JPH0646920U - Foam molding die skin material fixing structure - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a new skin material fixing structure for a foam-molded product, which allows the undercut portion to be demolded without removing the skin material in advance. [Structure] In a structure in which an end of a skin material 30 is attached to a convex portion 20 provided on a split mold 12 portion of a foam molding die 10 to fix the skin material to the molding die, the convex portion is Formed on the support member 25 independent of the split mold part,
The split mold portion is configured to be slidable in the mold outside direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a structure for fixing a skin material of a foaming mold.

[0002]

[Prior art]

 For example, when molding interior parts such as vehicle instrument panels, set a skin material such as vinyl chloride on the mold surface of the foam molding die, and then inject the foam resin material inside the skin material. It is 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. In the figure, reference numeral 50 is a foaming mold, 51 is a mold main body, 52 is a split mold, 54 is a cylinder device that slides and opens the split mold 52, and 55 is an undercut portion.

At that time, as shown in the drawing, 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, and the skin material 60 is fixed to the mold surface to inject the foamed resin material. Molding is done.

When the molded product P is taken out after the foam molding, the split mold 52 is slid in the direction of the arrow in FIG. 4 by the cylinder device 54, and the undercut portion 55 is first demolded. 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 convex prior to the sliding of the split mold. It had to be removed from the part 56, and the work was complicated.

[0005]

[Problems to be solved by the device]

 The present invention has been proposed in view of the above problems, and a new foam-molded article skin material fixing method capable of demolding the undercut portion without preliminarily removing the skin material. It is intended to provide structure.

[0006]

[Means for Solving the Problems]

 That is, according to this invention, an end portion of a skin material is attached to a convex portion provided on a split mold portion of a foam molding die to fix the skin material to the molding die, and the convex portion is described above. A skin material fixing structure for a foam molding die, characterized in that the split mold portion is formed on a support member independent of the split mold portion, and the split mold portion is configured to be slidable in a direction outside the mold.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of an essential 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 thereof, and FIG. 3 is a sectional view taken along line 3-3 of FIG.

FIG. 1 and FIG. 2 show an example of a skin material fixing structure of a foaming mold of the present invention. The foaming mold 10 comprises a cavity mold 11 having a predetermined molding product cavity and a split mold 12 which is openably and closably attached to the molding mold 11. An outer skin material 30 having an outer shape is arranged and integrally molded with a foaming resin material. Reference numeral 14 is an undercut portion.

As can be understood from FIG. 2, the split mold 12 of the foam molding die 10 is configured to be slidable in the outside direction of the mold, and when the mold is opened, the undercut portion 14 is removed first. It is configured so that the product can be easily taken out by molding.

A convex portion 20 is formed at an appropriate position above the split mold 12 via a support member 25. The convex portion 20 engages with the concave portion 31 provided at the end of the corresponding skin material 30, and serves to fix the skin material 30 to the mold surface.

The supporting member 25 is an arm-shaped member provided corresponding to the formation position of the convex portion 20 as shown in the figure, and its end is fixed to the mold body, in the embodiment, the cavity mold 11. Has been. 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 12a 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 15 is formed between the back surface 12b of the split mold 12 and the support member 25, the split mold 12 slides independently in the mold outward direction when the mold is opened. You can

According to this structure, since the support member 25 that supports the convex portion 20 is independent of the split mold 12, when the mold is opened, the skin material 30 is kept attached to the convex portion 20 and split. Only the mold 12 can be slid out of the mold. As a result, 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. it can.

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]

[Effect of device]

 As shown and described above, according to the skin material fixing structure of the foam molding die of the present invention, the skin material remains attached to the convex portion (dough) of the split mold before the molded product is released from the mold. Only the undercut part can be demolded with. 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

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location // B29K 105: 04 105: 20 B29L 31:58 4F

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.