JP2016083874A - Method of producing interior material for automobiles with woodgraining part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an appropriate method of producing an interior material for automobiles having a woodgraining part with good appearance, which can effectively prevent appearance defect due to the attachment of a hot-melt adhesive melted in the surrounding of the woodgraining part.SOLUTION: A method of producing an interior material 1 for automobiles having a woodgraining part 6 shown in a figure 1 (e) comprises a setting step of (a) in the figure, a heating step of (b) in the figure, a bonding step of (c) in the figure, and a woodgraining step of (d) in the figure, and masking MSK is installed in an outer circumferential surface of a woodgraining groove 5 in the heating step so as to prevent a hot-melt adhesive 2 from melting by heat in the outer circumferential surface of the woodgraining groove 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method of manufacturing an interior material for an automobile having a grained portion, and in particular, for an automobile having a good-looking grained portion that can effectively prevent poor appearance due to adhesion of a hot melt adhesive melted around the grained portion. It is suitable for manufacturing the interior material.

  2. Description of the Related Art Conventionally, in an automobile interior material that decorates the inner surface (interior side surface) of an automobile door, as shown in FIG. In addition, a material in which a surface material 4 such as a cloth is bonded to a predetermined range of the surface of the base material 3 made of resin is known.

  Further, in the automobile interior material 1 in FIG. 2 (e), the skin material 4 is bonded to the surface of the base material 3 through the hot melt adhesive material 2 in order to eliminate the use of the adhesive material containing the volatile solvent. ing. The base material 3 before bonding has a grained groove 5 formed on its surface, and the skin material 4 before bonding is provided with a coating layer of the hot melt adhesive 2 on its surface. Then, the interior of the automobile shown in FIG. 2 (e) is formed by a method of pushing the end portion of the skin material 4 into the wood groove 5 of the base material 3 in a state in which the base material 3 and the skin material 4 are bonded. The material 1 has a grained portion 6 (see, for example, Patent Document 1). The automotive interior material 1 having such a grained portion 6 is conventionally manufactured through the manufacturing steps shown in FIGS. 2 (a) to 2 (d).

  That is, when manufacturing the automobile interior material 1 shown in FIG. 2 (e), first, as shown in FIG. 2 (a), the first mold M1 (upper mold) and the second mold facing the first mold M1. Using M2 (lower mold), the base material 3 is set on one surface of the opposing surfaces of the respective molds M1 and M2, and the skin material 4 is set on the other surface. After that, as shown in FIG. 2B, a heater H is inserted between the molds M1 and M2, and the base material 3 and the skin material 4 are heated by the heat of the heater H and applied to the skin material 4. The hot melt adhesive 2 is melted by the heat generated by the heating.

  After the heating, as shown in FIG. 2 (c), the hot melt melted by removing the heater H from between the two molds M1 and M and relatively bringing the two molds M1 and M2 close to each other. The base material 3 and the skin material 4 are bonded via the adhesive material 2. Then, as shown in FIG. 2 (d), before the hot melt adhesive material 2 is solidified by cooling, the end portion of the skin material 4 is placed in the wood grain groove 5 formed in the base material 3 in the wood grain bar. By pushing in B, conventionally, an automotive interior material 1 having a grained portion 6 as shown in FIG.

  However, in the manufacturing method of the automotive interior part 1 by the conventional manufacturing process shown in FIGS. 2A to 2D, the entire skin material 4 is heated by the heater H in the heating process of FIG. . For this reason, when the base material 3 and the skin material 4 are pasted together in the pasting step of FIG. 2 (c), when the edge of the skin material 4 and the outer peripheral portion of the wood grain groove 5 on the base material 3 side are in contact with each other, Since the hot melt adhesive 2 applied and melted on the end portion of the skin material 4 adheres to the outer peripheral portion of the wood grain groove 5, appearance defects due to adhesion of the melted hot melt adhesive around the wood grain part 6 Is likely to occur frequently.

