JPS62227613A - Manufacture of both-sided transfer-printed molded item and mold mechanism - Google Patents

Abstract

PURPOSE:To easily obtain both-sided transfer-printed molded items with various shapes by a method wherein a hole for injecting synthetic resin is provided on a transfer film A on a stationary mold side and pinched together with a transfer film B on a movable mold side, which can freely meet and part, between the cavity constitutional surfaces of the stationary mold and of the movable mold so as to inject the resin between the films. CONSTITUTION:A hole H for injecting synthetic resin is provided on a transfer film A on a stationary mold 1 side at the position before entering a molding part 61 by one cycle with a punching mechanism 3. Next, the transfer film A is clamped to the stationary mold 11 by shifting a guide clamp 71. Next, a movable platen 21 is advanced so as to close the molds in order to pinch the transfer films A and B between the stationary mold 1 and a movable mold 2. After the completion of mold closing, the synthetic resin injected from an injection nozzle 14 enters between the transfer films A and B so as to transfer- print patterns on the transfer films A and B onto both the front and rear surfaces of a molded item simultaneously with molding. Accordingly, a both- sided transfer-printed molded item can easily be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for manufacturing a double-sided transfer molded product and a mold mechanism. More specifically, the present invention relates to a method for manufacturing a double-sided transfer molded product that easily obtains a synthetic resin molded product having transfer printing on both sides, and a mold mechanism suitable for use in the manufacturing method.

<Prior Art> Conventionally, a method for manufacturing a transfer molded article in which transfer printing is performed simultaneously with molding, and a mold used in the manufacturing method are well known. For example, Japanese Patent Publication No. 57-22272 and Japanese Patent Publication No. 57-2
This is disclosed in JP 05222 and the like. The inventions disclosed in these publications fuse and integrate a molded product and a transfer film using an injected synthetic resin.
All of these merely relate to a method of manufacturing a transfer molded article in which transfer printing is performed on only one side at the same time as molding, and a mold used in the manufacturing method. In other words, the above-mentioned publication does not disclose any invention regarding a method for manufacturing a transfer molded product with transfer printing on both sides by performing transfer printing at the same time as molding, or a mold suitable for use therein. be.

However, with the diversification of transfer-printed information and the increase in the amount of information, it has become difficult to obtain products with transfer printing on both sides of transfer-molded products, such as magnetic cards, various panels such as automobile front panels, etc., using a simple method. The need for this has increased recently.

In order to meet these demands, a method of transfer printing on both sides of the molded product at the same time as molding was proposed.
This invention is disclosed in Japanese Patent Publication No. 579, (1) Japanese Patent Publication No. 57-55056, and (2) Japanese Patent Application Publication No. 120432/1983.

<Problems to be solved by the invention> However, all of these inventions have the following problems.

In other words, since the invention (2) uses a mold having a structure in which the transfer film is slid along the inner wall surface of the mold through a hole, it has the problem that it is limited to the method of manufacturing blow molded products. there were.

Furthermore, since the invention (2) uses a core as a mold, there is a problem in that it is limited to the method of manufacturing molded products of special shapes such as knobs.

Furthermore, in the invention (2), since the transfer film must be preformed by vacuum forming or other means to form voids for injecting the synthetic resin, the mold for preforming is difficult to use. In addition, there have been problems in that there are many factors that increase costs, such as the need to thickly comb the transfer film for vacuum forming.

Means for Solving the Problems> Therefore, as a result of various studies in view of the above-mentioned problems, the present inventor has developed a double-sided transfer molded product that can easily produce double-sided transfer molded products of various shapes by versatile injection molding. He invented a method for manufacturing molded products and a mold mechanism suitable for use in the manufacturing method.

That is, the method for manufacturing a double-sided transfer molded product according to the present invention includes (al
The drilling mechanism 3 provided on the fixed mold 1 side allows the fixed mold l
Film supply and positioning provided on the side.

A step of providing holes 1 for synthetic resin injection in the transfer film A fed out from the feed roll 41 of the mechanism 4, (C) positioning the transfer film B sent out from the delivery roll 51 of the film supply/positioning mechanism 5, between the cavity 6 forming surfaces 12.22 of the fixed mold 1 and the movable mold 2; It has a sprue runner 72 that can communicate with the sprue runner 13 part of the fixed mold 1 and the cavity 6 part,
and a first for bringing the transfer film A into close contact with the fixed mold 1.
A guide clamp 71 configured to be movable between the position and a second position allowing passage to the transfer film,
The transfer film A is transferred to the sprue runner 13 of the fixed mold 1 and the sprue runner 7 of the guide clamp 71.
(d) Clamping the fixed mold 1 and the movable mold 2 so that the holes 1 of the transfer film A coincide with the two parts; (d) Closing the fixed mold 1 and the movable mold 2; +
6) Inject synthetic resin between the two transfer films A and B positioned between the cavity forming surfaces 12.22 through the sprue runner 13 of the fixed type l and the sprue runner 72 of the guide clamp 71. The method is characterized by comprising a step of opening the fixed mold 1 and the movable mold 2.

