JP2012066507A - Interior material and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase adhesive force between the first molding article and the second one in their ditch parts and also to improve their appearance.SOLUTION: The present invention relates to a manufacturing method of a door trim 10 equipped with an ornament substrate 28 and a door trim substrate 24 comprising a material prepared by the same with or different from the ornament substrate 28 material having a different color from the same, with a groove 22 formed along a joint 40 of the ornament substrate 28 and the door trim substrate 24, comprising the following process steps: a step in which an ornament substrate 28 is molded, a bottom die 52 in molding dies for molding the door trim substrate 24 is placed on the ornament substrate 28, a pressing part 54 equipped in an upper die 50 is pressed to a flange part 32 so as to seal an inner part in a molding space S and at the same time to place an enlarging part 34 on the molding space S, followed by closing the molding dies; and a step in which a joint 40 is molded by covering the enlarging part 34 with a covering part 38 by introducing a resin in a removing route in a case where the enlarging part 34 is removed from the second molding article.

Description

  The present invention relates to a method for manufacturing an interior material and an interior material.

  Conventionally, as an interior material configured by including a first molded product and a second molded product made of a different material or the same material and having a different color, the first molded product is disclosed in Patent Document 1 below, for example. The ones described are known. In this interior material, the first molded product and the second molded product are joined at the groove. The groove is a parting groove for improving the appearance of the interior material, for example, by accommodating the end of the skin material adhered to the surface of the interior material.

Japanese Patent No. 4107583

  However, in the above interior material, since the first molded product and the second molded product are merely joined in a surface contact state at the boundary portion, sufficient joining strength cannot be obtained at this joining surface. Therefore, for example, when bending stress is applied to the interior material, the stress concentrates in the groove portion which is the fragile portion, and the first molded product and the second molded product may be broken at the joint surface.

  This invention is completed based on the above situations, Comprising: It aims at improving the joining strength of the 1st molded product and 2nd molded product in a groove part, and improving the external appearance.

  The present invention includes a first molded product and a second molded product made of a different material or the same type of material and having a different color, and the first molded product and the second molded product. A groove portion is formed along the connecting portion, a standing wall portion constituting the side wall of the groove portion is continuously provided on the peripheral edge of the first molded product, and a flange portion constituting the rear wall of the groove portion is continuously provided on the standing wall portion. A method of manufacturing an interior material in which an extension part formed by extending a part of the interior material is intermittently formed, wherein a first molded product is molded and a second molded product is molded into one of the molds Place the first molded product and press the pressing part provided on the other mold against the flange part to seal the inside of the molding space of the second molded product and position the extension part in the molding space. When the mold is closed and the extension part is detached from the second molded product, the resin is caused to wrap around the separation path. Characterized in place of forming the connecting portion by covering the extended portion in the cover portion.

  If it does in this way, since resin is made to wrap around on the separation path of an extension part, the joint strength of the 1st molded product and the 2nd molded product in a slot can be improved. Moreover, the appearance appearance of the interior material can be improved by positioning the joint portion between the first molded product and the second molded product at the back of the groove portion. For this reason, a 1st molded product and a 2nd molded product can be joined firmly, without impairing design nature.

As an embodiment of the present invention, the following may be adopted.
The extension portion has a through hole, and the resin may be wound around the separation path by filling the inside of the through hole with resin.
If it does in this way, since an extension part can be hooked and fixed with resin with which the inside of a penetration hole was filled, the joint strength of the 1st molded product and the 2nd molded product can further be improved.

  The present invention also includes a first molded product and a second molded product made of a different material or the same type of material and having a different color, the first molded product and the second molded product. A groove portion is formed along the connecting portion, and a standing wall portion constituting the side wall of the groove portion is continuously provided on the peripheral edge of the first molded product, and a flange portion constituting the back wall of the groove portion is continuously provided on the standing wall portion, It is an interior material in which a plate-like extension part formed by extending a part of the flange part is formed intermittently, and the connecting part is an extension part and the extension part is separated from the second molded product It is good also as a structure which consists of a cover part which makes resin wrap around on a detachment path | route and covers an extension part.

