HAT_12144031_2_EN

ERRORS of
squirt
PRODUCTS
Cause-the generationRemedy


Controling Molded Part
Dimensions
Cause-the generation
 The

shrinkage of the product

 Shrinkage:
 The


thickness is too large

low pressure cavity, the high
level of shrinkage.

 High

temperatures are high
shrinkage

 The

Remedy

orientation of the large
molecules is large shrinkage

 Reduce

unnecessary
khii thickness.

 Cavity

pressure
regulator, plastic
suitable temperature.


Controling Molded Part Dimensions



Cracks and Part Breakage


The geneneration
 Due

to the impact from the outside when the mold or
residual internal stresses caused video output power
make microscopic cracks or stains on the product
shine.

Cause
 Due

to excess impact

 The

force of the product taken large.

 Residual

stress

 Internal

stresses due to processing conditions k
reasonable

 Due

spray-born Cake release stress cracking


Remedy
 Reduced

forces

 Improve

flow

 Increase

mold surface temperature, the temperature
of the resin flow, reducing pressure spray ....


Products warping


Cause
 The

change throughout the product shrinkage.

 Product
 Mold

removed soon

Design inappropriate


Generation
 Pressure

along the flow of resin to fall, making the
material compression irregular or inappropriate

temperature plastic cooling evenly. All will cause
warping.


Remedy
 Increasing

time pressures keep mold

 Adjust

the temperature on the surface of the mold

 Check

design mold

 Select

materials and shapes to balance the thickness.


Weldlines


Cause
 Design
 The

Plastic entrance path unreasonable

atmosphere is no place to escape

 Impact

of color


Generation
 The

black mark at the end of the flow (the air is
retained), the plastic not be filled when cold again
combined with the color of the cause of disability
lines like 1 welds


Remedy
 Settling
 Check

exhaust system

 Design
 Use

like not filling the mold with disabilities.

weldline road in no bearing positions.

low-viscosity materials.

 Identification

of specific areas by analyzing
MOLDFLOW.


Jetting


Cause
 Large

injection speed.

 Barrel

heating temperature is too high or too low.

 Nozzle
 Low

temperature mold.

 Small
 To

too small compared with casting material

port, low resin flow rate.

the thick irregular


The generation
 The

flow is too slow to plastic cooler and solidify
soon.

 The

front of each line will harden plastic front so
plastic line will go in the other direction causes the
plastic streak


Remedy
 Make

a thin when not needed as thick.

 Increase

or decrease the heating tank temperature,

mold fit.
 Reasonable

magnitude nozzle


 Use

pillows or underground vents for plastic flow
to fan out across cavity.




Use a tape type or style vent fan to turn smooth
flow throughout cavity. This reduces the stress
slip.


Sink Marks


Cause
 The

shrinkage of the material.


remedy