KR920007033B1 - Undercut treating device for injection molding article - Google Patents

Undercut treating device for injection molding article Download PDF

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Publication number
KR920007033B1
KR920007033B1 KR1019900006566A KR900006566A KR920007033B1 KR 920007033 B1 KR920007033 B1 KR 920007033B1 KR 1019900006566 A KR1019900006566 A KR 1019900006566A KR 900006566 A KR900006566 A KR 900006566A KR 920007033 B1 KR920007033 B1 KR 920007033B1
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South Korea
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arc
shaped
core
pinion
connecting arm
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KR1019900006566A
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Korean (ko)
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KR910019748A (en
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유헌중
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현대전자산업 주식회사
정몽헌
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Priority to KR1019900006566A priority Critical patent/KR920007033B1/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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles

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

Abstract

An under-cut treating device of an injection mould includes a pinion (12) inserted in a shaft and a rack (14) to be engaged with the pinion in between a stationary plate and a moveable plate. Circular arc shape space and guide groove concentric to the space are formed on the contacting surfaces of both the stationary and moveable plates. The circular arc shape core (5) inserted in the circular arc shape space is connected to the shaft of the pinion by a connecting arm (9). By using this device the performance of forming and removing tubular products or circular arc shape products in an injection moulding process comes to be efficient.

Description

사출금형의 원호형 코어 처리장치Arc-type core processing device of injection mold

제1도 내지 제4도는 본 고안에 의한 원호형코어 처리장치가 적용된 사출금형의 작동상태를 도시하는 것이다.1 to 4 show the operating state of the injection mold to which the arc core processing apparatus according to the present invention is applied.

제1도는 형폐(型閉) 상태 단면도이다.1 is a cross-sectional view of a mold closed state.

제2도 형개(型開) 상태 단면도이다.2 is a cross-sectional view of a mold opening state.

제3도는 제1도의 A-A선 단면도이다.3 is a cross-sectional view taken along the line A-A of FIG.

제4도는 제2도의 B-B선 단면도이다.4 is a cross-sectional view taken along the line B-B in FIG.

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

1 : 고정형판 2 : 가동형판1: fixed plate 2: movable plate

3, 4 : 원호형관부 5 : 원호형코어3, 4: arc-shaped tube part 5: arc-shaped core

6, 8 : 원호형안내홈 7 : 슬라이드가이드6, 8: arc-shaped guide groove 7: the slide guide

9 : 연결암 10 : 회전구동수단9: connection arm 10: rotation drive means

11 : 회전축 12 : 피니언11: axis of rotation 12: pinion

13 : 구동랙 14 : 랙부13 drive rack 14 rack portion

15 : 진퇴작동봉 16 : 연결코어15: Retraction operation rod 16: Connection core

17 : 연결부17 connection

본 발명은 사출금형의 언더커트 처리장치에 관한 것으로 특히, 원호형(圓弧形) 관형부(管形部)나 관체(管體)를 성형하기 위한 사출금형의 원호형코어 처리장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an undercut processing apparatus for injection molds, and more particularly, to an arc-shaped core processing apparatus for injection molds for forming arc-shaped tubular portions or tubular bodies. .

일반적으로 사출금형은 고정형판과 가동형판에 형성된 공간부에 수지를 주입함으로써 그 공간부와 일치하는 형상의 제품을 성형하며, 고정형판과 가동형판만으로써는 성형할 수 없는 소위 언더커트부를 가지는 제품을 성형함에 있어서는 고정형판 및 가동형판과는 별도의 언더커트 처리장치를 설치하여 형폐시에는 소정 언더커트부에 일치하는 위치로 전진하여 정위위시키고, 형개시에는 고정형판과 가동형판의 형개에 지장을 주지 않도록 형개에 앞서 먼저 후퇴시킴으로써 언더커트부나 제품을 손상시키지 않고 언더커트부를 처리할수 있도록 한 언더커트 처리장치가 사용되고 있다.In general, injection molds inject a resin into a space formed in the stationary plate and the movable plate to mold a product having a shape that matches the space, and form a product having a so-called undercut portion that cannot be formed only by the stationary plate and the movable plate. In the case, the undercut treatment device is installed separately from the fixed plate and the movable plate. When the mold is closed, it moves forward to the position corresponding to the predetermined undercut part and is positioned. The mold plate and the movable plate are not affected. In order to prevent the undercut portion or the product from being damaged by retreating before opening, the undercut treatment apparatus is used.

