JP3149317B2 - Automatic loading / unloading insert molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for molding a core material (usually a metal member) automatically carried into a mold into molten metal by insert molding to form an integrally molded product, and furthermore, to automatically carry out the product. The present invention relates to an automatic loading / unloading insert molding machine.

[0002]

2. Description of the Related Art In general, an insert molding machine is configured to inject and mold a molten plastic into a mold in which a core member such as a metal is charged, thereby reducing the number of parts and simplifying an assembling process. It is a production method that demonstrates its power. The conventional insert molding machine is provided with a mold composed of an upper mold and a lower mold having a mating surface in a horizontal direction (horizontal direction). The core material is manually charged into the lower mold, and after the end of the insert molding, It was also configured to manually remove the molded product.

[0003]

The above-mentioned conventional insert molding machine was extremely inefficient because the charging of the core material and the removal of the product were performed manually. In particular, it is difficult to shorten the cycle time for opening and closing the mold, and productivity is not improved. In view of the above, it is an object of the present invention to provide an insert molding machine having means for automatically carrying in a core material and carrying out a product, and capable of greatly reducing a cycle time.

[0004]

In order to achieve the above object, an automatic carry-in / out insert molding machine according to the first aspect of the present invention comprises a fixed mold and a movable mold having a vertical mating surface, and a transfer from a stocker. And a transfer means for loading the fixed core material into the fixed mold, and the fixed mold has a holding means for holding the core material and a transfer means for transferring a product to the movable mold when the mold is opened. Wherein the movable type is the transfer means.
And holding means for receiving and holding the product which has been transferred when the mold is opened, and dropping means for dropping the product when the mold is completely opened.

[0005] In the automatic carry-in / out insert molding machine according to a second aspect of the present invention, the conveying means may be a hand of an XY traveling type robot.
A vacuum or magnetic suction pad and means for rotating the suction pad are provided. In the automatic carry-in / out insert molding machine according to a third aspect, the holding means of the fixed mold and the movable mold is provided with a vacuum suction hole in each mold.

[0006]

According to the first aspect of the present invention, the work of loading the core material into the fixed mold by the transfer means and the work of dropping the product transferred to the movable mold by the drop means are performed simultaneously in parallel. In claim 2, the core material stored in a stacked state is taken out from the uppermost layer by the suction pad of the robot hand.
It is rotated 90 degrees by the rotating means and is inserted into the fixed mold in a vertical posture. In claim 3, the fixed core material and the movable type product are respectively sucked by the vacuum suction holes and held by the respective molds.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment based on the attached drawings. In FIGS. 1 and 2, reference numeral 1 denotes an injection cylinder of the present automatic carry-in / out insert molding machine 100. The injection cylinder 1 can inject molten plastic into a sealed mold 50 via a nozzle touch cylinder 2. It is configured. Reference numeral 3 denotes a hopper for supplying raw material pellets to the injection cylinder 1.

Reference numeral 4 denotes a shooter provided below the opening / closing portion of the mold 50. The shooter 4 drops the product W dropped when the mold 50 is opened.
It can be dropped from the shooter 4 and taken out of the machine. That is, the lower end of the shooter 4 is linked to the belt conveyor 60, and the product W that has slipped off from the shooter 4 is transferred to the conveyor 60 and can be transported to the next step.

The mold 50 is, as shown in FIGS.
It is composed of a fixed mold 51 having a vertical mating surface and a movable mold 52, and holds the core material S inserted in the mold from both sides,
It is configured so that molten plastic can be molded and integrated into the predetermined area. Reference numeral 5 denotes a fixed plate that supports the fixed mold 51, and 6 denotes a movable plate that supports the movable mold 52. As will be described later, the core material S is desirably a member having at least one hole in order to easily realize the transition from the fixed type to the movable type. In this embodiment, two members are provided. An example of a core material S having holes H1 and H2 is shown. However, even if the core material S is a member having no hole, it is possible to suspend the concave portion of the component by a plurality of extrusion pins or to transfer the core material S by a cooperative operation such as vacuum suction or magnetic suction. Therefore, the present invention is not basically affected by the shape of the component.

Next, the configuration of the mold 50 will be described in detail. In the fixed mold 50 and the movable mold 51, 51A and 52A are core material holding regions that only hold the core material S without performing plastic injection, and the core material holding regions 51A and 52A include:
Suspension pins 51C and 52C fitted into the hole H1 of the core material S, suction holes 51E and 52E for sucking the core material S, and extrusion pins 51F and 52F for separating the core material S from the mold are provided, respectively. ing. The suspension pin 51C provided on the fixed mold 51 is urged by a spring B so as to always protrude in the mold open state, and is fitted into the hole H1 of the core material S inserted by the transport means. The core material S can be suspended.

