KR200465929Y1 - Link ejector pin for undercut processing - Google Patents

Link ejector pin for undercut processing Download PDF

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Publication number
KR200465929Y1
KR200465929Y1 KR2020110000085U KR20110000085U KR200465929Y1 KR 200465929 Y1 KR200465929 Y1 KR 200465929Y1 KR 2020110000085 U KR2020110000085 U KR 2020110000085U KR 20110000085 U KR20110000085 U KR 20110000085U KR 200465929 Y1 KR200465929 Y1 KR 200465929Y1
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South Korea
Prior art keywords
link
mill pin
pin
link block
movable side
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KR2020110000085U
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Korean (ko)
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KR20120005133U (en
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은준형
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구미에이테크솔루션주식회사
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Priority to KR2020110000085U priority Critical patent/KR200465929Y1/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
    • B29C45/4435—Removing or ejecting moulded articles for undercut articles using inclined, tiltable or flexible undercut forming elements driven by the ejector means

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

Abstract

본 고안은 언더컷처리용 링크 밀핀에 관련되며, 구성에 특징을 살펴보면, 가동측(1)에 설치되고 형개시 고정측(2)을 향해 돌출되어 성형품(A)을 메인코어(3)로부터 취출하는 언더컷처리용 링크 밀핀에 있어서, 상기 밀핀(10)은 가동측(1)상에서 선회되도록 힌지(22)로 결합된 링크블럭(20)과 링크결합으로 연결되는 것을 특징으로 한다.
이에 따라, 본 고안은 링크블럭이 선회되면서 가동측의 이송력이 가해지는 작용점이 자연스럽게 가변되므로 밀핀의 승강위치에 따른 횡방향 위치이동에 유연하게 대응하여 이송력이 전달되고, 이에 밀핀의 승강위치에 따라 횡방향으로 가해지는 하중이 링크블럭상으로 흡수됨에 따라 밀핀의 폭을 4mm이하(예컨대, 2.5mm)의 소폭으로 형성하더라도 횡하중에 의한 휨이 방지되므로 협소한 금형장치에 간편하게 적용되는 효과가 있다.The present invention relates to a link mill pin for undercut processing, and in terms of its configuration, the present invention is installed on the movable side (1) and protrudes toward the fixed side (2) at the start of mold to take out the molded article (A) from the main core (3). In the link mill pin for undercut processing, the mill pin 10 is characterized in that the link block 20 is coupled to the link block 20 is coupled to the hinge 22 so as to pivot on the movable side (1).
Accordingly, the present invention is because the operating point of the moving force applied to the movable side is naturally changed while the link block is rotated, the transfer force is transmitted flexibly corresponding to the transverse position movement according to the lifting position of the mill pin, and thus the lifting position of the mill pin. As the load applied in the lateral direction is absorbed onto the link block, even if the width of the mill pin is formed to be 4 mm or less (for example, 2.5 mm), the bending due to the lateral load is prevented, so that it is easily applied to the narrow mold apparatus. have.

Description

언더컷처리용 링크 밀핀{Link ejector pin for undercut processing}Link ejector pin for undercut processing

본 고안은 언더컷처리용 링크 밀핀에 관한 것으로, 보다 상세하게는 금형상에서 성형이 완료된 성형품을 취출하면서 언더컷을 처리하기 위한 언더컷처리용 링크 밀핀에 관한 것이다.The present invention relates to a link mill pin for undercut treatment, and more particularly, to a link mill pin for undercut treatment for processing an undercut while taking out a molded article completed on a mold.

일반적으로 성형품은 고정측에 구비되는 상형과 가동측에 구비되는 하형에 각각 구비된 메인코어가 형합되어 형성된 캐비티공간에 용융물을 주입하여 성형되고, 성형품의 언더컷에 해당하는 부분은 메인코어와 별도로 경사코어가 구비되어 고정측과 가동측이 서로 분리되면 언더컷부분으로부터 멀어지는 방향으로 이동하게 된다. In general, a molded product is formed by injecting a melt into a cavity space formed by combining a main core provided in an upper mold provided on a fixed side and a lower mold provided on a movable side, and an undercut of the molded article is inclined separately from the main core. When the core is provided and the fixed side and the movable side are separated from each other, the core moves in a direction away from the undercut portion.

