JPH0647778A - Automatic sheet attaching device of injection molding machine - Google Patents

Abstract

PURPOSE:To provide an automatic sheet attaching device, of an injection molding machine, which performs a sequence of jobs for attaching and fixing a plastic sheet to a die automatically using a articulated robot. CONSTITUTION:The subject automatic sheet attaching device of an injection molding machine consists of a vessel 1 which stores about 100 sheets 5 in a stacked manner, an electric charger 2 which charges the sheet electrically, an injection molding die 16 which fixes the electrically charged sheet, and an articulated robot 4 having a tool 23 which attracts, sticks, retains or peels off the sheet provided at the tip of an arm. The multi-articulated robot 4 automatically performs the jobs to retrieve the sheet 5 one by one from the vessel 1, set the sheet to the electric charger 2, and attach/fix the electrically charged sheet to the die 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically attaching and fixing a plastic sheet (including a film having a thickness of 0 or 2 mm or less) to a mold of an injection molding machine.

[0002]

2. Description of the Related Art Some plastic products have a plastic sheet (hereinafter simply referred to as a sheet) having a picture pattern or the like attached to the surface of the main body.

In this case, in the injection-molded product, the sheets are attached at the same time as the molding. That is, the simultaneous attachment is achieved by fixing the sheet in advance at a predetermined position of the mold in the injection molding machine.

At this time, in order to stably fix the sheet to the mold, the sheet is charged in advance by a charger.

In the past, the fixing of the sheet to the mold and the charging operation were all manually performed by the operator.

[0006]

Therefore, there is a problem in that it is difficult to secure a worker due to a lack of manpower, and it is very dangerous and inefficient to fix the sheet to the mold by hand. There was a point.

Therefore, an object of the present invention is to solve the above-mentioned problems by automating a series of operations for fixing a sheet to a mold by a robot.

[0008]

In order to achieve the above-mentioned object, the structure of the present invention is a container having an open upper surface for accommodating and accommodating a large number of sheets, a charger for charging the sheets, and the charged sheets. And a multi-joint robot capable of delivering the sheets from the container to the mold via the charger via the charger, the jig being capable of detachably holding the sheets one by one. , Are included.

[0009]

According to the above construction, a series of operations of setting the sheet taken out from the container to the charger and fixing the charged sheet to the mold is automated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view showing a schematic configuration of an automatic sheet sticking apparatus according to the present invention.

In FIG. 1, 1 is a resin container with an open upper surface for accommodating and stacking about 100 sheets, 2 is a charger for charging the sheets, 3 is an injection molding machine, 4 is a charger from the container 1 It is an articulated robot capable of delivering the sheet to the injection molding machine 3 via 2.

As shown in FIG. 2, the container 1 is formed in a rectangular thin box shape corresponding to the sheet shape. Also,
As shown in FIG. 3, since the seat 5 is curved in an arch shape in a free state, spring-equipped presser bars 6 are arranged on both short-side sides of the container 1, and one of them ( The right side in the figure) can be moved back and forth by the air cylinder 7.

As shown in FIG. 4, the charger 2 has a static electricity generating device 8 and an operating base 9. The operating base 9 is moved to a position right below the static electricity generating device 8 by the air cylinder 10 when the sheet is charged. It is possible.

A seat fixing plate 11 is arranged on the working table 9. The seat fixing plate 11 is provided with a plurality of holes 12 (six in the figure) for both air blowing and suction, which are selectively connected to a pressurized air source such as an air compressor and a negative pressure source such as a vacuum pump. Slender resin plate 1 for positioning the sheet 5 on three sides
Three 3 are attached.

In the injection molding machine 3, the injection mechanism section 14 and the mold clamping mechanism section 15 are arranged side by side, and the thermoplastic resin is heated and fluidized in a heated cylinder, which is then injected into an injection ram (not shown). ) Is pressed into the mold 16 with a plunger (not shown) to obtain a molded product.

When the mold is opened, the above-described charged sheet 5 is attached and fixed to the inner wall surface of the mold 16 on the stationary platen side in a leaning state. In addition,
In FIG. 1, 17 is a toggle and 18 is a hydraulic cylinder.

In the multi-joint robot, the first arm 21 is pivotally attached to the swivel base 20 which can swivel on the support column 19, and the second arm 2 is attached to the tip of the first arm 21.
2 is pivotally mounted in a bendable manner, and a jig 23 is pivotably mounted in a tip end of the second arm 22 in a teaching playback system.

