JP2009096082A - Method of manufacturing multicolor molded article and multicolor frp molded article manufactured using the manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a multicolor molded article in which even if a pattern is so fine that color break by a spray and color break by masking are difficult, a recess (bottom) and projection (crowning) of this fine pattern (irregularity) are separated by color, thereby the fine pattern is made to have multicolor, and to provide a multicolor molded article manufactured by the manufacturing method. <P>SOLUTION: The method of manufacturing the multicolor molded article comprises: using an FRP mold having a mold pattern by irregularity, wherein the mold pattern has a first pattern formed by a bottom (A) of the irregularity, a second pattern formed by a crowning (B) of the irregularity, and a third pattern formed by a crowning (C) higher than the crowning B; applying gel coat resins of different colors to respective patterns; and thereafter squeezing, to form a fine multicolor pattern. In addition, a multicolor molded article manufactured by the manufacturing method is disclosed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for producing a fiber reinforced plastic (hereinafter referred to as “FRP”) molded product and an FRP molded product produced by using this production method, and more specifically, a method for producing a multicolor molded product. And a multicolor FRP molded product produced by using this production method.

  Conventionally, as a method for producing a multicolor molded product, as a method of color-coding the gel coat, a method of spraying a colored gel coat resin of a plurality of colors onto a lower mold surface with a spray gun having a plurality of injection ports (Patent Document 1), molding Using a pattern pattern or masking tape applied to the surface, apply the gel coat resin with a spray gun etc. to the boundary line to be color-coded, remove the masking while the gel coat resin is uncured, and after the resin hardens, the next gel coat resin There is known a method (Patent Documents 2 to 5) in which colors are classified by a method such as coating.

In addition to the method of color-coding the gel coat, a method of spraying reinforcing fibers colored in advance (Patent Document 6), a method of integrally molding molding materials colored in different colors in advance and manufacturing a multicolor molded product (Patent Document) 7) is known.
JP-A-6-126757 Japanese Patent Laid-Open No. 10-16070 JP-A-9-192595 Japanese Patent Laid-Open No. 11-179812 JP 9-314682 A JP-A-7-241916 JP 2000-280269 A

However, these multicolor molded product manufacturing methods can be used when the pattern is as simple as a geometric pattern and the color-coded area is color-coded in a relatively large area of at least 1 mm ² level or more. Is. For this reason, a molded product having a finer pattern than this, for example, a molded product having a fine patterned pattern (unevenness) such as a woven texture pattern or a decorative pattern such as embroidery applied to the textured pattern. Such fine pattern patterns could not be color-coded from other parts only in texture patterns or only decorative patterns such as embroidery. That is, since the region of the concave portion (bottom portion) and the convex portion (top portion) of the woven fabric texture pattern and the decorative pattern such as embroidery applied to the weave is generally smaller than 1 mm ² , these concave portions (bottom portion) ) And convex (top) regions could not be color-coded by conventional spraying, or by masking using a paper pattern or masking tape. For this reason, a molded product in which such a fine pattern is multicolored cannot be produced.

  The present invention solves the above problem, and even if the pattern is so fine that color classification by spraying or color classification by masking is difficult, the concave part (bottom part) and convex part of this fine pattern pattern (unevenness) An object of the present invention is to provide a method for producing a multicolor molded product in which a fine pattern is multicolored by color-coding the (top), and a multicolor molded product produced by this production method. In particular, the method for producing a multicolor molded product in which the fine pattern is a fine pattern such as a texture pattern of a fabric or a decorative pattern by embroidery applied to the texture, and the method for producing the same. An object of the present invention is to provide a multi-color molded product manufactured by the above method.

The present invention relates to the following.
(1) A pattern having unevenness, wherein the pattern is a first pattern formed by the bottom A of the unevenness, a second pattern formed by the top B of the unevenness, and a top higher than the top B After applying the FRP mold having the third pattern formed by C and applying the first color gel coat resin A so as to cover the bottom A, and squeezing the gel coat resin A to remain on the bottom A The gel coat resin A is cured, and the gel coat resin B of the second color is applied so as to cover the top portion B, and the gel coat resin B is squeezed so that the gel coat resin B remains on the top portion B. A step B for curing B and a gel coat resin C of the third color is applied so as to cover the top portion C, and the squeegee so that the gel coat resin C remains on the top portion C. And a step C for curing the gel coat resin C.
(2) In step (1), in step A, after gel coat resin A is applied and squeezed, gel coat resin A remaining on top B and top C is wiped off with a cloth containing a solvent. A method for producing a multicolor molded article, in which after the resin B is applied and squeezed, the gel coat resin B remaining on the top C is wiped off with a cloth containing a solvent.
(3) The method for producing a multicolor molded product according to (1) or (2), wherein the pattern formed by the unevenness is a pattern patterned by transferring a texture pattern of a woven fabric.
(4) The multicolor molded product according to any one of (1) to (3), wherein squeezing is performed using a polyethylene foam, a rubber foam, a polypropylene foam, a urethane foam, a rubber spatula, and a fabric as a squeegee. Manufacturing method.
(5) A multicolor molded product produced by the production method of any one of (1) to (4).

