JPH0435331B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for attaching an injection-molded synthetic resin molded article to a tape, taking it out, and conveying it to another place as it is.

(Prior Art) In injection molding, a molded product is taken out from a mold by letting it fall naturally into a storage box, or by using an automatic take-out device.

(Problem to be solved by the invention) Since the molded products in the storage box that have fallen naturally are oriented in different directions, it is not possible to put them in the storage box as is and transport them to the next process such as assembly. It is necessary to align the parts so that they can be assembled automatically.

However, not only is this alignment device complicated and expensive, but the molded products may be damaged during alignment, and depending on the shape of the molded products, alignment may not be possible.

If an automatic take-out device is used, it is possible to align the orientation of the taken-out molded products, but the automatic take-out device itself is expensive, and some molded products may be difficult to pick up, or the molded products may not be easily picked up when picked up. may also be damaged.

In addition, temporary storage boxes are often used for transportation to the next process, which requires time-consuming work such as aligning the molded products one by one during transportation, or removing them at the destination without damaging the alignment. It was expensive.

This invention was devised to solve the above-mentioned conventional problems, and its purpose is to make it possible to take out a large number of aligned molded products from a mold by using a tape, and to make it possible to take out a large number of aligned molded products from a mold, and to make it possible to take out a large number of aligned molded products from a mold. To provide a new method which is excellent for taking out and transporting especially small molded products, which can be transported to another place while maintaining the molded products, and does not require aligning the molded products with another device when automatically assembling the molded products. There is a particular thing.

(Means for Solving the Problems) The feature of the present invention for the above-mentioned purpose is to feed a take-out tape of a required width made of paper or synthetic resin between molds, and close the mold together with the take-out tape to produce a molded product. When injection molding is performed, the molded products are attached to the center of the take-out tape at regular intervals, and taken out of the mold after the mold is opened, and the molded products are transported by the take-out tape. The attachment area has an opening area larger than the cavity area,
In addition, a relief hole in the molded product with a required number of attached pieces projecting from the opening edge is bored together with a positioning hole, and by fitting the positioning hole with a positioning pin on the mold side, the relief hole and the cavity are overlapped. Then, the adhesive piece is protruded into the cavity surface, and the molded product is partially attached to the take-out tape via the adhesive piece.

(Function) In the above method, when the take-out tape fed between the opened split molds is closed together with the split molds, the relief holes and the cavities are aligned, and polymerized, the adhered pieces on the opening edges are attached to the cavities. Located protruding within the plane. Therefore, when a molded product is formed by injecting and filling the cavity with molten resin, most of the molten resin that forms the end face of the molded product does not adhere to the take-out tape through the escape hole, but a very small portion that overlaps with the adhered pieces does. Weld to the attached piece. As a result, the molded product partially adheres to the take-out tape, and even when the mold is released after opening the mold, the molded product remains attached to the take-out tape.

(Example) 1 in the figure is a take-out tape, which is made of paper tape, surface-coated paper tape, synthetic resin tape made of polyester, etc. The width varies depending on the dimensions of the molded product, but the thickness is 0.05 to 0.02 mm. It is of a certain degree.

As shown in FIG. 1, the central part of the take-out tape 1 has an opening area larger than the area of the cavity 8, and four small semicircular attachment pieces 1a are provided at the edge of the opening. Evacuation holes 2 of the rectangular molded product are bored at regular intervals.

Also, on both sides of the escape hole 2, positioning pins 7 on the mold 5 side are fitted to connect the escape hole 2 to the cavity 8.
Positioning holes 3 are drilled at regular intervals for accurately overlapping positions.

Although the spacing and dimensions between the escape hole 2 and the positioning hole 3 vary depending on the mold dimensions, the protrusion dimension of the adhesive piece 1a projected into the cavity surface is preferably about 0.1 to 0.2 mm.

Further, although the positioning hole 3 is used as a delivery hole for the take-out tape 1, a delivery hole may be provided separately depending on the case.