Further, the mold mechanism according to the present invention includes a pair of fixed mold l and movable mold 2 that can be separated from each other, and two transfer films between the cavity forming surfaces 12 and 22 of the fixed mold 1 and the movable mold 2. A
, B intermittently, a film supply/positioning mechanism 4 provided on the fixed mold 1 side and the movable mold 2 side, respectively.
．． 5, and a hole punching mechanism 3 provided on the fixed mold 1 side for providing a hole for injection of synthetic resin in the transfer film A;
Sprue runner 13 part of fixed mold 1 and the cavity 6
The guide has a sprue runner 72 that can be communicated with the fixed mold 1 and is configured to be movable between a first position where the transfer film A is brought into close contact with the fixed mold 1 and a second position where the transfer film A is allowed to pass through. The transfer film A is fixed such that the holes of the transfer film A are aligned between the sprue runner 13 part of the fixed mold 1 and the sprue runner 72 part of the guide clamp 4!1tI7. It is characterized by being clamped to a mold.

Next, embodiments of the present invention will be described in detail using the drawings.

The pair of fixed die 1 and movable die 2 are configured so that the fixed die 1 is attached to the fixed platen 11 and the movable die 2 is attached to the movable platen 21, respectively, and can be separated from each other. The fixed mold 1 and the movable mold 2 shown in FIG. 1 are multi-cavity molds having two molding portions 61 capable of molding two molded products at the same time.

The fixed platen 11 and the movable platen 21 are each provided with a film supply/positioning mechanism 4.5 for intermittently supplying the transfer films A, 13 and accurately positioning them at predetermined locations. The film supply/positioning mechanism 4.5 is
movable frames 42.5 each horizontally movable
It has a feed roll 41, 51, a guide roll 43, 53, and a take-up roll, a dancer roll, a tension □ roll, etc. (not shown) provided on 2, and transfers the two transfer films A and B to a fixed type. 1 and the movable mold 2 at a predetermined location between the cavity forming surfaces 12 and 22, facing each other.

Film supply/positioning mechanism 4 provided on fixed all
A hole punching mechanism 3 is provided on the movable frame 42 for forming a hole 60 for injection of synthetic resin in the transfer film 8 sent out from the delivery roll 41 on the side of the fixed mold 1 (see Fig. 2). ).

This perforation mechanism 3 is arranged to perforate a predetermined position one cycle before the transfer film A enters the molding process. This drilling mechanism 3 includes a case 31, a receiving blade 32 attached to the case, and a pushing blade 33 that can be fitted into the inner diameter part of the receiving blade 32 that is movably supported within the case 31. 33 is driven by a motor via a crank mechanism (not shown) to reciprocate. As a result, a circular hole H is formed in the transfer film A.

The cut pieces punched out by the pusher blade 33 are removed by a chute (not shown).

A guide clamp mechanism 7 is provided between the fixed mold 1 and the movable mold 2.
is provided. This guide clamp mechanism 7 is attached to the fixed mold 1 so as to be movable between a first position where the transfer film 8 is brought into close contact with the fixed mold 1 and a second position where the transfer film 8 is allowed to pass through. It is configured to be guided by two guide pins 73 (see FIG. 4).

A recess 74 is formed in the movable mold 2 at a position facing the guide clamp 71 (see FIG. 5).

The guide clamp mechanism 7 has a sprue runner 72 therein, one end of which is configured to communicate with the fixed sprue runner 13 section, and the other end communicated with the cavity 6 section (Fig. 3). reference).

The sprue runner 72 portion of the guide clamp mechanism 7 is configured to come into contact with the opening of the sprue runner 13 portion of the fixed type 1 when the guide clamp 71 is in the first position. The sprue runner 13 portion of the stationary mold 1 is configured to come into contact with an injection nozzle 14 configured to be able to enter the center of the stationary mold 1 from the stationary platen 11 side.

Note that the shape of the sprue runner 72 provided inside the guide clamp 71 may be appropriately designed depending on the shape of the molded product, etc.

<Effect> Next, the operation of the above embodiment will be explained.

First, the transfer films A and B are positioned by the action of the film supply/positioning mechanism 4.5.

Next, a hole () for synthetic resin injection is provided in the transfer film A on the fixed mold 1 side using the hole punching mechanism 3 at a position one cycle before entering the molding section 61. In order to ensure accuracy, it is preferable to carry out the transfer with the transfer film A accurately positioned.

Next, inside the mold, the guide clamp 71 is moved to the second position.
Fixed mold 1 by moving from position to first position
The side transfer film 8 is clamped to the fixed mold 11. At this time, the transfer film A is clamped between the sprue runner section 13 of the fixed mold 1 and the sprue runner section 72 of the guide clamp 71 so that the 611 to the transfer film is aligned.

Next, the movable platen 21 is moved forward to close the fixed mold 1 and the movable mold 2. By doing so, the transfer films A and B are sandwiched between the fixed mold 1 and the movable mold 2.

