KR960002408B1 - Method and device for pressure forming - Google Patents

Method and device for pressure forming Download PDF

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Publication number
KR960002408B1
KR960002408B1 KR1019930031496A KR930031496A KR960002408B1 KR 960002408 B1 KR960002408 B1 KR 960002408B1 KR 1019930031496 A KR1019930031496 A KR 1019930031496A KR 930031496 A KR930031496 A KR 930031496A KR 960002408 B1 KR960002408 B1 KR 960002408B1
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KR
South Korea
Prior art keywords
product
die
mold
piston
separated
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Application number
KR1019930031496A
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Korean (ko)
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KR950016986A (en
Inventor
유형조
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대우자동차주식회사
김태구
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Priority to KR1019930031496A priority Critical patent/KR960002408B1/en
Publication of KR950016986A publication Critical patent/KR950016986A/en
Application granted granted Critical
Publication of KR960002408B1 publication Critical patent/KR960002408B1/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
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/007—Semi-solid pressure die casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/203—Injection pistons
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/12—Making non-ferrous alloys by processing in a semi-solid state, e.g. holding the alloy in the solid-liquid phase

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

The method comprises firstly pressurizing the molten metal in the separated metal mold by pushing a piston(5) after inputting molten material between a separated metal mold(2) and a fixing die(4), and secondly pressurizing the molten metal by progressing the separated mold as long as the gap between the product thickness and the spacing between a separated metal mold and the fixing die to order to obtain the forging effect. The method enhances strength of the product, and productivity.

Description

다이캐스팅을 이용한 반용융 가압 성형방법 및 장치Semi-Melt Press Molding Method and Apparatus Using Die Casting

제1a,b,c도는 종래 다이캐스팅 성형진행을 보인 진행상태 단면도.Figure 1a, b, c is a cross-sectional view showing the progress of the conventional die-casting molding.

제2a,b,c도는 본 발명의 다이캐스팅 반용융 가압 성형진행을 보인 진행상태 단면도.Figure 2a, b, c is a cross-sectional view showing the progress of the die casting semi-melt press molding of the present invention.

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

1 : 가동다이 2 : 분할금형1: movable die 2: split mold

3 : 이젝트핀 4 : 고정다이3: eject pin 4: fixed die

5 : 피스톤 6 : 원료5: piston 6: raw material

7 : 기공 8 : 제품7: pore 8: product

본 발명은 다이캐스팅을 이용한 반용융 가압 성형방법 및 장치에 관한 것이다.The present invention relates to a semi-melt press molding method and apparatus using die casting.

종래의 다이캐스팅 성형방법은 제1a,b,c도에 도시된 바와같이 제품 두께와 일치되게 가동다이(A)와 고정다이(B)를 결합한 다음 용탕(C)을 투입하여 피스톤(E)으로 가압 제품 성형한 후 가동다이(A)를 후퇴시키고 이젝트핀(F)을 전진시켜 제품(G)을 빼내게 된다.In the conventional die casting molding method, as shown in FIGS. 1a, b, and c, the movable die A and the fixed die B are combined to match the product thickness, and then the molten metal C is introduced to press the piston E. After molding the product, the movable die (A) is retracted and the eject pin (F) is advanced to remove the product (G).

상기와 같은 종래의 다이캐스팅 성형방법은 개스홀 등의 결함발생으로 열처리가 불가능하며 피스톤(E)의 가압만으로 제품을 성형하므로서 내부에 기공(D)이 잔존하는 충진 불량이 발생될 뿐만 아니라 성형된 제품을 이젝트핀(F)으로 밀어 탈거시 제품에 변형이 발생되는 등의 폐단이 있는 것이다.In the conventional die casting molding method as described above, heat treatment is not possible due to defects such as gas holes, and molding of the product only by pressurizing the piston E causes filling defects in which pores D remain. If you push to the eject pin (F) there is a closed end such as deformation occurs in the product when removed.

본 발명은 이러한 점을 감안하여 제품부의 금형 요부를 분할형으로 하고 충진된 용탕이 충진되어 반응고 상태에서 2차 가압하므로써 단조효과를 주어 제품의 조직을 치밀하게 하여 밀도 및 강도를 향상시키고 열처리를 가능하게 하며 다이캐스팅과 같은 높은 생산성을 가지므로 적은 비용으로 가강도 부품을 생산할 수 있도록 한 것으로서 공정별로 상세히 설명하면 다음과 같다.In view of this point, the present invention is divided into a mold main part of the product part and the molten metal filled is filled with the forging effect by the secondary pressurization in the reaction state, thereby densifying the structure of the product to improve the density and strength and heat treatment. It is possible to produce high-strength parts at low cost because it has high productivity such as die casting.