The puncher 4 punches the escape hole 2 and the positioning hole 3.
The take-out tape 1 that has been perforated is sent out between the opened split molds 5a and 5b by means of automatic moving devices 6 and 6 disposed on both sides of the mold 5. Then, close the split molds 5a and 5b together with the take-out tape 1, fit the positioning hole 3 into the positioning pin 7,
Align escape hole 2 and cavity 8 and polymerize. As a result, the adhesive piece 1a is located in a protruding position within the plane of the cavity 8.

Next, when the cavity 8 is injected and filled with molten resin to form a molded product 9, most of the molten resin forming the end face of the molded product 9 is removed from the take-out tape 1 through the escape hole 2.
However, a very small portion that overlaps the adhesive piece 1a is welded to the adhesive piece 1a. As a result, the molded product 9 is partially attached to the take-out tape 1.

When the split molds 5a and 5b are opened after injection molding to release the molded product 9, the molded product 9 does not fall from the mold 5 but remains attached to the take-out tape 1 side. Therefore, the automatic moving devices 6, 6 remove the tape 1 to be taken out.
When it is fed out of the mold, the molded product 9 is also fed out together with it, and a new portion of the continuous take-out tape 1 is fed out between the split molds, creating an escape hole 2 in the cavity 8.
is located.

As shown in the figure, the take-out tape 1 sent out of the mold can be wound up with the molded product 9 still attached, and can be transported to the next process such as an automatic assembly process in that state. . Further, the wound take-out tape 1 can be later cut into a predetermined length, stored in a packaging container, etc., and transported elsewhere.

(Effects of the Invention) As described above, this invention performs injection molding of a molded product with the help of a take-out tape, and the molded product can be attached to the take-out tape and transported together. When taking out and transporting, there is no need for the conventionally used automatic take-out machine.

In addition, since a large number of molded products adhere to the take-out tape in alignment at regular intervals, when using small molded products as parts, it is necessary to use an alignment device to
There is no need to line up the molded products one by one, and when removing the molded products from the take-out tape, the molded products can be partially attached to the take-out tape via an adhesive piece protruding from the opening edge of the escape hole, which has an opening area larger than the cavity area. So,
It can be easily done with a small amount of force, and the molded product will not be damaged during removal.

Furthermore, molded products can be transported and stored together with the take-out tape, making it convenient for handling small molded products.A tape made of inexpensive material can be used as the take-out tape, and the mold structure requires only the addition of positioning pins. It has the advantage that it is not particularly complicated and can be easily carried out by simply providing a puncher for the take-out tape and an automatic transfer device in the molding machine, so that the cost does not increase.

[Brief explanation of drawings]

The drawings illustrate the method according to the invention,
Fig. 1 is a surface view of the take-out tape, Fig. 2 is a schematic diagram of the molding machine, Fig. 3 is a partial sectional view of the mold when the mold is closed, Fig. 4 is a partial sectional view of the mold during molding, FIG. 5 is a partial sectional view of the mold during mold release, and FIG. 6 is a perspective view of the take-out tape after molding. 1...Removal tape, 1a...Adhesive piece, 2...Escape hole, 3...Positioning hole, 4...Puncher, 5
... Mold, 5a, 5b ... Divided mold, 6 ... Automatic transfer device, 7 ... Positioning pin, 8 ... Cavity, 9 ... Molded product.

Claims (1)

[Scope of Claims] 1. A take-out tape of a required width made of paper or synthetic resin is fed between molds, the mold is closed together with the take-out tape, injection molding of a molded product is performed, and the molded product is taken out as described above. When the tape is attached at regular intervals to the center of the tape and taken out of the mold after the mold is opened, and the molded product is transported by the take-out tape, the opening area of the take-out tape where the molded product is attached is larger than the cavity area. , and an escape hole in the molded product with a required number of attached pieces protruding from the opening edge is bored together with a positioning hole, and by fitting the positioning hole with a positioning pin on the mold side, the escape hole and the cavity are connected. A method for taking out and conveying a molded product, characterized in that the adhered piece is polymerized to protrude into the cavity surface, and the molded article is partially attached to a take-out tape via the adhered piece.