KR100248772B1 - An injection molder of jeting preventing with gas injection molding - Google Patents

An injection molder of jeting preventing with gas injection molding Download PDF

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Publication number
KR100248772B1
KR100248772B1 KR1019970054946A KR19970054946A KR100248772B1 KR 100248772 B1 KR100248772 B1 KR 100248772B1 KR 1019970054946 A KR1019970054946 A KR 1019970054946A KR 19970054946 A KR19970054946 A KR 19970054946A KR 100248772 B1 KR100248772 B1 KR 100248772B1
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South Korea
Prior art keywords
cavity
injection molding
injection
injected
gate
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KR1019970054946A
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Korean (ko)
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KR19990033561A (en
Inventor
이재권
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윤종용
삼성전자주식회사
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Priority to KR1019970054946A priority Critical patent/KR100248772B1/en
Priority to JP10298872A priority patent/JP3027148B2/en
Priority to ES009802197A priority patent/ES2149113B1/en
Priority to CN98123416A priority patent/CN1081120C/en
Publication of KR19990033561A publication Critical patent/KR19990033561A/en
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Publication of KR100248772B1 publication Critical patent/KR100248772B1/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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • 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
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B29C45/2708—Gates
    • 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
    • B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
    • B29C2045/0049—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity the injected material flowing against a mould cavity protruding part

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Abstract

본 발명에 의한 가스 사출성형시 제팅방지를 위한 사출금형은, 상원판과 하원판이 서로 결합되어 그 중앙에 캐버티가 형성되어 있고, 상기 캐버티의 일측에 가스 사출성형시 용융상태의 레진이 빠른속도로 캐버티에 분사되도록 게이트가 좁게 형성된 사출금형에 있어서, 상기 케버티에는 상기 게이트를 통해 캐버티내로 일방향 고속분사되는 용융상태의 레진이 게이트를 통과함과 동시에 캐버티로 주입되는 순간 정면 충돌에 의해 분사속도가 감소되면서 흐름이 다방향으로 분산되도록 돌기를 구비한 것을 특징으로 되어 있으므로, 사출성형후 사출제품의 표면에 생기는 제팅자욱에 의한 외관 불량을 미연에 방지할수 있는 것이다.Injection molding for preventing jetting during gas injection molding according to the present invention, the upper plate and the lower plate is coupled to each other, the cavity is formed in the center, the resin in the molten state during the gas injection molding on one side of the cavity In an injection mold in which a gate is narrowly formed so as to be injected into the cavity at a speed, the cavity has a frontal collision as soon as the molten resin, which is injected in one direction and rapidly injected into the cavity through the gate, is injected into the cavity at the same time. It is characterized by having a projection so that the flow is dispersed in a multi-direction while the injection speed is reduced by, it is possible to prevent appearance defects due to jetting on the surface of the injection molded product after injection molding.

Description

가스 사출성형시 제팅방지를 위한 사출금형Injection mold to prevent jetting during gas injection molding

본 발명은 가스 사출성형시 제팅(Jeting)방지를 위한 금형에 관한 것으로 더욱 상세하게는 가스 사출성형시 용융된 레진(Resin)이 사출금형의 게이트(Gate)를 통해 일방향으로 고속 분사될 때 발생되기 쉬운 제팅자욱에 의한 외관 불량을 미연에 방지하도록 한 가스 사출성형시 제팅방지를 위한 사출금형에 관한 것이다.The present invention relates to a mold for preventing jetting during gas injection molding, and more particularly, when molten resin is injected at a high speed in one direction through a gate of an injection mold during gas injection molding. The present invention relates to an injection mold for preventing jetting during gas injection molding to prevent appearance defects due to easy jetting.

종래의 의한 사출금형(10)은, 제1도에 도시한 바와 같이 상하 적층되게 결합되는 상원판(11) 및 하원판(12)으로 이루어져 있다.The injection mold 10 according to the related art includes a top plate 11 and a bottom plate 12 that are coupled to be stacked up and down as shown in FIG. 1.

