There are two kinds of double mould: one is over mould, the other one is double mould.

The over mould means that injecting one part first, then telescoping it to another mold and be to a new part.

Double color includes independent double color and mixed double color: independent double color means that making two kinds of colors on one machine, usually finishing it by displacing the cover mold (by turning mold). A double mold needs making two sets of mold, the same two sets of cavity, and different two sets of cover. Two sets of mold base can be exchangeable; Mix double color, just needs one set of mold and the special plastic machine, which is annex two pieces of independent nozzle, and control the injection parameter of each nozzle independent.

Feature for double mould

a. Double mold need the matched injection machine

b. There are one rotation gear or slide gear.

c. There are differences between cover molds, but the cavity is the same.

d. Attention to the cylinder or other dynamic application

e. High requirement for precision

Painting Technology, Efficient Energy-saving

Spraying is an important surface treatment technology. It refers to body parts maintaining the original properties of basic materials, through preparation of a layer on its surface with a superior performance of the cover. From the preparation of its surface layer has a superior performance of the coverage layer, given the surface of wear-resistant parts, corrosion-resistance, high temperature, anti-oxidation, anti-fatigue properties, etc. Spraying technology are the greatest advantage to be able to prepared a number of ways better than the bulk material properties of thin-layer surface functionalization. Its thickness is only a few one-tenth of the structure, while parts with a higher than the bulk material resistance to abrasion, corrosion resistance and high temperature performance, etc. Even with the performance of precious, rare element, it would not significantly increase costs.