KR20030089337A - Injection method using insert preheating and that preheating device - Google Patents

Injection method using insert preheating and that preheating device Download PDF

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Publication number
KR20030089337A
KR20030089337A KR1020020027508A KR20020027508A KR20030089337A KR 20030089337 A KR20030089337 A KR 20030089337A KR 1020020027508 A KR1020020027508 A KR 1020020027508A KR 20020027508 A KR20020027508 A KR 20020027508A KR 20030089337 A KR20030089337 A KR 20030089337A
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South Korea
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insert
preheating
mold
molten resin
resin
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KR1020020027508A
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Korean (ko)
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강대웅
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한양정밀로보트 (주)
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Priority to KR1020020027508A priority Critical patent/KR20030089337A/en
Publication of KR20030089337A publication Critical patent/KR20030089337A/en

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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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03543—Mice or pucks

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE: An injection method using insert preheating and a preheating device are provided to remove thermal stress from an insert by minimizing the difference in temperature between melt resin and the insert. CONSTITUTION: An injection method using insert preheating comprises the steps of: preheating an insert(1); inserting the preheated insert into a mold; closing the mold simultaneously with inserting the insert; and injecting melt resin into the mold simultaneously with closing the mold.

Description

인서트 예열을 이용한 사출방법 및 그 예열장치{Injection method using insert preheating and that preheating device}Injection method using insert preheating and its preheating device

본 발명은 인서트 예열을 이용한 사출방법 및 그 예열장치에 관한 것으로, 더욱 상세하게는 인서트를 용융 수지의 온도에 가깝게 예열하여 사출에 적용함으로써 인서트와 접하는 부위의 용융 수지가 급냉각되는 것을 방지하여 접합력을 향상시키기 위한 것이다.The present invention relates to an injection method using an insert preheating and a preheating device thereof, and more particularly, to pre-heating the insert close to the temperature of the molten resin to apply to the injection to prevent rapid cooling of the molten resin in contact with the insert to prevent bonding. Is to improve.

주지하다시피, 인서트 사출이라 함은 이물질을 금형에 미리 삽입하고 용융된 수지를 주입하여 인서트가 일체로 삽입된 사출성형품을 한번의 공정으로 사출 성형하는 것을 의미하며, 인서트공정에서 삽입되는 이물질을 인서트라 한다.As is well known, insert injection means inserting a foreign material into a mold in advance and injecting molten resin to injection-molded an injection molded product in which the insert is inserted in one step, and inserting a foreign material inserted in the insert process. It is called.

이러한 인서트 사출방법은 사출성형품에 별도의 추가 공정없이 금속, 유리, 플라스틱과 같은 인서트를 일체로 결합시키고자 할 때 사용되는 것으로 부품수 및 제조공수를 줄일 수 있어 많은 분야의 사출성형에 적용되고 있다.This insert injection method is used to integrally insert inserts such as metal, glass, and plastic without additional processing to injection molded products, and is applicable to injection molding in many fields because it can reduce the number of parts and manufacturing labor. .

