JPH05212761A - Molded product arranging and dropping mechanism - Google Patents

Abstract

PURPOSE:To smoothly guide a molded product by providing mutually separated grooves whose number corresponds to the kind of the molded product to the guide rail dropping and guiding the molded product ejected from a mold. CONSTITUTION:In an injection molding machine molding molded products such as the upper and lower shells of a microfloppy disk, an arranging and dropping mechanism 28 guiding the molded products downwardly in an arranged state to move them is arranged between molds 26 or under said molds. The arranging and dropping mechanism 28 has guide rails 44, 46 vertically provided on both sides of lower and upper shell molding parts 40, 42 of each set arranged on the same vertical line. A first groove 56 having a width dimension having length over the whole of each of the guide rails and slightly larger than the thickness of each shell and bent on the way thereof and a second groove 58 extending from the position near to the lower part of each of the guide rails to the lower end part thereof are formed to each of the guide rails to drop and guide the shells.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for aligning and dropping a molded product used for taking out a molded product such as a shell constituting a casing of a micro floppy disk (hereinafter referred to as "MFD" in this specification). It is about.

[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. However,
In the conventional device as described above, 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 the molding process. In addition to this, since the suction unit of the robot apparatus needs time to move in and out, the cycle time required for molding becomes long.

[0003]

In order to solve the above-mentioned problems, it is possible to provide guide rails with grooves in a molding die, guide the both sides of the molded article by the grooves and drop the molded article by its own weight. Conceivable. In this case, since the upper shell and the lower shell are guided by the same groove, the following problems occur. That is, when the width of the groove is not sufficiently large compared with the thickness of the shell, the shell is caught in the middle and does not fall smoothly. On the contrary, if the width of the groove is too large, the shell that has fallen later overlaps with the shell that has fallen first, and the shell will be clogged in the groove, and it will not be possible to smoothly drop the shell one after another. Even if the shell drops in a predetermined manner, a mechanism is required to separate the shell that drops first and the shell that drops later. The present invention aims to solve such problems.

[0004]

The present invention solves the above problems by providing a plurality of independent grooves in a guide rail. That is, the aligning and dropping mechanism of the molded product according to the present invention is such that a molded product ejected from a molding die for simultaneously molding two or more kinds of molded products having different shapes at the same vertical position is provided with guide rails on both sides thereof. If the guide rail has a number of grooves separated from each other corresponding to the type of molded product, the groove is separated from the eject position It is characterized in that it has a length reaching the lower end of the guide rail and a width larger than the thickness dimension of each molded product.

[0005]

FUNCTION The molded product molded by the molding die is ejected and supported by the guide rail. That is, both sides of the molded product are guided by the groove of the guide rail. The moldings are guided individually by the corresponding grooves. When the molded product is released in this state,
The molded product falls along the groove due to its own weight. From the lower end of the guide rail, the molded product is separated by each groove and sent out.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall construction of an apparatus for molding and assembling an MFD shell. The injection molding machine 10
Bed 12 and injection device 14 placed on top of it
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. Mold 2
An alignment drop mechanism 28 for guiding and moving the molded product in a downward aligned state is arranged between 6 and below this.
Further, an assembly mechanism 30 is 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 each of the lower shell molding portion 40 and the upper shell molding portion 42 arranged on the same vertical line. Guide rails 44 and 46
On the side facing each other, as shown in FIG.
Although the groove 56 and the second groove 58 are provided, they are not shown in FIG. 2 because they are too fine in FIG. The three guide rails 44 are common guide rail drive fittings 48a,
It is connected to 48b. Guide rail drive bracket 4
8a and 48b are provided so as to be movable in the horizontal direction with respect to the movable mold 24. Guide rail drive fitting 48a,
A spring (not shown) constantly applies a force to the guide rail 48b so as to move the guide rail 44 toward the guide rail 46. 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 a driven cam member 54 is provided at the corresponding positions of the guide rail drive fittings 48a and 48b. The driven cam member 54 is integrally connected to the guide rail drive fittings 48a and 48b. Drive cam member 52 and driven cam member 54
Guide rail drive fittings 48 when inserted together
a, 48b is expanded outward by the drive cam member 52,
It is shaped so as to generate the action of moving it 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. First
The basic width dimension of the groove 56 is slightly larger than the thickness dimension of the lower shell. In addition, the width dimension is large in the bent portion of the first groove 56. This is to move the lower shell smoothly. 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 left 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.
The receiving guide member 60 and the assembly mechanism 30 arranged below the guide rail 46 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 has two grooves 62 and 64 arranged at the same intervals as the two grooves 56 and 58 of the guide rails 44 and 46. 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 guide rail of the aligning and dropping mechanism is provided with the plurality of grooves for individually guiding the molded products ejected from the molding die. The molded products are not caught or overlapped on the way, and the molded products can be reliably delivered in a separated state. Therefore, a mechanism for separating a plurality of molded products is also unnecessary.

[Brief description of drawings]

FIG. 1 is a diagram showing an entire apparatus to which an alignment drop mechanism of the present invention is applied.

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 56 first groove (groove) 58 second Groove (groove) 96 Upper shell (molded product) 98 Lower shell (molded product)

Claims (1)

[Claims] 1. Two or more types of molded articles having different shapes (96,
Molded articles (96, 9) ejected from a molding die (26) for simultaneously molding (98) on the same vertical line position.
8) Guide rails (44, 46) on both sides of these
In the aligning and dropping mechanism of the molded product, which is guided by and dropped by its own weight, the guide rails (44, 46) include the molded products (96, 98).
The number of grooves (56, 5) separated from each other corresponding to the type of
8), and the grooves (56, 58) are formed in each molded product (9
6, 98) from the eject position to the guide rail (44,
46) the length to reach the lower end and each molded product (96, 9
A mechanism for aligning and dropping molded products, which has a width larger than the thickness dimension of 8).