JPH0248416B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic manufacturing 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 provides an apparatus for molding synthetic resin dolls and the like by automatically injecting raw materials into a plurality of molding molds, molding, and releasing the molds. The column 511
An index section 501 consisting of a plurality of support arms 514 provided radially is disposed rotatably, and each support arm 514 is equipped with a mold lid opening/closing machine 600, a demolding machine 700, and a demolding leak detection/blowing machine 800. , and a raw material injection port 900, each of which is movable up and down, and a plurality of blowing nozzles 802 that eject purifying fluid prior to injecting raw materials into the plurality of molding molds 200 opened by the mold lid opening/closing machine 600. and a detection pin 803 that detects the remaining molded product in the molding die 200.
The demolding leak detection and blowing machine 800 is constructed by having a frame 808 that can be raised and lowered so as to face near the mouth of the molding die 200, and the blowing nozzle 802 is This is a mold purification device for a molding machine for synthetic resin dolls, etc., characterized in that it is connected to a purification fluid injection source.

〔Example〕

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

The molding machine consists of mold holding mechanism parts A and A of the molding die (hereinafter referred to as the mold), heating furnace B as the heating mechanism part, cooling chambers C and C as the cooling mechanism part, and raw material injection into the mold. It consists of a robot mechanism section D that handles everything up to the removal of the molded product, and a control panel E of the automatic control mechanism section.
Each task is now automatically controlled.

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 mold removal machine 700 as a mold removal mechanism, and a mold removal leak detection and blowing system as a mold removal leak detection and cleaning mechanism, which is a mold cleaning device equipped with a molded product residual detector. 800, a raw material injection machine 900 as a raw material injection mechanism, and a support machine 500 as a support mechanism that suspends and holds each of these machines.

[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 provided on the rotary table 101, and the arm 102 is a double shaft arm consisting of an outer shaft and an inner shaft, and is connected to geared motors 111 and 112 with brakes, respectively. The arm 10 is located at the tip of the arm 102.
2 orthogonal axis, that is, the spider spindle 11
3 is installed, but the spider spindle 113
is connected to the inner and outer shafts, and rotates about the axis of the spindle 113 (“rotation”), and also rotates the arm 10.
Rotation (“revolution”) about two axes 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.
A limit switch is provided so that it can be stopped at three locations: the raw material injection and demolding position of the 00 group, the heating position, and the cooling position, and is stopped and locked by the brake operation 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.

Ten molds 200 are fixed in a row to a frame 201, and four molds 200 are 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 and has a structure that can be opened and closed.

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 slow 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.

The support machine 500 has an arm 502 having an index part 501 at its tip, which is rotatably connected to a column 503, and allows the machines 600, 700, 800, and 900 provided in the index part 501 to face the mold position. .

That is, the arm 502 has a shaft and a gear concentric with the shaft fixedly attached to the lower surface of one end, and the shaft is rotatably inserted into the hollow part of the column 503 and connected to the column 503. A pinion that meshes with the gear is provided at the top of the column 503 and connected to a geared motor 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 fixed to column 503 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 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. It is fixedly installed.

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.

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 position convenient for the molding process, and the cylinder is connected to a working fluid pressure device including a hydraulically operated 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 a means for releasing the engagement between the mold lid and the mold 200 and holding the mold lid, and the mold removing machine 700 has a configuration for grabbing the molded product in the mold 200. It is something that

The demolding leak detection and blowing machine 800 consists of a blowing part with 10 nozzles 802 provided on each of four header pipes 801 and a demolding leak detection part with a detection pin 803, and a nozzle 802 that spouts cleaning fluid.
and one detection pin 803 are provided for one mold 200. (See Figures 4 to 6) The header pipe 801 is a pipe with both ends closed, and the header pipe _801a in the inner row and the header pipe _801b in the outer row adjacent to each other are connected to a T-shaped header supply pipe 804 in the center. connected,
One set is connected to a cleaning fluid injection source, that is, a pressurized gas supply device for air blowing, and the blowing is performed alternately by one set at a time. This header pipe 801 is supported via a header bar 807 on a hanger seat plate 806 suspended from a hanger 805, and the hanger 805 is suspended from the mounting flange 521 via a frame 808.

The demolding leak detection section is provided below the middle of the header pipe _801a and the header pipe _801b .

The detection pin 803 is an L-shaped pin, and the nozzle 802
The shaft 810 with its tip extended downward
is fixed to. Five sets are fixed to one shaft 810, and eight sets are used depending on the arrangement of the mold 200.

The shaft 810 is rotatably supported by eight shaft mounting plates 811, and the shaft mounting plates 811 are suspended from a limit switch mounting plate 812, and the limit switch mounting plate 812 is connected to a frame 808 and a hanger 805.
The bolts connecting the two are extended and supported by the bolts.

One limit pusher 813 for each shaft 810
The limit switch mounting plate 812 is provided with a hole 814 through which the pusher 813 projects. This hole 814 has a size that allows the pusher 813 to swing, and a bolt 815 is provided in the hole 814 to restrict the swing range. A limit switch 816 is provided on the limit switch mounting plate 812 at a position where it can come into contact with and separate from the pusher 813 by swinging the pusher 813. And the pusher 813 is the detection pin 803
It has a moment in the direction away from the limit switch 816 due to the gravity of the bolt 815, and is set to remain stationary while in contact with the bolt 815.

