초록 ▼

A method for the compression molding of a plastic article is provided. The method includes the steps of loading plastic material, that is preferably unheated, into a two piece molding chamber having at least one heating element, closing the molding chamber, and heating the plastic element. The metho

A method for the compression molding of a plastic article is provided. The method includes the steps of loading plastic material, that is preferably unheated, into a two piece molding chamber having at least one heating element, closing the molding chamber, and heating the plastic element. The method further includes the step of injecting fluid, for example air, into the plastic material to create at least one cavity within the plastic material. The air may be injected directly into the plastic material, or it may be injected along an upper surface of the chamber. Upon injection of air into the at least one cavity, a portion of the plastic material is forced to exit the chamber.

대표청구항 ▼

A method for the compression molding of a plastic article is provided. The method includes the steps of loading plastic material, that is preferably unheated, into a two piece molding chamber having at least one heating element, closing the molding chamber, and heating the plastic element. The metho

A method for the compression molding of a plastic article is provided. The method includes the steps of loading plastic material, that is preferably unheated, into a two piece molding chamber having at least one heating element, closing the molding chamber, and heating the plastic element. The method further includes the step of injecting fluid, for example air, into the plastic material to create at least one cavity within the plastic material. The air may be injected directly into the plastic material, or it may be injected along an upper surface of the chamber. Upon injection of air into the at least one cavity, a portion of the plastic material is forced to exit the chamber. gh a reciprocal pin into said plastic material creating at least one cavity within said plastic material. 11. The method of claim 10 wherein said plastic material contains reinforcing fibers. 12. The method of claim 10 wherein the volume of said plastic material is less than the volume of said closed molding chamber. 13. A method for the compression molding of a plastic article comprising: loading viscous heterogeneous plastic material into a two piece molding chamber having a pair of interior mold surfaces and having an open position and a closed position, closing said molding chamber compressing said plastic material to conform to said mold surfaces; and injecting fluid along said upper surface of said chamber while maintaining said molding chamber in said closed position. 14. The method of claim 13 wherein said plastic material contains reinforcing fibers. 15. The method of claim 13 wherein the volume of said plastic material is less than the volume of said closed molding chamber.