Japanese Unexamined Patent Publication No. 2007-38561

  The present invention has been made to solve the above-mentioned problems, and the object thereof is to effectively prevent appearance defects due to adhesion of hot melt adhesive melted around the grained portion, and to improve the graininess. It is in providing the manufacturing method suitable for manufacturing the interior material for motor vehicles which has a part.

  In order to achieve the above object, the present invention uses a first mold and a second mold facing the first mold, and sets a base material on one surface of the opposed surfaces of each mold, After setting the skin material on the surface and setting the base material and the skin material, a heater is inserted between the first mold and the second mold, and the base is heated by the heat of the heater. A heating step of heating the material and the skin material, and melting the hot melt adhesive applied to the skin material with the heat of the heating, and after the heating, the first mold and the second mold The bonding step of bonding the base material and the skin material through the hot-melt adhesive material by removing the heater from the middle and making the both molds relatively close to each other, and the hot melt Before the adhesive is solidified by cooling, it is formed on the base material A wood graining step of obtaining an automobile interior material having a wood grain part by pushing the end of the skin material into the wood grain groove with a wood grain bar, and masking the outer peripheral part of the wood grain groove in the heating step It is characterized in that it is set so that the hot melt adhesive is not melted by the heat generated by the heating at the outer periphery of the grained groove.

  In the present invention, as described above, in the heating process, by setting the masking on the outer peripheral portion of the grained groove, the hot melt adhesive is set not to melt on the outer peripheral portion of the grained groove. For this reason, it is possible to effectively prevent appearance defects due to adhesion of the hot melt adhesive melted around the grained portion, and it is suitable for manufacturing an automotive interior material having a fine grained portion. Can be provided.

  Further, according to the present invention, since the hot melt adhesive does not melt at the outer periphery of the grained groove as described above, in the graining process, the edge of the skin material is placed in the grained groove formed on the base material. When pushing in, there is also an advantage that the end portion of the skin material can be pushed in smoothly.

FIG. 1 is a process conceptual diagram showing a method for manufacturing an automotive interior material having a grained portion according to the present invention, (a) is an explanatory diagram of a setting process in the manufacturing method, and (b) is a heating in the manufacturing method. Explanatory drawing of a process, (c) is explanatory drawing of the bonding process in the manufacturing method, (d) is explanatory drawing of the graining process in the manufacturing method, (e) is an interior part for vehicles manufactured by the manufacturing method It is sectional drawing. FIG. 2 is a process conceptual diagram showing a conventional manufacturing method of an automotive interior material having a grained portion, (a) is an explanatory diagram of a setting process in the manufacturing method, and (b) is a heating process in the manufacturing method. Explanatory drawing of (c) is explanatory drawing of the bonding process in the manufacturing method, (d) is explanatory drawing of the graining process in the manufacturing method, (e) is a cross section of the automotive interior part manufactured by the manufacturing method FIG.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a process conceptual diagram showing a method for manufacturing an automotive interior material having a grained portion according to the present invention, (a) is an explanatory diagram of a setting process in the manufacturing method, and (b) is a heating in the manufacturing method. Explanatory drawing of a process, (c) is explanatory drawing of the bonding process in the manufacturing method, (d) is explanatory drawing of the graining process in the manufacturing method, (e) is an interior part for vehicles manufactured by the manufacturing method It is sectional drawing.

  The automobile interior material 1 in FIG. 1 (f) has a structure in which a skin material 4 made of a fabric or the like is laminated and bonded to the surface of a base material 3 made of a resin via a hot melt adhesive 2. The base material 3 before bonding has a grained groove 5 formed on the surface thereof, and the skin material 4 before bonding is provided with a coating layer of the hot melt adhesive 2 on the surface thereof. Then, the interior of the automobile shown in FIG. 1 (f) is formed by a method of pushing the end of the skin material 4 into the wood groove 5 of the base material 3 in a state where the base material 3 and the skin material 4 are bonded to each other. The material 1 has a grained portion 6 formed therein.

