KR101795346B1 - Cooling hole cap with cooling water partitioning plate for injection mold - Google Patents

Cooling hole cap with cooling water partitioning plate for injection mold Download PDF

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Publication number
KR101795346B1
KR101795346B1 KR1020170104109A KR20170104109A KR101795346B1 KR 101795346 B1 KR101795346 B1 KR 101795346B1 KR 1020170104109 A KR1020170104109 A KR 1020170104109A KR 20170104109 A KR20170104109 A KR 20170104109A KR 101795346 B1 KR101795346 B1 KR 101795346B1
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South Korea
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ring
cooling hole
pressing member
groove
partition plate
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KR1020170104109A
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Korean (ko)
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추창오
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추창오
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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
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C45/7312—Construction of heating or cooling fluid flow channels
    • 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
    • B29C45/2673—Moulds with exchangeable mould parts, e.g. cassette moulds

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

Abstract

The present invention relates to a cooling hole cover having a coolant partition plate for an injection mold. More specifically, the present invention integrates a coolant partition plate which is assembled in a cooling hole to divide an inlet and outlet of the coolant, with a cover which shuts the cooling hole to prevent the coolant from leaking, such that a location of the coolant partition plate can be conveniently adjusted according to a rotation of the cooling hole cover. The cooling hole cover (100) of the present invention comprises: a ring expansion member (110) which is penetrated in a center thereof to be inserted by a tightening bolt (120), and has an outer inclination unit (111); a ring pressing member (130) which is ring-shaped, and is supported by the outer inclination unit (111) of the ring expansion member (110); a nut pressing member (140) which has a tightening screw hole (141), coupled to the tightening bolt (120) inserted into the ring expansion member (110), on one surface thereof; and a rubber ring (150) which is installed between the ring pressing member (130) and the nut pressing member (140), and is compacted according to a coupling-tightening of the tightening bolt (120) to expand the diameter, such that a cooling hole (C) is sealed.

Description

사출금형용 냉각수 칸막이판이 포함된 냉각홀 마개 {Cooling hole cap with cooling water partitioning plate for injection mold} BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling hole cap with a cooling water partitioning plate for an injection mold,

본 발명은 사출금형용 냉각수 칸막이판이 포함된 냉각홀 마개개에 관한 것으로, 보다 상세하게는 상부금형 또는 하부금형에 마련된 냉각수 이동로인 냉각홀에 조립되어 냉각수의 유입통로와 배출통로를 구획하는 냉각수 칸막이판과, 상기 냉각홀을 폐쇄시켜 냉각수의 유출을 방지하는 마개를 일체화시켜 상기 냉각홀 마개의 회전에 따라서 냉각 칸막이판의 위치를 간편하게 조정할 수 있도록 발명한 것이다.The present invention relates to a cooling hole stopper including a cooling water partitioning plate for an injection mold, and more particularly, to a cooling hole stopper incorporating a cooling water partition for assembling the cooling hole, which is a cooling water moving path provided in an upper mold or a lower mold, And a cap for closing the cooling hole and preventing the coolant from flowing out can be integrated so that the position of the cooling partition plate can be easily adjusted according to the rotation of the cooling hole stopper.

일반적으로, 사출성형이란 용융된 플라스틱 수지를 금형의 캐비티 내로 주입시킨 다음 이를 냉각시켜 특정 형태의 제품을 생산하는 것으로서, 이때 성형되는 제품의 품질은 사출 속도와 사출 압력, 용융 수지의 온도, 금형의 온도 등에 의해서 결정되며, 사출 성형이 이루어질 때 금형의 온도가 지나치게 높거나 낮은 경우에 성형 불량이 발생될 확률이 매우 높아진다.In general, injection molding is a method of injecting molten plastic resin into a cavity of a mold and then cooling it to produce a specific type of product. The quality of the molded product is determined by the injection speed, the injection pressure, the temperature of the molten resin, Temperature, etc., and the probability of occurrence of molding defects becomes extremely high when the temperature of the mold is excessively high or low when the injection molding is performed.

따라서, 금형의 온도를 적정하게 유지시키기 위해서 금형의 내부에는 냉각수가 통과할 수 있는 냉각홀을 형성하고, 이 냉각홀에 냉각수를 유입하여 금형의 온도를 적정수준으로 유지시킬 필요가 있다.Therefore, in order to properly maintain the temperature of the mold, it is necessary to form a cooling hole through which the cooling water can pass through the inside of the mold, and to let the cooling water flow into the cooling hole to maintain the temperature of the mold at an appropriate level.

그리고, 상기 금형 내부의 냉각홀에는 냉각수의 흐름을 유도하기 위한 칸막이판이 냉각홀을 폐쇄하는 마개에 더 설치되어, 냉각홀을 유입통로와 배출통로로 구획함으로서, 냉각수의 이동방향을 안내하면서 금형의 온도를 냉각시키도록 구성하여 냉각효율을 더 향상시키도록 하였다.A partition plate for guiding the flow of the cooling water is further provided in the cooling hole in the mold so as to close the cooling hole so that the cooling hole is partitioned into the inflow passage and the discharge passage to guide the moving direction of the cooling water, So that the cooling efficiency is further improved.

