KR940001201B1 - Forming method a cold water passage for cylinder block - Google Patents

Forming method a cold water passage for cylinder block Download PDF

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Publication number
KR940001201B1
KR940001201B1 KR1019910017876A KR910017876A KR940001201B1 KR 940001201 B1 KR940001201 B1 KR 940001201B1 KR 1019910017876 A KR1019910017876 A KR 1019910017876A KR 910017876 A KR910017876 A KR 910017876A KR 940001201 B1 KR940001201 B1 KR 940001201B1
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KR
South Korea
Prior art keywords
hollow member
insertion pin
water passage
cylinder block
burned
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KR1019910017876A
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Korean (ko)
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KR930008351A (en
Inventor
한기복
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현대자동차 주식회사
전성원
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Priority to KR1019910017876A priority Critical patent/KR940001201B1/en
Publication of KR930008351A publication Critical patent/KR930008351A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

A method for forming a cooling-water passage for a cylinder block is disclosed in which a hollow member having guiding pieces at both ends is interposed at the upper portion of cylinder bores, sand particles are sprayed at a high pressure to bury the hollow member and form a water jacket, an insertion pin is inserted into the guiding pieces of the hollow member, the insertion pin enduring heat at 200-300 deg.C and being burned in pouring a molten material of over 1400 deg.C, and the hollow member having the insertion pin is installed at the upper portion of the cylinder bores so that the insertion pin is burned in casting, thereby preventing the water jacket core from being deformed.

Description

실린더 블록의 냉각수통로 형성방법Cooling water path formation method of cylinder block

제1도는 본 발명을 적용하기 위한 중공부재의 삽입핀 사시도.1 is a perspective view of the insertion pin of the hollow member for applying the present invention.

제2도는 본 발명의 다른 실시예인 삽입핀.Figure 2 is another embodiment of the insertion pin of the present invention.

제3도는 본 발명 삽입핀이 물자켓 코어의 중공부재에 설치된 평면도.3 is a plan view of the present invention, the insertion pin is installed on the hollow member of the jacket material core.

제4도는 실린더 블록의 평단면도.4 is a plan sectional view of the cylinder block.

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

7 : 삽입핀7: insertion pin

본 발명은 실린더 블록(Cylinder Block)의 냉각수통로 형성방법에 관한 것으로, 특히 사이어미즈드 타입 실린더 블록(Siamesed Type Cylinder Block)의 물자켓(Water Jacket) 코어의 제작시, 그 코어(Core) 내부의 보어 사이에 위치된 중공부재에 200~300℃에서 내열성을 갖는 삽입핀을 끼워 넣어 중공부재내의 모래유입을 방지하고, 주탕후에는 이 삽입핀을 연소시켜 소멸되게 하므로써 중공부재내의 냉각수 통로를 용이하게 형성시킬 수 있도록 하고, 또한 주조후에는 중공부재의 본래 기능을 충실히 담당할 수 있도록 한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a cooling water passage of a cylinder block, and more particularly, in the manufacture of a water jacket core of a sized cylinder block. Insertion pins with heat resistance at 200 ~ 300 ℃ are inserted into the hollow member located between the bore to prevent the inflow of sand into the hollow member, and after the pouring, the insert pin is burned and extinguished so that the cooling water passage in the hollow member is easily It is to be formed, and also to be able to faithfully take care of the original function of the hollow member after casting.

통상적인 냉각수통로의 형성방법을 보면, 육면체로 밀폐되는 금형내부에서 물자켓 코어를 제작하기 위하여 상부금형커버를 들어내고 모래를 고압으로 분사시킨 다음, 열을 가하여 물자켓 코어를 제작하게 된다.In the conventional method of forming the cooling water passage, the upper mold cover is lifted and sand is sprayed at high pressure in order to manufacture the inner jacket core in the mold, which is sealed with a hexahedron, and the inner jacket core is manufactured by applying heat.

