JPH06344451A - Molded product with smooth surface layer and method for manufacturing the same - Google Patents

Abstract

PURPOSE:To provide a molded product of a fiber reinforced thermosetting resin which comprises the product main body and a surface layer formed on the main body which has a high degree of smoothness and gives a striped pat tern colored in different colors in one direction and provide a method for manu facturing the same. CONSTITUTION:When a thermosetting resin for molding a product main body is still uncured or semi-cured in a curing mold 5 for draw molding, resins for forming a surface layer of different color are cast in the drawing direction from more than one supply port at the ends of resin injection pipes 10, 11 on the surface of the thermosetting resin. The resins, in the edge part in particular, are arranged to be cured integrally. In this way, a molded product is obtained which has a striped pattern comprising more than one colored layer of different colors and a high degree of surface smoothness. Since the color can hardly fall out even if the surface layer is damaged, the product has a long life.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded article having a smooth surface layer in which differently colored striped patterns are formed in one direction and a method for producing the molded article.

[0002]

2. Description of the Related Art Conventionally, a molded product obtained by a pultrusion molding method has a pattern of reinforcing fibers exposed on its surface. Therefore, not only the smoothness of the surface is poor as it is, but also the fiber pattern itself has an appearance. Therefore, as a remedy, a method of forming a resin-rich surface layer by using a non-woven fabric or a mat-shaped reinforcing fiber in the surface layer portion, laminating a large amount of this resin impregnated with a matrix resin, is laminated. It is generally adopted (see "Plastic Age", Vol. 37, No. 5, p. 204, published in 1991).

[0003]

However, when a non-woven fabric or a mat-shaped reinforcing fiber is used, since the material itself is also composed of the fiber, the phenomenon that the reinforcing fiber is raised to the surface is still a problem. No material having a high surface smoothness that could be seen was obtained.

The present invention solves the above-mentioned drawbacks of the prior art, provides a molded product having a high degree of surface smoothness and a design property by coloring, and at the same time, makes the molded product efficient. The purpose of the invention is to provide a manufacturing method that can be obtained well.

[0005]

The invention according to claim 1 is
"A molded product in which a surface layer made of a thermosetting resin is formed on the surface of a molded product body made of continuous fiber reinforced thermosetting resin and which is integrally cured with the thermosetting resin of the molded product body. , The surface layer is composed of a plurality of colored layers of different colors that are substantially parallel to one direction, and a molded article having a smooth surface layer is the gist thereof.

According to a second aspect of the present invention, in a pultrusion molding method in which a reinforcing fiber is impregnated with an uncured thermosetting resin and is pulled out while being heated and cured in a curing mold, a molded product impregnated with the reinforcing fiber is formed. While the main body forming thermosetting resin is uncured or semi-cured in the curing mold, a surface layer forming thermosetting resin having a different color from each of a plurality of supply ports is provided on the surface thereof.
It has a smooth surface layer, which is cast so as to be substantially parallel to each other with respect to the drawing direction, and is cured integrally with each side edge and the thermosetting resin for forming the molded article body. The manufacturing method of molded articles "is the gist of the

According to a third aspect of the present invention, "a thermosetting resin for forming a surface layer of a molded article impregnated with a reinforcing fiber is drawn out from each of a plurality of supply ports with a different thermosetting resin for forming a surface layer. A state in which one of the surface layer-forming resins adjacent to each other undergoes a curing reaction more than the other when the side edges are cast so as to be substantially parallel to each other and the respective side edges are integrally cured. The method for producing a molded article having a smooth surface layer according to claim 2 is characterized in that the casting of the other surface layer-forming resin is delayed so that

Examples of the thermosetting resin used in the present invention include thermosetting resins such as unsaturated polyester resin, epoxy resin, vinyl ester (epoxy acrylate) resin and phenol resin. The thermosetting resin for forming the molded article main body and the thermosetting resin for forming the surface layer may be the same type of resin or different types of resins. However, in order to cure integrally, it is necessary to select and use a resin in which both resins cross-link each other at the curing stage to form a chemical bond structure. Then, the resin solid content, the polymerizable monomer, a solvent that dissolves the resin solid content such as lower alcohol used as necessary, a low shrinkage agent, a stabilizer, a lubricant, a processing aid, a plasticizer, and various other A so-called resin liquid prepared by mixing additives is used.

