PLASTIC ARTICLE FORMING APPARATUSES AND METHODS FOR CONTROLLING MELT FLOW IN REAL TIME USING ADDITIVES
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United States of America Patent
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Aug 25, 2016
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Aug 27, 2015
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Abstract
A process of forming molded articles using an injection molding apparatus is provided. The process includes providing a thermoplastic material to the injection molding apparatus. The thermoplastic material is heated such that the thermoplastic material is in a molten state. The molten thermoplastic material is injected into at least one mold cavity of the injection molding apparatus using an injection element. Melt pressure of the thermoplastic material filling the at least one mold cavity is monitored using a sensor. The sensor provides a signal indicative of melt pressure to a controller. The controller controls introduction of a non-reactive additive to the thermoplastic material thereby changing a viscosity of the molten thermoplastic material based on the signal. A molded article is formed by reducing a mold temperature of the thermoplastic material within the at least one mold cavity.
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