여기에서, 상기 냉각홀을 폐쇄하는 마개에 대한 선행기술은 본출원인이 선출원하여 등록된 특허문헌 2에 개시된바 있으며, 도 1 및 도 2에 도시한 바와 같이 조임볼트(13)가 삽입되도록 중앙이 관통되며, 상기 조임볼트(13)의 헤드부분과 분할링(14)이 각각 대응 접촉되도록 내측경사부(11)와 외측경사부(12)를 갖는 링확대부재(10)와; 상기 링확대부재(10)와 동일하게 중앙이 관통되면서 분할링(14)의 하단에 위치되며 조임볼트(13)의 조임작용에 따라 링확대부재(10) 측으로 이송되면서 분할링(14)을 가압해 링확대부재(10)의 외측경사부(12)를 통해 직경이 확대되도록 하는 링가압부재(15)와; 상기 링확대부재(10)를 통해 삽입 관통된 조임볼트(13)와 체결되면서 링가압부재(15)의 하단에 위치되며, 조임볼트(13)의 조임 시 나사이송작용을 통해 링가압부재(15) 측으로 이송되면서 링확대부재(10), 링가압부재(15)에 작용되는 가압력을 부여하는 너트가압부재(30)와; 상기 링가압부재(15)와 너트가압부재(30) 사이에 설치되며, 조임볼트(13)의 조임 시 이를 통해 링가압부재(15) 측으로 이송되는 너트가압부재(30)에 의해 압축되면서 직경이 확대 팽창됨과 함께 냉각홀(C)을 밀폐시키는 고무링(40)과; 상기 링가압부재(15)와 링확대부재(10)의 사이에 설치되며, 나사 조임력에 의한 너트가압부재(30)의 압축작용을 통해 고무링(40)의 확대 팽창과 함께 링의 직경이 확대되면서 냉각홀(C)에 견착되는 분할링(14)으로 구성되어 있다.The prior art for closing the cooling hole is disclosed in Patent Document 2 filed by the present applicant, and as shown in FIG. 1 and FIG. 2, the center of the stopper bolt 13 is inserted (10) having an inner inclined portion (11) and an outer inclined portion (12) so that the head portion of the tightening bolt (13) and the split ring (14) are in contact with each other; The center of the ring expanding member 10 is positioned at the lower end of the split ring 14 while passing through the center of the ring expanding member 10 and is moved toward the ring expanding member 10 in accordance with the tightening action of the tightening bolt 13, A ring pressing member 15 for enlarging the diameter through the outer inclined portion 12 of the solution enlarging member 10; And is positioned at the lower end of the ring pressing member 15 while being fastened to the tightening bolt 13 inserted through the ring enlarging member 10 and is fastened to the ring pressing member 15 A nut pressing member 30 for applying a pressing force acting on the ring expanding member 10 and the ring pressing member 15 while being transferred to the ring pressing member 15; Is pressed by the nut pressing member 30 which is provided between the ring pressing member 15 and the nut pressing member 30 and is conveyed to the ring pressing member 15 side when the tightening bolt 13 is tightened, A rubber ring (40) for sealing the cooling hole (C) together with the expansion and expansion; The diameter of the ring is increased along with the expansion of the rubber ring 40 due to the compression action of the nut pressing member 30 by the screw tightening force provided between the ring pressing member 15 and the ring expanding member 10 And a split ring 14 attached to the cooling hole C as it is.

그러나, 종래 선행 기술의 냉각홀 마개는 단순히 냉각홀을 폐쇄하는데 그 기능이 있으며, 상기 냉각홀 마개의 너트가압부재에 칸막이판이 나사 결합되어 냉각홀에 조립되는 경우에는 칸막이판의 설치위치를 외부에서 인지할 수 없어, 칸막이판에는 냉각홀 내경면에 억지 고정될 수 있는 고정턱부가 더 형성되어야 하는 폐단이 있었다.However, the prior art cooling hole stop simply functions to close the cooling hole, and when the partitioning plate is screwed to the nut pressing member of the cooling hole stop and assembled into the cooling hole, the installation position of the partitioning plate is moved from the outside The partition plate had a closed end to which a fixing tuck portion capable of being fixedly fixed to the inner surface of the cooling hole had to be formed.

또, 상기 냉각홀 마개와 칸막이판을 결합하는 나사부재가 냉각수에 쉽게 산화되어 열처리공정의 추가 및 나사체결에 따른 작업공수와 부품수 증가에 따라 제작비용의 상승으로 제품의 경쟁력을 저하되는 문제점이 있었다. In addition, the screw member which joins the cooling hole stopper and the partition plate is easily oxidized to the cooling water, so that the heat treatment process is added, and the manufacturing cost is increased due to the increase of the number of workpiece and the number of parts due to the screwing, there was.

[특허문헌 1]. 대한민국 공개특허공보 제10-2009-0112593호 막음부재 및 이를 구비한 금형 냉각장치 (공개일자 2011년05월26일)[Patent Document 1]. Korean Patent Laid-Open Publication No. 10-2009-0112593 DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention A closure member and a mold cooling apparatus having the closure member (disclosed on May 26, 2011) [특허문헌 2]. 대한민국 등록특허공보 제10-1197405호 금형 냉각홀 마개 (등록일자 2012년10월29일)[Patent Document 2]. Korean Registered Patent No. 10-1197405 Mold cooling hole stopper (Registration date October 29, 2012)

상기와 같은 종래기술의 문제점을 해결하기 위한 것으로서, 본 발명은 금형의 냉각홀을 폐쇄하는 냉각홀 마개에 냉각홀을 구획하여 냉각수의 이동을 유도하는 칸막이판을 일체 구성시켜, 상기 냉각홀 마개의 회전에 따라 칸막이판이 함께 회전되도록 함으로서 외부에서도 칸막이판의 위치를 인지시킬 수 있도록 하는데 그 목적이 있다.In order to solve the problems of the prior art as described above, the present invention is characterized in that a partition plate for partitioning a cooling hole into a cooling hole stop for closing a cooling hole of a mold and guiding the movement of the cooling water is integrally formed, So that the position of the partition plate can be recognized from the outside by rotating the partition plate together with the rotation.

본 발명의 다른 목적은, 냉각홀 마개와 칸막이판(170)을 보다 간편하게 일체화 결합시킴으로써, 조립 작업의 시간 및 공정을 단축시켜 제품생산성을 향상시킬 수 있도록 하는데 있다.Another object of the present invention is to improve the productivity of the product by shortening the time and process of the assembling work by combining the cooling hole stopper and the partition plate 170 more easily.

