stress F3 is applied to the other end 19b of the support link arm l8, and is combined with the reaction force F4 applied from the other end 19b toward the one end 19a to become stress F5. This stress F5 is applied from the other end 18b of the output link arm 18 to one end +8a, and is transmitted to the lower head 7.

A horizontal portion F6 of the stress F5 transmitted to the lower bed 7 is received by the guide post 5, and a vertical component F7
becomes a force that causes the lower head 7 to rise S1. As described above, the lower bed 7 is raised to the second position S1. Next, as the lower bed 7 is raised S1, the lower die 3 is also raised S1. The resin powder and the substrate between the second mold 2 and the lower mold 3 are pressurized. At this time, the upper mold 2
The resin powder and the substrate are heated and molded by the heaters built into each of the lower molds 3. And at this time,
Above 32 The link mechanism 16 is as shown in FIG. FIG. 3 shows that the force F1 applied to one end 17a of the input link arm 17 causes a vertical force F7 of the stress F5 that causes the lower bed 7 to rise S1. Here, the change in the stroke of the lower mold 3 with respect to the rotation angle of the output shaft 9 of the electric servo motor 8 is as shown in the graph shown in FIG. This graph shows that the stroke 1 changes as the output shaft 9 of the electric servo motor 8 rotates R. That is, it can be seen that the stroke is determined by the rotation angle of the output shaft 9 of the electric servo motor 8. It can also be seen that the amount of change in the stroke per unit time, ie, the pressurizing speed, is determined according to the amount of change in the rotation angle of the output shaft 9 of the electric servo motor 8, ie, the rotation speed, per unit time. The rate of change of the stroke with respect to the rotation angle of the output shaft 9 of the electric servo motor 8 is shown in the graph of FIG. This graph shows that the rate of change of the stroke is determined according to the rotation angle, and that the rate of change of the two strokes decreases as the rotation angle increases. More specifically, for example, when the output shaft 9 of the electric servo motor 8 is rotated R1 at a constant rotational speed, as the lower shaft 3 rises S1, the pressurizing speed during the rise S1 increases. It shows that it gets smaller. It is clear that when the output of the electric servo motor 8 is constant, as the rate of change of the stroke 1 becomes smaller, the pressing force applied to the lower die 3 becomes larger. That is, as shown in the graph of FIG. 6, the pressing force increases as the rotation angle of the output shaft 9 of the electric servo motor 8 increases. Furthermore, at the upper limit of the rise St of the lower die 3, the pressing force becomes infinite.

However, in the mold press, the pressing force does not need to be infinite, and more specifically, for example,
Approximately 0 ton may be sufficient in some cases.

Therefore, the forward rotation limit of the output shaft 9 of the electric servo motor 8 can be selected and determined within a range in which the pressing force required for the mold press can be secured. As described in ``2'' above, the link mechanism 16 can ensure the pressurizing force necessary for the mold press, and the numerical control circuit 2l can control the rotation angle of the output shaft 9 of the electric servo motor 8. By determining the rotation limit, the stroke of the lower mold 3 can be determined, and by stopping the drive of the electric servo motor 8 at this forward rotation limit,
In this case, the time of IL can be adjusted as the pressurizing time, and the pressurizing speed of the lower die 3 can be adjusted by controlling the rotation angle per unit time of the output shaft 9 of the electric servo motor 8. Furthermore, compared to the case where a hydraulic mechanism is used as the drive means described in (h), no heat is generated due to changes in the pressure of the pressure oil.

Therefore, the ambient temperature of the mold press equipment I is above A.
The working environment will not be deteriorated.

Naturally, the mold press apparatus 1 and its surroundings will not be contaminated due to leakage of pressure oil, and flames will not be generated from the pressure oil. The electric servo motor 8 described in -h is driven only during IJTsI and lowering S2 of the lower mold 3, and when the lower mold 3 is stopped, the electric servo motor 8 is also stopped. Therefore, the generation of noise from the electric servo motor 8 during the entire operation of the mold press can be easily reduced. Overall, it is easy to improve the working environment in the work of the mold press described in Section 12.

