© gnu su-jin kim mold & die for plastic, stamping, forging, casting associate professor su-jin...

© GNU Su-Jin Kim© GNU Su-Jin Kim

Mold & DieMold & Die


Mold & DieMold & Diefor Plastic, Stamping, Forging, Castingfor Plastic, Stamping, Forging, Casting

Associate Professor Su-Jin Kim

School of Mechanical EngineeringGyeongsang National University



What is Mold & Die• Die & Mold is the tool used to produce large quantities of

same products.

Powder BreadMold & Die ?

Casting Blow MoldingDie CastingPressForging

Vacuum forming

Plastic Injection



Die & Mold Productions of Korea

• Korea produces $5.7 billion Die & Mold a year.• Plastic molds are $2.4 billion and Press dies are $2.0

billion.• 51% of productions are focused around Seoul.

51%

23%

15%

7%



Die & Mold Exports & Imports of Korea

• Korea Die & Mold industries export $2.1 billion and import $0.1 billion a year (2011).

17%15%

9%7%

6%

6%4%

3%

3%

3%



금형 업체 통계• 전체 : 2,600 업체 (2006 년 통계청 , 5 인 이상 )• 인력 : 평균 15 인 / 업체 , 중소기업 업종• 품목 : 플라스틱 976, 프레스 511, 다이케스팅 104, 기타 1037• 지역 : 경기 1008, 인천 269, 서울 256, 부산 256, 경남 244

…• 경남 : 창원 , 김해 집중

• 한국금형공업협동조합 : http://www.koreamold.com



경남 금형 업체• 경남 : 244 업체 (2006 기준 )• 지역 : 창원 55%, 김해 40%, 양산 5% ( 동부집

중 )

• 서부경남 금형산업 육성 한다면 ?강점 : 낮은 임금과 부지비용약점 : 수요기업 ( 자동차 , 가전 ) 과 거리기회 : 진주 - 창원고속도로 , 진사공단위협 : 다품종소량생산 ( 항공 ) 정책



Plastic

Automotive fender

Associate Professor Su-Jin Kim

School of Mechanical EngineeringGyeongsang National University



Plastic Injection Molding

• Plastics are melted in a heated cylinder and forced into a mold by hydraulic plunger of rotating screw.

• Complex shape and good dimensional accuracy can be achieved, as in die casting.

http://ma.gnu.ac.kr/vod/Plastic/Plastic_Injection_Molding.MP4http://kr.youtube.com/watch?v=bit-D1NnfjI&NR=1http://kr.youtube.com/watch?v=NedTUB7YQE0&feature=related



Injection Mold

• Die structureSLIDE CORE

EJECTION PLATE EJECTION PIN RETURN PIN

GUARD BUSH

GUARD PIN

ROCKET RING

SPRUE BUSHINGANGULAR PIN

CORE

돌출판 돌출핀

Injection Mold of JY-Solutec http://www.jysolutec.com



Injection MoldSlide Core



Injection Mold

Hydraulic Cylinder



Injection Mold

일반 핀

단차 형 핀 접시형 핀

BOSS 핀

Ejection Pin



Injection molding

Vacuum Cleaner: Hand grip

Blower: Housing

http://www.tsmould.com/cyberpr01.htm



Injection Mold



Blow molding

• Blow up a plastic balloon to fill the mold.

http://www.youtube.com/watch?v=vSabFFQUr9E&p=9B6D9EAE75875D9Dhttp://kr.youtube.com/watch?v=grIPNOHkdOc&feature=relatedhttp://kr.youtube.com/watch?v=3haIAsECzRchttp://www.youtube.com/watch?v=oR0gMKN58kY&p=9B6D9EAE75875D9D



Automotive Stamping Die



Automotive Stamp Die ( 프레스 금형 )

• Process: Drawing → Trimming → Hemming → Punching

http://www.youtube.com/watch?v=ydoEJnwMlnk



Draw Die

Lower die

Blank holder



Draw Die

(a) lower die

(b) blank holder

(c) upper die

(d) die assembly



Automotive Die Machining



Progressive Stamping Die

• Multiple operation such as punching, bending, blanking.

http://www.youtube.com/watch?v=BDIYBloDydM&hl=ko



Forging



Forging Die



Die Casting

• The molten metal is forced into the die cavity by high pressure.

Cold-chamber

http://www.youtube.com/watch?v=-_8MFbUdH6Y&feature=related



Die Casting



Mold Machining

NC Machining

CAM

Simulation

CAD

EDM

http://ma.gnu.ac.kr



Mold Design

• 3D Mold Design by UniGraphics



CAM

• Generate NC Data by Power Mill



Simulation & Optimization

• Simulation & Optimization by NCBrain



CNC Machining

• Mold machining by Machining Center

http://www.youtube.com/watch?v=5pteVYeqVHI



Electric Discharge Machining



Reference

• 한국금형공업협동조합 : http://www.koreamold.com• NCBrain www.ncbrain.com 금형가공시뮬레이션• AFDEX www.afdex.com 단조 해석• 태성정밀 http://www.tsmould.com 사출금형• DIETEC www.dietec.co.kr 프레스금형

© gnu su-jin kim mold & die for plastic, stamping, forging, casting associate professor su-jin...

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