JPS6028581Y2 - Mold for hot press molding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold for use in hot press shaping a laminate in which a flexible surface material is laminated on a foamed synthetic resin sheet that can be deformed by heating.

Surface materials such as cushions for seats in vehicles and furniture, cushions for bedding, etc. are required to have good texture and moisture absorption, and recently, from a design perspective, uneven patterns on the surface are required. is required.

In order to meet these demands, we used a laminate made by laminating a flexible surface material on a foamed resin sheet that has cushioning properties and can be deformed by heating, and pressed the laminate into an arbitrary pattern. A method of forming an arbitrary concavo-convex pattern is carried out by using a press forming mold to perform hot press forming from above and below.

The present invention is an improvement on the conventionally used hot press shaping mold, and is capable of making the uneven pattern formed on the surface of the laminate more clearly, deeply and clearly embossed. It is.

As shown in Fig. 3, the conventional hot press forming mold is made of a material with good thermal conductivity and consists of an upper mold 1 and a lower mold 2, and the upper mold 1 has a pressing mold in an arbitrary pattern. 1a was formed.

When a laminate in which a flexible surface material is laminated on a foamed synthetic resin sheet is heated and press-shaped using such a mold to form a pattern, the pattern-formed portion of the laminate is formed by the pressing die 1a. The laminate is heated and press-molded, leaving other parts uncompressed, but since the press-forming mold has good thermal conductivity, the parts of the laminate that are not heated and compressed receive a considerable amount of radiant heat from the mold. As a result, as shown in FIG. 5, the foamed synthetic resin sheet 8' of the laminate loses its elasticity to restore its shape, and the surface pattern becomes gently curved.

As shown in Fig. 1, the hot press forming mold of the present invention is made of a material with good thermal conductivity such as metal.
The upper die 1 and the lower die 2 are formed with a die 1a and a die 2a in an arbitrary pattern.

The mold 1a of the upper mold 1 and the mold 2a of the lower mold 2 are formed into matching patterns.

A heat insulating material 3 and a heat insulating material 4 are provided except for the pressing mold parts of the pressing mold 1a and the pressing mold 2a of the upper mold 1 and the lower mold 2.

A material with high heat resistance is suitable for the heat insulating material 3.4, and glass wool, asbestos, rock wool, etc. are used.

The heat insulating material 3 is filled in a region of the upper die 1 surrounded by the patterned stamping die 1a.

The same process is performed for the lower mold 2.

The hot press molding mold of the present invention has the above-described structure, and this molding mold can be used in the same manner as conventional molds.

That is, as shown in FIGS. 1 and 2, the upper mold 1 and lower mold 2 of the hot press molding mold are installed between the upper hot plate 5 and the lower hot plate 6 of the press machine, and the surface of the foamed synthetic resin sheet 8 is A stretchable and flexible surface material 7 such as knitted fabric or synthetic resin leather is laminated on the foamed synthetic resin sheet 8, and an appropriate backing material 9 such as Kansai or Kanayama is laminated or not laminated on the back side of the foamed synthetic resin sheet 8. The separated laminate is placed between upper and lower molds, and the laminate is heated and press-molded by the upper and lower molds to form and fix an uneven pattern on the laminate as shown in FIG.

The conditions for this pressing are that the heating temperature is 150℃~
220℃, pressurization pressure 0.19/c1ft~10kg
/c7I! , press time is 0. Powder ~ 5 minutes.

Since the hot press molding mold of the present invention has the above structure, when a laminate is hot press molded using this hot press molding mold and an uneven pattern is formed on the laminate, the second As shown in the figure, the parts of the molds 1a and 2a arranged in a pattern are heated and pressed, and the other parts are heated and pressed with insulation materials 3 and 4.
4, the radiant heat from the upper die 1 and the lower die 2 is blocked, and the foamed synthetic resin sheet 8 can be press-pressed by the press dies 1a and 2a as shown in FIG. 4 without losing its elasticity. The grooves 10 in the cut portions are deep and appear at acute angles, which not only enhances the design effect but also provides a good texture.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the mold of the present invention placed between the hot plates of a press machine, and FIG. 2 is a cross-sectional view of a laminate heated and pressed using the mold of the present invention. Fig. 3 is a cross-sectional view of a conventional mold, Fig. 4 is a cross-sectional view of a laminate formed by hot press molding using the mold of the present invention, and Fig. 5 is a cross-sectional view of a laminate formed using a conventional mold. FIG. 1... Upper mold for molding, 1a... Pressing die for upper mold, 2... Lower mold for molding, 2a...
Lower mold press, 3, 4... Insulation material, 5...
・Hot plate above the press machine, 6...Hot plate below the press machine.

Claims (1)

[Scope of utility model registration request] In a press-forming mold that heat-press-shapes a laminate in which a flexible surface material is laminated on a foamed resin sheet to form an uneven pattern, a pressing part that press-shapes the laminate into a pattern is used. A mold for hot press molding, characterized in that a heat insulating material is provided on the outside of the mold.