JPH09207165A - Manufacture of two-color molding simultaneous two-stage decorating article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently produce a two-color molding simultaneous two-stage decorating article in which a good-looking pattern is formed at least on one material of a material of different materials. SOLUTION: A primary molding resin part 21 is molded by clamping a cavity mold 5 for primary molding in which a primary transfer sheet is arranged and a core mold 4, the cavity mold 5 and the core mold 4 are demolded, a substrate sheet is peeled off, the resin part 21 to which a primary transfer layer 30 adheres is separated from the cavity mold 5, the core mold 4 with which the resin layer to which the transfer layer 30 adheres is closely contacted and a cavity mold 6 for secondary molding in which a secondary transfer sheet is arranged are clamped, and a secondary molding resin part is molded. Moreover, the cavity mold 6 and the core mold 4 are demolded, the substrate sheet is peeled off, the secondary molding resin part to which a secondary transfer layer adheres is molded, and a two-color molding simultaneous two-stage decorating article is taken out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a two-color molded simultaneous two-step painting product used for front panels and cases of AV equipment and home appliances, buttons, instrument panels and buttons of automobiles, and the like.

[0002]

2. Description of the Related Art Conventionally, as a method for manufacturing a product such as an input button of a computer, two kinds of molten molding resins having different colors and materials are sequentially injected from two nozzles of one injection molding machine, There is a so-called two-color molding method for producing a two-color molded product in which two different types of molding resin parts are joined. Also,
A decorative sheet having a pattern layer or the like formed on a base sheet is closed and sandwiched, and a molten molding resin is injection-molded, and at the same time, the decorative sheet is adhered to a resin molded product to obtain a simultaneous molded product. There is a molding simultaneous painting method.

[0003]

As the design expression by the former two-color molding method, there are two colors or two types depending on the color and material of the resin to be injection-molded. It didn't work. In the latter,
Even if the design is satisfied by the pattern of the transfer layer, the material is limited to a single material. For example, it was not possible to obtain a button having a button made of a thermoplastic elastomer resin in an audio panel made of an ABS resin, and having a multicolored and beautiful design applied to any resin. In addition, in the case of insert molding, a primary molded product (for example, a product with simultaneous molding) is obtained in advance, and this is then inserted (placed) in a secondary molding die in a separate process, and the secondary molding resin There is also a method of injection molding, but since the secondary molding is carried out with the lapse of time after obtaining the primary molded product, there are the following problems and it is practically not practiced. 1. It is difficult to insert into the secondary molding die due to shrinkage strain of the primary molded product. Or it may not be possible. 2. Since the secondary molded product is molded after the primary molded product has cooled, close contact between the primary molded product and the secondary molded product is not possible. Alternatively, since the adhesion between the primary molded product and the secondary molded product is poor, there is a problem that the insert sheet peels off at the interface between the primary molded product and the secondary molded product in the durability test. 3. Painting can be performed only on the primary molded product side (positioning with the secondary molded product becomes a problem). 4. The process is separated and the cost increases.

An object of the present invention is to efficiently produce a two-color molding simultaneous two-stage decorative product in which a good-looking pattern is formed on one or both of different materials.
An object of the present invention is to provide a method for producing a two-stage color-imaging colored article.

[0005]

In order to achieve the above object, a method for producing a two-color molding simultaneous two-stage decorative article of the present invention is, as described in claim 1, a primary molding resin injection path. A core mold having a secondary molding resin injection path, a primary molding cavity mold in which a primary transfer sheet having a primary transfer layer laminated on a base sheet is arranged, and a secondary transfer layer on the base sheet. First, a primary molding cavity mold in which a primary transfer sheet is arranged by using a two-color molding simultaneous two-stage painting apparatus equipped with a secondary molding cavity mold in which laminated secondary transfer sheets are arranged. And the core mold are closed, the primary molding resin is injected into the primary molding cavity to mold the primary molding resin portion, and then the primary molding cavity mold and the core mold are opened. Then, the base sheet was peeled off, and the primary transfer layer was adhered to 1
The next molding resin part is separated from the cavity mold for primary molding,
Next, the core mold in which the primary molding resin portion to which the primary transfer layer is adhered is still in close contact with the secondary molding cavity mold in which the secondary transfer sheet is arranged, and the secondary molding cavity is closed. The secondary molding resin is injected into it to mold the secondary molding resin part,
Next, the cavity mold for secondary molding and the core mold are opened,
The base sheet was peeled off, the secondary molding resin part to which the secondary transfer layer was adhered was molded, and the two-color molding simultaneous two-stage decorative article was taken out.

