Abstract: Articles comprising a skin layer comprising virgin polymer and a core layer comprising a recycled polymer, along with associated systems and methods, are generally provided.
Abstract: Articles comprising a skin layer comprising virgin polymer and a core layer comprising a recycled polymer, along with associated systems and methods, are generally provided.
Abstract: Three-dimensional (3D) suction molding methods and related polymeric foam articles are described. The methods may be used in discontinuous plastication processes.
Abstract: Methods and systems of introducing blowing agent in a polymeric foam process are described. The methods and systems may be used to discontinuously introduce blowing agent in polymeric foam processes (e.g., injection molding processes) that discontinuously plasticate polymeric material.
Type:
Application
Filed:
October 23, 2017
Publication date:
April 25, 2019
Applicant:
Trexel, Inc.
Inventors:
Theodore A. Burnham, Brian S. Cockell, Samuel Edward Dix, Levi A. Kishbaugh
Abstract: The present invention provides blowing agent introduction systems and methods for introducing blowing agent into polymeric foam processing systems. The methods may involve introducing one or more doses of blowing agent into polymeric material in an extruder during a plastication period of a molding cycle. Prior to introduction, a dose is confined in an accumulator which, for example, has a volume defined between an inlet valve and an outlet valve. A control system may receive inputs related to system parameters (e.g., pressure of polymeric material in extruder, axial position of screw in barrel, whether screw is rotating, and the like) and based on the inputs coordinates operation of the valves to confine and introduce the blowing agent dose(s). The introduction systems may be used in discontinuous plasticating processes, such as injection molding and blow molding, and can be particularly useful in processes that use precise quantities of blowing agent.
Abstract: Systems and methods of processing polymer foam materials are provided. The methods involve introducing blowing agent downstream of an extruder. For example, the blowing agent may be introduced into a static mixing device positioned between the extruder and a mold. The methods may be used in connection with injection molding systems to produce high quality injection molded polymer foam articles.
Type:
Application
Filed:
October 3, 2012
Publication date:
April 3, 2014
Applicant:
Trexel, Inc.
Inventors:
Roland Y. Kim, Christopher J. Ball, Theodore A. Burnham, Levi A. Kishbaugh
Abstract: The present invention provides blowing agent introduction systems and methods for introducing blowing agent into polymeric foam processing systems. The methods may involve introducing one or more doses of blowing agent into polymeric material in an extruder during a plastication period of a molding cycle. Prior to introduction, a dose is confined in an accumulator which, for example, has a volume defined between an inlet valve and an outlet valve. A control system may receive inputs related to system parameters (e.g., pressure of polymeric material in extruder, axial position of screw in barrel, whether screw is rotating, and the like) and based on the inputs coordinates operation of the valves to confine and introduce the blowing agent dose(s). The introduction systems may be used in discontinuous plasticating processes, such as injection molding and blow molding, and can be particularly useful in processes that use precise quantities of blowing agent.