JPH05212744A - Molding and assembling method and apparatus - Google Patents

Abstract

PURPOSE:To reduce the space necessary for taking out and assembling a molded product when it is necessary to mutually assemble two or more parts molded by an injection molding machine and shorten a cycle time. CONSTITUTION:The molded products molded by a mold 26 are guided downwardly under gravity by an arranging and dropping mechanism 28 to be moved and assembled by the assembling mechanism 30 arranged under the arranging and dropping mechanism 28 and the assembled product is fed by the feed device 32 arranged in a bed 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding / assembling method and apparatus used for molding and assembling a shell or the like constituting a casing of, for example, a micro-floppy disk (hereinafter referred to as "MFD" in this specification). It is a thing.

[0002]

2. Description of the Related Art The molding and assembly of a shell of an MFD casing is conventionally performed as follows. That is, the upper shell and the lower shell of the MFD are simultaneously molded by the injection molding machine, these are taken out of the injection molding machine by the robot hand, and the upper shell and the lower shell are installed in the assembly device arranged adjacent to the injection molding machine. Combine with and carry these out to a stocker.

[0003]

However, in the conventional molding / assembling method and apparatus as described above, a robot apparatus for carrying out the shell to the side of the injection molding machine, an assembling apparatus for shell assembling, and Has a problem in that it is necessary to dispose a conveyor or the like for conveying the assembly, and a large installation space is required for disposing the entire apparatus.
Further, in the conventional molding / assembling method and device, since the shell is taken out from the mold by the robot device, it is necessary to open the mold as much as possible so that the suction part of the robot device can move in and out after molding. The time is long, and in addition to this, it is necessary for the suction unit of the robot apparatus to move in and out, so the cycle time required for molding is long. The present invention aims to solve such problems.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above problems by dropping a molded product to an assembly mechanism arranged below a mold and disposing a conveying device in a bed of an injection molding machine. That is, in the molding / assembling method according to the present invention, two or more molded products having different shapes are simultaneously molded by an injection molding machine, and the two or more molded products thus formed are aligned and dropped downward by gravity and then dropped. It is composed of a series of steps of immediately assembling two or more molded products which have been made, carrying the assembled product in the bed of the injection molding machine, and taking it out from one longitudinal end of the bed. Further, the molding / assembling apparatus according to the present invention includes an injection molding machine including an injection device and a mold clamping device provided on a bed, and a cavity that is attached to the mold clamping device and simultaneously molds two or more molded products having different shapes. A molding die having the above, an aligning and dropping mechanism for dropping the two or more molded products formed by the molding die by gravity in an aligned state, and the above-mentioned 2 sent by the aligning and dropping mechanism.
It has an assembly mechanism for assembling the above-mentioned molded products with each other, and a transport device for transporting the assembled product assembled by the assembly mechanism. The assembly mechanism is disposed below the molding die, and the transport device is disposed in the bed. Then, the unloading part of the assembly from the transfer device is arranged at one longitudinal end of the bed.

[0005]

The function of the molded product molded by the mold is downward due to gravity in the aligned state by the aligning and dropping mechanism.
The assembling mechanism assembles the dropped molded products by, for example, overlapping and pressing them in a predetermined posture. The assembled product is moved in the bed by the transfer device and transferred to one end of the bed. For example, a stocker is arranged at one end of the bed, and the assembly is stored in the stocker.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall structure of a molding / assembling apparatus. The injection molding machine 10 includes a bed 12, an injection device 14 arranged on the upper surface of the bed 12, and a mold clamping device 16. A fixed die 22 and a movable die 24 are attached to the fixed board 18 and the movable board 20 of the mold clamping device 16, respectively. The fixed mold 22 and the movable mold 24 form a molding die 26. An aligning and dropping mechanism 28 for guiding and moving the molded products in a downward aligned state is arranged between the molding dies 26 and below the molding dies 26, and an assembling mechanism 30 is further arranged below this. A transfer device 32 is arranged inside the bed 12 below the mold clamping device 16. The transport device 32 can carry out the assembly assembled by the assembly mechanism 30 to the left end of the bed 12 in FIG. 1.