그런데, 실제 사출성형공정에 있어 인서트(1)는 용융되어 압출되는 고온의 수지(2)와는 달리 상온에 적재되어 있다가 금형(3)에 삽입되어 수지(2)와 접합되는 것이므로 인서트(1)를 가열하지 않고 금형(3)에 삽입하여 수지(2)를 압출성형하면 도 1에 도시한 바와 같이 상온의 인서트(1)와 고온의 용융 수지(2) 사이에 심한 온도차가 존재하여 이로 인해 상온의 인서트(1)와 고온의 용융 상태인 수지(2)가 접하는 부분에서 용융 수지(2)는 급속히 냉각되고, 냉각된 수지(4)는 냉각되지 않은 부분의 수지(2)로부터 열팽창에 의한 열응력을 받아 수축되면서 도 2와 같이 인서트(1)와 수지(2)의 접합면이 완전히 밀착되지 않고 틈새(5)가 발생되며, 이러한 틈새(5)로 이물질이 들어가 변형될 수 있고, 심하게는 인서트(1)가 수지(2)로부터 이탈되는 현상이 발생되는 문제가 있었다.However, in the actual injection molding process, unlike the high-temperature resin 2 that is melted and extruded, the insert 1 is loaded at room temperature and then inserted into the mold 3 to be bonded to the resin 2, thereby inserting the insert 1. When the resin 2 is extruded by inserting it into the mold 3 without heating, as shown in FIG. 1, there is a severe temperature difference between the insert 1 at room temperature and the molten resin 2 at high temperature. The molten resin 2 is rapidly cooled at the portion where the insert 1 of the resin 1 is in contact with the high-temperature molten resin 2, and the cooled resin 4 is heated by thermal expansion from the resin 2 at the uncooled portion. As a result of shrinkage under stress, as shown in FIG. 2, the joint surface of the insert 1 and the resin 2 is not completely in contact with each other, and a gap 5 is generated, and foreign matter may enter and deform into the gap 5. There is a problem that the phenomenon that the insert (1) is separated from the resin (2) occurs The.

본 발명은 이러한 점을 감안하여 제안된 것으로, 인서트를 금형에 삽입하기전 밀실로 된 방열상자에 전열기가 형성되어 있는 예열장치를 통과시켜 용융 수지의 온도에 근접되게 예열한 상태에서 사출금형에 삽입한 후 용융 수지를 주입함으로써 용융 수지와 인서트의 온도차이를 최소화하여 인서트 주위에서의 열응력을 제거하며, 이를 통해 용융 수지가 균일하게 냉각되게 하여 인서트와 용융 수지의 접합력을 향상시키는 인서트 예열을 이용한 사출방법 및 그 예열장치를 제공하고자 한 것이다.The present invention has been proposed in view of the above, and inserted into the injection mold in a state of preheating close to the temperature of the molten resin by passing through a preheater in which a heater is formed in a heat dissipation box of a closed chamber before inserting the insert into the mold. After the injection of molten resin, the thermal stress around the insert is removed by minimizing the temperature difference between the molten resin and the insert, and through the insert preheating, which improves the bonding strength between the insert and the molten resin by allowing the molten resin to be uniformly cooled. An injection method and a preheating apparatus thereof are provided.

도 1은 종래 인서트 사출공정시 인서트와 수지의 작용설명도.1 is a view illustrating the operation of the insert and the resin in the conventional insert injection process.

도 2는 종래 인서트 사출 후 인서트와 수지의 접합상태도.Figure 2 is a state of bonding of the insert and the resin after the conventional insert injection.

도 3은 본 발명에 따른 인서트 사출공정도.Figure 3 is an insert injection process according to the present invention.

도 4는 본 발명에 따른 인서트 예열장치의 구성도.4 is a block diagram of an insert preheating apparatus according to the present invention.

도 5는 본 발명에 따른 인서트 사출후 인서트와 수지의 접합상태도.Figure 5 is a joint state of the insert and the resin after the insert injection according to the present invention.

*** 도면의 주요부분에 대한 부호설명 ****** Explanation of main parts of drawing ***

1 : 인서트 2 : 수지1: Insert 2: Resin

3 : 금형 101 : 방열상자3: mold 101: heat dissipation box

102 : 투입구 103 : 배출구102: inlet 103: outlet

104 : 이송롤 105 : 전열기104: feed roll 105: heater

이하, 본 발명을 첨부한 도면에 의하여 상세히 설명하면 다음과 같다.Hereinafter, described in detail by the accompanying drawings of the present invention.