  According to the present invention, even if the pattern is so fine that it is difficult to perform color classification by spraying or masking, the concave part (bottom part) and the convex part (top part) of the fine pattern pattern (unevenness) are color-coded. Thus, it is possible to provide a method for producing a multicolor molded product in which a fine pattern is multicolored and a multicolor molded product produced by this production method. In particular, the method for producing a multicolor molded product in which the fine pattern is a fine pattern such as a texture pattern of a fabric or a decorative pattern by embroidery applied to the texture, and the method for producing the same. It is possible to provide a multi-color molded product manufactured by the above.

  As shown in FIGS. 1, 2, 4, and 5, the pattern 2 by the unevenness of the present invention is a pattern expressed by the unevenness formed on the surface of the FRP mold 1 mainly for the purpose of decoration. A pattern that has been inverted. As shown in FIG. 1 and FIG. 2, the pattern 2 by the unevenness is the unevenness (simple unevenness) consisting of the bottom A3 and the top B5 having substantially the same height, or the bottom A3 as shown in FIGS. The unevenness | corrugation (multiple unevenness | corrugation) which has several top part B5 and C7 which has the height of several steps is contained. As an example of the simple unevenness, a texture pattern of a woven fabric can be cited. As a pattern 2 obtained by inverting this, as shown in FIG. 1 and FIG. A portion where the texture (opening) is transferred corresponds to the top B5. In addition, as an example of the multiple unevenness, there is an embroidered decorative pattern applied to a woven fabric texture pattern. As a mold pattern 2 obtained by inverting the embroidered decorative pattern, as shown in FIGS. 4 and 5, an embroidered decorative pattern is used. The transferred portion corresponds to the bottom A3, the portion where the fabric fibers are transferred corresponds to the top B5 of the first stage, and the portion where the texture (opening) of the fabric is transferred corresponds to the top C7 of the second stage.

  The FRP mold 1 having the pattern 2 due to unevenness according to the present invention is used to form a molded product 13 having the pattern 2 due to unevenness on the surface, and can be produced, for example, as follows. it can. First, after placing a model fabric on a model mold and impregnating the fabric with a liquid resin mixed with a curing agent, the texture of the fabric and the decorative pattern by embroidery emerge. The amount of the liquid resin remaining in the resin is adjusted, and the fabric impregnated with the resin is cured to produce a model mold. Thereafter, the model mold is inverted to produce the FRP mold 1. Secondly, first, a glass fiber mat is placed on the FRP mold 1, and the glass fiber mat is impregnated with a liquid resin, and a fabric is placed thereon, and the fabric is impregnated with a liquid resin. By peeling off the woven fabric in a state where the liquid resin is semi-cured, the FRP mold 1 to which the texture pattern of the woven fabric or the decorative pattern by embroidery is transferred is produced.

  As shown in FIG. 2 and FIG. 5, the mold pattern 2 with the unevenness according to the present invention has an uneven recess (bottom) when viewed from the surface side of the molded product 13 (the lower side of the FRP mold in FIGS. 1 and 4). A pattern corresponding to A3) and a pattern corresponding to the convex portion (top B5) are included. For example, in the case of simple unevenness, as shown in FIG. 1 and FIG. 2, it has a first pattern 4 formed by an uneven bottom A3 and a second pattern 6 formed by an uneven top B5. In the case of multiple unevenness, as shown in FIGS. 4 and 5, the first pattern 4 formed by the uneven bottom A3, the second pattern 6 formed by the uneven top B5, and higher than the top B5. And a third pattern 8 formed by the top portion C7.

  The concave and convex concave portions (bottom portion A3) and convex portions (top portions B5 and C7) of the pattern 2 of the present invention can be color-coded as follows. For example, in the case of simple unevenness, as shown in FIG. 1, first, the first color gel coat resin A9 is applied so as to cover the bottom A3, and the gel coat resin A9 remains on the bottom A3 and does not remain on the top B. After squeezing, a step A for curing the gel coat resin A9 is performed. Next, a second color gel coat resin B10 is applied so as to cover the top portion B5, and after squeezing so that the gel coat resin B10 remains on the top portion B5, the step B of curing the gel coat resin B10 is performed. Thereby, as shown in FIG. 3, a molded product 13 in which the concave and convex portions (bottom portion A <b> 3) and the convex portions (top portion B <b> 5) of the unevenness of the mold pattern 2 can be manufactured.

