JPH07137051A - Manufacture of integrally-molded product with skin - Google Patents

Abstract

PURPOSE:To provide a method to obtain simply and reliably a single integrally- molded product with the skin which is comprised by making use of the skin materials independent of each other without necessitating specific equipments. CONSTITUTION:A flange part 13 of one side skin material 11 is integrally formed with a recessed groove part 15, a flange part 14 of the other skin material 12 is provided with a projected lined part 16 holding a fixed polymerized condition by fitting into the recessed groove of the flange part of the one side skin material, the flange parts of each of the skin materials each are joined to each other respectively by fitting the projected part into the recessed groove so that a fixed joint line L is formed and then a resin material is introduced to a rear side of the skin material including the flange part for monolithic molding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a skin-integrated molded product.

[0002]

2. Description of the Related Art In an automobile instrument panel 60 as shown in FIG. 9, for example, a resin material is introduced together with a base material (core material) on the back surface side of a skin formed in a predetermined panel shape. Are integrally molded. By the way, as shown in the drawing, a part (for example, the lower half) 62 of the surface of the instrument panel 60 may be changed to a different color or texture from the other part (the upper half).

As a method of manufacturing such a so-called two-tone product, as shown in FIG. 10, first, as shown in FIG. 10, the entire panel is manufactured by a single skin material 63, and then the surface of the skin material to be changed is spray coated. Painted surface 6
There is a method of forming 4. Further, as shown in FIG. 11, flange portions 68, 6 are provided at the end portions of the independent skin materials 65, 66, respectively.
9, the flanges 68 and 69 are previously bent and polymerized along the joining line L of the skin material in the back surface direction and fused and fused by a high-frequency welder to form a single skin material, and then the entire panel is molded. There is also a method. Reference numeral 61 in the figure
Is a core material, and 67 is a foamed resin material.

However, in the former method, not only the manufacturing process of the product is significantly complicated, such as degreasing of the coated surface 64 and masking treatment on the unpainted surface or drying treatment after coating, but also the changed portion It is disliked that the cut-back line is flat because it is formed by the boundary of the painted surface.
On the other hand, in the latter method, since the independent skin materials 65 and 66 are bonded together, the tangent line is three-dimensionally created, but the flange portions 68 and 69 of the respective skin materials are Requires jigs and equipment and processes for fusing.

Therefore, the present applicant previously superposed the flange portions by integrally engaging the continuous bending portions and the bending portions integrally provided on the flange portions of the above-mentioned independent skin materials. After that, an integral molding method characterized by injecting a resin material and integrally molding was proposed (Japanese Patent Publication No.
7845). An example thereof is shown in FIG. In the figure, reference numerals 71 and 72 are independent skin materials, 73 and 74 are flange portions, 75 is a continuous bent portion, and 76 is a bent portion.

According to this method, independent skin materials can be coalesced and polymerized without using a special device.
However, in this method, it is difficult to join the continuous bent portion and the bent portion of the flange portion, and the joining is not reliable especially when the skin material is flexible and has low rigidity. It was pointed out that sometimes it would come off.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve such a problem and provides a single skin-integrated molded article formed by using independent skin materials.
It is intended to provide a method for easily and surely obtaining it without requiring special equipment.

[0008]

That is, the present invention is
When obtaining a single skin-integrated molded product in which a flange portion obtained by bending each independent skin material along the tangent line in the back side direction of the skin material is obtained, the groove portion is integrally formed with the flange portion of the one skin material. Along with the formation, the flange portion of the other skin material is provided with a protruding portion that fits into the recessed groove portion of the flange portion of the one skin material to maintain a predetermined overlapping state, and the recessed groove portion By fitting the ridges, the flange portions of each of the skin materials are attached to each other so as to form a predetermined tangent line, and then a resin material is introduced to the back surface side of the skin material including the flange portions to integrate them. The present invention relates to a method for producing a skin-integrated molded article, which is characterized in that

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a perspective view of an essential part showing an example of a skin material used in the manufacturing method of the present invention, FIG. 2 is a cross-sectional view thereof, FIG. 3 is a cross-sectional view showing a state in which the skin material is bonded, and FIG. FIG. 5 is a cross-sectional view showing another example of the skin material, FIG. 5 is a cross-sectional view showing the other example, FIG. 6 is a further cross-sectional view showing a method of manufacturing the skin material, and FIG. 6 is a cross-sectional view showing a method of manufacturing a skin material that is bonded to the skin material shown in FIG. 6, and FIG. 8 is a cross-sectional view showing a state in which the skin materials obtained in FIGS. 6 and 7 are bonded.