Further, as described in claim 2, as the primary molding resin and the secondary molding resin, resins having mutually different colors are used.

Further, as described in claim 3, as the primary molding resin and the secondary molding resin, resins having mutually different hardnesses are used.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An example of the present invention will be described in detail below with reference to the drawings. For convenience of explanation, the transfer sheet and the two-color molding simultaneous two-step painting device used in the method for producing the two-color molding simultaneous two-stage painting product of the present invention will be described first.

Specific examples of the primary transfer sheet 1 and the secondary transfer sheet 27 will be described. The primary transfer sheet 1 is basically a base sheet on which a primary transfer layer 30 is formed.
The secondary transfer sheet 27 is basically a base sheet on which the secondary transfer layer 31 is formed. Primary transfer layer 30,
The secondary transfer layer 31 includes a release layer, a pattern layer, and
The adhesive layers are laminated in this order. Examples of the material of the base sheet include various resins such as polyethylene terephthalate, acrylic, and thermoplastic elastomer. The release layer may be made of a polyacrylic resin or the like. When the release layer is required to have hardness, an ionizing radiation curable resin such as an ultraviolet curable resin may be used. The ionizing radiation-curable resin may be used alone, or may be used as a mixture with another resin. The picture layer uses a resin binder and a pigment or a dye. The picture layer may use a resin binder and a metal pigment or an inorganic pigment having a masking property. For the adhesive layer, a heat-sensitive or pressure-sensitive resin suitable for the materials of the primary molding resin 20 and the secondary molding resin 23 is appropriately used. For example, when the primary molding resin 20 is an acrylic resin and the secondary molding resin 23 is a urethane resin, vinyl chloride-vinyl acetate copolymer resin may be used as the adhesive layer. The peeling layer, the pattern layer, and the adhesive layer are formed by various printing methods. The transfer sheet may have an adhesive layer including a primary adhesive portion that adheres to the primary molding resin 20 and a secondary adhesive portion that adheres only to the secondary molding resin 23. The transfer sheet may be one in which the adhesive layer includes only the primary adhesive portion that adheres to the primary molding resin 20. A portion of the transfer sheet corresponding to the secondary molding resin portion may be cut out. The transfer sheet may be cut into individual sheets or may be rolled up. The primary pattern layer and the adhesive layer are laminated in this order on the base sheet, and the base sheet is not peeled off 1
The next insert sheet may be used instead of the primary transfer sheet 1. The secondary transfer sheet 27 may be replaced by a secondary insert sheet in which a secondary pattern layer and an adhesive layer are laminated in this order on the substrate sheet and the substrate sheet is not peeled off.

A specific example of the two-color molding simultaneous two-stage painting apparatus will be described. The two-color molding simultaneous two-stage painting device is a core mold 4 having a primary molding resin injection path 2 and a secondary molding resin injection path 3.
And a primary molding cavity mold 5 in which the primary transfer sheet 1 is arranged, and a secondary molding cavity mold 6 in which the secondary transfer sheet 27 is arranged. If necessary, 1
A primary transfer sheet feeding device 7 for supplying the primary transfer sheet 1 and a primary transfer sheet winding device 8 may be provided on the secondary molding cavity mold 5. Also, if necessary, 2
A secondary transfer sheet feeding device 28 for supplying the secondary transfer sheet 27 and a secondary transfer sheet winding device 29 may be provided on the secondary molding cavity mold 6. The primary transfer sheet feeding device 7 and the primary transfer sheet winding device 8 for supplying the primary transfer sheet 1 do not have to be directly fixed to the primary molding cavity mold 5 or the core mold 4. The secondary transfer sheet feeding device 28 and the secondary transfer sheet winding device 29 that supply the secondary transfer sheet 27 do not have to be directly fixed to the secondary molding cavity mold 6 or the core mold 4.
The primary transfer sheet feeding device 7 and the primary transfer sheet winding device 8 can also supply the primary insert sheet between the primary molding cavity mold 5 and the core mold 4. 2
The secondary transfer sheet feeding device 28 and the secondary transfer sheet winding device 29 can also supply the secondary insert sheet between the secondary molding cavity mold 6 and the core mold 4.