그러나, 이러한 종래의 각종 언더커트 처리장치는 대부분 고정형판과 가동형판의 형개, 폐 방향과 직교하거나 경사지게 형성되는 언더커트부에 처리에 적용되는 것일 뿐 원호형으로 만곡된 관형부를 가지는 제품이나 관체와 같은 제품의 성형에는 적용할 수 없는 실정이었다.However, the conventional various kinds of undercut treatment apparatuses are mainly applied to the processing of the undercut portion formed orthogonally or obliquely to the closed direction of the stationary plate and the movable plate, and have a product or a tube having a tubular portion curved in an arc shape. It was not applicable to the molding of the same product.

따라서, 본 발명은 이러한 종래의 실정을 감안하여 원호형관형부를 가지는 제품이나 관체와 같은 제품을 성형하는데 매우 효율적인 사출금형의 원호형코어 처리장치를 제공하려는 것이다.Accordingly, the present invention has been made in view of such a conventional situation to provide an arc-shaped core processing apparatus of an injection mold that is highly efficient for molding a product such as a product having an arc-shaped tubular portion or a tube.

이러한 본 발명의 목적은, 고정형판과 가동형판으로 된 것에 있어서, 상기 고정형판 및 가동형판에는 원형코어의 주연을 감싸는 반원형 단면의 원호형 공간부와 이와 동심원이 원호형안내홈을 형성하고, 상기 원호형코어에는 연결암을 그 회전중심으로 연장설치하여 회전구동수단에 연동연결하여서 된 것을 특징으로 하는 사출금형의 원호형코어 처리장치를 제공하는 것에 의하여 달성된다.The object of the present invention is that the stationary plate and the movable plate, the stationary plate and the movable plate is formed in a circular arc-shaped space portion and the concentric circle of the semi-circular cross-section surrounding the periphery of the circular core, the circular guide groove, The arc-shaped core is achieved by providing an arc-shaped core processing apparatus of an injection mold, characterized in that the connection arm is extended to the center of rotation thereof and connected to the rotation driving means.

상기 원호형코어를 회전진퇴작동시키는 회전구동수단은, 상기 원호형코어에 연결암의 회전중심에 고정되는 회전축에 공지의 피니언을 고정하고, 이 피니언에 맞물리는 랙부가 형성된 공지의 구동랙을 설치하여 진퇴작동봉에 연결한다.The rotary drive means for rotating and retracting the arc-shaped core is fixed to the arc-shaped core at a rotational shaft fixed to the center of rotation of the connecting arm, and a well-known driving rack having a rack portion engaged with the pinion is installed. To the push-up rod.

상기 원호형코어와 연결암은 직접 연결하거나 연결핀에 의하여 연결한다.The arc core and the connection arm are directly connected or connected by a connection pin.

상기 피니언과 연결암은 직접 연결하거나 연결암과 원호형코어와의 연결부를 원호형공간부에 삽입되는 부분의 직경보다 크게함으로써 연결을 확실하게 할 수도 있는 것이다.The pinion and the connection arm may be directly connected or the connection between the connection arm and the arc core may be made larger than the diameter of the portion inserted into the arc-shaped space portion.

이하 본 발명에 의한 사출금형의 원호형코어 처리장치를 첨부도면에 도시한 실시예에 따라서 상세히 설명한다.Hereinafter, the arc-type core processing apparatus of the injection mold according to the present invention will be described in detail according to the embodiment shown in the accompanying drawings.

본 발명에 의한 사출금형의 원호형코어 처리장치는, 제1도 내지 제4도에 도시한 바와 같이, 고정형판(1)과 가동형판(2) 사이에 피니언(12)을 구비한 회전축(11)과 이에 맞물리는 랙부(13)를 설치한 사출성형금형에 있어서, 상기 고정형판(1) 및 가동형판(2)의 개폐면에는 원호형코어(5)의 외주연을 감싸는 각각의 반원형 단면의 원호형공간부(3), (4)와 이와 동심원이면서 원호형코어(5)를 안내하는 원호형안내홈(6), (8)을 마주하는 위치에 형성하고, 상기 원호형코어(5)에는 연결암(9)을 그 회전중심으로 연장설치하여 원호공간부와 원호형안내홈의 중앙에 설치된 회전구동수단(10)에 연동연결하여서 된 것이다.The arc-shaped core processing apparatus of the injection mold according to the present invention, as shown in Figures 1 to 4, the rotating shaft 11 provided with a pinion 12 between the stationary plate 1 and the movable plate 2 In the injection molding mold having the rack portion 13 engaged therewith, the semi-circular cross-sections surrounding the outer periphery of the arc-shaped core 5 are formed on the opening and closing surfaces of the stationary plate 1 and the movable plate 2. The arc-shaped space portion (3), (4) and the concentric circle and the arc-shaped guide groove (6) for guiding the arc-shaped core (5) formed in a position facing each other, the arc-shaped core (5) The connection arm (9) is installed to extend the center of rotation by connecting to the rotary drive means 10 installed in the center of the arc space portion and the arc-shaped guide groove.