Among the above thermosetting resins, the surface layer forming resin is mixed with a coloring agent such as a pigment in order to color it in a desired color. Further, a filler may be used for the resin for forming the molded article body and the resin for forming the surface layer, and specific examples of the filler include calcium carbonate, aluminum hydroxide, glass powder, glass beads, glass balloons, Examples thereof include whiskers, and those which are dispersed in a solid state without being dissolved in a thermosetting resin liquid can be used, and either inorganic or organic type may be used. As for its shape, spherical particles, fibrous powder, flaky powder, or the like can be used. Further, among the fillers, those that function as a pigment can be used as the filler / pigment also in the present invention.

Examples of the reinforcing fiber used in the present invention include roving of glass fiber, carbon fiber, organic fiber and the like, continuous strand mat, chopped strand mat, cross mat, lami mat, etc. In the invention of claim 1, In addition to these rovings, various mats are used together if necessary.

In a second aspect of the present invention, the hardening die used is divided into two zones, the front side being the first hardening section and the drawing side being the second hardening section in the direction of the pultrusion molding. It is preferable that the temperature control in the curing section can be operated independently.

In the method for producing a molded article according to the second aspect of the present invention, as a means for supplying the surface layer-forming thermosetting resin while the molded article body forming thermosetting resin is uncured or semi-cured. , Opening the tips of a plurality of resin injection pipes capable of separately flowing liquid resins of different colors into the molding material passage at or near the boundary between the first and second curing sections in the curing mold. It is preferable that the resin liquid is poured from the resin liquid tank via the resin injection pipe. The injection pressure of the resin liquid at this time is about 1.0 to 10K.
It is preferable to set it within the range of gf / cm ² .

Further, the opening position of the tip of the liquid resin injection pipe of a different color at this time may be set arbitrarily, and the desired colored resin may be distributed to desired positions of the molded product. However, the molded product obtained by the manufacturing method according to the second or third aspect of the present invention is a plurality of substantially parallel different colors that run in the drawing direction by utilizing the transfer of the molding material that is continuously transferred in the drawing direction. Since the surface layer composed of the colored layer is formed, it cannot be provided at a position where the colored layers having different colors overlap with each other in the drawing direction.

In the inventions according to claims 2 and 3, in order to allow the resin for forming the surface layer having a different color to be integrally cured with a boundary as much as possible without being mixed in the molding material passage, Usually, the following molds are used.

That is, a colored layer having a predetermined width can be formed in the hardening mold at the position where the tip of the resin injection pipe is open, in a direction communicating with the molding material passage and intersecting the drawing direction. As described above, the expanded casting portion is provided so that the surface layer forming resin can be cast on the surface of the molded article main body layer forming resin which is being transferred, and the casting portion is further cast. In order for the molding material passage to be integrally cured with the molding product body layer, the front part of the molding material passage in the drawing direction from the casting part has a shape and size capable of regulating the width and thickness of the surface layer. Use a mold.

In the invention according to claim 2, "the thermosetting resin for forming a molded article body is uncured or semi-cured" means that the thermosetting resin is heated to increase its viscosity from a liquid state. Then, the time until the gelled state is reached and complete curing is reached.

As used in the invention described in claim 3, "a state in which one of the surface layer-forming resins adjacent to each other undergoes a curing reaction more than the other" means one surface colored in a certain color. When another one of the surface layer forming resins colored in another color is cast next to the layer forming resin at a position adjacent to each other, one surface layer forming resin forms another surface layer forming resin. It means a state in which curing is progressing to such an extent that it is not significantly deformed and can be integrated with another surface layer-forming resin by the pressing force of the resin for casting.