그리고 성형이 완료된 성형품은 밀핀에 의해 취출되되, 밀핀은 일단부가 가동측에 설치되어 가동측과 고정측이 서로 분리됨과 동시에 고정측을 향해 돌출되어 성형품을 메인코어로부터 취출하는 역할을 수행한다.In addition, the molded article is molded is taken out by the mill pin, the one end is installed on the movable side, the movable side and the fixed side is separated from each other and at the same time protrudes toward the fixed side serves to take out the molded product from the main core.

종래에 개시된 밀핀이 적용된 금형을 살펴보면, 특허등록번호 제10-0846851호에서 밀핀의 선단에 형성된 취출부가 제품의 걸림부를 형성하고 이에 걸어지므로, 경사코어가 이동함에 따라 제품의 언더컷부분이 경사코어에 딸려가는 것이 방지되므로 제품이 취출되는 과정에서 밀핀의 선단에 의해 긁히거나 파손되는 등의 손상이 방지되어 제품의 완성도가 향상되도록 하고 있다.Looking at the mold to which the conventionally disclosed mil pin is applied, the ejection portion formed at the tip of the mil pin in Patent Registration No. 10-0846851 forms a locking portion of the product and hangs on it, so that the undercut portion of the product is moved to the inclined core as the inclined core is moved. Since it is prevented from being accompanied, damage such as being scratched or broken by the tip of the mill pin in the process of taking out the product is prevented, thereby improving the completeness of the product.

또, 실용신안 공개번호 제20-2009-0004317호에서 외부언더컷을 처리하기 위한 슬라이드 코어에 연계하여 하측 내부 언더컷을 처리하는 슬라이드 코어를 구동시키고, 슬라이드 코어는 경사지게 설치된 변형밀핀에 설치함으로써, 내/외부 언더컷을 처리하기 위한 구성이 간단하도록 하고 있다.In addition, in Utility Model Publication No. 20-2009-0004317, the slide core for processing the lower inner undercut is driven in connection with the slide core for processing the outer undercut, and the slide core is installed on the deformation mill pin which is inclined, The configuration for handling external undercuts is simplified.

그러나, 상기한 종래기술은 변형밀핀의 하단부가 가동측과의 미끄럼운동력에 의해 고정측으로 돌출됨에 따라 미끄럼운동력에 의한 내구성을 확보하기 위해 사이즈 축소에 한계가 따랐다.However, the prior art described above has a limit in size reduction in order to secure durability by the sliding force as the lower end portion of the deformation pin is protruded to the fixed side by the sliding force with the movable side.

즉, 변형밀핀은 일단에 롤러가 구비되고, 롤러는 가동측상에 미끄럼운동되도록 면접되어 가동측이 승강작동시 변형밀핀이 고정측상으로 돌출되고, 이때 롤러는 가동측의 승강위치에 따라 횡방향으로 미끄럼운동되어 위치이동된다. That is, the deformation pin is provided with a roller at one end, the roller is interviewed so as to slide on the movable side, so that the deformation pin is protruded onto the fixed side when the movable side is lifted, and the roller is moved in the transverse direction according to the lifting position of the movable side. It slides and moves its position.

이처럼 가동측이 승강시 변형밀핀이 종방향 및 횡방향으로 하중이 동시에 작용하는바, 이때 횡하중에 대한 내구성을 확보하기 위해서는 변형밀핀의 폭을 최소 4mm이상의 두께로 형성하여야 하므로 변형밀핀의 두께 제한으로 인해 협소한 금형장치에 적용이 불가능한 폐단이 따랐다.Thus, when the movable side is lifted, the deformation mill pin acts at the same time in the longitudinal direction and the transverse direction. At this time, the width of the deformation mill pin should be formed to a thickness of at least 4 mm in order to ensure durability against the lateral load. Due to this, the closed end was not applicable to the narrow mold apparatus.

