KR20090056368A - Mold for multi injection - Google Patents

Mold for multi injection Download PDF

Info

Publication number
KR20090056368A
KR20090056368A KR1020070123495A KR20070123495A KR20090056368A KR 20090056368 A KR20090056368 A KR 20090056368A KR 1020070123495 A KR1020070123495 A KR 1020070123495A KR 20070123495 A KR20070123495 A KR 20070123495A KR 20090056368 A KR20090056368 A KR 20090056368A
Authority
KR
South Korea
Prior art keywords
injection
mold
primary
molding
molded product
Prior art date
Application number
KR1020070123495A
Other languages
Korean (ko)
Inventor
이동율
송준규
Original Assignee
삼성전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to KR1020070123495A priority Critical patent/KR20090056368A/en
Publication of KR20090056368A publication Critical patent/KR20090056368A/en

Links

Images

Classifications

    • 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
    • B29C45/03—Injection moulding apparatus
    • B29C45/12—Injection moulding apparatus using two or more fixed moulds, e.g. in tandem
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1615—The materials being injected at different moulding stations
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C2045/1687—Making multilayered or multicoloured articles preventing leakage of second injected material from the mould cavity

Landscapes

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

Abstract

A mold for multi injection is provided to obtain intended shape by forming a blocking part protruded in order to form a closed surface with a first injection molded product, and thus blocking a second injection molded product from running over interface between the first injection molded product and the second injection molded product. A mold for multi injection comprises a first mold injection-molding a followed injection molded product and a second mold injection-molding a followed injection molded product into the following injection molded product. The second mold is equipped with a blocking part(21a) which prevents a following injection molded product in case of a following injection molding process from running over the interface with a followed injection molded product and thus entering into the followed injection molded product.

Description

다중사출금형{Mold for multi injection}Mold for multi injection

본 발명은 다중사출금형에 관한 것으로, 더욱 상세하게는 먼저 사출된 선행사출물이 냉각에 의해 수축되는 경우에도 후행 사출시 후행수지가 선행사출된 수지의 분할면을 넘지 않도록 개선한 다중사출금형에 관한 것이다.The present invention relates to a multi-injection mold, and more particularly, to a multi-injection mold improved in such a way that the trailing resin does not exceed the divided surface of the pre-injected resin during the post-injection even when the pre-injected first injection is shrunk by cooling. will be.

일반적으로 사출금형은 플라스틱 제품을 생산하기 위한 것으로, 사출성형은 고온으로 용융된 재료를 높은 압력에 의해 사출금형내로 충진하여 금형의 내부 형상에 따라 제품을 생산하게 된다.In general, the injection mold is to produce a plastic product, the injection molding is to fill the molten material at a high temperature into the injection mold by a high pressure to produce a product according to the internal shape of the mold.

최근에는 복합적인 재료가 일체로 사출될 수 있도록 선행사출된 사출물에 이종재질을 재차 사출하는 방식인 다중사출공정이 점차 확산되는 추세이다.Recently, the multi-injection process, which is a method of injecting heterogeneous materials again into the pre-injected injection material so that the composite material can be integrally injected, is gradually spreading.

도 5는 종래의 이중사출금형에 의해 이중사출된 상태를 도시한 단면도이다.5 is a cross-sectional view showing a state in which the double injection by the conventional double injection mold.

도시된 바와 같이, 먼저 캐비티(1)와 1차코어(미도시)에 의해 형성되는 성형공간으로 1차사출이 이루어지고 이후 1차사출물(3)이 캐비티(1) 내에 수용된 상태에서 2차코어(2)와 1차사출물(3)에 의해 형성되는 성형공간으로 2차사출이 이루어지게 된다.As shown, first injection into the molding space formed by the cavity 1 and the primary core (not shown), and then the secondary core in the state that the primary injection 3 is accommodated in the cavity 1 The secondary injection into the molding space formed by (2) and the primary injection (3) is made.

그러나 종래의 다중 사출금형에 의하면 다음과 같은 문제점이 있었다.However, according to the conventional multiple injection mold has the following problems.

