Plastic mold structure and method of making

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

1989-11-15

1992-06-23

Herbert, Jr., Thomas J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

B32B 702, B32B 1508

Patent

active

051241927

ABSTRACT:
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 delamination in the presence of flowing injected plastic. The skin layer includes abrasion resistant nickel deposited over electroytically 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 thermal 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 preclude delamination in the presence of temperature excursions.

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Metal Finishing 57th Guide-Book, Directory Issue 1989, pp. 170-171.
Aluminum-Preplate Surface Conditioning for Electroless Plating, pp. 1-7, Ethone Company Literature.
ENPLATE NI-424, Ethone Company Literature.

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