JPH0516236U - Insert fixing structure in the headless mold - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an insert fixing structure in a headrest molding die capable of securely and easily fixing an insert in a molding die without a jig for fixing. A mold in which an insert 10 composed of a core body molded product 11 and a metal stay 12 is set in a molding die, a foamed resin material is injected into the molding die, and a headrest is formed integrally with the insert. An engaging protrusion 20 is provided integrally with the core stay molded product at the base of the metal stay protrusion of the core molded product, and the engagement protrusion is attached to a molding die to position and fix the insert. Try to do it.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a headrest mold for a vehicle, and particularly to an insert fixing structure thereof.

[0002]

[Prior Art]

 As shown in FIG. 4, a general vehicle headrest has an insert 55 arranged in a molding die 50 having a cavity 53 that defines a headrest shape and is made up of a lower die 51 and an upper die 52. The foamed resin material P is injected and molded integrally with the insert 55. Reference numeral 61 is a hinge portion that forms the lower mold 51 and the upper mold 52 so as to be openable and closable.

The insert 55 of the headrest is composed of a synthetic resin core molded product 57 blow-molded or injection-molded, and a metal stay 58 protruding from the stay protruding portion 54 of the core molded product 57. The insert 55 is fixed in the cavity 53 by attaching the tip of the metal stay 58 or the notch 59 for height adjustment to an insert fixing jig 60 provided in the upper die 52 of the forming die 50. It is molded integrally with the headrest.

However, in the above structure, it is difficult to attach the jig to the insert fixing jig 60 when the metal stay is short or when the metal stay is not provided, and it is difficult to perform the positioning reliably. In addition, the insert 55 wobbles when the lower mold 51 is clamped, and particularly in the case of a heavy insert having a built-in adjuster or the like, the insert 55 may fall into the cavity 53. Not only that, but there was also a problem with the precision of the molded product. Further, in the case of a retractable headrest, there is also a problem that the injected foamed resin material leaks into the gap with the metal stay 58 because the stay protruding portion 54 becomes a long hole.

[0005]

[Problems to be solved by the device]

 The present invention has been proposed in view of the above-mentioned problems, and when molding a foam-molded product having an insert, it has an extremely simple structure and does not require the use of a special jig in the mold cavity. It is intended to provide an insert fixing structure in a headrest molding die that can be securely and easily fixed to a headrest.

[0006]

[Means for Solving the Problems]

 That is, this invention is a mold in which an insert consisting of a core molded product and a metal stay is set in a molding die, a foamed resin material is injected into the mold, and a headrest is formed integrally with the insert. In the above, at the base of the metal stay protruding portion of the core body molded article, an engaging projection is provided integrally with the core body molded article, and the engaging projection is attached to the molding die to position and fix the insert. The present invention relates to an insert fixing structure in a headrest forming die, which is characterized by being formed.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing an example of an insert used for an insert fixing structure in a headrest molding die of the present invention, FIG. 2 is a sectional view showing a method of manufacturing a headrest molded product according to the present invention, and FIG. FIG.

As shown in FIG. 1, an insert 10 used in the structure of the present invention comprises a synthetic resin core body molded product 11 and a metal stay 12 protruding from the upper portion of the core body molded product 11. Reference numeral 13 is a notch provided in the metal stay 12 for adjusting the height of the headrest.

The core body molded product 11 is formed by blow molding or injection molding of a known synthetic resin into a core body shape, and the metal protrusion 12 is provided from the stay protruding portion 15 provided on the core body molded product 11. It is projected.

At the base of the stay protrusion 15, an engagement protrusion 20 integrally formed from the core body molded product is formed. The engaging projection 20 is engaged with the molding die for positioning and fixing the insert 10 in the die, and the height position thereof is appropriately determined according to the position of the insert in the molded product. Can be decided

A method of manufacturing a headrest molded product according to the structure of the present invention will be described with reference to FIGS. 2 and 3. As shown in the figure, the insert 10 is set in the cavity 33 of the molding die 30 including the lower die 31 and the upper die 32. Reference numeral 37 is a hinge portion that forms the lower mold 31 and the upper mold 32 so as to be openable and closable.

The upper die 32 is formed with an engaging recess 35 with which the engaging protrusion 20 of the insert 10 is engaged. As described above, the engaging recess 20 is engaged with the engaging protrusion 20 of the insert 10. The insert 10 is securely positioned and fixed in the mold. After the lower die 31 and the upper die 32 are clamped, the foamed resin material P is injected into the cavity 33 and molded integrally with the insert 10.

At this time, the engagement protrusion 20 improves the sealing performance between the upper die 32 and the core body molded product 11 of the insert 10, and the injected foamed resin material P wraps around to the metal stay 12 side. It does not leak into the core body molded product 11. The engaging projection 20 can be cut off after molding, if necessary, such as when the headrest to be molded is a retractable type.

[0014]

[Effect of the device]

 As shown and described above, according to the insert fixing structure of the headrest molding die of the present invention, the insert can be reliably and easily positioned and fixed to the molding die without using a fixing jig. Can be significantly improved. Further, since the insert does not drop into the cavity or shift in position, and the injected foamed resin material does not leak into the core molded product, a highly accurate headrest molded product can be obtained. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an insert used in an insert fixing structure in a headrest molding die of the present invention.

FIG. 2 is a sectional view showing a method of manufacturing a headrest molded product according to the structure of the present invention.

FIG. 3 is an enlarged cross-sectional view of the relevant part.

FIG. 4 is a cross-sectional view of a general headrest molding die.

[Explanation of symbols]

 10 Insert 11 Core Molded Product 12 Metal Stay 15 Metal Stay Projection 20 Engagement Projection P Foamed Resin Material

Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI Technical display area B29K 105: 20 4F B29L 31:58 4F

Claims (1)

[Scope of utility model registration request] 1. A mold in which an insert composed of a core molded product and a metal stay is set in a molding die, a foaming resin material is injected into the molding die, and a headrest is formed integrally with the insert, An engaging protrusion is integrally provided with the core molded product at the base of the metal stay protrusion of the core molded product, and the engaging protrusion is engaged with the molding die to position and fix the insert. An insert fixing structure for a headrest molding die, which is characterized in that