캐비티(1)와 1차코어에 의한 1차사출물(3)은 냉각과정을 거쳐 고화되면서 수축하게 되는데, 이러한 1차사출후 냉각과정에서의 수축에 의해 2차사출시 1차사출물(3)과 2차사출물(4)을 형성하기 위한 2차코어(2)사이에 1차사출물(3)의 수축량만큼의 틈새가 형성되고 이에 따라 2차 사출시 이 틈새를 통해 2차사출을 위하여 용융된 수지가 1차사출물(3)과의 경계선을 넘어 2차사출물(4)과의 경계가 불규칙하게 형성하게 되면서 사출물의 외관을 손상시키게 되는 문제점이 있었다.The primary injection (3) by the cavity (1) and the primary core is contracted while solidifying through the cooling process, the primary injection (3) and 2 during the second injection by the shrinkage in the cooling process after the primary injection A gap is formed between the secondary cores 2 for forming the secondary injection 4 as much as the amount of shrinkage of the primary injection 3, so that the resin melted for secondary injection through the gap during the secondary injection is formed. As the boundary between the secondary injections 4 is irregularly formed beyond the boundary with the primary injections 3, there is a problem of damaging the appearance of the injections.

본 발명은 이러한 문제점을 해결하기 위한 것으로, 본 발명의 목적은 먼저 사출된 선행사출물이 냉각과정에서 수축되는 경우에도 이후에 후행사출과정에서 용융된 상태의 수지가 1차사출물과 2차사출물사이의 경계선을 넘는 것이 방지되는 다중사출금형을 제공하는데 있다.The present invention is to solve such a problem, an object of the present invention is that the resin in the molten state in the subsequent injection process after the first injection molded injection molding shrinks in the cooling process thereafter between the first injection and the second injection It is to provide a multi-injection mold that prevents crossing the boundary line.

본 발명은, 선행사출물을 사출하기 위한 제1금형과, 상기 선행사출물에 후행사출물을 사출하기 위한 제2금형을 포함하는 다중사출금형에 있어서,The present invention, in the multi-injection mold comprising a first mold for injecting the preceding injection, and a second mold for injecting the following injection into the preceding injection,

상기 제2금형에는 후행사출시 상기 후행사출물이 상기 선행사출물과의 경계면을 넘어 상기 선행사출물쪽으로 유입되는 것을 방지하는 차단부가 형성된 것을 특징으로 한다.The second mold is characterized in that a blocking portion is formed to prevent the trailing injection from flowing into the preceding injection over the boundary with the preceding injection during the subsequent injection.

상기 차단부는 상기 선행사출물의 수축에 의해 상기 선행사출물과 상기 제2 금형사이에 틈새가 형성되는 것을 방지하도록 상기 제2금형에서 상기 선행사출물과 후행사출물이 경계면를 형성하는 단부를 성형하는 위치에 형성된 것을 특징으로 한다.The blocking part is formed at a position to form an end portion forming the boundary between the preceding injection molding and the subsequent injection molding in the second mold to prevent a gap between the preceding injection molding and the second mold due to shrinkage of the preceding injection molding. It features.

상기 차단부는 선행사출후 수축된 상태의 상기 선행사출물과 접촉될 수 있도록 상기 제1금형에서 대응되는 부분보다 성형공간쪽으로 돌출형성된 것을 특징으로 한다.The blocking part may be formed to protrude toward a molding space rather than a corresponding portion of the first mold so as to be in contact with the preliminary injection product in a contracted state after the preliminary injection.

상기 차단부는 상기 선행사출물의 수축량만큼 상기 성형공간쪽으로 돌출형성된 것을 특징으로 한다.The blocking part may be formed to protrude toward the molding space by the amount of shrinkage of the preceding injection.

