JPH0780891A - Manufacture of wheel cap made of resin - Google Patents

Manufacture of wheel cap made of resin

Info

Publication number
JPH0780891A
JPH0780891A JP25493893A JP25493893A JPH0780891A JP H0780891 A JPH0780891 A JP H0780891A JP 25493893 A JP25493893 A JP 25493893A JP 25493893 A JP25493893 A JP 25493893A JP H0780891 A JPH0780891 A JP H0780891A
Authority
JP
Japan
Prior art keywords
resin
cavity
transfer foil
wheel cap
film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP25493893A
Other languages
Japanese (ja)
Inventor
Soichiro Asada
Toshiyuki Matsunami
壮一郎 朝田
俊之 松波
Original Assignee
Pacific Ind Co Ltd
太平洋工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pacific Ind Co Ltd, 太平洋工業株式会社 filed Critical Pacific Ind Co Ltd
Priority to JP25493893A priority Critical patent/JPH0780891A/en
Publication of JPH0780891A publication Critical patent/JPH0780891A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14827Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using a transfer foil detachable from the insert

Abstract

PURPOSE:To express various designs by the use of one cavity by performing molding while holding a film, on which microscopic recesses and protrusions are printed with a thermosetting resin so as to have a specified thickness, between a cavity and a transfer foil and carrying out in-mold transfer processing while forming the microscopic recesses and protrusions on the transfer foil. CONSTITUTION:An inner face of a cavity 4 buried in a mold base 5 is flatly machined. A core 4' has a recess 1b for molding a wheel cap and is provided with a resin injection hole 1c. A film 3 is printed with a thermosetting resin so as to have a thickness of 10-60 mum to form microscopic recesses and protrusions 3b on an upper surface of a base sheet 3a made of resin. The surface having these microscopic recesses and protrusions 3b is directed to the side of a base film 2a of a transfer foil 2 and arranged so that the recess 1b' of the core 4' is positioned on the side of a bonding layer 2d of the transfer foil 2. When resin is injected, the transfer foil 2 and the film 3 are pressed against the inner face of the cavity 4 by the injection force, and a recess and protrusion pattern is transferred onto the surface of a wheel cap.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a resin wheel cap in which a pattern or minute unevenness is transferred by in-mold transfer molding at the same time as resin molding.

[0002]

2. Description of the Related Art The applicant of the present application previously applied for a wheel cap in which a transfer foil is integrally formed on the front surface or the back surface of the wheel cap by in-mold transfer processing (Japanese Patent Laid-Open No. 4-7).
No. 1943).

A conventional method for manufacturing a wheel cap will be described in detail below. 3 to 4 are vertical cross-sectional views of a conventional method in which a resin wheel cap surface is painted simultaneously with injection molding by an in-mold molding device (not shown) having an injection molding machine and a transfer foil feeding device. FIG. 3 is a side view, FIG. 3 shows a state before molding, and FIG. 4 shows a state after molding. The wheel cap 1 is composed of a resin layer 1a formed of a resin material such as polypropylene, ABS, polycarbonate, and modified PPO, and a transfer foil 2 integrated on the surface of the resin layer 1a by in-mold transfer processing. .

The transfer foil 2 includes a base film 2a for continuously feeding the transfer foil during in-mold transfer processing, and a release layer 2b made of a resin material having excellent releasability from the base film 2a. It is composed of a bright film having an aluminum vapor-deposited surface as a base material, a colored layer 2c provided with a pattern by printing, and an adhesive layer 2d welded to the resin layer 1a. In the conventional method, the wheel cap 1
In order to give the surface of the mold a minute unevenness with a depth of 0.01 to 0.3 mm, the inner surface of the cavity 4 incorporated in the mold base 5 has an uneven surface 4a such as texture and spin processing.
Then, the resin is pressed into the uneven surface 4a of the cavity 4 through the transfer foil 2 from the core 4 ', and the resin layer 1a is molded to express a design with unevenness on the entire surface of the wheel cap 1. ing.

