JPS60219017A - Mold for foamed product - Google Patents

Abstract

PURPOSE:To eliminate the possibilities of producing defective moldings or damaging moldings by providing a sensor to detect the existence of a insert or its faulty setting. CONSTITUTION:A proximity switch sensor 5 to detect the existence of an insert and its faulty setting is embedded in the insert B setting part of a top force 1. A signal from the sensor 5 is transmitted to a control device 6 and a control signal is transmitted to a photoelectric panel 7 or a mold clamping device or a foam injecting device from the control device. Thus it is controlled so that the setting condition of an insert may be indicated or the mold clamping device or the foam injecting device may not operate during the faulty setting of an insert.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a mold used when integrally molding a synthetic resin foam having an insert.

(Description of Prior Art) Foam molded products such as urethane foam are used to attach the foam molded product to the main body of an automobile, such as an automobile instrument pad, urethane bumper, etc. , or often have a primarily metal insert inside for reinforcement. As a mold for molding such a foam, one that is capable of setting an insert in a cavity is used so that the insert can be buried at the same time as molding the foam.

In such molds, the inserts are fixed using magnets or pins, but workers may forget to set the inserts or set them in the wrong position due to operator carelessness or inexperience, resulting in distortion, etc. If the insert is not set in the correct position due to the shape of the insert, if foam molding is carried out under such conditions, the resulting molded product will not be a defective product, but the mold will not be set properly when the mold is closed. There was also a risk of damage to the insert.

(Object of the Invention) The present invention has been made in view of the above points, and provides a mold for a foam body having a sensing device for sensing the presence or absence of an insert and a defective set state.

(Structure of the Invention) The gist of the present invention achieved for the above-mentioned purpose is that a foam mold has a sensing device that senses the presence or absence of an insert and a setting failure.

An embodiment of the present invention will be described below with reference to the drawings.

The mold for an automobile instrument pad shown in FIG. 1 and FIG. 2, which is a partial sectional view taken along the cutting line A-A in FIG. Type 2 is 2
It is divided into six parts (as 2 bs 2 c), making it possible to mold an instrument pad having an undercut portion. The upper mold 1 has magnets 6 and pins 4 for positioning and fixing the inserts B, C, and the insert setting section has a sensing device consisting of a proximity switch that detects the presence or absence of inserts and detects whether they are set incorrectly. 5 is buried. A signal generated by the sensing device 5 indicating the presence or absence of an insert is sent to a control device 6, and from there a control signal is sent to an electric panel 7, a mold clamping device, or a foaming injection machine to display the set state of the insert. Alternatively, the mold clamping device or foam injection machine is controlled so as not to operate when the insert is improperly set.

There are various types of proximity switches used as the sensing device 5, but a high frequency oscillation type with a short detection distance of about 1 to several fins is preferred. This high frequency oscillation type proximity switch detects by stopping oscillation by changing the impedance of an oscillation coil in a high frequency oscillation circuit. still,
In this embodiment, the detection distance variable range is 0.6 to 1.
5 friends, Tateishi Electric Co., Ltd. E20-X, IR5'
A was used.

(Effects of the Invention) As described above, the mold according to the present invention is capable of detecting the presence or absence of an insert and whether it is poorly set, and it is possible to mold a foam with no insert installed or with a poorly set insert. There is no risk of the mold being damaged, the molded product becoming defective, or the mold being damaged.

[Brief explanation of drawings]

The drawings relate to embodiments of the present invention; FIG. 1 is a sectional view of a mold for an instrument pad, FIG. 2 is a partial sectional view η taken along the cutting line A-A in FIG. Upper mold, 2 is lower mold, 6 is magnet, 4 is between. 5 is a sensing device, A and B are inserts. Patent applicant: Inoue MCP Co., Ltd. Figure 1

Claims (1)

[Scope of Claims] 1. A foam mold characterized by having a sensing device for sensing the presence or absence of an insert and a setting failure. A mold for a foam according to claim 1, characterized in that the sensing device comprises a proximity switch.