본 발명은 도 3에 도시한 바와 같이 인서트(1)를 금형(3)에 삽입한 상태에서 금형에 용융된 수지(2)를 주입하여 인서트(1)가 일체로 삽입된 사출성형품을 한번의 공정으로 사출 성형할 때 인서트(1)를 용융된 수지(2)의 온도에 근접하게 예열하고, 상기 예열된 인서트(1)를 금형(3)에 삽입함과 동시에 용융된 수지(2)를 금형(3)에 주입하는 것으로, 이를 위해서는 인서트(1)를 예열하기 위한 장치가 필요하다.As shown in FIG. 3, the molten resin 2 is injected into the mold in the state in which the insert 1 is inserted into the mold 3. In the case of injection molding, the insert 1 is preheated close to the temperature of the molten resin 2, the preheated insert 1 is inserted into the mold 3, and the molten resin 2 is simultaneously inserted into the mold 3 3), a device for preheating the insert 1 is required for this purpose.

도 4는 본 발명에 따른 인서트 예열장치를 나타낸 것으로, 밀폐된 공간을 형성하는 방열상자(101)와, 인서트(1)를 투입하고 배출하기 위해 방열상자(101)에 형성된 투입구(102) 및 배출구(103)와, 투입구(102)에서부터 배출구(103)까지 인서트(1)를 연속적으로 이송하는 다수의 이송롤(104)과, 방열상자(101)의 내상부측에 인서트(1)의 이송방향을 따라 연속 형성되어 인서트(1)를 예열하는 전열기(105)로 구성된다.Figure 4 shows the insert preheating apparatus according to the present invention, the heat dissipation box 101 to form a sealed space, and the inlet 102 and the discharge port formed in the heat dissipation box 101 to insert and discharge the insert (1) (103), a plurality of feed rolls (104) for continuously feeding the insert (1) from the inlet (102) to the outlet (103), and the conveying direction of the insert (1) on the inner upper side of the heat dissipation box (101) It consists of a heater 105 formed continuously along the preheating of the insert (1).

이때, 도시하지는 않았지만 인서트 예열장치의 투입구(102) 및 배출구(103) 외측에는 인서트(1)를 이송하기 위한 컨베이어 벨트를 각각 구비할 수 있으며, 특히 인서트 예열장치의 배출구(103)를 통해 나오는 예열된 인서트(1)를 취출로봇이 파지하여 곧바로 인서트 사출에 적용할 수 있도록 배치함이 바람직하다.At this time, although not shown, a conveyor belt for transporting the insert 1 may be provided outside the inlet 102 and the outlet 103 of the insert preheater, and in particular, the preheater may be provided through the outlet 103 of the insert preheater. It is preferable to arrange the inserted insert 1 so that the extraction robot can be grasped and immediately applied to the insert injection.

이와 같이 구성된 인서트 예열장치를 사용하여 인서트(1)를 예열할 때에는 먼저, 그 방열상자(101)의 투입구(102)를 통해 인서트(1)를 하나씩 순차적으로 투입하게 되고, 상기 투입된 인서트(1)가 이송롤(104)에 의해 순차적으로 방열상자(101)의 내부를 이동하게 되며, 이러한 이동과정에서 방열상자(101)의 내상부측에 인서트(1)의 이송방향을 따라 연속 형성되어 있는 전열기(105)로부터 열이 인서트(1)로 전달되어 인서트(1)가 어느 정도의 온도범위로 예열되며, 상기 예열된 인서트(1)는 이송롤(104)의 지속적인 롤링작용으로 배출구(103)를 통해 빠져나옴과 동시에 취출로봇에 의해 파지되어 금형(3)에 안착될 수 있다.When the insert 1 is preheated using the insert preheating device configured as described above, the insert 1 is sequentially introduced one by one through the inlet 102 of the heat dissipation box 101, and the inserted insert 1 Is moved to the inside of the heat dissipation box 101 in sequence by the transfer roll 104, the heater is continuously formed along the conveying direction of the insert (1) on the inner upper side of the heat dissipation box 101 in this movement process Heat is transmitted from 105 to the insert 1 so that the insert 1 is preheated to a certain temperature range, and the preheated insert 1 is configured to open the outlet 103 by the continuous rolling action of the feed roll 104. At the same time as it exits through it can be gripped by the takeout robot and seated in the mold (3).

