JPH09123198A - Manufacture of decorated molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make molding failure less apt to occur by preventing the flowing of the resin content of a thermosetting molding material between a decorating sheet and a mold in the case of molding a decorated sheet laminated molding having a design such as a free pattern or color. SOLUTION: The method for manufacturing a decorated molding comprises the steps of increasing in size the thermosetting molding material 4 in contact with the sheet 3 of the molding material 4 to larger than the sheet 3 to manufacture a decorated molding 11 by heat compression molding a decorating sheet 3 in the state that the sheet is interposed between either a stationary mold 2 or movable mold 1 and thermosetting molding material 4 in contact with the other mold, and setting the clamping velocity of the mold 1 from when the mold 1 is brought into contact with the material 4 or the sheet 3 to the clamping to 0.05 to 8mm/sec.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a decorative sheet and a thermosetting molding material, which are placed in a mold so as to overlap each other and subjected to heat compression molding to integrate the decorative sheet and the molding material. The present invention relates to a method for producing a decorative molded product that exhibits various designs having a desired pattern or color by using a decorative sheet.

[0002]

2. Description of the Related Art Conventionally, in the field of FRP (glass fiber reinforced plastic), especially in the production of FRP bathtubs, bath unit floors, etc., a method called a hand lay-up molding method or a spray-up molding method has been widely adopted. However, these methods have taken a long time and a lot of man-hours to produce one product. Therefore, as a material for significantly improving these productivity, thermosetting molding materials such as sheet molding compound (hereinafter abbreviated as SMC) or bulk molding compound (hereinafter abbreviated as BMC) have been developed. A heat compression molding method using this is widely adopted at present.

However, in the heat compression molding of SMC or BMC using only the thermosetting molding material, the color of the entire molded article is limited to a single color. The only problem is that only red ones can be produced, and the freedom of patterns and colors is narrowed. Of course, if the molded product is subjected to post-processing such as printing or painting, it is possible to add a design having an appropriate pattern or color, but in this case, it is necessary to add a complicated post-processing step, Productivity is further reduced.

Therefore, as a method of decorating these FRP products, there has been proposed a method of insert-molding a decorating sheet for adding a design having a desired pattern or color to a molded product. For example, a method has been proposed in which a decorative sheet obtained by printing a desired pattern on a substrate such as a glass cloth, a glass mat, a non-woven fabric, or a woven fabric is laminated on the SMC and molded to obtain a molded product.

Further, in Japanese Patent Laid-Open No. 5-285973, titanium paper on which a desired pattern is printed is impregnated with a thermosetting resin, and the molding surface of the lower die (the portion to be decorated).
Is disclosed, and then the SMC is placed on the entire molding surface and molded to obtain a decorative molded product.

[0006]

However, in the conventional molding method described in the above publication, the resin component of the SMC flows in, that is, the resin component of the thermosetting molding material is filled in the gap between the mold and the decorative sheet. Has a disadvantage that the resin content adheres to the outer surface of the peripheral portion of the decorative sheet, resulting in a defective product. Therefore, the molding efficiency is very poor, and the relatively poor flow-in defect is corrected. Although it is possible to make a product by applying this, since this correction work is manual work, it requires manpower and time,
It has a drawback that the total cost becomes very high.

The present invention has been made to solve the above-mentioned drawbacks, and when molding a decorative sheet laminated molded product having a design such as a free pattern, color, etc., it can be formed between the decorative sheet and the mold. It is an object of the present invention to provide a method for producing a decorated molded article, in which the resin component of the thermosetting molding material is less likely to flow in and molding defects are less likely to occur.

[0008]

The method for producing a decorative molded article according to the present invention is devised to achieve the above-mentioned object, and the decorative sheet is either a fixed type or a movable type. In the method for producing a decorated molded product by heat-compressing the mold in a state of being interposed between the mold and the thermosetting mold material that is in contact with the other mold, in the thermosetting molding material, The size of the thermosetting molding material that comes into contact with the decorative sheet is made smaller than the size of the decorative sheet, and the deadline of the movable mold from when the movable mold comes into contact with the thermosetting molding material or the decorative sheet until the dead end. Speed from 0.05 to
The feature is that it is 8 mm / sec.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The decorative sheet used in the present invention is a colored or printed sheet-like reinforcing material. This decorative sheet can be appropriately impregnated with a thermosetting resin composition. When the thermosetting resin composition is impregnated, the thermosetting resin composition is hardened in the mold, and a hard and excellent decorated surface can be obtained.