본 발명에 따른 다중사출금형은 선행사출물을 사출하기 위한 제1금형과, 상기 선행사출물에 후행사출물을 사출하기 위한 제2금형을 포함하며,The multi-injection mold according to the present invention includes a first mold for injecting the preceding injection, and a second mold for injecting the following injection into the preceding injection,

상기 제2금형은 후행사출시 상기 후행사출물이 상기 선행사출물과의 경계면을 넘어 상기 선행사출물쪽으로 유입되는 것을 방지하도록 상기 선행사출물과 후행사출물이 경계면를 형성하는 단부에서 선행사출후 수축된 상태의 상기 선행사출물과 접촉되는 차단부를 포함한다. The second mold is the preceding mold in the contracted state after the preliminary injection at the end forming the interface so that the preliminary injection and the following injection forming the interface to prevent the trailing injection from entering the preliminary injection over the boundary with the preliminary injection And a shield in contact with the injection molding.

본 발명에 의하면, 2차금형에는 1차사출물과 밀착면을 형성하기 위하여 돌출형성된 차단부가 형성된다. 따라서, 선행사출 후 1차사출물이 수축되더라도 2차사출물이 1차사출물과 2차사출물사이의 경계를 넘지 않도록 차단되어 상기 경계가 그대로 유지되며 원하는 형상을 얻을 수 있게 된다.According to the present invention, the secondary mold is formed with a protruding blocking portion to form a contact surface with the primary injection. Therefore, even if the primary injection is shrunk after the preliminary injection, the secondary injection is blocked so as not to cross the boundary between the primary injection and the secondary injection so that the boundary is maintained as it is and the desired shape can be obtained.

본 발명의 일 실시예에 따른 다중사출금형과 그에 따른 사출과정을 첨부한 도면을 참조로 하여 상세히 살펴본다.With reference to the accompanying drawings, the multi-injection mold and the injection process according to an embodiment of the present invention will be described in detail.

본 발명에 따른 다중사출금형은 1차사출을 위한 1차금형과, 1차사출후 재차 사출하기 위한 2차금형을 포함하여 이루어지는데, 먼저 1차금형과 그에 의한 사출물에 대하여 살펴본다.The multi-injection mold according to the present invention comprises a primary mold for the primary injection, and a secondary mold for injection again after the primary injection. First, the primary mold and the injection product thereof will be described.

1차금형은 오목한 형상을 포함하여 1차적인 성형공간을 형성하는 캐비티(10)와, 상기 캐비티(10)와 한 쌍으로 구성되며 캐비티(10)에 의해 1차적으로 형성된 성형공간을 한정하도록 볼록하게 돌출된 형상을 포함하는 1차코어(20)를 포함하여 이루어지고, 이러한 캐비티(10)와 1차코어(20)는 분할면(10a)을 경계로 하여 결합되어 그 내부에 형성되는 성형공간(100)이 형성된다.The primary mold includes a cavity 10 forming a primary molding space including a concave shape, and a pair of the cavity 10 and convex to define a molding space primarily formed by the cavity 10. It comprises a primary core 20 including a protruding shape, the cavity 10 and the primary core 20 is coupled to the partition surface (10a) as a boundary formed in the molding space 100 is formed.

이러한 성형공간(100)으로는 용융상태의 수지가 고압으로 주입되고 이후 수지는 소정의 냉각과정을 거치면서 고화되어 최종적인 1차사출물(30)을 형성하게 된다.The molten resin is injected into the molding space 100 at a high pressure, and then the resin is solidified through a predetermined cooling process to form a final primary injection product 30.

도 2에 도시된 바와 같이 1차사출된 사출물(30)은 냉각에 의한 고화과정을 거치면서 사출된 수지 고유의 수축률에 따라 수축되며 냉각과정이 모두 끝나면 1차코어(20)는 캐비티(10)로부터 분리되게 되고 사출된 1차사출물(30)은 캐비티(10)측에 계속 남아 있게된다.As shown in FIG. 2, the first injection molded product 30 is contracted according to the inherent shrinkage of the injected resin while undergoing a solidification process by cooling, and after the cooling process is completed, the primary core 20 is the cavity 10. The primary injection product 30 which is to be separated from the injection molding 30 remains on the cavity 10 side.

도 3은 2차사출과정을 나타낸 것으로, 2차금형은 1차금형과 공용되는 캐비티(10)와, 이 캐비티(10)와 분할면(10a)을 경계로 하여 결합되어 내부에 2차사출을 위한 성형공간을 형성하는 2차코어(21)를 포함한다.Figure 3 shows a secondary injection process, the secondary mold is coupled to the cavity 10 and the cavity 10 and the partition surface 10a shared with the primary mold, the secondary injection therein It comprises a secondary core 21 for forming a molding space for.