Molding and assembly using the apparatus shown in FIG. 1 are performed as follows. The mold die 26 is clamped by the mold clamping device 16, and the molten resin is injected from the injection device 14 into the cavity. Next, the mold is opened, and the upper shell and the lower shell of the MFD, which is a molded product, are projected by the ejecting device and guided downward by the aligning and dropping mechanism 28. One shell is turned upside down by the assembly mechanism 30, and the upper shell and the lower shell are assembled together. The assembled assembly is transported by the transport device 32 and stored in the stocker 34 arranged at the end of the bed 12.

Next, the molding die 26 and the aligning drop mechanism 28.
Will be described in detail with reference to FIG. As described above, the movable mold 24 is attached to the movable plate 20 and the fixed mold 22 is attached to the fixed plate 18. The molding die 26 is provided with a total of 6 cavities, that is, three lower shell molding portions 40 and three upper shell molding portions 42. The lower shell molding portions 40 are provided at predetermined intervals in the horizontal direction, and the upper shell molding portions 42 are provided below each of the lower shell molding portions 40. Guide rails 44 and 46 are vertically provided on both sides of the lower shell molding portion 40 and the upper shell molding portion 42 of each set.
The guide rails 44 and 46 have a first groove 56 and a second groove 58 on the sides facing each other as shown in FIG. 3, which will be described later, but they are not shown in FIG. 2 because they are too fine. is there. The three guide rails 44 are connected to common guide rail drive fittings 48a and 48b. The guide rail drive fittings 48 a and 48 b are provided so as to be movable in the horizontal direction with respect to the movable die 24. The guide rail 44 is attached to the guide rail drive fittings 48a and 48b by a spring (not shown).
The force to move in 6 directions is always acting. On the other hand, a force for moving the guide rail 46 in the direction of the guide rail 44 always acts on the guide rail 46. The fixed mold 22 side is provided with a burr groove 50 for receiving the guide rail 44 and the guide rail 46 when the mold is closed. A drive cam member 52 is fixed to the upper surface of the fixed die 22, while the guide rail drive metal fittings 48a, 48 are provided.
A driven cam member 54 is provided at a corresponding position of b. The driven cam member 54 is a guide rail drive fitting 48.
It is connected to a and 48b. The drive cam member 52 and the driven cam member 54 have such a shape that when they are inserted into each other, the guide rail drive fittings 48a and 48b are expanded outward by the drive cam member 52 and generate an action of moving in the horizontal direction.

FIG. 3 shows a vertical sectional shape of the guide rail 44 parallel to the mold axis. The guide rail 44 is provided with a first groove 56 and a second groove 58. As shown in FIG. 4, the first groove 56 and the second groove 58 are open on the side facing the guide rail 46. The first groove 56 is provided from the upper end to the lower end of the guide rail 44. First groove 56
3 is located closer to the left side of the guide rail 44 in FIG. 3 on the upper side, but is bent midway and is located closer to the right side of the guide rail 44 on the lower end side of the guide rail 44. In addition, the width dimension is large in the bent portion of the first groove 56. The basic width dimension of the first groove 56 is slightly larger than the thickness dimension of the lower shell. On the other hand, the second groove 58 extends from the lower position of the guide rail 44 to the lower end. The second groove 58 extends vertically without bending. The distance of the second groove 58 from the left surface of the guide rail 44 is the same as the distance from the upper right surface of the first groove 56. The width dimension of the second groove 58 is also slightly larger than the thickness dimension of the upper mold shell to be molded. The guide rail 46 is basically the same as the guide rail 44, except that the groove faces the guide rail 44 side.

Next, the guide rail 44 of the aligning and dropping mechanism 28 is used.
And a portion below the guide rail 46 and the assembly mechanism 3
0 will be described with reference to FIG. A receiving guide member 60 is provided below the position where the guide rails 44 and 46 stop in the mold open state (the position shown by the solid line in FIG. 5, the imaginary line shows the mold closing position). The receiving guide member 60 includes two grooves 56 and 5 of the guide rails 44 and 46.
It has two grooves 62 and 64 arranged at intervals similar to those in FIG. A discharge chute 66 is attached to the side of the receiving guide member 60. A receiving shutter 68 is provided below the groove 62 of the receiving guide member 60. The receiving shutter 68 moves in the horizontal direction and can open and close the lower end side of the groove 62. The receiving guide member 60 can move between a position shown in FIG. 5 and a position to the left of this, together with a rotation guide device 70 described later.