Examples of the sheet-like reinforcing material include woven and non-woven fabrics made of paper, glass fibers, and synthetic fibers (polyethylene, polypropylene, rayon, nylon, etc.).

Specific examples of the sheet-like reinforcing material include titanium paper, overlay paper, high-quality paper, medium-quality paper, waste paper, art paper, coated paper, glass chop strand mat, glass filament mat, glass continuous mat, Examples include glass roving cloth, glass surface mat, polyester woven cloth, nylon woven cloth, polyester non-woven cloth, and polypropylene non-woven cloth.

The basis weight of the above-mentioned paper, woven fabrics and non-woven fabrics made of organic fibers is generally 10 to 300 g / m ² , while the basis weight of woven fabrics and non-woven fabrics made of inorganic fibers is generally 100 to 500 g / m ^2. .

The amount of the thermosetting resin composition impregnated in the sheet-shaped reinforcing material is, when an organic type is used as the sheet-shaped reinforcing material, relative to the total weight of the impregnated sheet after impregnation. It is preferably blended so as to be 30 to 70% by weight, more preferably 40 to 60% by weight.

On the other hand, when an inorganic material is used as the sheet reinforcing material, the impregnated amount of the thermosetting resin composition is 10 to 50% by weight based on the total weight of the impregnated sheet after impregnation. It is preferably blended so as to be, and more preferably 20 to 40% by weight.

The method of decorating the sheet includes printing and coloring. Here, the printing method may be any conventionally known method, and specific examples thereof include a gravure printing method, an offset printing method, a screen printing method, and a letterpress printing method. Further, the coloring method may be a known method, and examples thereof include a method of using fibers colored with a dye.

In order to improve the design, a sheet-shaped reinforcing material or a thermosetting resin composition is granulated with a thermosetting resin molded product crushed, natural mica, colored mica, cold water stone,
Pattern materials such as natural stone powder, shells, and metal powder, pigments, and dyes may be added.

In the present invention, when the decorative sheet is impregnated with the thermosetting resin composition, examples of the thermosetting resin composition include unsaturated polyester resin, epoxy acrylate resin, diallyl phthalate resin, melamine resin and urethane. Examples thereof include acrylate resin and phenol resin.

If necessary, a solvent, a copolymerizable monomer, or the like may be added to the above-mentioned thermosetting resin composition. For example, in the case of a resin having a high viscosity, a solvent or the like is added to improve the impregnating property to reduce the viscosity. Further, in the case of a resin having low reactivity, it is possible to improve the reactivity by adding a copolymerizable monomer such as styrene, α-methylstyrene, divinylbenzene, vinyltoluene, diallylphthalate, various acrylate monomers and various methacrylate monomers. .

The amount of the above-mentioned copolymerizable monomer added is usually
It is 0 to 100 parts by weight with respect to 100 parts by weight of the thermosetting resin.

If desired, various fillers and additives may be added to the thermosetting resin composition. Specifically, fillers such as calcium carbonate, alumina, aluminum hydroxide, polymerization initiators such as organic peroxides, polymerization inhibitors such as parabenzoquinone, internal mold release agents such as zinc stearate, fungicides, Preservatives, antioxidants, etc. are added in appropriate amounts.

As a method for producing the decorative molding sheet, a conventionally known method can be used. That is, for example, the sheet base material is immersed in a tank containing resin to impregnate the resin,
Press the base material with a roll etc. to remove excess resin and dry it in a drying oven if necessary, or flow the sheet base material on a belt, place the resin on it and roll it. Alternatively, there is a method of squeezing the resin and the base material with a blade or the like.

In the present invention, as the thermosetting molding material, those conventionally used as various thermosetting molding materials such as SMC and BMC can be used.

An example of preparation of the thermosetting molding material is as follows.