The core mold 4 is preferably attached to a movable platen such as a rotary plate 9 capable of rotating or a slide plate capable of sliding (FIGS. 1 to 4). The core mold 4 is designed so that the primary molding and the secondary molding can be performed simultaneously at different places.
It is advisable to dispose one on each of the front surface of the secondary molding cavity mold 5 and the front surface of the secondary molding cavity mold. In the primary molding resin injection path, the movable platen and the injection unit 10 are combined at the position where the primary molding is performed, so that the injection unit 1
0 to the primary molding resin injection nozzle 11. The secondary molding resin injection path is connected to the secondary molding resin injection nozzle 12 of the injection unit 10 by combining the movable plate and the injection unit 10 at the position where the secondary molding is performed. The core mold 4 moves back and forth in a circular arc between the front surface of the primary molding cavity mold 5 and the front surface of the secondary molding cavity mold by the rotation of the turntable 9. The core mold 4 may be attached to a slide board and moved horizontally. The rotary disk 9 and the slide disk are fixed to the tip of a shaft 14 of a drive unit 13 mounted in the injection unit 10. The drive unit 13 rotationally drives or slides the turntable 9 via the shaft 14. In addition, the drive unit 13 includes the cavity molds 5 and 2 for the primary molding.
The rotary disk 9 and the slide disk may be driven back and forth so that the core mold 4 approaches and separates from both the subsequent molding cavity mold 6.

The primary molding cavity mold 5 and the secondary molding cavity mold 6 are mounted on a stationary platen 15. Fixed platen 15
Is fixed to the tip of the shaft 14 of the drive unit 13 mounted in the drive unit 16. Further, the drive unit 13 may drive the fixed platen 15 back and forth so that both the primary molding cavity mold 5 and the secondary molding cavity mold 6 approach and separate from the core mold 4. .

The following are specific examples of the core mold 4, the primary molding cavity mold 5, and the secondary molding cavity mold 6 of the two-color molding simultaneous two-stage painting device. (1) The primary molding cavity mold 5 has a primary molding cavity 17, and the secondary molding cavity mold 6 has a secondary molding cavity 18, which is more than the primary molding cavity 17. Some secondary molding cavities 18 are large (FIGS. 1 to 5). In this case, the core mold 4 may have the primary molding cavity 17 and the secondary molding cavity 18. The core mold 4 may have a protrusion 19 (FIGS. 1 to 5).

(2) The core mold 4 is the primary molding cavity 1
7 and the secondary molding cavity mold 6 has the secondary molding cavity 18 (FIG. 6). The core type 4 is
It has two primary molding cavities 17. In this case, the primary molding cavity mold 5 closes the secondary molding injection path of the core mold 4 by closing the mold with the core mold 4.

(3) The core mold 4 is the primary molding cavity 1
7 and a secondary molding cavity 18 (FIG. 7). In the core mold 4, the primary molding cavity 17 and the secondary molding cavity 18 may be one space (FIG. 7) or may be separate spaces. The primary molding cavity mold 5 closes the injection path for secondary molding of the core mold 4 by closing the mold with the core mold 4. The secondary molding cavity mold 6 may have a secondary molding cavity 18 or may have a protrusion.

(4) The core mold 4 has a slide block 26, and the slide block 26, the core mold 4, and the primary molding cavity mold 5 form a primary molding cavity 17.
Next, the slide block 26, the core mold 4, the secondary molding cavity mold 6 and the primary molding resin portion 21
There is one that forms the next molding cavity 18 (FIG. 8). The primary molding cavity die 5 may have the primary molding cavity 17 or may have a protrusion. The secondary molding cavity mold 6 may have a secondary molding cavity 18 or may have a protrusion. The slide block 26 may be provided in the primary molding cavity mold 5 and the secondary molding cavity mold 6.

The injection unit 10 is a horizontal molding machine (a cavity mold and a core mold of a mold are installed to face each other,
Even with horizontal molding, the vertical molding machine (cavity mold and core mold of the mold are installed facing each other up and down,
The mold may be closed vertically). A molding machine having two cylinders for plasticizing two kinds of materials, each of which has a nozzle hole for injecting a resin into a mold, may be used. The two cylinders may be parallel or opposite,
Further, they may be arranged in a right angle direction. The cylinder may be arranged either vertically or horizontally. The two core molds 4 may be lined up and down, may be lined up on the left and right, or may be lined up with the injection paths facing each other. It may be one that branches from one cylinder to two molding resin injection nozzles.

