JP2009190224A - Decorating environmentally friendly resin materials - Google Patents

Abstract

[PROBLEMS] To efficiently improve the appearance quality of a molded product using an environmentally friendly resin material.
A method for decorating an environmentally friendly resin material, comprising: forming an environmentally friendly resin material to form a resin base material on which a fine uneven surface is formed; The method includes a step of bringing a resin sheet into contact with the resin sheet, and a step of bonding the resin base material and the resin sheet together by vacuum / pressure forming to form a resin product.
[Selection] Figure 3

Description

  The present invention relates to a method for decorating an environmentally friendly resin material for improving the appearance quality of an environmentally friendly resin material.

  For the purpose of protecting the global environment, it is required to use environmentally friendly resin materials such as recovered resin materials and biomass plastics. Therefore, a method of processing and molding an environmentally conscious resin material has been considered (for example, see Patent Documents 1 and 2).

JP2007-307557 JP2002-285501

  However, since the environmentally friendly resin material is a mixture of various resins, the color tone is not unified, and the appearance quality is low as it is. In addition, when normal molding such as injection molding is performed using an environmentally conscious resin material, the surface of the resin molded product is not smooth and fine irregularities are formed. When unevenness is formed on the surface in this way, it is difficult to perform decoration, so other steps such as polishing the unevenness are required for decoration, and the decoration work is inefficient.

  Accordingly, an object of the present invention is to efficiently improve the appearance quality of a molded product using an environmentally conscious resin material.

  The configuration of the present invention for achieving the above object is a method for decorating an environmentally friendly resin material, which is a step of forming an environmentally friendly resin material to form a resin base material on which a fine uneven surface is formed. And a step of bringing a resin sheet into contact with the surface of the resin base material, and a step of bonding the resin base material and the resin sheet by vacuum / pressure forming to form a resin product.

  The environmentally friendly material may be a recovered resin material or a biomass plastic.

  According to the decorating method of the environmentally friendly resin material as described above, the resin sheet covers the resin base material. For this reason, even if the color tone of the surface of the environmentally friendly resin material is not uniform, the surface of the environmentally friendly resin material can be hidden. Further, if the resin sheet is decorated such as printing, it can be further decorated such as printing.

  Further, the fine uneven surface on the surface of the environmentally friendly resin material plays a role of preventing air accumulation as described above during vacuum / pressure forming. For this reason, even if it does not pass through other processes, such as a grinding process, a resin sheet can be stuck to a resin base material, and appearance quality can be improved efficiently.

  Furthermore, since the uneven surface on the surface of the environmentally friendly resin material is fine, the thickness of the resin sheet absorbs the fine uneven surface, and the unevenness does not appear in the appearance. For this reason, if the smooth resin sheet covers the surface of the resin substrate, the appearance of the environment-friendly resin material can be smoothed, and the appearance quality of the environment-friendly resin material can be improved.

  Thus, the appearance quality of the resin molded product using the environmentally conscious resin material can be improved efficiently.

  Embodiments of the present invention will be described with reference to the drawings.

(Configuration of resin product 10)
The structure of the resin product 10 in this embodiment is demonstrated using FIG.1 and FIG.2. FIG. 1 is a perspective view of a resin product 10 in the present embodiment. FIG. 2 is a cross-sectional view of the resin product 10 in the present embodiment.

  As shown in FIGS. 1 and 2, the resin product 10 is configured by covering a resin base 12 with a resin sheet 11.

  In the present embodiment, the resin sheet 11 has a smooth surface and back surface. An adhesive is applied to the surface 11 a of the resin sheet 11 that faces the resin substrate 12.