2차코어(21)는 1차코어(20)와 마찬가지로 성형공간 내부를 향하여 돌출된 형상을 포함하고 있으며, 캐비티(10)와 밀착되는 분할면(10a)의 크기와 위치는 동일하다. 다만 2차코어(21)는 1차코어(20)에 비하여 성형공간 내부를 향하여 돌출된 부위의 크기가 작아 캐비티(10)와 곁합된 상태에서 먼저 사출된 후 캐비티(10)에 잔류하는 1차사출물(30)과 함께 2차사출을 위한 성형공간을 형성한다.Like the primary core 20, the secondary core 21 includes a shape protruding toward the inside of the molding space, and the size and position of the split surface 10a closely contacting the cavity 10 are the same. However, the secondary core 21 is smaller than the size of the protruding portion toward the inside of the molding space in comparison with the primary core 20, so that the secondary core 21 is first injected in the state where it is joined with the cavity 10 and then remains in the cavity 10. Together with the injection molding 30, a molding space for secondary injection is formed.

이 성형공간에는 캐비티(10)와 2차코어(21)가 결합되어 분할면(10a)이 폐쇄된 상태에서 소정의 주입단계를 거쳐 2차사출이 이루어진다.In this molding space, the cavity 10 and the secondary core 21 are coupled to each other, and the secondary injection is performed through a predetermined injection step in a state in which the dividing surface 10a is closed.

이러한 주입과정에서 2차사출에 사용되는 용융상태의 수지는 소정의 압력에 의해 주입되어 1차사출물(30)과 2차코어(21)에는 2차사출용 수지에 의한 성형압이 작용하게 된다.In this injection process, the resin in the molten state used for the secondary injection is injected by a predetermined pressure, and the molding pressure by the secondary injection resin acts on the primary injection product 30 and the secondary core 21.

이와 같이 2차수지의 사출과정에서 작용하는 성형압에 의해 2차사출을 위한 수지(40)가 1차사출물(30)과의 경계를 넘어 1차사출물(30)을 덮는 형태로 사출되는 것을 방지하기 위하여 2차코어(21)에 차단부(21a)가 형성된다.As such, the resin 40 for the secondary injection is prevented from being injected in the form of covering the primary injection 30 beyond the boundary with the primary injection 30 by the molding pressure acting in the injection process of the secondary resin. In order to do this, the blocking portion 21a is formed in the secondary core 21.

차단부(21a)는 도 4에 도시된 바와 같이, 1차사출물(30)과 2차사출물(40)사이의 경계에 형성되어 1차사출물(30)과 밀착되게 형성되어 2차사출물(40)을 형성하는 사출수지가 1차사출물(30)과의 경계를 넘지 않도록 수지유입을 차단한다.As shown in FIG. 4, the blocking part 21a is formed at a boundary between the primary injection product 30 and the secondary injection product 40 and is formed to be in close contact with the primary injection product 30. Injection resin to form a block the resin inflow so as not to cross the boundary with the primary injection (30).

한편, 1차사출물(30)에 발생하는 수축은 가로방향 및 세로방향을 포함하여 각 방향으로 발생하며, 수축량은 수지 고유의 수축률과 길이의 곱을 표현될 수 있다. 따라서, 도 4에서는 1차사출물(30)의 세로방향으로는 a로 표시될 수 있고 가로방향의 수축량은 b로 표시될 수 있다.On the other hand, the shrinkage occurring in the primary injection 30 occurs in each direction, including the transverse direction and the longitudinal direction, the amount of shrinkage can be expressed by the product of the inherent shrinkage and length. Therefore, in FIG. 4, the longitudinal direction of the primary injection product 30 may be represented by a, and the amount of shrinkage in the transverse direction may be represented by b.

차단부(21a)는 2차사출단계에서 1차사출물(30)에서 2차사출물(40)과의 경계를 형성하는 단부(30a)와 접촉면을 형성할 수 있도록 돌출된 구조로 형성된다.The blocking part 21a is formed in a protruding structure so as to form a contact surface with the end 30a forming a boundary with the secondary injection 40 in the primary injection 30 in the secondary injection step.