The primary transfer sheet feeding device 7 and the primary transfer sheet winding device 8 are composed of a primary molding cavity mold 5.
The long primary transfer sheet 1 in the primary molding cavity 17 of
Is supplied continuously. The transfer sheet feeding device 7 includes a primary transfer sheet 1 wound into a roll, a support rod for supporting the primary transfer sheet 1 on a fixed plate, a nip roll for feeding the primary transfer sheet 1, and a precise alignment with a cavity. It consists of sensors and so on. The primary transfer sheet winding device 8 is composed of the primary transfer sheet 1 fed from the primary transfer sheet feeding device 7 and wound into a roll, and a support rod for supporting the primary transfer sheet 1 on a stationary platen. A primary insert sheet can also be applied to the primary transfer sheet feeding device 7 and the primary transfer sheet winding device 8. The secondary transfer sheet feeding device 28 and the secondary transfer sheet take-up device 29 are the same as those of the secondary molding cavity mold 6.
The long secondary transfer sheet 27 is continuously supplied to the secondary molding cavity 18. The transfer sheet feeding device 28 includes a secondary transfer sheet 27 wound in a roll shape, a support rod that supports the secondary transfer sheet 27 on a fixed platen, and a secondary transfer sheet 2.
It consists of a nip roll that sends out 7 and a sensor for accurate alignment with the cavity. The secondary transfer sheet winding device 29 is the secondary transfer sheet feeding device 2
The secondary transfer sheet 27, which is sent from No. 8 and is wound into a roll, and a supporting rod that supports the secondary transfer sheet 27 on a stationary platen. A secondary insert sheet can also be applied to the secondary transfer sheet feeding device 28 and the secondary transfer sheet winding device 29.

Hereinafter, the primary transfer sheet 1 (or
Primary insert sheet. same as below. ) And the secondary transfer sheet 27 (or the secondary insert sheet; the same applies hereinafter).
Each step of a specific example of the method for manufacturing a two-color molding simultaneous two-step decorative article of the present invention using the two-color molding simultaneous two-step decorative device will be described. First, the primary transfer sheet 1 is placed in the primary molding cavity die 5. Specifically, the primary transfer sheet feeding device 7 located above the primary molding cavity die 5 feeds a certain length of the primary transfer sheet 1 in front of the primary molding cavity die 5. A primary transfer sheet winding device 8 located below the secondary molding cavity mold 5 winds up the primary transfer sheet 1 of a certain length, and a predetermined pattern of the primary transfer sheet 1 is molded in the cavity mold. It is arranged in front of the cavity 17 for use. If necessary, the primary transfer sheet 1 is heated and vacuum-sucked to close the primary molding cavity 17 of the primary molding cavity mold 5 before closing the mold for the primary molding cavity mold 5 and the core mold 4. It may be adhered to the inner surface (Fig. 1). When the primary transfer sheet 1 is a single sheet, it is artificially and mechanically (robot) arranged one by one in the cavity. The primary transfer sheet 1 is placed in the primary molding cavity 17.
When arranging, the primary transfer sheet 1 may be fixed around the primary molding cavity 17 by a clamp member. When the adhesive layer of the primary transfer sheet 1 is composed of a primary adhesive portion that adheres to the primary molding resin 20 and a secondary adhesive portion that adheres only to the secondary molding resin 23, the primary adhesive portion Is located in the primary molding cavity 17 so that the secondary adhesive portion covers the secondary molding resin injection path 3.
Should be placed.

