JPH0218018A - Manufacture of skin material - Google Patents

Abstract

PURPOSE:To eliminate the overlapping of skin constituent bodies and contrive to reduce cost by a method wherein skin-forming materials, which are different in color form each other, are heated by the heat of a mold so as to form the skin constituent bodies, the shapes of which correspond to those of partitioned forming surfaces of the mold and having at the portions corresponding to a partition plate welding allowances. CONSTITUTION:First skin-forming material 16 and second skin-forming material 17, which are different in color from each other, are respectively charged in a first partition chamber 13 and a second partition chamber 14, which are partitioned with a partition plate 12, of a mold 8 and heated by the heat of the mold 8 so as to form a first skin constituent body 5 and a second skin constituent body 6, the shapes of which correspond to those of partitioned forming surfaces of the mold 8, and, at the same time, resin pieces 5a and 5b are welding allowances at the adjacent parts of the first and the second skin constituent bodies 5 and 6. After that, said resin pieces are welded together with a welder device and at the same time their portions excluding the weld are cut off with a cutter so as to obtain a variegated skin material 1. The obtained skin material 1 has no overlapped portions of the first and the second skin constituent bodies 5 and 6, resulting in eliminating the loses of the first and the second skin forming materials 16 and 17 and contriving to reduce cost.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method of manufacturing a unique skin material.

(Prior Art) Conventionally, as a method for producing a unique skin material, for example, as disclosed in JP-A-59-159309, the inside of a mold is divided into two first and second parts by a partition plate. First, a skin molding material is supplied to one of the first compartments and heated at the mold temperature of the mold to correspond to the shape of the molding surface of the first compartment. The first skin structure is molded. Next, after discharging the skin molding material from the first compartment by inverting the mold, a skin molding material different in color from the skin molding material is supplied to the mold from which the partition plate has been removed. By heating at the mold temperature of the mold, a second skin structure corresponding to the shape of the molding surface of the second compartment was formed, whereby the first and second skin structures were integrally joined. Methods of obtaining unique skin materials are known.

(Problems to be Solved by the Invention) However, in the above conventional method, when molding the second skin structure, the partition plate that partitions the first and second compartments is removed, and the entire molding surface of the mold is Since the skin forming material for forming the skin structure is supplied, the first skin structure of the obtained unique skin material is overlapped with the second skin structure, and the skin forming material is wasted accordingly. There was a problem that the cost would increase. Furthermore, in the above-described method, the skin forming material must be supplied to the mold every time the first and second skin structures are molded, and therefore the mold must be inverted each time. There was also the problem that the number of molding steps increased, reducing work efficiency.

The present invention has been made in view of the above, and its purpose is to improve the structure of the partition plate that divides the inside of the mold into a plurality of compartments, thereby simultaneously forming the skin structure in each of the compartments. In addition, it is possible to form a body, and also to integrate both adjacent skin components by a subsequent simple joining process, thereby efficiently obtaining a unique skin material with no waste in the skin molding material. be.

(Means for Solving the Problems) In order to achieve the above object, the solving means of the present invention first divides the inside of a mold into a plurality of compartments using partition plates. Next, a skin molding material of a different color is supplied to each of the formed compartments and heated at the mold temperature of the mold, so that the partition part of the partition plate corresponds to the shape of the compartment molding surface part of the mold. A uniquely colored skin structure with a welding margin in the area corresponding to the area is molded. Thereafter, after the skin molding material is discharged from each compartment of the mold, the welding margins of the skin structures are welded together.

(Function) With the above configuration, in the method of the present invention, the unique skin molding material supplied to each of the plurality of compartments formed inside the mold by partition plates is heated at the mold temperature of the mold. It is heated to form a skin structure of a different color, which corresponds to the shape of the partition molding surface portion of the mold and has a welding margin at a portion corresponding to the partition portion of the partition plate. The welding margins of each skin structure are welded together after the skin molding material is discharged from the mold.

From this, the obtained uniquely colored skin material has no overlapping parts of the skin structure, and therefore the skin molding material can be used without waste, leading to cost reduction. Further, it becomes possible to simultaneously supply different colored skin molding materials to the mold, and therefore only one reversal operation is required, thereby improving work efficiency.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 5 shows a skin material 1 obtained by the method of the present invention, and the skin material 1 is applied to a crash pad 2 constituting the upper surface of an instrument panel of a vehicle such as an automobile, as shown in FIG. It is something that The crash pad 2 is formed in a sandwich structure in which a hard urethane material 4 is integrally sandwiched between the skin material 1 and the core material 3. Further, the skin material 1 is integrally molded with a first skin structure 5 that occupies approximately one-third of the upper side and a second skin structure 6 that occupies approximately two-thirds of the lower side. The first and second skin structures 5 and 6 are each made of different colors of synthetic resin such as polyvinyl chloride.

Next, to explain the manufacturing procedure of the skin material 1, first, as shown in FIG. A box-shaped molding device 10 is prepared which is divided into upper and lower halves. A temperature control pipe 11 is arranged outside the mold 8 of the molding device 10 to provide the mold 8 with a predetermined mold temperature. On the other hand, on the inside of the storage box 9, a partition plate 12 having a tapered part 12a formed at its tip is provided protrudingly. The tip of the mold 12a is in contact with or close to the molding surface 7 of the mold 8, so that the inside of the mold 8 (molding device 10) is divided into a plurality of (two) first and second molds by the partition plate 12. It is divided into two compartments 13 and 14. Further, a heating wire 15 is embedded in the tapered portion 12a of the partition plate 12.

