JP2000280269A - Multi-color molding and method for molding it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a multi-color molding wherein the boundary line of molding materials with different colors or different kinds clearly appears. SOLUTION: A multi-color molding 10 is constituted by providing the first and the second molding materials 12 and 13 and an opacifying material 14 for opacifying the bonding region A of the first and the second molding materials 12 and 13 from the surface side. In this case, as the opacifying material 14, a gel coat (a surface resin layer), a polyester film, a printed paper, a nonwoven fabric (a resin-impregnated type is included), etc., can be cited. The first and the second molding materials 12 and 13 are integrated through a curing process after fluid resin materials are cast into a mold and are integrated by inserting SMCs and BMCs into the mold and press-molding them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multicolor molded article and a molding method thereof, and more particularly, to a multicolor molded article capable of clearly displaying a joint surface between plural colors or plural kinds of molding materials. It relates to the molding method.

[0002]

2. Description of the Related Art Conventionally, a multi-colored molded article made of a plurality of colors or a plurality of kinds of resins has been used for a mirror panel with a counter installed in a washroom or an apron portion of a bathtub. The following various types of multicolor molded articles are known depending on the molding method.
That is, when applying the surface resin layer (gel coat) in the hand lay-up method, a plurality of gel coats having different colors are separately applied to predetermined regions by masking,
A first multicolored molded product expressing the difference in color on the surface by these gel coats, or a paper or nonwoven fabric on which a pattern such as a stone pattern is partially printed is set in advance, and a resin colored on the back side is set. A second multi-colored molded body expressing the difference in pattern on the surface by laminating the layers, and a third multi-colored molded body formed by bonding different molded products having different colors and the like in advance by bonding or the like. Or a fourth multicolored molded article formed by simultaneously pouring a molding material of a different color (different type) into a predetermined molding die.

[0003]

However, in the first multi-colored molded article, since the thickness of the gel coat is usually as thin as about 0.2 mm to 1.0 mm, the color is expressed by such a thin layer. As a result, there is a disadvantage that it is difficult to obtain a deep color in appearance. Further, in the second multi-colored molded article, since the paper or the like on which the pattern is printed is planar, there is a disadvantage that a pattern with a deep appearance cannot be obtained even with this molded article. . Further, in the case of the third multi-colored molded article, it is necessary to perform a secondary process of giving different colors to the pre-molded articles and joining them together, so that the multi-colored molded article can be easily formed. It cannot be formed, which leads to an increase in cost, and a seam is formed on the joint surface, and the appearance is not always good. Further, in the fourth multi-colored molded article, although a multi-colored molded article having a large depth can be obtained, the flow pattern is formed by solidification in which mutual interference, that is, boundary areas of molded articles of different colors (different types) are mixed with each other. Is formed, and there is an inconvenience that a multicolor molded article having a color-coded pattern or the like in which a boundary line such as a color becomes clear is not obtained.

[0004]

SUMMARY OF THE INVENTION The present invention has been devised in view of such inconveniences, and has as its object to provide a color pattern formed by dividing a boundary between different or different molding materials so as to be clear. Is to provide a multi-colored molded article having a depth which is integrally expressed and a molding method therefor.

[0005]

In order to achieve the above object, the present invention relates to a multicolor molded article formed by joining a plurality of colors or a plurality of types of molding materials. A concealing material for concealing the region from the surface side is provided,
The configuration is adopted. According to this configuration, since the concealing material can conceal the boundary region between different or different molding materials from the surface side, the color between the molding material and the concealing material is clearly divided. And / or the pattern can be integrally expressed, and since the molding material itself expresses the color or pattern, compared to the case where it is expressed by a thin layer of gel coat, etc. A feeling can be given.

The present invention also relates to a method for forming a multicolored molded article obtained by joining a plurality of colors or a plurality of types of molding materials, wherein a concealing material is provided in a mold inner surface area where a partition plate for partitioning the inside of the mold is arranged. The partition plate is arranged by coating or laying, a molding material of a different color or a different material is injected into each area partitioned by the partition plate, and after the injection is completed, the partition plate is extracted before curing. A technique of forming a color molded body is employed. According to such a method, a multi-colored molded body having a depth and a color and / or pattern integrally formed by clearly dividing the boundary line between the molding material and the concealing material by simple molding. Can be formed.