A rotation guide device 70 is provided below the receiving guide member 60. The rotation guide device 70 is
It has a rotary plate 72 rotatable about a horizontal axis, a guide guide member 74 attached to the rotary plate 72, and a temporary fixing device 76. The rotary plate 72 is rotationally driven by a drive mechanism (not shown) and can be stopped at the position shown and a position rotated 180 degrees from this position. The guide guide member 74 has a groove 78 similar to the guide rails 44 and 46.
And 80. A stopper 81 is provided below the groove 80.
Is provided. The temporary fixing device 76 can fix and release the lower shell 98 located in the groove 80. That is, the temporary fixing device 76 inserts its plunger 76a into the groove 8
It is possible to prevent the lower shell 98 from falling when the rotary plate 72 is rotated 180 degrees by making it plunge into 0. Below the rotation guide device 70, the assembly mechanism 3
A coalescing mechanism 31 forming a part of 0 is arranged. The coalescing mechanism 31 has two grooves 84 and 86 separated by a separation guide 82. As shown in the plan view of FIG. 6, the combination mechanism 31 includes a combination plate 87, an assembly pusher 88, the above-described separation guide 82 and a combination guide 89, whereby the upper shell 96 and the lower shell 98 are provided. It is possible to position and to apply a pressing force between the two. At the lower end side of the combination mechanism 31, a carry-out shutter 90 that can open and close the combination mechanism 31 is provided. A carry-out shooter 92 and a defective product shooter 94 are provided below the combination mechanism 31. A transport device 32 (conveyor) is provided below the carry-out shooter 92.

Next, the operation during molding and assembly will be described in detail. First, from the mold open state shown in FIG.
6, the mold clamping operation is performed, and the movable platen 20 is fixed to the stationary platen 18.
Move in the direction. As a result, the movable mold 24 is brought into close contact with the fixed mold 22, and the mold is clamped. In this state, the molten resin is injected from the injection device 14 to the lower shell molding portion 40 and the upper shell molding portion 42. In this mold clamping state, the drive cam member 52
Comes into contact with the driven cam member 54 to move the guide rail drive fittings 48a and 48b in the groove opening direction. When molding is completed and the movable platen 20 is retracted to a predetermined position, the ejector is activated, and the molded product (the upper shell 96 and the lower shell 9 is
8) is ejected, and at the same time, the drive cam member 5
The contact between 2 and the driven cam member 54 is released, and the guide rail 44 moves in the direction of the guide rail 46, that is, the direction in which the molded product is sandwiched. As a result, the lower shell 98 formed on the upper side of the mold is guided by the first groove 56, while the upper shell 96 formed on the lower side of the mold is formed in the second groove 5.
It will be in the state guided by 8. When the lower shell 98 and the upper shell 96 are sandwiched by the guide rails 44 and 46 in this manner, the ejector returns to the initial position, and the lower shell 98 and the upper shell 96 are free. Therefore, the lower shell 98 and the upper shell 96 are lowered by gravity along the first groove 56 and the second groove 58, respectively. The upper shell 96 that has fallen to the lower ends of the guide rails 44 and 46 enters the groove 62 of the receiving guide member 60, and is prevented from further falling by the receiving shutter 68 (see FIG. 5). On the other hand, the lower shell 98 passes through the groove 64 of the receiving guide member 60, and the rotation guide device 70
It enters into the groove 80 and is stopped by the stopper 81 at the lower end thereof. When the upper shell 96 and the lower shell 98 respectively drop to this position, this is detected by a sensor (not shown). Based on this signal, the injection molding machine 10 starts the next molding cycle. When the receiving guide member 60 and the rotation guide device 70 receive the upper shell 96 and the lower shell 98, respectively,
The receiving guide member 60 and the rotation guide device 70 move leftward in FIG. 5 to the upper position of the combining mechanism 31 (see FIG. 8), and at the same time, the temporary fixing device 76 operates and the lower shell 98.
Is fixed so that it will not move. Then the rotating plate 72 is 1
Rotate 80 degrees. In this state, the vertical positions of the groove 62 and the groove 78 are aligned. Then, the receiving shutter 68 moves to the opening side, and the temporary fixing device 76 operates to the releasing side.
This causes the upper shell 96 to fall into the groove 86, and
The lower shell 98 falls into the groove 84. Next, the uniting mechanism 3
The first combination guide 89 moves to position the upper shell 96 and the lower shell 98. Next, the separation guide 82 moves from the separation position to the release position (see FIG. 6). In this state, the assembly pusher 88 operates to assemble the upper shell 96 and the lower shell 98 (FIG. 7).
reference). Since the lower shell 98 is inverted by the rotation guide device 70, the upper shell 96 and the lower shell 98 are positioned so that their movable mold side molding surfaces face each other. Since bosses and holes for assembling are formed on the movable mold side molding surfaces of the upper shell 96 and the lower shell 98, respectively, when both are pressed by the assembly pusher 88, the bosses and the holes fit together, The upper shell 96 and the lower shell 98 are integrally assembled. When the assembly is completed by the combination mechanism 31, the carry-out shutter 90
Is opened and then the assembly pusher 88 is retracted to drop the assembly, guided by the carry-out shooter 92, and dropped onto the carrier 32. The assembly is carried out of the bed 12 by the carrying device 32.

