What is two color injection molding

Two color injection molding is included two shot injection molding and two color over molding.Here I just introduce two shot injection molding.
Two shot injection molding is also called as two color injection molding,double color injection molding,bi injection molding,bi color injection molding,two component injection molding and 2K injection molding,However there are how many calls, but only one type of injection molding, two shot injection molding refers inject two kinds of the same material or two different material (PP+PP,PC+PC,PP+TPE) through one injection molding machine(two color injection molding machine) and one plastic mold(two color mold) by twice injection,and the final product has two colors or two parts.

What’s the different between two shot bi injection molding and normal injection molding?

1． The different in mold structure (one cavity mold as an example)

-Single plastic mold just has one cavity,core,one center injection gate and ejection unit.

-Two color plastic mold can be understood as composed of two single molds，there are two the same cores and two different cavities ,and two center injection gate and two ejection units

2.The different in injection molding machine

-Normal injection molding machine only have one screw and one barrel

How does two color injection molding work?

There are several types of two color injection molding, rotary table bi injection molding, rotary shaft two component injection molding, rotary table injection means after finishing the injection of the first color, then the mold will rotate 180°through rotation of machine’s plate need rotate , the first color will be rotated to the other side for the second injection.

Rotary platen mold such as:

-The rotary shaft injection molding is nearly as rotary plate injection,just don’t need to rotate whole mold,only the core of mold through rotation of center shaft.rotary axis mold such as:

Two component toothbrush mold

Two component toilet brush mold

Two component tool handle mold

Two component scrape mold,two color razor bing mold

But for some two color flip top cap, it’s neither rotary plate mold nor rotary axis mold, it’s belong to inner core pulling mold

The video of two color rotary platen injection molding and two component axis shaft injection molding,you can click this link:https://www.youtube.com/channel/UCZJurKNSVQJaQtBxcZn1Z6Q?view_as=subscriber

Focare Mould-China professional Two color mold maker,double color mold making facorty,two component mold manufacturer,we can offer you all kinds two color mold,two color rotary platen mold,two component rotary shaft or axis mold,if you have any questions about two shot injection molding,welcome to contact me.