Here, in another press device, an electric motor and a crank that rotate in one direction are used, and a flywheel or the like is used to keep the rotational speed of the electric motor rotating in one direction as constant as possible. There are press machines, but such press machines are preferable for continuous pressing with as constant a pressure tact as possible, such as when punching or bending a plate-shaped object. It is practically impossible to use it for a press that requires a relatively long pressurizing time and requires adjustment of this pressurizing time.

Next, after the pressing process as described in (b) is completed, the press die 4 is moved from the press position P1 to the die exchange position P2.
move it to Here, the movement T of the press mold 4 in the pre-process and post-process of the press process is described.
I will explain about it. Here, it is assumed that the press die 4 can be moved T between the die exchange position P2 on the left side of the mold press equipment 211 in FIGS. 1 and 7 and the press position WPI. In addition, in the seventh movement T, the movement T from the mold exchange position P2 to the press position Pl is carried out by the transport T.
1, from the press position P1 to the mold exchange position P.
The movement T up to 2 will be described as unloading T2 to distinguish it. First, at the time of carrying in T1, the upper mold 2 of the press mold 4 is
The space holder 43 is attached to the upper mold slide guide 41 between the upper mold and the lower mold 3.

Therefore, at this time, the distance between the upper mold 2 and the lower mold 3 is maintained at a predetermined distance L. Further, at this time, the substrate and the greasing powder are put into the four parts of the lower mold 3 that will become the cavities. The valve 58 between the compressed air supply source 57 and the air lifts 29, 29' is then opened, and the compressed air from the compressed air source 57 flows into the air lifts 29, 2.
The compressed air is ejected from the ejection port 39 of the press mold 9 and causes the press die 4 to float slightly. And the locking pin 33 of the air cylinder 29
is projected and is hooked to the hook 32 of the lower mold 3. Next, the press mold 4 is urged by the air cylinder 29 via the latching bin 33 and the latching hook 32, and is carried from the mold exchange position P2 to the press position PL on the lower bed 7 Tl. be done. At this time, the J2 press 4 is sent along the air lifts 29, 29', and is sent below the press mold 4 according to the position R above the lm air lifts 29, 29' of the press mold 4. The opening and closing of the valve 58 is selectively controlled so that the compressed air is jetted from the six jetting groups 39' located therein, so that the amount of compressed air consumed can be reduced as much as possible. (See FIG. 8) At this time, of the left and right positioning bins 39 of the lower bed 7, the right positioning bin 39a is made to protrude. Next, the press die 4 sent from the die exchange position P2 to the press position P1 is guided by the guide roller 35 and hits the positioning bin 39a.

(See FIG. 12) Next, the L-shape η43 is fixed to the lower bed 7 by the lower mold clamp 37, and the upper mold 2 is fixed to the -L head 6 by the L-shape clamp 39. Ru. At this time, the -L mold 2 is slightly lifted upward by the upper mold clamp 39.

(See Figure 11) In Figure 11, the guide post 5
Also, illustration of the space holder attachment/detachment device 55 is omitted. Also, when this fixation is performed, the air lift l・29, 29
'The pulps 58 are all closed. Next, the above-mentioned gripping part 1] 2 grips the above-mentioned space holder 43 by means of the air cylinder 54 for the gripping part in the space holder attachment/detachment i155. (See FIGS. 9 and 10) Next, the space holder 43 is removed by pulling the grip part 52, while gripping the space holder 43, by the grip part air cylinder 54. As described above, I. Press mold 4 is carried in T
I will be treated.

