JPH0825412A - Automatic delivering and conveying insert molding machine - Google Patents

Abstract

PURPOSE:To automatically convey a core material and deliver a product and to shorten a cycle time by providing core material holding means in a stationary mold, transfer means for transferring the product to a movable mold at the time of opening the molds, holding means for holding the product in the movable mold, and dropping means for dropping the product at the time of completing the mold opening. CONSTITUTION:A hand 40 (conveying means) supplies a core material S to a mold 50, and the suspension pin 5 of a stationary mold 51 is engaged with the hole H1 of the material S. Then, a movable mold 52 is approached. The mold 50 is closed in the state that its suspension pin 52C is advanced to the hole H1 of the material S while submerging the pin 51C of the mold 51. In this case, molten plastic is injected only in molding areas 51B, 52B. Then, when the mold 50 is opened, the pressing pin 51A of the mold 51 protrudes to release the material S (product W), and moves together with the mold 52 by the pin 52C. The pressing pins 52F of the mold 52 protrude to release the product W, thereby dropping it in a chute.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of insert molding molten plastic into a core material (usually a metal member) which is automatically carried into a mold to form an integrally molded product, and further, the product is automatically carried out. The present invention relates to an automatic loading / unloading insert molding machine.

[0002]

2. Description of the Related Art Generally, an insert molding machine is one in which molten plastic is injected and molded into a mold in which a core member such as a metal is inserted, and the mold is integrated to reduce the number of parts and simplify the assembly process. It is a production method that is very effective for such purposes. A conventional insert molding machine is provided with a mold including an upper mold and a lower mold having a lateral (horizontal) mating surface, and manually inserts the core material into the lower mold, and after the insert molding is completed, It was also configured to manually remove the molded product.

[0003]

The conventional insert molding machine described above is extremely inefficient because the core material is charged and the product is taken out manually. In particular, it has been a serious drawback of the conventional apparatus that it is difficult to reduce the cycle time of opening and closing the mold and the productivity is not improved. The present invention has been made in view of the above points, and an object thereof is to provide an insert molding machine that includes means for automatically carrying in a core material and carrying out a product, and can significantly reduce the cycle time.

[0004]

In order to achieve the above-mentioned object, an automatic loading / unloading insert molding machine according to a first aspect of the present invention conveys from a stocker and a mold including a fixed mold having a vertical mating surface and a movable mold. And a conveying means for charging the fixed core 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. The movable die is provided with a holding means for holding the product and a dropping means for dropping the product when the mold opening is completed.

In the automatic loading / unloading insert molding machine according to a second aspect of the present invention, the carrying means is a hand of an XY traveling robot.
A vacuum or magnetic suction pad and a means for rotating the suction pad are provided. In the automatic loading / unloading insert molding machine according to a third aspect of the present invention, the holding means for the fixed die and the movable die is provided with a vacuum suction hole in each die.

[0006]

According to the first aspect of the present invention, the work of loading the core material into the fixed mold by the conveying means and the work of dropping the product transferred to the movable mold by the dropping means are simultaneously performed in parallel. In claim 2, after the core materials that are stacked and stored are 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 vertically inserted into the fixed mold. In the third aspect, the fixed core material and the movable product are sucked into the vacuum suction holes and held in 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 accompanying drawings. 1 and 2, reference numeral 1 denotes an injection cylinder of an automatic carry-in / out insert molding machine 100 of the present application. The injection cylinder 1 enables injection of molten plastic into a sealed mold 50 through a nozzle touch cylinder 2. It is configured. Reference numeral 3 is a hopper for supplying raw material pellets to the injection cylinder 1.

Numeral 4 is a shooter provided below the opening / closing part of the mold 50, which is used for removing 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 slipped off the shooter 4 is transferred to the conveyor 60 and can be conveyed to the next step.

The mold 50, as shown in FIGS.
It is composed of a fixed die 51 having a vertical mating surface and a movable die 52, and holds the core material S loaded in the die from both sides,
It is configured so that molten plastic can be molded and integrated into the predetermined region. Reference numeral 5 is a fixed plate that supports the fixed die 51, and 6 is a movable plate that supports the movable die 52. As will be described later, the core material S is preferably a member having at least one hole in order to simply realize the transition from the fixed type to the movable type. In the present embodiment, two cores are provided. The example of the core material S provided with the 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 recessed part of the component by a plurality of extrusion pins or transfer the core material S by a linked operation such as vacuum suction or magnetic suction. Therefore, the present invention is basically independent of the shape of the component.