The manufacturing method of the present invention, as described above,
With a method suitable for obtaining a single skin-integrated molded product in which the color or texture of the skin is partially different, the flanges formed along the tangent line of each skin are separated from the back surface of the skin. By folding and polymerizing, the resin material is introduced to the back surface side of the skin material to obtain a single skin-integrated molded product.

As shown in FIG. 1, the skin materials 11, 12 are
Is made of soft vinyl or the like and is formed into a predetermined independent skin shape by known slush molding. The skin materials 11 and 12 have flange portions 13 and 14 formed on the end side along the joining line L.

The skin materials 11 and 12 constitute a single skin material 10 by bending the flange portions 13 and 14 to the back surface side of the skin material and polymerizing them. The flange portion 13,
Of the fourteen, the flange portion of one of the skin materials (in this example, 1
In 3), a groove portion 15 is formed on the surface of the other skin material that overlaps the flange portion 14. The recessed groove portion 15 is superposed on and bonded to a ridge portion 16 which will be described below.
It is for connecting 1 and 12, and is preferably provided in parallel along the tangent line L.

As can be seen from FIG. 2, the recessed groove portion 1
A thick portion 17 is formed in the opening 19 of No. 5, and the width of the opening 19 is formed narrower than the inside of the groove. The thick portion 17 imparts rigidity to the opening portion 19 of the concave groove portion 15 and ensures engagement with the ridge portion 16 to stably maintain a predetermined overlapping state.

On the other hand, on the flange portion 14 of the other skin material 12, a ridge portion 16 is provided along the joining line L so as to be fitted into the recessed groove portion 15 to maintain the overlapping state of the flange portion. Has been done. The ridge portion 16 has a base portion 18 formed to be narrower than other portions, and the groove portion 1 is provided.
The root portion 18 is securely engaged and held by the thick-walled portion 17 when it is fitted into the ridge 5, so that the ridge portion 16 does not easily fall off. The flange portions 13 and 14
Are overlapped with each other and the ridge portion 16 is fitted into the concave groove portion 15, whereby the flange portions 13 and 14 form a predetermined tangent line L on the back surface of the skin material 10, and are joined together while maintaining the overlapping state. To be done.

The shapes of the groove 15 and the ridge 16 can be appropriately selected depending on the thickness and rigidity of the skin material to be joined. Further, the concave groove portion 15 and the ridge portion 16 are integrally formed at the same time as the molding of the skin material by forming a predetermined mold shape in the flange portion forming portion of the molding die for molding the skin material.

As shown in FIG. 3, these independent skin materials 11 and 12 are integrally connected by fitting the concave groove portion 15 and the ridge portion 16 to form a single skin material 10. After that, the skin material 10 is set in a product mold, a necessary core material is arranged, and a resin material such as urethane is introduced to the back surface side thereof to embed the flange portions 13 and 14 and the skin material 10
It is integrally molded with.

FIG. 4 shows another example of the skin material used in the manufacturing method of the present invention. Reference numerals 21 and 22 are skin materials,
Reference numerals 23 and 24 are flange portions. In this example, the flange portion 23 of one of the skin materials 21 is provided with two recessed groove portions 25, 25 along a predetermined joining line L, and the flange portion 24 of the other skin material 22 is provided with the recessed groove portions 25, 25. Two projecting ridges 26, 26 to be fitted in 25 are provided. According to this structure, the flange portions 23 and 24 are more reliably joined together.

The skin material shown in FIG. 5 is attached to the flange portion 33 of one skin material 31 along a predetermined joining line L.
A groove portion 35 and a ridge portion 36 are provided. The flange portion 34 of the other skin material 32 is provided with a ridge 37 and a groove 38 corresponding to the groove 35 and the ridge 36.