  According to such a configuration, for example, even when bending stress is applied to the interior material and the stress is concentrated in the groove portion, the extension portion is covered and held by the cover portion, so the first molded product and It can avoid that a 2nd molded product fractures | ruptures in a groove part. Moreover, since the junction part of a 1st molded product and a 2nd molded product can be located in the back of a groove part, the external appearance appearance of an interior material can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, the joint strength of the 1st molded product and 2nd molded product in a groove part can be improved, and an external appearance can be improved.

The perspective view which shows the door trim in Embodiment 1. FIG. AA line sectional view in FIG. Perspective view of the extension viewed obliquely from above Sectional view showing the mold closed Sectional drawing which showed the state which inject | poured resin into the molding space from the state of FIG. 4, and shape | molded the door trim base material Sectional drawing which showed the state which opened the shaping | molding die from the state of FIG. 5, and removed the interior material It is sectional drawing of the door trim in Embodiment 2, Comprising: Sectional drawing corresponding to FIG.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to the drawings of FIGS. In this embodiment, the door trim 10 attached to a vehicle door is illustrated as an interior material. FIG. 1 is a perspective view of a door trim 10 of the present embodiment. As shown in FIG. 1, the door trim 10 includes a door trim main body 12 and an armrest 20 formed in a plate shape with a synthetic resin or the like. The armrest 20 is formed of a synthetic resin or the like, and is arranged so as to project to the vehicle interior side of the door trim body 12. The door trim 10 includes an ornament 14, a speaker grill 16, a door pocket 18, and the like. At the boundary between the door trim main body 12 and the ornament 14, a groove portion 22 is recessed over the entire circumference.

  FIG. 2 is a cross-sectional view taken along the line AA in FIG. The door trim main body 12 includes a door trim base material 24, and a texture pattern is formed on the surface of the door trim base material 24. On the other hand, the ornament 14 includes an ornament base material 28, and a texture pattern is also formed on the surface of the ornament base material 28.

  The door trim base material 24 and the ornament base material 28 are made of resins made of different materials or the same kind of materials and having different colors. Therefore, even if the door trim base material 24 and the ornament base material 28 are joined in a surface contact state at the boundary portion, sufficient joining strength cannot be ensured at the joining surfaces of the base materials 24 and 28. As a countermeasure, a connecting portion 40 that connects the door trim base material 24 and the ornament base material 28 is provided.

  The connecting portion 40 is disposed adjacent to the groove portion 22 and extends in the circumferential direction of the ornament base material 28 along the groove portion 22. The connecting portion 40 includes a flat extension portion 34 provided on the ornament base material 28 and a rib-like cover portion 38 provided on the door trim base material 24, and the extension portion 34 is a cover portion. The extension portion 34 is held in the cover portion 38 so as not to be detached. Thereby, the door trim base material 24 and the ornament base material 28 are joined at the connecting portion 40.

  The side wall of the groove portion 22 is composed of a side wall on the ornament base material 28 side and a side wall on the door trim base material 24 side. A standing wall portion 30 is continuously provided at the periphery of the ornament base material 28, and the standing wall portion 30 constitutes a side wall on the side of the ornament base material 28 in the groove portion 22. The standing wall portion 30 is disposed substantially at right angles to the plane direction of the ornament base material 28. A flange portion 32 is connected to the end edge (lower end edge in the drawing) of the standing wall portion 30. The flange portion 32 is disposed substantially parallel to the planar direction of the ornament base material 28. Further, the flange portion 32 constitutes the bottom portion of the groove portion 22.

  As shown in FIG. 3, both the standing wall portion 30 and the flange portion 32 are extended in the circumferential direction of the ornament base material 28 along the extending direction of the groove portion 22. The above-described extension portion 34 is configured such that a part of the flange portion 32 is extended in the planar direction at the end edge of the flange portion 32. For this reason, the extension part 34 is disposed substantially parallel to the planar direction of the ornament base material 28. Further, a through hole 36 is formed in the extension portion 34. The outer shape on the distal end side of the extension 34 has an arc shape and is formed along the hole shape of the through hole 36. A plurality of extension portions 34 are formed intermittently at equal intervals along the extending direction of the groove portion 22.

