JPH04442B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic molding apparatus for economically manufacturing molded articles made of thermoplastic resin, particularly doll heads and other parts.

[Prior art]

Conventionally, when molding thermoplastic resin products, such as dolls, using a mold, the injection of raw materials, the opening and closing of the mold, the heating process, the cooling process, and the demolding process each required manual labor. Mechanization and automation of each work is desired.

[Problem that the invention seeks to solve]

The present invention addresses the limitations of conventional technology in the field of molding thermoplastic resin molded products, particularly dolls, including the problems of requiring a large amount of manpower in the molding process, the problems of poor work efficiency in the working environment, and the problems of mass production. The aim is to improve this problem by using continuous/automated molding technology, and at the same time, to provide low-cost, high-quality molded products.

[Means for solving problems]

The present invention includes a heating furnace that forms a molten skin layer on the inner wall of the mold, and a cooling chamber that cools and solidifies the skin layer within the mold, and the mold is moved between the heating furnace and the cooling chamber. a raw material injector for injecting the raw material into the mold, a mold lid opening/closing machine for opening and closing the mold lid of the mold, and a mold holding mechanism for holding the mold. A device for molding synthetic resin dolls, etc., comprising a demolding machine for demolding a molded product from a mold, and equipped with a robot mechanism section movable so that each machine faces the molding die. , the mold holding mechanism section has the heating furnace, a drive mechanism for rotating the heating furnace between directly below the robot mechanism section and the cooling chamber, and a conveyor table that is rotatable on a base; This is a molding device for synthetic resin dolls, etc., characterized in that a detection section for controlling the stop and start of the drive mechanism is provided at the rotation stop position.

〔Example〕

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

The molding equipment consists of a mold holding mechanism part A, A of a molding die (hereinafter referred to as a mold), a heating furnace B as a heating mechanism part, a cooling chamber C, C as a cooling mechanism part, and raw material injection into the mold. It consists of a robot mechanism section D that performs up to and including taking out the molded product, and each operation is automatically controlled by a control panel E of an automatic control mechanism section.

Two mold holding mechanism units A are provided, and a heating mechanism unit, specifically one heating furnace B, is installed at a position where the turning locus of the mold intersects between the mold holding mechanism units A and A. It is provided. The cooling mechanism sections, that is, the cooling chambers C, C, are provided exclusively for the respective mold holding mechanism sections A, A, respectively, on the rotation locus of the respective molds. The robot mechanism part D is installed so that it intersects with the two trajectories formed when the molds of the two mold holding mechanism parts A and A rotate from the heating furnace B to the cooling chamber C. machine 600, demolding machine 70
0, a demolding leak detection and blowing machine 800, a raw material injection machine 900, and a support machine 50 that suspends and holds each of these machines.
Consists of 0. [See Figures 1 and 2] The mold holding mechanism section A holds a mold 20 at the tip of an arm 102 provided on a conveyor table, that is, a rotary table 101, via a spider 117 of a rotary plate.
0 attached and formed. [See FIGS. 8 to 10] That is, the rotary table 101 has rollers 10 rolling on a track 104 laid on a base 103.
5, 105 and the fulcrum pin 1 erected on the base 103
06, and the rotary table 10
A pinion 108 is connected to a geared motor 107 with a brake mounted on the rotary table 101, and a fulcrum pin 1 is mounted on the base 103.
06 is engaged with a rack 109 provided on an arc, so that it can pivot on the base 103 about the fulcrum pin 106.

The arm 102 is supported by a support 110 provided on the rotary table 101, and the arm 102
2 is a double shaft arm consisting of an outer shaft 102 ₁ and an inner shaft 102 ₂ , each of which is connected to a geared motor 11 with a brake.
1,112, and this arm 102
An orthogonal shaft perpendicular to the arm 102, that is, a spider spindle 113 is attached to the tip of the arm 102, and the spider spindle 113 is connected to the inner shaft ₁₀₂₂ through a cylinder 114 and to the outer shaft 1022 through miter gears 115 and ₁₁₆ . , rotation about the axis of spindle 113 (“rotation”), and rotation of arm 102
Rotation (“revolution”) around the axis of is possible.

