JP2535874Y2 - Slash mold - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a slush mold, and more particularly to a countermeasure against drainage after cooling.

[0002]

2. Description of the Related Art Conventionally, for example, door trims as interior parts for automobiles are provided with a sheet-like skin material on the surface from the viewpoint of improving appearance. In general, the skin material is molded by a vacuum molding method in which a heat-softened sheet is closely adhered to a molding die by vacuum evacuation and then cooled and solidified to form a predetermined shape, and a shell-shaped molding is performed. The method can be broadly classified into a slush molding method in which a sheet-like material formed into a predetermined shape is obtained by attaching and melting a powdery resin raw material to a mold.

When a sheet-like material such as a skin material is formed by the latter slush molding method, for example, as disclosed in Japanese Utility Model Application Laid-Open No. 3-45113, the slush molding die is turned upward after molding. It is possible to improve the drainage of the cooling water by cooling the sheet-like material by cooling water sprayed from below onto the back surface of the molding surface while holding it in an obliquely inclined posture. Proposed.

[0004]

However, in the method of the above-mentioned publication, a part of the cooling water may flow around the outer periphery of the molding surface even though the back surface of the molding surface is cooled. Drops of cooling water wrapped around the surface
When the posture of the molding surface is changed downward in preparation for the next molding, there is a problem that it flows to the molding surface and the molding surface is stained by water scale. If the molding surface is soiled in this way, scale will adhere to the surface of the subsequently formed sheet-like material, deteriorating its commercial value.

On the other hand, a slush mold with the sheet-like material adhered to the molding surface is set in a cooling box with the molding surface facing outward, and cooling water is supplied from a nozzle provided in the box to the back of the molding surface. However, even with this method, it is difficult to completely seal the space between the slash mold and the cooling box, and the cooling water leaks from between the two to form the molding surface. There is a case where the water drops around the outer periphery and the water droplets flow to the molding surface.

The present invention has been made in view of such a point, and an object of the present invention is to improve a mold structure on the outer periphery of a molding surface in a slash molding die so that cooling water flowing around the outer periphery of the molding surface is improved. An object of the present invention is to surely prevent water droplets from flowing to a molding surface when a mold posture is changed after molding, prevent contamination of a sheet-like material by water scale, and reduce a reduction in commercial value.

[0007]

Means for Solving the Problems In order to achieve the above object, a solution of the present invention is to form a sheet by adhering and melting a powdery resin material on a molding surface of a shell-shaped mold body. Then, in a slash molding die for removing the sheet-like material after cooling by spraying cooling water on the back surface of the molding surface, water droplets of the cooling water adhered to the outer periphery of the molding surface are applied to the molding surface when changing the mold posture after cooling. The configuration is such that a ridge for preventing flow is provided on the outer periphery of the molding surface.

[0008]

With the above arrangement, in the present invention, the slash molding die is formed such that cooling water is sprayed on the back surface of the slush molding die after the molding of the sheet, and after the sheet is released, the molding surface faces downward in preparation for the next molding. The posture is changed.

At this time, water droplets of the cooling water wrapping around and adhering to the outer periphery of the molding surface of the mold body tend to flow on the molding surface in accordance with the attitude changing operation of the slash molding die. The flow to the molding surface is reliably prevented by being interrupted by the ridges provided on the outer periphery, so that the sheet-like material is prevented from being stained by water scale and the commercial value is not reduced.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show a slush mold S according to an embodiment of the present invention. In the drawing, reference numeral 1 denotes a horizontally long rectangular mold body formed in a shell shape, and 3 denotes a molding surface (front side in FIG. 1; left side in FIG. 2) formed in the mold body 1; Is formed in the shape of a door trim as an interior part for automobiles, and a powdery resin material R such as polyvinyl chloride (shown in FIG. 5) is adhered and melted on the molding surface 3 to form a sheet-like material R 'as a skin material. (Shown in FIG. 6).

A pair of rotating shafts 5 and 5 are protruded from both sides of the short side of the mold body 1 to form a cooling box 19 (shown in FIG. 6) after the slash forming mold S is formed into a sheet-like material R '. ), And when preparing for the next molding after cooling and demolding, the slash molding die S is turned upside down by 180 ° by rotating both of the rotating shafts 5 and 5 by a rotating device (not shown). The posture is changed.