[0005]

As described above, in the case where the inner surface of the cavity 4 is provided with the uneven surface 4a and the depth is as deep as 0.5 to 1.0 mm, even the steel material type does not have any problem in processing. There is no problem, but the depth is 0.01-0.3mm as mentioned above.
If it is very small, uneven processing irregularities will occur, so it is unavoidable to resort to electroforming. In this case, as the master model, unevenness in processing occurs unless a material having a relatively low hardness is used. Therefore, for example, brass having a low hardness is cut to form a minute unevenness having a depth of 0.01 to 0.3 mm. The cavity 4 is manufactured by processing the surface, reversing the surface by electroforming nickel, and incorporating the cavity 4 into the mold base 5. However, in order to use electroforming in the die processing, since the hardness of nickel electroforming (HRC20 to 30) is lower than that of the steel material die (HRC50), it is easily scratched, and the uneven surface 4a of the mass production is sagged. There are always dangers such as. In addition, when scratches or fatigue are caused, it cannot be corrected because a special process called electroforming is used, and it takes about 40 days to remanufacture, which is not suitable for mass production. In addition, the inner surface of the cavity 4 has a depth of 0.01-0.
It is necessary to remake the mold cavity 4 again because the design cannot be changed once the textured surface with a depth of 3 mm and the minute uneven surface 4a such as spin processing is applied, so it takes a lot of time and cost. There was a problem of being lost.

[0006]

In order to solve the above-mentioned problems, the present invention, when applying the in-mold transfer processing to the wheel cap 1, makes it possible to perform minute processing such as graining and spin processing on the inner surface of the cavity 4. Without processing the uneven surface 4a, a separate film 3 having the minute unevenness 3b printed on the base sheet 3a with a thermosetting resin is sandwiched between the cavity 4 of the mold and the transfer foil 2. The present invention provides a method for manufacturing a wheel cap, which is characterized by molding. That is, the resin wheel cap of the present invention is a transfer for applying a pattern between the cavity 4 and the core 4 ′ of the mold when in-molding the wheel cap 1 made of a resin material. Foil 2
And a thickness of 10 to 60 μm on the upper surface of the resin base sheet 3a.
m of thermosetting resin sandwiches a separate film 3 on which the minute irregularities 3b are printed, presses the resin layer 1a from the core 4 ', and simultaneously forms irregularities on the transfer foil 2 by the minute irregularities 3b of the film 3. Meanwhile, the transfer foil 2 is formed on the surface of the wheel cap 1 by in-mold molding.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for manufacturing a wheel cap, which is an embodiment of the present invention, will be described in detail below with reference to FIGS. FIG. 1 is a vertical cross-sectional side view showing a state before molding of an embodiment of the present invention. The cavity 4 is embedded in the mold base 5, and its inner surface is processed flat.
The film 3 is drawn on a straight line in order to simplify the drawing. The film 3 is used for substituting a fine uneven surface 4a such as texture and spin processing formed on the inner surface of the conventional cavity 4. The film 3 has a thickness of 5
0 μm polyethylene terephthalate base sheet 3
A thermosetting resin having a thickness of 10 to 60 μm is printed on the upper surface of “a”, and the microscopic unevenness 3b is formed by thermally curing the thermosetting resin in a heating furnace. The transfer foil 2 is composed of a base film 2a, a peeling layer 2b, a coloring layer 2c and an adhesive layer 2d as in the conventional product. The core 4'is a concave portion 1 having a shape that forms the claw 1b and the wheel cap 1 at the center of the entire surface.
b ', and a resin injection hole 1c is provided at the center of the rear surface. As the resin forming the wheel cap 1, a molding resin material such as polypropylene, ABS, polycarbonate or modified PPO can be used.

Next, the in-mold molding method of the present invention will be described. In the film 3 of the present invention, the surface of the minute unevenness 3b is directed to the base film 2a side of the transfer foil 2 as shown in FIG. Each of them is set in a pressure contact state so that the surfaces of are positioned. When the resin is injected from the resin injection hole 1c of the core 4'in this state, the transfer foil 2 and the film 3 are pressed against the inner surface of the capital 4 by the injection pressure at the time of injection, and the surface of the wheel cap 1 has an uneven pattern. Is transcribed. After molding, the core 4'is returned, and each member is separated as shown in FIG. 2 to obtain the wheel cap 1 having the claw 1b on the back surface and integrally having the uneven surface 4a on the front surface by in-molding. The base film 3
In order to prevent damage at the time of in-mold molding, it is appropriately fed by a feeding device (not shown) different from the transfer foil. Note that the film 3 on which the minute unevenness pattern is printed and the base film 2a of the transfer foil do not remain on the molded product side (the surface of the wheel cap).

[0009]

Since the present invention is configured as described above, (1) the present invention sandwiches the film 3 having the minute irregularities 3b printed with a thermosetting resin between the cavity 4 and the transfer foil 2. Since it is molded, the mold cavity 4
Since the inner surface of the can be flat and a material with high hardness can be used, fatigue and scratches can be prevented, so it can withstand mass production. (2) In addition, since the cavity 4 of the mold does not need to process a complicated design on the inner surface, even if the cavity 4 is damaged and becomes unusable, electroforming is not required and remanufacturing is not required. It's extremely easy. (3) In the conventional construction method, one cavity 4 can express only one kind of design, but in the present invention, by changing the design pattern of the minute unevenness 3b of the film 3, one cavity is formed. A wide variety of designs can be expressed with Tee 4.

