How to find a good plastic injection mold maker and molder in China is easily to see testimonials or to get call to its clients.
Also, whether it takes your RFQs seriously before quotation submission is also a hint to you. A responsible and professional mold maker and molder will learn your requirements and expectation deeply with internal analysis before quotation submission with ideas of part re-design improvement proposals in case of necessary.
A good preparation before tooling start will save your a lot of time and money.
Working in plastic industry of customs mold making and molding over 20 years with overseas contact and exports globally.