On the other hand, the suspension pin 52C provided on the movable mold 52 is coaxially opposed to the suspension pin 51C of the fixed mold 51, and is fixed so as to always protrude. That is, the suspension pin 52C fits into the hole H1 of the core material S while pressing the suspension pin 51C of the fixed mold 51 so as to be immersed in the fixed mold 51 at the time of mold clamping. As a result, the core material S after molding is suspended by the suspension pins 52C and moved to the movable mold 52 side when the mold is opened.

The suction holes 51E hold the core material S immediately after loading on the fixed mold 51 side, and the suction holes 52E hold the molded core material S on the movable mold 52 side. . The suction holes 51E and 52E can suction the flat surface of the core material S to increase the adhesion between the core material S and the mold. The piping of the suction hole 51E passes through the inside of the back plate 61. If the core material S is a magnetic material, the suction holes 51E and 52E may be replaced by magnetic suction means using an electromagnetic solenoid.

The extrusion pin 51F on the fixed die 51 side is for applying an external force for separating the core material S from the fixed die 51, and is configured to be able to be protruded and retracted by a pneumatic cylinder 51G. That is, the extrusion pin 51F protrudes at the start of mold opening after molding, separates the core material S from the fixed mold 51, and can urge the core material S to move to the movable mold 52 side together with the suspension pin 52C. It has become. On the other hand, the push-out pins 52F, 52F on the movable mold 52 side are erected on a back plate 62 that moves forward and backward by a driving means 63, and are configured to be able to protrude and retract according to the movement of the back plate 62. I have. The extrusion pins 52F, 52F protrude when the mold opening is completed, so that the core material S (product W) can be separated from the movable mold 52 and dropped onto the shooter 4.

Reference numerals 51B and 52B denote molding regions for molding a molten plastic in a predetermined region of the core material S.
The mold regions 51B and 52B are configured so that a predetermined gap can be formed in the core material S. Then, the molten plastic is injected into the space surrounded by the mold regions 51B and 52B so that the core material S and the plastic can be integrated.

Reference numerals 51D and 52D denote protrusions which are fitted into holes in the mold region of the core material S to prevent the inflow of plastic. By opening and closing the mold 50 having the above configuration, insert molding with respect to the core material S can be performed.

Next, means for transporting the core material S will be described. 7 and 8, an index table 71 is provided on a work mounting table 70 disposed behind the insert molding machine 100. The index table 71 further includes a pallet plate 7 on which a core material S is mounted.
3, 73, 73, 73 are arranged every 90 degrees.

Here, each pallet plate 73 is provided with four pallet poles 74, each of which is inserted into the hole H1 of the core material S, and a plurality of core materials S are stacked and stored in each pallet pole 74. . That is, the index table 71
Is configured to be able to feed four core materials S each time it rotates 90 degrees. 72 is a pallet base.

Reference numeral 40 denotes a hand (transporting means).
Numeral 0 is attached to a Cartesian coordinate type arm robot (not shown), and Z direction (vertical direction) and X direction (mold 50).
(Opening / closing direction) to supply the core material S to the mold 50 (however, depending on the arrangement of the work mounting table 70 and the insert molding machine 100, a degree of freedom of movement in the Y direction is also required). Becomes). The hand 40 is provided with four integrated suction pads 41, and the pallet plate 73 is provided.
The four core materials S can be simultaneously vacuum-adsorbed and transported. Here, the suction pad 41 is
The core material S is configured to be able to rotate 90 degrees with respect to 0, and can be converted into a vertical posture (vertical posture) when the core material S sucked in a horizontal posture (horizontal posture) is loaded into the fixed mold 51 of the mold 50. It has become.

Reference numeral 75 denotes a lifter for raising the pallet plate 73, and reference numeral 76 denotes a sensor for confirming a work set (the presence / absence and position of a work). In FIGS. 1 and 2 described above, reference numeral 7 denotes a mold clamping cylinder, and the mold 50 is held by the mold clamping cylinder 7 with a mold clamping force that can withstand the injection pressure. 8 is a guide pin for guiding the movable mold 52 straight. Reference numeral 9 denotes a motor with a speed reducer, which is configured so that mold thickness can be adjusted by the motor 9. 10
Is a safety door covering the front part of the fixed mold 51, and 11 is a toggle cover.

Reference numeral 12 denotes a mounting table for a take-out machine fixed on the movable mold 52, 13 denotes a nozzle touch limit switch, 14 denotes a safety door limit switch, 15 denotes a back side safety door limit switch, and 16 denotes an emergency stop. Button switch, 17 is a button switch for back side emergency stop, 18
Is an operation circuit breaker.

In the above embodiment, four core materials S are simultaneously sucked from the pallet plate 73 of the index table 71 on the work mounting table 70 by the suction pads 41 of the hand 40. The adsorbed core material S is applied to the suction pad 4
1 is rotated 90 degrees to be converted into a vertical posture, and is loaded into the fixed mold 51 of the mold 50 in the open state. At this time,
Even when the suspension pin 51C of the fixed mold 51 is fitted into the hole H1 of the core material S and the suction pad 41 is released, the core material S remains in the fixed mold 5
Suspended on one side. Then, the vacuum suction hole 51E is operated to suck and fix the core material S.

