Forwa Mould Specialzing in: Super high precision moulds and special moulds like insert mould,double injection moulds(2K injection mould), overmould, Unscrew injection mould for OA, House electronic application, Automobile and Communication etc industry. Main market: Automotive accessories Electronic and medical Office automation Gear and clock movement Connector Precise parts

1. Bacical mouldBacical mould
structurestructure
Injection MouldingInjection Moulding

2. Learn some basic injection moulding

3. 1.1.Injectio materialInjectio material 6.6.Mould process(General)Mould process(General)
2.2.Mould designMould 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 deflectPart deflect
5.5.Injection MouldingInjection Moulding 10.10. Moulding parametreMoulding parametre

4. InjectionInjection
materialmaterial

5.  Why we use plastic material ?
Cheap than steel
Light than steel
Insolate。
Resistance chemical reacts。

6. Waterproof non corroding
Easy molding
Different material popular application
Recycle and Reuse
Short production cycle time
Rich resource

7. PC
PA
PC
PATPE

8.  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

9. Clamping Unit Mould Injection unit

10. MouldMould
designdesign

11. Plastic parts
Mould
Move Mold
Fix Mold

12. A B
A= Move Mould
B = Fix Mould
Why it should be move？？
If the mould cannot openIf the mould cannot open
the part cannot take it outthe part cannot take it out

13. Move MouldMove Mould
Fix MouldFix Mould
Open it in
here

14. How to put the material
inject into mould inside?
Move MouldMove Mould
Fix MouldFix Mould GuidGuid
pinpin

15. Sprue
materialFix MouldFix Mould
Move MouldMove Mould

16. Fix MouldFix Mould
Move MouldMove Mould

17. The surface is rough, the
sprue material is hard to
demoulding.

23. Sprue

24. Sprue

25. Sprue

26. Sprue

27. Sprue material

28. Melt material reach to the gate atMelt material reach to the gate at
the same timethe same time
its importantits important

29. What is gateWhat is gate????
GateGate == Joint to the parts and spure materialJoint to the parts and spure material

30. Unbalance sprue material design

40. FlashFlash
Short fillingShort filling

41. Balance sprue material design

50. Injector pinInjector pin

51. 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..

52. Eject structure as an example

53. Eject structure as an example

54. Eject structure as an example

55. Eject structure as an example

56. Eject structure as an example

59. InjectionInjection
moldingmolding

60. Clamping unit Mould Injection unit

61. 20
80
120
300
220
Inject/Injection
Crystal
Cooling
Heat

62. Clamping

64. 开始注塑

65. 注塑= 把已熔化的原料注入模具内

68. 注
塑

69. Packing injection

70. Packing

71. Cooling

73. Measure

80. Measure

81. Measure 松
退

84. Open mould

88. Part enject

91. Injector pin
return

92. Clamping

96. Injection moldingInjection molding
processprocess((GeneralGeneral))

119. InjectionInjection
moldingmolding
processprocess((SlideSlide))

120. e.g

121. When mould open, the part
cannot take it out.

149. Injection moldingInjection molding
processprocess((Angle pinAngle pin))

150. e.g

179. PartPart
deflectdeflect

180. unfillingunfilling
OK
StainStain
OK

181. Sliver markSliver mark
BruiseBruise

182. Air bubbleAir bubble
OK
OK
OK
BruisedBruised

183. BurrBurr FlashFlash
OK ok

184. Injector markInjector mark Welding lineWelding line

185. MouldingMoulding
parameterparameter

186. Temperature
Time
Pressure

187. - Temperature
- Material melt temp
- Melting temp.
- Moulding temp (cooling temp)
- Time
- Injection
- Cooling
- Packing (keep pressure)
- Ejection
- Open/close

188. - Pressure
- Clamping
- Injection
- Ejection

189. Temperature
Advantage
Disadvantage
- Good flow
- Easy crystal
- Flash
- Innerstress
- Shrinkage, sink。。。

190. Temperature
Disadvantage
- Less flash
- Lower Innerstress
- Welding line
- Short filling
Advantage

191. Time Disadvantage
- Part size stabilize
- High cost
- Low output
Advantage

192. Time
Disadvantage
- Largest output
- Size unstablize
Advantage

193. Pressure
Disadvantage
- Good flow
- Thinner filed can be inject
- Flash
- Innerstress
Advantage

194. Pressure
Disadvantage
- Lower innerstress
- welding line
- Short filling
- Size unstablished
Advantage

195. Learn more us please visit our homepage
Welcome you any inquires.
Thanks
Daisy Dong
daisy@forwa-mould.com
86-1802 826 8854
www.forwa-mould.com
Forwa Mould Precise Plastic Mould Co.,Ltd