이때, 상기 상원판(11)과 하원판(12)이 서로 접촉되는 내측면 중앙에는 캐버티(Cavity; 13)가 형성되어 있고, 상기 상원판(11)과 하원판(12)이 서로 접촉되는 일측단에는 가스 사출성형에 필요한 용융상태의 레진이 상기 캐버티(13)내에 흘러 들어가도록 런너(Runner; 14)가 형성되어 있으며, 상기 캐버티(13)와 런너(14)와의 사이에는 런너(14)를 통해 주입되는 용융상태의 레진이 빠른속도로 캐버티(13)에 분사되도록 게이트(15)가 좁게 형성되어 있다.In this case, a cavity 13 is formed at the center of the inner surface where the upper plate 11 and the lower plate 12 are in contact with each other, and the upper plate 11 and the lower plate 12 are in contact with each other. At one end, a runner 14 is formed so that the molten resin necessary for gas injection flows into the cavity 13, and a runner (between the cavity 13 and the runner 14) is formed. The gate 15 is narrowly formed so that the molten resin injected through the 14 is injected into the cavity 13 at a high speed.

이러한, 사출금형(10)에 의해 사출성형되는 사출제품(20)은 제2도에 도시한 바와 같이 공기조화기의 실내기에 있어서, 토출구를 통해 실내기의 외부로 토출되는 냉기류를 상하방향으로 풍량을 조절하도록 사용되는 상하풍향 조절용 블레이드 등을 예를 들 수 있다.As shown in FIG. 2, the injection molded product 20 injection-molded by the injection mold 10 has an air volume in the indoor unit of the air conditioner, for cooling the air flow discharged to the outside of the indoor unit through the discharge port in the vertical direction. And the like for example, a blade for adjusting up and down winds used to adjust.

즉, 상기 사출제품(20)은 상기 사출금형(10)에 의해 가스 사출성형후 일정한 두께를 유지하면서 무게를 감소시켜 재료비를 절감시키도록 내부에 공간이 형성되는 구조로 되어 있다.That is, the injection product 20 has a structure in which a space is formed to reduce the weight by reducing the weight while maintaining a constant thickness after the gas injection molding by the injection mold (10).

그러나, 상기한 바와 같이 구성된 사출금형(10)은 상원판(11)과 하원판(12)이 상하 적층되게 결합된 상태에서 그 일측에 형성된 좁은 게이트(15)를 통하여 캐버티(13)의 일방향으로 용융상태의 레진을 고속으로 분사시켜 사출제품(20)을 사출 성형하도록 되어 있으나, 이러한 사출성형방법은 좁은 게이트(15)를 통과하는 용융 상태의 레진의 분사속도를 조절하지 않을 경우, 이상흐름의 발생으로 인하여 사출 성형후 사출제품(20)의 표면에 제팅자욱이 생김에 따라 외관 불량을 초래한다는 문제점이 있었다.However, the injection mold 10 configured as described above has one direction of the cavity 13 through the narrow gate 15 formed at one side thereof in the state in which the upper plate 11 and the lower plate 12 are stacked to be stacked up and down. By injection of the molten resin at high speed to injection molding the injection molded product 20, this injection molding method, if the injection speed of the molten resin passing through the narrow gate 15 is not controlled, the abnormal flow Due to the occurrence of a jetting defect on the surface of the injection molded product 20 after injection molding, there was a problem that the appearance defects.

따라서, 본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 가스 사출성형시 게이트를 통해 캐버티로 주입되는 용융상태의 레진의 분사속도를 적절히 조절함과 동시에 다방향으로 분산되게 하여, 사출성형후 사출제품의 표면에 제팅자욱에 의한 외관 불량을 미연에 방지하도록 한 가스 사출 성형시 제팅방지를 위한 사출금형을 제공하는데 있다.Accordingly, the present invention has been made to solve the above problems, the object of the present invention is to control the injection speed of the resin in the molten state injected into the cavity through the gate at the time of gas injection molding in the multi-direction The present invention provides an injection mold for preventing jetting during gas injection molding, by dispersing, to prevent appearance defects caused by jetting on the surface of the injection molded product after injection molding.