이는 선출원된 특허출원 제90-8722호(동일 출원인임)에서 알 수 있는 바와 같이, 각 실린더보어 사이의 상단부 소정위치에 냉각수 통로를 형성함과 동시에 실린더 블록(1)의 주조시 물자켓 코어(2)의 변형을 방지하기 위하여, 중공부재(3)와 그 양측단부에 형성된 호형의 안내핀(4)(5)을 물자켓 코어(2)속에 매몰하고, 탈사후 이 안내편(4)(5)이 냉각수를 내부로 유동할 수 있도록 하므로써, 실린더 보어의 상단부를 균일하게 냉각시키고 이 부분에 대한 열적변형을 극소화하여 내구성을 향상시키도록 하고 있는 것이다.This can be seen in the previously filed patent application No. 90-8722 (the same applicant), while forming a coolant passage at a predetermined position between the upper ends of each cylinder bore and at the same time the jacket core during casting of the cylinder block ( 2) In order to prevent deformation, the hollow member 3 and the arc-shaped guide pins 4 and 5 formed at both ends thereof are buried in the jacket core 2, and after removal, the guide piece 4 ( By allowing the coolant to flow inside, 5), the upper end of the cylinder bore is uniformly cooled and the thermal deformation of this part is minimized to improve durability.

물자켓 코어(2) 제작시 실린더보어(6)(6′) 사이의 상단부에 안내편(4)(5)이 형성된 중공부재(3)를 물자켓 코어(2)에 매몰시켜 용탕을 주입하면, 이때 중공부재(3)는 실린더 블록(1)의 용탕과 유착되면서 양 실린더 보어(6)(6′) 사이의 벽부분 상단부에 매립된다.If the hollow member 3 having the guide pieces 4 and 5 is formed at the upper end between the cylinder bores 6 and 6 'when the inner jacket core 2 is manufactured, the molten metal is injected into the inner jacket core 2 to inject molten metal. In this case, the hollow member 3 is embedded in the upper end of the wall portion between both cylinder bores 6 and 6 'while being in contact with the molten metal of the cylinder block 1.

상기의 용탕주입과정에서 중공부재(3)는 그 양단부의 안내편(4), (5)이 물자켓 코어(2)에 매몰되어 있는 바, 실린더 블록(1)의 주조물을 얻을 수 있게 된다.In the molten metal injection process, the hollow member 3 has the guide pieces 4 and 5 at both ends thereof buried in the jacket core 2, so that the casting of the cylinder block 1 can be obtained.

그러나 상기에서 물자켓 코어의 제작시 고압으로 분사되는 모래입자가 중공부재 내부로 혼입되어 주조시에 이 모래가 중공부재에 소착되는 경우가 빈번하고, 따라서 냉각수통로가 폐쇄되는 경우가 발생하고 있는 실정인 것이다.However, the sand particles sprayed at high pressure during the fabrication of the material jacket core are mixed into the hollow member, and the sand is sintered to the hollow member during casting, and thus the cooling water passage is often closed. It is

본 발명은 상기와 같은 중공부재내의 모래혼입에 따른 냉각수통로의 차단을 방지하고 중공부재의 제기능을 완벽히 수행할 수 있도록 한 것으로, 이하 첨부한 도면과 관련하여 그 방법을 상세히 설명한다.The present invention is to prevent the blocking of the cooling water passage due to the sand in the hollow member as described above and to fully perform the function of the hollow member, the method will be described in detail with reference to the accompanying drawings.

안내편(4)(5)이 형성된 중공부재(3)에 있어서, 안내편(4)(5) 내부에 삽입핀(7)을 삽입하여서 된 중공부재(3)를 물자켓 코어(2) 내부에 매몰하되, 삽입핀(7)은 종이 또는 스티로폴 등의 압축재료로써 200~300℃에서 내열성을 갖고 1400℃ 이상의 용탕주입시 연소되게 한 것으로, 이와 같이 삽입핀(7)이 안내편(4)(5)에 삽입된 중공부재(3)를 실린더보어(6)(6′) 사이의 양측 상단부에 개재하고, 모래입자를 고압분사 시키면, 모래입자는 삽입핀(7)에 의해 차단되어 중공부재(3)내로의 유입이 방지되며, 이러한 상태에서 분사되는 모래에 의해 물자켓 코어(2)가 형성된다.In the hollow member 3, in which the guide pieces 4 and 5 are formed, the hollow member 3 formed by inserting the insertion pin 7 into the guide piece 4 and 5 inside the jacket core 2. The insertion pin (7) is a compression material such as paper or styropol, and is heat-resistant at 200-300 ° C to be burned when the molten metal is injected at a temperature of 1400 ° C or higher. The hollow member 3 inserted in (5) is interposed between the upper ends of the cylinder bores 6 and 6 'and sand particles are pressed at high pressure, and the sand particles are blocked by the insertion pins 7 so that the hollow members are blocked. (3) The inflow into the inside is prevented, and the material jacket core 2 is formed by sand sprayed in this state.

