JPH07276426A - Manufacture of design film connecting molded piece - Google Patents

Abstract

PURPOSE:To improve integration of a design film and a molded piece and reduce the number of working processes by making a mold hold a side having the design of the design film, pressing an injected molding material to the design film, and connecting the design film to a predetermined molded piece. CONSTITUTION:On a face of a lower mold 3 to which a design film 4 is in contact, a grained face 5 having a designated surface roughness is formed. When a molded piece l consisting of a synthetic resin and the design film 4 are to be connected, the same material as that of the molded piece 1 is desirable for the material of the design film 4 in order to improve the connectivity with the molded piece 1. The design film 4 is attached to the grained face 5 in the lower mold 3 and a synthetic resin material is injected from an upper mold 2 connected to a nozzle of an injection molding machine so as to obtain the molded piece 1. By this injecting pressure of the synthetic resin material, the design film 4 and the molded piece 1 are pressed and connected in a state fast adhered. At this time, the grained pattern on the grained face 5 is transferred to the whole of the design film 4 and a part of the molded piece 1.

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 design film-bonded molded product, which comprises bonding a design film to a molded product so that the design film and a predetermined molded product are integrated.

[0002]

2. Description of the Related Art As a method of joining a design film joined to a molded product to enhance the feeling of unity with the molded product, generally, the surface roughness of a design film to be joined to the molded product is preliminarily subjected to a texture treatment. There is a method of joining the molded product to a molded product after obtaining the molded product, and a method of bonding the design film to the molded product and then subjecting the molded product to a predetermined surface roughness of the molded product and the design film at the same level by shot blasting.

[0003]

However, in the method of pre-texturing and joining the design film as described above and the method of roughening the surface of the design film and the molded product by shot blasting or the like, the number of working steps increases, The increase in the number of man-hours affects the manufacturing price, resulting in high cost. Further, in the two methods described above, the surface roughness of the surface of the design film becomes uniform, and in particular, when different surface roughness is obtained at any position on the surface of the design film, it is desired to obtain different surface roughness. After performing masking treatment with a masking tape etc. on the place to obtain a predetermined overall surface roughness, the masking tape is peeled off to obtain a partially different surface roughness on the same design film surface. It will be troublesome.

Further, as a measure to reduce the number of working steps, as in the method disclosed in Japanese Patent Laid-Open No. 2-304886,
There is a method of integrally molding a resin product and a design film having a predetermined surface roughness in a resin product manufacturing process.

However, in order to process the surface of the design film to have a predetermined surface roughness, it is necessary to give the surface of the design film a grain, and the effect of reducing the number of working steps is not sufficient.

Therefore, the first object of the present invention is to provide a method for producing a design film-bonded molded product that increases the feeling of unity between the design film and the molded product and reduces the number of working steps. A second object is to provide a method for producing a design film-bonded molded article that can obtain partially different surface roughnesses.

[0007]

A method for manufacturing a design film-bonded molded article according to claim 1 is to hold a design surface side of a design film in a mold in which a surface with which the design film comes into contact has a predetermined surface roughness in advance. And a bonding step of pressing the molding material injected onto the design film held in the mold to bond the design film to a predetermined molded product formed by injection molding.

According to a second aspect of the present invention, there is provided a method for manufacturing a design film-bonded molded article, which comprises a holding step of holding the design surface side of the design film in a mold in which a surface in contact with the design film has a partially different surface roughness in advance. And a bonding step of pressing the injected molding material onto the design film held in the mold to bond the design film to a predetermined molded product formed by injection molding.

[0009]

According to the first aspect of the present invention, the surface of the mold is processed to have a predetermined surface roughness to be applied to the design film.
The design film is attached to the surface of the mold having surface roughness, and the design film is held. Then, the injection molding material is injected into the design film held in the mold, and the injection molding material is pressed against the design film to bond the two. In this case, the surface roughness applied to the mold is transferred to the design film to obtain a design film joined molded product having a predetermined surface roughness.

According to a second aspect of the present invention, a surface having a design film according to the first aspect is provided with a predetermined surface roughness on the surface of the design film and a molded product, and a partially different surface roughness is applied to the mold. By applying, a plurality of different surface roughnesses can be provided on one design film.

[0011]

EXAMPLE FIG. 1 is an explanatory view for explaining a method for manufacturing a design film-bonded molded product according to the first embodiment of the present invention, and FIG. 2 is a method for manufacturing a design film-bonded molded product according to the first embodiment of the present invention. FIG. 3 is a plan view of a design film-bonded molded product using the above.