Next, the primary molding cavity mold 5 and the core mold 4 are closed, and the primary molding resin 20 is injected into the primary molding cavity to mold the primary molding resin portion 21. Specifically, for the mold closing, the fixed platen may be pushed forward by the drive unit 13 of the drive unit 16 and the shaft 14. By closing the mold, the cavity mold 5 for the primary molding and the core mold 4 become 1
The secondary transfer sheet 1 is sandwiched and the secondary molding resin injection path is closed by the slide block 26 of the primary molding cavity mold 5 or core mold 4 (FIG. 2, FIG. 5A, FIG. 6A, FIG. 7).
(A), FIG. 8 (a)). The primary molding resin 20 is injected into the primary molding cavity 17 to mold the primary molding resin portion 21, and the primary molding resin portion 21 and the adhesive layer of the primary transfer sheet 1 are adhered (FIG. 3, 5 (b), 6 (b) and 7
(B), FIG.8 (b)). The primary molding cavity 17 is 1
It is provided in either or both of the next molding cavity mold 5 and the core mold 4. Adhesion means that the primary molding resin 20 in a molten state is cooled and solidified in a state of being in contact with the adhesive layer of the primary transfer sheet 1 to form the primary molding resin portion 21 and
It means that the next molding resin portion 21 and the adhesive layer are adhered and integrated. The adhesive layer of the primary transfer sheet 1 is the primary molding resin portion 2
You may make it adhere | attach one top surface and a side surface. The primary transfer sheet 1 may be adhered only to the top surface of the primary molding resin portion 21 and not to the side surface (FIGS. 5 and 7). The primary transfer sheet 1 may be adhered only to a part of the top surface of the primary molding resin portion 21 (FIG. 6).

The injection of the primary molding resin 20 is performed by the injection mechanism of the injection unit 10 of the primary molding resin injection nozzle 11,
The molding resin is poured into the primary molding resin injection path. The primary molding resin 20 and the secondary molding resin 23 may be molding resins having mutually different colors or may be molding resins having mutually different hardnesses. A specific example of the case where the molding resins having different colors from each other is a combination in which the primary molding resin 20 is black and the secondary molding resin 23 is transparent, or the primary molding resin 20 is white and the secondary molding resin 23 is There are combinations that are blue. Both the primary molding resin 20 and the secondary molding resin 23 may be transparent. A specific example of forming the molding resins having different hardnesses is that the primary molding resin 20 is a thermoplastic resin having a high hardness of JIS A hardness of 100 or more, and the secondary molding resin 23 is a JIS A hardness of 30 to 100. There are combinations that are thermoplastic elastomers. Alternatively, the primary molding resin 20 has a JIS A hardness of 30 to
There is a combination of 100 thermoplastic elastomers and the secondary molding resin 23 is a resin having a high hardness of JIS A hardness of 100 or more. As a resin having a JIS A hardness of 100 or higher, acrylic styrene resin, acrylic styrene butadiene resin, polycarbonate resin, acrylic resin, nylon resin, styrene resin, vinyl chloride resin,
There are polyester resins, polyurethane resins, polypropylene resins, polyethylene resins, polybutylene terephthalate resins, and alloys of these resins (also referred to as a mixture or a composite product). As the thermoplastic elastomer having JIS A hardness of 30 to 100, styrene-butadiene-
Styrene (SBS) block copolymer, hydrogenated SB
There are styrene elastomers such as S block copolymers, polyester elastomers, polyurethane elastomers, and polyamide elastomers. In addition, JIS
As a thermoplastic elastomer having an A hardness of 30 to 100,
The silicone two-component curing resin may be provided by LIM (liquid injection molding) injection molding.

Next, the primary molding cavity mold 5 and the core mold 4 are opened, the base sheet is peeled off, and the primary molding resin part 21 is separated from the primary molding cavity mold 5.
When using the primary insert sheet, the base sheet is not peeled off. The primary insert sheet is cut off at the boundary between the part bonded to the primary molding resin part 21 and the part not bonded. Specifically, the mold opening is performed by the drive unit 1
The fixed platen may be pulled rearward by the drive unit 13 of 6 and the shaft 14 (FIG. 4, FIG. 5 (c), FIG. 6 (c), FIG. 7 (c),
FIG. 8 (c)).

In order to prevent the primary molding resin portion 21 from being separated from the core mold 4 when the mold is opened, the side wall from the top surface to the root is inclined in the protruding portion 19 of the core mold 4. In addition, it is preferable that the base has a constricted shape, that is, a so-called undercut shape (FIG. 14). Or core type 4
In this cavity, the opening of the cavity may have a constricted shape, a so-called undercut shape (see FIG. 1).
4). This is effective because the primary molding resin portion 21 is caught on the top surface of the projecting portion 19 of the core mold 4 and the opening portion of the cavity so that the primary molding resin portion 21 does not easily come off, and the primary molding resin portion 21 hardly separates from the core mold 4. The mold opening and the peeling of the base sheet may be performed at the same time.

