JPH0737043B2 - Molding method for resin molded parts with wood board as surface material - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for molding a resin molded component using a wooden board as a surface material, which is used for interior parts for car parts, furniture for furniture, and the like.

[Prior Art] Interior parts such as automobile dashboards, cabinets for various equipment, and furniture furniture are preferably those with a wood pattern on the surface to create a luxurious atmosphere.

As a method of decorating the grain length, a conventional method, for example, a method of grain printing on the surface of a synthetic resin molded product, a method of putting a grain-printed synthetic resin sheet in a mold, and injection-molding a synthetic resin to melt-bond it, Alternatively, a method is known in which a synthetic resin molded product formed separately from this is attached to a plywood formed of real wood with an adhesive (for example, JP-B-57-7899 and JP-B-55-59942). Gazette, Japanese Patent Publication No. 63-95922).

[Problems to be Solved by the Invention] Among the above-mentioned conventional techniques, the one in which the surface of a synthetic resin molded product is subjected to wood grain printing is difficult to obtain a good wood texture in appearance, and a wood grain printed synthetic resin sheet is difficult to obtain. Similarly, in the case where insert molding is performed, a realistic wood texture cannot be obtained, while in the case where the plywood and the synthetic resin molded product are bonded together, the resin molding process and the bonding process are separate processes and productivity is increased. There is a problem that the cost is lowered and the cost is increased.

The present invention is made in order to eliminate all of the problems of the conventional method, a wooden texture excellent in appearance is obtained,
It is a technical object to provide a molding method of a resin mold part using a wooden board as a surface material, which can improve productivity and reduce cost by reducing the number of steps.

[Means for Solving the Problems] As a means for solving this technical problem, the present invention is a mold for injection molding a single wooden board or several wooden boards to which a thermosetting adhesive has been applied in advance. , The synthetic resin is injected on the back side of the wooden board to form the mounting member, and at the same time, the wooden board is shaped into a predetermined shape by the mold, and the wooden board and the mounting member are bonded and integrated. The method is the gist.

[Operation] Using a wooden board as a surface component gives a realistic wooden texture, and at the same time as the injection molding of the mounting member, the wooden board is shaped into a predetermined shape (shaped and bonded when there are several wooden boards). In addition, the wooden board and the mounting member can be bonded and integrated.

[Examples] Hereinafter, the present invention will be described in more detail with reference to the illustrated examples.

In FIG. 1, reference numeral 1 denotes a wood board decorative board, which is formed of a veneered wood veneer or the like having an appropriate thickness, and a protective plate 2 is attached to the back surface of the wood board decorative board 1 with an adhesive 2a. The mounting member 3 is made of synthetic resin on the back surface side, and the whole is shaped into a predetermined shape when the synthetic resin is injection-molded.

A component having such a configuration can be manufactured using the injection molding machine 4 as shown in FIG. That is, first, the wood decorative plate 1 and the protective plate 2 on the back surface thereof are set in the cavity 41a of the cavity body 41, and the protective plate 2 is pre-coated with an adhesive. The wood decorative plate 1 and the protective plate 2
The set holding of and is carried out by temporarily holding it in the cavity by vacuum suction 41b. Reference numeral 42 denotes a movable side mold plate, which shapes a predetermined part shape together with the cavity body 41, and has a gate pole 42a for injecting a synthetic resin on the back surface side of the protection plate 2, and a part after injection molding. The push-out pin 42b for pushing out is provided. Reference numeral 43 is a fixed-side template, which has a spool 43a, which is connected to the runner 41c of the cavity body 41. Reference numeral 44 is a support block for the movable-side template, and 45 is a mounting plate for the movable-side template 42.

The injection molding by the injection molding machine 4 is performed by injecting a thermoplastic synthetic resin into the nozzle touch portion of the fixed-side mold plate 43 after mold clamping. The injected synthetic resin flows from the spool 43a of the fixed-side mold plate 43 into the runner 41c of the cavity body 41, and is further injected from the gate pole 42a of the movable-side mold plate 42 to the back surface side of the protection plate 2. It At this time, the wood decorative plate 1 and the protective plate 2 are pressure-bonded to the cavity of the cavity main body 41 to be bonded and integrated, and the cavity is shaped into a predetermined surface shape, and the back surface side of the protective plate 2 is formed. The mounting member 3 is injection molded. After that, the mold clamping is released, the resin mold component 5 is taken out of the mold by the push pin 42b of the movable mold plate 42, and such a cycle is continuously repeated.

Next, the resin mold component 5 enters a finishing process. In the finishing process, the hanging gate pole 51 is cut off from the root, the peripheral edge 52 of the front face is trimmed cleanly, and holes are formed at necessary portions. After that, finish coating is applied to the surface of the wood decorative board 1, and the process ends.

The resin-molded component 5 thus formed has a wood decorative board 1 on its surface, and thus has a realistic wood texture. The back surface of the wood decorative board 1 is lined with a protective plate 2 so that it is strong. Since it has a strong structure and is shaped into a predetermined shape, it can be easily incorporated into a device or the like through the mounting member 3.

A plurality of wood boards may be used instead of the one wood decorative board 1. In this case, if a thermosetting adhesive is applied to the plurality of wood boards in advance, the mounting It is possible to bond a plurality of wooden boards while shaping the member 3 into a cavity shape by thermocompression bonding during injection molding. At this time, the protection plate 2 can be omitted.

Although not shown in the figure, a wood decorative board (0.2 to 0.5 mm thick)
In order to form a curved surface, aluminum foil (0.1 to 0.15 mm thick) is sometimes adhered. However, when insert molding is performed using this, in order to strengthen the adhesion with the synthetic resin, 50 It is convenient to spray aluminum to about 100 μm, because the mechanical anchor effect of resin adhesion can be aimed at.

[Effects of the Invention] As described above, according to the present invention, the curved surface shaping of real wood and the injection molding of the mounting member are simultaneously performed, and the real wood and the mounting member are bonded and integrated at the time of molding. Therefore, the finished part has a realistic wooden texture on the surface due to the wooden board on the surface, and has an excellent effect such that productivity can be improved and cost can be reduced by reducing the number of steps in manufacturing.

[Brief description of drawings]

FIG. 1 is an exploded front view of a resin mold part according to the present invention,
FIG. 2 is a mold configuration diagram of an injection molding machine for manufacturing the resin molded component, and FIG. 3 is a front view of the injection molded resin molded component. 1 ... Wooden decorative plate 2 ... Protective plate 3 ... Mounting member 4 ... Injection molding machine 5 ... Resin mold parts

Claims (1)

[Claims] 1. A wooden board or several wooden boards to which a thermosetting adhesive has been applied in advance is placed in an injection molding die, and a synthetic resin is injected on the back side of the wooden board to form a mounting member. At the same time, a method for molding a resin molded component using a wooden board as a surface material, characterized in that the wooden board is formed into a predetermined shape by the mold, and the wooden board and the mounting member are bonded and integrated.