In FIG. 1, first, the upper mold 2 and the lower mold 3 are the mold A of the molded product 1. This lower die 3 design film 4
An embossed surface 5 that has been embossed with a predetermined surface roughness is formed on the surface that contacts with. As for the surface roughness of the textured surface 5, if the target surface roughness is, for example, 10 [Z], the surface roughness of the textured surface 5 is 10 which is almost the same value.
[Z] is embossed. On the other hand, when the molded product 1 made of synthetic resin and the design film 4 are joined, the design film 4
The material of is preferably the same as that of the molded product 1 in order to improve the bondability with the molded product 1 made of synthetic resin,
In this embodiment, the molded product 1 is 6 nylon (natural) and the design film 4 is 6 nylon (thickness 0.1 [m
m]), and further, the embossed surface 5 of the die A is equivalent to Tanashizawa Hachikosha Buri KN-1507. The molded product 1 made of synthetic resin is a lid having a hollow at the center.

At the time of molding, the design film 4 is attached on the textured surface 5 in the lower mold 3 of the mold A. At this time, the design film 4 is displaced from a specific direction, or the mold A
It is necessary to hold the lower mold 3 so that it does not come off. As a holding method, there is a method of holding the design film in the lower mold 3 of the mold A by adopting a method of adsorbing the design film 4 with static electricity so that the design film 4 is attracted to the lower mold 3 of the mold A. . Incidentally, in the present embodiment, it is simply placed. Next, the synthetic resin material is injected from the upper mold 2 connected to the nozzle of the injection molding machine (not shown) to mold the molded product 1. The design film 4 and the molded product 1 are pressed by the injection pressure of the synthetic resin material from the injection molding machine, and are joined in a close contact state. At this time, the texture pattern on the textured surface 5 is transferred to the entire design film 4 and a part of the molded product 1. Then, the upper mold 2 and the lower mold 3 are released from the molded product 1 to form the molded product 1 to which the design film 4 having a predetermined surface roughness is joined. That is, the design film-bonded molded product 7 shown in FIG. 2 having the textured transfer surface 6 obtained by transferring the textured surface 5 of the mold A to the design film 4 is obtained.

Next, a second embodiment of the present invention will be described.

FIG. 3 is an explanatory view for explaining a method for manufacturing a design film-bonded molded article of the second embodiment of the present invention,
FIG. 4 is a plan view of a design film-bonded molded product using the method for manufacturing a design film-bonded molded product according to the second embodiment of the present invention.

In FIG. 3, the upper mold 2 and the lower mold 8 according to the first embodiment constitute a mold B of the molded product 1. The lower die 8 is composed of a textured surface 9, a textured surface 10 and a textured surface 11 which are given different surface roughnesses by imparting arbitrariness to a given textured surface, and have different surface roughnesses. . Then, the design film 12 and the design film 13, which respectively show different designs, are mounted in the mold B.
However, these design films 12 and 13 are preferably made of the same material in order to enhance the bondability with the molded product 1 as in the first embodiment. Also, design film 1
Since the thicknesses of 2 and 13 depend on the bondability with the molded product 1 and the effect of the embossing to be transferred, the same thickness is desirable in order to obtain the same transfer effect in both the design films 12 and 13. . However, when different transfer effects are desired for the design film 12 and the design film 13, different surface roughness can be obtained by changing the film thickness.

First, when the molded product 1 is molded, the design films 12 and 13 are held so as not to shift. Next, after mounting the molded product 1 connected to an injection molding machine (not shown) on the lower mold 8 of the mold B, the design film 12 and the design film 13 and the molded product are molded by the injection pressure of the synthetic resin of the injection molding machine. 1 is pressed and joined at the same time.
At this time, as in the first embodiment, different texture patterns on the textured surface 9, the textured surface 10 and the textured surface 11 are simultaneously applied to the entire design film 12 and the design film 13 and a part of the molded product 1. Transcribed. Then, by opening the mold B and releasing the molded product 1 from the mold B, the molded product 1 to which the design films 12, 13 having arbitrarily different surface roughness are joined, that is, the textured surfaces 9, 10 , 11 are transferred to obtain the design film-bonded molded product 17 shown in FIG. 4 having the textured transfer surface 14, the textured transfer surface 15 and the textured transfer surface 16.

As described above, in the method of manufacturing the design film-bonded molded product according to FIGS. 1 and 2, in the mold A for bonding the molded product 1 and the design film 4, first, the surface on which the design film 4 contacts is previously A lower mold 3 of the mold A having a textured surface 5 that has been textured with a predetermined surface roughness is manufactured. Then, in the holding step, the design film 4 is held in the lower mold 3 of the mold A. Then, the design film 4 and the molded product 1 are bonded to the mold A for molding the molded product 1 connected to the nozzle of the injection molding machine (not shown) by the injection pressure of the synthetic resin material from the injection molding machine in the bonding step. It At this time, the material of the design film 4 is preferably the same material as the molded article 1 or a material having similar characteristics in order to enhance the bondability with the molded article 1. In this way, when the design film 4 and the molded product 1 are joined, the textured surface 5 is removed from the design film 4
The molded product 1 is cured in a state of being transferred to the surface, the surface roughness is transferred, and a design film-bonded molded product 7 having a predetermined surface roughness can be obtained by a releasing step of taking out from the mold A.
This can be the embodiment of claim 1.

