JP2000351351A - Skin integral interior automotive trim part and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin integral interior automotive trim part and manufacturing method thereof to improve design properties by applying a skin pattern and a stitch, provide a skin caused to have a touch feeling with a soft feeling, prevent an uneven surface from being formed on a surface, be decreased in weight, and reduce cost through elimination of a manufacturing process. SOLUTION: A skin integral interior automotive trim part manufactured by a manufacturing method only comprising a step wherein a core 5 is set on a top mold 7 for molding; a step wherein liquid urethane 12 is thereafter applied or sprayed against the surface of a bottom mold 8 for molding; a step wherein immediately after applying and spraying liquid urethane, the top mold 7 for molding is closed relative to the bottom mold 8 for molding, and further the liquid urethane 12 is cured to form a skin 4 which is adhered to the core 5 for integral formation; and a step wherein an integrally formed molded product 11 with a skin is taken out from a molding tool.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded product with a skin comprising a laminate of a skin and a core material, and a method for producing the same. The present invention relates to a skin-integrated automobile interior part whose cost can be reduced and the weight is further reduced, and a method of manufacturing the same.

[0002]

2. Description of the Related Art As a method of manufacturing a resin molded body such as an instrument panel, a door trim, a console box, etc., which is an interior part of an automobile, a resin blend of vinyl chloride and ABS resin is extruded into a sheet shape, and then etched by a drawing roll. A pattern is formed, and a skin material formed by vacuum forming and a core material (base material) formed by injection molding or stamping are placed in a urethane foam mold, and then urethane foam is injected and integrally molded. The method was mainstream.

[0003] Conventionally, when a surface is applied to a surface of an automobile interior product, the surface forming step is roughly divided into a vacuum forming method in which a sheet-shaped surface is heated and formed, and a powder-shaped surface material is placed in a heated concave. There is a powder slash method of casting and melt molding, a spray rim method of spraying liquid skin raw material onto a mold, and curing and molding, etc.Detailedly, there are very many types depending on differences in molding methods etc., but most of them are After molding the skin, remove the mold from the skin mold once, reset it to another bonding mold to bond with the core material after demolding, and use it as an adhesive, urethane foam, etc. or directly core material to bond A bonding step of applying and injecting the resin and a mold for the bonding were required. Further, when the epidermis is removed from the mold or when the epidermis is re-set to the above-mentioned combined type, the epidermis is soft, so that the epidermis is likely to be deformed or wrinkled, so that careful attention is required.

[Problems to be solved by the invention]

[0004] Although a core material integral molding method in which a sheet-like skin is preformed in a core material forming die and then shaped by a molding pressure after the above-mentioned problems has been solved, the skin is elongated during molding. However, there has been a problem that the surface crests and stitches become shallow and the appearance quality deteriorates.

The present invention has been made to solve such problems, and it is possible to improve the design by applying a skin pattern or stitching to the skin, to eliminate the deformation and wrinkles of the skin, and to reduce the cost by eliminating the manufacturing process. It is another object of the present invention to provide a lighter skin-integrated automobile interior part and a method of manufacturing the same.

[0006]

That is, according to the first aspect of the present invention, there is provided an automobile interior part, wherein the automobile interior part is a skin-integrated automobile interior part comprising a laminate of only a skin and a core material.

[0007] According to the first aspect of the present invention, the weight of the automobile interior part can be reduced by forming the automobile interior part as a skin-integrated automobile interior part composed of a laminate of only the skin and the core material.

[0008] In a second aspect of the present invention, there is provided an automobile interior part with a skin integral with the skin itself bonded to a core material.

According to the second aspect of the present invention, since the skin itself adheres to the core material, an adhesive is not required, so that the material cost can be reduced and the step of applying the adhesive can be omitted, and the cost can be reduced. Can be reduced.

[0010] In the third aspect of the present invention, the outer skin is an automobile interior part with a skin integrated with urethane. Since the skin is made of urethane, the skin also functions as an adhesive, and the skin itself adheres to the core material, thus eliminating the need for a special adhesive, thereby reducing material costs and eliminating the step of applying the adhesive. , Cost can be reduced.