따라서, 차단부(21a(는 도시된 바와 같이 1차사출물(30)에서 경계를 형성하는 단부(30a)가 세로방향으로 수축되는 거리(a)만큼 돌출된 구조로 형성된다. 즉, 도 4에서와 같이 1차코어(20)에서 1차사출물(30)과 2차사출물(40)의 경계를 형성할 단부를 형성하는 부분과 2차코어(21)에서 이에 대응하는 부분은 단부가 세로방향으로 수축되는 거리(a)만큼 높이차이를 갖도록 형성된다. 도시된 실시예에서는 차단부(21a)는 경계면(10a)으로부터 거리 a만큼 돌출되어 단차구조를 형성하는 것을 알 수 있다.Therefore, the blocking portion 21a (as shown) is formed in a structure protruding by a distance (a) in which the end portion 30a forming a boundary in the primary injection product 30 shrinks in the longitudinal direction. As shown in FIG. 5, the portion forming an end portion to form a boundary between the primary injection portion 30 and the secondary injection portion 40 in the primary core 20 and the portion corresponding to the portion in the secondary core 21 in the longitudinal direction thereof. It is formed to have a height difference by the contracted distance a. In the illustrated embodiment, it can be seen that the blocking portion 21a protrudes by a distance a from the boundary surface 10a to form a stepped structure.

이러한 차단부(21a)는 1차사출물(30)이 사출후 고화과정에서의 수축량을 2차코어(21)에 반영하여 2차코어(21)와 1차사출물(30)에서 2차사출물(40)과 경계를 형성하는 단부(30a)가 밀착되면서 2차사출시 2차코어(21)와 1차사출물(30)사이에서 2차사출물(40)이 유입될 수 있는 공간이 형성되지 않도록 한다. 따라서, 2차사출물(40)의 성형압이 1차사출물(40)에 작용하면서 1차사출물(30)과 캐비티(10) 사이에 가로방향으로 이격된 거리(b)를 감소시켜 1차사출물(30)과 캐비티(10)가 밀착되도록 한다.The blocking portion 21a is a secondary injection (40) in the secondary core 21 and the primary injection 30 by reflecting the shrinkage in the solidification process after the primary injection 30 is injected into the secondary core 21 ) And the end portion 30a forming a boundary between the secondary core 21 and the primary injection portion 30 so as not to form a space in which the secondary injection portion 40 can be introduced. Therefore, while the molding pressure of the secondary injection 40 acts on the primary injection 40, the distance (b) spaced apart in the horizontal direction between the primary injection 30 and the cavity 10 is reduced to reduce the primary injection ( 30) and the cavity 10 to be in close contact.

이상의 실시예는 이중사출을 위한 금형에 대한 사출구조에 대하여 설명하였으나 본 발명은 이러한 이중사출을 위한 금형에 한정되는 것은 아니며 2차사출이상의 다중사출물을 형성하기 위한 다중사출금형에 있어 선행사출금형과 후행사출금형사이에도 동일하게 적용될 수 있는 것임을 밝혀둔다.The above embodiment has been described with respect to the injection structure for the mold for double injection, but the present invention is not limited to the mold for double injection, and in the multi-injection mold for forming a multi-injection of the secondary injection or more injection molding and Note that the same can be applied to trailing injection molds.

이하에는 이와 같이 구성된 본 발명에 따른 다중사출금형에 의해 사출되는 과정을 살펴본다. Hereinafter, look at the process of injection by the multi-injection mold according to the present invention configured as described above.

도 1에서와 같이 캐비티(10)와 1차코어(20)의 결합의 의한 성형공간으로 1차사출물(30)이 주입과정을 통해 유입된 후 소정의 냉각과정을 거쳐 고화된다.As shown in FIG. 1, the primary injection 30 is introduced into the molding space by the combination of the cavity 10 and the primary core 20, and then solidified through a predetermined cooling process.

