JPH04443B2 - - 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 molds, the injection of raw materials, the opening and closing of the mold lid, the heating process, the cooling process, and the demolding process were performed manually. 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 the continuous and automated molding technology to solve the problem of not being able to do so, and to solve problems in demolding of molded products in particular, thereby providing 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. , a pair of chuck saws to which the demolding machine is pivotally attached with a pin; a cylinder having a slidably slidable piston connecting each chuck saw with a pin; and a support shaft portion in which the cylinder is rotatably mounted on a mounting plate. , a plurality of chucking parts each consisting of a pinion fixed to a support shaft are arranged in parallel in correspondence with the molding mold, and the chuck saw is movable up and down in the molding mold with a cylinder having a mounting plate; This is an apparatus for molding synthetic resin dolls, etc., characterized in that a cylinder is provided on a rack that engages with each pinion and is reciprocated via a rack pushing plate.

〔Example〕

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

This molding device for synthetic resin dolls, etc. includes an automatic control mechanism section, a mold holding mechanism section, a mold lid opening/closing machine that opens and closes the mold lid, and a molded product from the mold. It consists of a robot mechanism section that includes a demolding machine for demolding, a demolding leak detection and cleaning machine, and a raw material injection machine, a heating mechanism section, and a cooling mechanism section. That is, the molding apparatus includes a mold holding mechanism section A of a molding die (hereinafter referred to as a mold), a heating furnace B as a heating mechanism section,
It consists of cooling chambers C and C as the cooling mechanism, and a robot mechanism D that performs everything from injecting raw materials into the mold to taking out the molded product, and each work is automatically controlled by the control panel E of the automatic control mechanism. It's getting old.

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. A mold lid opening/closing machine 600 as a mechanism, a demolding machine 700 as a demolding mechanism, a demolding leak detection and blowing machine 800 as a demolding leak detection and cleaning mechanism, a raw material injection machine 900 as a raw material injection mechanism, and these It is comprised of a support machine 500 as a support mechanism that suspends and holds each machine.
[See FIGS. 1 and 2] The mold holding mechanism section A includes a rotary table 101.
It is formed by attaching a mold 200 to the tip of an arm 102 provided above via a rotating plate spider 117. [See FIG. 3] 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 and an inner shaft, which are connected to geared motors 111 and 112 with brakes, respectively, and an orthogonal shaft orthogonal shaft perpendicular to the arm 102, that is, a spider spindle 113 is attached to the tip of this arm 102. However, the spider spindle 113 is connected to an inner shaft and an outer shaft, and can rotate around the axis of the spindle 113 ("rotation") and around the axis of the arm 102 ("revolution").

Rotating 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.

A rotary table 101 is provided on the base 103, and a limit switch 118 is provided so that the mold 200 group can be stopped at three positions: a raw material injection/removal position, a heating position, and a cooling position, and is stopped by the brake operation of the motor 107.・It is set to be locked.

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.

For example, ten molds 200 are lined up and fixed to a frame 201, and four pieces of the frame 201 are lined up and fixed to a mounting plate 202 in parallel. The mounting plate 202 is fixed to the spider 117.

The lid of the mold is provided corresponding to the arrangement of the mold 200.

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.

The burner 303 uses a downward combustion propane gas burner, and the furnace is equipped with temperature detectors for automatic temperature control, temperature recording, and temperature digital display, and the temperature can be automatically controlled and the heating time It is also controlled by a timer.

Note that the openings of the notches 301, 301 are closed when the heating furnace B is in operation, and the opening and closing of the door 302,
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.

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 gradual cooling by combining water cooling and air cooling. An exhaust fan 404 is provided to exhaust hot air and steam generated by cooling.

The operating time of the nozzle and fan 403 is controlled by a timer, and the shutter 40
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 Figures 2 and 3] The support device 500 has an arm 502 having an index portion 501 at its tip and is rotatably connected to a column 503, and each of the devices 600, 700, 800, and 900 provided on the index portion 501 is attached to a metal plate. It brings you closer to the mold position.

That is, the arm 502 has the shaft 50 on the lower surface of one end.
4 and a gear 505 concentric with the shaft 504 are fixedly attached, and the shaft 504 is rotatably inserted into the hollow part of the column 503 and connected to the column 503. A pinion 506 that meshes with the gear 505 is provided at the top of the column 503 and connected to a geared motor 507 with a brake.

Further, a pin hole is formed in the lower surface of the gear, and a lock pin that penetrates into the pin hole is provided at the upper part of the column 503. This locking pin is attached to the tip of the piston of the cylinder, and the cylinder to which the column 503 is fixed is connected to a source of working fluid pressure.

