Home » Plastic Injection Molding in China » How to deal with Chinese mold maker?

How to deal with Chinese mold maker?

Over the years we have been taken advantages of with the cheap side of mold making. You get what you pay for. I have heard of a mold cracking in half just last year from China, water poring out of it in the press. As a mold maker back in the 80's and 90's we started to see import steel making its way to our machines. We could tell on the CNC's or polishing we were not getting what we bargained for. After heat treat OMG, warp. We use to say they put old "bed springs" in the alloy mix. When drilling a hole in this steel it would not be constant feed rate by hand, you could feel the drill push easy then hard etc. So we had to be very precise in ordering our molds with certification. We ordered 4 large molds from China in 2004, the heat treat was horrible, we did not get our certification, it looked fake. Someone was trying to pull a fast one. I hardness tested several blocks from the molds, not good. We spent approx $450,000 for those molds back in 2004 and we tried to outsource and handle the engineering real close. We tried to do everything real and it back fired. These molds were for electrical components and tolerances on my parts were critical, 4 to 8 cavity molds, the quality was just not there. Glass filled nylon wore down these mold in 8 months, we had to retool.

We paid high school fees as you call it for faulty/inferior molds from China. The only way to deal with a Chinese mold maker is to specify the grade of material you want, shore hardness, heat treatment and certification on the quality of steel on the molds. The guarantee from any company in China is not worth the paper it is written on, unless you are willing to ship any product back and forth to China at your own cost for repairs.

Get tool drawings first and get a qualified designer to check them and accept. On completion of mold do a minimum production run of 3 days and see the quality of the product. If you are happy with what you have then get them to strip the mold and check for any wear and tear on mating surfaces. If this is ok then purchase it and the production run. Trust me this is the only way as I am still recovering from the financial loss from 10 years ago. This is what we do now and it seems to work.
An experienced expert in China could be helpful. Actually during the developing period, there are many levels in all industries in China. it is lucky if you could find the topic 3 among them.

Good luck
- - - -> by: May

Post a Comment:

    
Plz Calculate (4 - 4) =
(Your comment will show after approved.)

You may also like:

Featured Articles
Visit injection molding factory in ... Visit injection molding factory in China before closing the dealNot being in the injection molding industry, I was looking for tips on how to judge a company or factory on their capability or ...