KR20060102151A - Teflon powder coating type rim for manufacturing the memory foam ear-plug - Google Patents

Teflon powder coating type rim for manufacturing the memory foam ear-plug Download PDF

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KR20060102151A
KR20060102151A KR1020050024083A KR20050024083A KR20060102151A KR 20060102151 A KR20060102151 A KR 20060102151A KR 1020050024083 A KR1020050024083 A KR 1020050024083A KR 20050024083 A KR20050024083 A KR 20050024083A KR 20060102151 A KR20060102151 A KR 20060102151A
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South Korea
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mold
memory foam
fluorine resin
foam ear
release agent
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KR1020050024083A
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Korean (ko)
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KR100688033B1 (en
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석창성
구재민
김영덕
김상영
배봉국
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성균관대학교산학협력단
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06—Protective devices for the ears
    • A61F11/08—Protective devices for the ears internal, e.g. earplugs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2827/00—Use of polyvinylhalogenides or derivatives thereof as mould material
    • B29K2827/12—Use of polyvinylhalogenides or derivatives thereof as mould material containing fluorine

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

본 발명은 금형덮개와 금형틀로 구성되는 메모리폼 이어플러그용 분체 불소수지 코팅 반응사출성형식 금형에 관한 것으로서,The present invention relates to a powder fluorine resin coating reaction injection molding type mold for memory foam earplugs, which is composed of a mold cover and a mold mold.

상기 금형틀(21)의 접촉표면부(21a)와 성형부(21b)에는 분체로 된 불소수지의 코팅층(22)이 형성되어 있는 것을 특징으로 하므로, 이형제처리나 공압처리 등 별도의 공정이 없이도 이어플러그 등의 제작이 용이하고, 제작시간이 크게 단축되고 재료비용도 절감되며, 이형제의 불균일한 도포로 인해 발생되던 불량률을 낮출 수 있고, 금형작업 시 발생하는 분진의 양을 현저하게 줄임으로써 작업환경을 개선시킬 수 있다는 이점이 있다.Since the coating layer 22 made of powdered fluorine resin is formed on the contact surface portion 21a and the forming portion 21b of the mold 21, even without a separate process such as release agent treatment or pneumatic treatment. It is easy to manufacture ear plugs, greatly shorten the manufacturing time, reduce material costs, reduce the defect rate caused by uneven application of the release agent, and significantly reduce the amount of dust generated during mold work. The advantage is that the environment can be improved.

Description

메모리폼 이어플러그용 분체 불소수지 코팅 반응사출성형식 금형{TEFLON POWDER COATING TYPE RIM FOR MANUFACTURING THE MEMORY FOAM EAR-PLUG}Powder Fluoropolymer Coating Reaction Injection Mold for Memory Foam Ear Plugs {TEFLON POWDER COATING TYPE RIM FOR MANUFACTURING THE MEMORY FOAM EAR-PLUG}

도 1은, 종래 메모리폼 이어플러그의 반응사출성형식 금형의 단면도이다.1 is a cross-sectional view of a reaction injection molding die of a conventional memory foam ear plug.

도 2는, 본 발명에 따른 메모리폼 이어플러그용 분체 불소수지 코팅 반응사출성형식 금형의 단면도이다.2 is a cross-sectional view of a powder fluorine resin coating reaction injection molding mold for a memory foam ear plug according to the present invention.

《도면의 주요 부분에 대한 부호의 설명》`` Explanation of symbols for main parts of drawings ''

1: 메모리폼 이어플러그 제품(폴리우레탄)1: Memory foam ear plug products (polyurethane)

11: 종래 메모리폼 이어플러그의 반응사출성형식 금형11: Reaction injection molding mold of conventional memory foam ear plug

12: 도포된 이형제층12: applied release agent layer

13: 금형덮개13: mold cover

14: 공압장치14: Pneumatic

21: 불소수지 소재를 가공한 메모리폼 이어플러그의 반응사출성형식 금형21: Reaction injection molding mold of memory foam ear plug processed with fluorine resin

22: 분체 불소수지 코팅층22: powder fluorine resin coating layer

23: 메모리폼 이어플러그의 반응사출성형식 금형의 덮개23: Cover of reactive injection mold of memory foam earplug

본 발명은 메모리폼 이어플러그용 분체 불소수지 코팅 반응사출성형식 금형에 관한 것으로서, 특히 이형제를 사용하지 않고도 메모리폼 소재의 이어플러그 등을 용이하게 성형 및 탈형할 수 있도록 한 불소수지 소재 반응사출성형식 금형에 관한 것이다. The present invention relates to a powder fluorine resin coating reaction injection molding mold for memory foam ear plugs, and in particular, a fluororesin reaction injection property which enables to easily mold and demould an ear plug of a memory foam material without using a release agent. It is about a type mold.

일반적으로 메모리폼 이어플러그의 재료로는 발포 폴리우레탄이 사용되고 있으며, 성형을 위한 금형으로는 금속재의 반응사출성형식 금형이 많이 사용되고 있다.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.