  Further, for example, in the case of multiple irregularities, as shown in FIG. 4, first, the first color gel coat resin A9 is applied so as to cover the bottom A3, and the gel coat resin A9 remains on the bottom A3 and the top B5 and the top C7. After squeezing so as not to remain, Step A for curing the gel coat resin A9 is performed. Next, after applying the gel coat resin B10 of the second color so as to cover the top B5 and the top C7, and squeezing so that the gel coat resin B10 remains on the top B5 and does not remain on the top C, the gel coat resin B5 Step B for curing is performed. Further, a third color gel coat resin C11 is applied so as to cover the top portion C7, and after squeezing so that the gel coat resin C11 remains on the top portion C7, the step C of curing the gel coat resin C11 is performed. Thereby, as shown in FIG. 6, it is possible to produce a molded product 13 in which the concave and convex concave portions (bottom portion A3) of the pattern 2 and the convex portions (the top portion B5 and the top portion C7) at a plurality of levels are color-coded. it can.

  Furthermore, even if the degree of multiplexing increases, a gel coat resin of a predetermined color is applied so as to cover the convex portions (top portions) for each of the convex portions (top portions) at a plurality of levels, and the convex portions ( After squeezing the gel coat resin so that the gel coat resin remains on the top part and does not remain on other parts, the concave part (bottom part) of the mold pattern 2 and a plurality of steps are repeated by repeating the curing of the gel coat resin. Each convex part (top part) of the height of can be color-coded.

The viscosity of the gel coat resin used is preferably 0.3 to 2.0 Pa · s (25 ° C.). When used for a mold having a fine pattern less than 1 mm ^{2 in the} color-coded region, 0.2 mm to 0.05 mm when the viscosity of the gel coat resin used as the first color gel coat resin is less than 1.0 Pa · s. This is preferable because the gel coat resin enters even fine irregularities. A gel coat resin having a relatively high viscosity of 1.0 to 2.0 Pa · s is suitable as the gel coat resin B10 for the second and subsequent colors having a relatively large pattern of 1 mm ² or more. When a gel coat resin having a relatively high viscosity of 1.0 to 2.0 Pa · s is used as the gel coat resin A9 for the first color, it can be used for a mold having unevenness of about 0.3 to 1 mm, but 0.2 mm The mold having the following irregularities is not preferable because fine bubbles may remain in the recess (bottom A3) of the mold.

  Examples of the squeegee used in the method for producing a multicolor molded article of the present invention include polyethylene foam, rubber foam, polypropylene foam, urethane foam, rubber spatula, and fabric. As a result, during squeezing, the squeegee can be appropriately deformed depending on the hardness of the squeegee, the amount of force applied, etc., and the position where the tip of the squeegee reaches can be adjusted.

  Among them, polyethylene foam has a wide range of expansion ratios from 10 times to 40 times, and the hardness varies depending on the expansion ratio. Therefore, when this is used as a squeegee, the degree to which the tip of the squeegee follows irregularities depending on the expansion ratio. Is preferable because the amount of gel coat resin removed can be adjusted. In addition, a polypropylene foam is also preferable because the expansion ratio and strength are relatively similar to a polyethylene foam. Urethane foams are suitable for leaving the applied gel coat resin thick because they have a higher expansion ratio and weaker strength than the two types of materials. The thickness and width of these foams vary depending on the range of the coated gel coat resin and the pattern, but generally the thickness is about 5 mm to 10 mm and the width is about 50 to 100 mm.

  Further, a relatively hard material such as a rubber spatula is suitable for the FRP mold 1 in which the pattern 2 is a simple unevenness as shown in FIGS. 1 and 2, for example, multiple unevenness as shown in FIGS. In the FRP mold 1, a large amount of gel coat resin remains on the bottom part A3 and the top part B5, and the pattern 2 tends not to appear clearly. The thickness and width of the rubber spatula vary depending on the range of the coated gel coat resin and the pattern, but generally the thickness is about 2 mm to 5 mm and the width is about 50 to 75 mm.

  Moreover, when squeezing the gel coat resin of a decoration part with a cloth, a cotton cloth is easy to absorb a gel coat resin and is effective. Chemical fibers such as polyester fibers and nylon fibers have less resin absorption than cotton fiber fabrics, and the range of gel coat resin scrapes tends to be narrow. The thickness and width of these fabrics vary depending on the range of the coated gel coat resin and the decorative pattern, but it is easy to use the fabric by folding it to a thickness of about 3 mm to 5 mm and a width of about 50 to 75 mm.