After the mold is closed, synthetic resin is injected from the injection nozzle 14 of the fixed platen 11. The synthetic resin injected from the injection nozzle 14 is applied to the sprue runner 13 of the fixed mold 1, the hole H of the transfer film A, and the sprue runner 7 of the guide clamp 71.
2, and enters between the transfer film parts A and 8, which are positioned facing each other between the cavity forming surfaces 12.22 of the fixed mold 1 and the movable mold 2.

By doing this, the transfer film A is applied to the front and back surfaces of the molded product at the same time as the molded product is molded.

Transfer print the pattern on B.

After molding, it is cooled and then the mold is opened.

The molded product is taken out together with the sprue of the guide clamp 71 and the sprue of the fixed mold 1 by an ejecting mechanism (not shown).

After the double-sided transfer molded product is taken out, transfer film A,
B is sent by a predetermined amount by a delivery roll 41.51 and a take-up roll (not shown).

With the above steps, one cycle is completed.

The transfer films A and B used in the present invention are provided with a release layer on a base sheet, and a pattern layer and a pattern layer on top of the release layer.
Those having a layered structure including a metal thin film layer, an adhesive layer, etc. are common.

In the above example, the transfer film A was punched one cycle before the molding process, but it can also be done at the same time as the fixed mold 1 and the movable mold 2 are closed. It is also possible to incorporate the mechanism into the device (see Japanese Patent Application Laid-open No. 194848/1983). The hole may have any shape as long as it allows the injected synthetic resin to pass through the transfer film 8 and enter between the transfer films A and B, and may be, for example, a fine hole formed by a needle-like blade.

Furthermore, one of the film supply/positioning mechanisms 4.5 may be mounted in the vertical direction and the other in the horizontal direction so that they do not interfere with each other when closing the mold.

Furthermore, although the above explanation has been made regarding a multi-piece molded product having two molded parts 61, it is also possible to apply it to, for example, a disc-shaped molded product centered on the sprue runner 72 part of the guide clamp 71. .

<Effects of the Invention> Since the present invention has the above configuration, it has the following effects. That is, according to the present invention, by versatile injection molding,
It becomes possible to easily obtain transfer molded products having transfer printing applied on both sides of various shapes.

Therefore, according to the present invention, transfer molded products having transfer printing on both sides, such as magnetic cards, various panels such as automobile front panels, etc. can be obtained by a simple method.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a mold mechanism according to an embodiment of the present invention, and FIG.
The figure is an enlarged sectional view of the drilling mechanism, Fig. 3 is an enlarged sectional view of the vicinity of the guide clamp mechanism, Fig. 4 is a sectional view taken along line IV-IV in Fig. 1, and Fig. 5 is an enlarged sectional view of the part shown in Fig. 1. A cross-sectional view along the line is shown. ■... Fixed mold 2... Movable mold 3... Drilling mechanism 4... Fixed mold side film supply/positioning mechanism 5 Movable mold side film supply/positioning mechanism 6... Cavity 7... Guide clamp Mechanism A, B... Transfer film ■... Hole for synthetic resin injection Patent applicant: Hiki Photo Printing Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) (a) Drilling mechanism provided on the fixed mold [1] side (
3), a hole for synthetic resin injection (H
), (b) from the feed roll (51) of the film supply/positioning mechanism (5) provided on the side of the movable mold (2) that can be separated from the transfer film A and the fixed mold [1]; (c) positioning the sent-out transfer film B between the cavity (6) constituent surfaces of the fixed mold [1] and the movable mold (2); (c) placing the transferred film B on the sprue runner (13) of the fixed mold [1]; ) part and the cavity (6) part, and has a sprue runner (72) that can communicate with the fixed mold (1) and a first position that brings the transfer film A into close contact with the fixed mold (1) and a second position that allows the transfer film A to pass through. The transfer film A is moved between the sprue runner (13) of the fixed mold [1] and the sprue runner (71) of the guide clamp (71) by a guide clamp (71) configured to be movable between two positions. 72) a step of clamping the transfer film A to the fixed mold (1) so that the holes (H) of the transfer film A are aligned with the parts; (d) the fixed mold [1];
] and closing the movable mold (2); (e) applying synthetic resin between the two transfer films A and B positioned between the cavity forming surfaces (12, 22); [1] Injecting through the sprue runner (13) and the sprue runner (72) of the guide clamp (71); (f) opening the fixed mold [1] and the movable mold (2); A method for manufacturing a double-sided transfer molded product characterized by: (2) A pair of fixed mold [1] and movable mold (2) that can be separated from each other, and two transfer sheets between the cavity forming surfaces (12, 22) of the fixed mold [1] and movable mold (2) Film A, B
The fixed mold [1] side and the movable mold (2
) side and film supply provided respectively. The positioning mechanism (4, 5), the punching mechanism (3) provided on the fixed mold [1] side to provide holes (H) for injection of synthetic resin in the transfer film A, and the A fixed type [1] having a sprue runner (72) that can communicate with the sprue runner (13) part and the cavity (6) part;
The fixed type (1) has a guide clamp mechanism (7) configured to be movable between a first position where the transfer film A is brought into close contact with the transfer film A and a second position where the transfer film A is allowed to pass through.
The transfer film A is placed in a fixed mold (1 ) A mold mechanism characterized by being clamped to the mold.