상기와 같은 목적을 실현하기 위하여 이루어진 본 발명에 의한 가스 사출성형시 제팅방지를 위한 사출금형은, 상원판과 하원판이 서로 결합되어 그 중앙에 캐버티가 형성되어 있고, 상기 캐버티의 일측에 가스 사출성형시 용융상태의 레진이 빠른속도로 캐버티에 분사되도록 게이트가 좁게 형성된 사출금형에 있어서, 상기 캐버티에는 상기 게이트를 통해 캐버티내로 일방향 고속분사되는 용융상태의 레진이 게이트를 통과함과 동시에 캐버티로 주입되는 순간 정면 충돌에 의해 분사속도가 감소되면서 흐름이 다방향으로 분산되도록 돌기를 구비한 것을 특징으로 한다.Injection molding for preventing jetting during the gas injection molding according to the present invention made to achieve the above object, the upper and lower plates are combined with each other, the cavity is formed in the center, the gas on one side of the cavity In the injection mold in which the gate is narrowly formed so that the molten resin is injected into the cavity at a high speed during the injection molding, the cavity is passed through the gate of the molten resin that is injected in one direction at high speed into the cavity through the gate. At the same time, the injection speed is reduced by the frontal impact when injected into the cavity, characterized in that the projection is provided so that the flow is dispersed in multiple directions.

제1도는 종래의 의한 사출금형구조를 도시한 단면도.1 is a cross-sectional view showing a conventional injection mold structure.

제2도는 종래에 의한 사출금형에 의해 사출성형시 사출제품의 표면에 제팅자욱이 형성된 것을 도시한 사시도.Figure 2 is a perspective view showing that the jetting groove is formed on the surface of the injection molded product during the injection molding by a conventional injection mold.

제3도는 본 발명의 사출금형구조를 도시한 단면도.3 is a cross-sectional view showing an injection mold structure of the present invention.

제4도는 본 발명에 의한 사출금형의 하원판을 도시한 사시도이다.4 is a perspective view showing a lower plate of the injection mold according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

20 : 사출제품 40 : 사출금형20: injection product 40: injection mold

41 : 상원판 42 : 하원판41: Senate 42: House of Representatives

43 : 캐버티 44 : 런너43: cavity 44: runner

45 : 게이트 46 : 돌기45: gate 46: protrusion

이하, 본 발명의 일실시예에 관하여 첨부 도면을 참조하면서 상세히 설명한다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도면에서 종래의 구성과 동일한 구성에 대해서는 동일명칭 및 동일부호를 부여하고, 그에 대한 상세한 설명은 생략한다.In the drawings, the same components as those in the related art are denoted by the same names and the same reference numerals, and detailed description thereof will be omitted.

본 발명에 의한 사출금형(40)은, 제3도에 도시한 바와 같이 상원판(41)과 하워판(42)이 서로 접촉되는 내측면 중앙에 캐버티(43)가 형성되어 있고, 상기 상원판(41)과 하원판(42)이 서로 접촉되는 일측단에는 사출성형에 필요한 용융상태의 레진이 상기 캐버티(43)내에 흘러들어가도록 런너(44)가 형성되어있으며, 상기 캐버티(43)와 런너(44)와의 사이에는 런너(44)를 통해 주입되는 용융상태의 레진이 빠른속도로 캐버티(43)에 분사되도록 게이트(55)가 좁게 형성되어 있다.In the injection mold 40 according to the present invention, as shown in FIG. 3, the cavity 43 is formed at the center of the inner surface where the upper plate 41 and the lower plate 42 come into contact with each other. At one end of the plate 41 and the lower plate 42 in contact with each other, a runner 44 is formed so that the molten resin required for injection molding flows into the cavity 43, and the cavity 43 is formed. ), The gate 55 is narrowly formed so that the molten resin injected through the runner 44 is injected into the cavity 43 at a high speed.

