We often use rigid plastic material to produce including High Density Polyethylene (HDPE), Low Density Polyethylene (LDPE), Polyvinyl chloride (PVC) and Acrylonitrile Butadiene Styrene (ABS).
2.Mould design
The key to select the right good steel for these moulds,
We will analyse material and product structure first
it is important to do the mould flow analysis before mould designing and planning the assembly and functionality of the mould.
3.Mould structure
Every industrial product mould needs to achieve the exact dimensions and weights , it is important to consider the shrinkage of the material , runner system, cooling system, quality of hot runner system also play an important role in finishing a good end product.
Mould cooling time in crates, pallets, electronic part and pipe fitting moulds is very important in the biggest factory Most mould makers use regular cooling system designs for these products, in sunwin mould we will customized cooling systems for every part separately. Optimization of cooling system can shorten the cycle time ,then reduce the production cost .
4.Hardness control & Quality
In the next stage, good steel assure long mould life.The steel for HDPE crates and pallets is China P20 for the core and cavity ,C45 steel for the mould base. The hardness of the steel is 35 – 38 HRC. the mould lift is 0.5 million shot times
PVC pipe fitting mould we will use 3Cr13 steel which helps the material flow well without sticking especially .This mould steel does not require chrome plating or polish and the hardness is strong enough to produce more than 0.5 millions shots.

Sunwin mould has the experience and expertise in crates, pallets,
5.Mould delivery time
For complex moulds such as the above we believe in completing projects with 60-70 days.