The index portion 501 is attached to the tip of the arm 502 via a cylindrical column 511 fixed to the tip. A shaft is rotatably supported in the hollow part of the column 511, and a gear is attached to the circumferential surface of the lower end of the shaft exposed from the column 511, and four support arms are fixed to the lower end radially around the shaft. It is provided.

A pinion is provided on the column 511 in mesh with a gear via a geared motor with a brake fixed to the column 511.

Furthermore, a locking mechanism similar to that between the column 503 and arm 502 described above is provided between the column 511 and the shaft.

At the tips of the four support arms are cylinders 517 ₁ ,
517 ₂ , 517 ₃ , 517 ₄ are provided, respectively, and a mounting flange is fixed to the lower end of each cylinder, and each machine 600 , 700 , 800 , 9 is attached to the mounting flange.
00 are connected so that they can go up and down.

In addition, the mounting flange is equipped with 600, 70 for each of the above machines.
0,800,900 are fixedly suspended in a position convenient for the molding process, and the cylinder 517 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 has means for releasing the engagement between the mold lid and the mold 200 and holding the mold lid.

The demolding machine 700 has end plates 706, 706
Four rows of chuck cylinder mounting plates 70 mounted between
Ten chuck cylinders 702 are hung in each row of 1, and a pair of chuck saws 703, which are clamping pieces, are provided at the lower end of each cylinder 702 to form a catch holder group. It is provided. and two rows of mounting plates 701 in the center.
_a , _701a are fixed to hanging plates 704, 704, and the hanging plates 704, 704 are fixed to the mounting flange 521 (see Figures 4 and 5). Two mounting plates 70 at the top and bottom of
1,701. The end of a chuck saw 703 is pivotally attached to the tip of a piston 717 of the cylinder 702 with a pin 713. In addition, a chuck saw 703 is pivotally attached to the mounting plate at the tip of the cylinder 702 at the center by a pin 712, and the piston 703
The tip chuck portions of the chuck saws 703, 703 are opened and closed by raising and lowering the chuck 17. [See FIG. 8] The mounting plate 701 _a on the center side and the mounting plate 701 _b on the adjacent end side are formed in two rows as a set, and the mounting plate 701 _a of one end plate 706 and the mounting plate 701 Cylinders 707, 707 are provided horizontally between _b . A rack pushing plate 709 is provided at the tip of the piston of the cylinder 707, and racks 708, 70 are provided at both ends of the rack pushing plate 709.
8 are connected. Rack 708, 708 is 1
A set of mounting plates 701 _a and 701 _b are provided on opposing surfaces to mesh with the pinion 711 of the cylinder 702 , and guide plates 71 are provided at several locations on the mounting plate 701 .
0 is provided protrudingly. [See Figures 6 and 7] Two lifting cylinder mounting plates 714 are connected to the upper part of the mounting plate 701 so as to be perpendicular to the mounting plates, and at both ends of the mounting plate 714 there are blocks 71 at the tip of the piston.
A lifting cylinder 715 with 6 is mounted vertically. This block 716 is provided at a position where it can come into contact with the mounting plate 202 to which the mold 200 is mounted.

Note that the cylinders 702, 707, and 715 are also connected to the working fluid pressure device F. [See Figure 8] The demolding leak detection and blowing machine 800 is equipped with a mechanism for detecting molded product demolding leaks in the mold 200 and a mechanism for blowing air inside the mold 200, and the raw material injection machine 900 is used for cleaning. The mold 200 is equipped with a mechanism for injecting raw materials into the finished 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 has been injected into the mold 200 in one of the mold holding mechanism parts _A1 of the mold holding mechanism part A, and 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, and the mold holding mechanism section _A1 is demolded and removed.
Move to material injection position and lock.

First, the mold lid opening/closing machine 600 is positioned and locked on the mold 200 group. Next, the cylinder 517 ₁ lowers the mold lid opening/closing machine 600 and locks the mold lid opening/closing machine, and at the same time, the engagement between the mold 200 group and the mold lid is released, and the cylinder 517 ₁ lowers the mold lid opening/closing machine 600 and locks the mold lid opening/closing machine 600 . The lid opening/closing machine 600 is raised with the mold lid held at the bottom, and the lid opening is completed.