Next, a pressing process is performed as described in 1-. Next, after the pressing process described in I-- is completed, the press die 4 is loaded in the L order opposite to T1, that is, the base 39 and the holder 43 are attached, and then the L-shaped clamp 39 and the lower die clamp 37 are attached. The fixing is released, and then the air cylinder 29 moves to L position P1.
From there, the press mold 4 is carried out T2 to a plastic exchange position P2. Each step of the mold press operation by carrying in the press mold 4, applying pressure and heating, and carrying out the press mold 4 will be described next with reference to FIG. 13. Here, as the breath holy 4, the left press 544a and the right press fi4b
shall be used. First, in the first step, the L left presses 5 and 4a are carried from the k-side mold exchange position P2 to the press position P{, and are positioned 1 and fixed. At this time, it is assumed that the mold press 54b on the right side press mold 54b has been completed in advance.Next, in the second step, the left press mold 4a that has been placed in the press position P1 is
At this time, the lower die 3 is moved up by the electric thermostat 8 to pressurize and heat the resin powder and the substrate.

Next, after the above-mentioned pressurization and heating, the above-mentioned lower mold 3 is lowered S2 in the third stage. Then, in the pressing process of the second process 40 and the third process, η1 on the right side of letter L
At the exchange position, take out the mold-pressed IC from the right side brace 4b using the molded object attachment/detachment f-11R31 described in h, and then remove the resin powder adhering to the lower material 3 using the lower material cleaning brush 30 described in L. Then, the substrate and resin powder on which the IC is to be formed are put into the mold press 3 shown in -E. These operations are described as non-press operations. Then the fourth
In the process, the left press die 4a is carried out T2 to the left die exchange position P2, and the right press die 4b is carried T2 from the right die exchange position P2 to the press position P1. Thereafter, in the same manner, the above-mentioned pressing process is performed alternately using the right-hand press mold 4b and the left-hand press mold 4a.

As described above, since the pressing process and the non-pressing process can be performed simultaneously, it is easy to improve the working efficiency of the mold press.

When changing the type of IC to be mold-pressed, the press mold 4 corresponding to the type can be replaced at the mold exchange position P2. At this time, press die 4's 2 yen! Since the press mold 2 and the lower mold 3 can be replaced at the replacement position P2 in 4-.eta.j while being kept as one body, the press mold 4 can be easily replaced.

Therefore, it is easy to improve the total working efficiency of the mold press. In addition, since the space holder 43 can be installed between the upper mold 2 and the lower mold 3 of the press mold 4, -1- while the upper mold 2 and the lower mold 3 are integrated,
Furthermore, between the upper mold 52 and the lower mold L 3, it is possible to perform non-pressing operations such as taking out the IC, cleaning the lower ff 4 3, and inserting the substrate and resin powder, and moreover, the space holder 43 can be removed. Because you can
This enables the downward movement S of the lower plastic 3 at the press position P1.

Nowadays, in the current situation where mold presses are becoming more diverse and in small lots, it is possible to numerically control the mold press equipment l, thereby adjusting the pressurization speed, stroke, and pressurization time according to the product type. This allows for easy switching. Since the breath mold 4 can be easily replaced, it is possible to more easily change the product type in the mold press apparatus 1.

Here, since two link mechanisms 18 are provided in this example, when driving the lower bed 7, the lower head 7 can be driven with left and right balance by the two link mechanisms l6. . Note that the number of link mechanisms 16 is not limited to two as described above, but may be three, four, or five.
Since the lower bed 7 is approximately rectangular, there are a total of four link mechanisms 1, one at each of the four corners of this approximately rectangle.
It is preferable to arrange 6.

Further, although the space holder 43 serving as the upper die holding means has a substantially cylindrical shape with an opening in the side wall in this example, the shape of the space holder 43 is not limited to this example.

Moreover, in order to move the upper mold 2 and the lower mold 3, a rail or the like 43 may be used instead of the air lifts 29, 29'. However, the press die 4, especially the lower die 3, has the heater built-in, and in this example, the heater is 180 mm.
It is heated to about ℃. For this reason, when the above-mentioned rail etc. are used, it is necessary to take measures such as selecting the lubricating oil to be used for the above-mentioned rail etc. Moreover, the air lift 29 as mentioned above,
When the press die 29' is used, the air lifts 29, 29' and the press die 4 do not come into contact with each other during the movement T of the press die 4, so the lubricating oil itself is not required. In other words, since the air lifts 29, 29' are easy to maintain, the mold press apparatus 1 can be maintained easily.

