JPS6072719A - Automatic molding and packaging machine of molded item - Google Patents

Abstract

PURPOSE:To prevent a molded item from dirt, damage, loss by taking the molded item out of a molding machine, covering it with thermoplastic resin film and heat-sealing the opening part of this thermoplastic resin film. CONSTITUTION:The molded item 13 of which the gate is cut clearly and molded by the injection molding machine 10 is mounted in sequence by the arm part 21 on the film 31b sent by the rotary drive of the roller 36 intermittently according to the molding cycle. The molded item is pinched between the films 31b, 31a to complete the packaging sealed between the films 31a, 31b at the heat seal part 35. In this manner, the molded item is packaged directly by the molding machine on the thermoplastic resin film and so when the molded item is naked the conveying distance is so short that dirt, damage, loss, etc. that have occurred during the conveyance so far in the prior art can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic molding and packaging device for molded products, and more particularly to a device that automatically performs the entire process from molding a molded product to wrapping it with a film.

Conventionally, after molded products are molded by a molding machine and taken out, they are often subjected to finishing processes such as gate cutting as necessary, and then packed directly or in plastic bags and boxes.

Although automatic machines have been developed for some of these tasks, from forming to packaging, there is still a lot of manual intervention, especially when it comes to putting the products into bags. . In addition, in these post-molding steps, there are drawbacks such as the molded products becoming dirty or damaged during movement, or the molded products being minute and easily powdered.

The present invention solves the above-mentioned problems by melt-sealing the molded product with a thermoplastic resin film immediately after taking it out from the molding machine, thereby preventing dirt, damage, and loss of the molded product. The purpose is to provide an automatic molding and packaging device for molded products that can mold plastic materials, and its features include a molding machine that molds plastic materials, a take-out device that takes out the molded products from this molding machine and places them on a thermoplastic resin film, and a thermoplastic resin film. The molded product is covered with a film, and the thermoplastic resin film is heat-sealed at the opening to encapsulate the molded product.

Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 illustrates a mold structure of a molding machine, and FIGS. 2 and 3 show preferred embodiments of the present invention.

In carrying out the present invention, it is preferable that the molded product does not require a finishing step such as gate cutting after molding, and therefore it is desirable to use a mold capable of various types of gateless molding, such as a hot runner or a shear gate.

The method shown in FIG. 1 allows the fractured surface to be finished more neatly than these known gateless molding methods.This will be explained below. A cutter 4 is provided that slides reciprocally across the gate part 2 on the parting surface of the other mold 3 where the molded product is left, and when the mold is opened, the cutter 4 is moved toward the gate part 2. The gate is cut from the molded product 6 by being advanced by a support bar 5 connected to a cylinder (not shown), etc., and then the molded product 6 is ejected and the pin 7
Release from the mold. Note that when the mold is closed, the cutter 4 is accommodated in a relief portion 8 carved in the parting surface of the mold 1. Therefore, the gate is cut before it is completely cooled, and the cutter 4 can be moved accurately along the side of the molded product, so that the gate can be cut with a clean gate cut surface. become what is done.

Next, the present invention will be explained in detail based on FIGS. 2 and 3.

10 is a vertical injection molding machine, and a turntable 11
Molded products 13 are alternately formed by two molds 12 fixed above.
is formed. The mold 12 is provided with the cutter 4 and the ejecting pin 7 described above, and the gate of the molded product 13 can be cut cleanly.

Reference numeral 20 denotes a take-out device for automatically taking out a molded product from the injection molding machine 10, which rotatably and vertically supports and drives an arm portion 21 for taking out a molded product 13 and placing it on a film to be described later.

30 is a melt-sealing machine for packaging the molded product 13, and the thermoplastic resin film 3 is wound around a drum located above.
1a and a thermoplastic resin film 31b wound around a drum located below, the molded product 13 is covered from above and below, and the periphery of the molded product 13 is heat-sealed to separate the molded product 13 into the film 31a and the film 31b. Enclose between.

