Vacuum Casting(PU)
The Capability for the Vacuum Casting 
   SuNPe owns 3 sets of vacuum casting machines in the past, which can cast prototypes with the max dimension up to 2200mm*1200mm *1000mm,2 more vacuum casting machines have been putting into use in 2018.

   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. The typical lead time is 7 working days for 10 parts.
   
One more new Vacuum Casting workshop
 With rapid devolpment of our company,we have established one more new work shop for vacuum casting in 2018,to meet different costmers increasing demands.
 Vacuum Casting is a widely used process in rapid prototyping, typically used for building 10 to 100 pieces of functional prototypes out of broad range of polyurethanes and other polymers.

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
We have made many successful vacuum casting parts.
On the left hand,it's plastic parts made from UP5690. We adjust a lot of colors to meet customers requirements.To make sure the color difference is small,we adjusted colors according to color codes or color samples from customers.

At first,we made a ABS mater to create the silicone mould, and then casting the parts through the silicone tooling,and finally remove the mold line and get a cosmetic parts.

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