As the molding method, besides cast molding, press molding can be used. In casting, injection ports are provided at a plurality of locations of a mold, and a predetermined molded product can be obtained by casting and curing a fluid resin material from each injection port and then removing the mold. When using cast molding,
It is also possible to adopt a method in which the concealing material is omitted, and the partition plate is extracted and molded before each molding material is completely cured. In press molding, S
MC and / or BMC can be placed in a mold as a molding material, and the molding materials can be joined to each other by closing the mold and applying pressure under heating. On this occasion,
By setting a concealing material in advance at a portion where the joint surface is exposed, it is possible to conceal the unclearness due to mutual fusion of the joint surface.

As shown in FIG. 1 and FIG. 2, as an example of a multicolored molded body 10 according to the present invention, a first molding material 12 forming a left area in the drawing and a first molding material 12 forming a right area in the figure are formed. A second molding material 13, a concealing material 14 for concealing the joining area A of the first and second molding materials 12 and 13 from the front side, that is, the upper surface side in FIG. 1, and the first and second molding materials It can be constituted by a transparent surface clear layer 15 laminated as necessary on the upper surfaces of the materials 12 and 13 and the concealing material 14.

The first and second molding materials 12 and 13 in the present invention are not particularly limited, but a fluid resin obtained by mixing an unsaturated polyester resin with various additives including a glass frit or the like. Materials, SMC (sheet molding compound), BMC (bulk molding compound), and the like can be suitably used. Examples of the concealing material 14 include a gel coat (surface resin layer), a polyester film, a printing paper, and a nonwoven fabric (including a resin-impregnated type).

[0010]

EXAMPLES Examples of the present invention will be described below together with comparative examples.

[Example 1] As the first molding material 12,
100 parts by weight of an unsaturated polyester resin, 200 parts by weight of a glass frit as an additive, 0.3 part by weight of a cobalt-based accelerator, 1 part by weight of a medium temperature curing type curing agent, 15 parts by weight of white resin particles, and 5 parts by weight of black resin particles While the mixed fluid resin material is used, 100 parts by weight of an unsaturated polyester resin is used as a second molding material, and glass frit 20 is used as an additive.
A fluid resin material obtained by mixing 0 parts by weight, 0.3 parts by weight of a cobalt-based accelerator, 1 part by weight of a medium-temperature curing agent, 10 parts by weight of brown resin particles, and 10 parts by weight of gray resin particles was used. As shown in FIG. 3, the first molding material 12 is injected from the injection port 19 of the molding die 17 while the second molding material 13
Is injected from the injection port 20. Prior to this injection, a surface clear gel coat resin was applied to the bottom surface of the mold 17 in the drawing and cured, and then the colored gel coat 14 was applied and cured in a masked state, and then cured in a curing furnace. The molding materials 12 and 13 were simultaneously injected into the molding die 17, and were injected so that the respective molding materials just hit the area of the colored gel coat layer 17. And at room temperature (20
(C) for 16 hours, and the mold was removed, and secondary curing was performed at 80C for 4 hours. The molded product was obtained as a multicolor molded product having a deep appearance in two colors and having a beautiful appearance in which the boundaries clearly appear.

Example 2 Mold 17 used in Example 1
Inside, the partition plate 22 (see FIG. 4) having a cushioning property is arranged on the colored gel coat 14, and
From Nos. 9 and 20, the same molding materials 12 and 13 as in Example 1 were injected, and the partition plate 22 was extracted at a stage before curing, and cured under the same conditions. The same effect as in Example 1 could be obtained also in the multicolor molded article obtained in Example 2.

Example 3 Molding was performed under the same conditions as in Example 2 except that only the colored gel coat 14 in Example 2 was not provided. The resulting multicolor molded product does not obscure the boundary between the molding materials 12 and 13, but does not show the degree of mutual interference at the boundary to the extent that it affects the product accuracy, and can maintain a practical level. Was.

Example 4 A pair of left and right SMCs was set and press-molded using a molding die 17 shown in FIG. SMC as the first molding material 12 is composed of 100 parts by weight of an unsaturated polyester resin,
0 parts by weight, 150 parts by weight of aluminum hydroxide, 80 parts by weight of glass fiber (1 inch), 1 part by weight of magnesium oxide, 3 parts by weight of zinc stearate, 1 part by weight of a curing agent (peroxyester type), 1 part of white colorant It is based on the blending of parts by weight. The second molding material 13 is obtained by mixing 1 part by weight of a gray colorant in place of the white colorant in the composition of the first molding material. The mold temperature as the molding conditions is 140 ° C./125° C., the final mold closing speed is 1 mm,
The pressing pressure was 90 kg / cm2. The multi-colored molded product thus obtained also has a color-coded pattern in which the boundaries between the first and second molding materials 12 and 13 and the concealing material 14 are clear, and has a deep color appearance. Goods.

