Plastic mold structure and method of making

Details Plastic mold structure and method of making Plastic mold structure and method of making

B - Operations, Transporting

29

C

18/1202, 204/18.

B29C 33/38 (2006.01) B29C 33/40 (2006.01) B29C 33/56 (2006.01) C25D 5/34 (2006.01)

Patent

CA 2033943

RD-19234 PLASTIC MOLD STRUCTURE AND METHOD OF MAKING Abstract of the Disclosure A metal mold core which is partially insulated includes a metal continuous hard skin layer over the core and over the insulation to avoid discontinuity caused delamina- tion in the presence of flowing injected plastic. The skin layer includes abrasion resistant nickel deposited over elec- trolytically and electrolessly deposited copper applied over an interface metal layer on the core. The insulation layer includes multiple layers of a polyimide resin one of which layers includes glass micro spheres for decreasing the ther- mal conductivity to increase its insulation property and for decreasing the coefficient of thermal expansion (CTE) of the insulation to more closely match the core CTE to further pre- clude delamination in the presence of temperature excursions. -40-

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