Further, as a feature of the present invention, a ridge 7 is provided on the outer periphery of the molding surface 3 so as to surround the molding surface 3, and as shown in detail in FIG. The water droplets w1 of the cooling water W (shown in FIG. 6) adhering to the surface are prevented from flowing to the molding surface 3 when the attitude of the mold is changed after cooling.

Next, the procedure for forming the sheet-like material R 'with the slash forming die S configured as described above will be described with reference to FIGS.

First, as shown in FIG. 4, the slash molding die S is held by the hanger 9 with the molding surface 3 facing downward, and the molding surface 3 is heated to a predetermined temperature by the heater 11 arranged below. .

Next, as shown in FIG. 5, the heated slush mold S is set in the raw material supply box 13 with the molding surface 3 facing downward so as to cover the opening thereof. Only two appear) clamp jig 15,
15, the outer periphery of the slash forming die S is clamped.

Thereafter, the raw material supply box 13 is connected to a pair (only one is shown in FIG. 5) of the rotating shafts 17, 17.
Is rotated up and down by 180 ° by a rotating device (not shown), and the powdered resin raw material R accommodated in the raw material supply box 13 is adhered to the molding surface 3.
As a result, the powdery resin raw material R attached to the molding surface is heated and melted by the mold temperature to form a sheet-like material R ′ (shown in FIG. 6).

Thereafter, the raw material supply box 13 is turned upside down by 180 °, and the excess powdery resin raw material R is dropped into the raw material supply box 13, and as shown in FIG.
The slush mold S to which the sheet-like material R 'is attached is set in the cooling box 19 so as to cover the opening thereof with the molding surface 3 facing upward, and a plurality of slash molds S (only two appear in FIG. 6).
, The outer periphery of the slash forming die S is clamped.

Next, a plurality of (only two nozzles appear in FIG. 6) nozzles 23 and 2 arranged in the cooling box 19 are shown.
The cooling water W is sprayed on the back surface of the molding surface 3 of the slush molding die S from 3, to cool the sheet-like material R '. At this time, a part of the cooling water W leaks to the outside from between the slash molding die S and the cooling box 19, and as shown in FIG. .
In FIG. 6, reference numeral 25 denotes a drain pipe for discharging the cooling water W accumulated in the cooling box 19 to the outside.

Thereafter, as shown by the imaginary line in FIG. 6, after releasing the sheet-shaped material R ', the clamping force of each clamp jig 21 is released, and the slash forming die S is lifted from the cooling box 19 and the next. The posture is changed so that the molding surface 3 faces downward in preparation for molding.

At this time, the water droplet w1 of the cooling water W, which has wrapped around and adheres to the outer periphery of the molding surface 3 of the mold body 1, tends to flow to the molding surface 3 with the attitude changing operation of the slash molding die S. , And is blocked by the ridge 7. As a result, the flow of the water droplets w1 onto the molding surface 3 can be reliably prevented, and the sheet-like material R 'can be prevented from being stained with water scale, thereby preventing a reduction in commercial value.

[0022]

[Effects of the Invention] As described above, according to the present invention,
A ridge is provided on the outer periphery of the molding surface, and the water droplets of the cooling water adhering to the outer periphery of the molding surface are prevented from flowing to the molding surface when the mold posture is changed after cooling. It is possible to prevent fouling due to water scale which causes a reduction in value.

[Brief description of the drawings]

FIG. 1 is a front view of a slush mold.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged view of a portion A in FIG. 2;

FIG. 4 is a drawing showing a heating process of a slush molding die.

FIG. 5 is a process diagram showing a state in which a slush mold is set in a raw material supply box.

FIG. 6 is a diagram illustrating a cooling process of a sheet-like material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Mold main body 3 ... Molding surface 7 ... Ridge part R ... Powdery resin raw material R '... Sheet material S ... Slash molding die W ... Cooling water w1 ... Water droplet

Claims (1)

(57) [Scope of request for utility model registration] 1. A sheet-like material is formed by adhering and melting a powdery resin raw material on a molding surface of a mold body formed in a shell shape, and cooling by spraying cooling water on a back surface of the molding surface. A slash molding die for removing a product, and a ridge on an outer periphery of the molding surface for preventing water droplets of cooling water adhering to an outer periphery of the molding surface from flowing to the molding surface when the mold posture is changed after cooling. A slush molding die, characterized by having