KR100681785B1 - A rim made of teflon for manufacturing the memory foam ear-plug - Google Patents

Abstract

The present invention relates to a reaction injection molding mold for memory foam ear plugs processed with a fluorine resin material composed of a mold cover and a mold mold.

Part of the mold mold 21, the memory foam ear plug is formed of a non-adhesive fluorine resin material, and the mold cover 22 is characterized in that the metal, a separate process such as release agent treatment or pneumatic treatment Without this, it is easy to manufacture ear plugs, greatly reduce manufacturing time, reduce material costs, reduce defect rate caused by uneven application of release agent, and significantly reduce the amount of dust generated during mold work. This has the advantage of improving the working environment.

Description

A RIM MADE OF TEFLON FOR MANUFACTURING THE MEMORY FOAM EAR-PLUG}

1 is a cross-sectional view of a reaction injection molding die of a conventional memory foam ear plug.

2 is a cross-sectional view of a fluororesin material (Teflon) reaction injection molding die for memory foam ear plug molding according to the present invention.

`` Explanation of symbols for main parts of drawings ''

1: Memory foam ear plug products (polyurethane)

11: Reaction injection molding mold of conventional memory foam ear plug

12: applied release agent layer

13: mold cover

14: Pneumatic

21: Reaction injection molding mold of memory foam ear plug processed with fluorine resin

22: Cover of reaction injection mold of memory foam earplug

 The present invention relates to a reaction injection mold for a memory foam ear plug processed with a fluorine resin material, and in particular, a fluorine resin material reaction for easily forming and demoulding the ear plug of a memory foam material without using a release agent. An injection molding die.

In general, foamed polyurethane is used as a material of the memory foam earplugs, and a reaction injection molding mold of a metal material is used as a mold for molding.

However, the foamed polyurethane usually has a surface adhesiveness (or stickiness), and thus has a problem in that the memory foam is not easily demolded from the mold because it easily sticks to the mold.

In order to prevent this, conventionally, a mold release agent was applied to the inner surface of the mold before injection of the raw material of the memory foam to form a separator between the mold and the memory foam. Mainly used.

More specifically, as shown in FIG. 1, first, before the fluorine resin material 1 is injected into the mold, the mold release agent 12 is applied to the inner surfaces of the mold mold 11 and the mold lid 13 in advance to obtain a thin film. Form. After molding of the memory foam earplugs, the film of the release agent disappears soon. Therefore, during the demolding operation, it is necessary to open the mold cover 13 and separate the memory foam earplugs 1 remaining in the mold mold 11 using pneumatics 14. There is.

However, the application of the release agent and spraying of the pneumatic pressure is not only a very cumbersome process, but also has a problem in that it may cause harmful dust and odor to the human body and cause a poor working environment.

In addition, uneven application of the release agent caused product defects.

The present invention has been made to solve the above problems, the object of the invention is that when forming a memory foam earplug made of polyurethane, without sticking without using a release agent, significantly reduce environmental pollution and improve the quality of the product To provide a reaction injection molding mold for memory foam earplugs processed with fluorine resin material which can be greatly improved.

In order to achieve the above object, the reaction injection molding mold for memory foam ear plugs processed fluorine resin material according to the present invention,

It consists of mold cover and mold frame,

The mold is characterized in that made by processing a fluororesin material such as polytetrafluoroethylene (PTFE).

Here, the mold cover is preferably composed of a metal.

The surface of the mold cover is preferably not surface treatment.

In addition, the mold is preferably housed in a case made of metal.

Hereinafter, with reference to the accompanying Figure 2 will be described in detail a preferred embodiment of the present invention.

2 is a cross-sectional view of a reaction injection molding die of a memory foam ear plug processed with a fluorine resin material.

As shown, the reaction injection molding mold of the memory foam ear plug according to the present embodiment is composed of a mold cover 22 and a mold frame 21.

The mold 21 is made of a fluorine resin material such as polytetrafluoroethylene (PTFE), and is formed by processing to fit the shape. It is advantageous in strength that the mold die 21 is housed in a case 23 made of a general mold metal.

The mold cover 22 paired with the mold frame 21 may be made of metal which has not been surface treated. This is to maintain the adhesiveness with the top of the memory foam to facilitate demolding.

Since the fluorine resin material constituting the mold 21 does not adhere to polyurethane, which is a raw material of the memory foam, it is not necessary to apply a release agent to the inner surface of the mold 21.

Moreover, since the mold cover 22 is made of a conventional mold material without surface treatment and no release agent is applied, the mold cover 22 is more easily separated from the mold frame 21 when demolding the memory foam ear plug (Fig. 2, right side drawing).

Hereinafter, the procedure for forming the memory foam ear plug will be briefly described with reference to FIG. 2.

First, the polyurethane raw material 1 is injected into the mold mold 21 and then covered with a mold lid 22, and when heated in a furnace, air bubbles are generated and earplugs of the memory foam are produced.

Accordingly, when the mold cover 22 is opened during demolding, the memory foam does not adhere to the mold frame 21 having almost no surface tension, and adheres to the mold cover 22 to naturally demold.

According to the present invention of the above-described configuration, by forming a mold by processing a non-adhesive fluorine resin (aka Teflon), the mold cover is formed by the large mold by the general mold material without surface treatment, demolding The top of the memory foam is attached to the mold cover so that it can be easily removed from the mold.

This eliminates the need for a separate process such as release agent treatment or pneumatic treatment, greatly reducing manufacturing time and reducing material costs.

In addition, there is an advantage that the working environment can be improved by lowering the defect rate caused by uneven application of the release agent and significantly reducing the amount of dust generated during the mold operation.

Claims (4)

delete delete In the reactive injection molding mold for memory foam ear plug, which consists of a mold cover and a mold frame, The mold frame 21 is made by processing a fluorine resin material, The mold cover 22 is made of a metal, the surface of the mold cover 22, the reaction injection molding mold for a memory foam ear plug, characterized in that the surface treatment is not made. The method of claim 3, wherein Reaction injection molding mold for a memory foam ear plug, characterized in that the mold frame 21 is accommodated in the case 23 made of metal.

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