그런데, 상기 발포 폴리우레탄은 보통 표면 점착성(혹은 끈적임)이 있어, 금형에 쉽게 달라붙기 때문에 메모리폼이 금형틀로부터 쉽게 탈형되지 않는 문제점이 있었다.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.

이를 방지하기 위해, 종래에는 메모리폼의 원료주입 이전에 금형의 내부 표면에 이형제를 도포하여 금형과 메모리폼 사이에 분리막을 형성하였고, 탈형과정에서는 금형과 메모리폼의 틈새로 공압을 분사하는 방식이 주로 사용되어 왔다.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.

보다 구체적으로는, 도 1에 나타낸 바와 같이, 먼저, 불소수지 소재(1)를 금형에 주입하기 전에 금형틀(11)과 금형덮개(13)의 내면에 미리 이형제(12)를 도포하여 얇은 막을 형성한다. 메모리폼 이어플러그의 성형후 이형제의 막은 곧 사라지므로, 탈형작업시 금형덮개(13)를 열고 금형틀(11)에 남아 있는 메모리폼 이어플러그(1)를 공압(14)을 이용하여 분리할 필요가 있다.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.

그러나, 이형제의 도포와 공압의 분사작업은 매우 번거로운 공정일 뿐만 아니라, 인체에 유해한 분진과 악취를 발생시켜 열악한 작업환경을 유발할 수 있다는 문제점이 있었다.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.

또한, 이형제의 도포가 불균일할 경우에는 제품불량의 원인이 되었다.In addition, uneven application of the release agent caused product defects.

본 발명은 상기한 문제점을 해결하기 위해 안출된 것으로서, 발명의 목적은 폴리우레탄으로 구성된 메모리폼 이어플러그를 형성할 때 이형제를 사용하지 않고서도 메모리폼이 금형틀의 표면에 달라붙는 경우가 없어, 환경오염을 대폭 줄이고 제품의 품질을 크게 향상시킬 수 있는 메모리폼 이어플러그용 분체 불소수지 코팅 반응사출성형식 금형을 제공하는데 있다.The present invention has been made to solve the above problems, the object of the invention is that the memory foam does not stick to the surface of the mold without using a release agent when forming a memory foam ear plug made of polyurethane, It is to provide powder fluorine resin coating reaction injection mold for memory foam ear plug which can greatly reduce environmental pollution and greatly improve product quality.

상기한 목적을 달성하기 위해, 본 발명에 따른 메모리폼 이어플러그용 분체 불소수지 코팅 반응사출성형식 금형은,In order to achieve the above object, the powder fluorine resin coating reaction injection molding mold for a memory foam ear plug according to the present invention,

상기 금형틀의 접촉표면부와 성형부에는 분체로 된 불소수지의 코팅층이 형성되어 있는 것을 특징으로 한다.The contact surface portion and the molding portion of the mold is characterized in that the coating layer of powdered fluorine resin is formed.

여기서, 상기 금형덮개는 금속으로 구성된 것이 바람직하다.Here, the mold cover is preferably composed of a metal.

그리고, 상기 금형덮개의 표면은 표면처리가 이루어지지 않은 것이 바람직하다.The surface of the mold cover is preferably not surface treatment.

이하, 첨부한 도 2를 참조하여 본 발명의 바람직한 일 실시예를 상세히 설명 한다.Hereinafter, with reference to the accompanying Figure 2 will be described in detail a preferred embodiment of the present invention.

도 2는, 불소수지 소재를 가공한 메모리폼 이어플러그의 반응사출성형식 금형의 단면도이다.2 is a cross-sectional view of a reaction injection molding die of a memory foam ear plug processed with a fluorine resin material.

도시된 바와 같이, 본 실시예에 따른 메모리폼 이어플러그의 반응사출성형식 금형은 금형덮개(23)와 금형틀(21)로 구성되어 있다.As shown, the reaction injection molding mold of the memory foam ear plug according to the present embodiment is composed of a mold cover 23 and a mold frame 21.

상기 금형틀(21)은 일반 금형용 금속으로 구성되어 있으며, 형상에 맞도록 가공하여 형성된다. 상기 금형틀(21)의 접촉표면부(21a)와 성형부(21b)에는 분체로 된 불소수지의 코팅층(22)이 형성되어 있다.The mold frame 21 is made of a metal for general mold, and is formed by processing to match the shape. On the contact surface 21a and the molding portion 21b of the mold 21, a coating layer 22 made of powdered fluorine resin is formed.

그리고, 상기 금형틀(21)과 쌍을 이루는 금형덮개(23)는, 표면처리를 하지 않은 금속으로 구성되는 것이 좋다. 이는 메모리폼 상단과의 점착성을 유지하여 탈형을 보다 용이하게 하기 위함이다.In addition, the mold cover 23 paired with the mold frame 21 may be made of a metal which is not surface treated. This is to maintain the adhesiveness with the top of the memory foam to facilitate demolding.

상기 금형틀(21)의 접촉표면부(21a)와 성형부(21b)에 도포된 분체 불소수지 코팅층(22)에 의해, 메모리폼의 원료인 폴리우레탄이 금속의 금형틀(21)에 점착하는 경우를 방지할 수 있다.The powder fluorine resin coating layer 22 applied to the contact surface portion 21a and the forming portion 21b of the mold 21 allows the polyurethane, which is a raw material of the memory foam, to adhere to the metal mold 21. The case can be prevented.