That is, an unsaturated polyester resin, an epoxy acrylate resin, a urethane acrylate resin or the like is used as the thermosetting resin, and if necessary, various fillers, reinforcing materials, additives, etc. are added, and a conventionally known method is used. A thermosetting resin composition having a form such as SMC, BMC or the like is prepared.

The manufacturing method of the present invention is carried out using the above-mentioned materials, and the specific operation is as follows.

As the molding machine used in the present invention, a conventionally known press molding machine can be used. As the mold, conventionally known molds, casting molds and the like can be used.

As the type of mold, generally, the upper and lower molds are preferably used. In this case, the upper mold is usually used as a movable mold and the lower mold as a fixed mold.

The above molding machine is attached to the above molding machine,
After heating to 80 to 180 ° C., the decorative sheet, which is the material to be compression-molded, and the thermosetting molding material are placed at predetermined positions in the mold with the mold open.

Here, the temperature of the mold is 80 to 180 ° C, preferably 85 to 165 ° C. Especially, general-purpose S
When a molding material for high temperature such as MC and BMC is used, the temperature is preferably 100 to 155 ° C., and when a molding material for low temperature molding, which is so-called low temperature SMC, is used, it is 85 to 85 ° C. The temperature is preferably 100 ° C. In addition, if the mold temperature is too low, the molding material is hard to solidify sufficiently, and if the mold temperature is too high, it is difficult to obtain sufficient fluidity of the molding material.

The size of the decorative sheet may be a large size for decorating the entire surface of the molded product, or may be a small size for decorating a part of the surface of the molded product. It doesn't matter. That is, the size of the decorative sheet is
It may have any size and shape depending on the desired pattern or design such as color.

On the other hand, regarding the shape of the thermosetting molding material and the positional relationship between the decorative sheet and the thermosetting molding material, the thermosetting molding of the portion of the entire thermosetting molding material that comes into contact with the decoration sheet is performed. The size of the material is made smaller than the size of the decorative sheet, and this is arranged inside the decorative sheet.

For example, when the entire decorative surface of a molded product is decorated with a decorative sheet, a thermosetting molding material that is smaller than the decorative sheet is placed so as to be inside the decorative sheet.

When the entire decorative surface of the molded product is decorated with a decorative sheet, the area ratio of the thermosetting molding material to the decorative sheet is usually in the range of 40 to 99%. here,
Area ratio of thermosetting molding material to decorative sheet is 40%
If it is less than the above range, the decorative seam is easily broken, which is not preferable. When the area ratio exceeds 99%, the resin component of the thermosetting molding material flows into the decorative portion, that is, the resin component of the thermosetting molding material flows into the gap between the mold and the decorative sheet. However, a defective product in which the resin component adheres to the outer surface of the peripheral portion of the decorative sheet is likely to occur, which is not preferable.

On the other hand, when a decorative sheet is used to decorate a part of the decorative surface of the molded product, the thermosetting molding material which comes into contact with the decorative sheet is made smaller than the decorative sheet, Stack it on the inside of the decorative sheet. Then, a thermosetting molding material having substantially the same size as the decorative surface portion is placed on the other decorative surface portion which is not decorated with the decorative sheet.

In other arrangements, that is, when the thermosetting molding material has the same size as the decorative sheet and the thermosetting molding material is overlaid, or the thermosetting molding material has the same size as the decorative sheet. In the case where the decorative sheets are arranged in a larger size, the decorative sheet is torn and the resin component of the thermosetting molding material easily flows into the decorative portion, which is not preferable.

When a part of the decorative surface of the molded product is decorated with a decorative sheet, the area ratio of the thermosetting molding material in contact with the decorative sheet is 50 to 99% with respect to the decorative sheet. And
Here, if the area ratio of the thermosetting molding material that comes into contact with the decorative sheet is less than 50%, the decorative sheet is easily broken, which is not preferable. If the area ratio exceeds 99%,
It is not preferable because the resin component of the thermosetting molding material easily flows into the decorative portion.

The cutting pattern of the thermosetting molding material in contact with the decorative sheet has a size of 2 to 25 cm inward from each side of the decorative sheet in consideration of the efficiency of the thermosetting material and the above area ratio. It is cut into the shape.