다음으로 1400℃ 이상의 용탕을 주입하면 중공부재(3)는 실린더 블록(1)의 용탕과 유착되면서 보어(6)(6′) 사이의 벽 부분 상단부에서 매립된다.Next, when the molten metal of 1400 ° C. or more is injected, the hollow member 3 is embedded in the upper end of the wall portion between the bores 6 and 6 ′ while being in contact with the molten metal of the cylinder block 1.

주탕 후 삽입핀(7)는 1400℃에서는 연소성이므로 연소하여 소멸되고 중공부재(3) 내부와 연통하는 냉각수 통로를 형성시킨다.After pouring, the insertion pin 7 is combustible at 1400 ° C., so that it is burned and extinguished to form a cooling water passage communicating with the inside of the hollow member 3.

본 발명에 있어서, 중공부재(3)에 형성되어 있는 안내편(4)(5) 내부에 삽입핀(7)의 형상은 제1도에서 보는 바와 같은 중공형상 또는 제2도에서 보는 바와 같은 중실형상이 적당하다.In the present invention, the shape of the insertion pin 7 in the guide pieces 4, 5 formed in the hollow member 3 is hollow as shown in FIG. 1 or solid as shown in FIG. The shape is appropriate.

이상과 같이 본 발명은 중공부재의 안내편에 삽입핀을 끼워 모래입자가 중공부재 내부에 혼입되는 것을 방지함으로써, 물자켓 코어의 변형을 방지함과 동시에 냉각수 통로가 용이하게 형성되도록 하여 실린더 블록의 냉각효과를 최대한 발휘케 할 수 있는 것이다.As described above, the present invention prevents sand particles from being mixed inside the hollow member by inserting the insertion pin into the guide piece of the hollow member, thereby preventing deformation of the jacket core and allowing the coolant passage to be easily formed. The cooling effect can be maximized.

Claims (3)

안내편(4)(5)이 양단에 형성되어 있는 중공부재(3)를 실린더보어(6)(6′)의 양측 상부에 개재하고, 모래입자를 고압분사하여 중공부재를 매몰시키는 물자켓 코어를 형성함과 동시에 중공부재(3)에 의한 냉각수 통로가 형성되게 하는 것에 있어서, 상기 중공부재(3)의 양단 안내편(4)(5)에 삽입핀(7)을 삽입하되, 삽입핀(7)은 200~300℃에서 내열성을 가지고 1400℃ 이상의 용탕주입시 연소되도록 하고, 삽입핀(7)이 삽입된 중공부재(3)를 상기의 실린더보어(6)(6′)의 양측 상부에 설치하여 주탕완료시 삽입핀(7)이 연소, 소멸되도록 한 것을 특징으로 하는 실린더 블록의 냉각수 통로 형성방법.A jacket core for interposing a hollow member 3 formed at both ends of the guide pieces 4 and 5 at both upper portions of the cylinder bores 6 and 6 'and burying the hollow member by high pressure injection of sand particles. At the same time to form a cooling water passage formed by the hollow member 3 at the same time, the insertion pin (7) is inserted into the guide pieces (4) (5) at both ends of the hollow member (3), 7) has a heat resistance at 200 ~ 300 ℃ to be burned when the molten metal injection of more than 1400 ℃, the hollow member (3) with the insertion pin (7) is inserted into the upper portion of both sides of the cylinder bore (6) (6 ') The installation method of the cooling water passage of the cylinder block, characterized in that the insertion pin (7) is burned, and disappeared when the pouring completed. 제1항에 있어서, 상기 삽입핀(7)이 종이 또는 스티로폴의 압축재료로 된 것을 특징으로 하는 실린더 블록의 냉각수 통로 형성방법.The method of claim 1, wherein the insertion pin (7) is made of a compressed material of paper or styropole. 제1항에 있어서, 상기 삽입핀(7)이 중공형상 또는 중실형상으로 이루어진 것을 특징으로 하는 실린더 블록의 냉각수 통로 형성방법.The method of claim 1, wherein the insertion pin (7) is formed in a hollow or solid shape.
KR1019910017876A 1991-10-11 1991-10-11 Forming method a cold water passage for cylinder block KR940001201B1 (en)

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Application Number Priority Date Filing Date Title
KR1019910017876A KR940001201B1 (en) 1991-10-11 1991-10-11 Forming method a cold water passage for cylinder block

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Application Number Priority Date Filing Date Title
KR1019910017876A KR940001201B1 (en) 1991-10-11 1991-10-11 Forming method a cold water passage for cylinder block

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KR930008351A KR930008351A (en) 1993-05-21
KR940001201B1 true KR940001201B1 (en) 1994-02-17

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