plastic injection molding processing
TRANSCRIPT
Bacical mould Bacical mould structurestructure
Injection Moulding Injection Moulding
Learn some basic injection moulding
1.1.Injectio material Injectio material 6.6.Mould process(General)Mould process(General)
2.2.Mould design Mould design 7.7.Mould processMould process((Angle PinAngle Pin))
3.3.Gate materialGate material 8.8.Mould process(SlideMould process(Slide))
4.4.Ejector PinEjector Pin 9.9. Part deflect Part deflect
5.5.Injection Moulding Injection Moulding 10.10. Moulding parametre Moulding parametre
Injection Injection materialmaterial
Why we use plastic material ?
Cheap than steel
Light than steel
Insolate。
Resistance chemical reacts。
Waterproof non corroding
Easy molding
Different material popular application
Recycle and Reuse
Short production cycle time
Rich resource
PC
PAPC
PATPE
PC 280oc-320oc 60oc-80oc 120oc/4 h
POM 190oc-220oc 80oc-120oc 120oc/3 h
PA 280oc-300oc 40oc-80oc 80oc/10 h
ABS 230oc-270oc 60oc-80oc 80oc/3 h
ASA 240oc-280oc 40oc-80oc 80oc/3 h
PC/ABS 240oc-280oc 70oc-100oc 110oc/4 h
Material Melt Temp Mould Temp Dry Temp and time
Clamping Unit Mould Injection unit
Mould Mould designdesign
Plastic parts
Mould
Move Mold
Fix Mold
A B
A= Move Mould
B = Fix MouldWhy it should be move??
If the mould cannot openIf the mould cannot open
the part cannot take it outthe part cannot take it out
Move MouldMove Mould
Fix MouldFix Mould
Open it in here
How to put the material inject into mould inside?
Move MouldMove Mould
Fix MouldFix Mould Guid Guid pinpin
Sprue materialFix MouldFix Mould
Move MouldMove Mould
Fix MouldFix Mould
Move MouldMove Mould
The surface is rough, the sprue material is hard to demoulding.
Sprue
Sprue
Sprue
Sprue
Sprue material
Melt material reach to the gate at Melt material reach to the gate at the same timethe same time
its important its important
What is gateWhat is gate????
Gate Gate = = Joint to the parts and spure materialJoint to the parts and spure material
Unbalance sprue material design
FlashFlashShort fillingShort filling
Balance sprue material design
Injector pinInjector pin
Injector pin use to the part eject.Injector pin use to the part eject.
make the complex part eject from the fix mouldmake the complex part eject from the fix mould
easy to take it out by operator or roboteasy to take it out by operator or robot..
Eject structure as an example
Eject structure as an example
Eject structure as an example
Eject structure as an example
Eject structure as an example
Injection Injection moldingmolding
Clamping unit Mould Injection unit
20
80
120
300220
Inject/Injection
Crystal Cooling
Heat
Clamping
开始注塑
注塑 = 把已熔化的原料注入模具内
注塑
Packing injection
Packing
Cooling
Measure
Measure
Measure 松退
Open mould
Part enject
Injector pin return
Clamping
Injection molding Injection molding processprocess((GeneralGeneral))
Injection Injection molding molding
processprocess((SlideSlide))
e.g
When mould open, the part cannot take it out.
Injection molding Injection molding processprocess((Angle pinAngle pin))
e.g
Part Part deflectdeflect
unfillingunfilling
OK
StainStain
OK
Sliver markSliver mark
BruiseBruise
Air bubbleAir bubble
OK
OK
OK
BruisedBruised
BurrBurr FlashFlash
OK ok
Injector markInjector mark Welding lineWelding line
Moulding Moulding parameterparameter
Temperature
Time
Pressure
- Temperature- Material melt temp- Melting temp.- Moulding temp (cooling temp)
- Time- Injection - Cooling - Packing (keep pressure)- Ejection - Open/close
- Pressure- Clamping- Injection - Ejection
Temperature
Advantage
Disadvantage
- Good flow- Easy crystal
- Flash- Innerstress- Shrinkage, sink。。。
Temperature
Disadvantage
- Less flash- Lower Innerstress
- Welding line- Short filling
Advantage
Time Disadvantage
- Part size stabilize
- High cost- Low output
Advantage
TimeDisadvantage
- Largest output
- Size unstablize
Advantage
Pressure
Disadvantage
- Good flow- Thinner filed can be inject
- Flash- Innerstress
Advantage
PressureDisadvantage
- Lower innerstress
- welding line- Short filling- Size unstablished
Advantage
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Thanks
Daisy Dong
86-1802 826 8854
www.forwa-mould.com
Forwa Mould Precise Plastic Mould Co.,Ltd