이때, 상기 하원판(42)측 캐버티(43)의 일측에는 제4도에 도시한 바와 같이 상기 게이트(55)를 통해 캐버티(43)내로 일방향 고속분사되는 용융상태의 레진이 게이트(45)를 통과함과 동시에 캐버티(43)로 주입되는 순간 정면 충돌에 의해 적어도 두방향이상으로 흐름이 양분되어 분산되면서 분사속도가 적절히 조절되도록 게이트(55)로부터 일정거리를 두고 돌기(46)가 일체로 돌설되어 있다.At this time, one side of the cavity 43 side cavity 43 has a molten resin that is injected in one direction at a high speed into the cavity 43 through the gate 55 as shown in FIG. 4. At the same time when the injection is injected into the cavity 43, the flow is divided into at least two directions by the frontal collision, and the projection 46 is spaced from the gate 55 at a predetermined distance so that the injection speed is properly adjusted. It is in one piece.

즉, 상기 돌기(46)는 용융상태의 레진이 정면 충돌된후 속도가 감소되면서 좌우측으로 분산되어 상기 캐버티(43)내에 골고루 주입되도록 그 둘레가 원형으로 형성되어 있고, 그 상면은 상기 게이트(45)에서 분산되는 용융상태의 레진이 돌기(46)에 충돌된 후 속도가 감소되면서 상부측으로 분산되어 캐버티(43)내에 골고루 주입되도록 상기 상원판(41)에 형성된 캐버티(43)의 상면과 일정거리를 두고 접촉되지 않게 설치된다.That is, the protrusions 46 are formed in a circular shape so that the resin in the molten state is frontally collided and dispersed in left and right as the speed decreases and is evenly injected into the cavity 43. The upper surface of the cavity 43 formed in the upper plate 41 so that the resin in the molten state dispersed in 45 is impinged on the protrusion 46 and is dispersed in the upper side while being injected into the cavity 43 at a reduced speed. It is installed not to be contacted at a certain distance from the

다음에, 이와 같이 구성된 본 발명에 의한 작용 및 효과를 설명한다.Next, the operation and effect of the present invention configured as described above will be described.

제3도에 도시한 바와 같이, 사출금형(40)의 상원판(41)과 하원판(42)을 상하 적층되게 결합시킨 상태에서 이들 일측단에 형성된 런너(44)를 통하여 융용상태의 레진을 주입시키면, 이 용융상태의 레진은 좁게 형성된 게이트(45)에 의해 빠른 속도로 통과하면서 캐버티(43)내로 분사된다.As shown in FIG. 3, the resin in the molten state is formed through the runners 44 formed at one end of the upper mold plate 41 and the lower plate 42 of the injection mold 40 so as to be stacked up and down. When injected, this molten resin is injected into the cavity 43 while passing at a high speed by the narrowly formed gate 45.

이때, 게이트(45)에서 캐버티(43)로 고속분사되는 용융상태의 레진중 대부분은 게이트(45)로부터 일정거리를 두고 캐버티(43)내에 설치된 돌기(46)의 정면에 충돌되어 흐름이 감소 및 바뀜과 동시에 돌기(46)의 안내를 받아 좌우측으로 흐름이 양분되어 두방향으로 분산됨으로써 캐버티(43)내에 일정량 채워진다.At this time, most of the molten resin injected at high speed from the gate 45 to the cavity 43 collides with the front surface of the protrusion 46 installed in the cavity 43 at a predetermined distance from the gate 45 to flow therein. At the same time as the reduction and the change, the flow is divided into two directions by the guidance of the projections 46 and distributed in two directions, thereby filling a predetermined amount in the cavity 43.

또, 게이트(45)에서 캐버티(43)로 고속분사되는 용융상태의 레진중 일부는 상기 돌기(46)에 충돌되어 흐름이 감소 및 바뀌면서 돌기(46)의 상면과 캐비티(43)의 천정과의 사이에 형성된 일정틈새를 통하여 분산됨으로써 캐버티(43)내에 일정량 채워진다.In addition, some of the molten resin injected at high speed from the gate 45 to the cavity 43 collides with the protrusion 46 so that the flow is reduced and changed, and the top surface of the protrusion 46 and the ceiling of the cavity 43 A certain amount is filled in the cavity 43 by being dispersed through a predetermined gap formed between the gaps.