  The squeezing in the manufacturing method of the multicolor molded product 13 of the present invention can be performed as follows. For example, in the case of simple unevenness, as shown in FIG. 1, when the gel coat resin A9 of the first color is applied so as to cover the bottom A3 and this gel coat resin A9 is squeezed, the amount of deformation of the squeegee depending on the force applied. Therefore, the tip of the squeegee does not reach the bottom A, and can follow the top B5. This can be determined by visually confirming that the gel coat resin A9 remains on the bottom A3 and does not remain on the top B5. As a result, the gel coat resin A9 remains on the bottom A3 and does not remain on the top B5. Thereafter, the gel coat resin A9 is cured and the process A is completed. Next, the gel coat resin B10 of the second color is applied so as to cover the top B5 and the gel coat resin A9, and this gel coat resin B10 is squeezed. In this case, the squeegee is deformed depending on the force applied. The presser and the tip of the squeegee do not reach the top B5. This can be determined by visually confirming that the gel coat resin B10 remains on the top B5. As a result, the gel coat resin B10 remains in the top portion B5. Thereafter, the gel coat resin B10 is cured and the process B is completed.

  Next, for example, in the case of multiple unevenness, as shown in FIG. 4, when the gel coat resin A9 of the first color is applied so as to cover the bottom A3 and this gel coat resin A9 is squeezed, a squeegee is applied depending on the force applied. Since the deformation amount of the squeegee can be adjusted, the tip of the squeegee does not reach the bottom A3, and can reach the top B5 and the top C7 following the top. This can be determined by visually confirming that the gel coat resin A9 remains on the bottom A3 and does not remain on the top B5 and the top C7. As a result, the gel coat resin A9 remains on the bottom A3 and does not remain on the top B5 and the top C7. Thereafter, the gel coat resin A9 is cured and the process A is completed. Next, when the gel coat resin B10 of the second color is applied so as to cover the top B5 and this gel coat resin B10 is squeezed, the squeegee can be appropriately deformed depending on the force applied. It is possible to achieve a state in which the leading edge does not reach the top B5 and reaches the top C7. This can be determined by visually confirming that the gel coat resin B10 remains on the top B5 and does not remain on the top C7. As a result, the gel coat resin B10 remains in the top B5 and not in the top C7. Thereafter, the gel coat resin B10 is cured and the process B is completed. Next, the gel coat resin C11 of the third color is applied so as to cover the top portion C7, and this gel coat resin C11 is squeezed, but in this case, the deformation of the squeegee is suppressed by the force applied, The tip does not reach the top C7. This can be determined by visually confirming that the gel coat resin C11 remains on the top C7. As a result, the gel coat resin C11 remains in the top portion C7. Thereafter, the gel coat resin C11 is cured and the process C is completed.

  In the above example, each of the first pattern 4, the second pattern 6, and the third pattern 8 corresponding to the bottom portion A3, the top portion B5, and the top portion C7 is provided for each of the simple unevenness and the multiple unevenness. The gel coat resin (color) is different, but the gel coat resin (color) is not necessarily different for each pattern, and the same color gel coat may be used for a part or all of the patterns. For example, in the multiple unevenness, as described above, the place where the decorative pattern by embroidery is transferred is the bottom A3, the place where the fabric fiber is transferred is the top B5, and the place where the fabric texture (opening) is transferred Corresponds to the top C7. At this time, the gel coat resin A9 is used for the first pattern 4 corresponding to the bottom portion A3 to which the decorative pattern by embroidery is transferred, the second pattern 6 corresponding to the top portion B5 to which the fabric fibers are transferred, and the weave (opening) of the fabric. The same gel coat resin B10 can also be used for the third pattern 8 corresponding to the top portion C7 to which is transferred). In this case, the second pattern 6 and the third pattern 8 corresponding to the fibers of the fabric and the opening thereof have the color of the gel coat resin B10, and only the first pattern 4 corresponding to the decorative pattern by embroidery is the color of the gel coat resin A9. Therefore, only the decorative pattern with fine embroidery can be colored with different colors.

  Further, after the gel coat resin A9 is used for the first pattern 4 corresponding to the bottom A3 to which the decorative pattern by embroidery is transferred, the second pattern 6 corresponding to the top B5 to which the fabric fibers are transferred, and the weave of the fabric ( Similarly, by performing squeezing so that the gel coat resin B10 remains on both of the third patterns 8 corresponding to the top portion C7 to which the opening is transferred, the decorative pattern by the fine embroidery (the first pattern corresponding to the bottom portion A3) is also obtained. Only the pattern 4) can be colored with different colors. Thereby, it is not necessary to squeeze every pattern of the second pattern 6 and the third pattern 8 corresponding to the top part B5 and the top part C7, and the man-hour can be reduced.