이와 같은 기술적 과제를 해결하기 위해 본 발명은, According to an aspect of the present invention,

조임볼트(120)가 삽입되도록 중앙이 관통되며, 외면에 외측경사부(111)를 갖는 링확대부재(110)와; 링형상을 갖고 상기 링확대부재(110)의 외측경사부(111)에 지지되는 링가압부재(130)와; 상기 링확대부재(110)에 삽입 관통된 조임볼트(120)와 체결되는 조임나사홀(141)이 일면에 구비되는 너트가압부재(140)와; 상기 링가압부재(130)와 너트가압부재(140) 사이에 설치되며, 조임볼트(120)의 체결 조임에 따라 압축되면서 직경이 확대 팽창하여 냉각홀(C)을 밀폐시키는 고무링(150)을 포함해 구성된 냉각홀 마개(100)에 있어서;A ring expanding member 110 passing through the center so as to insert the tightening bolt 120 and having an outer inclined portion 111 on its outer surface; A ring pressing member 130 having a ring shape and supported by an outer inclined portion 111 of the ring expanding member 110; A nut pressing member 140 provided on one surface of a fastening screw hole 141 to be fastened with a tightening bolt 120 inserted into the ring enlarging member 110; A rubber ring 150 which is installed between the ring pressing member 130 and the nut pressing member 140 and which is expanded in diameter while being expanded as the fastening bolt 120 tightens and expands to seal the cooling hole C A cooling hole stopper (100) comprising:

상기 링확대부재(110)와 너트가압부재(140)의 서로 마주하는 일면에는, 적어도 1개의 고정핀홈(112,142)이 각각 대응되게 형성되어, 상기 고정핀홈(112,142)에 고정핀(160)의 양단부가 끼워져 상기 링확대부재(110)와 너트가압부재(140)를 일체 조립시키며, 조임볼트(120) 체결 시 고정핀(160)에 의해 너트가압부재(140)가 회전되지 않으면서 이송되도록 구성한다.At least one fixing pin groove 112 and 142 are formed on the opposite surfaces of the ring enlarging member 110 and the nut pressing member 140 so as to correspond to the fixing pin grooves 112 and 142, So that the ring expanding member 110 and the nut pressing member 140 are integrally assembled and the nut pressing member 140 is not rotated by the fixing pin 160 when the tightening bolt 120 is fastened .

또, 너트가압부재(140)의 타측부에는 링고정홈(145)이 구비되고, 타측부 상면에서 링고정홈(145)까지 중심선을 따라 절개된 칸막이끼움홈(146)이 더 구비되어, 금형 내에 형성된 냉각홀(C)에 삽입되어 유입통로와 배출통로로 구획하는 칸막이판(170)의 일단을 상기 칸막이끼움홈(146)에 끼워 일체 결합되며, 너트가압부재(140)의 칸막이끼움홈(146)에 조립되는 칸막이판(170)의 일단부에는 양측에 링끼움홈(171)이 더 형성되어, 요(凹)형상의 링고정홈(145)을 통해 노출된 상기 링끼움홈(171)에 칸막이고정링(180)을 끼워 맞춰 칸막이판(170)을 너트가압부재(140)에 일체 결합시켜 달성한다.The nut pressing member 140 further includes a ring fixing groove 145 formed on the other side thereof and a partitioning groove 146 cut along the center line from the upper surface of the other side to the ring fixing groove 145, One end of a partition plate 170 which is inserted into the cooling hole C formed in the partition plate 140 and partitioned by the inflow passage and the discharge passage is integrally fixed to the partition plate fitting groove 146, Ring fitting grooves 171 are further formed on both sides of one end of the partition plate 170 assembled to the ring fitting groove 171. The ring fitting groove 171 exposed through the concave ring fixing groove 145, And the partition plate 170 is engaged with the nut pressing member 140 integrally by fitting the partition retaining ring 180 to the nut retaining ring 180. [

또한, 링확대부재(110)의 노출되는 일면에는 너트가압부재(140)에 칸막이판(170)이 끼워져 조립하기 위해 더 형성된 칸막이끼움홈(146)과 동일한 방향의 위치표시부(115)가 더 형성된다.A portion of the ring-expanding member 110 on which the partitioning plate 170 is inserted is formed on the exposed surface of the ring-expanding member 110 to further form a position indicator 115 in the same direction as the partitioning- do.

그리고, 링확대부재(110)의 중앙 관통구멍에는 분리나사홈(114)이 더 형성되어, 분해공구를 분리나사홈(114)에 체결시켜 링확대부재(110)를 냉각홀(C) 외측방향으로 분리되게 구성할 수 있다.A separating screw groove 114 is further formed in the central through hole of the ring expanding member 110 so that the decomposition tool is fastened to the separating screw groove 114 so that the ring expanding member 110 is moved outward As shown in FIG.

이러한 본 발명에 의하면, 금형의 냉각홀을 폐쇄하는 냉각홀 마개에 냉각수의 흐름을 안내하는 칸막이판이 일체 결합되면서, 상기 냉각홀에 삽입된 칸막이판의 방향을 외부에서 위지표시부를 통해 인지할 수 있게 함으로서 냉각수가 원활히 이동되게 하여 금형의 온도를 적정하게 유지시켜 사출성형 제품의 불량을 방지하고 품질을 향상시킬 수 있다.According to the present invention, the partition plate for guiding the flow of the cooling water is integrally coupled to the cooling hole stop for closing the cooling hole of the metal mold, so that the direction of the partition plate inserted into the cooling hole can be recognized from the outside through the digits display unit So that the cooling water can be smoothly moved and the temperature of the mold can be appropriately maintained to prevent defective injection molding products and improve the quality.

또, 링확대부재와 너트가압부재가 고정핀을 통해 일체 결합되고, 조임볼트의 나사 체결에 의해 너트가압부재가 고정핀을 따라서 승하강 이송되며 고무링을 압착함으로서, 종래 너트가압부재의 회전하면서 고무링을 압착해 외형의 변형 및 파손시키는 문제점을 해소함은 물론 냉각홀의 밀폐력을 증대시킬 수 있다.Further, the ring-expanding member and the nut pressing member are integrally coupled through the fixing pin, the nut pressing member is moved upward and downward along the fixing pin by screwing of the fastening bolt, and the rubber ring is pressed, It is possible to solve the problem that the rubber ring is compressed to deform and break the outer shape, and the sealing force of the cooling hole can be increased.