Next, a second embodiment will be described with reference to FIG.

In this second embodiment, only the differences from the first embodiment will be explained in detail.

In this second embodiment, two electric servo motors 8 are disposed below the lower board 7, on the left and right, and the output shafts 9 of each of the electric servo motors 8 are horizontal along the front-rear direction. It is arranged to look intimidating. The output shaft 9 of each of the electric servo motors 8 is connected to one end 18a' of each input support link arm 19' of the link mechanism 1B disposed corresponding to each of the electric servo motors 8. Fixed directly. Each of the link mechanisms 1B has an output link arm 18, an input/support link arm 19', and a synchronization auxiliary link arm 17.
', and each synchronization assisting link arm 17' of the two link mechanisms 16 is connected to a synchronization assisting slider 15'.
It is attached to the shaft. The synchronization assisting slider 15' is supported by two slider guides 59 so as to be movable up and down.

In this example, the upper mold 2 and the lower mold 3 are constructed separately, and are provided with the space holder attaching/detaching device 55.

In addition, each of the two electric servo motors 8 is connected to the numerical control circuit 2l so that they are driven synchronously. According to the above configuration, when the two electric servo motors 8 are driven synchronously, the link mechanisms 16 corresponding to each of the two electric servo motors 8 also operate synchronously. Therefore, the lower bed 7 can be driven with left and right balance. At this time, each synchronization assisting link arm 17' of the link mechanism 18 is connected to the synchronization assisting slider 15.
' and the synchronization assisting slider 1
5'' is configured to move up and down along the slider guide 59, it is easier to synchronize the operations of the two link mechanisms 16.
In the embodiment, two electric servo motors 8 are used. Therefore, compared to the first embodiment, the circuit configuration of the numerical control circuit 21 is slightly more complicated in order to drive the two electric servo motors 8 synchronously. However, if the above-mentioned pressing forces are equal, an electric servo motor 8 with about half the output can be used for each electric servo motor 8 6 Therefore,
By using small-sized electric servo motors 8 as the individual electric servo motors 8, it is easy to make the entire mold press apparatus 1 small and compact. Furthermore, when two electric servo motors 8 having the same output as the electric servo motor 8 used in the first embodiment are used, the pressing force can be approximately doubled. Furthermore, in this second embodiment, during the operation of the mold press, while the upper mold 2 is fixed to the upper bed 6, only the lower mold 3 is moved between the press position P1 and the mold exchange position NP2. This allows the T to move between the two. Therefore, the above-mentioned mold press can be performed using one upper mold 2 and two lower molds 3 in one type of mold press. Further, when changing the type, the upper mold 2 may be used in common, and only the lower mold 3 may be replaced.

[Effect 1 As detailed above, the present invention has the following effects.

According to the invention of claim 1, there is provided a mold press device for mold pressing the object to be molded, wherein an electric servo motor capable of forward and reverse rotation is used as the drive means, and the electric servo motor is numerically controlled. At the same time, by transmitting the driving force from the electric servo motor 47 to the press mold via the link mechanism by the rotation/reciprocating motion conversion means, it is possible to secure the pressing force and adjust the pressing speed during the mold press. Stroke adjustment and pressurization time igis can be realized more easily, simply, and at low cost, and it is also easier to improve the working environment in the mold press work, thereby increasing work efficiency. A mold press device having an electric servo motor and a linkage mechanism can be provided.

Further, according to the invention of claim 2, since the electric servo motor is single, control by the numerical control circuit is simplified, and the driven die of the press die is controlled by a plurality of link mechanisms. It can be balanced and driven.

According to the invention of claim 2, since a plurality of electric servo motors are provided, the mold press apparatus can be made smaller and more compact by using a small electric servo motor with low output for each of the electric servo motors. , a single electric servo 48 motor enables the pressing force to be applied to a degree that is impossible with a plurality of electric servo motors, and the one of the press dies to be driven is balanced by a plurality of link mechanisms. and can be driven.