In order to achieve such a state, a casting portion of one surface layer forming resin colored in a certain color and another surface layer forming resin colored in another one of the colors are formed. The casting part
This can be achieved by providing the second curing section at a position that is moved back and forth by a certain distance with respect to the drawing direction.

In the invention described in claim 2 or 3, the other conventionally known pultrusion molding methods can be employed as they are, and after leaving the curing mold, they may be cut with a cutter to obtain a fixed length. . Molding speed is usually 20 cm / min to 2 m /
Minutes.

[0020]

According to the invention of claim 1, since the surface of the molded article body made of the continuous fiber reinforced thermosetting resin is provided with the surface layer made of the thermosetting resin, the unevenness of the reinforcing fiber of the molded article body is provided. Are concealed by this surface layer and have a smooth surface. Moreover, since the resin of the surface layer and the resin of the molded article body are integrally cured, the adhesive strength at the interface between both layers is excellent. Further, since the surface layer is composed of a plurality of coloring layers of different colors that are substantially parallel to one direction,
The surface has a striped pattern that runs in one direction, and
Even if the surface layer is damaged, the coloring does not fall off.

According to a second aspect of the present invention, while the resin for forming the molded article body is uncured or semi-cured in the curing mold, a plurality of supply ports are used for supplying the surface layer forming resin to the surface thereof. Since different color resins are cast so as to be substantially parallel to each other with respect to the drawing direction, and are cured integrally with the respective side edges and with the molded article body forming resin, The surface layer of the article comprises a plurality of substantially parallel colored layers of different colors that are joined and integrated, and is a highly smoothed surface layer, and the production of the molded article according to claim 1. Is a manufacturing method suitable for use in.

According to a third aspect of the present invention, in the second aspect of the invention, one surface layer forming resin is adjacent to the other surface layer forming resin so that one of the surface layer forming resins is in a state in which the curing reaction proceeds more than the other surface layer forming resin. Since I tried to delay the casting of the forming resin,
One of the resin for forming the surface layer is not deformed by the pressing force of the other resin during casting, and the adjacent boundary between the plurality of substantially parallel colored layers of different colors is relatively clear. can get.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention described in claims 1 to 3 will be described below in detail with reference to the drawings. FIG. 1 shows claim 2.
It is a schematic explanatory drawing which shows an example of the apparatus used for enforcing the manufacturing method of the described invention, FIG. 2 is sectional drawing which expands and shows the principal part same as the above, and FIG. 3 is the III-III line in FIG. It is a schematic sectional drawing cut | disconnected by and seen in the arrow direction.

In these figures, 1 is a reinforcing fiber composed of continuous fibers, which are continuously drawn from a plurality of bobbins. Reference numeral 2 denotes a thermosetting resin liquid tank for forming a molded article body, and the reinforcing fibers 1 continuously pass through the resin liquid tank 2 to impregnate the reinforcing fibers 1 with the resin liquid. Denoted by 3 and 3 are guides for the reinforcing fibers 1, which are arranged along the pulling direction, and the reinforcing fibers 1 are gradually aligned by this guide 3 into a cross-sectional shape to be finally shaped. Numerals 4 and 4 are cloth-shaped or mat-shaped reinforcing fibers, and in the case of this device, they are unwound from bobbins arranged above and below the reinforcing fibers 1, 1 ...
It is guided so as to be located on the surface of the resulting molded article.

Reference numeral 5 is a curing mold, and 6 is a resin-impregnated fiber.
Incidentally, the thermosetting resin for forming the molded article body may be impregnated in this way before being sent to the curing mold 5, or a resin liquid injection hole (not shown) provided near the entrance of the curing mold 5 may be provided. You may inject more. As shown in FIG. 2, the curing die 5 has a first curing section 7 approximately half on the front side, and a second curing section 8 is continuously provided in front of the first curing section 7. A molding material passage 9 is provided through the first curing section 7,
A molding material passage 18 is penetrated through the second curing section 8 so that the molding material passages 9 and 18 are communicated with each other and have a mold shape capable of molding a flat plate-shaped molded article having a surface layer.