Rotary plate spiders 117, 117 are attached to both ends of the spider spindle 113, and a plurality of molds 200 are attached to the surfaces of the spiders 117, 117 on the opposite side from the spider spindle 113.

The rotary table 101 is mounted on the base 103 and the mold 2 is mounted on the rotary table 101.
Limit switch 118 that can be stopped at 3 locations: raw material injection and demolding position, heating position, and cooling position for group 00
is provided so that it can be stopped and locked by the braking action of the motor 107.

In addition, the mold 200 is
When the group is horizontal and in a constant alignment direction, arm 1
The arm 102 can be stopped and locked.
The drive unit is equipped with a control unit, and the rotation speed of the spider spindle 113 and the moving speed of the rotary table 101 can also be controlled.

The mold 200 is attached to a frame 201 as a support frame.
For example, 10 pieces are arranged and fixed to the frame 201.
Four pieces are arranged in parallel and fixed to the mounting plate 202. The mounting plate 202 is fixed to the spider 117.

The mounting plate 202 has clamp columns 203 at four locations.
is provided protrudingly, and the top of the clamp column 203 is provided with a locking portion 204 . [See FIGS. 12 to 14] The mold lid 210 is provided corresponding to the arrangement of the mold 200. That is, ten lids 210 are held on each of the four bars 211 so as to be vertically movable by penetrating the handle, and each lid 210 increases the distance between the top surface of the lid body and the bar 211. A spring 220 is provided. A bar 212 is provided on the upper part of the bar 211 to be perpendicular to each bar.
2, a pair of clamp hooks 216 are pivotally suspended by a pin 221 via a clamp mounting plate 215 at a position where they engage with the clamp column 203, and there is a gap between the two clamp hooks 216, 216. A spring 219 is attached to the body which is energized to reduce the size. A column 214 is further provided through the bar 212 at a position that is placed on the upper surface of the clamp hooks 216, 216. This column 214 is vertically movable, and a mold lid opening/closing machine 6 is mounted on the top.
Contact part 217 with 00, clamp hook 2 at the bottom
16,216. The gravity of this column 214 is smaller than the restoring force of the spring 219, and the closed clamp hooks 216, 216
The clamp hooks 216 are opened when the column 214 is pressed downward against the restoring force of the spring 219. Further, electromagnets 6 are provided on the upper surface of both ends of the bar 212.
Magnetic bodies 213, 213 are fixed to the magnetic body 213 so as to be able to come into contact with the magnetic body 02.

Heating furnace B is a forced hot air circulation type pot using a burner as a heat source, and has a spider 117 to which a mold 200 is attached.
has a size that allows it to rotate around the arm 102 and the spindle 113, and there are notches 301 on both sides of the heating furnace B that allow the arm 102 to rotate.
301 is provided, and a door 302 is provided at the entrance through which the mold 200 enters and exits, and is movable up and down by a cylinder having one end of a chain fixed to a piston. A burner 303 and a circulation fan 30 are installed in the furnace.
4 is provided so that hot air can be blown onto the mold, and an exhaust fan 305 is provided on the furnace ceiling. [See Figure 4] The burner 303 uses a downward combustion type propane gas burner, and the furnace is equipped with temperature detectors for automatic temperature control, temperature recording, and temperature digital display. It can be controlled, and the heating time is also controlled by a timer. [See Figures 6 and 7] Note that the openings of the notches 301 and 301 are closed when the heating furnace B is in operation, and the openings of the notches 301 and 301 are closed when the door 302 is opened and closed.
The rotation of the arm 102, the operation of the circulation fan 304 and the exhaust fan 305, the ignition of the burner 303, etc. are also controlled in connection with the control.

That is, the opening and closing of the door of heating furnace B, the rotation and rotation of arm 102, and the rotation of circulation fan 304 and exhaust fan 305 are all interlocked, and when arm 102 enters and exits, door 302 is always open and each fan 304, 305 is opened. At this time, when the rotation is stopped, the burner is also extinguished, which is considered to save energy and protect the working environment.

Cooling chamber C has a size that allows rotation of spider 117 to which mold 200 is attached, and arm 102
A notch 401 serves as an entrance and exit for the mold 200, and an entrance for the mold 200. A shutter 402 as a curtain is provided at the entrance/exit of the mold 200 so that it can be opened and closed by a motor 405, and a curtain-like curtain (not shown) is suspended from the notch 401.