That is, it is possible to obtain a manufacturing method in which a predetermined surface roughness is applied and the design film 4 and the molded product 1 are joined together.

Further, in the method of manufacturing the design film-bonded molded article of the embodiment shown in FIGS. 3 and 4, the predetermined textured surface of the mold A according to the first embodiment is given an arbitrary property and different surface roughness is obtained. A metal mold B having a textured surface 9, a textured surface 10, a textured surface 11 and the like having different surface roughnesses is obtained. Then, the design film 12 and the design film 13 in which different designs are shown are set in the mold B. Further, in the holding step, the design films 12, 1
Hold so that 3 does not shift. Next, when the molded product 1 connected to the nozzle of the injection molding machine (not shown) is molded by the mold B, the respective design films 12 and 13 and the molded product 1 are separated by the injection molding pressure of the synthetic resin from the injection molding machine. It joins by a joining process. Thereby, as in the first embodiment, different texture patterns on the textured surface 9, the textured surface 10 and the textured surface 11 are simultaneously applied to the entire design film 12 and the design film 13 and a part of the molded product 1. Transcribed. Design films 12 and 1 having arbitrarily different surface roughness according to a releasing process of taking out the molded product 1 from the mold B.
It is possible to obtain a molded product 1 in which 3 is bonded, that is, a design film-bonded molded product 17 having a textured transfer surface 14, a textured transfer surface 15, and a textured transfer surface 16 to which the textured surface is transferred. Can be the embodiment of claim 2. That is, it is possible to obtain a manufacturing method in which the different surface roughnesses are partially provided on the same surface and the design films 12 and 13 and the molded product 1 are joined together.

By the way, in each of the above-mentioned embodiments, the molding of synthetic resin has been explained, but in the case of carrying out the present invention, it can also be used for synthetic rubber.

Further, in each of the above-mentioned embodiments, three types of the textured surface 9, the textured surface 10 and the textured surface 11 have been described, but in the case of implementing the present invention, more texture patterns can be added. However, it is also possible to have a continuously changing grain pattern.

In each of the above embodiments, the case where the design films 4, 12, 13 and the molded product 1 are joined without using an adhesive has been described. However, in the case of carrying out the present invention, an adhesive is used. May be used.

[0024]

As described above, in the method for producing a design film-bonded molded product according to claim 1, the surface of the mold for bonding the design film and the molded product to which the design film contacts is
The textured film for obtaining a predetermined surface roughness is formed in advance, the design film is held on the surface, the design film and the molded product are brought into close contact with each other by the injection pressure from the injection molding machine, and they are bonded by curing. At this time, the surface roughness formed on the die is transferred to the hardened design film and the molded product to obtain a design film-bonded molded product having a predetermined surface roughness. In addition, it is possible to obtain a design film-bonded molded product that increases the sense of unity between the design film and the molded product and reduces the number of working steps.

In the method for producing a design film-bonded molded product according to claim 2, the surface of the die for bonding the design film and the molded product to which the design film is in contact has a surface roughness which is arbitrarily and partially different in advance. The textured film is formed in advance, the design film is held on the surface, the design film and the molded product are brought into close contact with each other by the injection pressure from the injection molding machine, and they are bonded by curing. At this time, the surface roughness formed on the mold is transferred to the hardened design film and the molded product to obtain a design film-bonded molded product having a partially different predetermined surface roughness. In addition, it is possible to increase the sense of unity between the design film and the molded product, reduce the number of working steps, and obtain a partially different surface roughness on the surface of the design film.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a method for manufacturing a design film-bonded molded product that is a first embodiment of the present invention.

FIG. 2 is a plan view of a design film-bonded molded product using the method for manufacturing a design film-bonded molded product according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of a method for manufacturing a design film-bonded molded article that is a second embodiment of the present invention.

FIG. 4 is a plan view of a design film-bonded molded product using the method for manufacturing a design film-bonded molded product according to the second embodiment of the present invention.

[Explanation of symbols]

 A, B Mold 1 Molded product 2 Upper mold 3,8 Lower mold 4,12,13 Design film 5,9,10,11 Textured surface 6,14,15,16 Textured transfer surface 7,17 Design film bonding Molding

Claims (2)

[Claims] 1. A holding step of holding a design surface side of a design film with respect to a mold having a surface with which the design film comes into contact with a predetermined surface roughness in advance, and a step of injecting into the design film held in the mold. And a bonding step of bonding the design film to a predetermined molded product formed by injection molding, and manufacturing the design film bonded molded product. 2. A holding step of holding a design surface side of a design film in a mold in which a surface contacting the design film has a partially different surface roughness in advance, and injection into the design film held in the mold. And a bonding step of bonding the designed film to a predetermined molded product formed by injection molding, and manufacturing the design film bonded molded product.