According to a fourth aspect of the present invention, there is provided an automobile interior part with a skin-integrated body, wherein the urethane is a thermosetting urethane which does not foam, and a skin mark or stitch is provided on a surface of the skin. According to the invention of claim 4, the urethane forming the skin is a thermosetting urethane that does not foam,
Because it is a skin-integrated automobile interior part with a skin pattern or stitch on the surface of the skin, the thermosetting urethane that does not foam can surely make the skin pattern or stitch carved in the mold appear on the surface of the skin. it can.

[0012] In the invention according to the fifth aspect, the skin is a skin having a crest or stitch on the surface, and a surface is a non-foamed urethane resin layer and a core material is a foamed urethane foam layer. In automotive interior parts. According to the fifth aspect of the present invention, by arranging the urethane foam layer on the core material side, a soft feeling can be imparted when the surface of the skin-integrated automobile interior part is touched.

According to a sixth aspect of the present invention, there is provided a method for producing a molded article with a skin, comprising a laminate of a skin and a core material.
A step of setting the core material on the upper mold for molding, and then a step of applying or spraying liquid urethane on the surface of the lower mold for molding,
Immediately after applying or spraying the liquid urethane, the upper mold for molding is closed with respect to the lower mold for molding, and further, the step of curing the liquid urethane and bonding it to the core material as a skin, and integrating the steps, A method for manufacturing a skin-integrated automobile interior part, comprising only a step of taking out a molded body with a skin from a molding die.

According to the sixth aspect of the present invention, a step of setting a core material on the upper mold for molding, a step of applying or spraying liquid urethane on the surface of the lower mold for molding, and applying or spraying the liquid urethane. After that, closing the upper mold for molding with respect to the lower mold for molding, further curing the liquid urethane and bonding it to the core material as a skin to integrate it, and forming the integrated molded body with the skin into a molding mold Removing from the
This is a method of manufacturing a skin-integrated automobile interior part having only a skin, and there is no need to form the skin separately or to provide a bonding step between the skin and the core material. There is no need to set, the cost can be reduced by omitting the process, and no deformation or wrinkles occur on the skin.

According to a seventh aspect of the present invention, there is provided a method for producing a molded article with a skin, comprising a laminate of a skin and a core material.
After setting the core material in the upper mold, a two-part liquid urethane composed of an isocyanate and a polyol was prepared as the urethane forming the skin including the function of bonding to the core material, and the isocyanate and the polyol were mixed. After spraying a predetermined amount of liquid urethane on the lower mold for molding, further accelerates the curing of the liquid urethane, and when the liquid urethane is in a semi-cured state, closes the upper mold for molding with respect to the lower mold for molding, After further curing of the liquid urethane, after the liquid urethane is completely cured, the skin is integrated with the core material, the skin and the core material are integrated, and then the molded body with the skin is removed from the molding die. Manufacturing method.

According to the present invention, the isocyanate and the polyol are mixed as the liquid urethane, and then a predetermined amount of the liquid urethane is sprayed on the lower mold for molding, whereby the liquid drips even on the vertical surface of the lower mold for molding. The thickness of the skin can be made uniform without falling.

In the invention according to the eighth aspect, the non-foamable liquid urethane is sprayed as the liquid urethane on the lower mold, and then the foamable liquid urethane is sprayed on the non-foamable liquid urethane to form the foamable liquid urethane. When the semi-cured state is reached, the upper mold for molding is closed with respect to the lower mold for molding, and after the two types of liquid urethane are cured, the skin whose surface is a non-foamed layer and whose core material side is a foamed layer is removed. 7. After forming, the foamed layer adheres to the core material to integrate the skin and the core material, and then the molded article with the skin is taken out of the molding die.
Or the method of manufacturing a skin-integrated automobile interior part according to 7.

According to the eighth aspect of the invention, after the non-foamed liquid urethane is sprayed on the lower mold, the foamable liquid urethane is sprayed on the non-foamed liquid urethane to cure the two types of liquid urethane. Since the back surface forms a skin with a non-foamed layer and the core side is a foamed layer, the surface of the skin can surely appear in the form of a skin pattern or stitch, and the interior of the core side is foamed, so the interior of the automobile The skin becomes soft when you touch the surface of the part.