Furthermore, when the shape of the area where the decorative pattern by the embroidery is transferred is relatively simple and has a size of several cm ² or more and is gathered in one place to several places, the top B5 and the top C7 A region having only the corresponding second pattern 6 and third pattern 8 (for example, a region around FIG. 5) is masked. The gel coat resin is applied only to a region having only the first pattern 4 corresponding to the bottom portion A3 to which the decorative pattern by embroidery has been transferred and the second pattern 6 corresponding to the top portion B5 (for example, a square region in the center of FIG. 5). A9 is applied and squeezed. Even if this method is used, similarly to the method described above, only the decorative pattern (first pattern 4 corresponding to the bottom A3) by fine embroidery can be colored with different colors. Thereby, although the man-hours for masking increase, even if the gel coat resin A9 is applied to the first pattern 4 corresponding to the bottom A3, the second pattern 6 and the third pattern 8 corresponding to the top B5 and the top C7 are Since the gel coat resin A9 is not applied, it is not necessary to remove the gel coat resin in these portions by squeezing.

  In both cases of simple unevenness and multiple unevenness, after squeezing each gel coat resin, the gel coat resins B10 and C11 that remain slightly on the top portions B5 and C7 are cured before the gel coat resins B10 and C11 are cured. In addition, it is desirable to remove them. For example, in the case of the simple unevenness shown in FIG. 1, after the gel coat resin A9 is applied and squeezed so as to cover the bottom A3, the gel coat resin A9 remaining on the top B5 is wiped with a cloth soaked with a solvent. Further, in the case of multiple irregularities shown in FIG. 4, after applying and squeezing the gel coat resin A9 so as to cover the bottom A3, the gel coat resin A9 remaining on the top B5 and the top C7 is wiped off with a cloth containing a solvent, Next, after applying and squeezing the gel coat resin B10 so as to cover the top part B5, the gel coat resin B10 remaining on the top part C7 is wiped off with a cloth containing a solvent. Thereby, the color classification of the recessed part (bottom part A3) and each convex part (top part B5, C7) of the pattern 2 by the unevenness | corrugation shown in FIG. 3, FIG. 6 can be made clear. That is, in the case of simple unevenness, as shown in FIG. 3, when viewed from the surface side of the molded product 13 that has been molded and removed from the FRP mold 1, the second pattern 6 formed by the top B5 has a bottom portion. The gel coat resin A9 of the same color as A3 does not remain, and the color classification with the first pattern 4 formed by the bottom A3 becomes clear. Further, in the case of multiple irregularities, as shown in FIG. 6, since the gel coat resin B10 of the same color as the top B5 does not remain in the third pattern 8 formed by the top C7, the first pattern formed by the bottom A3. The color classification between the first pattern 4 and the second pattern 6 formed by the top B5 becomes clear.

  As a specific method for removing the gel coat resins A9 and B10 remaining on the top portions B5 and C6, a method of wiping the squeezed mold surface by adding acetone to the cotton fabric can be used. As a result, the gel coat resin A9 remaining on the bottom A3 is not removed, and only the gel coat resins A9 and B10 slightly remaining on the tops B5 and C7 are removed, and the hue of the gel coat resins B10 and C11 applied thereon is clearer. become. The amount of acetone contained in the cotton fabric is preferably such that the acetone once contained in the cotton fabric is strongly squeezed out. When the amount of acetone contained in the cotton fabric is large, the gel coat resin A9 left on the bottom A3 is washed away, and the pattern (first pattern 4) formed by the bottom A3 tends to become unclear. Further, if the amount of acetone contained in the cotton fabric is small, the gel coat resins A9 and B10 slightly remaining on the top portions B5 and C7 are not sufficiently removed, and the pattern formed by the top portions B5 and C7 (second pattern 6). The third pattern 8) tends not to be clear.

  After squeezing the first color gel coat resin A9 and before applying the second color gel coat resin B10, the curing condition of the first color gel coat resin A9 can be applied to the second color gel coat resin B10. As long as the surface of the gel coat resin A9 for the first color is dried, it is sufficient that the surface is dry. For example, it may be allowed to stand at room temperature for 1 hour or longer, or may be cured in a curing furnace at 60 ° C. for about 20 minutes. The curing conditions for the gel coat resin B10 for the second color performed before applying the gel coat resin C11 for the third color, and the curing conditions for the gel coat C11 and resin applied thereafter are the same.

  The final curing of the gel coat resins A9, B10, and C11 is performed together with the curing of the FRP reinforcing layer 12 described later. That is, the curing process of the FRP reinforcing layer 12 is performed in combination with the curing process of the gel coat resins A9, B10, and C11. Thereby, an operation man-hour and hardening time can be reduced significantly. In addition, as hardening conditions of gel coat resin A9, B10, C11 at the time of this final hardening, Preferably it is the temperature of 50-60 degreeC, Preferably it maintains for 60-120 minutes. If this temperature is less than 40 ° C., the gel coat resins A9, B10, C11 are not sufficiently cured, and the surface of the multicolor molded product 13 formed by the gel coat resins A9, B10, C11 is not sufficiently hard. When the curing temperature exceeds 60 ° C., the product surface and the mold surface of the multicolor molded product 13 are peeled off, and a mold separation pattern appears on the surface of the product surface, which tends to require finishing. . After the mold temperature returns to room temperature, the cured multicolor molded product 13 is removed from the FRP mold 12 and cut into predetermined dimensions to obtain a desired product.