FIG. 3 is a diagram schematically showing a cross section of a boundary between the first and second curing sections 7 and 8. By the way, at this boundary, as shown in FIG. 3, two systems of resin injection pipes 10 and 11 capable of separately feeding different color resins are provided, and each tip is branched into two, and the tip is There are four supply ports 10a, 10b and 11a, 11b in which two systems of resin are alternately arranged adjacent to each other.
Then, in the molding material passage 9 where the supply ports 10a, 10b and 11a, 11b are provided, the upper part of the mold corresponding to the first curing section 7 is greatly expanded, and the casting of the surface layer forming resin is performed. Part 12 is made. In the case of this embodiment, a molded product having a surface layer only on the upper surface of the molded product body is molded.

Reference numerals 13 and 14 respectively denote two kinds of surface layer forming resins colored in different colors, and the resin liquid tank 1
The resin liquid is made to flow into the casting portion 12 from 5, 16 through the resin injection pipes 10, 11 under pressure by a pump (not shown), and from the supply ports 10a, 10b and 11a, 11b. Then, the surface layer forming resins 13 and 14 continuously supplied to the casting part 12 are applied in layers on the surface thereof as the molded article body forming resin 17 is transferred so as to have a substantially uniform thickness. To be done. Therefore, the casting part 12
Molding material passage 18 on the front side (right side in FIG. 2)
Has a shape in which its cross section is not as wide as that of the casting part 12, but only the upper part thereof is slightly expanded.

In FIGS. 2 and 3, 19 is a heater attached to the outer peripheral wall of the first curing section 7, and 20 is a heater attached to the outer peripheral wall of the second curing section 8. Reference numeral 21 denotes a cooling water passage arranged around the resin injection pipes 10 and 11 and at a position opposite to and below the molding material passages 9 and 18, and allows cooling water to flow therethrough.
Reference numeral 22 is a take-off machine.

In order to obtain the molded article according to claim 1 using the above-mentioned apparatus, first, while pulling out a large number of reinforcing fibers 1 from the bobbin, they are passed through the resin liquid tank 2 and the guides 3, 3 ,.
While guiding the reinforcing fibers 1 and 4 to the upper and lower sides of the reinforcing fiber 1 while rewinding the reinforcing fibers 4 and 4 on the one hand and gradually exhibiting a predetermined cross-sectional shape, the hardened gold is aligned. Pour into mold 5. In this way
The resin of the resin-impregnated fiber 6 is cured in the process of passing through the curing mold 5, but is not completely cured in the stage of passing through the first curing section 7 and is maintained in an uncured or semi-cured state.
Then, the surface layer forming resins 13 and 14 are injected from the resin injection pipes 10 and 11 from the resin liquid tanks 15 and 16 under pressure by a pump. The resin injection pressures at this time are substantially equal pressure.

The injected surface layer forming resins 13, 14
Is poured from the supply ports 10a, 10b and 11a, 11b into the casting part 12, and is cast on the surface of the molded product body forming resin 17 which is being molded. Then, as the molded body forming resin 17 is transferred, the surface layer forming resin 1
3, 14 are introduced into the molding material passage 18 from the casting portion 12. Then, the molded article body forming resin 17 in the semi-cured state and the supplied surface layer forming resins 13 and 14 are heated while passing through the second curing section 8 of the curing mold 5. The surface layer forming resins 13 and 14 are gradually shaped into a predetermined shape, and the molded article body forming resin 17 is formed.
It is cured together with. Then, the cured product becomes a molded product M1 and is taken by the take-up machine 22,
Further, it is cut by a cutter (not shown).