  The automobile interior material 1 having the grained portion 6 as described above includes a setting step shown in FIG. 1A, a heating step shown in FIG. 1B, a bonding step shown in FIG. Manufactured through a graining process and a product removal process. Details of these steps are as follows.

《Set process》
1A to 1D, the first mold M1 and the second mold M2 facing the first mold M1 are used. In the setting step of FIG. 1A, one of the opposing surfaces of the molds M1 and M2 (hereinafter referred to as “opposing surface”) (in the example of FIG. 1A, the first mold M1). The base material 2 is set on the opposite surface), and the skin material 4 is set on the other surface (the opposite surface of the second mold M2 in the example of FIG. 5A).

  As specific configurations of the first mold M1 and the second mold M2 as described above, in the present embodiment, the first mold M1 is disposed above the second mold M2 with the first mold M1 as the upper mold, The mold M2 is placed below the first mold M1 as the lower mold.

  The first mold M1 (upper mold) is set as a movable mold that can be moved closer to or away from the second mold M2 (lower mold), and the second mold M2 (lower mold) ) Is fixed to the base 100 as a fixed mold that cannot be moved. The movement of the first mold M1 (upper mold) is performed using an actuator such as a hydraulic cylinder (not shown) that is well-known as lifting means.

  In the first mold M1, the base material guide 101 is located on the outer peripheral portion of the set base material 2, and the base material guide 101 prevents the base material 2 from dropping or misaligned. Further, in the second mold M2, the skin material guide 102 is positioned on the outer peripheral portion of the set skin material 4, and the skin material guide 102 prevents the skin material 4 from falling off or being displaced. The skin material guide 102 is provided so as to be vertically movable by an actuator AC1 such as a hydraulic cylinder.

《Heating process》
In the heating step of FIG. 1B, after setting the base material 2 and the skin material 4 as described above, a heater H is inserted between the first mold M1 and the second mold M2, and the heater H While heating the base material 2 and the skin material 4 with heat, the hot-melt-adhesive material 3 apply | coated to the skin material 4 is fuse | melted with the heat by the said heating.

  In this heating step, the masking MSK is provided on the outer periphery of the grained groove 5 formed in the base material 2 so that the hot melt adhesive 3 is melted by the heat generated by the heating at the outer periphery of the grained groove 5. It is set not to.

  As a specific installation method of the masking MSK, in this embodiment, the masking MSK is installed inside the skin material guide 102 via a well-known hinge J that can be expanded and folded. The masking MSK installed in this manner is deployed by falling to the outer peripheral side of the grained groove 5 with the hinge J as a base point, and is set so as to cover the outer peripheral part of the grained groove 5. The operation of defeating the masking MSK may be manual or automatic.

  As a specific method for setting the masking MSK that has fallen as described above into a standing posture as shown in FIG. 1A, in this embodiment, the skin material guide 102 is provided so as to be movable in the vertical direction. When the movable skin material guide 102 moves downward, the masking MSK is automatically pushed upward at the outer peripheral portion of the skin material 4 that rises relative to the surface. There is no limit. For example, when the skin material guide 102 moves downward, a method is adopted in which the masking MSK is pushed up by a member (for example, the second mold M2) that rises relatively in appearance as in the case of the skin material 4. You can also.

  In the heating process of FIG. 1B, as described above, a specific method of inserting the heater H between the first mold M1 and the second mold M2 and removing the heater H between the first mold M1 and the second mold M2 (see FIG. 1B). There are various conceivable methods for taking in and out the heater H). As a method for putting in and out the heater H, for example, the heater H may be put in and out by sliding a heater support means (not shown) that supports the heater H.

<< bonding process >>
In the bonding step of FIG. 1 (c), after the heating, the heater H is removed from between the first mold M1 and the second mold M2, and the molds M1 and M2 are relatively approached. Then, the base material 2 and the skin material 4 are bonded together with the molten hot-melt adhesive material 3.