Note that the limit switch 816 is connected to a stopping device for subsequent work and an alarm generating device.

Further, the blow time and the blow switching between the two groups of blow sections are controlled by a timer.

The raw material injector 900 has a mechanism for injecting a sol raw material into the cleaned mold 200, and is connected to the raw material feeder.

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 shaft is rotated by a motor and the mold 2
Place the mold lid opening/closing machine 600 on the 00 group and lock it. Next, the mold lid opening/closing device 600 is lowered by the cylinder ₅₁₇₁ to disengage the mold from the mold lid, and then the lid is held and raised to complete the lid opening.

Next, the shaft is unlocked and rotated, and the demolding machine 700 is positioned above the group of molds 200 and locked. Then, the demolding machine 700 is lowered by the cylinder 517 ₂ to grip the molded product, and then the demolding machine 700 is raised.

Subsequently, the shaft is unlocked and rotated to remove the mold leakage detection and blowing machine 800 from the empty mold 200.
Position it above the group and lock it. and cylinder 5
17 ₃ , the detection pin 803 is lowered to a position where it collides with the molded product if there is a molded product in the mold 200. In that case, if the molded product remains in the mold 200, the detection pin 803 collides with the molded product, causing the shaft 810 to rotate so that the limit pusher 813 comes into contact with the limit switch 816, and the next operation is stopped by the limit switch 816. , the molded product will be removed manually or by other means in response to an alarm such as a buzzer.

Further, compressed air is alternately blown into the mold 20 from the nozzle 802 by a timer, for example, for each set.
0 is cleaned. After cleaning cylinder 517 ₃
The aircraft will rise.

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

After injecting the sol-like raw material into the mold 200, the injection machine 900 is raised and returned to the standby position.

Finally, unlock the shaft and rotate it.
After positioning and lowering the mold lid opening/closing machine 600 holding the mold lid below and closing the mold 200,
raise.

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 provided with a mold lid opening/closing machine, a demolding machine, a demolding leak detection/blowing machine, and a raw material inlet, each of which is movable up and down on each support arm of the index section, and the mold lid opening/closing machine is equipped with a mold lid opening/closing machine. A plurality of blowing nozzles that eject cleaning fluid prior to injecting raw materials into the plurality of molding molds whose lids are opened, and a detection pin that detects residual molded products in the molding molds are connected to the mouths of the molding molds. A demolding leak detection and blowing machine is constructed on a frame that can be raised and lowered so that it can be seen near the part, and the blowing nozzle is placed in communication with the purification fluid injection source via the distribution part. , demolding work,
The molding operation of heating and cooling can be carried out continuously and accurately, and the inside of the mold is always purified, and the presence or absence of residual molded products can be easily detected after demolding, allowing extremely good molding processing to be performed safely without any problems. Each working part has a rotation mechanism, making it compact and eliminating loss of working time. We provide a device that can automatically clean molds in thermoplastic synthetic resin molding without requiring human labor. 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, in which 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 an illustration of a demolding leak detection and blowing machine. A plan view, FIG. 5 is a cross-sectional view taken along the line shown in FIG. 4, and FIG. 6 is a cross-sectional view taken along the line shown in FIG. A...Mold holding mechanism section, B...Heating furnace, C...
Cooling room, D... Robot mechanism section, E... Control panel,
101...Rotary table, 102...Arm, 1
03... Base, 104... Track, 105... Roller, 106... Fulcrum pin, 107... Motor, 1
08...Pinion, 109...Rack, 111,
112...Motor, 113...Spider spindle, 117...Spider, 200...Mold, 20
1... Frame, 202... Mounting plate, 301...
Notch, 302...Door, 303...Burner, 30
4... Circulation fan, 305... Exhaust fan, 40
1... 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, 521...
...Mounting flange, 600...Mold lid opening/closing machine, 70
0...Mold demolding machine, 800...Mold removal leak detection and blow machine, 801...Header pipe, 802...Nozzle, 803...Detection pin, 804...Header supply pipe, 805...Hanger, 806...Seat board, 8
07... Header bar, 808... Frame, 8
10... Shaft, 811... Shaft mounting plate, 812... Limit switch mounting plate, 813... Limit pusher, 814... Hole, 815... Bolt, 816
...Limit switch, 900...Raw material injection machine.

Claims (1)

[Claims] 1. In an apparatus for molding synthetic resin dolls, etc. by automatically injecting, molding, and releasing raw materials into a plurality of molding molds, a column 511 is rotatably provided on a support via an arm 502, and the column 511 An index unit 501 consisting of a plurality of support arms 514 provided radially is provided rotatably, and each support arm 514 is equipped with a mold lid opening/closing machine 600 and a mold removing machine 70.
0, a demolding leak detection and blowing machine 800, and a raw material injection port 900, each of which is movable up and down, and a plurality of molds 200 whose lids are opened by the mold lid opening/closing machine 600.
A plurality of blowing nozzles 802 eject cleaning fluid prior to injecting raw materials into the mold 200 .
The demolding leakage detection and blowing machine 800 is configured such that a detection pin 803 for detecting the remaining molded product inside the mold is provided on a frame 808 so as to be able to be raised and lowered so that the detection pins 803 are respectively exposed near the mouth of the molding die 200. A mold cleaning device for a molding machine for molding synthetic resin dolls, etc., characterized in that the blowing nozzle 802 is arranged in communication with a cleaning fluid injection source through a distribution section.