When the decorative sheet is a small one that decorates a part of the surface of the molded product, the method for disposing the thermosetting molding material on the non-decorated surface is not particularly limited, In general, the thermosetting molding material is sized so as to be almost the same as the height of the thermosetting molding material placed on the decorative surface, and is arranged in the central portion of the non-decorative surface. If the height of the thermosetting molding material on the decorative surface is significantly different from that on the non-decorating surface, the decorative sheet may be tilted during the deadline of the mold and the decorative sheet may be displaced, which is not preferable.

Here, regarding the vertical relationship between the decorative sheet and the thermosetting molding material, first, the decorative sheet is placed at a predetermined position on the molded product to be decorated, and the thermosetting molding material is placed thereon. Generally, they are arranged in a stack, but if the positional deviation of the decorative sheet is small, the molding material may be placed on the lower side, if necessary.

The decorative sheet is usually placed on the mold side, that is, on the product surface side, which is printed or colored. However, if necessary, the molding material side is printed. Alternatively, it may be a colored surface.

Further, in the present invention, if necessary,
A glass mat, a glass cloth, a non-woven fabric, a cloth, a paper or the like impregnated with a resin or the like may be appropriately inserted between the decorative sheet and the molding material.

In this way, the decorative sheet and the thermosetting molding material are arranged in a laminated form in the mold, and then the mold is clamped. The stage of clamping the mold is roughly divided into the following three steps.

That is, the movable mold is brought close to the molding material or the decorative sheet at high speed. The speed of the movable mold is reduced until the movable mold comes into contact with the molding material or the decorative sheet from the vicinity of the molding material or the decorative sheet.

After the movable die comes into contact with the molding material or the decorative sheet, the molding material is pushed away while being pressed to be molded, and the molding is finished. There are three steps.

However, in the case of a molding machine having a short mold opening / closing stroke, defects such as pregel may not occur even if the step is not taken. In this case, of course,
It is also possible to perform only the low-speed deadline process without performing the process of.

Here, in the process, the movable die can be moved at an arbitrary speed until the movable die approaches the vicinity of the molding material or the decorative sheet. However, if the operating speed of the mold here is too slow, the operating speed of the molding material and the decorative sheet will be hardened before flowing and lose fluidity, which may cause defective molding such as lack of wall. Is 20m
It is preferably m / sec or more, more preferably 50
mm / sec or more. In the above claims, "the movable mold comes into contact with the molding material or the decorative sheet" means, when the decorative sheet is placed on the lower mold, the time when the movable upper mold comes into contact with the molding material. When arranging the decorative sheet on the molding material placed on the mold, it means the time when the movable upper mold comes into contact with the decorative sheet. At this time, a decorative sheet laminated with a release film may be used,
In that case, it means the time when the movable upper mold comes into contact with the peeling film.

Here, the term "nearby" varies depending on the performance of the molding machine, but is suitable for smoothly reducing the operating speed of the movable mold from the high speed operating state of the process to the low speed operating state of the process in the molding machine used. Say the distance In a general-purpose press molding machine, the distance is about 30 to 50 mm.

In the step, the gradual speed is reduced until the movable die comes into contact with the molding material or the decorative sheet from the vicinity thereof.

In the step, the shut-off speed from the contact of the movable die with the molding material or the decorative sheet to the shut-off is preferably 0.05 to 8 mm / sec, and preferably 0.5 to 8 mm / sec. 4 mm / sec.

Here, the shut-off speed from the contact of the movable die with the molding material or the decorative sheet to the shut-off is 0.05.
If it is less than mm / sec, the viscosity of SMC is significantly reduced while flowing in the mold, and the resin component of SMC flows in, that is, the resin component of SMC flows into the gap between the mold and the decorative sheet, A defective product is produced in which the resin component adheres to the outer surface of the peripheral portion of the decorative sheet. In addition, pre-gel is likely to occur, which is not preferable. On the other hand, if the shut-off speed exceeds 8 mm / sec, the decorative sheet is suddenly subjected to pressure, so that the decorative sheet tends to be stretched and distorted, wrinkled, or broken.

The above-mentioned shut-off speed refers to the average shut-off speed from the time when the movable die comes into contact with the molding material or the decorative sheet to the time when the movable die is shut off.