Next, the core mold 4 to which the primary molding resin portion 21 to which the primary transfer layer 30 (or the primary insert sheet; the same applies hereinafter) is still in contact is up to the secondary molding cavity mold 6. To move. Alternatively, the core mold 4 in which the primary molding resin portion 21 to which the primary transfer layer 30 is adhered is still in close contact
Up to this, the cavity mold 6 for secondary molding is moved. Specifically, the drive unit 13 and the shaft 14 of the injection unit 10 rotate the turntable 9 that is the movable plate of the core mold 4,
It is recommended to slide the slide board (Figs. 1 and 5).
(D), FIG. 6 (d), FIG. 7 (d), and FIG. 8 (d)). The rotation of the turntable 9 may be stopped at a predetermined position or the slide of the slide plate may be stopped at a predetermined position by mechanical means such as friction or electrically by electromagnetic force.

Next, the secondary transfer sheet 27 (or 2
Next insert sheet. same as below. ) Are placed in the secondary molding cavity mold 6 and the core mold 4, and the secondary molding resin 23 is injected into the secondary molding cavity 18 to form 2
The next molding resin portion 24 is molded. To arrange the secondary transfer sheet 27 in the secondary molding cavity mold 6, the secondary transfer sheet feeding device 28 located on the upper part of the secondary molding cavity mold 6 supplies the secondary transfer sheet 27 of a certain length. Is sent to the front of the secondary molding cavity mold 6 and the secondary transfer sheet winding device 29 located below the secondary molding cavity mold 6 winds the secondary transfer sheet 27 of a certain length.
A predetermined pattern of the secondary transfer sheet 27 is arranged in front of the cavity-type secondary molding cavity 18. If necessary,
Prior to the mold closing of the secondary molding cavity mold 6 and the core mold 4, the secondary transfer sheet 27 is heated and vacuum sucked to adhere to the inner surface of the secondary molding cavity 18 of the secondary molding cavity mold 6. It may be allowed (Fig. 1). When the secondary transfer sheet 27 is a single sheet, it is artificially and mechanically (robot) arranged one by one in the cavity. 2 in the cavity 18 for secondary molding
When arranging the secondary transfer sheet 27, the secondary transfer sheet 2 is clamped around the secondary molding cavity 18 by a clamp member.
7 may be fixed.

The adhesive layer of the secondary transfer sheet 27 may be formed so as to adhere to a part (for example, the top surface) of the secondary molding resin portion and not adhere to other parts (for example, the side surfaces). Good (Figure 10). Specifically, there is a secondary transfer sheet 27 in which an adhesive layer is formed only in a part. Or,
There is a secondary transfer sheet 27 in which the components of the adhesive layer are partially changed to form an adhesive layer having a portion having a strong adhesive force and a portion having a weak adhesive force with respect to the secondary molding resin layer. Secondary transfer sheet 2
The adhesive layer 7 adheres to the secondary molding resin portion, but may not adhere to the primary transfer layer 30 (FIGS. 5 to 8).
Specifically, by adjusting the components of the adhesive layer, an adhesive layer having a strong adhesive force to the secondary molding resin layer but a weak adhesive force to the primary transfer layer 30 of the primary molding resin portion. There is a secondary transfer sheet 27 formed with. Alternatively, the components of the adhesive layer may be partially changed to have a strong adhesive force to the secondary molding resin portion and a weak adhesive force to the primary transfer layer 30 of the primary molding resin portion. There is a secondary transfer sheet 27 having an adhesive layer having Alternatively, the components of the adhesive layer may be partially changed so that a part having a strong adhesive force to the secondary molding resin and the primary molding resin part and a part having a weak adhesive force to the primary transfer layer 30. Transfer sheet 2 having an adhesive layer having
There are seven.

Specifically, the mold closing is performed by the drive unit 16
The fixed platen may be pushed forward by the driving unit 13 and the shaft 14 of FIG. 2 (FIG. 2, FIG. 5 (e), FIG. 6 (e), FIG. 7 (e),
FIG. 8 (e)). When the core die 4 has the slide block 26, the slide block 26 of the core die 4 is used.
The secondary molding cavity 18 is formed by sliding (FIG. 8E). In the case where the secondary molding cavity mold 6 has the slide block 26, the slide block 26 of the secondary molding cavity mold 6
To form the secondary molding cavity 18 (not shown). Secondary molding cavity 1
The secondary molding resin 23 is injected into the secondary molding resin portion 24
And the secondary molding resin portion 24 and the adhesive layer of the secondary transfer sheet 27 are bonded (FIG. 3, FIG. 5 (f), FIG. 6 (f),
FIG. 7 (f) and FIG. 8 (f)). The injection of the secondary molding resin 23 is performed by flowing the molding resin into the secondary molding resin injection nozzle 12 and the secondary molding resin injection path 3 by the injection mechanism of the injection unit 10.