[0019]

FIG. 1 is a perspective view of the entire outer appearance of an instrument panel for a vehicle, which is one of the above-mentioned skin-integrated automobile interior parts, FIG. 2 is a sectional view taken along line XX of FIG. 1, and FIG. FIG. FIG. 4 is a sectional view taken along line XX of another embodiment of FIG. 1, and FIG. 5 is an enlarged view of a portion B in FIG. According to this, the instrument panel 1 includes the software section 2
And a hard part 3. In the soft part, a surface 4 having a crested pattern is coated on the surface, and a core material 5 made of synthetic resin is laminated on the back. In another embodiment shown in FIG. 4, a composite skin 10 composed of two layers, an outer layer 10a and an inner layer 10b, covers the front surface, and a core material 5 made of a synthetic resin is laminated on the back surface. On the other hand, the hard part 3 is composed of only the core material 5.

In the method for producing a molded body using the above-mentioned skin 4, a core material 5 separately molded is fixed to an upper mold for molding as shown in FIG. The core material is fixed to the mold side with a hook or the like.

A two-part urethane adhesive composed of a polyol and a diisocyanate compound is mixed and stirred at a predetermined ratio as a material that forms the skin 4 and also functions as an adhesive with the core material. The molded product 11 is obtained by casting, bonding the upper and lower dies together, and bonding and integrating. As a method for injecting the two-part adhesive, there is a method using a RIM casting machine, but it is preferable to apply the two parts by spraying from the viewpoint of applying the adhesive thinly and uniformly.

The material of the skin 4 is a thermosetting urethane elastomer which does not foam. Further, the outer layer 10a of the composite skin 10 shown in FIGS. 4 and 5 is made of a thermosetting urethane elastomer which does not foam, and the inner layer 10b is made of urethane foam. Forms are used.

FIG. 7 shows the surface of the epidermis 4 and the composite epidermis 10.
A design with a leather pattern as shown in FIG. 7A and a design with a dimple pattern as shown in FIG. 7B are formed.

When the composite skin 10 is used as the skin, a two-pack type liquid urethane consisting of a polyol and a diisocyanate compound is first formed into a lower mold 8 for forming a two-pack type thermosetting urethane elastomer comprising a polyol and a diisocyanate compound. And a two-part liquid urethane comprising a polyol and a diisocyanate compound forming a urethane foam is spray-coated on the spray layer.

The core material 5 to be used is preferably a urethane resin injection-molded in a predetermined shape in advance. The bonding surface of the core material 5 is subjected to a flame treatment, a corona discharge treatment, a plasma discharge treatment, or an adhesive for the urethane resin. By doing so, it is possible to firmly join.

In order to obtain a molded product having a soft feeling, there is a method of foaming urethane on the core material side as described above.
A foaming agent is added to the polyol and the diisocyanate compound, or water is added to cause foaming at the same time as the curing reaction to form foamed urethane. Preferably, a gas is added to the polyol in advance and a high pressure is applied to the gas-containing polyol from the outside, and then the gas-containing polyol is mixed with the isocyanate and simultaneously released to the atmospheric pressure, whereby the foaming reaction occurs simultaneously with the urethanization reaction, so that it is ensured. Urethane foam can be formed. As the gas contained in the polyol, it is preferable to use carbon dioxide which is well soluble in the polyol.

As a method of foaming the adhesive, a low-boiling solvent having a boiling point of 40 ° C. or less, such as n-pentane, isopentane, or neopentane, is previously mixed in the polyol, and the isocyanate and the polyol react. Foaming can also be carried out by utilizing the fact that the low boiling point solvent is vaporized by the heat of reaction from the urethane reaction.

As a method of applying these adhesives,
As shown in FIG. 6B, a spray casting machine is used, and a spray gun 9 capable of two-liquid collision mixing is connected to a high-pressure casting machine for use. One tank (not shown) is filled with a polyol containing a gas or a low-boiling solvent, and the other tank is filled with isocyanate. The two liquids are allowed to collide with each other to simultaneously perform the urethanization reaction and foaming.

