JPH0751291Y2 - Foam molding die skin material fixing structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a structure for fixing a skin material of a foaming mold.

[0002]

2. Description of the Related Art For example, when molding interior parts such as an instrument panel of a vehicle, a skin material made of vinyl chloride or the like is set on a mold surface of a foam molding die, and then a foamed resin material is provided inside the skin material. Is injected and molded integrally. In particular, as shown in FIG. 4, in the case of a product having an undercut portion, a molding die having a split mold portion that can be opened and closed is used in order to facilitate demolding. Reference numeral 50 in the drawing is a foaming mold, 51 is a mold main body,
52 denotes a split mold, 54 denotes a cylinder device that slides the split mold 52 to open and close, and 55 denotes an undercut portion.

At this time, as shown in the figure, a dowel (projection) 56 is provided at a predetermined position of the split mold 52 in order to accurately position the skin material on the mold surface. On the other hand, in the skin material 60,
A concave portion 61 is formed at a position corresponding to the convex portion 56, the convex portion 56 and the concave portion 61 are engaged with each other, the skin material 60 is fixed to a mold surface, and injection molding of a foamed resin material is performed.

When the molded product P is taken out after foam molding, the split mold 52 is moved by the cylinder device 54 as shown in FIG.
The undercut portion 55 is first removed by sliding in the direction of the arrow. However, in such a structure for fixing the skin material, since the concave portion 61 of the skin material 60 is engaged with the convex portion 56 of the split mold 52, the skin material 60 is projected before the sliding of the split mold. It had to be removed from 56, and the work was complicated.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above problems, and is a novel foaming method capable of removing the undercut portion from the mold without removing the skin material in advance. It is intended to provide a structure for fixing a skin material of a molded product.

[0006]

[Means for Solving the Problems] That is, this invention is
In the one in which the end portion of the skin material is fixed to the convex portion provided on the split mold portion of the foam molding die to fix the skin material to the molding die, the convex portion is independent of the split mold portion. The present invention relates to a skin material fixing structure for a foam molding die, which is formed on a support member and is configured such that the split mold portion is slidable in the mold outer direction.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. 1 is a perspective view of a main part showing an example of a skin material fixing structure of the present invention, FIG. 2 is a sectional view taken along line 2-2, and FIG. 3 is a sectional view taken along line 3-3 in FIG.

1 and 2 show an example of a structure for fixing a skin material of a foam molding die of the present invention. This foam mold 10
Is a cavity mold 11 having a predetermined molded product cavity.
And a split mold 12 which is openably and closably attached to the mold 11.
A skin material 30 formed in advance in the outer shape of the product by vacuum molding or the like is arranged on the mold surface 13 and integrally molded with the foamed resin material. Code 1
4 is an undercut portion.

As can be seen from FIG. 2, the split mold 12 of the foaming mold 10 is constructed so as to be slidable in the outside direction of the mold, and when the mold is opened, the undercut portion 14 is first removed from the mold. Then, the product is easily taken out.

A convex portion 20 is formed at an appropriate position above the split mold 12 through a support member 25. This convex portion 20 is a concave portion 3 provided at the end of the corresponding skin material 30.
1 for fixing the skin material 30 to the mold surface.

As shown in the figure, the support member 25 is provided with the convex portion 20.
The arm-shaped member is provided at a position corresponding to the forming position, and its end is fixed to the mold body, which is the cavity mold 11 in the embodiment. The tip of the support member 25 is attached to the groove-shaped holding portion 17 above the split mold 12, and holds the convex portion 20 at a height position protruding from the upper surface 12 a of the split mold 12. The support member 25 is independent of the split mold 12 portion and does not move when the split mold 12 is opened or closed.

Further, since the space portion 15 is formed between the back surface 12b of the split mold 12 and the support member 25, the split mold 12 is independently slid to the outside of the mold when the mold is opened. be able to.

According to this structure, since the support member 25 for supporting the convex portion 20 is independent of the split mold 12, the skin material 30 is split while the convex portion 20 is kept engaged when the mold is opened. Type 1
Only 2 can be slid out of the mold. Thereby, only the undercut portion 14 can be opened first without the skin material 30 and the convex portion 20 interfering with each other and being deformed or broken, and the product can be easily demolded. .

Incidentally, the split mold of the portion where the convex portion is not provided is only slidable, and it is not necessary to attach a supporting member as shown in FIG.

[0015]

As shown and described above, according to the foam material fixing structure of the foam molding die of the present invention, the skin material is formed into the convex portion (dough) of the split mold before the molded product is released from the mold. Only the undercut part can be removed from the mold while it is attached. Therefore, it is not necessary to remove the skin material, the product can be easily taken out, and the workability is good. In addition, when the mold is opened, the skin material is not pulled or deformed or broken by the convex portion.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part showing an example of a skin material fixing structure of the present invention.

FIG. 2 is a sectional view taken along the line 2-2.

FIG. 3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a cross-sectional view showing a main part of a general foaming mold.

[Explanation of symbols]

 10 Foaming Mold 11 Cavity Mold 12 Split Mold 20 Convex 25 Supporting Member 30 Skin Material

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Claims (1)

[Scope of utility model registration request] 1. A structure in which an end of a skin material is engaged with a convex portion provided on a split mold portion of a foam molding die to fix the skin material to the molding die, wherein the convex portion is the split mold. A skin material fixing structure for a foam molding die, characterized in that the split mold portion is formed so as to be slidable in the mold outside direction while being formed on a support member independent of the portion.