JPH0367620A - Molding device for multi-color skin material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a molding apparatus for a multicolored skin material suitable for automobile interior materials such as instrument panels.

(Prior Art) In recent years, due to the diversification of cars, there has been a demand for interior materials for automobiles in multiple colors. This multicolored skin material can be obtained, for example, by cutting thermoplastic synthetic resin sheets of different colors into predetermined shapes and then joining the cut sheet pieces together by sewing or welding. You will be able to do it.

This method requires a cutting process and a sewing or welding process to join them together, and since sewing is very troublesome and time-consuming, the manufacturing process was streamlined as described in JP-A-59-1.59309. Something is publicly known.

That is, as shown in FIG. 6, partitions 07 are formed in a mold 103 having a heating means 101 such as a heater using a partition forming jig 105, and thermoplastic synthetic resin powder is filled and gelled on the inner peripheral surface. thermoplastic synthetic resin layer, first skin material 1
After forming 09, it is turned over as shown in FIG. 7 to discharge excess powder, and then the partition forming jig 105 is removed and thermoplastic synthetic resin powders of different colors are formed as shown in FIG. It is then filled again to form a thermoplastic synthetic resin layer and a second skin material 111 on the inner peripheral surface as shown in FIG.

(Problem to be Solved by the Invention) As described above, the first and second skin materials 109 and 111 are turned over from the state shown in FIG. 9, the excess thermoplastic synthetic resin powder is discharged, and the molds are removed. However, the area of the first skin material 109 has a double structure in which the second skin material 111 of a different color overlaps. For this reason, the first skin material 1
The area 09 is thicker than the area of the second skin material 111, and the difference in thickness causes an uncomfortable feeling when touched, which is not desirable in terms of quality. Furthermore, when forming the second skin material 111, the first skin material 109 is heated again by the heating means 101, so that the first skin material 109 has a double structure.
Temperature control in this area becomes troublesome, making it difficult to stabilize quality.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a molding apparatus for a multicolored skin material that solves the above-mentioned problems.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a separation/contact method that is heated by a heating means to form a thermoplastic synthetic resin layer on the inner peripheral surface. a pair of molding molds, a partition member that partitions the molding molds and separates the molding molds and is movable into and out of the thermoplastic synthetic resin layer, and an adhesive container whose volume changes when the molding molds approach each other. and an adhesive passage that communicates with the adhesive container and rises between the molds and above the ends of the thermoplastic synthetic resin layer when the volume of the adhesive container changes.

(Function) According to this molding apparatus, independent thermoplastic synthetic resin layers of different colors can be obtained on the mold and the inner peripheral surface of the mold by the partition member. Next, after retracting the partition member,
When the molds are brought close to each other, the adhesive is pushed upward by the change in volume of the adhesive container, rises through the adhesive passage, and securely adheres each end of the thermoplastic synthetic resin layer to each other.

As a result, a continuous multicolored skin material of approximately the same thickness can be obtained.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings of FIGS. 1 to 5.

1 in the figure shows a molding device that can be turned over 180 degrees vertically, and the molding device 1 has a pair of divided left and right molds 3, 3, a partition member 5 that partitions the molds 3 and 3, and a bonding Agent 7
It has an adhesive container 9 containing.

The mold 3 has independent compartments 18 and 15 forming thermoplastic synthetic resin layers 10 and 10 on the inner circumferential surface thereof by a partition member 5, and is supported by drive devices 17 and 17 using hydraulic pressure or the like so as to be able to come into and out of contact with each other. ing.

One oil passage 19 is provided inside the mold 3,
High temperature oil flows into the oil passage 19 from the outside and circulates, thereby controlling the molds 3 to a predetermined heating temperature. In this case, heating means such as a heater may be used instead of oil.

The partition member 5 is formed into a plate shape and is supported by an air actuation device 121 so as to be able to move forward and backward in the vertical direction, and heat insulating materials 23 are provided in the mold 3 and the region in contact with the mold 3. This prevents the heat from the mold 3 from being transmitted to the main body of the partition member 5, and prevents it from affecting the thermoplastic synthetic resin powder, paste, etc. filled in the partitions 13 and 15. There is.

The adhesive container 9 was supported below the molds 3, 3 without being affected by the movement of the molds 3, and was fixed to the left and right molds 3, 3. It has a shape in which the volume changes as the opposing pistons 25 and 25 expand and contract. The amount of change in volume of the adhesive container 9 is such that when each piston 25 is contracted, that is, when the molds 3 are fully approached, the adhesive 7 reaches the top of the adhesive passage 27 formed inside the mold. It is pushed up and placed correctly on the ends of the thermoplastic synthetic resin layers 10 and 11, and the movement distance of each piston 25 and the cross-sectional area of the adhesive passage 27 are determined.

The adhesive 7 is an emulsion type urethane adhesive that solidifies when water evaporates due to the heat of approximately 110°C from the heater 27, which can be moved back and forth. The adhesive container 9 is always replenished.

In the molding apparatus configured in this manner, as shown in FIG. 2, after filling the independent compartments 13 and 15 with thermoplastic synthetic resin powder or paste such as vinyl chloride resin of different colors, one oil passage is opened. Thermoplastic synthetic resin layers 10 and 11 of different colors, which are melted or gelled, are obtained on the inner peripheral surfaces of the molds 3 and 3 by flowing high-temperature oil through them. next,
As shown in FIG. 3, it is rotated 180 degrees to discharge excess thermoplastic synthetic resin powder to a recovery container (not shown), then reversed 180 degrees to return to its original position, and the partition member 5 is retreated.

Subsequently, as shown in FIG. 4, the molds 3 are brought closer to each other. At this time, the ends of the thermoplastic synthetic resin layers 10 and 11 approach the bonded state, and the adhesive 7 in the adhesive container 9 is pushed up by the pistons 25 and 25 and passes through the bonding passage 27 to form the thermoplastic synthetic resin layer. It will now be displayed correctly on top of each terminal for 10 and 11.

At the same time, the heater 27 is moved forward to dry and solidify the adhesive 7, and the adhesive 7 is removed from the mold, so that two continuous multicolored skin materials having approximately the same thickness can be obtained as shown in FIG.

[Effects of the Invention] As explained above, according to the molding apparatus of the present invention, a multicolored skin material having almost the same thickness can be obtained, so that there is no discomfort when touching it, and there is no loss of quality. In addition, when the molds are brought close to each other, the adhesive pushed up through the adhesive passages ensures that the ends of the thermoplastic synthetic resin layers that come close to each other are bonded to each other.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view of a molding device for multicolored skin material of the present invention, Figs. 2, 3, and 4 are explanatory views of the operation, and Fig. 5 is a perspective view of the multicolored skin material removed from the mold. , Figure 6, Figure 7, Figure 8
9 are operation explanatory diagrams showing a conventional example. 3... Molding mold 5... Partition member 9... One adhesive container... Oil passage (heating means) 27... Adhesive passage

Claims (1)

[Claims] A pair of molds that are heated by a heating means and can be separated and brought into contact to form a thermoplastic synthetic resin layer on the inner circumferential surface, and a advancing and retracting method that separates the molds from each other and forms independent thermoplastic synthetic resin layers. an adhesive container whose volume changes when the molds approach each other; and the thermoplastic synthetic resin layer, which communicates with the adhesive container and passes between the molds when the volume of the adhesive container changes. A molding device for multicolored skin material, characterized in that it is equipped with a terminal and an adhesive passage rising above the terminal.