Method for molding
OwnerJerome H. Lemelsoninventor
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Abstract
A method and apparatus for molding are provided wherein molten molding material, such as thermoplastic or thermosetting resins, metals and the like, is flowed under pressure into a closed mold cavity and wherein the instant rate of flow and pressure of the molding material are factors determining the physical characteristics of the molded articles which are formed when the material solidifies. The process involves predeterminately varying the rate of flow of molding material to the mold cavity during a molding cycle involving charging a predetermined quantity of said molding material to the mold so as to predeterminately affect and control the physical characteristics of the article molded.
Claims8
A method of molding articles of a molten molding material comprising the steps of:
- injecting a predetermined quantity of molten thermoplastic molding material into a closed cavity of a mold during a molding cycle wherein said molten thermoplastic molding material is capable of solidifying to a defined shape when it cools and is operable to begin to solidify after entering said mold cavity and wherein the physical characteristics of the article molded thereof may vary in accordance with the rate of flow of said molding material into said mold and
- during said molding cycle and as said molding material is injected into said mold cavity, predeterminately controlling the flow of said molten molding material into said mold cavity wherein the rate of flow of said molding material into and throughout said mold cavity varies in such a manner as to predetermine the manner in which said predetermined quantity of molding material solidifies throughout said mold cavity so as to provide a molded article having predetermined physical characteristics throughout the material of said molded article.
Dependencies are inferred from the claim text.