1차사출물(30)이 고화되면 도 2에서와 같이 1차코어(20)의 분리가 이루어지며 이때 1차사출물(30)은 캐비티(10)에 그대로 남아 있는 상태에서 1차코어(20)는 2차코어(21)로 교체된다.When the primary injection 30 is solidified, the separation of the primary core 20 is performed as shown in FIG. 2, where the primary injection 30 remains in the cavity 10 and the primary core 20 remains intact. The secondary core 21 is replaced.

다음으로, 도 3에서와 같이 2차코어(21)가 캐비티(10)와 결합하여 1차사출물(30)과 2차코어(21)사이에 성형공간이 형성되고 이 성형공간으로 2차사출물(40)이 주입과정을 거쳐 사출되며 이때 2차코어(21)에 형성된 차단부(21a)에 의해 2차사출물(40)이 1차사출물(30)과의 경계를 넘지않도록 차단되어 본래의 경계가 그대도 유지되며 소정의 냉각과정을 거쳐 사출물이 완성된다.Next, as shown in FIG. 3, the secondary core 21 is combined with the cavity 10 to form a molding space between the primary injection material 30 and the secondary core 21, and the secondary injection material ( 40 is injected through the injection process, whereby the secondary injection 40 is blocked so as not to cross the boundary with the primary injection 30 by the blocking portion 21a formed in the secondary core 21. You are also maintained and the injection is completed through a predetermined cooling process.

도 1은 본 발명에 따른 다중사출금형에 의한 1차사출상태를 도시한 단면도이다.1 is a cross-sectional view showing a primary injection state by a multiple injection mold according to the present invention.

도 2는 1차사출후 1차코어가 분리된 상태를 보인 단면도이다.2 is a cross-sectional view showing a state in which the primary core is separated after the primary injection.

도 3은 2차코어에 의한 2차사출상태를 도시한 단면도이다.3 is a cross-sectional view showing a secondary injection state by the secondary core.

도 4는 도 3에서 차단부 부분을 확대하여 도시한 확대도이다.4 is an enlarged view illustrating an enlarged portion of the blocking part in FIG. 3.

도 5는 종래의 이중사출금형에 의해 이중사출된 상태를 도시한 단면도이다.5 is a cross-sectional view showing a state in which the double injection by the conventional double injection mold.

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

10 : 캐비티, 20 : 1차코어,10: cavity, 20: primary core,

21 : 2차코어, 21a : 차단부,21: secondary core, 21a: blocking part,

30 : 1차사출물, 40 : 2차사출물,30: primary injection, 40: secondary injection,

Claims (5)