The discharge speed of the spray urethane in which the two liquids are mixed is 2 to 6 kg / m in order to apply uniformly in a short time.
in, preferably 3-5 kg / min. here,
If the discharge speed is lower than 2 kg / min, the coating cannot be performed in a short time. On the other hand, when the discharge speed is higher than 6 kg / min, the discharge amount discharged at one time becomes too large, and there is a problem that the adhesive on the vertical surface flows down and the entire surface of the skin cannot be uniformly coated. The discharge pressure from each tank is preferably high to improve the mixing property, and is preferably 100 to 200 kg / cm ² , and more preferably 130 to 180 kg / cm ² . If the discharge pressure is lower than 100 kg / cm ² , the mixing property is poor and unreacted portions appear. On the other hand, the discharge pressure is 200 kg / cm
If it is larger than ^2, it is necessary to increase the capacity of the high-pressure casting machine, and the equipment becomes large.

Further, the surface to be sprayed is intended to secure the wettability without intentionally accelerating the urethane resinification reaction at room temperature, and the opposite surface is at 40 to 60 ° C. for accelerating the urethane curing after bonding.
Temperature. Here, if the temperature of the spray surface is lower than 40 ° C., the curing of the urethane becomes difficult to proceed. On the other hand, when the temperature of the spray surface is higher than 60 ° C., the curing of the urethane is promoted too much, and the wettability cannot be secured.

FIG. 6 shows the spray urethane.
As shown in FIG. 2B, the lower mold 8 is thinly and continuously applied many times.
5 to 15 successive overcoatings are preferred.

After applying urethane spray as an adhesive, the upper mold 7 and the lower mold 8 are closed and cured. (FIG. 6 (c))
Then, the upper and lower molds adjusted to a certain temperature are fixed together and cured for a certain time, and then the upper and lower molds are opened as shown in FIG. 6 (d), and the molded body 11 is taken out. The production of integrated automobile interior parts was performed.

As the urethane elastomer used for the skin, isocyanates such as 1,4
-Aliphatic diisocyanates such as tetramethylene diisocyanate, 1,6 hexamethylene diisocyanate, lysine diisocyanate, isophorone diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated 4,4'-
It is possible to use an alicyclic diisocyanate such as diphenylmethane diisocyanate or an aromatic diisocyanate such as xylene diisocyanate, tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, tolidine diisocyanate, p-phenylene diisocyanate, and 1,5-naphthylene diisocyanate. it can.

On the other hand, as the polyol used for the urethane elastomer, a polyether polyol or a polyester polyol is used. It is preferable to use a polyether polyol from the viewpoint of not hydrolyzing, but a polyester polyol can be used when a hydrolysis inhibitor is added.

As the above-mentioned polyether polyol, a polypropylene glycol-based polyol, an ethylene oxide-modified product, an amine-modified product thereof, and polyoxytetramethylene glycol can be used.

On the other hand, as the polyester polyol,
Dicarboxylic acids such as adipic acid, isophthalic acid, terephthalic acid and ethylene glycol, propylene glycol,
Diethylene glycol, butylene glycol, 1,6-
Condensation reaction products with polyols such as hexanediol, trimethylolpropane, and neopentyl glycol, polycaprolactone polyols, and polycarbonate polyols can be used. It is preferable to add a hydrolysis inhibitor to these polyester polyols.

When a urethane elastomer layer which does not foam on the surface as a skin and a foamed urethane foam layer is formed on the core material side as described above, the urethane elastomer layer is formed of a solid having a thickness of 0.3 to 1.0 mm. Outer layer is formed. Subsequently, the composition used for the inner layer 4b is dropped on the outer layer and sprayed, and the mold is closed and cured to form an inner layer of a foamed layer having a thickness of 0.6 to 3.0 mm.

Here, foaming is suppressed using a metal catalyst such as dibutyltin dilaurate in the urethane elastomer layer, and bis-2-dimethylaminoethyl ether, pentamethyldiethylenetriamine, tetramethylhexamethylene is used in the urethane foam layer. The foaming is promoted by using an amine catalyst such as The above-mentioned metal catalyst and amine catalyst are previously mixed in a tank on the polyol side.

The core material 5 used is hard vinyl chloride, ABS
A resin, a hard urethane resin, an olefin-based resin, or the like is used, and it is preferable that a hard urethane resin, which is the same type of material as the skin, is injection-molded into a predetermined shape in advance and used. In addition, the bonding surface of the core material can be firmly joined by applying a flame treatment, a corona discharge treatment, a plasma discharge treatment, or an adhesive for urethane resin.