Further, FIGS. 6 to 8 show the case where the concave groove portion and the protruding portion are formed by the insert. That is, as shown in FIG. 6, a protrusion 42 is formed on the flange portion forming portion 41 of the skin forming die 40, and the groove-shaped insert material 43 is set on the protrusion 42. The insert material 43 is formed into a predetermined shape with appropriate rigidity by injection molding or extrusion molding. Then, by introducing the resin material forming the skin material 44 into the molding die 40, the skin material 44 in which the concave groove portion 46 formed by the insert material 43 is formed in the flange portion 45 is obtained.

Similarly, as shown in FIG. 7, an insert material 50 forming a ridge is arranged on a skin forming die 48 for forming another skin material 47. The insert material 50 has a ridge portion 51 and a base portion 52 formed in a shape that can be fitted to the recessed groove-shaped insert material 43, and the protrusion portion 51 is provided on a flange portion forming portion 53 of a molding die. It is integrally molded by setting it in the formed insert groove 54. The flange portion 49 of the skin material 47 integrally formed in this way has a base portion 52 of the insert material 50.
Of the ridge portion 5 in a state of being embedded integrally in the skin material 47.
1 protrudes, and this ridge 51 is the ridge 55 of the skin material 47.
Becomes

Then, as shown in FIG. 8, the projections 55 are fitted into the recessed grooves 46 formed by the respective insert materials so that the respective flange portions 45 and 49 are attached to each other so that the skin materials 44 and 47 are integrated. Be converted.

The formation of the concave groove portion or the ridge portion by such an insert material is performed when the concave groove portion or the ridge portion of the skin material itself has insufficient rigidity, or when the concave groove portion or the ridge portion of the skin material itself is formed on the flange portion of the skin material. This can be effectively carried out when it is difficult to form the ridge portion. It should be noted that either one of the recessed groove portion and the ridge portion may be formed by the insert material.

[0023]

As shown and described above, according to the manufacturing method of the present invention, independent skin materials can be easily joined without using a special device or jig. Therefore, the process of such joining work can be rationalized and the production cost can be reduced. In addition, the joint is due to the fitting of the concave groove provided in the flange and the ridge, which is reliable and strong, there is no displacement or protrusion of the joint line, and the appearance and accuracy are stable. You can get quality products. In particular, since this type of skin material is flexible and has low rigidity, the present invention is practical and useful.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part showing an example of a skin material used in a manufacturing method of the present invention.

FIG. 2 is a sectional view thereof.

FIG. 3 is a cross-sectional view showing a state in which the skin material is attached.

FIG. 4 is a cross-sectional view showing another example of the skin material.

FIG. 5 is a sectional view showing another example of the same.

FIG. 6 is a cross-sectional view showing still another example and showing a method for manufacturing a skin material.

FIG. 7 is a cross-sectional view showing a method of manufacturing a skin material that is attached to the skin material shown in FIG.

FIG. 8 is a cross-sectional view showing a state in which the skin materials obtained in FIGS. 6 and 7 are bonded together.

FIG. 9 is a perspective view showing an example of an instrument panel of a general automobile.

FIG. 10 is a cross-sectional view showing the main part thereof.

FIG. 11 is a cross-sectional view showing another example.

FIG. 12 is a sectional view showing still another example.

[Explanation of symbols]

 10 Skin Material 11 Skin Material 12 Skin Material 13 Flange Part 14 Flange Part 15 Recessed Groove Part 16 Projection L Parting Line

Claims (1)

[Claims] 1. When obtaining a single skin-integrated molded product in which a flange portion is formed by bending each independent skin material along a tangent line toward the back side of the skin material, to obtain a single skin-integrated molded product, the flange portion of one of the skin materials is provided. A groove portion is integrally formed, and a flange portion of the other skin material is provided with a ridge portion that fits into the groove portion of the flange portion of the one skin material to maintain a predetermined overlapping state. By fitting the ridges into the groove portions, the flanges of the respective skin materials are attached to each other so as to form a predetermined tangent line, and thereafter, the resin material is provided on the back surface side of the skin material including the flanges. A method for manufacturing a skin-integrated molded article, which comprises introducing into a body and integrally molding.