선행사출물을 사출하기 위한 제1금형과, 상기 선행사출물에 후행사출물을 사출하기 위한 제2금형을 포함하는 다중사출금형에 있어서,In the multi-injection mold comprising a first mold for injecting a preceding injection, and a second mold for injecting a trailing injection into the preceding injection, 상기 제2금형에는 후행사출시 상기 후행사출물이 상기 선행사출물과의 경계면을 넘어 상기 선행사출물쪽으로 유입되는 것을 방지하는 차단부가 형성된 것을 특징으로 하는 다중사출금형. The second mold is a multi-injection mold, characterized in that the blocking portion to prevent the trailing injection from flowing into the preceding injection when crossing the boundary with the preceding injection is formed. 제1항에 있어서, 상기 차단부는 상기 선행사출물의 수축에 의해 상기 선행사출물과 상기 제2금형사이에 틈새가 형성되는 것을 방지하도록 상기 제2금형에서 상기 선행사출물과 후행사출물이 경계면를 형성하는 단부를 성형하는 위치에 형성된 것을 특징으로 하는 다중사출금형.The method of claim 1, wherein the blocking portion is formed in the second mold to prevent the gap between the preceding injection and the second mold is formed by the shrinkage of the preceding injection portion in the second mold to the end forming an interface Multi-injection mold, characterized in that formed in the molding position. 제2항에 있어서, 상기 차단부는 선행사출후 수축된 상태의 상기 선행사출물과 접촉될 수 있도록 상기 제1금형에서 대응되는 부분보다 성형공간쪽으로 돌출형성된 것을 특징으로 하는 다중사출금형.The multiple injection mold of claim 2, wherein the blocking part is formed to protrude toward a molding space rather than a corresponding portion of the first mold so as to be in contact with the preliminary injection product in a contracted state after the preliminary injection. 제3항에 있어서, 상기 차단부는 상기 선행사출물의 수축량만큼 상기 성형공간쪽으로 돌출형성된 것을 특징으로 하는 다중사출금형.The multiple injection mold of claim 3, wherein the blocking part protrudes toward the molding space by the amount of shrinkage of the preceding injection. 선행사출물을 사출하기 위한 제1금형과, 상기 선행사출물에 후행사출물을 사출하기 위한 제2금형을 포함하며,A first mold for injecting a preceding injection, and a second mold for injecting a subsequent injection into the preceding injection, 상기 제2금형은 후행사출시 상기 후행사출물이 상기 선행사출물과의 경계면을 넘어 상기 선행사출물쪽으로 유입되는 것을 방지하도록 상기 선행사출물과 후행사출물이 경계면를 형성하는 단부에서 선행사출후 수축된 상태의 상기 선행사출물과 접촉되는 차단부를 포함하는 다중사출금형. The second mold is the preceding mold in the contracted state after the preliminary injection at the end forming the interface so that the preliminary injection and the following injection forming the interface to prevent the trailing injection from entering the preliminary injection over the boundary with the preliminary injection Multiple injection mold comprising a blocking portion in contact with the injection molding.
KR1020070123495A 2007-11-30 2007-11-30 Mold for multi injection KR20090056368A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070123495A KR20090056368A (en) 2007-11-30 2007-11-30 Mold for multi injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070123495A KR20090056368A (en) 2007-11-30 2007-11-30 Mold for multi injection

Publications (1)

Publication Number Publication Date
KR20090056368A true KR20090056368A (en) 2009-06-03

Family

ID=40987782

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070123495A KR20090056368A (en) 2007-11-30 2007-11-30 Mold for multi injection

Country Status (1)

Country Link
KR (1) KR20090056368A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106003568A (en) * 2016-05-13 2016-10-12 郑州大学 Method for preparing self-reinforced polyethylene product with multiple uniform orientation layers by adopting injection molding technology

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106003568A (en) * 2016-05-13 2016-10-12 郑州大学 Method for preparing self-reinforced polyethylene product with multiple uniform orientation layers by adopting injection molding technology

Similar Documents

Publication Publication Date Title
JP6587855B2 (en) Injection molding method and mold
US20030201570A1 (en) Injection molding method, injection mold, resin-molded article, and insert resin component
JPS5976230A (en) Method of injection-molding plastic
KR101339032B1 (en) A double injection mould having sliding cores for reinforcing structural weak parts in a mould
JP4614812B2 (en) In-mold coating molding apparatus and in-mold coating molding method
JPH0684031B2 (en) Injection molding method
US20100237536A1 (en) Mold for in-mold coating and in-mold coating method
KR20090056368A (en) Mold for multi injection
US20220126538A1 (en) Injection molding method
CN103624935A (en) Mould for solving product surface shrinkage
KR101462417B1 (en) Injection mould having a dam structure around a cavity
JP6830982B2 (en) Manufacturing method of two-color molded products
JPS6357210B2 (en)
KR100654716B1 (en) Pannel blow molding method and devece
US20080054528A1 (en) Material-feeding structure for a mold and casing fabrication method using the same structure
EP1916085A1 (en) Material-feeding structure for a mold and casing fabrication method using the same structure
KR101655335B1 (en) Injection molded lens
KR200194537Y1 (en) Cutting type runner gate structure for injection molding
KR100422648B1 (en) Parting lineless mould and method of manufacturing for the same
JPH10264202A (en) Production of composite synthetic resin molded product
EP0418279B1 (en) Reduction of required mold-cavity clamping force and control of injection-molded product wall-thickness
JPH11170306A (en) Injection mold
GB1133508A (en) Method and apparatus for manufacturing spectacle sidebars and sidebars obtained thereby
JPH09201840A (en) Injection molded product and its manufacture
JPS5917623Y2 (en) Mold gate for injection molding

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application