JPH0692092B2 - Resin molding method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a resin molded product having a surface material such as cloth or leather adhered to the surface thereof.

2. Description of the Related Art As a resin molding method of this type, for example, a method shown in FIG. 4 is known. As shown in FIG. 4 (A), after the skin material 3 that has been cut into a predetermined shape is set on the lower mold 2 in the mold open state, the extruder 4 is moved to plasticize the skin material 3. The resin 5 thus converted is extruded ((B) in the figure). Extruder 4 is NC
By control, for example, the plasticized resin 5 is moved in a two-dimensional direction in a horizontal plane and the plasticized resin 5 is extruded in a pattern that matches the shape of the molded product. Then, after waiting for the extruder 4 to move out of the mold, the upper and lower molds 1 and 2 are clamped as shown in FIG. As a result, the skin material 3 and the resin 5 are brought into close contact with each other, and at the same time, they are molded into a predetermined shape, and a so-called composite molded product W is obtained as shown in FIG.

Problems to be Solved by the Invention When molding a relatively large molded product such as an automobile part based on the above-described molding method, the cycle time becomes long because the time required for extrusion becomes long in the whole process. , Productivity is reduced.

Means for Solving the Problems The present invention is intended to shorten the cycle time as much as possible, and as shown in Examples, a molded product is formed on a skin material prepared outside the mold in advance. The plasticized resin is extruded according to the shape, and the skin material extruded with the plasticized resin is set in a mold and compression molded.

Action As described above, by extruding the plasticizing resin on the surface material outside the mold, in parallel with the compression molding, the plasticizing resin is extruded on the surface material in preparation for the next molding. It will be possible to shorten the cycle time.

Embodiments FIGS. 1 to 3 are views showing an embodiment of the present invention. FIGS. 1 (A) to (D) show details of a molding process, and FIG. 3 shows details of a molding apparatus. ing.

As shown in FIG. 3, the molding apparatus includes a mold 6 including upper and lower molds 1 and 2, an extruder 4, a table 7, and a table 7.
The upper skin material 3 is composed of a drawing-in device 8 and the like for drawing it into the mold 6.

A base material 9 of a skin material wound in a roll shape is provided at one end of the table 7, and the skin material 3 is drawn from the base material 9 onto the table 7 sequentially by a drawing device 8. Further, the extruder 4 has a function of moving in a two-dimensional direction, for example, in a horizontal plane by NC control as in the conventional case, and extruding the plasticized resin 5 in a pattern matching the shape of the molded product. Reference numeral 10 is a frame supporting the extruder 4.

The retraction device 8 is configured around a transport bar 13 that linearly reciprocates between a solid line position and an imaginary line position Q by meshing of a rack 11 and a pinion 12, for example. Bakiyumupu as a means 14
Is attached. Reference numeral 15 is a motor as a rotation drive source of the pinion 12.

A cutter 16 is attached to the upper mold 1, and the cutter 16 cuts the skin material 3 drawn into the lower mold 2 into a predetermined length as described later.

Here, one embodiment of the present invention will be described together with the operation of the molding apparatus.

As shown in FIG. 1 (A), assuming that the mold 6 is compression-molded in the previous cycle, the next molding is performed on the table 7 simultaneously with this compression molding. Preparations are made to prepare.

That is, as shown in FIG. 1 (B), the extruder 4 is operated in the mold clamping state of the mold 6, and the plasticized resin 5 is extruded onto the skin material 3 set on the table 7. .
The amount of the resin 5 to be extruded onto the skin material 3 is measured at the nozzle side of the extruder 4, and for example, as shown in FIG. 2, the resin 5 having a shape and weight corresponding to the final molded product shape P is used. Extrude.

Then, as shown in FIG. 1 (C), the die 6 is opened and the molded product W of the previous cycle is taken out.
13 moves in the direction of arrow (A). At this time, since the skin material 3 on the table 7 is adsorbed and supported by the vacuum cup 14, the skin material 3 follows the transport bar 13 and is drawn onto the lower mold 2.

When the skin material 3 on which the plasticizing resin 5 is placed is drawn onto the lower mold 2, the upper mold 1 is lowered and the mold is clamped as shown in FIG. 1 (D). When the mold is clamped, the cutter 16 operates to cut the skin material 3 drawn into the mold 6 from the base material 9 side to a predetermined length.

Then, as shown in FIGS. 1 (A) and 1 (B), the mold 6 is completely clamped to move to compression molding, while the table 7 is pressed.
As described above, the preparation for the next molding is carried out as described above, and finally, as shown in FIG. 1 (C), a molded product W in which the resin 5 and the skin material 3 are integrated is obtained.

EFFECTS OF THE INVENTION According to the present invention, since the plasticized resin is extruded on the skin material prepared outside the mold in advance, and is set in the mold for compression molding, compression molding and resin extrusion are different from the conventional ones. And can be performed in parallel, and the cycle time can be greatly shortened.

[Brief description of drawings]

1 (A), (B), (C), and (D) are process explanatory views showing an embodiment of the present invention, FIG. 2 is an explanatory view at the time of extruding a plasticized resin, and FIG. 3 is a molding process. FIG. 4A, FIG. 4A, FIG. 4B, FIG. 4C, and FIG. 4D are process explanatory diagrams of a conventional molding method. 1 ... Upper mold, 2 ... Lower mold, 3 ... Skin material, 4 ... Extruder, 5 ... Plasticizing resin, 6 ... Mold, 7 ... Table, 13 ... Conveyor bar, W
…Molding.

Claims (1)

[Claims] 1. A method for molding a resin molded product having a surface material adhered to the surface thereof, which comprises extruding a plasticized resin on a surface material prepared outside a mold in accordance with the shape of the molded product. A resin molding method, characterized in that a skin material extruded with a plasticizing resin is set in a mold and compression molded.