According to the fourth aspect of the invention, the press die is movable from the press position to the die exchange position, so that the press die can be exchanged at the die exchange position. Therefore, the press mold can be exchanged efficiently, and the total working efficiency of the mold press can be easily improved.

According to the invention as set forth in claim 5, since an air lift is provided as the press die moving means, the press die is floated on the air lift when the press die is moved. Therefore, no friction occurs between the press die and the air lift. Therefore, it is easy to maintain and manage the air lift, and thereby the mold press apparatus.

In addition, according to the invention of claim 6, when the upper mold holding means is installed between the upper mold and the lower mold of the press mold, the upper mold and the lower mold can be moved between the upper mold and the lower mold before and after the pressing step. The upper and lower molds can be handled integrally.

Therefore, it is easier to improve the working efficiency of the mold press, and in particular, it is easier to replace the press mold.

According to the invention set forth in claim 7, it is possible to realize a space holder suitable as an upper mold holding means for carrying out the invention set forth in claim 6.

[Brief explanation of drawings]

Each of the attached drawings from FIG. 1 to FIG. 13 represents the first aspect of the present invention.
1 is a front view, FIGS. 2 and 3 are front views of the mold press apparatus main body, FIG. 2 is a front view showing the state in which the lower mold is lowered, and FIG. Figure 4 is a graph showing changes in the stroke. Figure 5 is a graph showing changes in the rate of change in stroke. Figure 6 is a front view showing the lower mold being raised. Graphs to show changes in pressurizing force, Figure 7 is a plan view, Figure 8 is an enlarged plan view with the 1-part bed removed, and Figure 9 is the mold press equipment when moving the press mold. FIG. 10 is an enlarged front view to show the main body; FIG. The figure is a side view of the mold press body with the upper part of the upper bed and the lower part of the lower bed omitted, Figure 12 is an enlarged view of the positioning pin, and Figure 13 is a process diagram showing the working process of the mold press. , 5l FIG. 14 is a front view showing the second embodiment. In the figure, 1...Mold press device, 2...Upper mold,
3...Lower die, 4...Press die, 5
...Guide boss L, 8...Electric servo motor, 9...Output shaft, 1
2...Leader, 13...Base 1
5...Slider 15'...Slider for synchronization assistance 16...Link mechanism, 17...Input side link arm, 17'...Link arm for synchronization assistance, l8...・Output side link arm, 19... Support link arm, 18'... Input Support link arm, 21... Numerical control circuit, 29, 29'... Air lift, 39. ...Blowout hole, 41...Upper slide guide, 52 43...Space holder, Arrow R...Rotation of the output shaft of the electric servo motor, Arrow R'...Leader The arrow S... indicates the vertical movement of the lower die.

Claims (7)