As the foaming agent used only for the inner layer 10b, a chemical foaming agent composed of azo dicarbonamide, dinitrosopentamethylenetetramine, 4,4'-oxybisbenzenebenzenesulfonylhydrazine, etc. It is one to which hollow beads such as a balloon are added. Specifically, the chemical blowing agent is preferably mixed in advance into the polyol tank.

The amount of the foaming agent to be added is 0.1 to 8 parts by weight, preferably 0.5 to 4.0 parts by weight, based on 100 parts by weight of the total of the isocyanate and the polyol forming the urethane. If the amount is less than 0.1 part by weight, the foaming effect is small, while if it exceeds 8 parts by weight, the foam cells become coarse.

[0042]

Next, the present invention will be described in more detail with reference to specific examples. Example 1 A 160 mm x 160 mm x 3.0 mm hard urethane plate with an adhesive surface preliminarily flame-treated was set in an aluminum upper and lower mold having a space of 200 mm x 200 mm x 7 mm as a core material.

The spray casting machine PSM70 (IS
Rim Spray SX-350
(Manufactured by Mitsui Chemicals, Inc.) was applied. Adhesive 1 shown in Table 1 was used as the adhesive for forming the skin. The above rim spray S
X-350 was MDI (diphenylmethane diisocyanate) as the isocyanate of the liquid A and PTMG (polytetramethylene ether glycol) as the polyol of the liquid B. Further, the solution B contains dibutyltin dilaurate TN which is a metal-based catalyst with respect to the polyol 100.
-12 (manufactured by Sakai Chemical Co., Ltd.) was added in an amount of 0.3 part by weight to prepare a B mixed solution.

The solution A and the mixture B were stored in separate tanks, and the temperature was adjusted to 70 ° C. Then, the discharge pressure is set to 150 kg / cm ² for both the liquid A and liquid B tanks, and the liquid A and liquid B are collided and mixed to obtain the adhesive 1. The lower die of the bonding type is discharged at a discharge rate of about 920 g at a rate of 50 g / sec. About 15 to prevent sagging
One thin coat was applied and sprayed for 18 seconds. At the same time as the end of the spraying, the upper and lower molds adjusted to 60 ° C. are joined together, pressed with the core material at about 2 kg / cm ² , fixed with a hook, and cured for 4 minutes from the start of spraying. Was taken out.

The above molding cycle time was 5 minutes and 30 seconds. Table 2 shows the time required for each process.

The urethane layer of this molded product had an average of 1.2 mm.
The spray urethane layer absorbs irregularities on the back surface of the outer skin with the thickness, and the product surface is smooth and the crests of 85-85 are engraved on the lower mold.
The surface quality of which 95% was transferred was good. Since there was no demolding and resetting of the epidermis, problems such as sagging of the shape and wrinkles did not occur. As a result of the 180 ° peel test, the adhesive strength between the skin and the core material was 18.4 N / 25 mm, 80 at room temperature.
It was 6.9 N / 25 mm in an atmosphere of ° C, satisfying the product performance.

Example 2 The same core material as in Example 1 was prepared as a core material, and was set in the same mold as in Example 1 after the surface of the bonded core material was subjected to a flame treatment in advance.

Then, the spray casting machine PSM70 (IS
Rim Spray SX-350
(Manufactured by Mitsui Chemicals, Inc.) was applied. Adhesives 1 and 2 in Table 1 were used as the adhesive for forming the skin. The liquid A and the liquid B were prepared in the same manner as in Example 1, but as the liquid C, 0.8 parts by weight of water was added to the polyol 100 and foamed to 0.5 g / cm ³ by the reaction with the liquid A. C mixture. Further, a tank was prepared by adding 0.8 parts by weight of etheramine, which is an amine catalyst, to 100 parts of the polyol in the C mixed solution.