The jig 23 has a main body 25 rotatably supported by a pivotally attached portion 24, and also has a main body 2
A plurality of first suction pads 26 and a plurality of sheet fixing air outlets 27 are attached to the front surface of the sheet 5, and a plurality of second suction pads 28 are attached to the side surface of the main body portion 25.

Due to this structure, when the sheet 5 is taken out from the container 1 described above, first, one end side of the sheet 5 is sucked by the first suction pad 26 as shown in FIG. After that, the first suction pad 26 is raised and moved laterally to the middle of the sheet 5 to peel off one sheet 5.

At this time, the holding bar 6 located on the side of the suction portion is retracted in advance by the air cylinder 7.
Further, in order to facilitate the peeling of the sheet 5, as shown in FIG. 7, air may be blown to both corners of the sheet 5 by a predetermined means after confirmation of suction. (Refer to the arrow in the figure).

After that, by raising the first suction pad 26, the sheet 5 is completely peeled and taken out of the container 1, but at the same time, the pressing bar 6 is advanced to fix the remaining sheet 5. It

Next, the sheet 5 taken out of the container 1
Is fixed to the sheet fixing plate 11 of the charger 2 in order to be charged. However, since the sheet 5 is curved at this time, it is difficult to fix it in the correct position as it is.

Therefore, as shown in FIG. 8, while being fixed by the first suction pad 26, the air is blown from the air blowing port 27 and pressed against the fixed position, and then the sheet fixing plate 1 is pressed.
A vacuum state is generated from the hole 12 of No. 1 and the sheet 5 is fixed at an accurate position surrounded by the resin plate 13.

When the seat 5 is correctly fixed, the articulated robot 4 moves to a predetermined position for the next operation. On the other hand, the seat fixing plate 11 is positioned directly below the static electricity generating device 8 by the movement of the working table 9 by the air cylinder 10.
At the same time, the static electricity generator 8 is turned on, and static electricity is generated on the sheet 5. Then, when the charging is completed, the sheet fixing plate 11 returns to the original position.

Next, the charged sheet 5 is peeled from the charger 2 and fixed to the jig 23 of the articulated robot 4. In this case, first, the second suction pad 28 of the jig 23 is fixed to the sheet. Adhesion is started by bringing the plate 11 into close contact.

At this time, the sheet 5 and the sheet fixing plate 11 are strongly adhered to each other by the charging operation described above and cannot be peeled off as they are. I do.

In this way, the electrified sheet 5 fixed to the jig 23 is finally directly attached to the above-mentioned predetermined mold 16 of the injection molding machine at the timing of mold opening. Fixed. In addition, the sheet 5 is used for the mold 1
Instead of fixing it directly to 6, it may be fixed using a take-out machine for the molding machine.

Further, it is needless to say that the present invention is not limited to the above-mentioned embodiment and various modifications can be made without departing from the gist of the present invention.

[0029]

As described above, according to the present invention, since a series of operations for fixing a sheet to a mold are automated by a robot, it is possible to eliminate labor shortage and improve safety and productivity. To be

[Brief description of drawings]

FIG. 1 is an overall plan view showing an embodiment of the present invention.

FIG. 2 is a perspective view of the container.

FIG. 3 is also an explanatory view of a presser bar.

FIG. 4 is an overall perspective view of the charging device.

FIG. 5 is a plan view of the seat fixing plate.

FIG. 6 is an explanatory view of a sheet taking-out work.

FIG. 7 is an explanatory diagram of a modified example of the sheet taking-out work.

FIG. 8 is an explanatory view of a seat fixing operation of the same.

[Explanation of symbols]

 1 Resin Container 2 Charger 3 Injection Molding Machine 4 Articulated Robot 5 Sheet 6 Presser Bar 8 Static Electricity Generator 11 Sheet Fixing Plate 16 Mold 23 Jig

Claims (1)

[Claims] 1. A container having an open upper surface for accommodating a number of stacked plastic sheets, a charger for charging the plastic sheets, an injection molding die capable of fixing the charged plastic sheets, and the plastic sheet. An automatic injection molding machine, comprising: a multi-joint robot that has a jig that can be detachably held one by one at the tip of an arm, and that can transfer the plastic sheet from the container to a mold through a charger. Sheet pasting device.