[Claims] (1) The object to be molded is placed between an upper mold and a lower mold that have built-in heating means, and the press mold consisting of the upper mold and the lower mold is driven by a driving means to pressurize the molded object. In a mold press device for molding by pressing and heating, it has an electric servo motor 8 capable of forward and reverse rotation, and a numerical control circuit 21 is connected to the electric servo motor 8 to control a drive control section. At the same time, the output shaft 9 of the electric servo motor 8 is connected to the link mechanism 1 via rotation/reciprocating motion conversion means.
6, and one of the upper mold 2 and lower mold 3 of the press mold 4 is connected to the link mechanism 16 to drive the press mold 4. A mold press device with a mechanism. (2) Of the press molds 4 consisting of the upper mold 2 and the lower mold 3, one of the molds to be driven is a plurality of molds vertically disposed on the base 13 of the mold press apparatus 1 and parallel to each other. It is supported by a guide post 5 and is configured to move in parallel along the guide post 5, and is configured to move in parallel along the guide post 5.
A leader 12 of the reciprocating motion converting means is erected approximately at the center of the area surrounded by the plurality of guide posts 5, and is rotated R by being driven by the electric servo motor 8.
A slider 15 is screwed onto the leader 12 to constitute rotation/reciprocating motion conversion means, and an input side link arm 17 whose one end 17a is pivoted to the slider 15 and the above-mentioned It consists of an output side link arm 18 having one end 18a pivotally attached to one of the press molds 4, and a support link arm 18 having one end 19a pivotally attached to the mold press device 1, and the input side link arm 1.
7 and the other end 18 of the output side link arm 18
b and the other end 19b of the support link arm 19 are connected, and the plurality of link mechanisms 16 of the link mechanism 18 are arranged symmetrically with the leader 12 and slider 15 in between. The plurality of link mechanisms 16 are operated synchronously via the leader 12 and slider 15 by driving the electric servo motor 8 provided singly in the mold press device 1, so that the plurality of link mechanisms 16 are actuated synchronously. 2. A mold press apparatus having an electric servo motor and a link mechanism according to claim 1, wherein the mold press apparatus is configured to drive one of the molds. (3) One of the press molds 4 consisting of the upper mold and the lower mold 3 to be driven has a plurality of guides vertically disposed on the base 13 of the mold press apparatus 1 and parallel to each other. It is supported by the post 5 to move in parallel along the guide post 5, and one end 19a' is connected to the output shaft 9 of the electric servo motor 8 to function as a rotation/reciprocating motion conversion means. The input/support link arm 19' is comprised of a crank-shaped input/support link arm 19' and an output link arm 18 having one end 18a pivoted to one of the driven molds, and the other end 19' of the input/support link arm 19'. and the other end 18b of the output link arm 18 are connected together with the corresponding electric servo motor 8 so that the link mechanism 16 and the corresponding electric servo motor 8 are symmetrical about the approximate center of the area surrounded by the plurality of guide posts 5. By synchronously driving the plurality of electric servo motors 8, the plurality of link mechanisms 16 are operated synchronously to drive one of the press molds 4. A mold press apparatus having an electric servo motor and a link mechanism according to claim 1, characterized in that the mold press apparatus is constructed as follows. (4) Press die moving means for horizontally moving the press die 4 consisting of the upper die 2 and the lower die 3 between the press position P1 and the die exchange position P2, and the press die 4 moved to the press position P1. By having a press mold positioning and fixing means for positioning and fixing, it is possible to perform the pressing process with the press mold 4 positioned at the press position P1, and also to make it possible to perform the pressing process by using the press mold 4 positioned at the press position P1, and to connect the molds horizontally to the side of the press position P1. The electric servo motor and link mechanism according to claims 1, 2, and 3, characterized in that the press mold 4 can be replaced at the replacement position P2. A press device with (5) The press mold moving means is composed of a large number of jet holes 39 for jetting compressed air from the compressed air supply source 57, and the jet holes 39 are arranged in a path of movement of the press mold 4. A claim characterized in that the press mold 4 has an air lift 29 disposed along the air lift 29, and the press mold 4 is floated from the air lift 29 and moved by compressed air jetted from a jet hole 39 of the air lift 29. A mold press device comprising the electric servo motor and link mechanism according to item 4. (6) The press mold 4 is installed between the upper mold 2 and the lower mold 3 to hold the upper mold 2 against the lower mold 3 and to maintain the distance between the upper mold 2 and the lower mold 3. 6. A mold press apparatus having an electric servo motor and a link mechanism according to claim 4, further comprising an upper mold holding means for maintaining a predetermined interval. (7) The upper mold holding means is an upper mold that is erected on the lower mold 3 and is penetrated by the upper mold 2 to allow the upper mold 2 to move up and down S relative to the lower mold 3. Claim 4 characterized in that the space holder 43 has an opening provided along the axial direction in a substantially cylindrical side wall so as to be able to fit into the mold slide guide 41 from the radial direction.
A mold press apparatus comprising the electric servo motor and link mechanism according to items 5 and 6.