FIG. 4A is a plan view of the molded product M1 molded in this way, and FIG. 4B is a transverse sectional view thereof. Surface layer 24 laminated on the upper surface of molded article body 23
The A colored layer 241 formed of the surface layer forming resin 13 and the B colored layer 242 formed of the surface layer forming resin 14 are arranged alternately, and the boundary between them is slightly meandering. The molded product M1 has a two-tone color stripe pattern.

In the above apparatus, the cross-sectional area of the molding material passage 18 in the second hardening section 8 is set larger than the cross-sectional area of the molding material passage 9 in the first hardening section 7. Is the surface layer 24 of the molded product M1, and the thickness of the surface layer 24 can be arbitrarily set depending on the degree of increase in the cross-sectional area.
In order to stably and continuously obtain the molded product M1, the surface layer 24
The thickness is preferably 80 to 250 μm. The width dimension of each of the colored layers 241 and 242 forming the surface layer 24 depends on the amount of resin for forming the surface layer and can be adjusted by the resin pressure, the diameter dimension of the resin injection pipe, and the like.

In the above embodiment, an example of a striped pattern consisting of two colors was shown, but if the number of resin injection pipes is increased, a striped pattern of three or more colors can be obtained in the same manner. .

FIG. 5 is an example of an apparatus suitable for carrying out the manufacturing method of the invention described in claim 3, FIG. 6 is an enlarged cross-sectional view showing only the main part thereof, and FIG. 7 is the same as above. ,
Fig. 8 is a schematic diagram showing the positional relationship of the resin supply ports, and Fig. 8 (a) is a cross-sectional view taken along line VIII-VIIII of the same and viewed in the direction of the arrow. ) Is also VIII RO-VI
FIG. 2 is a sectional view taken along line II and viewed in the direction of the arrow. In these figures, the same parts as those of the device for carrying out the invention according to claim 2 are denoted by the same reference numerals.

The device shown in FIGS. 5 to 8 has a striped pattern composed of two colors, but is composed of three colored layers, the colored layers at both ends have the same color, and only the central colored layer is different. It is possible to mold a molded product M2 that is colored and has a striped pattern in which each color boundary is straight.

In the present apparatus, at the boundary between the first and second curing sections 7 and 8, the first casting portion 2 which is divided into left and right parts.
5, the second casting portion 26 having a width corresponding to the left and right separation distances of the first casting portions 25 and 25 is formed at a position forward of the distance L in FIG. The formed point and the tip of the resin inflow pipe 10 are bifurcated,
The ends thereof are made into supply ports 10c and 10d and communicate with the first casting part 25, but the resin inflow pipe 11 is not branched and the end thereof is made the supply port 11c and is connected to the second casting part 26. The points of communication are different from those of the above-described embodiment.

Thus, the surface layer forming resins 27, 28 injected from the resin injection pipe 10 are poured into the first casting parts 25, 25 from the supply ports 10c, 10d and are being molded. It is divided into left and right and cast on the surface of the resin 17 for forming the article body. Then, the molded product body forming resin 17
The surface layer forming resins 27, 28 are introduced into the molding material passage 18 from the first casting parts 25, 25 with the transfer. Then, the resin 1 for forming a molded article body in a semi-cured state
7 and the supplied surface layer forming resins 27 and 28 are heated in the process of passing through the second curing section 8 of the curing die 5, and the curing thereof progresses. Then, when reaching the second casting portion 26, the surface layer forming resin 29 poured from the resin injection pipe 11 enters between the surface layer forming resins 27 and 28, and is gradually formed into a predetermined shape. Shaped.

The surface layer forming resins 27, 28, 2
9 and the molded body main body forming resin 17 are integrally cured, but surface layer forming resins 27, 2
Since No. 8 has been cured to some extent, its side edges are not easily deformed by the casting pressure of the surface layer forming resin 29, and the side edges act as mold cavities of the surface layer forming resin 29. Of.

FIG. 4C is a plan view of the molded product M2 molded in this way, and FIG. 4D is a transverse sectional view thereof. The surface layer 31 laminated on the upper surface of the molded article body 30 is
Two C colored layers 311 formed by the surface layer forming resins 27 and 28, and a D colored layer formed by the surface layer forming resin 29 and located between the C colored layers 311 and 311. Molded article M consisting of the layer 312 and having a two-tone color stripe pattern in which the boundary line clearly draws a straight line
It is 2.

