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The contraction of plastic mold products

Plastic mould products in the process of forming has smaller size shrinkage, shrinkage in the size of the shrinkage rate.

S=[(L1-L)/L1 ]×100%    


S - shrinkage;        L1 - room temperature yes mold size ;    L - plastic products size at room temperature


The main factors affecting shrinkage are:

(1) the molding pressure temperature (3) (2) the injection mold temperature (5) (4) the molding time products wall thickness (6) the size of the inlet (7) such as glass fiber filling


             The table below for commonly used thermoplastic molding shrinkage rate

  

material

 


ABS

PC

H-PVC

PP

PA6

PBT

PET

PS

POM

The enhancement (%)


0.4-0.9

0.5-0.7

0.1-0.5

1.5-5.0

1.0-2.5

2.0

1.5-2.0

0.1-0.6

0.3-1.5

Enhancement (%)

0.1-0.2

0.1-0.3

 

 

0.4-0.8

0.2-0.8

0.35

0.1-0.3

1.3-2.8





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Phone: 13509005172

Tel: 0769-85394568

Email: jiezhen_tech@163.com

Add: Dongguan Changan Licheng Industrial F building

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