본 고안은 상기한 문제점을 해결하기 위해 착안 된 것으로서, 밀핀의 두께 축소 허용범위를 확대하여 협소한 금형장치에 간편하게 적용하기 위한 언더컷처리용 링크 밀핀에 관한 것이다.The present invention has been conceived to solve the above problems, and relates to a link mill pin for undercut processing for easy application to a narrow mold apparatus by expanding the thickness reduction allowance of the mill pin.

이러한 목적을 달성하기 위해 본 고안의 특징은, 가동측(1)에 설치되고 형개시 고정측(2)을 향해 돌출되어 성형품(A)을 메인코어(3)로부터 취출하는 언더컷처리용 링크 밀핀에 있어서, 상기 밀핀(10)은 가동측(1)상에서 선회되도록 힌지(22)로 결합된 링크블럭(20)과 링크결합으로 연결되는 것을 특징으로 한다.In order to achieve this object, a feature of the present invention is that the undercut processing link mill pin is installed on the movable side 1 and protrudes toward the fixed side 2 at the time of mold release to take out the molded article A from the main core 3. In this case, the pin 10 is characterized in that the link is coupled to the link block 20 and the coupling coupled to the hinge 22 to pivot on the movable side (1).

이때, 상기 밀핀(10)은 링크블럭(20)과 동일한 방향으로 선회되도록 힌지(12) 또는 원통형 홈(14a)과 돌기(14b)에 의해 링크결합되는 것을 특징으로 한다.At this time, the pin 10 is characterized in that the link is coupled by the hinge 12 or the cylindrical groove 14a and the projection 14b so as to pivot in the same direction as the link block 20.

또한, 상기 링크블럭(20)은 가동측(1)과 직교하는 수직선을 기준으로 밀핀(10)의 경사방향측으로 선회작동이 허용되도록 일단에 스톱턱(24)이 형성되는 것을 특징으로 한다.In addition, the link block 20 is characterized in that the stop jaw 24 is formed at one end to allow the turning operation to the inclined side of the mil pin 10 with respect to the vertical line perpendicular to the movable side (1).

또한, 상기 밀핀(10)은 고정측(2)에 설치되어 밀핀(10)의 단면형상과 동일한 형상으로 가이드홀(32)이 관통되는 가이드블럭(30)상에 지지되는 것을 특징으로 한다.In addition, the mill pin 10 is installed on the fixed side (2) is characterized in that it is supported on the guide block 30 through which the guide hole 32 in the same shape as the cross-sectional shape of the mill pin (10).

이상의 구성 및 작용에 의하면, 본 고안은 링크블럭이 선회되면서 가동측의 이송력이 가해지는 작용점이 자연스럽게 가변되므로 밀핀의 승강위치에 따른 횡방향 위치이동에 유연하게 대응하여 이송력이 전달되고, 이에 밀핀의 승강위치에 따라 횡방향으로 가해지는 하중이 링크블럭상으로 흡수됨에 따라 밀핀의 폭을 4mm이하(예컨대, 2.5mm)의 소폭으로 형성하더라도 횡하중에 의한 휨이 방지되므로 협소한 금형장치에 간편하게 적용되는 효과가 있다.According to the above configuration and action, the present invention is because the action point to which the feed force on the movable side is naturally changed while the link block is rotated, the transfer force is transmitted flexibly corresponding to the transverse position movement according to the lifting position of the mil pin. As the load applied in the lateral direction depending on the lifting position of the mil pin is absorbed onto the link block, even if the width of the mil pin is formed to be 4 mm or less (for example, 2.5 mm), the bending due to the lateral load is prevented. There is an effect applied.