Example 1 Using the device shown in FIGS.
According to the above-mentioned molding process, molding was performed using the following molding material and molding conditions to obtain a molded product M1 according to claim 1. (1) Molding material. Molded article body Reinforcing fiber; Glass roving; (Asahi Fiber Co., No. 4450) and continuous matte (Asahi Fiber Co., No. 450) resin; Isophthalic acid unsaturated polyester resin 100 parts by weight Curing agent; t-butyl Peroxybenzoate 1.4 parts by weight Filler; Calcium carbonate 10 parts by weight Internal release agent; Orthophosphoric acid internal release agent 0.7 parts by weight. Surface layer 24 (however, in the case of colored layer 241) Resin; Isophthalic acid type unsaturated polyester resin 100 parts by weight Curing agent; t-Butylperoxybenzoate 1.5 parts by weight Filler; Glass powder (M-500S, average particle diameter) 35 μm manufactured by Nippon Fellow Co., Ltd.) 100 parts by weight Internal release agent; Orthophosphoric acid-based internal release agent 0.7 parts by weight Pigment; Red pigment (Dainichi Seika Kogyo KK, ST5277) 3.0 parts by weight. Surface layer 24 (however, in the case of coloring layer 242) Titanium oxide (manufactured by Dainichiseika Kogyo KK, ST520) as a pigment
Same as, except that 1) was used in the same amount.

(2) Molding conditions Mold temperature; first curing section 100 ° C. second curing section 150 ° C. near opening of resin injection pipe 60 ° C. Mold size; total length = 1000 mm, (first curing section = 5
00 mm, second curing section = 500 mm) Resin injection pressure; 3 to 5 Kgf / cm ² take-up speed; 40 cm / min Molded product size; 200 (width) × 3 (thickness) mm

Example 2 Using the apparatus shown in FIGS. 5 to 8, according to the molding step,
Molding was performed using the following molding material and molding conditions to obtain a molded product M2 according to claim 1. (1) Molding material. Molded product body Same as in Example 1. ． Surface layer 31 (however, in the case of colored layer 311) Same as Example 1 except that phthalocyanine green (ST5266 manufactured by Dainichiseika Kogyo KK) was used as the pigment. ． Surface layer 31 (however, in the case of coloring layer 312) Same as the surface layer 24 of Example 1 (however, in case of the coloring layer 242).

(2) Molding conditions The same as Example 1 except that the distance between the resin injection pipes 10 and 11 was set to 200 mm. The molded products M1 and M2 obtained in each of the above examples were molded products having desired quality.

[0044]

According to the invention of claim 1, since the surface layer of the thermosetting resin is provided on the surface of the molded article body made of the continuous fiber-reinforced thermosetting resin, the reinforcing fiber of the molded article body is provided. The surface irregularities are hidden by this surface layer and have a smooth surface. Moreover, since the resin of the surface layer and the resin of the molded article body are integrally cured, the adhesive strength at the interface between both layers is excellent. Further, since the surface layer is composed of a plurality of differently colored layers that are substantially parallel to one direction, the surface has a striped pattern that runs in one direction, and even if the surface layer is damaged, it is not colored. Do not fall off. Therefore, the molded product has both a high degree of surface smoothness and a design property due to coloring, and has a long product life.

Therefore, the present molded article is suitably used for building articles and other applications.

According to a second aspect of the present invention, while the resin for forming the molded article body is uncured or semi-cured in the curing mold, the surface layer forming resin is supplied to the surface thereof by a plurality of supply ports. Since different colors of resin are cast so that they are substantially parallel to each other in the drawing direction, and the side edges of each and the resin for forming the molded article body are integrally cured, a high-level surface is obtained. This is a manufacturing method suitable for manufacturing the molded product of the invention according to claim 1, which is capable of efficiently molding a product having both smoothness and designability due to coloring and having a long product life.