그리고, 링확대부재에 더 형성된 분리나사홈을 통해 분해공구를 체결시켜 냉각홀 마개를 금형의 냉각홀에서 쉽게 분리되게 함으로서 교체작업의 편의성 및 제품에 대한 만족도를 향상시킬 수 있는 효과 등도 있다.Further, the decomposition tool is fastened through the separate screw groove formed in the ring expanding member to easily separate the cooling hole stop from the cooling hole of the mold, thereby improving the convenience of the replacement operation and satisfaction with the product.

도 1은 종래 냉각홀 마개의 구성을 도시한 사시도.
도 2는 종래 냉각홀 마개의 단면도.
도 3은 본 발명인 냉각홀 마개가 적용된 사용 상태도.
도 4는 본 발명인 사출금형용 냉각수 칸막이판이 포함된 냉각홀 마개의 분해 사시도.
도 5는 본 발명인 사출금형용 냉각수 칸막이판이 포함된 냉각홀 마개의 결합단면도.
도 6a 및 도 6b는 본 발명의 구성인 냉각홀 마개와 칸막이판의 결합과정을 도시한 평단면도.
도 7은 본 발명인 냉각홀 마개의 저면도.1 is a perspective view showing a configuration of a conventional cooling hole stopper.
2 is a cross-sectional view of a conventional cooling hole stop;
FIG. 3 is a state in which the cooling hole stopper of the present invention is applied. FIG.
4 is an exploded perspective view of a cooling hole stopper including a cooling water partitioning plate for an injection mold according to the present invention.
FIG. 5 is an assembled sectional view of a cooling hole stopper including a cooling water partitioning plate for an injection mold according to the present invention. FIG.
6A and 6B are top and cross-sectional views showing a process of joining a cooling hole stopper and a partition plate, which is a constitution of the present invention.
7 is a bottom view of a cooling hole stopper according to the present invention.

본 발명인 사출금형용 냉각수 칸막이판이 포함된 냉각홀 마개는 상부금형 또는 하부금형에 마련된 냉각수 이동로인 냉각홀에 조립되어 냉각수의 유입통로와 배출통로를 구획하는 냉각수 칸막이판과, 상기 냉각홀을 폐쇄시켜 냉각수의 유출을 방지하는 마개를 일체화시켜 상기 냉각홀 마개의 회전에 따라서 냉각 칸막이판의 위치를 간편하게 조정할 수 있도록 발명한 것이다.A cooling hole cap including a cooling water partition plate for an injection mold according to the present invention includes a cooling water partition plate assembled in a cooling hole which is a cooling water movement path provided in an upper mold or a lower mold to divide an inflow passage and an exhaust passage of cooling water, The position of the cooling partition plate can be easily adjusted according to the rotation of the cooling hole stopper by integrating the stopper for preventing the outflow of the cooling water.

이하, 본 발명에 따른 사출금형용 냉각수 칸막이판이 포함된 냉각홀 마개의 구성과 조립방법에 대해 첨부된 도면을 참고로 하여 상세히 기술되는 실시 예들에 의해 그 특징들을 이해할 수 있을 것이다.Hereinafter, the structure and assembly method of the cooling hole stopper including the cooling water partitioning plate for an injection mold according to the present invention will be described in detail with reference to the accompanying drawings.

먼저, 본 발명인 냉각홀 마개(100)는 금형 내에 형성된 냉각홀(C)로부터 냉각수가 누수되는 것을 방지하도록 개구부에 결합되어 밀폐시키는데 사용되는 것으로, 도 3에서와 같이 금형(미부호)의 온도를 적정하게 유지시키기 위해서 금형의 내부에는 냉각수가 통과할 수 있는 냉각홀(C)이 다수개가 형성되고, 상기 각각의 냉각홀(C)에는 냉각수가 이동하는 관로를 형성하여, 금형의 온도를 적정수준으로 유지시키도록 한다.First, the cooling hole stopper 100 according to the present invention is used to seal the cooling hole to prevent the cooling water from leaking from the cooling hole C formed in the metal mold. The cooling hole stopper 100 is used to seal the temperature of the mold (not shown) A plurality of cooling holes C through which the cooling water can pass can be formed in the inside of the mold in order to keep the temperature properly, and a channel through which the cooling water moves can be formed in each of the cooling holes C, .

여기에, 상기 금형 내부의 냉각홀(C)에는 냉각수의 흐름을 유도하기 위한 칸막이판(170)이 냉각홀을 폐쇄하는 냉각홀 마개(100)에 일체 조립되어 상기 냉각홀(C)에 설치됨으로서 상기 냉각홀(C)을 유입통로와 배출통로로 구획해 냉각수의 이동을 안내하며 금형의 온도를 냉각시키도록 구성하여 냉각효율을 더 향상시키게 한다.The partition plate 170 for guiding the flow of the cooling water is integrally assembled with the cooling hole stopper 100 for closing the cooling hole and is installed in the cooling hole C in the cooling hole C in the mold, The cooling hole C is divided into an inlet passage and an outlet passage to guide the movement of the cooling water and cool the temperature of the metal mold to further improve the cooling efficiency.

본 발명은, 상기 사출금형용 냉각수 칸막이판(170)을 냉각홀 마개(100)에 일체 조립하면서도, 상기 칸막이판(170)의 설치 위치를 외부 작업자가 쉽게 인지할 수 있도록 구서한 것으로, 도 4 및 도 5를 참조하여 상세히 설명하면 다음과 같다.The present invention is such that the external operator easily recognizes the installation position of the partition plate 170 while integrally assembling the cooling-water partition plate 170 for injection mold into the cooling hole stopper 100, The details will be described with reference to FIG.

먼저, 본 발명인 냉각홀 마개(100)는 크게 조임볼트(120)가 삽입되도록 중앙이 관통되며, 외면에 외측경사부(111)를 갖는 링확대부재(110)와, 링형상을 갖고 상기 링확대부재(110)의 외측경사부(111)에 지지되는 링가압부재(130)와, 상기 링확대부재(110)에 삽입 관통된 조임볼트(120)와 체결되는 조임나사홀(141)이 일면에 구비되는 너트가압부재(140)와, 상기 링가압부재(130)와 너트가압부재(140) 사이에 설치되며, 조임볼트(120)의 체결 조임에 따라 압축되면서 직경이 확대 팽창하여 냉각홀(C)을 밀폐시키는 고무링(150)을 포함해 구성된다.The cooling hole stopper 100 according to the present invention includes a ring expanding member 110 having a ring shape and having an outer inclined portion 111 on an outer surface thereof so as to be inserted into the fastening bolt 120, A ring pressing member 130 supported on the outer inclined portion 111 of the member 110 and a tightening screw hole 141 fastened to the tightening bolt 120 inserted into the ring expanding member 110 are provided on one surface The nut tightening member 140 is installed between the ring pressing member 130 and the nut pressing member 140 and is expanded and expanded in diameter as the tightening bolt 120 tightens to form a cooling hole C (Not shown).