상기 원호형코어(5)를 회전진퇴작동시키는 회전구동수단(10)은, 상기 원호형코어(5)의 연결암(9)의 회전 중심에 고정되는 회전축(11)에 피니언(12)을 고정하고, 이 피니언(12)에 맞물리는 랙부(14)가 형성된 구동랙(13)을 통상의 구성으로 설치하여 진퇴작동슬라이드코어(미도시)에 연결하여 구성한다.The rotary drive means 10 for rotating and retracting the arc-shaped core 5 fixes the pinion 12 to the rotation shaft 11 fixed to the rotation center of the connecting arm 9 of the arc-shaped core 5. In addition, a drive rack 13 having a rack portion 14 engaged with the pinion 12 is installed in a conventional configuration, and connected to a forward and backward operation slide core (not shown).

상기 진퇴작동슬라이드코어는 유공압실린더(미도시)의 진퇴구동수단에 연결되는 것이다.The retraction operation slide core is connected to the retraction drive means of the hydraulic cylinder (not shown).

상기 가동형판(2)측에 형성되는 원호형안내홈(8)은 가동형판(2)에 직접 형성하여도 무방하나 원호형코어(5)의 회동진퇴작동에 따라 안내홈(8)이 마모되었을때 보수를 간편하게 하기 위하여 슬라이드 가이드(7)에 형성하여 조립하는 것이 바람직하다.The arc-shaped guide groove 8 formed on the movable plate 2 side may be formed directly on the movable plate 2, but the guide groove 8 may be worn according to the rotational movement of the arc-shaped core 5. It is preferable to form and assemble the slide guide (7) in order to simplify the maintenance.

상기 원호형코어(5)와 연결암(9)은 직접 연결하여도 무방하나 조립상 연결핀(16)에 의하여 연결하는 것이 바람직하다.The arc-shaped core 5 and the connecting arm 9 may be directly connected, but are preferably connected by the connecting pin 16 in assembly.

상기 피니언(12)은 연결암(9)의 회전축(11)에 고정설치하지 않고 연결암(9)의 단부에 기어부를 형성하여도 무방하다.The pinion 12 may be provided with a gear portion at the end of the connecting arm 9 without being fixed to the rotary shaft 11 of the connecting arm 9.

또한 상기 원호형코어(5)는 연결암(9)과 연결되는 연결부(17)를 상기 원호형공간부(3), (4)에 삽입되는 부분 보다 단면 직경을 크게하여 연결암(9)와의 연결이 안정된 상태로 이루어지도록 한다.In addition, the arc-shaped core 5 has a connecting portion 17 connected to the connecting arm 9 to have a larger cross-sectional diameter than a portion inserted into the arc-shaped space portions 3 and 4 so as to be connected to the connecting arm 9. Make sure the connection is stable.

이에 따라 상기 원호형안내홈(7), (8)의 단면 직경도 원호형공간부(3), (4)의 단면 직경 보다 크게 된다.Accordingly, the cross-sectional diameters of the arc-shaped guide grooves 7 and 8 are also larger than the cross-sectional diameters of the arc-shaped space portions 3 and 4.

도면중 미설명 부호 18은 직선코어이며, 19는, 20은 직선 공간부이고, 21은 베어링이며, P는 원호형관형부 또는 원호형관체(C)와 직선형관형부 또는 직선형관체(S)를 가지는 제품이다.In the drawings, reference numeral 18 denotes a straight core, 19 denotes a linear space portion, 21 denotes a bearing, and P denotes an arcuate tubular portion or arcuate tube C and a straight tubular portion or straight tube S. Product.