Example 5 BMC was used as the second molding material in Example 4. This BMC is composed of 100 parts by weight of an unsaturated polyester resin, 10 parts by weight of a polystyrene-based low-shrinkage agent, 300 parts by weight of aluminum hydroxide, 50 parts by weight of glass fiber (１ ／ inch), and 1 part of magnesium oxide.
Parts by weight, 3 parts by weight of zinc stearate, 1 part by weight of a curing agent (peroxyester), and 0.5 part by weight of a white colorant. Other molding conditions are the same as in the fourth embodiment. The multicolor molded article obtained in this example also exhibited clear coloration, and was able to express the depth well.

[Embodiment 6] As the first molding material 12, B
While MC was used, SMC was used as the second molding material 13. This molding was processed as a multicolor molded body forming a mirror panel with a counter installed in a washroom or the like.
That is, while BMC was applied as a counter portion on which a washbasin and the like were arranged, SMC was applied as other areas such as around a mirror surface, and the concealing material 14 was arranged between these BMC and SMC. The mirror panel with the counter thus obtained had a different appearance between the counter portion and the mirror panel portion, and had a high texture.

Comparative Example 1 After a wax-based release agent was applied to the inner surface of the mold 17, an unsaturated polyester-based surface clear resin was applied and cured. Then, the injection port 19
From 100 parts by weight of resin, colored resin particles (white) 1
While a molding material in which 5 parts by weight and 5 parts by weight of colored resin particles (black) were mixed was injected, 100 parts by weight of resin, 10 parts by weight of brown resin particles, and 10 parts by weight of gray resin particles were mixed through the injection port 20. The molding material was injected. Then, at room temperature (20
(C) for 16 hours, and the mold was released. The mold was left standing for 4 hours while being heated to 80 ° C to perform secondary curing. As a result, in the region where the molding materials of different colors are joined, the molding materials are mixed, the boundaries thereof are disturbed, and the appearance is not good.

[0018]

As is clear from the above Examples and Comparative Examples, according to the present invention, the boundary region between molding materials of different colors or different materials can be concealed from the surface side by the concealing material. By simple molding, it is possible to integrally express a color pattern in which the boundary between the molding material and the concealing material is clearly divided, and to express the color or pattern by the molding material itself. Is provided with a deep and high-quality material feeling, and a high-grade feeling can be provided, as compared with a case where is represented by a gel coat which is a thin layer.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view of a multicolor molded article according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a schematic view of a mold provided with a colored gel coat.

FIG. 4 is a schematic view of a molding die in a state where a partition plate is arranged on the molding die.

FIG. 5 is a schematic diagram of a molding die when SMC or BMC is used as a molding material.

[Explanation of symbols]

10: Multi-color molded body, 12: First molding material, 1
3 ... second molding material, 14 ... concealing material, 17 ...
・ Molding die, A ・ ・ ・ Joint area

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // B29K 105: 06 F term (Reference) 4D075 AB04 AB12 AD16 CB37 DA23 DB31 DB61 DC38 EA05 EB35 4F204 AG03 AH49 FA01 FB20 FB21 FB22 FB23 FB28 FG02 FN02 FN11 FN13 FN17 FQ15 4J038 DD181 FA261 PA01 PB02 PB03 PB05 PC08

Claims (4)

[Claims] 1. A multicolor molded article obtained by joining a plurality of colors or a plurality of types of molding materials, wherein a concealing material for concealing the joining regions from a surface side is provided in a joining region of the molding material. A multicolored molded article characterized in that: 2. A method of forming a multicolored molded article by joining a plurality of colors or a plurality of types of molding materials, wherein a concealing material is applied or laid on an inner surface area of a mold in which a partition plate for partitioning the inside of the mold is arranged. The multi-color is characterized in that a different color or a different type of molding material is injected into each area partitioned by the partition plate, and after the injection is completed, the partition plate is extracted before curing. A method for forming a molded body. 3. A method for forming a multicolored molded article, comprising joining a plurality of colors or a plurality of types of molding materials, wherein a partitioning plate for partitioning the inside of a molding die is disposed, and each partitioning region is divided by the partitioning plate. A method for molding a multicolor molded body, comprising injecting a molding material of a different color or a different type, and extracting the partition plate after the injection is completed and before curing. 4. A method for forming a multicolored molded product by joining a plurality of colors or a plurality of types of molding materials, wherein a concealing material is applied or laid on an inner surface region of a molding die, and the inside of the concealing material region is bonded. And press-molding the SMC and / or BMC in such a manner as to form a multicolor molded article.