Next, the first skin molding material 16 made of resin powder such as polyvinyl chloride is placed on the first compartment 13 side of the storage box 9 of the molding device 10, and the first skin molding material is placed on the second compartment 14 side. After supplying the second skin molding material 17 made of the same material and having a different color from 16, the storage box 9 is
and the mold 8 are joined, and the mold 8 is held in a downward position.

Then, in this state, the mold 8 is heated by circulating heating oil through the temperature adjustment pipe 11. As a result, the first and second skin molding materials 16.17 on the molding surface 7 side in both the first and second compartments 13.14 are heated, and as shown in FIG. At the mold temperature, first and second skin structures 5.6 corresponding to the shapes of the compartment molding surfaces in both the first and second compartments 13.14 are molded. In addition, a resin piece corresponding to the tapered shape of the tapered portion 12a of the partition plate 12 is provided at a portion corresponding to the partition portion of the partition plate 12, that is, at the boundary between the first skin structure 5 and the second skin structure 6. 5a and 6a are molded by the mold temperature of the tapered portion 12a heated by the heat dissipation action of the heating wire 15.

Thereafter, as shown in FIG. 2
After being moved and discharged from the compartments 13 and 14 to the storage box 9 side, the mold 8 is separated from the storage box 9.

After that, the first and second molds attached to the mold 8 are removed.
Using the resin pieces 5a and 6a of the skin structure 5.6 as a welding margin,
Welding device 18 equipped with a cutter function as shown in FIG.
As shown in FIG. 4, the resin pieces 5a and 6a are welded to each other, and at the same time, the parts other than the welded parts are cut by a cutter 19, and the first and second skin structures 5 and 6 are integrally joined. A unique skin material 1 is obtained. The skin material 1 thus obtained is then removed from the mold 8 and bonded together with the core material 3 and the hard urethane material 4 as a component of the crash pad 2, as shown in FIG.

As described above, in this embodiment, the first and second skin molding materials 16 and 17 of different colors are supplied to each of the first and second compartments 13 and 14 of the mold 8 that are partitioned by the partition plate 12. By heating the first and second skin molding materials 16 and 17 at the mold temperature of the mold 8, the first and second skin structures 5 corresponding to the shapes of the partitioned molding surfaces of the mold 8 are formed.
, 6, and the first and second skin structures 5, 6.
Resin pieces 5a and 6a are molded as welding margins adjacent to each other. Then, the resin pieces 5a and 6a are welded together using a welding device 18, and at the same time, the parts other than the welded portions are cut using a cutter 19, thereby obtaining a different-colored skin material 1.

Therefore, in the obtained skin material 1, there is no overlapping portion of the first and second skin structures 5 and 6, and the first and second skin forming materials 16 and 17 are not wasted, thereby reducing costs. can be achieved. In addition, the unique first and second
The skin molding materials 16 and 17 can be simultaneously supplied to the mold 8, and only one reversal operation is required, thereby improving work efficiency.

In the above embodiment, the mold 8 is divided into two first and second compartments 13 and 14, but the present invention is not limited to this, and for example, the mold 8 can be divided into three or more compartments to obtain the skin material 1 of three or more colors. It is also possible to adopt this method.

Further, in the above embodiment, the case where the skin material 1 is applied to the crash pad 2 that constitutes the upper surface of an instrument panel of a vehicle such as an automobile is shown, but it may also be applied to other interior parts or articles other than vehicles. Good too.

(Effects of the Invention) As explained above, according to the method of the present invention, a skin molding material of a different color is supplied to each of the plurality of compartments formed by partitioning a mold with partition plates, and is heated at the mold temperature of the mold. By doing this, a unique skin structure is molded that corresponds to the shape of the compartment molding surface of the mold and has a welding margin at the part corresponding to the partition of the partition plate, and then the skin is removed from each compartment of the mold. Since the welding margins of the respective skin structures are welded together after the molding material is discharged, it is possible to eliminate waste due to overlapping of the skin structures and reduce costs. In addition, different skin molding materials can be simultaneously supplied to the mold, and only one reversal operation is required, thereby improving work efficiency.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIGS. 1 to 4 are process diagrams showing the forming process of the skin material, FIG. 5 is a longitudinal sectional view of the skin material, and FIG. 6 is a longitudinal sectional view of the crash pad. be. DESCRIPTION OF SYMBOLS 1... Skin material, 5... First skin structure, 6... Second skin structure, 5a, 6a... Resin piece (welding allowance), 7
... Molding surface, 8... Molding mold, 12... Partition plate, 1
3...First compartment, 14...Second compartment, 16...
- First skin molding material, 17... second skin molding material.

Claims (1)

[Claims] (1) Divide the inside of the mold into multiple compartments with partition plates,
Next, a skin molding material of a different color is supplied to each of the formed compartments and heated at the mold temperature of the mold, so that the partition part of the partition plate corresponds to the shape of the compartment molding surface part of the mold. A skin structure of a different color having a welding margin at a portion corresponding to the above is molded, and then, after discharging the skin molding material from each compartment of the mold, the welding margins of the skin construction are welded to each other. Method of manufacturing skin material.