Browse Prior Art Database

Thermal Pin for Injection Molding

IP.com Disclosure Number: IPCOM000089430D
Original Publication Date: 1977-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Friery, EJ: AUTHOR

Abstract

In the injection molding process, melted or plasticized material is injected into a cool mold 1 of upper and lower forms 2 and 3. There it chills to be removed in solid state. When molding parts with cored holes, the mold core 4 is heated up, possibly resulting in poor surface finish, mold or part damage.

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Thermal Pin for Injection Molding

In the injection molding process, melted or plasticized material is injected into a cool mold 1 of upper and lower forms 2 and 3. There it chills to be removed in solid state. When molding parts with cored holes, the mold core 4 is heated up, possibly resulting in poor surface finish, mold or part damage.

A commercially available thermal pin 5 with a heat conductivity several magnitudes higher than core 4 is inserted into core 4 and its one end cooled by cooling liquid 6. This achieves better cooling and more uniform temperature distribution of core 4, resulting in higher productivity of the injection molding process.

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