  As a configuration of the FRP reinforcing layer 12 shown in FIGS. 1 and 4, for example, a surface mat (not shown) made of glass fibers and a chopped strand mat (not shown) are formed on the coated / cured gel coat resin B10 or C11. ) Is laminated while applying and impregnating a liquid unsaturated polyester resin (not shown) to make the thickness 3 to 5 mm.

  As a method for laminating the FRP reinforcing layer 12 shown in FIGS. 1 and 4, for example, an unsaturated polyester resin (not shown) in which a curing agent is blended on the coated / cured gel coat resin B10 or C11 is used with a cotton roller. Then, a surface mat (not shown) is placed thereon, and an unsaturated polyester resin (not shown) is further applied thereon with a cotton roller to impregnate the surface mat (not shown). At this time, bubbles are removed by a defoaming roller so that bubbles do not remain on the surface mat (not shown). Next, a chopped strand mat (not shown) is placed on one layer, and an unsaturated polyester resin (not shown) is applied thereon with a cotton roller, and then bubbles are removed with a defoaming roller. In this method, the chopped strand mat (not shown) is repeatedly laminated from about 2 layers to about 5 layers.

The application amount of the liquid unsaturated polyester resin is preferably 700 to 900 g with respect to 1 m ² of the application area per layer of the chopped strand mat. If the coating amount is less than 450 g / m ² · layer, the resin tends to be insufficient and the glass fiber tends to whiten. If it exceeds 900 g / m ² · layer, the resin is excessive and the laminating operation tends to be difficult.

  The curing condition of the FRP reinforcing layer 12 is to naturally cure at room temperature for 6 hours or more, and thereafter, preferably maintained at a temperature of 50 to 60 ° C., preferably 60 to 120 minutes, to accelerate the curing of the unsaturated polyester resin. When this temperature is less than 40 ° C., the unsaturated polyester resin is not sufficiently cured, and there is a tendency that sufficient strength cannot be obtained. Further, as described above, since the gel coat resins A9, B10, C11 performed simultaneously with the curing of the FRP reinforcing layer 12 are insufficient, sufficient surface hardness cannot be obtained, and the surface of the multicolor molded product 13 is damaged. It tends to be easy. When the curing temperature exceeds 60 ° C., the product surface and the mold surface of the multicolor molded product 13 are peeled off, and a mold separation pattern appears on the surface of the product surface, which tends to require finishing. After the mold temperature returns to room temperature, the cured multicolor molded product 13 is removed from the FRP mold 1 and cut into predetermined dimensions to obtain a desired product.

Example 1
Embodiment 1 of the present invention will be described below. As shown in FIGS. 4 and 5, the uneven pattern 2 according to the present embodiment is a multiple uneven pattern 2 obtained by inverting the surface shape obtained by embroidering a woven fabric texture pattern. In this pattern, as shown in FIGS. 4 and 5, the portion where the embroidered decorative pattern is transferred is on the bottom A3, the portion where the fabric fibers are transferred is on the top B5 of the first stage, and the fabric weave ( A portion where the opening) is transferred corresponds to the top portion C7.

  The FRP mold 1 having the pattern 2 due to the unevenness is produced as follows. First, after placing a model fabric on a model mold and impregnating the fabric with a liquid resin mixed with a curing agent, the liquid resin remaining in the texture so that the texture pattern of the fabric and the decorative pattern by embroidery emerge. The amount of the resin is adjusted and the fabric impregnated with the resin is cured to produce a model mold, and then the FRP mold 1 is produced by inverting the model mold.

  As shown in FIG. 5, the mold pattern 2 with the unevenness of this embodiment is formed by the bottom A3 of the unevenness when viewed from the surface side of the molded product 13 (the lower side of the FRP mold 1 in FIG. 4). 1 pattern 4, the 2nd pattern 6 formed of the uneven | corrugated top B5, and the 3rd pattern 8 formed by the top C7 higher than the top B5.

  The concave and convex concave portions (bottom portion A3) of the pattern 2 and the respective convex portions (top portions B5 and C7) are color-coded as follows.

(Process A)
Masking is carried out except for the FRP mold 1 decorative pattern portion (the area where the mold pattern 2 is present) subjected to the release treatment, and as shown in FIG. 4, first, the first color gel coat resin A9 (DH) is covered so as to cover the bottom A3. Sandooma 663KB manufactured by Material Co., Ltd. is applied with a brush so that no bubbles remain in the fine part of the decorative part. Using a polyethylene foam squeegee, squeezing is performed so that the gel coat resin A9 remains on the bottom A3 and does not remain on the top B5 and the top C7. The gel coat resin A9 remaining on the top part B5 or the top part C7 is wiped off using a cotton cloth that is strongly squeezed with acetone. Thereafter, the gel coat resin A9 is cured in a curing oven at 60 ° C. for about 20 minutes.