따라서, 게이트(45)를 통해 일방향으로 고속분사되는 용융상태의 레진은 캐버티(43)내에 주입되는 순간 캐버티(43)의 입구단에 돌설된 돌기(46)에 충돌되어 분사속도가 적절히 감소되면서 다방향으로 분산되어 캐버티내에 골고루 주입됨으로, 사출성형후 사출제품(20)의 표면에 이상흐름의 발생에 의해 생기는 제팅자욱에 의한 외관 불량을 미연에 방지할 수 있게 되는 것이다.Therefore, the molten resin injected at high speed in one direction through the gate 45 collides with the protrusion 46 protruding at the inlet end of the cavity 43 at the moment of being injected into the cavity 43, so that the injection speed is appropriately reduced. While being dispersed in multiple directions and evenly injected into the cavity, it is possible to prevent appearance defects due to jetting caused by the occurrence of abnormal flow on the surface of the injection molded product 20 after injection molding.

앞에서 설명한 바와 같이, 본 발명에 의한 가스 사출성형시 제팅방지를 위한 사출금형에 의하면, 사출성형시 게이트를 고속으로 통과하는 용융상태의 레진이 캐버티에 주입되는 순간 정면 충돌에 의해 분사속도가 적절히 감소되었다가 다방향으로 분산되면서 캐버티내에 골고루 주입되도록 캐버티의 입구단에 돌기를 형성한 구조로 되어 있기 때문에 사출성형후 사출제품의 표면에 생기는 제팅자욱에 의한 외관 불량을 미연에 방지할 수 있는 효과가 있다.As described above, according to the injection mold for preventing jetting during the gas injection molding according to the present invention, the injection speed is appropriately controlled by the frontal collision when the molten resin that passes through the gate at high speed during injection molding is injected into the cavity. As it has a structure in which protrusions are formed at the inlet end of the cavity so that it is reduced and dispersed in multiple directions and evenly injected into the cavity, it is possible to prevent appearance defects due to jetting on the surface of the injection molded product after injection molding. It has an effect.

Claims (1)

상원판(41)과 하원판(42)이 서로 결합되어 그 중앙에 형성되는 캐버티(43)와, 상기 캐버티(43)의 일측에 형성되어 가스 사출성형시 용융상태의 레진이 빠른속도로 캐버티(43)에 분사되게 하는 게이트(45)와, 캐버티(43)내의 일측에 돌설되는 돌기(46)를 구비한 사출금형에 있어서, 상기 돌기(46)는, 상기 캐버티(43)내에 대하여 상기 게이트(45)의 위치와 대응되는 일직선상에 근접되게 일체로 설치되며 또한 게이트(45)의 분사각도와 대응되는 둘레면이 원형으로 형성되면서 그 상면이 캐버티(43)의 천장과 접촉되지 않게 구성된 것을 특징으로 하는 가스 사출성형시 제팅방지를 위한 사출금형.The upper plate 41 and the lower plate 42 are coupled to each other, the cavity 43 formed at the center thereof, and formed in one side of the cavity 43, so that the resin in the molten state at the time of gas injection molding In the injection mold having a gate 45 to be injected into the cavity 43 and a protrusion 46 protruding to one side in the cavity 43, the protrusion 46 is the cavity 43. It is integrally installed in a straight line corresponding to the position of the gate 45 with respect to the inside, and the circumferential surface corresponding to the injection angle of the gate 45 is formed in a circular shape, and the upper surface thereof is connected to the ceiling of the cavity 43. Injection mold for preventing jetting during gas injection molding, characterized in that not configured to contact.
KR1019970054946A 1997-10-24 1997-10-24 An injection molder of jeting preventing with gas injection molding KR100248772B1 (en)

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KR1019970054946A KR100248772B1 (en) 1997-10-24 1997-10-24 An injection molder of jeting preventing with gas injection molding
JP10298872A JP3027148B2 (en) 1997-10-24 1998-10-20 Injection mold to prevent jetting during gas injection molding
ES009802197A ES2149113B1 (en) 1997-10-24 1998-10-21 MOLDING MACHINE WITH GAS INJECTION.
CN98123416A CN1081120C (en) 1997-10-24 1998-10-21 Gas injected molding machine

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CN1081120C (en) 2002-03-20
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