도 1은 본 고안에 따른 언더컷처리용 링크 밀핀이 구비된 금형장치를 전체적으로 나타내는 구성도.
도 2는 본 고안에 따른 언더컷처리용 링크 밀핀을 분해하여 나타내는 사시도.
도 3a 내지 3b는 본 고안에 따른 언더컷처리용 링크 밀핀의 링크연결구조를 나타내는 구성도.
도 4는 본 고안에 따른 언더컷처리용 링크 밀핀의 작동상태를 나타내는 구성도. 1 is a block diagram showing the overall mold apparatus provided with a link mill pin for undercut treatment according to the present invention.
Figure 2 is a perspective view showing an exploded undercut link mill pin according to the present invention.
Figure 3a to 3b is a block diagram showing a link connection structure of the link mill pin for the undercut treatment according to the present invention.
Figure 4 is a block diagram showing the operating state of the link mill pin for undercut treatment according to the present invention.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 고안은 가동측(1)에 설치되고 형개시 고정측(2)을 향해 돌출되어 성형품(A)을 메인코어(3)로부터 취출하는 언더컷처리용 링크 밀핀에 관련되며, 이때 언더컷처리용 링크 밀핀은 두께 축소 허용범위를 확대하여 협소한 금형장치에 간편하게 적용하기 위해 밀핀(10), 링크블럭(20)을 포함하여 주요구성으로 이루어진다.The present invention relates to an undercut processing link mill pin which is installed on the movable side (1) and protrudes toward the fixed side (2) at the time of mold release to take out the molded article (A) from the main core (3). Is made of a major configuration including the mill pin 10, the link block 20 in order to easily apply to the narrow mold apparatus by expanding the thickness reduction allowable range.

본 고안에 따른 밀핀(10)은 가동측(1)상에서 선회되도록 힌지(22)로 결합된 링크블럭(20)과 링크결합으로 연결된다. 밀핀(10)은 고정측(2)과 메이코어(3)상에 경사각으로 삽입설치되어, 일단이 용융물이 주입되는 캐비티공간상으로 노출되고, 다른 일단은 링크블럭(20)과 링크결합으로 연결되어 가동측(1)과 연계작동된다.The mill pin 10 according to the present invention is connected to the link block 20 and the link coupling coupled to the hinge 22 so as to pivot on the movable side (1). Milpin 10 is inserted into the inclined angle on the fixed side (2) and maycore (3), one end is exposed to the cavity space into which the melt is injected, the other end is connected to the link block 20 by link coupling It is operated in conjunction with the movable side (1).

여기서 링크블럭(20)은 가동측(1)상에 힌지(22)로 결합되되, 이때 링크블럭(20)의 선회방향은 밀핀(10)의 경사각 방향으로 선회되도록 설치되고, 밀핀(10)의 승강 높이에 따른 횡방향 위치변동에 대응하여 힌지(22)를 축으로 선회되면서 이송력이 전달된다.Here, the link block 20 is coupled to the hinge 22 on the movable side 1, in which the pivot direction of the link block 20 is installed to pivot in the direction of the inclination angle of the mill pin 10, of the mill pin 10 The conveying force is transmitted while pivoting the hinge 22 about the axis in response to the transverse positional change along the elevation height.

또, 상기 밀핀(10)은 링크블럭(20)과 동일한 방향으로 선회되도록 힌지(12) 또는 원통형 홈(14a)과 돌기(14b)에 의해 링크결합된다. 도 3a는 밀핀(10)과 링크블럭(20)이 힌지(12)에 의해 링크결합된 상태를 도시하고, 도 3b는 밀핀(10)상에 원통형 돌기(14b)가 형성되고, 링크블럭(20)상에 일측이 절개된 원통형 홈(14a)이 형성되어 서로 맞물려 링크결합된 구성을 나타낸다.In addition, the mil pin 10 is linked by the hinge 12 or the cylindrical groove 14a and the projection 14b so as to pivot in the same direction as the link block 20. 3A illustrates a state in which the mil pin 10 and the link block 20 are linked by the hinge 12, and FIG. 3B illustrates a cylindrical protrusion 14b formed on the mil pin 10, and the link block 20 is formed. On one side, a cylindrical groove 14a having one side cut out is formed to be engaged with each other and is linked.

