초록 ▼

A process of making a hollow article from polymeric material is taught. The article is molded in two parts. The two parts are caused to remain in their respective exterior molds. If the hollow article is to be filled with a desired material, a measured amount of filler material is added to one of th

A process of making a hollow article from polymeric material is taught. The article is molded in two parts. The two parts are caused to remain in their respective exterior molds. If the hollow article is to be filled with a desired material, a measured amount of filler material is added to one of the formed parts. The exterior molds are brought into opposed position and sealing relationship. The space between the exterior molds is purged with a purging gas and subjected to a partial vacuum. The exterior molds are then closed and subjected to a clamping pressure to join the part halves together and remove flash from the joint. Portions at least of the exterior molds are heated and then cooled. The exterior molds are then opened, and the finished filled article is removed therefrom.

대표청구항 ▼

A process of making a hollow article from moldable plastic material and filled with a filler substance comprising the steps of molding two parts using at least an exterior mold for each part, which parts, when joined at their peripheries, will constitute said article, causing said parts to remain in

A process of making a hollow article from moldable plastic material and filled with a filler substance comprising the steps of molding two parts using at least an exterior mold for each part, which parts, when joined at their peripheries, will constitute said article, causing said parts to remain in their respective exterior molds, bringing said exterior molds into opposed position, locating said filler substance in one of said parts, sealing said exterior molds together when in opposed position and prior to complete closure thereof, subjecting the space between the exterior molds with the parts therein to a partial vacuum, thereafter purging said space with a gas non-reactive to said filler material and said parts, and again subjecting said space to a partial vacuum prior to closing said exterior molds, closing said exterior molds and subjecting them to a clamping pressure to join said parts about their peripheries and to remove flash therefrom, heating parts at least of said exterior molds, cooling said exterior molds, opening said exterior molds and removing therefrom said article.