Therefore, as long as the average shutoff speed is within the above range, it is possible to shift gears before the shutoff.
When shifting is performed in this manner, the deadline speed when the movable die comes into contact with the molding material or the decorative sheet is 2 to 12
It is generally mm / sec. The deadline speed immediately before the deadline is generally 0.05 to 3 mm / sec.

Here, the mold clamping speed in the process can be controlled by a conventionally known method. In other words, if a molding machine equipped with a speed control function is used, it is acceptable.If a molding machine equipped with an output control method is used, a preliminary test is performed in advance to confirm the deadline. It suffices to measure the output range that is the speed and perform molding under the conditions. As a method of measuring the deadline speed, for example, the deadline speed can be measured by measuring the time and the height of the slide with a position sensor.

After closing the mold in this way, 2-1
After pressure molding is carried out at a pressure of 50 kg / cm ² for 30 seconds to 15 minutes to cure the object to be molded, the mold is opened and the product is demolded to obtain a laminated decorative molded product.

Here, the molding pressure is 2 to 150 kg.
/ Cm ² , preferably 10 to 120 kg / cm ² . In particular, when a molding material such as general-purpose SMC or BMC is used, it is preferably 50 to 120 kg / cm ^2, and when a molding material for low pressure molding, which is so-called low pressure SMC, is used. , 5-25
It is preferably set to kg / cm ² . If the molding pressure is too low, the molding material has a drawback that it is difficult to obtain sufficient fluidity. On the contrary, if it is too high, the mold is likely to deteriorate during mass production, which is not preferable in any case.

(Operation) According to the method for producing a decorative molded product of the present invention, the size of the thermosetting molding material which comes into contact with the decorative sheet among the thermosetting molding materials is determined from the size of the decorative sheet. Cut it into small pieces and stack them on the inside of the decorative sheet (so that they do not stick out to the outside), so that when the thermosetting molding material flows in the mold, the decorative sheet should be in close contact with the mold. However, it becomes difficult to form a gap between the mold and the decorative sheet, and therefore, the resin component of the thermosetting molding material flows between the decorative sheet and the mold to add the resin component. If the defective product is attached to the outer surface of the decorative sheet,
It can be effectively prevented.

Further, the shut-off speed from the time when the movable die comes into contact with the molding material or the decorative sheet to the time when it is shut down is 0.05.
By setting it within the range of up to 8 mm / sec, the shut-off speed becomes too fast, the flow of SMC becomes slow, and the viscosity of SMC remarkably decreases due to the heat received during that time, and the resin component of the SMC flows in. Or pre-gel occurs,
No such molding defects will occur. On the contrary, the cut-off speed is too slow, and the decorative sheet is suddenly subjected to pressure so that the decorative sheet is not stretched and distorted, wrinkled, or broken again.

[0059]

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

FIG. 1 shows a waterproof pan (11) manufactured by the method of the present invention.

FIG. 2 shows an apparatus for carrying out the method of the present invention, which is in a state before molding by the upper and lower molds, and is in a state of being deviated from the plane by 90 degrees in plan view. .

1. Preparation of molding machine and mold In FIG. 2, as a molding machine, 800 manufactured by Kawasaki Yuko Co., Ltd.
A Tonpress molding machine was used.

As the upper and lower molds (1) and (2), 166 cm × 11
A mold for molding a 6 cm waterproof pan (11) was prepared.

Steam pipes (not shown) were embedded in both the upper mold (1) and the lower mold (2).

In this embodiment, recesses (5) having a width of 2 mm, a length of 45 mm, and a height of 1 mm are provided in parallel in the right half of the upper surface of the lower mold (2) at predetermined intervals. It was

This mold was attached to the above press molding machine. The upper mold (1) was a movable mold and the lower mold (2) was a fixed mold.
On the side edge of the lower mold (2), a guide pin for positioning
(6) is provided to project upward, and the upper mold (1) is correspondingly provided.
A guide hole (7) is provided in the.