상기와 같이 구성된 본 발명의 냉각홀 마개(100)에서 링확대부재(110)의 경우 전체 형상이 조임볼트(120)가 삽입되도록 중앙이 관통된 단축의 원통체로 형성되어 잇는데, 이때, 상기 링확대부재(110)의 내측에는 접시머리 형태를 취하고 있는 조임볼트(120)의 헤드부분이 대응 접촉되도록 호퍼형태와 같이 경사지게 형성하고, 상기 링확대부재(110)의 외측에는 도면상 상단에 링가압부재(130)를 밀어 이송시킬 수 있도록 외측경사부(111)가 형성된다.In the cooling hole stopper 100 of the present invention having the above-described structure, the entire shape of the ring expanding member 110 is formed as a single cylindrical body passing through the center so as to insert the tightening bolts 120. At this time, The ring 110 is formed at an inner side of the member 110 so as to be inclined as a hopper shape so that the head portion of the fastening bolt 120 having a dish head shape is in contact with the ring member 110, The outer inclined portion 111 is formed so as to push and feed the pressing member 130.

이때, 상기 링확대부재(110)의 외측경사부(111)와 링가압부재(130)의 내경부는 대응하는 경사각을 갖고 형성되어, 링확대부재(110)의 이송에 따라 링가압부재(130)를 안정적으로 밀어 이송시킬 수 있게 하며, 본 발명의 실시예로, 상기 외측경사부(111)에 링형상을 갖고 일단이 절개된 형상의 분할링(118)이 더 구비된 상태에서 너트가압부재(140)에 나사조립된 조임볼트(120)를 회전시켜 링확대부재(110)가 링가압부재(130) 방향으로 이송되면서 분할링(118)을 가압해, 상기 분할링(118)의 직경이 확대되면서 링가압부재(130)를 안정적으로 지지함과 동시에 냉각홀(C)의 내면에도 지지되게 하는 것도 본 발명에 포함된다.At this time, the outer inclined portion 111 of the ring expanding member 110 and the inner diameter portion of the ring pressing member 130 are formed at corresponding inclination angles, and the ring pressing member 130 In the embodiment of the present invention, in the state where the outer inclined portion 111 is further provided with the split ring 118 having a ring shape and one end cut out in the outer inclined portion 111, The ring-expanding member 110 is rotated in the direction of the ring pressing member 130 by rotating the fastening bolt 120 screwed to the ring 140 to press the split ring 118 so that the diameter of the split ring 118 becomes The ring pressing member 130 is stably supported while being supported on the inner surface of the cooling hole C while being enlarged.

상기 링가압부재(130)는 전체 형상이 중앙이 관통된 단축의 원통체로 형성되며, 전술한 바와 같이 링확대부재(110)의 외측경사부(111)에 대응되게 내경부에 동일각도의 경사각을 갖고 형성할 수 있으며, 상기 외측경사부(111)의 경사각도 보다는 작게 형성시켜 조임볼트(120)의 체결에 따라 하면에 분할링(118)이 더 안정적으로 지지되게 하는 것도 바람직하다.The ring pressing member 130 is formed as a single cylindrical body having an overall shape that penetrates through the center and has an inclined angle of the same angle to the inner diameter portion corresponding to the outer inclined portion 111 of the ring expanding member 110 And the inclined angle of the outer inclined portion 111 may be smaller than the inclined angle of the outer inclined portion 111 so that the split ring 118 is more stably supported on the lower surface according to the tightening of the tightening bolt 120. [

즉, 상기 링확대부재(110)의 외측경사부(111)는 경사각도가 30 내지 35도의 범위가 바람직하고, 상호 동일각도를 이루는 링가압부재(130)의 내측경사는 25도 내지 30도의 범위가 바람직하다.That is, the outer inclined portion 111 of the ring expanding member 110 preferably has an inclination angle of 30 to 35 degrees, and the inner inclination of the ring pressing member 130 having the same angle is in a range of 25 to 30 degrees .

그리고, 너트가압부재(140)는 조임볼트(120)의 체결회전 시에 나사이송작용을 통해 링가압부재(130) 방향으로 이송되는데, 도면상 하측에 고무링(150)이 구비되도록 직경 단차를 갖는 원통체로 형성되며, 하면 중앙에 조임볼트(120)가 체결되는 조임나사홀(141)이 구비된다.When the tightening bolt 120 is fastened and rotated, the nut pressing member 140 is conveyed in the direction of the ring pressing member 130 through a screw feeding operation. In the drawing, the rubber ring 150 is provided on the lower side of the drawing, And a tightening screw hole 141 for fastening the fastening bolt 120 is provided at the center of the lower surface.

따라서, 조임볼트(120)의 체결 조임에 따라 너트가압부재(140)가 링가압부재(130) 방향으로 이송되면서 고무링(150)을 압축시키게 되고, 상기 압축된 고무링(150)의 직경은 확대 팽창하여 냉각홀(C)을 밀폐시키게 되는 구성을 갖게 된다.As the tightening bolt 120 is tightened, the nut pressing member 140 is conveyed toward the ring pressing member 130 to compress the rubber ring 150, and the diameter of the compressed rubber ring 150 is So that the cooling hole C is sealed.

여기에서, 상기 고무링(150)은 전체적인 형상이 원형링 형태로 형성되며, 외주면 중앙에 "V"자 형태의 홈이 적어도 1줄 이상 형성된 구조로 이루어지며, 내열, 내압, 내화성을 가지는 불소고무나 우레탄 재질로 이루어져 있다.Here, the rubber ring 150 is formed in the shape of a circular ring as a whole, and has a structure in which at least one line of "V" -shaped grooves is formed in the center of the outer peripheral surface, It is made of urethane material.