32 is a support plate, on which the film 31b slides. That is, the film 31b is
3a and 33b, and enters from one end of the support plate 32.

Note that the other film 31a is a roller 34a.

34b, it enters the middle point of the support plate 32, and the lower surface of the film 31a and the upper surface of the film 31b face each other, and are fed in the film feeding direction A indicated by the arrow in the figure. Furthermore, the molded product 13 taken out from the injection molding machine by the arm part 21 is transferred to the roller 34b by the movement of the arm part 21.
It is placed on the film 31b between the roller 33b and the roller 33b.

Reference numeral 35 denotes a heat sealing section, which is located on the film feeding direction A side with respect to the roller 34b, is disposed above the support plate 32, moves up and down toward the support plate 32, and seals the film 31a and the film 31b into the molded product 13. Heat weld around the area.

Reference numeral 36 denotes two rollers for feeding the films a1a and 31b, which are located on the side of the film feeding direction A with respect to the heat-sealing section 35, and are used to convey the heat-sealed film 3 into one piece.
1a and the edge part of the film 31b by rollers 36a and 3.
The films 31a and 31b are intermittently fed in the film feeding direction A in accordance with the molding cycle while being sandwiched between the two films 31a and 31b.

Thus, the molded products 13 sequentially placed on the film 31b by the arm section 21 are separated by the film 31b and the film 3.
It is sandwiched between the film 31a and the film 31t+ from above and below, and is positioned below the heat-sealing part 35 by the rotation of the roller 36, and as the heat-sealing part 35 descends, it is sequentially sealed between the film 31a and the film 31t+. Appropriate storage box 37
contained within. Incidentally, a perforation is formed in the film at an intermediate position of each enclosed molded product 13 by the blade portion 38.

Since the present invention is constructed as described above, the molded product 1 is molded with the gate neatly cut by the injection molding machine 10.
3, the arm portion 2 is placed on the film 31b that is intermittently fed according to the molding cycle by the rotational drive of the roller 36.
1, film 31b and film 3 are placed one after another.
The film 3 is sandwiched between the film 1a and the heat seal part 35.
1a and film 31b to complete packaging.

In this way, according to the present invention, the molded product is packaged by being directly placed on the thermoplastic resin film from the molding machine without any manual intervention, so the distance that the molded product is transported in a naked state is extremely short. It has the remarkable effect of preventing contamination, damage, loss, etc. of large molded products that conventionally occur during transportation.

The present invention has been described above with reference to examples, but the present invention is not limited to these examples. Of course, many modifications may be made without departing from the spirit of the invention, such as sometimes assembling other parts or including instructions and labels at the same time.

This allows tableware made of metal with a synthetic resin handle, medical parts, etc. to be extremely hygienically transported, and instructions, labels, etc. to be transported to the user reliably without being lost. Furthermore, the molded product is charged with static electricity and tends to attract dust in the air, but this can be easily prevented by providing a narrow clean area between the mold and the sealing machine.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a mold having a force and vine for cutting a gate, FIG. 2 is an explanatory diagram showing the planar arrangement of the present invention, and FIG. 3 is a front explanatory diagram of the present invention. ■... Mold, 2... Gate part, 3... Mold, 4...
... Cutter, 5... Support bar. 6... Molded product, 7... Ejection pin, 8... Relief part, 10... Injection molding machine, 11... Turntable, 12... Mold. 13... Molded product, 20... Taking out device. 21...Arm part, 30...Fusing machine. 31a, 31b...film, 32...support plate,
33a, 33b...roller, 34a. 34b...Roller, 35...Heat seal portion, 3
6.36a, 36b...Rollers. 37...Storage box, 3B...Blade part. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A molding machine that molds a plastic material; a take-out device that takes out a molded product from this molding machine and places it on a thermoplastic resin film; An automatic molding and packaging device for molded products, comprising a melt-sealing machine that heat-seals the opening of a plastic resin film to encapsulate the molded product.