Browse Prior Art Database

Pressure Sensitive Venting for Fuser Roll Mold

IP.com Disclosure Number: IPCOM000061381D
Original Publication Date: 1986-Jun-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Burbas, KM: AUTHOR [+3]

Abstract

When low viscosity elastomer materials were used in standard fuser roll molds, incomplete filling of the mold occurred at the mold's upper exit end due to increased flow through the mold's venting areas. A mold modification is described which allows complete elastomer coverage of the fuser roll core.

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Pressure Sensitive Venting for Fuser Roll Mold

When low viscosity elastomer materials were used in standard fuser roll molds, incomplete filling of the mold occurred at the mold's upper exit end due to increased flow through the mold's venting areas. A mold modification is described which allows complete elastomer coverage of the fuser roll core.

Mold 10 consists of top half 11 and bottom half 12. Tubular metal core 13 is held in the mold cavity at the left-hand input end of mold 10, and low viscosity material is introduced into annulus 14, under pressure, at the left-hand end of the mold.

At the exit end, semicircular resilient seal 15 is inserted into top mold half 11, at a position approximately 1/4 inch from the end of core 13. This area of core 13 will not be utilized in the final core application. When the mold is closed, seal 15 creates an interference fit between top half 11 and core 10.

During injection, and when the mold fills, core 10 floats upward compressing seal 15. In this way, top half 11 becomes completely filled, and air and flash are vented through the right-hand end of bottom half 12.

Disclosed anonymously.

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