Next, the structure of the mold 50 will be described in detail. In the fixed die 50 and the movable die 51, 51A and 52A are core material holding area portions that only hold the core material S without performing plastic injection, and the core material holding areas 51A and 52A include
Suspension pins 51C and 52C fitted in the holes 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 arranged, respectively. ing. The suspension pin 51C provided on the fixed die 51 is biased by the spring B so as to always project in the mold open state, and is fitted into the hole H1 of the core material S loaded by the conveying means. The core material S can be suspended.

On the other hand, the suspension pin 52C provided on the movable die 52 is coaxially opposed to the suspension pin 51C of the fixed die 51, and is fixed so as to always be in a protruding state. That is, the suspension pin 52C is adapted to be fitted into the hole H1 of the core S while pressing the suspension pin 51C of the fixed die 51 to make the suspension pin 52C sink into the fixed die 51 during mold clamping. Thereby, the core material S after molding is configured to be suspended by the suspension pins 52C and move to the movable die 52 side when the die is opened.

The suction holes 51E are for holding the core material S immediately after charging on the fixed die 51 side, and the suction holes 52E are for holding the molded core material S on the movable die 52 side, respectively. . The suction holes 51E and 52E can suck the flat surface of the core material S to improve the adhesion between the core material S and the mold. The pipe of the suction hole 51E is inserted through the back plate 61. If the core material S is a magnetic material, the attraction holes 51E and 52E may be replaced by a magnetic attraction means using an electromagnetic solenoid.

The push pin 51F on the fixed die 51 side is for giving an external force for separating the core material S from the fixed die 51, and is constructed so as to be retractable by a pneumatic cylinder 51G. That is, the extrusion pin 51F protrudes at the start of mold opening after molding, separates the core S from the fixed mold 51, and can urge the core S to move to the movable mold 52 side together with the suspension pin 52C. It is like this. On the other hand, the push pins 52F, 52F on the movable die 52 side are erected on the back plate 62 that is moved forward and backward by the driving means 63, and are configured to be able to appear and disappear according to the movement of the back plate 62. There is. The extruding pins 52F and 52F project 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 are molding regions for molding the molten plastic in predetermined regions of the core material S,
The mold regions 51B and 52B are configured so that a predetermined void can be formed in the core material S. Then, the molten plastic can be injected into the space surrounded by the mold regions 51B and 52B to integrate the core material S and the plastic.

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

Next, the conveying means for the core S will be described. In FIGS. 7 and 8, an index table 71 is provided on a work placing table 70 arranged at the rear of the insert molding machine 100, and the pallet plate 7 on which the core material S is placed is further provided on the index table 71.
3, 73, 73, 73 are arranged every 90 degrees.

Here, each pallet plate 73 is provided with four pallet poles 74 which are inserted through the holes H1 of the core material S, and a large number of core materials S are stacked and housed 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 (conveying means), which is the hand 4
0 is attached to a Cartesian coordinate type arm robot (not shown), and the Z direction (vertical direction) and the X direction (die 50).
It is configured so that the core material S can be supplied to the mold 50 by moving in the opening / closing direction (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. Will be). The hand 40 is provided with four suction pads 41, and the pallet plate 73
Four upper core materials S can be simultaneously vacuum-sucked and conveyed. Here, the suction pad 41 is used for the hand 4
It is configured to be able to rotate 90 degrees with respect to 0, and when the core material S adsorbed in the horizontal position (horizontal position) is loaded into the fixed mold 51 of the mold 50, it can be converted into the vertical position (vertical position). It is like this.

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

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

In the above embodiment, four core materials S are simultaneously adsorbed by the adsorption pad 41 of the hand 40 from the pallet plate 73 of the index table 71 on the work mounting table 70. The sucked core material S is sucked by the suction pad 4
It is converted to a vertical position by rotating 1 by 90 degrees and is loaded into the fixed mold 51 of the mold 50 in the open state. This time,
Even if the suspension pin 51C of the fixed die 51 is fitted into the hole H1 of the core material S and the suction pad 41 is released, the core material S remains fixed.
Suspended on one side. Then, the vacuum suction hole 51E operates to suck and fix the core material S.