Next, when the movable mold 52 approaches, the movable mold 5
In the state where the second suspension pin 52C enters the hole H1 of the core material S while the suspension pin 51C of the fixed mold 51 is immersed,
Reaches the closed state. At this time, the core material holding areas 51A, 52A
No plastic injection is performed on the
The injection of the molten plastic is performed only on B and 52B. As a result, the periphery of the core material S near the hole H2 is molded, and the core material S and the plastic are integrated.

When the insert molding is completed, the movable mold 52
Moves to move the mold 50 to the open state. At this time, the pressing pins 51 F of the fixed mold 51 projects, is the release core S (the product W) from the stationary mold 51, while being suspended by suspension pins 52C, moves together with the moving die 52.

When the opening operation of the mold 50 is almost completed,
The next core material S is transported by the hand 40, and the charging operation for the fixed mold 41 is started. During this time, the pressing pins 52F, 52F of the movable mold 52 protrude, and the core material S
(Product W) is released and dropped to the shooter 4 below. That is, the carry-in of the core material S and the carry-out of the product W are simultaneously performed in parallel, and a cycle time in which the dead time is minimized is realized. The product dropped on the shooter 4 is transferred to the conveyor 60
It slides up and is transferred to the next process.

[0025]

As described above, the automatic carry-in / out insert molding machine according to the first aspect of the present invention is compatible with a fixed mold having a vertical mating surface.
The mold composed of the moving mold and the core material transported from the stocker are
Transport means for charging the fixed mold, and the fixed mold
Has a holding means for holding the core material, and
It is equipped with a transition means for transitioning to the mobile type.
The movable mold is shifted by the shifting means when the mold is opened.
Holding means for receiving and holding incoming products, and upon completion of mold opening
Since the product is equipped with a drop means for dropping the product, the work of loading the core material into the fixed mold by the transfer means and the work of dropping the product transferred to the movable mold by the transfer means by the drop means are simultaneously performed in parallel. Therefore, productivity can be improved by shortening the cycle time, and cost can be reduced by unmanned operation.

[0026] According to a second aspect of the present invention, the transfer means includes a hand of an XY traveling robot,
Since the suction pad and the rotating means of the suction pad are provided, the core material can be automatically charged into a mold having a simple configuration and a vertical mating surface. In the automatic carry-in / out insert molding machine according to the third aspect, since the holding means is a vacuum suction hole provided in each of the fixed mold and the movable mold, there is no possibility of interfering with the conveying means and the mold opening / closing means. The mechanism can hold the core material and the product.

[Brief description of the drawings]

FIG. 1 is a front view showing the appearance of an automatic carry-in / out insert molding machine of the present application.

FIG. 2 is a top view showing the appearance of the automatic carry-in / out insert molding machine of the present application.

FIG. 3 is a sectional view showing a basic configuration of a mold.

FIG. 4 is a sectional view showing a mold and a core material during insert molding.

FIG. 5 is a cross-sectional view showing the relationship between a fixed mold, a product, and a movable mold immediately after the mold is opened.

FIG. 6 is a cross-sectional view showing a relationship between a fixed mold and a core material before clamping, and a relationship between a movable mold and a product.

FIG. 7 is a front view of a core stocker.

FIG. 8 is a top view showing an index table and a pallet of a core stocker.

FIG. 9 is an enlarged front view showing an index table and a lifter of the core stocker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Injection cylinder 2 Nozzle touch cylinder 3 Hopper 4 Shooter 5 Fixing plate 6 Moving plate 7 Mold clamping cylinder 8 Guide pin 9 Motor with reduction gear 10 Safety cover 40 Hand (transportation means) 41 Suction pad 50 Mold 51 Fixed type 52 Moving type 51A, 52A Core material holding area 51B, 52B Mold area 51C, 52C Suspension pin 51D, 52D Projection 51E, 52E Suction hole 51F, 52F Extrusion pin 60 Conveyor 70 Work mounting table 71 Index table 72 Pallet base 73 Pallet plate 74 Pallet Pole 100 Automatic loading / unloading insert molding machine S Core material W Product

Claims (3)

(57) [Claims] 1. A fixed mold and a movable mold having a vertical mating surface, and a conveying means for charging a core material conveyed from a stocker into the fixed mold, and the fixed mold includes:
Holding means for holding the core material, and transfer means for transferring the product to the movable mold when the mold is opened, wherein the movable mold has been transferred when the mold is opened by the transfer means. An automatic carry-in / out insert molding machine, comprising: holding means for receiving and holding the product; and dropping means for dropping the product when the mold opening is completed. 2. The transfer means according to claim 1, wherein a hand of an XY traveling robot is provided with a vacuum or magnetic suction pad and means for rotating the suction pad.
Automatic loading / unloading insert molding machine as described. 3. The automatic carry-in / out insert molding machine according to claim 1, wherein the holding means for the fixed mold and the movable mold has a vacuum suction hole in each mold.