JPH0253209B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for attaching a molded article to a take-out tape during molding and transporting the molded article together with the take-out tape.

[Prior Art] In the method for taking out and transporting molded products (Japanese Patent Application No. 103458/1983) developed by the present inventor, a taking out tape made of paper or synthetic resin is fed between molds, and the taking out tape is At the same time, the mold is closed, a part of the take-out tape is placed in the cavity, and resin is injected into the cavity to form the molded product.At the same time, the molded product is attached to the take-out tape, and when the mold is opened, it is released from the mold. The molded product is then transported out of the mold together with the take-out tape and wound up.

[Problems to be Solved by the Invention] In recent years, various methods have been devised and put into practical use for determining the quality of a molded product being molded using a device included in an injection molding machine. Even if the product is determined to be defective by the process, it will be sent out stuck to the pick-up tape like non-defective products, so it will be necessary to inspect it again in the subsequent process. Uncertain sampling inspections are being conducted. For this reason, a large amount of time and effort is required in a complete inspection, and defective products may be overlooked in a sampling inspection, which has become a problem.

[Means for Solving the Problems] The present invention was conceived in view of the above circumstances, and its purpose is to reliably and easily determine the quality of molded products transferred by a take-out tape. The goal is to provide new ways to do things.

This invention for the above purpose feeds a take-out tape made of paper or synthetic resin between molds, closes the mold together with the take-out tape, positions a part of the take-out tape in a cavity, and places resin in the cavity. At the same time, the molded product is injected and molded, the molded product is attached to a take-out tape, and when the mold is opened, the mold is released and the molded product is transported outside the mold together with the take-out tape. The detected molded defective product is displayed by marking the defective product or a take-out tape near the defective product using a marking device activated by a defective product detection signal.

[Operation] In the above method, the molded product that has been molded and adhered to the take-out tape is transported outside the molding machine by the transfer of the take-out tape, and if the molded product is determined to be defective, a defective product signal is issued. , a marking device installed outside the mold is activated to place an indication mark on the defective molded product or on the take-out tape near the defective molded product. Then, the take-out tape is transferred as it is to a winding device, an assembly device, or the like.

[Example] The extraction tape 1 is made of a paper tape, a paper tape whose surface is coated, a synthetic resin tape made of polyester, etc., and the width varies depending on the dimensions of the molded product, but the thickness is about 0.05 to 0.2 mm. be.

In the center of this take-out tape 1, there is a punch hole 2 for positioning a part of the take-out tape 1 to protrude from the cavity as an attachment piece 1a, and on both sides, a hole 2 is fitted with a positioning pin on the mold side. Positioning holes 3 for accurately positioning the parts 2 in the cavity are formed at regular intervals.

Although the distance and dimensions of the holes 2 and 3 vary depending on the mold dimensions, the protrusion dimension of the portion projected into the cavity 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 separate delivery hole may be provided depending on the case.

The take-out tape 1 with the holes 2 and 3 punched therein by a puncher 4 is separated into a fixed platen and a movable platen using an automatic transfer device 6 provided on both sides of a mold 5 attached to a molding machine A. It is sent between molds 5a and 5b. Then, together with the take-out tape 1, the split molds 5a and 5b are
Close the mold, fit the positioning hole 3 into the positioning pin 7, overlap the punch hole 2 with the cavity 8, and attach the attached piece 1.
A is placed in a protruding position in the cavity 8.

Next, the cavity 8 is injected and filled with molten resin to form a molded product 9, and the molded product 9 is attached to the attachment piece 1a. Then, the split molds 5a and 5b are opened to release the molded product 9. At this time, the molded product 9 remains attached to the take-out tape 1, so the automatic transfer device 6 sends out the molded take-out tape 1 together with the molded product 9, and there is a continuous line between the split molds 5a and 5b. Position a new portion of the take-out tape 1.

Molded product 9 transferred from the mold 5 in this way
The tape is transported to the next process such as assembly together with the take-out tape 1, or it is cut into a predetermined length and stored in a packaging container, or it is wound up and stored as shown in FIG.

At this time, a marking device 11 is provided between the mold 5 and the transfer device 6, which is activated by a signal from a quality determining device 10 included in the molding machine. This device is installed at a position that is twice or more than the feeding pitch of the take-out tape 1 from the cavity 8, and marks the guide portion 11a of the take-out tape and the defective product mark on the take-out tape near the defective product 9a on the take-out tape 1. It has a punching cylinder 11b for punching barrel holes 12.

When the quality determination device 10 on the molding machine side determines that the product 9a is defective, a defective product detection signal is issued, and the defective product 9a is transported together with the take-out tape and reaches the marking device 11. Then, the punching cylinder 11b is operated and a hole 12 for indicating a defective product is made in the take-out tape 1 near the defective molded product.

Therefore, when inspecting in the next step, the quality of the molded product can be determined by checking the presence or absence of holes using a phototube or the like.

In this embodiment, holes 12 were punched in the take-out tape 1 for marking, but the marks may be printed with codes, symbols, colors, or the like. In addition, the quality determination in the next process is not limited to phototubes; optical or magnetic means such as barcode readers and image sensors can also be used.Furthermore, quality determination on the molding machine side can be performed using hydraulic pressure during injection, material filling time, etc. Known means based on monitoring of screw position, material filling pressure, etc. may be used, and the feeding direction of the take-out tape may also be in the vertical direction with respect to the mold.

[Effects of the Invention] In this invention using the above method, markings are applied to molded products that are determined to be defective by the quality determination device on the molding machine side when determining quality in the next step after molding. Therefore, it is possible to easily determine whether the molded product is good or bad by removing the molded product with the display mark, and it is also easy to automate the quality determination.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram illustrating the method of the present invention, FIG. 2 is a partial surface view of a take-out tape, and FIG. 3 is a schematic perspective view of the apparatus used in the present invention. 1... Removal tape, 1a... Adhesive piece, 2... Punch hole, 3... Positioning hole, 4... Puncher, 5
... Mold, 5a, 5b ... Separation mold, 6 ... Automatic transfer device, 7 ... Positioning pin, 8 ... Cavity, 9 ... Molded product, 10 ... Quality determining device, 11
... Marking device, A ... Molding machine, 12 ...
hole.

Claims (1)

[Claims] 1 A take-out tape made of paper or synthetic resin is sent between the molds, the mold is closed together with the take-out tape, a part of the take-out tape is positioned in the cavity, and resin is injected into the cavity to produce the molded product. At the same time as molding, the molded product is attached to a take-out tape, and when the mold is opened, the mold is released and the molded product is transported outside the mold together with the take-out tape, and the molded product is detected by the quality determination device on the molding machine side. A method for taking out and transporting molded products, characterized in that a marking device activated by a defective product detection signal marks and displays a mark on a takeout tape at or near the defective product.