When it is not appropriate to receive the upper shell 96 and the lower shell 98 due to defective molding, defective operation of the assembly mechanism 30, etc., the discharge chute 66 is positioned below the guide rails 44 and 46 (see FIG. 8). Position), the upper shell 96 and the lower shell 98 are discharged. If the upper shell 96 and the lower shell 98 are not properly received and need to be discharged, the defective shooter 94 can be discharged by switching the defective shooter 94 to the discharging side and opening the carry-out shutter 90.
Further, even when an abnormality occurs in the assembly operation in the assembly mechanism 30, the defective product is discharged through the shooter 94.

[0014]

As described above, according to the present invention, the molded article is dropped below the mold, immediately assembled, and conveyed by the conveying device provided in the bed. Since it is not necessary to install an extra device around, the required space can be greatly reduced. In addition, since the molded product is guided and dropped by the guide rail, it is not necessary to open the mold widely to take out the molded product, and the time required for the robot device to enter and exit is also unnecessary, so the cycle time is greatly reduced. Can be shortened to

[Brief description of drawings]

FIG. 1 is a diagram showing a molding / assembling apparatus of the present invention.

FIG. 2 is a diagram showing a mold and a guide rail.

FIG. 3 is a sectional view of a guide rail.

FIG. 4 is a sectional view taken along line 4-4 of FIG.

FIG. 5 is a diagram showing an arrangement of an alignment drop mechanism and an assembly mechanism.

FIG. 6 is a plan view of the uniting mechanism.

FIG. 7 is a view showing a state in which the pusher for assembling the uniting mechanism is advanced.

FIG. 8 is a view showing a state in which an upper shell and a lower shell are received in the uniting mechanism.

[Explanation of symbols]

 10 injection molding machine 12 bed 14 injection device 16 mold clamping device 18 fixed plate 20 movable plate 22 fixed mold 24 movable mold 26 molding die 28 alignment drop mechanism 30 assembly mechanism 32 transport device 96 upper shell (molded product) 98 lower side Shell (molded product)

Claims (2)

[Claims] 1. Two or more molded products having different shapes are simultaneously molded by an injection molding machine, and the molded two or more molded products are dropped downward by gravity in an aligned state, and the two or more molded products that have fallen. A molding and assembling method in which products are immediately assembled with each other, and the assembled products are conveyed in a bed of an injection molding machine and taken out from one longitudinal end of the bed. 2. An injection molding machine (1) comprising an injection device (14) and a mold clamping device (16) provided on a bed (12).
0), a molding die (26) attached to the mold clamping device (16) and having a cavity for simultaneously molding two or more moldings (96, 98) having different shapes, and a molding die (26). An aligning and dropping mechanism (28) for dropping the two or more molded articles (96, 98) formed by the above in an aligned state by gravity, and the two or more molded articles sent by the aligning and dropping mechanism (28) ( The assembly mechanism (30) for assembling 96, 98) and the assembly mechanism (3
0) and a transport device (32) for transporting the assembled product, the assembly mechanism (30) is arranged below the molding die (26), and the transport device (32) is the bed (12). ), And the carrying-out part of the assembly from the transfer device (32) is located at one longitudinal end of the bed (12).