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Foreign Matter Detector At Mold Air Vent

IP.com Disclosure Number: IPCOM000236217D
Publication Date: 2014-Apr-11
Document File: 3 page(s) / 659K

Publishing Venue

The IP.com Prior Art Database

Abstract

The idea here is to use open/short (O/S) test pins to detect the presence of foreign matter at mold air vent area at molding process. The foreign matter may be a non-conductive material such as mold flash and rubber sheeting.

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Document Title 

Foreign Matter Detector At Mold Air Vent

   

Abstract 

The idea here is to use open/short (O/S) test pins to detect the presence of foreign matter at mold air vent area at molding process. The foreign matter may be a non-conductive material such as mold flash and rubber sheeting.

Body 

As shown in Figure 1, debris in a mold vent can block the vent and compromise the molding process, causing a defective part.  In this paper we present a probe pin and circuit that may be incorporated into the mold machine to detect the presence of foreign matter in the mold vents.

An O/S (Open/Short) test pin is inserted into a mold vent and operates in a closed loop circuit.  If there is any non-conductive foreign matter in the air vent area, the circuit will be in open loop and an error will be triggered to stop the mold machine.  The O/S test pin is incorporated in a mold cleaning tool that is used to clean the mold press after each mold shot is completed.  After roller brush cleaning of the mold chase, the O/S test pin probes an air vent area to detect the presence of non-conductive foreign matter.  If no foreign matter is detected, the circuit is in a closed loop and the mold machine is considered to be in good condition and will operate as normal.  If non-conductive foreign matter is detected in the air vent area, the circuit will be in open loop and will trigger an error signal to the system to stop the machine.

Drawings

Fig 1: Defect of incomplete fill and t...