또, 너트가압부재(140)의 도면상 상측에는 요(凹)형상의 링고정홈(145)이 단차지게 구비되고, 상면에서 링고정홈(145)의 선단까지 중심선을 따라 칸막이판(170)이 삽입될 수 있게 절개된 칸막이끼움홈(146)이 더 구비된다.A concave ring fixing groove 145 is provided on the upper side of the nut pressing member 140 so as to be stepped on the partition plate 170 along the center line from the upper surface to the tip of the ring fixing groove 145, And a partitioning groove 146 that is formed to be insertable.

상기 너트가압부재(140)의 칸막이끼움홈(146)에 삽입해 고정되는 칸막이판(170)은, 금형 내에 형성된 냉각홀(C)에 삽입되어 유입통로와 배출통로로 구획하는데 사용하는 것으로, 종래 제품에는 상기 칸막이판을 냉각홀 내경에 억지끼워 고정시키기 위해 하단 양측에 끼움돌기가 형성되어야 하지만 본 발명에서는 끼움돌기를 형성하지 않으면서도 너트가압부재(140)에 일체 고정시키도록 하는데 있다.The partition plate 170 inserted and fixed in the partitioning fitting groove 146 of the nut pressing member 140 is inserted into the cooling hole C formed in the metal mold and is used for partitioning into the inflow passage and the discharge passage. In order to securely fix the partition plate to the inner diameter of the cooling hole, a fitting protrusion should be formed on both sides of the bottom of the product. However, in the present invention, the fitting protrusion is not formed but is integrally fixed to the nut pressing member 140.

이를 위해, 도 6a와 같이 너트가압부재(140)의 링고정홈(145)을 포함해 절개 형성된 칸막이끼움홈(146)에 칸막이판(170)을 삽입하게 되면, 칸막이판(170)의 양측에 형성된 링끼움홈(171)이 요(凹)형상의 링고정홈(145)을 통해 노출되며, "U" 형상의 칸막이고정링(180)을 상기 링고정홈(145)에 삽입한 후 상기 삽입된 칸막이고정링(180)의 단부를 외부공구(미도시)를 통해 링고정홈(145)의 외주연을 향해 가압해 링형상을 갖게 변형시켜 상기 칸막이끼움홈(146)에 끼워진 칸막이판(170)을 칸막이고정링(180)으로 고정시키게 된다.6A, when the partitioning plate 170 is inserted into the partitioning groove 146 formed by cutting the ring fixing groove 145 of the nut pressing member 140, the partitioning plate 170 is formed on both sides of the partitioning plate 170 The ring fitting groove 171 formed is exposed through the concave ring fixing groove 145 and after the "U" shaped partition fixing ring 180 is inserted into the ring fixing groove 145, (Not shown) toward the outer periphery of the ring fixing groove 145 to deform the ring so as to have a ring shape so as to form a partition plate 170 fitted in the partition plate fitting groove 146 Is fixed by the partition retaining ring (180).

그리고, 상기 링확대부재(110)와 너트가압부재(140)의 서로 마주하는 일면에는, 적어도 1개의 고정핀홈(112,142)이 각각 대응되게 형성되어, 상기 고정핀홈(112,142)에 고정핀(160)의 양단부가 끼워져 상기 링확대부재(110)와 너트가압부재(140)가 일체 조립되게 한다.At least one fixing pin groove 112 and 142 are formed on one face of the ring enlarging member 110 and the nut pressing member 140 so as to correspond to each other and the fixing pin 160 is fixed to the fixing pin groove 112, So that the ring expanding member 110 and the nut pressing member 140 are integrally assembled.

즉, 상기 링확대부재(110)의 고정핀홈(112)은 고정핀(160)의 단부가 삽입되어 일체 고정되게 하고, 너트가압부재(140)의 고정핀홈(142)은 고정핀(160)의 타단부가 삽입된 상태에서, 조임볼트(120)의 체결 시 고정핀(160)에 의해 너트가압부재(140)가 회전되지 않으면서 이송 가능하게 고정핀홈(142)이 상기 이송거리만큼 더 연장 성형하는 것이 바람직하며, 상기 링확대부재(110)의 고정핀홈(112) 길이도 연장해 형성하는 것도 가능하다. That is, the fixing pin groove 112 of the ring enlarging member 110 is inserted and fixed to the end of the fixing pin 160, and the fixing pin groove 142 of the nut pressing member 140 is fixed to the fixing pin 160 The fixing pin groove 142 is formed so as to be able to be conveyed so that the nut pressing member 140 is not rotated by the fixing pin 160 when the tightening bolt 120 is fastened while the other end is inserted, And the length of the fixing pin groove 112 of the ring expanding member 110 may be extended.

여기에서, 상기 링확대부재(110)와 너트가압부재(140)의 크기에 따라 고정핀홈(112,142)을 복수개 형성하고, 복수개의 고정핀(160)으로 조립하는 것도 본 발명에 포함된다.It is also included in the present invention that a plurality of fixing pin grooves 112 and 142 are formed according to the sizes of the ring expanding member 110 and the nut pressing member 140 and that the plurality of fixing pins 160 are assembled.

따라서, 칸막이판(170)과 너트가압부재(140)는 칸막이고정링(180)을 통해 일체 결합되고, 상기 너트가압부재(140)와 링확대부재(110)는 조임볼트(120)와 고정핀(160)을 통해 일체 결합된 상태에서, 상기 조임볼트(120)를 회전시키면 고정핀(160)에 너트가압부재(140)가 전체 회전되지 않으면서 상하로 이송되며, 고무링(150)을 압축시키게 되고 상기 압축된 고무링(150)의 직경은 확대 팽창하여 냉각홀(C)을 밀폐시키게 된다.The nut pressing member 140 and the ring expanding member 110 are integrally coupled to each other through the fastening bolt 120 and the fixing pin 140. Therefore, When the tightening bolt 120 is rotated in a state where the rubber ring 150 is integrally coupled to the fixing pin 160 through the fixing ring 160, the nut pressing member 140 is vertically transferred to the fixing pin 160, And the diameter of the compressed rubber ring 150 is enlarged and expanded to seal the cooling hole C.

