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Method for an on-load thermal insulating fixture for a molding machine

IP.com Disclosure Number: IPCOM000006614D
Publication Date: 2002-Jan-16
Document File: 4 page(s) / 95K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for an on-load thermal insulating fixture for a molding machine. Benefits include improved process quality, reduced mold-compound defects, and improved environmental temperature conditions.

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Method for an on-load thermal insulating fixture for a molding machine

Disclosed is a method for an on-load thermal insulating fixture for a molding machine. Benefits include improved process quality, reduced mold-compound defects, and improved environmental temperature conditions.

Background

              The conventional molding solution is POR mold technology. These commercial molding machines do not have the capability to monitor the temperature level of the pellet station. Conventional mold compounds are small pellets, typically 14 mm x 4–7 grams (weight). These compounds are loaded into the pellet vibratory bowl where they stay for a couple of hours before many of them are transferred to mold cavities. The bowl is replenished with additional pellets and the molding process is continuous. Residual hot air is released above the molding area. The station does not have an exhaust fan to expel the heat (see Figure 1).

              Mold compound viscosity characteristics and gelation time are offset by the accumulation of the residual heat. The heat accumulated (37° C) within 4 hours production time is enough to shorten the potlife of the mold compound from 24 to 16 hours, resulting in the intermittent recurrence of incomplete molding. This problem has been experienced with vfBGA products.

Description

              The disclosed method maintains the environmental conditions typically required for pelletized molding compound inside the pellet station of the automolding machine.

              The components of the disclosed method...