  The resin base material 12 is an environmentally friendly resin material. Examples of environmentally friendly resin materials include recovered resin materials and biomass plastics. As the recovered resin material, engineering plastics such as polycarbonate (PC) are preferable in addition to general-purpose plastics such as polyethylene (PE), polystyrene (PS), polypropylene (PP), and acrylonitrile / butadiene / styrene (ABS). As the biomass plastic, polylactic acid, poly (ε · caprolactone · butylene · succinate), polycaprolactone, etc., which are chemically synthesized aliphatic polyesters, are preferable in terms of surface roughness.

  The resin base material 12 is molded by a normal molding method such as injection molding by placing an environmentally friendly resin in a mold (not shown). Environmentally friendly resin materials are not uniform because they are a mixture of various resins. For this reason, when resin is put into a metal mold and the resin base material 12 is molded, a fine uneven surface is formed on the surface thereof.

  As shown to Fig.2 (a), the opposing surface 12a with the resin sheet 11 of the resin base material 12 is a fine uneven surface by the characteristic of an environmental consideration resin material. When the resin base material 12 and the resin sheet 11 are bonded to each other, the air intervening between the resin sheet 11 and the resin base material 12 is removed from the fine uneven surface. Can escape to the outside. As a result, air is prevented from accumulating between the resin sheet 11 and the resin base material 12 during vacuum / pressure forming described later, and the surface of the resin product 10 is free from air accumulation and unevenness of pattern, and has high smoothness. can do.

(Method for producing resin product 10)
The manufacturing method of the resin product 10 is demonstrated using FIG. FIG. 3 is a diagram for explaining a manufacturing procedure of the resin product 10.

  First, as a previous step, the resin base material 12 is molded by an ordinary method such as injection molding using an environmentally conscious resin material as a material by a method not shown. Then, as shown below, the resin base material 12 is decorated.

  A schematic configuration of the vacuum / pressure forming machine 50 of the resin product 10 will be described with reference to FIG. The vacuum / pneumatic molding machine 50 includes an upper molding chamber 51 and a lower molding chamber 52. Each of the upper molding chamber 51 and the lower molding chamber 52 includes a driving device 51a and a driving device 52a.

  A table 54 for fixing the resin base material 12 is disposed at the bottom of the lower molding chamber 52. A clamp 53 that sandwiches the resin sheet 11 is disposed at the upper molding chamber 51 side end of the lower molding chamber 52. A vacuum tank 55 for sucking air and a compressed air tank 56 for sending compressed air are disposed on the side surfaces of the upper molding chamber 51 and the lower molding chamber 52. In addition, a heater 57 is disposed in the upper part inside the upper molding chamber 51.

  Here, the opposing surface 12a of the resin base 12 with the resin sheet 11 is a fine uneven surface as shown in FIG.

  As shown in FIG. 3A, first, the resin base material 12 is set on the table 54 of the lower molding chamber 52 with the upper molding chamber 51 being opened. Further, the resin sheet 11 is clamped by the clamp 53 at the upper end of the lower molding chamber 52.

  As shown in FIG. 3B, the driving device 51 a is activated to lower the upper molding chamber 51 and bring the upper molding chamber 51 into contact with the lower molding chamber 52. Thereby, the space covered with the upper molding chamber 51 and the lower molding chamber 52 is in an airtight state.

  As shown in FIG. 3C, when the table 54 in the lower molding chamber 52 is raised, the upper surface of the resin base material 12 on the table 54 comes into contact with the resin sheet 11. Then, when air is extracted from the upper molding chamber 51 and the lower molding chamber 52 by the vacuum tank 55, the inside of the upper molding chamber 51 and the lower molding chamber 52 is in a vacuum state. Here, the heater 57 is turned on to heat the resin sheet 11. Thereby, the resin sheet 11 is softened and the adhesiveness of the adhesive is also improved.

  As shown in FIG. 3D, when only the upper molding chamber 51 is at atmospheric pressure, air flows as shown by a solid line in the figure. At this time, since the lower molding chamber 52 is vacuum, pressure is applied to the lower molding chamber 52 resin base material 12 from the resin sheet 11 side in the upper molding chamber 51. Further, when compressed air is introduced from the pressurized air tank 56, a larger pressure is applied from the upper molding chamber 51 to the lower molding chamber 52.