이처럼 밀핀(10)은 힌지(12) 또는 원통형 홈(14a)과 돌기(14b)에 의해 링크블럭(20)의 선회방향과 동일한 방향으로 선회되도록 링크결합됨에 따라 가동측(1)이 승강시 밀핀(10)의 승강위치에 따른 횡방향 위치이동방향과 동일한 방향으로 유동이 허용되므로 가동측(1)의 이송력이 보다 긴밀하게 전달되고, 특히 링크블럭(20)이 선회되면서 가동측(1)의 이송력이 가해지는 작용점이 자연스럽게 가변되므로 밀핀(10)의 승강위치에 따른 횡방향 위치이동에 유연하게 대응하여 이송력이 전달된다.As such, the pin 10 is coupled by the hinge 12 or the cylindrical groove 14a and the protrusion 14b so as to pivot in the same direction as the rotation direction of the link block 20. Since the flow is allowed in the same direction as the transverse position moving direction according to the lifting position of the 10, the conveying force of the movable side 1 is transmitted more closely, and in particular, the link block 20 is pivoted and the movable side 1 Since the action point to which the feed force is applied is naturally varied, the feed force is transmitted by flexibly corresponding to the transverse position movement according to the lifting position of the mill pin 10.

따라서, 밀핀(10)의 승강위치에 따라 횡방향으로 가해지는 하중이 링크블럭(20)상으로 흡수됨에 따라 밀핀(10)의 폭을 4mm이하의 소폭(예컨대, 2.5mm)으로 형성하더라도 횡하중에 의한 휨이 방지되므로 협소한 금형장치에 간편하게 적용되는 이점이 있다.Therefore, as the load applied in the transverse direction depending on the lifting position of the mill pin 10 is absorbed onto the link block 20, even if the width of the mill pin 10 is formed with a width smaller than 4 mm (for example, 2.5 mm), There is an advantage that can be easily applied to the narrow mold apparatus because the bending caused by.

또한, 상기 링크블럭(20)은 가동측(1)과 직교하는 수직선을 기준으로 밀핀(10)의 경사방향측으로 선회작동이 허용되도록 일단에 스톱턱(24)이 형성된다. 링크블럭(20)은 저면이 가동측(1)상에 밀착된 상태로 힌지(22)로 결합되되, 이때 링크블럭(20)의 저면은 일측은 도 1 또는 4와 같이 힌지(22)와 동축을 이루는 호형으로 형성되어 링크블럭(20)의 선회작동을 허용하고, 다른 일측에는 스톱턱(24)이 돌출되어 선회작동을 불허하게 된다. 이에 링크블럭(20)의 선회불량으로 인한 밀핀(10)의 꺽임현상 및 작동불량이 방지된다.In addition, the stop block 24 is formed at one end of the link block 20 so that the turning operation is allowed in the inclined direction of the mil pin 10 with respect to the vertical line perpendicular to the movable side 1. The link block 20 is coupled to the hinge 22 with the bottom surface in close contact with the movable side 1, where the bottom surface of the link block 20 is coaxial with the hinge 22 as shown in FIG. 1 or 4. It is formed in the shape of an arc to allow the turning operation of the link block 20, the stop jaw 24 is protruded on the other side is not allowed to turn. This prevents the bending and malfunction of the mill pin 10 due to the poor turning of the link block 20.