본 발명에 의한 원호형코어 처리장치가 적용된 사출금형에 의하여 원호형관형부 또는 원호형관체를 가지는 제품(P)을 성형함에 있어서는 제2도의 형개 상태에서 가동형판(2)을 전진시켜 형폐시킨 다음 상기 회전구동수단(10)을 구성하는 진퇴작동슬라이드코어에 의하여 구동랙(13)을 전진시키면 구동랙(13)의 랙부(14)에 맞물린 피니언(12)이 시계방향으로 회전하게 되고 피니언(12)의 회전축(11)에 연결고정되어 있는 연결암(9)이 시계방향으로 회전되며 연결암(9)에 연결고정되어 있는 원호형코어(5)가 시계방향으로 회전되면서 형폐된 고정형판(1)과 가동형판(2)의 원호형공간부(3), (4)내로 진입하게 되고, 이와 아울러 직선코어(18)를 직선공간부(19), (20)내로 진입시킨 상태에서 원호형공간부(3), (4)와 원호형코어(5) 사이 및 직선공간부(19), (20)과 직선코어(18) 사이의 공간에 수지를 주입하는 것이다.In forming a product P having an arc-shaped tube portion or an arc-shaped tube by the injection mold to which the arc-core processing apparatus according to the present invention is applied, the movable mold 2 is advanced in the mold opening state of FIG. 2 and then closed. Advancing the drive rack 13 by the forward and backward operation slide core constituting the rotary drive means 10 causes the pinion 12 engaged with the rack portion 14 of the drive rack 13 to rotate clockwise and the pinion 12 The connecting arm 9 is fixed to the rotary shaft 11 of the rotational clockwise rotation and the arc-shaped core (5) is fixed to the connecting arm 9 is rotated in the clockwise direction fixed mold plate (1) And circular arcs (3) and (4) of the movable plate (2), and at the same time the circular core (18) into the linear spaces (19), (20) in the state of entering the circular arcs Between (3), (4) and the arcuate core (5) and between the linear space portions (19), (20) and the straight core (18) To the injection of resin in the space.

또한 제1도의 형폐 상태에서 사출이 완료되고 가동형판(2)이 후퇴되어 형개되는 과정에서는 상기 고정형판(1)과 가동형판(2)에 형성된 원호형공간부(3), (4)와 원호형코어(5) 및 직선공간부(19), (20)와 직선코어(18)에 의하여 성형된 제품(P)이 고정형판(1)의 원호형공간부(3)에서 빠져나와 가동형판(2)측에 붙어서 이동된다.In addition, in the process in which the injection is completed in the mold closing state of FIG. 1 and the movable plate 2 is retracted and opened, the arc-shaped spaces 3, 4, and the circle formed in the fixed plate 1 and the movable plate 2 are opened. The product P formed by the arc core 5 and the linear space portions 19, 20 and the straight core 18 is pulled out of the arc-shaped space portion 3 of the fixed plate 1 and is movable. 2) It is attached to the side and moves.

이때 상기 진퇴작동슬라이드코어에 의하여 구동랙(13)을 후퇴시키면 구동랙(13)의 랙부(14)에 맞물린 피니언(12)이 반시계방향으로 회전하게 되고 피니언(12)의 회전축(11)에 연결고정되어 있는 연결암(9)이 반시계방향으로 회전하게 되며 연결암(9)에 연결고정되어 있는 원호형코어(5)가 반시계방향으로 회전되면서 원호형공간부(3), (4)사이에서 형성된 제품(P)의 원호형관체(C)에서 빠져나오게 되는 것이다.At this time, when the drive rack 13 is retracted by the retraction operation slide core, the pinion 12 engaged with the rack 14 of the drive rack 13 rotates in a counterclockwise direction and the rotation shaft 11 of the pinion 12 is rotated. The connection arm 9, which is connected and fixed, rotates in a counterclockwise direction, and the circular arc core 5, which is fixed and connected to the connection arm 9, rotates in a counterclockwise direction. ) Will escape from the arc-shaped tube (C) of the product (P) formed between.

한편 상기 직선공간부(19), (20)내에서 형성된 제품(P)의 직선관형체(S)에 삽입되어 있는 직선코어(18)은 상기 원호형코어(5)와는 별도의 진퇴작동수단에 의하여 후퇴시킴으로써 인출하는 것이다.On the other hand, the linear core 18 inserted into the linear tubular body S of the product P formed in the linear spaces 19 and 20 is provided in a retraction operation means separate from the arc-shaped core 5. It is withdrawn by retreating.

여기서 상기 원호형코어(5)와 직선코어(18)의 취출은 형개가 개시되는 시점에서 취출하는 것이다.The arcuate cores 5 and the linear cores 18 are taken out at the time when the mold opening is started.

한편 상기 원호형코어(5)는 구동랙(13)과 피니언(12)을 사용하지 않고 회전축(11)에 직결되거나 전동수단에 의하여 연동연결되는 모터(미도시)에 의하여 회전구동시키는 것에 의하여도 상술한 제품(P)의 사출성형과 취출을 수행할 수 있는 것이다.Meanwhile, the arc-shaped core 5 may also be driven by rotation by a motor (not shown) directly connected to the rotating shaft 11 or interlocked by a transmission means without using the drive rack 13 and the pinion 12. Injection molding and taking out of the above-mentioned product (P) can be performed.