상기와 같이 칸막이판(170), 너트가압부재(140), 링확대부재(110)가 일체화된 구성을 갖게 하면서, 상기 링확대부재(110)의 도면상 하측에서 작업자의 시선에 노출되는 일면에는 칸막이판(170)이 끼워지는 칸막이끼움홈(146)과 동일한 방향으로 위치표시부(115)가 더 형성된다.The ring expanding member 110 is integrally formed with the partition plate 170, the nut pressing member 140 and the ring expanding member 110. The ring expanding member 110 has one surface exposed to the line of sight of the operator A position indicating portion 115 is further formed in the same direction as the partition fitting groove 146 into which the partition plate 170 is fitted.

따라서, 상기 링확대부재(110)의 위치표시부(115)를 통해 작업자가 금형 외부에서 칸막이판(170)의 조립방향을 인지할 수 있어, 냉각홀(C) 내부에서 냉각수의 유입통로와 배출통로를 구획하는 칸막이판(170)의 정확한 위치를 조정할 수 있게 된다.Therefore, the operator can recognize the assembling direction of the partition plate 170 from the outside of the mold through the position indicating portion 115 of the ring expanding member 110, so that the cooling water flowing in the cooling hole C, It is possible to adjust the precise position of the partition plate 170 for partitioning the partition plate 170.

상기 위치표시부(115)는 도 7에서와 같이 칸막이끼움홈(146)과 동일한 방향인 직선의 홈형상으로 성형되는 것이 바람직하며, 화살표, 세모 등과 같이 방향성을 인지시킬 수 있는 다른 문양으로 형성하는 것도 가능하다.7, it is preferable that the position indicating part 115 is formed in a straight groove shape in the same direction as the partitioning fitting groove 146, and it is also possible to form the position indication part 115 with another pattern capable of recognizing the directionality such as arrows and triangles It is possible.

또, 상기 위치표시부(115)를 형성하기 위한 홈부를 활용해 작업자가 별도의 공구를 상기 위치표시부(115)에 끼워 회전시킴으로써 일체화된 칸막이판(170)이 냉각홀(C) 내에서 동시에 회전되어 칸막이판의 방향을 간편하게 조절 가능하다.In addition, by utilizing the groove portion for forming the position display portion 115, the operator can rotate the integral partition plate 170 by rotating the separate tool in the position display portion 115 to rotate simultaneously in the cooling hole C The direction of the partition plate can be easily adjusted.

즉, 냉각홀(C) 내부에 칸막이판(170)이 일체 조립된 냉각홀 마개(100)를 삽입하되, 상기 냉각홀 마개(100)의 구성에서 조임볼트(120)가 완전히 조여지지 않아 고무링(150)이 압착되지 않은 상태로 칸막이판(170)의 위치를 작업자가 대략적으로 조정해 삽입한 다음 상기 조임볼트(120)를 체결하면 너트가압부재(140)가 링가압부재(130)방향으로 이동하며 고무링(150)을 압축하면서 직경이 확대 팽창해 냉각홀(C)을 밀폐시키며 고정된다.That is, the cooling hole stopper 100, in which the partition plate 170 is integrally assembled, is inserted into the cooling hole C, but the tightening bolt 120 is not completely tightened in the structure of the cooling hole stopper 100, When the worker roughly adjusts and inserts the position of the partition plate 170 in a state in which the nut 150 is not squeezed and then tightens the tightening bolt 120, the nut pressing member 140 is moved toward the ring pressing member 130 And is expanded and expanded in diameter while compressing the rubber ring 150 to seal and fix the cooling hole (C).

이후에, 작업자가 금형 외부에서 칸막이판(170)의 위치를 미세 조정하기 위해 링확대부재(110)의 위치표시부(115)에 공구를 삽입해 링확대부재(110)를 회전시키면, 상기 링확대부재(110)와 고정핀(160)으로 조립된 너트가압부재(140)가 회전되어 칸막이판(170)의 방향을 더욱 정확하게 조정 가능하게 된다.Thereafter, when a worker inserts a tool into the position indicating portion 115 of the ring expanding member 110 to rotate the ring expanding member 110 to finely adjust the position of the partition plate 170 from the outside of the mold, The nut pressing member 140 assembled with the member 110 and the fixing pin 160 is rotated so that the direction of the partition plate 170 can be more accurately adjusted.

그리고, 링확대부재(110)의 중앙 관통구멍을 통해 조임볼트(120)가 조립되는데, 상기 관통구멍에 분리나사홈(114)이 더 형성시켜, 외부에서 별도의 분해공구를 상기 분리나사홈(114)에 체결시켜 링확대부재(110)를 냉각홀(C) 외측방향으로 잡아당겨 분리되게 구성하는 것도 본 발명에 포함됨을 밝혀둔다.The fastening bolt 120 is assembled through the central through hole of the ring expanding member 110. The fastening bolt 120 is further formed in the through hole and a separate screw groove 114 is further formed in the through hole, 114 to pull the ring-expanding member 110 outwardly in the cooling hole C so as to be separated.

이상에서와 같이 상술한 실시 예는 본 발명의 가장 바람직한 예에 대하여 설명한 것이지만 상기 실시 예에만 한정되는 것은 아니며, 본 발명의 기술사상을 벗어나지 않는 범위 내에서 다양한 변형이 가능하다는 것은 당업자에게 있어서 명백한 것이다.Although the preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. .

