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topic 9379

Electroless Nickel Plating Plastic Injection Molds


Dear All:

We need to plate with Electroless Nickel some plastic injection molds. The main reason is to protect from hydrogen to get out.

My questions:

1. If it's correct to plate with nickel to that destiny?

2. There are special (plastic) row material that unique to this plating?

3. What is the recommended thickness for this destiny?

Thanks and best regards,

- Israel


Dear Medat:

When you say avoid hydrogen to get out do you mean from the plastic or from the mold substrate? We have been plating plastic molds for automobile and other industries for over 6 years mostly for corrosive plastics such as ABS, PVC or CPVC. I need more specific info to help better.

Guillermo Marrufo
Monterrey, NL, Mexico

December 29, 2012

Q. My end product is a silicone molded eye implant. I want to do plating to get fine/shiny surface finish implant after molding. Any one can suggest the permanent plating method for the mold so that the plating/costing won't peel off after some time and stick to the molded parts.

Plastic/ silicone rubber medical device manufacturer - Madurai, TN, India

January 10, 2013

A. You do not mention what is the base material of your molds but properly applied electro-nickel or electroless nickel will not peel from conventional steel materials in a long time and both will resist corrosion and take a superb mirror finish. Chrome is harder but less resistant in case you process is extremely corrosive.
In any case, electroformed nickel or nickel-cobalt molds are a very good alternative to steel for molds that require outstanding corrosion resistance, good polishability and hardness.

Guillermo Marrufo
Monterrey, NL, Mexico

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