According to a third aspect of the present invention, in the second aspect of the invention, one surface layer forming resin is adjacent to the other surface layer forming resin so that the curing reaction proceeds more than the other surface layer forming resin. Since I tried to delay the casting of the forming resin,
The molded product according to claim 1, wherein the resin for forming one surface layer is not deformed by the pressing force of the other resin during casting and the boundary between the colored layers requires a clear striped pattern. It is a manufacturing method suitable for manufacturing.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an example of an apparatus for manufacturing a molded article according to the first aspect of the invention, which is used for carrying out the manufacturing method according to the second aspect of the invention.

FIG. 2 is a cross-sectional view showing an enlarged main part of the same.

3 is a schematic cross-sectional view taken along the line III-III in FIG. 2 and viewed in the direction of the arrow.

4 (a) is a plan view of a molded product of the invention of claim 1 molded by the manufacturing method of the invention of claim 2, and FIG. 4 (b) is a cross-sectional view of the same. Yes, the same figure (c)
[FIG. 3] is a plan view of a molded product of the invention of claim 1 molded by the manufacturing method of the invention of claim 3, and FIG.

FIG. 5 is a schematic explanatory view showing an example of an apparatus for producing the molded article according to the first aspect of the invention, which is used for carrying out the production method according to the third aspect of the invention.

FIG. 6 is an enlarged cross-sectional view showing the main part of the above.

FIG. 7 is a schematic diagram showing a positional relationship between resin supply ports in the above.

FIG. 8 (a) is a cross-sectional view taken along the line ii in the same figure as seen in the direction of the arrow, and FIG. 8 (b) is similarly cut along the line loo, and shown in the direction of the arrow. FIG.

[Explanation of symbols]

 M1, M2 Molded product 1, 4 Reinforcing fiber 2 Thermosetting resin liquid tank 5 Curing mold 6 Resin impregnated fiber 7 First curing section 8 Second curing section 9, 18 Molding material passage 10, 11 Resin injection pipe 10a , 10b, 10c, 10d Supply port 11a, 11b, 11c Supply port 12 Casting part 13, 14, 27, 28, 29 Surface layer forming resin 15, 16 Resin liquid tank 17 Molded product body forming resin 19, 20 Heater 21 Cooling channel 23, 30 Molded product body 24, 31 Surface layer 25 First casting part 26 Second casting part 241, 242, 311, 312 Colored layer

Claims (3)

[Claims] 1. Molding in which a surface layer made of a thermosetting resin is formed on the surface of a molded article body made of continuous fiber reinforced thermosetting resin, and the surface layer is made to cure integrally with the thermosetting resin of the molded article body. A molded article having a smooth surface layer, characterized in that the surface layer comprises a plurality of differently colored layers that are substantially parallel to one direction. 2. A pultrusion molding method in which reinforcing fibers are impregnated with an uncured thermosetting resin and the fibers are pulled out while being heated and cured in a curing mold, and the thermosetting resin impregnated with the reinforcing fibers is used for forming a molded article body. While the surface is uncured or semi-cured in the curing mold, thermosetting resins for forming surface layers of different colors are provided on the surface of the curing mold so as to be substantially parallel to each other in the drawing direction. A method for producing a molded article having a smooth surface layer, characterized in that the molded article is cast on the respective side edges and is cured integrally with the thermosetting resin for forming the molded article body. 3. A thermosetting resin for forming a molded article body impregnated with reinforcing fibers, the thermosetting resin for forming a surface layer having different colors from a plurality of supply ports are substantially parallel to each other in the drawing direction. When one side surface resin forming resin is cast to be integrally cured with the other side edges, one of the surface layer forming resins adjacent to the other side surface is formed so that the curing reaction proceeds more than the other. The method for producing a molded article having a smooth surface layer according to claim 2, wherein the casting of the surface layer forming resin is delayed.