Inside the cooling chamber C, a nozzle for spraying pressurized water and a drainage pit are provided, and a fan 403 for air cooling and water droplet blowing is provided on the side, making it possible to perform slow cooling by combining water cooling and air cooling. An exhaust fan 404 is provided to exhaust hot air and steam generated by cooling. [See FIG. 5] The operating time of the nozzle and fan 403 is controlled by a timer, and the shutter 40 is controlled by a timer.
2, the rotation of the arm 102, and the operations of the nozzle, fan, etc. are harmonized and automatically controlled.

The robot mechanism section D includes a mold lid opening/closing machine 600,
demolding machine 700, demolding leak detection and blowing machine 800,
Raw material injection machine 900 and support machine 5 for holding each machine suspended
Consists of 00. [See Fig. 3] The support machine 500 has an arm 502 having an index section 501 at its tip and is rotatably connected to a column 503, and each of the machines 600, 700, 800, and 900 provided on the index section 501 is moved to the mold position. This brings us to the present.

The index portion 501 is attached to the tip of the arm 502 via a cylindrical column 511 fixed to the tip. A shaft 512 is rotatably supported in the hollow part of the column 511, and a gear is mounted on the circumferential surface of the lower end of the shaft exposed from the column 511, and four support arms 514 are arranged radially around the shaft at the lower end. They are fixedly attached to each other.

A pinion is provided on the column 511 and meshes with the gear via a geared motor 515 with a brake fixed to the column 511.

A cylinder 5 is installed at the tip of the four support arms 514.
17 ₁ , 517 ₂ , 517 ₃ , 517 ₄ are provided, respectively, and a mounting flange 52 is provided at the lower end of each cylinder 517.
1 is fixed to the mounting flange 521, and each machine 6 is fixed to the mounting flange 521.
00, 700, 800, and 900 are connected to move up and down.

In addition, the mounting flange 521 has the above-mentioned each machine 60.
0,700,800,900 are fixedly suspended in a convenient arrangement for the molding process, and the cylinder 5
17,520 is connected to a working fluid pressure device including a hydraulically operable compressor and valve.

Further, the rotation stop positions of the arm 502 and the index section 501 are detected by a limit switch, the rotation speed can also be controlled, and each operation of the robot mechanism section D can be automatically operated by signals.

The mold lid opening/closing machine 600 is formed by a frame 601 fixing an electromagnet 602 and a cylinder 603,
A frame 601 is fixed to the mounting flange 521 and suspended.

The electromagnet 602 is a magnetic body 213 of the bar 212.
The tip of the piston rod 604 of the cylinder 603 is in contact with the clamp hook 216,
They are respectively provided at positions that abut the abutting portions 217 of the columns 214 placed on the columns 216 .

Note that the cylinder 603 is connected to the working fluid pressure device F.
The electromagnets 602 are each connected to an operating power source. [See Figure 11] The demolding machine 700 is adapted to the arrangement of the molds 200 and is equipped with a chuck saw as a chuck claw part, and the demolding leak detection and blowing machine 800 is a blow part equipped with an air blow nozzle. One nozzle and one detection pin are provided for one mold 200.

The raw material injector 900 has a nozzle for injecting a sol-like raw material into the mold 200.

A chute or conveyor for receiving molded products is installed near the column 503 of the robot mechanism D and below the portion where the turning loci drawn by the demolding machine 700 overlap at both turning positions of the arm 502. This chute or conveyor has a demolding machine 7.
A support rod, horizontal bar, or blowing rod is provided at a height that can contact the molded product that is hanging down from the 00 and is pivoting, so that the molded product that does not fall is forced to fall. In addition, the recovered molded products are degreased and
A boiling mechanism for shaping is installed in parallel to the shaping device.

Next, the process of molding the plastic raw material will be explained. For convenience, it is assumed that the raw material is injected into the mold 200 in one mold holding mechanism part _A1 of the mold holding mechanism part A, and the material has been completely cooled in the cooling chamber C after passing through the heating furnace B. The mold holding mechanism section _A2 is placed in a heating furnace B. [See FIG. 2] The rotary table 101 of the mold holding mechanism section _A1 is rotated by the motor 107, and the mold 200 group is moved to the demolding/raw material injection position. Here, the rotary table 101 is locked, and the arm 102 is set and locked at a position where the four rows of the molds 200 are lined up horizontally and in a predetermined direction.