그런데, 예열된 인서트(1)가 공기와 대류하게 되면 열기를 빼앗겨 온도가 낮아지게 되므로 온도가 낮아지기 전에 인서트 사출공정에 들어가야 되며, 따라서 인서트(1)가 금형(3)에 장착됨과 동시에 금형(3)을 닫고 용융 수지(2)를 주입하게 되는 것이다.However, when the preheated insert 1 is convection with air, the heat is deprived and the temperature is lowered. Therefore, the insert injection process must be entered before the temperature is lowered. ) And the molten resin (2) is injected.

이때, 인서트(1)를 예열하는 온도범위는 인서트(1)의 크기, 재질, 적용분야, 수지(2)의 종류, 수지(2)의 용융점 등 다양한 변수에 따라 결정해야 하며, 인서트(1)를 예열하더라도 용융 수지(2)의 온도보다는 낮을 수밖에 없지만 최대한 용융 수지(2)의 온도에 근접하도록 함이 바람직하다.At this time, the temperature range for preheating the insert 1 should be determined according to various variables such as the size of the insert 1, the material, the application field, the type of the resin 2, the melting point of the resin 2, and the insert 1 Although preheating is inevitably lower than the temperature of the molten resin 2, it is preferable to bring the temperature of the molten resin 2 as close as possible.

상기와 같이 인서트(1)를 예열한 상태로 인서트 사출공정을 수행하게 되면 인서트(1)와 용융 수지(2) 사이의 온도차가 최소화될 수 있음은 자명하며, 이에 따라 인서트(1)와의 접촉면에서 용융 수지(2)는 급속히 냉각되지 않고 타부위의 용융 수지(2)와 같이 균일하게 냉각되어 열팽창에 의한 열응력이 발생되지 않고 도 5와 같이 인서트(1)와 수지(2)의 접합면 사이가 밀착될 수 있는 것이다.When the insert injection process is performed while the insert 1 is preheated as described above, it is obvious that the temperature difference between the insert 1 and the molten resin 2 may be minimized, and thus, at the contact surface with the insert 1. The molten resin 2 is not rapidly cooled and is uniformly cooled like the molten resin 2 at the other part, so that thermal stress due to thermal expansion does not occur, and as shown in FIG. 5, between the joining surface of the insert 1 and the resin 2. Can be adhered to.

이상에서 설명한 바와 같이, 본 발명은 인서트를 금형에 삽입하기 전에 용융 수지의 온도에 최대한 근접하게 예열하여 이를 사출금형에 삽입한 후 용융 수지를 주입하는 것이므로 용융 수지와 인서트의 온도차이가 최소화되어 인서트와 수지의 접합면에서의 수지 급냉각이 발생되지 않고 타부위의 수지와 같이 균일하게 냉각되어 인서트와 수지의 접합력이 강화될 수 있음은 물론 수지가 인서트와 긴밀히 접합될 수 있으며, 이에 따라 제품의 수명이 연장되고 신뢰성을 향상시킬 수 있는 매우 유용한 효과가 있는 것이다.As described above, the present invention is to insert the molten resin after preheating as close as possible to the temperature of the molten resin before inserting the insert into the mold to insert it into the injection mold, thereby minimizing the temperature difference between the molten resin and the insert The rapid quenching of the resin at the joint surface of the resin and the resin is not generated, and the resin is uniformly cooled like the resin at the other part, thereby enhancing the bonding force between the insert and the resin, and the resin can be closely bonded to the insert. There is a very useful effect that can extend the life and improve the reliability.