제1공정 : 중앙부에 제품(8)의 두께(가)보다 간격(나)을 넓게 분할금형(2)이 설치된 가동다이(1)를 고정다이(4)와 결합시킨 다음 원료(6)를 투입하여 피스톤(5)으로 압착한다.First step: Combine the movable die 1 with the split mold 2 with the stationary die 4 with the spacing (b) wider than the thickness (a) of the product (8) at the center and insert the raw material (6). To the piston (5).

제2공정 : 피스톤(5)를 계속 압착하면서 분할금형(2)을 전진시켜 간격(나) 부분이 제품(8)의 원래 두께가 될때까지 압입전진시키梁. 이때의 분할금형(2)의 전진거리는 간격(나)의 제품(8)의 두께와의 차이만큼 전진시키梁. 단 분할금형 전진시점은 용탕의 충진이 완료되고 투입된 용탕이 반응고 상태(액상과 고상이 공존)가 되었을때이며 짧은 시간동안 가압한다. 이러한 분할 금형(2)의 가압에 의해 반응고상태의 용탕원료내에 잔존하고 있던 기공(7)이 없어져 조직이 치밀한 제품(8)을 얻게 된다.Second step: Advance the split mold (2) while continuing to press the piston (5) until the gap (b) becomes the original thickness of the product (8). At this time, the advancing distance of the divided mold 2 is advanced by the difference with the thickness of the product 8 of the interval (b). However, the split mold advance time is when the filling of the molten metal is completed and the injected molten metal is in the solid state (liquid and solid phase coexist). By pressurization of such a dividing die 2, the pores 7 remaining in the molten metal in the reaction solid state disappear, thereby obtaining a product 8 having a dense structure.

제3공정 : 제품의 응고가 완료된 후에 가동다이(1)를 후퇴시키고 이젝트핀(3)을 전진시켜 제품(8)을 탈형시키梁.Third step: After solidification of the product is completed, the movable die 1 is retracted and the eject pin 3 is advanced to demould the product 8.

상기 공정에 의해서 얻어지는 제품(8)은 원료용탕(6)을 투입후 피스톤(5)뿐만 아니라 용탕을 분할금형(2)을 전진시켜 압입하므로서 단조효과를 얻어 제품 조직의 밀도를 더욱 치밀하게 하므로서 강도를 증대시키고 열처리가 가능할 뿐만 아니라 이러한 고강도 부품을 생산하고 있는 다른 타제조법인 단조, 압출, 인발, 용탕단조 등 보다 생산성이 높은 다이캐스팅 공정을 이용하므로써 적은 생산비용으로 고강도 부품을 생산할 수 있다.The product 8 obtained by the above-described process is obtained by forging the molten metal by advancing the split mold 2 as well as the piston 5 after inserting the molten metal 6, thereby obtaining a forging effect, thereby making the density of the product structure more dense. It is possible to produce high-strength parts at a lower production cost by using a more productive die-casting process such as forging, extrusion, drawing, molten forging, and other other manufacturing methods that produce such high-strength parts.

Claims (2)

분할금형(2)와 고정다이(4) 사이로 용탕원료(6)를 투입한 후 피스톤(5)으로 압입한 다음 용탕이 반응고 상태에서 제품(8)의 두께(가)와 분할 금형(2)과 고정다이(4)의 간격(나) 차이만큼 분할금형(2)을 전진시켜 2차 가압 성형하여 제품에 단조효과를 얻는 것을 특징으로 하는 다이캐스팅을 이용한 반용융 가압 성형장치.The molten raw material (6) is introduced between the split mold (2) and the fixed die (4), and then press-fitted into the piston (5). Semi-melt press forming apparatus using die casting, characterized in that the forging effect on the product by advancing the divided mold (2) by the difference (b) between the fixed die and the fixed die (4). 가동다이(1) 중앙부에 제품(8)의 형상을 한 분할금형(2)을 전진ㆍ후퇴할 수 있게 끼움설치하여 고정다이(4)와 결합되게 한것을 특징으로 하는 다이캐스팅을 이용한 반용융 가압 성형장치.Semi-melt press forming using die casting, characterized in that the die (2) having the shape of the product (8) in the center of the movable die (1) is fitted so that it can be moved forward and backward and combined with the fixed die (4). Device.
KR1019930031496A 1993-12-30 1993-12-30 Method and device for pressure forming KR960002408B1 (en)

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Application Number Priority Date Filing Date Title
KR1019930031496A KR960002408B1 (en) 1993-12-30 1993-12-30 Method and device for pressure forming

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Application Number Priority Date Filing Date Title
KR1019930031496A KR960002408B1 (en) 1993-12-30 1993-12-30 Method and device for pressure forming

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KR960002408B1 true KR960002408B1 (en) 1996-02-17

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100360685B1 (en) * 2000-05-03 2002-11-13 강충길 Die Construction of semi-solid die casting

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