The solution A, the mixed solution B and the mixed solution C were stored in separate tanks, and the temperature was adjusted to 70 ° C. Thereafter, the discharge pressure was increased to 150 k for both the A liquid, B mixed liquid, and C mixed liquid tanks.
The mixed liquid A and the mixed liquid B as the adhesive 1 were subjected to collision mixing at g / cm ² , and a discharge amount of 50 g / sec was applied to the lower mold of the bonding type.
c, about 500 g, applied thinly about 15 times to prevent sagging, and sprayed for 18 seconds. Next, the liquid A and the mixed liquid C are mixed by collision with each other as the adhesive 2 from above, and the ejection amount is set to 50.
g / sec, about 920 g, was applied thinly about 10 times to prevent sagging, and sprayed for 10 seconds. Combine the upper and lower molds that have been adjusted to 60 ° C at the same time as the end of spraying, and add 2k to the core material.
After press-bonding at g / cm ² , the mixture was fixed with a hook and cured for 4 minutes and 10 seconds from the start of spraying.

The above molding cycle time was 5 minutes and 40 seconds. Table 1 shows the time required for each step.

The urethane layer of this molded product had an average of 2.4 mm.
The spray urethane layer absorbed irregularities on the surface of the skin with the thickness, and the product surface was smooth and good. The weight is 4100
It was lighter compared to 4500 g / m ² of a conventional molded body mass becomes g / m ^2. The surface hardness is 65 for Shore A.
°, and the conventional injection integral molding is about 70 °
But it was soft.

Conventional Example As a conventional example, a skin made of a urethane elastomer was produced by a known slush molding, and the skin was set in the same lower mold as in Examples 1 and 2. Furthermore, the same core material as in Example 1 was prepared as a core material in the upper mold for molding, and the adhesive surface was set after a flame treatment in advance. Next, a spray casting machine PSM70 (ISOT) was used as an adhesive for bonding the skin and the core material.
Using HERM), rim spray SX-350 (Mitsui Chemicals) was applied. Adhesive 2 in Table 1 was used as a compounding agent. Then, the solution A and the mixed solution C are subjected to collision mixing to form an adhesive 2, and a discharge amount of 17 g / sec.
Sprayed at 0 g for 50 seconds. 6 at the end of spraying
Align the upper and lower molds controlled at 0 ° C and fix with hooks.
After curing for 5 minutes, the upper and lower molds were opened and the molded body was taken out. After that, it was cured for 10 hours.

The above molding cycle time was 7 minutes, and it was necessary to leave at room temperature for 10 hours in order to further cure the product. Table 2 shows the time required for each step.

[0054]

[Table 1]

[0055]

[Table 2]

[0056]

As described above, according to the first aspect of the present invention, the weight of the automobile interior part is reduced by forming the automobile interior part as a skin-integrated automobile interior part composed of a laminate of only the skin and the core material. There is an effect that can be.

According to the second aspect of the present invention, since the skin itself adheres to the core material, no adhesive is required, and the material cost can be reduced and the step of applying the adhesive can be omitted, and the cost can be reduced. This has the effect that it can be reduced.

According to the third aspect of the present invention, since the skin is made of urethane, the skin also functions as an adhesive, and the skin itself adheres to the core material, so that no special adhesive is required, and material costs are reduced. There is an effect that the reduction and the step of applying the adhesive can be omitted, and the cost can be reduced.

According to the fourth aspect of the present invention, since the urethane forming the skin is a thermosetting urethane that does not foam, and the surface of the skin is a skin-integrated automobile interior part having a grain or stitch on the surface, The thermosetting urethane, which does not foam, has an effect that the crest pattern or stitch carved in the mold can be surely made to appear on the surface of the epidermis.

According to the fifth aspect of the present invention, by arranging the urethane foam layer on the core material side, there is an effect that a soft feeling can be imparted when the surface of the automobile-integrated interior part is touched.

According to the sixth aspect of the present invention, a step of setting a core material on the upper mold for molding, a step of applying or spraying liquid urethane on the surface of the lower mold for molding, and a step of applying or spraying the liquid urethane. Immediately after closing the upper mold for molding with respect to the lower mold for molding, further curing the liquid urethane and bonding it to a core material as a skin to integrate them,
It is a method of manufacturing a skin-integrated automobile interior part having only a step of taking out an integrated molded body with a skin from a molding die, and there is no need to separately form a skin or to provide a bonding step between a skin and a core material. Further, there is no need to remove the molded skin once and reset it to the above-mentioned combined mold, thereby reducing the cost by omitting the steps and having the effect of preventing the skin from being deformed or wrinkled.