Claims (2)

인서트를 금형에 삽입한 상태에서 상기 금형에 용융된 수지를 주입하여 상기 인서트가 일체로 삽입된 사출성형품을 한번의 공정으로 사출 성형하는 인서트 사출방법에 있어서,In the insert injection method of injecting the molten resin into the mold in the state where the insert is inserted into the mold by injection molding the injection molded article inserted into the insert in one step, 상기 인서트를 상기 용융된 수지의 온도에 근접하게 예열하고, 상기 예열된 인서트를 상기 금형에 삽입함과 동시에 상기 용융된 수지를 주입하는 것을 특징으로 하는 인서트 예열을 이용한 사출방법.And inserting the preheated insert into the mold and injecting the molten resin at the same time as the insert is preheated close to the temperature of the molten resin. 인서트를 금형에 삽입하고 용융된 수지를 주입하여 상기 인서트가 일체로 삽입된 사출성형품을 한번의 공정으로 사출함에 있어서,In inserting the insert into the mold and injecting the molten resin to inject the injection molded article inserted into the insert in one step, 밀폐된 공간을 형성하는 방열상자;Heat dissipation box to form a closed space; 상기 인서트를 투입하고 배출하기 위해 상기 방열상자에 형성된 투입구와 배출구;An inlet and outlet formed in the heat dissipation box for injecting and discharging the insert; 상기 투입구에서부터 상기 배출구까지 상기 인서트를 연속적으로 이송하는 다수의 이송롤; 및A plurality of feed rolls for continuously feeding the insert from the inlet to the outlet; And 상기 방열상자의 내상부측에 상기 인서트의 이송방향을 따라 연속 형성되어 상기 인서트를 예열하는 전열기를 포함하여서 된 것을 특징으로 하는 인서트 예열장치.Insert preheating device characterized in that it comprises a heater for continuously preheating the insert is formed in the inner upper side of the heat dissipation box in the conveying direction of the insert.
KR1020020027508A 2002-05-17 2002-05-17 Injection method using insert preheating and that preheating device KR20030089337A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100894699B1 (en) * 2008-12-12 2009-04-24 최성운 Manufacturing method of acrylic panel with solid body built-in and acrylic panel made by same method
KR100940361B1 (en) * 2008-05-08 2010-02-04 주식회사 에이 씨 에스 Insert molding apparatus
KR101890577B1 (en) * 2018-04-03 2018-08-23 디엘피주식회사 Apparatus for maintaining temperature

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04265719A (en) * 1991-02-20 1992-09-21 Aisan Ind Co Ltd Insert molding method and apparatus
JPH10180797A (en) * 1996-12-26 1998-07-07 Canon Inc Method and apparatus for molding insert molded article
KR100351944B1 (en) * 2000-09-25 2002-09-12 주식회사 대영초음파 Heat inserting apparatus for plastics
KR20030034370A (en) * 2001-10-23 2003-05-09 재영솔루텍 주식회사 Manufacturing-method for Injection-molding with Insert-parts and Device Thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04265719A (en) * 1991-02-20 1992-09-21 Aisan Ind Co Ltd Insert molding method and apparatus
JPH10180797A (en) * 1996-12-26 1998-07-07 Canon Inc Method and apparatus for molding insert molded article
KR100351944B1 (en) * 2000-09-25 2002-09-12 주식회사 대영초음파 Heat inserting apparatus for plastics
KR20030034370A (en) * 2001-10-23 2003-05-09 재영솔루텍 주식회사 Manufacturing-method for Injection-molding with Insert-parts and Device Thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100940361B1 (en) * 2008-05-08 2010-02-04 주식회사 에이 씨 에스 Insert molding apparatus
KR100894699B1 (en) * 2008-12-12 2009-04-24 최성운 Manufacturing method of acrylic panel with solid body built-in and acrylic panel made by same method
KR101890577B1 (en) * 2018-04-03 2018-08-23 디엘피주식회사 Apparatus for maintaining temperature

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