On the other hand, the arm 502 of the robot mechanism section D is rotated by the motor 507, moved to the demolding/raw material injection position of the mold holding mechanism section _A1 , and locked.

First, the shaft 512 is rotated by the motor 515 to position and lock the mold lid opening/closing device 600 above the mold 200 group. Next, the mold lid opening/closing machine 600 is lowered by the cylinder 517 ₁ , and the electromagnet 60 is lowered.
2 and insert the mold lid 210 through the magnetic material 213.
At the same time, the cylinder 603 is operated to open the clamp hooks 216, 216 and release the engagement between the mold 200 group and the mold lid 210.
And the mold lid opening/closing machine 60 is operated by the cylinder 517 ₁ .
0 is raised with the mold lid 210 held at the bottom, and the opening of the lid is completed.

Next, the lock of the shaft 512 is released, the shaft 512 is rotated, and the demolding machine 7 is placed on the mold 200 group.
00 and lock it. and cylinder 5
₁₇₂ , the demolding machine 700 is lowered, and after gripping the molded product with a chuck saw, it is raised to complete demolding.

Subsequently, the shaft 512 is unlocked and rotated to position the demolding leak detection and blowing machine 800 over the group of empty molds 200 and lock it. Then, the machine is lowered by the cylinder ₅₁₇₃ , and after demolding leak detection and blow cleaning are completed, the machine is raised by the cylinder ₅₁₇₃ .

Subsequently, the cylinder 512 is unlocked and rotated to position the raw material injector 900 over the group of cleaned molds 200 and locked.

Then, the injection machine 900 is lowered by the cylinder ₅₁₇₄ to a position where the opening of the nozzle faces the opening of the mold 200, and after injection is completed, the injection machine 900 is raised and returned to the standby position.

Finally, the shaft 512 is unlocked and rotated to position the mold lid opening/closing machine 600 holding the mold lid 210 below, and lowered by the cylinder ₅₁₇₁ . And the electromagnet 602 and the magnetic body 21
3 is in contact with the electromagnet 602, and the cylinder 603 closes the clamp hooks 216, 21 at a position where the clamp hooks 216, 216 can engage with the locking portion 204 of the clamp column 203.
6 is closed to complete the closing of the mold 200.

Since the mold holding mechanism A ₁ is equipped with two spiders 117, 117, the spider spindle 113 is rotated and the same operation is continuously performed on the mold 200 on the other side. be exposed.

When the injection of the raw material into the mold 200 of the mold holding mechanism section _A1 is completed, the rotary table 101 is unlocked and rotated, stopped at the heating position where the mold 200 is accommodated in the heating furnace B, and is locked. Ru.

The heating furnace B houses the mold 200 and has a rear door 302.
is closed and heated by burner 303. At this time, the spider spindle 113 is rotated around the axis of the spindle and around the axis of the arm 102, and a molten skin layer is formed on the inner wall of the mold 200 in a good condition.

After heating, the door 302 is opened, the rotary table 101 is rotated after being unlocked, the mold 200 is moved into the cooling chamber C, and the mold 200 is locked.

After lowering the shutter 402 of the cooling chamber C, in addition to spraying pressurized water from a nozzle, the fan 403 is operated to cool the chamber.

Here, too, the spider spindle 113 is cooled while rotating, and the molten skin layer in the mold 200 is efficiently cooled and solidified.

The other mold holding mechanism part A ₂ is the mold holding mechanism part A ₁
Heating is completed at the heating position when the mold is in the cooling position or demolding/raw material injection position, and after cooling, it is moved to the demolding/raw material injection position. Then, the robot mechanism part D also rotates the arm 502 to the demolding/raw material injection position of the mold holding mechanism part _A2 , and the mold holding mechanism part
The same work as for the mold 200 of _A1 is automatically performed.

In the above-mentioned embodiments, each robot mechanism D is configured to be movable by rotating movement around an axis in the vertical direction and linear movement up and down. It is also possible to provide each machine along the line or to move by horizontal linear movement.