이상과 같이 본 발명에 의하면 원호형관형부를 가지는 제품이나 관체와 같은 제품을 사출성형함에 있어서 원호형관형부의 성형 및 취출을 효율적으로 수행할 수 있는 것이다.As described above, according to the present invention, molding and taking out of the arc-shaped tubular portion can be efficiently performed in injection molding of a product having an arc-shaped tubular portion or a product such as a tubular body.

Claims (6)

고정형판(1)과 가동형판(2) 사이에 피니언(12)를 구비한 회전축(11)과, 이에 맞물리는 랙부(14)를 설치한 사출성형금형에 있어서, 상기 고정형판(1) 및 가동형판(2)의 개폐면에는 반원형 단면의 원호형공간부(3), (4)와 이와 동심원인 안내홈(6), (8)을 형성하고 원호공간부와 원호형안내홈의 원호중심에 통상의 회전구동수단(10)을 설치하고, 안내홈(6), (8) 사이로 동심원상의 원호형태를 삽입하고, 회전구동수단(10)과 원호형코어(5) 사이를 연결암(9)으로 연결하여서 됨을 특징으로 하는 상기 사출금형의 원호형코어 처리장치.In the injection molding mold in which a rotating shaft 11 having a pinion 12 and a rack portion 14 engaged therewith are installed between the stationary plate 1 and the movable plate 2, the stationary plate 1 and the movable plate 2 are movable. On the opening and closing surface of the template (2), arc-shaped space portions (3) and (4) of semi-circular cross section and guide grooves (6) and (8) concentric are formed thereon, and the arc space portion and the arc-shaped guide groove are formed at the center of the arc. A conventional rotary drive means (10) is installed, a concentric circular arc shape is inserted between the guide grooves (6) and (8), and the connecting arm (9) is connected between the rotary drive means (10) and the arc-shaped core (5). The arc-shaped core processing apparatus of the injection mold, characterized in that by connecting to. 제1항에 있어서, 상기 원호형코어(5)와 연결암(9)은 직접연결하여서 된 사출금형의 원호형코어 처리장치.2. The apparatus of claim 1, wherein the arc core (5) and the connecting arm (9) are directly connected. 제1항에 있어서, 상기 원호형코어(5)와 연결암(9)을 연결핀(16)에 의하여 연결한 것인 사출금형의 원호형코어 처리장치.The apparatus of claim 1, wherein the arc core (5) and the connecting arm (9) are connected by a connecting pin (16). 제1항에 있어서, 상기 피니언(12)과 연결암(9)은 직접 연결하여서 된 사출금형의 원호형코어 처리장치.The apparatus of claim 1, wherein the pinion (12) and the connecting arm (9) are directly connected to each other. 제1항에 있어서 상기 연결암(9)은 피니언(12)을 지지하는 회전축(11)에 연결암(9)을 연결한 사출금형의 원호형코어 처리장치.2. The arc-shaped core processing apparatus of claim 1, wherein the connecting arm (9) is connected to the rotating shaft (11) supporting the pinion (12). 제1항에 있어서, 상기 원호형코어(5)는 연결암(9)과 연결되는 고정형판(1)과 가공형판(2)에 형성된 원호형공간부(3), (4)에 삽입되는 부분 보다 단면 직경이 큰 연결부(17)를 형성하여 이 연결부(17)에 상기 연결암(9)을 연결한 사출금형의 원호형코어 처리장치.The part of claim 1, wherein the arc core (5) is inserted into the arc-shaped space portions (3) and (4) formed on the stationary plate (1) and the machining plate (2) connected to the connecting arm (9). The arc-shaped core processing apparatus of the injection mold which formed the connection part 17 which has a larger cross-sectional diameter, and connected the said connection arm 9 to this connection part 17. As shown in FIG.
KR1019900006566A 1990-05-09 1990-05-09 Undercut treating device for injection molding article KR920007033B1 (en)

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KR1019900006566A KR920007033B1 (en) 1990-05-09 1990-05-09 Undercut treating device for injection molding article

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KR920007033B1 true KR920007033B1 (en) 1992-08-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100933086B1 (en) * 2009-01-30 2009-12-21 권오석 The slide core unit where the circular arc style sweeping core is included
KR101019553B1 (en) * 2008-12-05 2011-03-08 대진화학 주식회사 Injection molding device for buckle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100567661B1 (en) * 2005-11-18 2006-04-04 이흥복 Rotation device for injection molding

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101019553B1 (en) * 2008-12-05 2011-03-08 대진화학 주식회사 Injection molding device for buckle
KR100933086B1 (en) * 2009-01-30 2009-12-21 권오석 The slide core unit where the circular arc style sweeping core is included

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