(Process B)
After confirming that the first color gel coat resin A9 has been cured and the mold temperature has returned to room temperature, the second color gel coat resin B10 (SANDOMA 2620PW manufactured by DH Material Co., Ltd.) is decorated in the same way as the first color so as to cover the top B5. Apply to the area with a brush. Using a polyethylene foam squeegee, squeezing is performed so that the gel coat resin B10 remains on the top B5 and does not remain on the top C7. The gel coat resin B10 remaining on the top C7 is wiped off using a cotton cloth that is strongly squeezed with acetone. Thereafter, the gel coat resin B10 is cured for about 20 minutes in a curing oven at 60 ° C.

(Process C)
After confirming that the second color gel coat resin B10 was cured and the mold temperature returned to room temperature, the third color gel coat resin C11 (PCG-7G-269 manufactured by Tokyo Ink Co., Ltd.) was used as the first color so as to cover the top C7. Similarly, apply to the decorative part by brush. Using a polyethylene foam squeegee, squeezing is performed so that the gel coat resin C11 remains on the top C7. Thereafter, the gel coat resin C11 is cured in a curing furnace at 60 ° C. for about 20 minutes.

  Thus, after applying multicolor gel coat A9, B10, C11 to a decoration part, masking is removed and the gel coat resin D (not shown) with respect to the whole FRP type 1 surface also including a decoration part (Tokyo Ink Co., Ltd.) PCG (VA) 308-GR-F25) is applied with a spray gun to a thickness of about 0.2 mm to 0.5 mm, and cured in a 60 ° C. curing oven for about 20 minutes. Thereby, as shown in FIG. 6, the concave / convex concave portion (bottom portion A3) of the pattern and the convex portions (the top portion B5 and the top portion C7) having a plurality of heights can be color-coded into three colors.

  The structure of the FRP reinforcing layer 12 shown in FIG. 4 is a surface mat made of glass fiber (SMB-3600C manufactured by Asahi Fiber Glass Co., Ltd.) on the coated and cured gel coat resins A9, B10, C11, D (not shown). ) And a chopped strand mat (FEM-450 manufactured by Fuji Fiber Glass Co., Ltd.) while being applied and impregnated with a liquid unsaturated polyester resin (PS-2130 manufactured by DH Material Co., Ltd.), and a thickness of 3 to 5 mm. To.

  In the method of laminating the FRP reinforcing layer 12 shown in FIG. 4, an unsaturated polyester resin blended with a curing agent is applied to a coated / cured gel coat resin A9, B10, C11, D (not shown) with a cotton roller. Then, a surface mat is placed thereon, and an unsaturated polyester resin is applied from above with a cotton roller to impregnate the surface mat. At this time, bubbles are removed by a defoaming roller so that bubbles do not remain on the surface mat. Next, one layer of chopped strand mat is placed, and after applying an unsaturated polyester resin with a cotton roller, bubbles are removed with a defoaming roller. By this method, the lamination of 2 to 5 chopped strand mats is repeated.

  The FRP reinforcing layer 12 is cured at a normal temperature for 6 hours or more and then maintained at 60 ° C. for 120 minutes to promote the curing of the unsaturated polyester resin. The cured multicolor molded product 13 shown in FIG. 6 is removed from the FRP mold 1 after the mold temperature returns to room temperature, and cut into a predetermined size to obtain a desired product.

(Example 2)
Embodiment 2 of the present invention will be described below. The uneven pattern 2 of this embodiment is the same as the embodiment 1 shown in FIGS. 4 and 5, and is a multiple uneven pattern 2 in which the surface shape embroidered on the woven texture pattern is inverted. is there. Further, the FRP mold 1 having the pattern 2 due to the unevenness is produced in the same manner as in Example 1.

  Similar to Example 1 shown in FIG. 5, the pattern 2 with the unevenness of this example is formed by the bottom A3 of the unevenness when viewed from the surface side of the molded product 13 (below the FRP mold 1 of FIG. 4). It has the 1st pattern 4 formed, the 2nd pattern 6 formed by the uneven | corrugated top part B5, and the 3rd pattern 8 formed by the top part C7 higher than the top part B5.

  The concave and convex concave portions (bottom portion A3) and convex portions (top portions B5 and C7) of the pattern 2 are color-coded as follows.

