Vacuum Casting(PU)
The Capability for the Vacuum Casting 
Vacuum Casting is a widely used process in prototyping, typically used for building functional prototypes out of a broad range of polyurethanes and other polymers.

 

SuNPe has two vacuum casting workshops with 5 set vacuum casting machines. Max operating dimension is: 2000mm*1200mm*1000mm, max in 7kg.


   
   
One more new Vacuum Casting workshop
We can accurately reproduce the prototypes with original color, over-mold, texture and geometries from the master model and components. These plastic castings will closely represent the mechanical properties of the intended production parts from a steel mold. One silicone mold can cast about 15 to 20 pieces of parts, depends on complexity, painting or original color, size and other factors in different parts. 

What's the process of Vacuum Casting?

Step 1: CNC machine or SLA a master,do the required texture on the master

Step 2:Use the master to make silicone mold,one master can make 3 to 5 molds

Step 3:Inject the PU material to the silicone mold then put it to the oven to get the final product,one mold can inject 15 to 20 parts


Vacuum Casting Material

Transparent PU, Soft plastic PU, ABS PU, PP/PE PU, Polycarbonate PU. We purchase PU material from Hei-Cast company, Axson and BJB company.

Vacuum Casting Polyrethanes Resins
Material
Supplier
Material Simulation
Strength Shore
Flexion(MPA)
TC Max
Product Color Description
Advantage Disavantage
Shrinkage
ABS TYPE
Hei-CAST
ABS
83shD
1790
85
Amber,white and black
Good resistance
1
Axson
ABS
81shD
2200
93
Dark Amber
Good resistance
1
Axson
PS chocs
74shD
1500
70
White/Black
Ideal
1
POLYPRO TYPE
Axson
PP
75-83shD
600-1300
70
White/Black
Good resistance
1
COLORABLE ELASTOMERS
Hei-Cast
Elastomer
20-90shA
/
/
Milky white/Black
Good Bend
1
Hei-Cast
Elastomer
30-90shA
/
/
Clear
Good Bend
1
HIGH TEMPERATURE
Hei-Cast
PC
85shD
2254
105
White/Black
High T℃ 105°
1
Hei-Cast
PS/ABS
80shD
2300
120
Black
IdealTG120°
1
UL-VO
Hei-Cast
ABS
83shD
1800
85
White
94V0 flame restarding
1
Axson
Loaded ABS
87shD
3300
100
Off white
V0 far 25
1
CLEAR
Axson
PMMA
87shD
2100
100
Clear
Coloration TG100°
0.996
Axson
PMMA
87shD
2200
100
Clear
Coloration TG100°
0.996



Vacuum casting parts
A lot of successful vacuum casting projects have been done at SuNPe. As shown, different colors parts were all from the same silicone mold. Colors mixed in house, according to different required color codes in RAL/Pantone, or color sample clips from customer.

Over-mold
We also offer over-mold service and achieve a great success.This service is usually made from soft plastic over-molded with hard plastic parts to get the final cosmetic parts