Next, the secondary molding cavity mold 6 and the core mold 4 are opened, the base sheet is peeled off, and the secondary molding resin portion 24 to which the secondary transfer layer 31 is adhered is molded. Simultaneous color molding Two-step painting 25 is taken out. When the secondary insert sheet is used, the base sheet is not peeled off.
The secondary insert sheet will be separated at the boundary between the portion bonded to the secondary molding resin portion 24 and the like and the portion not bonded. Specifically, in the mold opening, the fixed platen 15 may be pulled backward by the drive unit 13 of the drive unit 16 and the shaft 14. As the two-color molding simultaneous two-stage decorative article 25, for example, FIG. 5 (g), FIG. 6 (g), FIG. 7 (g), and FIG.
(G), those shown in FIGS. 9, 10, and 11. The following is an example of the two-color molding simultaneous two-stage decorative article 25 obtained by the manufacturing method of the present invention. (1)
The one in which the primary transfer layer 30 is adhered only to the primary molding resin part 21 or the one in which both the primary molding resin part 21 and the secondary molding resin part 24 are bonded. (2) The secondary transfer layer 31 (or the secondary insert sheet) adhered only to the secondary molding resin portion 21, or the primary molding resin portion 21 (or
Those that are adhered to both the primary transfer layer or primary insert sheet) and the secondary molding resin portion 24. Incidentally, in the present invention, the two-step painted product means the design of the primary transfer layer and the secondary transfer layer 3
The one represented by the combination of the first pattern and the one represented by the combination of the pattern of the primary transfer layer and the secondary insert sheet, or the one of the secondary transfer layer Expressed as a combination of the design of the next insert sheet and the design of the primary insert sheet and 2
The one that is expressed by a pattern that combines the patterns of the following insert sheet.

[0029]

EFFECTS OF THE INVENTION According to the method for producing a two-color simultaneous two-stage decorative article of the present invention, it is possible to efficiently obtain a molded article of a different material excellent in design expression.

The method of producing a two-color molding simultaneous two-stage decorative article of the present invention has, for example, a button made of a thermoplastic elastomer resin in an audio panel made of ABS resin,
In addition, it is possible to obtain a multicolored and beautifully designed resin. Further, since the primary molded resin part and the secondary molded resin part are continuously obtained, the following effects are obtained. 1. Since the secondary molding can be performed before the primary molding resin portion undergoes shrinkage distortion, it can be easily inserted into a mold. 2. Since the secondary molded resin part is molded before the primary molded resin part cools, the adhesion between the primary molded resin part and the secondary molded resin part is good. 3. Painting can be performed on both the primary molding resin part and the secondary molding resin part, and the positioning of the pattern is accurate. 4. The cost is low because the processes are not separated.

In the method of manufacturing a two-color molding simultaneous two-stage decorative article of the present invention, when the core mold is moved,
There is no need to rotate or slide the cavity mold in which a heavy device such as a transfer sheet feeding device or a transfer sheet winding device is installed. Therefore, an expensive driving unit having a large driving force is not required, the structure of the driving unit and the device on the cavity side is not complicated, the cost is low, and the productivity is excellent. Since only the primary molding resin injection nozzle is provided at the primary molding position of the injection unit, and only the secondary molding resin injection nozzle is provided at the secondary molding position of the injection unit. It does not become complicated, it is low cost, and it has excellent productivity.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing one step of a method of manufacturing a two-color molding simultaneous two-stage decorative article of the present invention.

FIG. 2 is a cross-sectional view showing one step of a method for manufacturing a two-color molding simultaneous two-stage decorative article of the present invention.

FIG. 3 is a cross-sectional view showing one step of a method of manufacturing a two-color molding simultaneous two-stage decorative article of the present invention.

FIG. 4 is a cross-sectional view showing one step of a method for manufacturing a two-color molding simultaneous two-stage decorative article of the present invention.