Next, when the movable die 52 approaches, the movable die 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 die 51 is immersed, the mold 50
Is closed. At this time, the core material holding areas 51A and 52A
No plastic injection is performed on the mold area 51.
The molten plastic is injected only in B and 52B. As a result, the vicinity of the hole H2 of the core S is molded, and the core S and the plastic are integrated.

When the insert molding is completed, the movable die 52
Moves to move the mold 50 to the open state. At this time, since the pressing pin 51A of the fixed die 51 projects, the core material S (product W) is released from the fixed die 51 and moves together with the movable die 52 while being suspended by the suspension pin 52C.

By the time the opening operation of the mold 50 is almost completed,
The next core material S is conveyed by the hand 40, and the charging operation for the fixed die 41 is started. Then, during this time, the pressing pins 52F, 52F of the movable die 52 are projected, and the core S
(Product W) is released and dropped to the shooter 4 below. That is, the loading of the core material S and the unloading of the product W are simultaneously performed in parallel, and a cycle time with a minimum dead time is realized. The product dropped on the shooter 4 is conveyed by the conveyor 60.
It slides down and is transferred to the next process.

[0025]

As described above, in the automatic loading / unloading insert molding machine according to the first aspect of the present invention, the fixed mold and the movable mold are provided with the mold and the metal member conveyed from the stocker to the fixed mold. The stationary die comprises a carrying means for putting in, and the fixed die comprises a holding means for holding the loaded metal member, and a transition means for migrating the metal member to the movable die at the start of mold opening. Since the holding means for holding the metal member and the dropping means for dropping the metal member at the end of the mold opening are provided, the work of loading the core material into the fixed die by the conveying means and the product moved to the movable type by the transferring means The work of dropping by the dropping means can be performed in parallel at the same time, and the productivity improvement by shortening the cycle time and the cost reduction by unmanned can be achieved at the same time.

In the automatic loading / unloading insert molding machine according to a second aspect of the present invention, the transfer means is a hand of an XY traveling robot.
Since the suction pad and the rotation means for the suction pad are provided, the core material can be automatically loaded into a mold having a vertical mating surface with a simple structure. In the automatic loading / unloading insert molding machine according to claim 3, since the holding means is a vacuum suction hole provided in each of the fixed die and the movable die, there is no fear of interfering with the conveying means or the opening / closing means of the die. The mechanism can hold the core material and the product.

[Brief description of drawings]

FIG. 1 is a front view showing an 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 loading / unloading insert molding machine of the present application.

FIG. 3 is a cross-sectional view showing the basic structure of a mold.

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

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

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

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

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

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

[Explanation of symbols]

 1 Injection Cylinder 2 Nozzle Touch Cylinder 3 Hopper 4 Shooter 5 Fixed Plate 6 Moving Plate 7 Clamping Cylinder 8 Guide Pin 9 Motor with Reducer 10 Safety Cover 40 Hand (Transportation Means) 41 Suction Pad 50 Mold 51 Fixed Type 52 Mobile Type 51A, 52A Core material holding area 51B, 52B Mold area 51C, 52C Suspension pin 51D, 52D Projection part 51E, 52E Adsorption hole 51F, 52F Extrusion pin 60 Conveyor 70 Work placement 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)

[Claims] 1. A fixed die comprising a fixed die having a vertical mating surface and a movable die, and a conveying means for charging a core material conveyed from a stocker into the fixed die, the fixed die comprising:
A holding means for holding the core material, and a transfer means for transferring a product to the moving mold when the mold is opened, wherein the moving mold holds the product and a product when the mold opening is completed. An automatic carry-in / out insert molding machine, characterized in that it is provided with a dropping means for dropping. 2. The transfer means comprises a vacuum or magnetic suction pad and a means for rotating the suction pad on the hand of an XY traveling robot.
Automatic loading / unloading insert molding machine described. 3. The automatic loading / unloading insert molding machine according to claim 1, wherein the holding means for the fixed die and the movable die are provided with vacuum suction holes in each die.