또한, 상기 밀핀(10)은 고정측(2)에 설치되어 밀핀(10)의 단면형상과 동일한 형상으로 가이드홀(32)이 관통되는 가이드블럭(30)상에 지지된다. 도 2에서 가이드홀(32)은 밀핀(10)의 외주면 사이즈를 고려하여 공차가공되고, 탈부착가능하도록 고정측(2)상에 볼트체결된다. 이에 밀핀(10)의 반복이송으로 인한 마모로 고정측(2)상에서 유격이 발생되더라도 가이드블럭(30)을 단순 교체하므로 정밀도가 간편하게 복원되는 이점이 있다.In addition, the mil pin 10 is installed on the fixed side (2) is supported on the guide block 30 through which the guide hole 32 passes through the same shape as the cross-sectional shape of the mil pin 10. In FIG. 2, the guide hole 32 is tolerance-processed in consideration of the size of the outer circumferential surface of the mill pin 10, and is bolted onto the fixed side 2 to be detachable. Thus, even if a play occurs on the fixed side 2 due to abrasion due to repeated feeding of the mill pin 10, since the guide block 30 is simply replaced, the precision is easily restored.

10: 밀핀 20: 링크블럭10: Milpin 20: Link Block

Claims (4)

가동측(1)에 설치되고 형개시 고정측(2)을 향해 돌출되어 성형품(A)을 메인코어(3)로부터 취출하는 언더컷처리용 링크 밀핀에 있어서,
상기 밀핀(10)은 가동측(1)상에서 선회되도록 힌지(22)로 결합된 링크블럭(20)과 링크결합으로 연결되고,
상기 링크블럭(20)은 저면 일측이 호형으로 형성되어 밀핀(10)의 경사방향측으로 선회작동을 허용하고, 저면 다른 일측에는 스톱턱(24)이 돌출되어 선회작동을 불허하도록 구비되며,
상기 밀핀(10)상에 원통형 돌기(14b)가 형성되고, 링크블럭(20)상에 일측이 절개된 원통형 홈(14a)이 형성되어 서로 맞물려 링크결합되는 것을 특징으로 하는 언더컷처리용 링크 밀핀.In the undercut process link mill pin which is installed in the movable side 1 and protrudes toward the fixed side 2 at the time of mold start, and takes out the molded article A from the main core 3,
The pin 10 is connected to the link block 20 and the link block coupled to the hinge 22 so as to pivot on the movable side (1),
The link block 20 is formed in an arc shape on one side of the bottom surface to allow turning operation toward the inclined direction of the mill pin 10, and a stop jaw 24 protrudes on the other side of the bottom side to disallow turning operation.
Cylindrical protrusion (14b) is formed on the mil pin (10), the cylindrical groove (14a) is cut on one side is formed on the link block 20, the link mill pin for undercut treatment, characterized in that the interlocking link. 제 1항에 있어서,
상기 밀핀(10)은 링크블럭(20)과 동일한 방향으로 선회되도록 힌지(12) 또는 원통형 홈(14a)과 돌기(14b)에 의해 링크결합되는 것을 특징으로 하는 언더컷처리용 링크 밀핀.The method of claim 1,
The mill pin 10 is a link mill pin for undercut processing, characterized in that the link is coupled by the hinge 12 or the cylindrical groove (14a) and the projection (14b) so as to pivot in the same direction as the link block (20). 삭제delete 제 1항 또는 2항에 있어서,
상기 밀핀(10)은 고정측(2)에 설치되어 밀핀(10)의 단면형상과 동일한 형상으로 가이드홀(32)이 관통되는 가이드블럭(30)상에 지지되는 것을 특징으로 하는 언더컷처리용 링크 밀핀.3. The method according to claim 1 or 2,
The mill pin 10 is installed on the fixed side (2) under the link shape for the undercut process, characterized in that supported on the guide block 30 through which the guide hole 32 passes through the same shape as the cross-sectional shape of the mill pin (10) Milpin.
KR2020110000085U 2011-01-05 2011-01-05 Link ejector pin for undercut processing KR200465929Y1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180040973A (en) * 2016-10-13 2018-04-23 임영은 Core guide set

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990023720U (en) * 1997-12-08 1999-07-05 김영환 Undercut Molding Machine for Injection Mold

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990023720U (en) * 1997-12-08 1999-07-05 김영환 Undercut Molding Machine for Injection Mold

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180040973A (en) * 2016-10-13 2018-04-23 임영은 Core guide set
KR101945994B1 (en) * 2016-10-13 2019-02-08 임영은 Core guide set

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