  A cover portion 38 formed by embedding the extension portion 34 is provided on the periphery of the door trim base material 24. That is, the cover 38 constitutes a side wall of the groove 22 on the door trim base material 24 side. Accordingly, the connecting portion 40 including the extension portion 34 and the cover portion 38 constitutes a part of the groove portion 22 and extends in the circumferential direction of the ornament base material 28 along the groove portion 22.

  The inside of the through hole 36 of the extension portion 34 is filled with a resin constituting the cover portion 38. For this reason, even if the extension portion 34 is pulled in the direction of detachment from the cover portion 38, the resin filled in the through hole 36 is locked to the inner wall of the through hole 36, so that the detachment of the extension portion 34 is restricted. The In this way, the extension part 34 is held in a state of being prevented from being detached by the cover part 38.

  Further, a plurality of joint portions by the extension portion 34 and the cover portion 38 are provided intermittently in the circumferential direction of the ornament base material 28 along the groove portion 22. Therefore, the door trim base material 24 and the ornament base material 28 are firmly fixed over the entire circumference, and the joining strength at the connecting portion 40 between the door trim base material 24 and the ornament base material 28 can be improved. Thereby, even if it is a case where bending stress is added to the door trim 10 and stress concentrates on the groove part 22, it can prevent that the door trim 10 is fractured | ruptured by the groove part 22. FIG.

  Next, a configuration of a molding die for integrally molding the door trim base material 24 and the ornament base material 28 and a molding method thereof will be described with reference to the drawings of FIGS. As shown in FIG. 4, the forming die for forming the groove portion 22 includes an upper die 50, a lower die 52 arranged to face the lower side of the upper die 50, and the like. The upper die 50 is provided with a pressing portion 54 that presses against the flange portion 32 from above. The lower die 52 receives a flange portion 32 that is pressed downward by the pressing portion 54 from below. 56 is provided. Thereby, the flange part 32 is clamped between the pressing part 54 and the receiving part 56 in the up-down direction.

  The surface of the ornament base material 28 is pre-textured, and is placed on the lower mold 52 with the texture forming surface of the ornament base material 28 facing upward. When the mold is closed, the wrinkle pattern disappears in the portion pressed by the pressing portion 54 of the flange portion 32 where the wrinkles are formed, but the wrinkle pattern is retained in the portion not in contact with the pressing portion 54. It has come to be. Further, when the pressing portion 54 presses the flange portion 32, the inside of the molding space S for molding the door trim base material 24 is sealed.

  The molding space S is formed in a region surrounded by the upper mold 50 and the lower mold 52 in the vertical direction. Moreover, the wall surface comprised by the upper mold | type 50 among the inner walls of the shaping | molding space S is made into the wrinkle shaping | molding surface in which the wrinkle pattern was formed. In a state where the mold is closed, the extension 34 is held in a horizontal position at an intermediate position spaced from both the bottom surface and the ceiling surface of the molding space S. By injecting resin from a gate (not shown) arranged in communication with the molding space S, the resin is filled into the molding space S as shown in FIG. While the base material 24 is formed, a texture pattern is formed on the surface of the door trim base material 24.

  Next, both the upper and lower molds 50 and 52 are opened in the vertical direction, and as shown in FIG. 6, the integrally molded product 11 in which the door trim base material 24 and the ornament base material 28 are integrally molded is removed. The integrally molded product 11 formed in this way has an extension portion 34 embedded in the cover portion 38, and therefore, when stress is concentrated in the groove portion 22 due to bending stress applied to both base materials 24 and 28. Even if it exists, both the base materials 24 and 28 will not fracture | rupture in the groove part 22, but both the base materials 24 and 28 can be firmly joined by the connection part 40. FIG.

