© gnu su-jin kim die & mold for mass production mass production forging, die casting ( 단조,...

© GNU Su-Jin Kim© GNU Su-Jin Kim

Die & Mold for Mass ProductionDie & Mold for Mass Production

Mass ProductionMass Production

ForgingForging , Die Casting, Die Casting((단조단조 ,, 다이케스팅다이케스팅 ))

© © www.afdex.com



Impression-die forging (형단조 )

• Workpiece acquires the shape of the die cavity while deformed between the closing dies.

• Forging force : • also called Closed-die forging (패쇠단조 )

Die

Flash LandParting line

AkF p ykp: pressure-multiplying factors (3~12)



Impression-die hot forging

1STAGE 2STAGE 3STAGE

©gsf.co.kr

Bucket Tooth

http://ma.gnu.ac.kr/vod/Forming/Hot_Forging.wmv Hot forging



Tube Hydroforming

SME: http://www.youtube.com/watch?v=nylIvins3XE

• Hydraulic pump injects high pressure fluid inside a hollow tube to expand until it matches a negative mold.

• Strong and light structures for vehicles

Dies

Seals

Hydraulicpressure Tube



Die casting (다이캐스팅 )

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

http://www.youtube.com/watch?v=1AgDGLNE6Es SME 90s

Ejector platen (moves)

Ejector die half

Ejector box

Ladle

Stationarydie half

Shot

sleevePlunger

rod

Metal sleeveCover disk

Closing cylinder

Pouring holePlungerPlunger rod

Shot

sleeve

©갈창우



Die casting

• Can be automated for large production runs.• Strength-to-weight ratio of die-cast parts increases with

decreasing wall thickness.• Good surface finish and dimensional accuracy.• It is used for aluminium, magnesium and copper alloys.

http://www.youtube.com/watch?v=WptzR_-o9aY



Powder Metallurgy

http://www.hmptech.com

PM1: http://www.youtube.com/watch?v=n_FW7Q2xO5o



Powder Metallurgy

1. Powder production2. Blending or mixing(혼합 )3. Compaction(압축 )4. Sintering(소결 )5. Finishing operations(마무리가공 )

http://www.youtube.com/watch?v=1Mjsi2F2MrY

PM2: http://www.youtube.com/watch?v=iQIsk44JUYs&feature=related



Mass Production

Automotive fenderPlasticPlastic

((플라스틱플라스틱 ))



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://www.youtube.com/watch?v=uQgc8ZZAFEs http://ma.gnu.ac.kr/vod/Plastic/Plastic_Injection_Molding.MP4



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 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://kr.youtube.com/watch?v=grIPNOHkdOc&feature=relatedhttp://www.youtube.com/watch?v=oR0gMKN58kY&p=9B6D9EAE75875D9D

© gnu su-jin kim die & mold for mass production mass production forging, die casting ( 단조,...

Documents