  Also in the bonding step of FIG. 1 (c), when the base material 3 and the skin material 4 are bonded, the end portion of the skin material 4 and the outer peripheral portion of the grained groove 5 on the base material 3 side are the same as before. At this time, since the hot melt adhesive 2 applied to the end portion of the skin material 4 is not melted (see the << heating step >>), the hot melt adhesive melted as in the prior art. 2 does not adhere to the outer periphery of the grained groove 5.

  As described above, in the present embodiment, the first mold M1 (upper mold) is set as a movable mold, while the second mold M2 (lower mold) is set as a fixed mold. As described above, in the present embodiment, the first mold M1 (upper mold) is moved upward as a specific method for relatively bringing both molds M1 and M2 closer to each other.

《Graining process》
In the graining process, before the hot melt adhesive 3 melted by heating is solidified by cooling, the end of the skin material 4 is pushed into the graining groove 5 formed in the base material 3 by the graining bar B. Thus, an automotive interior material 1 having a grained portion 6 is obtained.

  By the way, as described above, the hot melt adhesive 3 does not melt at the outer periphery of the graining groove 5, so when the end of the skin material 4 is pushed into the graining groove 5 with the graining bar B, it is pushed smoothly. Can be included.

  The wood grain bar B is located on the outer periphery of the second mold (lower mold) M2, and is provided so as to be vertically movable toward the wood grain groove 5 of the base material 3 by an actuator AC2 such as a hydraulic cylinder. The pressing of the skin material 4 into the grained groove 5 by B (the grained construction method) is performed by the upward movement of the grained bar B.

<Product removal process>
Although not shown in the drawings, in this product take-out process, the wood mold bar B that has been moved upward in the above-described << wood graining process >> is moved downward, and the first mold relatively moved closer in the above-mentioned << bonding process >>. By moving the M1 (upper mold) and the second mold M2 (lower mold) relatively far apart, the final product, that is, the automobile interior material 1 having the grained portion 6 is taken out between the two molds M1 and M2.

  In the manufacturing method of the automotive interior material 1 having the grained portion 6 described above, the outer periphery of the grained groove 5 is provided by installing the masking MSK on the outer circumferential portion of the grained groove 5 in the << heating step >> as described above. The hot melt adhesive material 2 was set not to melt at the part. For this reason, it is possible to effectively prevent the appearance defect due to the adhesion of the hot melt adhesive 2 melted around the grained portion 6, and it is possible to obtain the automotive interior material 1 having the grained portion 6 having a good appearance.

  The present invention is not limited to the embodiments described above, and many modifications can be made by those having ordinary knowledge in the art within the technical idea of the present invention. For example, as another embodiment of the present invention, a configuration in which the first mold M1 described above is a lower mold and the second mold M2 is an upper mold may be employed.

DESCRIPTION OF SYMBOLS 1 Automotive interior material 2 Hot melt adhesive material 3 Base material 4 Skin material 5 Grain groove 6 Grain part 100 Base 101 Base material guide 102 Skin material guide B Wood grain bar J Hinge H Heater MSK Masking M1 1st type | mold M2 2nd Type

Claims (1)

A setting step of using a first mold and a second mold facing the first mold, setting a base material on one surface of the facing surfaces of each mold, and setting a skin material on the other surface;
After setting the base material and the skin material, a heater is inserted between the first mold and the second mold, and the base material and the skin material are heated by the heat of the heater, and the skin A heating step of melting the hot melt adhesive applied to the material with heat by the heating,
After the heating, the heater is removed from between the first mold and the second mold, and the two molds are moved relatively close to each other through the molten hot melt adhesive. A pasting step for pasting the skin material;
Before the hot melt adhesive is solidified by cooling, an automobile interior material having a grained portion is formed by pushing the end of the skin material into a grained groove formed in the base material with a grained bar. And obtaining a graining process,
In the heating step, by setting masking on the outer periphery of the wood groove, the hot melt adhesive is set not to be melted by heat due to the heating at the outer periphery of the wood groove. The manufacturing method of the interior material for motor vehicles which has.

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