  As described above, in the present embodiment, the groove portion 22 is formed along the connecting portion 40 between the door trim base material 24 and the ornament base material 28, but the extension portion 34 is embedded in the cover portion 38 in the connecting portion 40. Therefore, the door trim base 24 and the ornament base 28 can be firmly joined. Further, since the through hole 36 is formed in the extension portion 34 and the cover portion 38 is provided in a state where the resin is embedded in the through hole 36, the door trim base material 24 and the ornament base material 28 can be more firmly joined. Furthermore, since the joint part of the extension part 34 and the cover part 38 is arrange | positioned in the back of the groove part 22, this joint part is not visually recognized from the exterior of the groove part 22, and appearance appearance can be improved.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to the drawing of FIG. In the present embodiment, the surface of the ornament base material 28 is not textured, and instead, the ornament skin material 26 is attached to the surface of the ornament base material 28. As the ornamental skin material 26, for example, a material having a cushioning property and whose surface has been subjected to graining in advance can be used. Moreover, the edge part of the ornamental skin material 26 is accommodated in the inside of the groove part 22, and the terminal of the ornamental skin material 26 is processed as a so-called grained state to improve the appearance. Furthermore, the ornament skin material 26 is adhered to the ornament base material 28 via, for example, a hot melt tape (not shown).

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Although the groove portion 22 is formed along the connecting portion 40 between the door trim body 12 and the ornament 14 in the above embodiment, according to the present invention, for example, the door trim base material is composed of a main base material and an upper base material. In addition, a groove portion may be formed along the connecting portion between the main base material and the upper base material.

  (2) Although the through hole 36 is provided in the extension part 34 in the above embodiment, according to the present invention, for example, the extension part is formed in a T shape without providing the through hole in the extension part. You may hold | maintain an extension part with respect to a cover part in the state of detachment | leave by making a resin go around.

  (3) In the above embodiment, the door trim base material 24 and the ornament base material 28 are integrally formed as an integrally molded product 11. However, according to the present invention, three or more types of base materials having different materials or the same material are used. It is good also as an integrally molded product formed by integrally molding three or more kinds of substrates having different colors.

10 ... Door trim (interior material)
22 ... groove 24 ... door trim base material (second molded product)
28 ... Ornament base material (first molded product)
DESCRIPTION OF SYMBOLS 30 ... Standing wall part 32 ... Flange part 34 ... Extension part 36 ... Through-hole 38 ... Cover part 40 ... Connection part 50 ... Upper mold | type (the other type | mold of a shaping | molding die)
52 ... Lower mold (one mold)
54 ... Holding part 56 ... Receiving part S ... Molding space

Claims (3)

A first molded article and a second molded article made of a different material or the same kind of material and having different colors, and a connecting portion between the first molded article and the second molded article A groove portion is formed along the vertical wall portion that constitutes the side wall of the groove portion, and the flange portion that constitutes the back wall of the groove portion is continuously provided to the vertical wall portion. A method for manufacturing an interior material in which an extension formed by extending a part of a flange is formed intermittently,
Forming the first molded article;
The first molded product is placed on one of the molding dies for molding the second molded product, and a pressing portion provided on the other mold is pressed against the flange portion, whereby the second molded product is molded. Sealing the inside of the molding space and positioning the extension in the molding space to close the mold;
A method of manufacturing an interior material, wherein the connecting portion is formed by covering a portion of the extension portion with a covering portion by covering the extension portion with a cover when the extension portion is separated from the second molded product. .   2. The interior material manufacturing method according to claim 1, wherein the extension portion has a through hole, and the resin is circulated on the separation path by filling the resin into the through hole. Method. A first molded product;
The first molded article includes a second molded article made of a different material or the same kind of material and having a different color,
A groove portion is formed along a connecting portion between the first molded product and the second molded product, and a standing wall portion constituting a side wall of the groove portion is continuously provided on a peripheral edge of the first molded product, and a rear wall of the groove portion. Is an interior material in which a plate-like extension formed by extending a part of the flange is intermittently formed.
The connecting portion includes the extension portion, and a cover portion that covers the extension portion by causing the resin to wrap around the separation path when the extension portion is separated from the second molded product. Wood.

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