Patent ID: 6120275
Filing Date: 2000-09-19
Classification: B29C

Abstract:
A mold for use in a gas-assisted injection molding system, the mold comprising:a first mold half;a second mold half, the first and second mold halves being movable relative to each other between an open position and a closed position, wherein the first and second mold halves define an article-defining cavity, the second mold half including a gas passageway extending to an interior surface of the second mold half in fluid communication with the article-defining cavity; anda gas pin assembly including:a housing including a head portion secured to the second mold half at the interior surface of the second mold half so that the assembly can be readily removed from the second mold half in the open position of the mold, the housing having an elongated aperture formed therethrough in communication with the gas passageway to permit the flow of gas therethrough;a porous insert having first and second ends and positioned in the aperture, the insert permitting the flow of gas therethrough but preventing the passage of molten plastic therethrough wherein the head portion engages the first end of the insert; anda holding device having a gas hole formed completely therethrough to permit the flow of gas therethrough, the holding device being removably and adjustably secured within the housing to engage the second end of the insert to hold the insert stationary within the aperture at a desired one of a plurality of possible holding positions, to permit inserts of varying sizes to be located within the aperture and to permit ready removal of the insert from the housing after the holding device has been removed from the housing.