2. Adjustment of decorative sheet The decorative sheet (3) was adjusted as follows.

1) Preparation of impregnating resin liquid (1) Unsaturated polyester resin liquid (number average molecular weight of about 830
100 parts by weight of 0: isophthalic acid type unsaturated polyester resin dissolved in acetone: toluene mixed solvent (1: 1), solvent 35% by weight (2) Polymerization initiator (tertiary butyl peroxybenzoate) 1 part by weight Parts The above-mentioned (1) unsaturated polyester resin liquid and (2) polymerization initiator were mixed and stirred to obtain a resin liquid for impregnation.

2) Adjustment of decorative sheet Decorative sheet 1: titanium paper (thickness 0.1 mm, 80 g / m
² , PM11P: manufactured by Kojin Co., Ltd., which has a stone pattern printed on it, is cut into a size of 80 cm × 100 cm, and the cut pieces are immersed in the above resin liquid to impregnate the resin, and then the excess is rolled. After impregnating the resin and drying, an impregnated sheet was obtained. A notch having a radius of 10 cm was provided at the center of the long side. The base material (paper) content of the obtained decorative sheet was 50% by weight.

Decorative sheet 2: non-woven fabric (made of polyester,
Thickness 0.36 mm, 40.7 g / m ^Two, Sontara # 80
00: Made by Toray-Dupont) with a stone pattern printed
A decorative sheet 2 was obtained in the same manner as the decorative sheet 1 except that it was used.
Was. The weight ratio of the base material in this decorative sheet is 50% by weight.
Met.

Decorative sheet 3: glass cloth (thickness 0.2
5mm, 200g / m ² , plain weave, WF230100B
S6: Nitto Boseki Co., Ltd.), a decorative sheet 3 was obtained in the same manner as the decorative sheet 1 except that a stone pattern was printed. The weight ratio of the base material in this decorative sheet was 35% by weight.

Decorative sheet 4: overlay paper (thickness: 0.
A decorative sheet 4 was obtained in the same manner as the decorative sheet 1 except that a stone pattern was printed on 12 mm, 100 g / m ² (manufactured by Kojin Co., Ltd.). The base material (paper) content of this decorative sheet was 45% by weight.

3. Preparation of molding materials The following materials were used as molding materials.

(1) Unsaturated polyester resin liquid (even if an isophthalic acid-based unsaturated polyester resin having a number average molecular weight of about 2000 is dissolved in styrene, the styrene concentration is 40% by weight) 70 parts by weight (2) Polystyrene resin liquid ( Weight average molecular weight about 95,000
Polystyrene resin dissolved in styrene, styrene concentration 65% by weight) 30 parts by weight (3) Polymerization initiator (tertiary butyl peroxybenzoate) 1 part by weight (4) Calcium carbonate powder (NS-100: Nitto powder) Chemical Co., Ltd.) 120 parts by weight (5) Coloring pigment (titanium oxide powder, SR-1: Sakai Chemical Industry Co., Ltd.) 6 parts by weight (6) Thickener (magnesium oxide powder, average particle size about 3 μ)
m, Kyowamag 150: Kyowa Chemical Industry Co., Ltd.) 1 part by weight (7) Internal mold release agent (zinc stearate: Sakai Chemical Industry Co., Ltd.)
3 parts by weight (8) Glass fiber (Roving made by Asahi Fiber Glass Co., Ltd .: ER4630LBD168W cut into a length of 25 mm, hereinafter abbreviated as GF) 70 parts by weight (1) Unsaturated polyester resin liquid ,
(2) polystyrene resin solution, (3) polymerization initiator, (4) calcium carbonate powder, (5) color pigment, (6) thickener, and (7)
After mixing the ingredients of the internal mold release agent and thoroughly kneading, the resulting kneaded product is (8) impregnated into glass fiber by an SMC manufacturing apparatus and aged at 40 ° C. for 24 hours to obtain a thickness. A colored (white) SMC molding material (4) of about 2 mm was obtained.

4. Molding method The SMC molding material (4) and the decorative sheet (3) thus obtained were molded as follows.

(Example 1) Upper mold (1) was placed at 135 ° C.
After heating (2) to 145 ° C., the decorative sheet 1 as a decorative sheet (3) is placed on the decorative pattern of the lower mold (2), and the size of the SMC is 60 cm × 90 cm. Six pieces cut into pieces were placed at a position of 5 cm inward from the long side, the short side, and the cutout portion of the decorative sheet (3).