Next, release the lock and rotate the mold 200.
The demolding machine 700 is positioned above the group and locked. Then, the cylinder 517 ₂ lowers the demolding machine 700 to a position where the chuck saws 703 , 703 can grasp the molded product at the opening of the mold 200 . At that time,
The chuck saw 703 is in an open state due to the cylinder 702, but next, the chuck saws 703, 703 are closed using the cylinder 702 to pinch the molded product. After pinching, cylinder 707
02 is rotated and the cylinder 715 is actuated, the chuck saws 703, 703 are rotated and raised, and the molded product is twisted and moved into the mold 200.
pulled out from At the same time as these steps, the demolding machine 700 is also raised by the cylinder ₅₁₇₂ , and the demolding is completed.

Note that the molded product is placed in cylinder 7 on the chute.
02 to open the chuck saws 703, 703 and allow the molded products to fall, and the molded products that do not fall are brushed off with a support rod, collected in a collection box, and guided to the next boiling step if necessary.

Subsequently, the lock is released and rotated to position the demolding leak detection and blowing machine 800 over the group of empty molds 200 and lock it. After demolding, detecting leakage and blowing air, the machine is raised.

Subsequently, the raw material injector 900 is rotated with the lock released, and the raw material injector 900 is positioned above the group of cleaned molds 200 and locked.

Then, the raw material injection machine 90 is moved to a position where the nozzle opening faces the opening of the mold 200 by the cylinder ₅₁₇₄ .
0 is lowered and a plastic sol raw material is injected into the mold 200. After the injection is completed, the injection machine 9
00 and return it to the standby position.

Finally, the lock is released and rotated, and the mold lid opening/closing machine 600 holding the mold lid is positioned below.
It is lowered by cylinder ₅₁₇₁ . After the mold 200 is closed, the machine is raised.

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 is an apparatus for molding synthetic resin dolls, etc., which includes a pair of chuck saws to which a demolding machine is pivotally connected by a pin, a cylinder slidably equipped with a piston in which each chuck saw is connected by a pin, and The chucking part consists of a spindle part where the cylinder is rotatably mounted on the mounting plate, and a pinion fixed to the spindle part.
A plurality of chuck saws are installed in the mold in parallel in correspondence with the molding mold so that they can be raised and lowered using a cylinder with a mounting plate, and the chuck saws are reciprocated by means of a pusher plate that engages with each of the pinions. By installing a moving cylinder, demolding of a large group of molding molds can be done all at once, and the molded product inside the molding mold can be peeled off efficiently, and the molded product can be taken out from the mold extremely smoothly. A device that can be used to automatically extract molded products from thermoplastic synthetic resin molding without requiring manual labor, with fewer errors in ejecting and increasing operating rates without requiring labor, and with simple operation control. It is possible to improve work efficiency by automating rotation molding equipment, 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; FIG. 1 is a perspective view of the state in use, FIG. 2 is a plan view thereof, FIG. 3 is a side view of a part thereof, FIG. 4 is a front view, and FIG. Its plan view, FIG. 6 is a cross-sectional view along the line of FIG. 5, FIG. 7 is a cross-sectional view along the line of FIG. 5, and FIG. 8 is a cross-sectional view along the line of FIG. 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, 111,112...Motor, 1
13... Spider spindle, 117... Spider, 200... Mold, 201... Frame, 20
2... Mounting plate, 301... Notch, 302... Door, 303... Burner, 304... Circulation fan,
401... Notch, 402... Shutter, 403...
...Fan, 404...Exhaust fan, 405...Motor, 500...Support machine, 501...Index section, 502...Arm, 503...Column, 51
1...Column, 521...Mounting flange, 600
...Mold lid opening/closing machine, 700...Mold removal machine, 701
...Chuck cylinder mounting plate, 702...Chuck cylinder, 703...Chuck saw, 704...
...Hanging plate, 706... End plate, 707...
... Cylinder, 708 ... Rack, 709 ... Rack push plate, 710 ... Guide, 711 ... Pinion, 712, 713 ... Pin, 714 ... Lifting cylinder mounting plate, 715 ... Cylinder, 716 ...
...Block, 717...Piston, 800...Mold removal leak detection and blowing machine, 900...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 device for synthetic resin dolls, etc., which is equipped with a robot mechanism section that is movable so that each machine faces the molding die, wherein the demolding machine is pivotally mounted with a pin. It consists of a pair of chuck saws, a cylinder that is slidably equipped with a piston that connects each chuck saw with a pin, a support shaft with the cylinder rotatably mounted on a mounting plate, and a pinion that is fixed to the support shaft. A plurality of chucking parts are arranged in parallel in correspondence with the molding molds, and the chucking saw is provided in the molding mold so as to be able to be raised and lowered by a cylinder having a mounting plate, and a pushing plate is provided that can be easily engaged with each of the pinions. An apparatus for molding synthetic resin dolls, etc., characterized by being provided with a cylinder that is reciprocated through a cylinder.