FIG. 5 is a cross-sectional view showing one step of a method for manufacturing a two-color molding simultaneous two-stage decorative article of the present invention.

FIG. 6 is a cross-sectional view showing one step of a method for manufacturing a two-color molding simultaneous two-stage decorative article of the present invention.

FIG. 7 is a cross-sectional view showing one step of a method for manufacturing a two-color molding simultaneous two-stage decorative article of the present invention.

FIG. 8 is a cross-sectional view showing one step of a method for manufacturing a two-color molding simultaneous two-stage decorative article of the present invention.

FIG. 9 is a cross-sectional view showing an example of a two-color molding simultaneous two-stage decorative article obtained by the method for producing a two-color simultaneous molding two-stage decorative article of the present invention.

FIG. 10 is a cross-sectional view showing an example of a two-color molding simultaneous two-step decorative article obtained by the method for producing a two-color simultaneous molding two-step decorative article of the present invention.

FIG. 11 is a cross-sectional view showing an example of a two-color molding simultaneous two-stage decorative article obtained by the method for producing a two-color simultaneous molding two-stage decorative article of the present invention.

FIG. 12 is a cross-sectional view showing an example of a two-color molding simultaneous two-stage decorative article obtained by the method for producing a two-color simultaneous molding two-stage decorative article of the present invention.

FIG. 13 is a cross-sectional view showing an example of a transfer sheet used in the method for producing a two-color molding simultaneous two-stage decorative article of the present invention.

FIG. 14 is a cross-sectional view showing a core mold used in the method for manufacturing a two-color molding simultaneous two-stage decorative article of the present invention.

[Explanation of symbols]

 1 Primary Transfer Sheet 2 Primary Molding Resin Injection Path 3 Secondary Molding Resin Injection Path 4 Core Mold 5 Primary Molding Cavity Mold 6 Secondary Molding Cavity Mold 7 Primary Transfer Sheet Feeding Device 8 Primary Transfer Sheet Winding Device 9 Rotating disk 10 Injection unit 11 Primary molding resin injection nozzle 12 Secondary molding resin injection nozzle 13 Drive section 14 Shaft 15 Fixed board 16 Drive unit 17 Primary molding cavity 18 Secondary molding cavity 19 Projection section 20 Primary Molding resin 21 Primary molding resin part 23 Secondary molding resin 24 Secondary molding resin part 25 Two-color molding simultaneous two-stage painting product 26 Slide block 27 Secondary transfer sheet 28 Secondary transfer sheet delivery device 29 Secondary transfer sheet winding Taking device 30 Primary transfer layer 31 Secondary transfer layer

Claims (3)

[Claims] 1. A cavity mold for primary molding in which a core mold having a primary molding resin injection path and a secondary molding resin injection path, and a primary transfer sheet in which a primary transfer layer is laminated on a base sheet are arranged. First, a primary transfer is performed using a two-color molding simultaneous two-stage painting apparatus including a secondary molding cavity mold in which a secondary transfer sheet having a secondary transfer layer laminated on a base sheet is arranged. The primary molding cavity mold in which the sheet is placed and the core mold are closed, the primary molding resin is injected into the primary molding cavity to mold the primary molding resin portion, and then the primary molding resin is molded. The mold cavity mold and the core mold are opened, the base sheet is peeled off, and the primary molding resin portion to which the primary transfer layer is adhered is separated from the primary molding cavity mold, and then the primary transfer layer. The core mold with the primary molding resin part adhered to
The secondary molding cavity mold in which the secondary transfer sheet is arranged is closed, the secondary molding resin is injected into the secondary molding cavity to mold the secondary molding resin portion, and then the secondary molding resin is molded. The cavity mold and the core mold are opened, the base sheet is peeled off, and the secondary molding resin portion to which the secondary transfer layer is adhered is molded,
A method for producing a two-color molding simultaneous two-stage decorative article, characterized in that a two-color simultaneous molding two-stage decorative article is taken out. 2. The method for producing a two-color simultaneous molding two-stage decorative article according to claim 1, wherein resins having mutually different colors are used as the primary molding resin and the secondary molding resin. 3. The method for producing a two-color simultaneous molding two-stage decorative article according to claim 1, wherein resins having mutually different hardness are used as the primary molding resin and the secondary molding resin.