  Here, an adhesive is applied to the facing surface 11a of the resin sheet 11 on the resin base material 12 side. When pressure is applied from the upper molding chamber 51 to the lower molding chamber 52 by the adhesive, the resin sheet 11 and the resin base material 12 are integrally bonded to form the resin product 10.

  The facing surface 12a of the resin base 12 with the resin sheet 11 is a fine uneven surface. For this reason, when the resin sheet 11 is bonded to the surface of the resin base material 12, the air between the resin sheet 11 and the resin base material 12 escapes from the fine uneven surface. Then, the surface of the resin sheet 11 on which the adhesive is applied and the facing surface 12a of the resin base 12 are in close contact with each other. Thereby, the surface of the resin product 10 can be made into a thing with high smoothness without an air pocket and a pattern nonuniformity.

  As described above, according to the decorating method of the present embodiment, first, the resin sheet 11 covers the resin base material 12. For this reason, even if the color tone of the surface of the environmentally friendly resin material is not uniform, the surface of the environmentally friendly resin material can be hidden. Further, if the resin sheet 11 is decorated such as printing, it can be further decorated such as printing.

  Further, the fine uneven surface on the surface of the environmentally friendly resin material plays a role of preventing air accumulation as described above during vacuum / pressure forming. For this reason, the resin sheet 11 can be brought into close contact with the resin base material 12 without passing through other processes such as a polishing process, and the appearance quality can be improved efficiently.

  Furthermore, since the uneven surface on the surface of the environmentally friendly resin material is fine, the thickness of the resin sheet 11 absorbs the fine uneven surface, and the unevenness does not appear in the appearance. For this reason, if the smooth resin sheet 11 covers the surface of the resin base material 12, the appearance of the environment-friendly resin material can be smoothed, and the appearance quality of the environment-friendly resin material can be improved.

  In addition, although the resin base material of the present embodiment has no three-dimensional pattern on the surface, it is not limited thereto. FIG. 4 is a perspective view of a resin product 20 which is a modification of the present embodiment. As shown in FIG. 4, if a three-dimensional pattern is given to the resin base material, the resin sheet 21 on the surface is also deformed according to the pattern of the resin base material. In this way, various patterns can be given, and the appearance quality of the environmentally conscious resin material can be improved.

    The present invention relates to a method for decorating an environmentally friendly resin material for improving the appearance quality of an environmentally friendly resin material.

The perspective view of the resin product 10 in this embodiment. Sectional drawing of the resin product 10 in this embodiment. The figure explaining the manufacturing procedure of the resin product 10 in this embodiment. The perspective view of the resin product 20 which is a modification of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Resin product, 11 ... Resin sheet, 11a ... Opposite surface, 12 ... Resin base material, 12a ... Opposite surface, 20 ... Resin product, 21 ... Resin sheet, 50 ... Vacuum pressure molding machine, 51 ... Upper molding chamber, 51a ... Drive device, 52 ... Lower molding chamber, 52a ... Drive device, 53 ... Clamp, 54 ... Table, 55 ... Vacuum tank, 56 ... Pneumatic tank, 57 ... Heater

Claims (3)

A method for decorating environmentally friendly resin materials,
Forming an environmentally friendly resin material to form a resin base material on which fine uneven surfaces are formed; and
Contacting the resin sheet against the surface of the resin substrate;
Bonding the resin base material and the resin sheet by vacuum / pressure forming to form a resin product;
A method for decorating an environmentally friendly resin material, comprising:   The method for decorating an environmentally friendly resin material according to claim 1, wherein the environmentally friendly resin material is a recovered resin material.   The method for decorating an environmentally friendly resin material according to claim 1, wherein the environmentally friendly resin material is biomass plastic.

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