〔Effect of the invention〕

The present invention provides a molding apparatus for synthetic resin dolls, etc., in which a mold holding mechanism section includes a drive mechanism for rotating the mold between the heating furnace, directly below the robot mechanism section, and the cooling chamber; By having a rotatable conveyor table at the top and a detection unit for controlling the stop and start of the drive mechanism at the rotation stop position of the conveyor table, the mold can be rotated in the heating furnace and cooling chamber to heat the mold. , the cooling effect can be carried out efficiently and without excess or deficiency on many molds, greatly increasing productivity, and also accurately injecting raw materials, holding the demolding position, and holding the heating and cooling positions of a large number of mold groups. We are able to provide equipment that can perform molding operations safely, perform good molding operations, and greatly improve product quality.We can also provide equipment that automatically molds thermoplastic synthetic resins without the need for manual labor, and can improve rotational molding equipment. It is possible to improve work efficiency through automation, is suitable for mass production, and can be produced at extremely low cost.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of the whole, FIG. 2 is a plan view thereof, FIG. 3 is a side view of a part thereof, and FIG. 4 is a longitudinal sectional view of the heating furnace. Figure 5 is a side view of the cooling chamber, Figure 6 is a plan view of the burner, and Figure 7 is a side view of the cooling chamber.
The figure is a front view, Figure 8 is a sectional view along the line of Figure 3,
Figure 9 is a sectional view taken along the line shown in Figure 3, Figure 10 is a sectional view taken along the line shown in Figure 9, Figure 11 is a plan view of the mold lid opening/closing machine, Figure 12 is an explanatory diagram of its operation, and Figure 13 is a partial view. FIG. 14 is a sectional view taken along the line of FIG. 13. A...Mold holding mechanism section, B...Heating furnace, C...
Cooling room, D... Robot mechanism section, E... Control panel,
F... Working fluid pressure device, 101... Rotating table, 102... Arm, 103... Base, 104
... Track, 105 ... Roller, 106 ... Fulcrum pin, 107 ... Motor, 108 ... Pinion, 1
09...Rack, 110...Abutment, 111,11
2...Motor, 113...Spider spindle,
114... Cylindrical body, 115, 116... Miter gear, 117... Spider, 118... Limit switch, 200... Mold, 201... Frame,
202...Mounting plate, 203...Clamp column,
204...Locking part, 210...Lid, 211, 21
2... Bar, 213... Magnetic material, 214... Column, 215... Clamp mounting plate, 216... Clamp hook, 217, 218... Contact portion, 21
9,220...Spring, 221...Pin, 301...
...Notch, 302...Door, 303...Burner, 3
04...Circulation fan, 305...Exhaust fan, 4
01... Notch, 402... Shutter, 403...
Fan, 404...Exhaust fan, 405...Motor, 500...Support machine, 501...Index section, 502...Arm, 503...Column, 51
1... Column, 514... Support arm, 515...
...Motor, 517...Cylinder, 521...Mounting flange, 600...Mold lid opener, 601...
Frame, 602...Electromagnet, 603...Cylinder, 604...Piston rod, 700...Mold removal machine, 800...Mold removal leak detection and blow machine, 90
0...Raw material injection machine.

Claims (1)

[Claims] 1 A molding tool that is equipped with a heating furnace that forms a molten skin layer on the inner wall of the molding mold, and a cooling chamber that cools and solidifies the skin layer within the molding mold, and that moves the molding mold between the heating furnace and the cooling chamber. In addition to providing a mold holding mechanism,
A raw material injection machine that injects the raw material into the mold, a mold lid opening/closing machine that opens and closes the mold lid of the mold, and a demolding machine that demolds the molded product from the mold. A molding apparatus for synthetic resin dolls, etc., which is equipped with a robot mechanism section movable so that each machine faces the molding die, wherein the mold holding mechanism section is It has a heating furnace, a drive mechanism that rotates between the robot mechanism section and the cooling chamber, and a rotatable conveyor table on a base, and a stop/start control for the drive mechanism is provided at the rotation stop position of the conveyor table. 1. A molding device for synthetic resin dolls, etc., characterized by having a detection section for use in the production of synthetic resin dolls.