The SMC 6 is placed in the center of the undecorated portion of the lower mold (2).
Five pieces cut into a size of 0 cm × 100 cm were placed.

The upper die (1) is 50 mm / sec up to 30 mm above the position where it contacts SMC, 30 mm above the position where it contacts SMC to 80 mm / sec until it contacts SMC.
After contacting the MC, the mold was clamped at a speed of 1 mm / sec until the mold was closed, the upper mold (1) was clamped, and pressure molding was performed at a pressure of 70 kg / cm ² for 240 seconds. Then, the upper mold (1) was opened and the mold was removed to obtain a decorative molded article of the waterproof pan (11). This molding 1
Repeated 0 times to obtain 10 molded products. The decorative part of the waterproof pan (11) has a convex part (1) corresponding to the concave part (5) on the upper surface of the lower mold (2).
2) was formed in parallel.

(Examples 2 to 6) Example 1 was repeated except that the decorative sheet (3) shown in the following table was used and the shut-off speed up to the shut-off after contact with SMC was changed to the value shown in the following table.
Molding was performed in the same manner as in.

(Examples 7 to 8) On the decorative sheet, SM
Thirteen sheets of C cut into a size of 45 cm × 55 cm were placed on the decorative sheet at a position of 12.5 cm from the long side / notch side and 22.5 cm from the short side. In the non-decorated part, 12 pieces of SMC cut into a size of 50 cm × 50 cm are placed in the center, and the dead speed until the dead is cut after the movable upper die (1) contacts the SMC. Molding was performed in the same manner as in Example 1 except that the rate was changed to 3 mm / sec.

(Comparative Examples 1 to 4) A decorative sheet of 80 cm ×
Cut to 90 cm, SMC 90 cm larger than this
SMC cut to 100 cm and cover the decorative sheet
Molding was performed in the same manner as in Example 1 except that the layers were stacked.

(Comparative Examples 5 to 6) Molding was carried out in the same manner as in Example 1 except that the dead speeds until the dead ends after the movable upper dies contacted the decorative sheet and SMC, respectively, were changed to the values shown in the table below. Was done.

5. Evaluation Method In each of the above-described Examples and Comparative Examples, the molded articles obtained were visually evaluated for the presence of the resin component of SMC and the occurrence of breakage of the decorative sheet. The results obtained are shown in Tables 1 and 2.
It was shown to.

In these tables, the area ratio (%) indicates the area ratio with respect to the decorative sheet, and the deadline speed (mm / sec)
Indicates the deadline speed from the contact of the movable die with the SMC to the deadline.

[0085]

[Table 1]

[Table 2] As is clear from the results of Table 1 and Table 2 above, in each of the examples of the present invention, there were almost no defects,
In the comparative example, the defective rate was high.

[0086]

The method for producing a decorative molded article according to the present invention comprises:
Since it is configured as described above, when molding a decorative sheet laminated molded product having a design such as a free pattern, color, etc., the resin component of the thermosetting molding material between the decorative sheet and the mold is Inflow is less likely to occur, molding defects can be significantly reduced, and decorative molded products can be efficiently produced.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a waterproof pan manufactured by the method of the present invention.

FIG. 2 is a schematic vertical sectional view of an apparatus for carrying out the method of the present invention, showing a state before molding by a mold.

[Explanation of symbols]

 1: Movable type (upper type) 2: Fixed type (lower type) 3: Decorative sheet 4: Molding material (SMC) 5: Recessed part 6: Guide pin 7: Guide hole 11: Waterproof pan (molded product) 12: Pattern (Convex part) 13: Trap

Claims (1)

[Claims] 1. A heat compression molding is performed with a decorative sheet interposed between one of a fixed mold and a movable mold and a thermosetting molding material that abuts the other mold. Thus, in the method for producing a decorative molded article, the size of the thermosetting molding material that comes into contact with the decorative sheet among the thermosetting molding materials is made smaller than the size of the decorative sheet, and the movable mold is The cut-off speed of the movable mold from the time of contact with the thermosetting molding material or the decorative sheet until the cut-off,
The method for producing a decorated molded article, characterized in that the rate is 0.05 to 8 mm / sec.