According to the seventh aspect of the present invention, after mixing isocyanate and polyol as liquid urethane, a predetermined amount of liquid urethane is sprayed on the lower mold for molding, so that the liquid drips on the vertical surface of the lower mold for molding. There is an effect that the thickness of the skin can be made uniform without falling.

According to the eighth aspect of the invention, after the non-foamable liquid urethane is sprayed on the lower mold, the foamable liquid urethane is sprayed on the non-foamable liquid urethane to cure the two types of liquid urethane. Since the back surface forms a skin with a non-foamed layer and the core material side is a foamed layer, the surface of the skin can surely appear as a crest or stitch, and the car surface is foamed on the core material side. There is an effect that the skin has a soft feeling when touching the surface of the interior part.

[Brief description of the drawings]

FIG. 1 is an overall external perspective view of an automotive instrument panel according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an enlarged view of a portion A in FIG. 2;

FIG. 4 is a sectional view taken along line XX of another embodiment of FIG. 1;

FIG. 5 is an enlarged view of a portion B in FIG. 4;

FIG. 6 is a schematic view showing a manufacturing process of the present invention.

FIG. 7 is a diagram showing a crest pattern of a skin according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument panel 2 Soft part 3 Hard part 4 Skin 5 Core material 7 Upper mold for molding 8 Lower mold for molding 9 Spray gun 10 Composite skin 10a outer layer 10b inner layer 11 Molded body 12 Liquid urethane

Continued on front page F-term (reference) 3D023 BA01 BB08 BB25 BC00 BD03 BD29 BE04 BE06 BE31 3D054 AA14 BB08 4F100 AK51A AK51B AR00A AT00B BA02 CA01B CA01H CA02A CA02B CA02H DJ01B EH46 EH61 EJ20 GB33 JB03 HB06

Claims (8)

[Claims] 1. An automobile interior part comprising a skin and a core material, wherein the automobile interior part comprises a laminate of only a skin and a core material. 2. The interior part of a car integrated with a skin according to claim 1, wherein the skin itself is bonded to a core material. 3. The interior part of a vehicle with an integrated skin according to claim 2, wherein said skin is made of urethane. 4. The interior part of a car with integrated skin according to claim 3, wherein the urethane is a thermosetting urethane that does not foam, and a skin mark or stitch is provided on the surface of the skin. 5. The integrated skin according to claim 3, wherein the skin is a skin having a surface pattern or stitches on the surface, a surface of the skin is a non-foamed urethane resin layer, and a core material is a foamed urethane foam layer. Automotive interior parts. 6. A method for producing a molded article with a skin comprising a laminate of a skin and a core material, comprising: setting a core material on an upper mold for molding; and thereafter applying or coating liquid urethane on the surface of the lower mold for molding. A step of spraying, and a step of closing the upper mold for molding immediately after applying or spraying the liquid urethane with respect to the lower mold for molding, further curing the liquid urethane, bonding the core with a core material as a skin, and integrating the same. And removing the integrated molded body with a skin from a molding die. 7. A method for producing a molded article with a skin comprising a laminate of a skin and a core material, wherein the urethane forms a skin having a function of bonding to the core material after setting the core material in the upper mold for molding. Is composed of isocyanate and polyol
After preparing a liquid type liquid urethane, mixing the isocyanate and the polyol, then spraying the liquid urethane on the lower mold for molding, the curing of the liquid urethane is promoted, and the molding is performed when the liquid urethane is in a semi-cured state. The upper mold is closed with respect to the lower mold, and the curing of the liquid urethane is further advanced.After the liquid urethane is completely cured, it is made into a skin, then bonded to the core material, and the skin and the core material are integrated. A method for producing a skin-integrated automobile interior part, comprising removing a molded body with a seal from a molding die. 8. A liquid urethane which does not foam as said liquid urethane is sprayed on a lower mold, and then a foamable liquid urethane is sprayed on said non-foamable liquid urethane, whereby said foamable liquid urethane is in a semi-cured state. Sometimes the upper mold for molding is closed with respect to the lower mold for molding, and
After the type of liquid urethane is cured, the surface forms a skin where the surface is a non-foamed layer and the core side is a foamed layer, and after the foamed layer is bonded to the core and the skin and the core are integrated, a molded article with a skin is formed. 8. The method for producing a skin-integrated automobile interior part according to claim 6, wherein the part is taken out of a molding die.