(Process A)
Masking is carried out except for the FRP mold 1 decorative pattern portion (the area where the mold pattern 2 is present) subjected to the release treatment, and as shown in FIG. 4, first, the first color gel coat resin A9 (DH) is covered so as to cover the bottom A3. Sandooma 663KB manufactured by Material Co., Ltd. is applied with a brush so that no bubbles remain in the fine part of the decorative part. Using a polyethylene foam squeegee, squeezing is performed so that the gel coat resin A9 remains on the bottom A3 and does not remain on the top B5 and the top C7. The gel coat resin A9 remaining on the top part B5 and the top part C7 is wiped off using a cotton cloth that is strongly squeezed with acetone. Thereafter, the gel coat resin A9 is cured in a curing oven at 60 ° C. for about 20 minutes.

(Process B)
After confirming that the first color gel coat resin A9 has been cured and the mold temperature has returned to room temperature, the second color gel coat resin B10 (SANDOMA 2620PW manufactured by DH Material Co., Ltd.) is decorated in the same way as the first color so as to cover the top B5. Apply to the area with a brush. Using a polyethylene foam squeegee, the gel coat resin B10 is squeezed so as to remain on the top B5. Thereafter, the gel coat resin B10 is cured for about 20 minutes in a curing oven at 60 ° C.

  Thus, after applying multicolor gel coat A9, B10 to a decoration part, masking is removed and the gel coat resin D (not shown) with respect to the whole FRP type | mold 1 surface including a decoration part (PCG by Tokyo Ink Co., Ltd.) (VA) 308-GR-F25) is applied at a thickness of about 0.2 mm to 0.5 mm with a spray gun and cured in a 60 ° C. curing oven for about 20 minutes. Thereby, as shown in FIG. 7, the uneven part (bottom part A3) of the unevenness | corrugation of a pattern can be color-coded into two colors by the other convex part (top part B5, top part C7). In other words, only the embroidery portion that is the fine pattern 2 is color-coded, and a decorative pattern that is raised can be applied.

  The configuration, laminating method, and curing conditions of the FRP reinforcing layer 12 are the same as those in the first embodiment. The cured multicolor molded product 13 shown in FIG. 7 is demolded from the FRP mold 1 after the mold temperature returns to room temperature, and is cut into a predetermined dimension to obtain a desired product.

It is sectional drawing of a FRP type | mold and multicolor molded product in case the type | mold pattern by an unevenness | corrugation is a simple unevenness | corrugation. It is a top view of FRP type | mold in case the type | mold pattern by an unevenness | corrugation is simple unevenness | corrugation. It is a top view of a multicolor molded product when the pattern by unevenness is simple unevenness. It is sectional drawing of a FRP type | mold and multicolor molded product in case the pattern by the unevenness | corrugation of Example 1 is multiple unevenness | corrugation. It is a top view of the FRP type | mold in case the type | mold pattern by the unevenness | corrugation of Example 1 is a multiple unevenness | corrugation. It is a top view of the multicolor molded product in case the pattern by the unevenness | corrugation of Example 1 is a multiple unevenness | corrugation. It is a top view of the multicolor molded product in case the pattern by the unevenness | corrugation of Example 2 is a multiple unevenness | corrugation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... FRP type, 2 ... Mold pattern, 3 ... Bottom part A, 4 ... 1st pattern, 5 ... Top part B, 6 ... 2nd pattern, 7 ... Top part C, 8 ... 3rd pattern, 9 ... 1st color gel coat resin DESCRIPTION OF SYMBOLS 10 ... Gel coat resin of 2nd color, 11 ... Gel coat resin of 3rd color, 12 ... FRP reinforcement layer, 13 ... Molded product (multicolor molded product)

Claims (5)

A pattern is formed by the unevenness, and the pattern is formed by a first pattern formed by the bottom A of the unevenness, a second pattern formed by the top B of the unevenness, and a top C higher than the top B. FRP type having a third pattern to be used,
Step A for curing the gel coat resin A after applying the gel coat resin A of the first color so as to cover the bottom A, and squeezing the gel coat resin A so as to remain on the bottom A.
A step B of applying a second color gel coat resin B so as to cover the top B, squeezing the gel coat resin B to remain on the top B, and then curing the gel coat resin B;
Applying a third color gel coat resin C so as to cover the top C, squeezing the gel coat resin C to remain on the top C, and then curing the gel coat resin C; and
A method for producing a multicolor molded article having In claim 1,
In step A, after gel coat resin A is applied and squeezed, gel coat resin A remaining on top B and top C is wiped off with a cloth containing a solvent,
In step B, after gel coat resin B is applied and squeezed, gel coat resin B remaining on top C is wiped with a cloth soaked with a solvent.
A method for producing multicolor molded products. In claim 1 or 2,
A method for producing a multicolor molded product, wherein the pattern of the unevenness is a pattern of a woven fabric texture pattern or an embroidered decorative pattern. In any one of Claim 1 to 3,
A method for producing a multicolor molded product, wherein squeezing is performed using a polyethylene foam, a rubber foam, a polypropylene foam, a urethane foam, a rubber spatula, and a fabric as a squeegee.   A multicolor molded article produced by the production method according to claim 1.

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