[0010]

As can be understood from the above description, when the wheel cap is in-molded, the surface of the work piece is patterned with the minute unevenness 3b on the surface of which is formed separately. Since it is carried out via 3, the durability of the cavity 4 is improved, so that mass productivity is improved,
In addition, it is possible to reduce the time and cost when manufacturing the cavity 4, and by changing the design of the film 3, it is possible to express a wide variety of designs with one cavity, and the practical effect is extremely large. It is a thing.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view of a state before molding by the method of the present invention.

FIG. 2 is a vertical sectional side view of a separated state after molding by the method of the present invention.

FIG. 3 is a vertical cross-sectional side view of a state before molding by a conventional construction method.

FIG. 4 is a vertical sectional side view of a separated state after molding by a conventional method.

[Explanation of symbols]

1 Wheel cap center emblem. 1a
Resin layer. 1b Claw. 1b 'recess. 1c Resin injection hole. 2 Transfer foil. 2a Base film. 2b Release layer. 2c patterned layer. 2d adhesive layer. 3 A film with fine irregularities printed on it. 3a Base sheet.
3b Micro unevenness. 4 cavities. 4'core.
4a Micro unevenness. 5 Mold base.

Claims (1)

[Claims]
1. A transfer foil 2 for transferring and painting a pattern between a cavity 4 and a core 4'of a mold for in-molding a wheel cap 1 made of a resin material, and a resin-made transfer foil. On the upper surface of the base sheet 3a of
A separate film 3 on which the minute irregularities 3b are printed with a thermosetting resin of 0 to 60 μm is sandwiched, and the resin layer 1a is pressed from the core 4 ′, and at the same time, the transfer foil 2 is irregularized by the minute irregularities 3b of the film 3. A method for manufacturing a resin wheel cap, which comprises in-molding the transfer foil 2 on the surface of the wheel cap 1 while forming.
JP25493893A 1993-09-16 1993-09-16 Manufacture of wheel cap made of resin Pending JPH0780891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25493893A JPH0780891A (en) 1993-09-16 1993-09-16 Manufacture of wheel cap made of resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25493893A JPH0780891A (en) 1993-09-16 1993-09-16 Manufacture of wheel cap made of resin

Publications (1)

Publication Number Publication Date
JPH0780891A true JPH0780891A (en) 1995-03-28

Family

ID=17271946

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25493893A Pending JPH0780891A (en) 1993-09-16 1993-09-16 Manufacture of wheel cap made of resin

Country Status (1)

Country Link
JP (1) JPH0780891A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004041833A1 (en) * 2004-08-27 2006-03-02 Leonhard Kurz Gmbh & Co. Kg Decorated injection molded article, method of making a decorated injection molded article, and transfer sheet for use in such method
EP2072213A1 (en) * 2007-12-11 2009-06-24 FIH (Hong Kong) Limited Multi-layered molded article with decorative layer and method
EP2072215A1 (en) * 2007-12-20 2009-06-24 FIH (Hong Kong) Limited Method for making multi-layered molded articles
CN101746016A (en) * 2008-12-11 2010-06-23 三星电子株式会社 Injection molding system and injection molding method
JP2017159524A (en) * 2016-03-09 2017-09-14 パナソニックIpマネジメント株式会社 Film for in-mold molding, and method and apparatus for producing in-mold molded article

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004041833A1 (en) * 2004-08-27 2006-03-02 Leonhard Kurz Gmbh & Co. Kg Decorated injection molded article, method of making a decorated injection molded article, and transfer sheet for use in such method
US7906054B2 (en) 2004-08-27 2011-03-15 Leonhard Kurz Stiftung & Co. Kg Decorated injection-moulded article, method for producing one such article, and transfer film for using in one such method
EP2072213A1 (en) * 2007-12-11 2009-06-24 FIH (Hong Kong) Limited Multi-layered molded article with decorative layer and method
JP2009143222A (en) * 2007-12-11 2009-07-02 Sutech Trading Ltd Molded article with leather cloth, and its manufacturing process
EP2072215A1 (en) * 2007-12-20 2009-06-24 FIH (Hong Kong) Limited Method for making multi-layered molded articles
CN101746016A (en) * 2008-12-11 2010-06-23 三星电子株式会社 Injection molding system and injection molding method
JP2017159524A (en) * 2016-03-09 2017-09-14 パナソニックIpマネジメント株式会社 Film for in-mold molding, and method and apparatus for producing in-mold molded article

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