더욱이, 상기 금형덮개(23)는 표면처리가 없는 통상적인 금형소재로 구성되어 있고 이형제도 적용되지 않았기 때문에, 메모리폼 이어플러그의 탈형시 금형틀(21)로부터의 분리가 더욱 용이하게 된다(도 2의 오른쪽 도면 참조).Moreover, since the mold cover 23 is made of a conventional mold material without surface treatment and no release agent is applied, the mold cover 23 is more easily separated from the mold 21 when demolding the memory foam ear plug (Fig. 2, right side drawing).

이하, 도 2를 참조하여, 메모리폼 이어플러그를 형성하는 순서를 간략히 설명한다.Hereinafter, the procedure for forming the memory foam ear plug will be briefly described with reference to FIG. 2.

먼저, 폴리우레탄 원료(1)를 금형틀(21)의 내부에 주입한 후 금형덮개(23)로 덮은 상태에서, 노에서 가열하면 기포가 발생되면서 메모리폼의 이어플러그가 생산된다.First, the polyurethane raw material 1 is injected into the mold frame 21 and then covered with a mold cover 23, and when heated in a furnace, air bubbles are generated and earplugs of the memory foam are produced.

이에 따라, 탈형시 금형덮개(23)가 열릴 때, 메모리폼은 표면장력이 거의 없는 금형틀(21)에는 점착하지 않고, 표면처리가 없는 금형덮개(23)에 붙어서 자연스럽게 탈형이 이루어지게 된다.Accordingly, when the mold cover 23 is opened during demolding, the memory foam does not adhere to the mold frame 21 having little surface tension, and adheres to the mold cover 23 without surface treatment, thereby naturally demolding.

즉, 분체 불소수지 코팅층(22)이 메모리폼의 원료인 폴리우레탄과 금형틀(21)의 원료인 금속과의 직접적인 접촉을 막아 서로 점착하는 것을 방지하게 된다.That is, the powder fluorine resin coating layer 22 prevents direct contact between the polyurethane, which is a raw material of the memory foam, and the metal, which is a raw material of the mold 21, to prevent adhesion.

상기한 바와 같은 구성의 본 발명에 따르면, 금형틀의 접촉표면부와 성형부에는 분체로 된 불소수지의 코팅층이 형성되어 있고, 금형덮개는 표면처리가 이루어지지 않은 일반 금형소재로 구성하여 점착성을 크게 함으로써, 탈형시 메모리폼의 상단이 금형덮개에 부착되어 금형으로부터 쉽게 빠져 나올 수 있다.According to the present invention having the above-described configuration, a coating layer of powdered fluorine resin is formed on the contact surface portion and the molding portion of the mold frame, and the mold cover is made of a general mold material having no surface treatment, and thus adhesiveness is achieved. By making it larger, the upper end of the memory foam is attached to the mold cover during demolding so that it can be easily removed from the mold.

이에 따라, 이형제처리나 공압처리 등 별도의 공정이 필요없으므로, 제작시간이 크게 단축되고 재료비용도 절감된다.This eliminates the need for a separate process such as release agent treatment or pneumatic treatment, greatly reducing manufacturing time and reducing material costs.

또한, 이형제의 불균일한 도포로 인해 발생되던 불량률을 낮추고, 금형작업 시 발생하는 분진의 양을 현저하게 줄임으로서 작업환경을 개선시킬 수 있다는 이점도 있다.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 (3)

금형덮개와 금형틀로 구성되는 메모리폼 이어플러그용 반응사출성형식 금형에 있어서,In the reactive injection molding mold for memory foam ear plug, which consists of a mold cover and a mold frame, 상기 금형틀(21)의 접촉표면부(21a)와 성형부(21b)에는 분체로 된 불소수지의 코팅층(22)이 형성되어 있는 것을 특징으로 하는 메모리폼 이어플러그용 분체 불소수지 코팅 반응사출성형식 금형.Powder fluorine resin coating reaction injection resistance for memory foam ear plugs, characterized in that the coating surface 22 of powdered fluorine resin is formed on the contact surface portion 21a and the molding portion 21b of the mold 21. Type mold. 제1항에 있어서,The method of claim 1, 상기 금형덮개(23)는 금속으로 구성된 것을 특징으로 하는 메모리폼 이어플러그용 반응사출성형식 금형.The mold cover 23 is a reaction injection mold for a memory foam ear plug, characterized in that consisting of a metal. 제2항에 있어서,The method of claim 2, 상기 금형덮개(23)의 표면은 표면처리가 이루어지지 않은 것을 특징으로 하는 메모리폼 이어플러그용 반응사출성형식 금형.Reaction injection molding mold for a memory foam ear plug, characterized in that the surface of the mold cover 23 is not surface treatment.
KR1020050024083A 2005-03-23 2005-03-23 Teflon powder coating type rim for manufacturing the memory foam ear-plug KR100688033B1 (en)

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