100. 냉각홀 마개 110. 링확대부재
111. 외측경사부 112. 고정핀홈
114. 분리나사홈 115. 위치표시부
120. 조임볼트 130. 링가압부재
140. 너트가압부재 141. 조임나사홀
142. 고정핀홈 145. 링고정홈
146. 칸막이끼움홈 150. 고무링
160. 고정핀 170. 칸막이판
171. 링끼움홈 180. 칸막이고정링100. Cooling hole stopper 110. Ring expanding member
111. Outer ramp 112. Fixing pin groove
114. Separation screw groove 115. Position indicator
120. Fastening bolt 130. Ring pressing member
140. Nut pressing member 141. Pressure screw hole
142. Fixing pin groove 145. Ring fixing groove
146. Partitioning groove 150. Rubber ring
160. Fixing pin 170. Partition plate
171. Ring fitting groove 180. Partition retaining ring

Claims (5)

조임볼트(120)가 삽입되도록 중앙이 관통되며, 외면에 외측경사부(111)를 갖는 링확대부재(110)와;
링형상을 갖고 상기 링확대부재(110)의 외측경사부(111)에 지지되는 링가압부재(130)와;
상기 링확대부재(110)에 삽입 관통된 조임볼트(120)와 체결되는 조임나사홀(141)이 일면에 구비되는 너트가압부재(140)와;
상기 링가압부재(130)와 너트가압부재(140) 사이에 설치되며, 조임볼트(120)의 체결 조임에 따라 압축되면서 직경이 확대 팽창하여 냉각홀(C)을 밀폐시키는 고무링(150)을 포함해 구성된 냉각홀 마개(100)에 있어서;
상기 링확대부재(110)와 너트가압부재(140)의 서로 마주하는 일면에는, 적어도 1개의 고정핀홈(112,142)이 각각 대응되게 형성되어, 상기 고정핀홈(112,142)에 고정핀(160)의 양단부가 끼워져 상기 링확대부재(110)와 너트가압부재(140)를 일체 조립시키며, 조임볼트(120) 체결 시 고정핀(160)에 의해 너트가압부재(140)가 회전되지 않으면서 이송되도록 구성하고;
너트가압부재(140)의 타측부에는 링고정홈(145)이 구비되고, 타측부 상면에서 링고정홈(145)까지 중심선을 따라 절개된 칸막이끼움홈(146)이 더 구비되어, 금형 내에 형성된 냉각홀(C)에 삽입되어 유입통로와 배출통로로 구획하는 칸막이판(170)의 일단을 상기 칸막이끼움홈(146)에 끼워 일체 결합한 것을 특징으로 하는 사출금형용 냉각수 칸막이판이 포함된 냉각홀 마개.A ring expanding member 110 passing through the center so as to insert the tightening bolt 120 and having an outer inclined portion 111 on its outer surface;
A ring pressing member 130 having a ring shape and supported by an outer inclined portion 111 of the ring expanding member 110;
A nut pressing member 140 provided on one surface of a fastening screw hole 141 to be fastened with a tightening bolt 120 inserted into the ring enlarging member 110;
A rubber ring 150 which is installed between the ring pressing member 130 and the nut pressing member 140 and which is expanded in diameter while being expanded as the fastening bolt 120 tightens and expands to seal the cooling hole C A cooling hole stopper (100) comprising:
At least one fixing pin groove 112 and 142 are formed on the opposite surfaces of the ring enlarging member 110 and the nut pressing member 140 so as to correspond to the fixing pin grooves 112 and 142, The nut enlarging member 110 and the nut pressing member 140 are integrally assembled and the nut pressing member 140 is not rotated by the fixing pin 160 when the tightening bolt 120 is fastened ;
The nut pressing member 140 further includes a ring fixing groove 145 formed on the other side thereof and a partitioning groove 146 cut along the center line from the upper surface of the other side to the ring fixing groove 145, Wherein one end of a partition plate (170) which is inserted into the cooling hole (C) and divides into an inlet passage and a discharge passage is integrally fixed to the partitioning fitting groove (146) by being fitted into the partitioning fitting groove (146). 삭제delete 청구항 1에 있어서, 너트가압부재(140)의 칸막이끼움홈(146)에 조립되는 칸막이판(170)의 일단부에는 양측에 링끼움홈(171)이 더 형성되어, 요(凹)형상의 링고정홈(145)을 통해 노출된 상기 링끼움홈(171)에 칸막이고정링(180)을 끼워 맞춰 칸막이판(170)을 너트가압부재(140)에 일체 결합시킨 것을 특징으로 하는 사출금형용 냉각수 칸막이판이 포함된 냉각홀 마개.Ring fitting grooves 171 are formed at both ends of one end portion of the partition plate 170 assembled into the partition fitting grooves 146 of the nut pressing member 140, And the partition plate 170 is integrally coupled to the nut pressing member 140 by fitting the partition fixing ring 180 into the ring fitting groove 171 exposed through the fixing groove 145. [ Cooling hole stop with plate. 청구항 1에 있어서, 링확대부재(110)의 노출되는 일면에는 너트가압부재(140)에 칸막이판(170)이 끼워져 조립하기 위해 더 형성된 칸막이끼움홈(146)과 동일한 방향의 위치표시부(115)가 더 형성됨을 특징으로 한 사출금형용 냉각수 칸막이판이 포함된 냉각홀 마개.The position indicator (115) in the same direction as the partition fitting groove (146) formed for fitting the partition plate (170) into the nut pressing member (140) is formed on the exposed surface of the ring expanding member (110) And a cooling hole partition plate for the injection mold. 청구항 1에 있어서, 링확대부재(110)의 중앙 관통구멍에는 분리나사홈(114)이 더 형성되어, 분해공구를 분리나사홈(114)에 체결시켜 링확대부재(110)를 냉각홀(C) 외측방향으로 분리되게 구성한 것을 특징으로 한 사출금형용 냉각수 칸막이판이 포함된 냉각홀 마개.
The ring enlarging member 110 is further provided with a separating screw groove 114 so that the resolving tool is fastened to the separating screw groove 114 so that the ring expanding member 110 is inserted into the cooling hole C The cooling hole partitions for the injection mold include the cooling hole partitions.
KR1020170104109A 2017-08-17 2017-08-17 Cooling hole cap with cooling water partitioning plate for injection mold KR101795346B1 (en)

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KR20240001957A (en) 2022-06-28 2024-01-04 김용태 Cooling device for mold

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Publication number Priority date Publication date Assignee Title
KR200467581Y1 (en) * 2012-10-25 2013-07-01 장영현 Stopcock of the Mold coolant hole

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20240001957A (en) 2022-06-28 2024-01-04 김용태 Cooling device for mold

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