Thermoplastic re-pultrusion
AssigneePhillips Petroleum Company
InventorWilliam H. Beever
Life of this patent
Estimating the term…
Abstract
A process for re-shaping a previously pultruded thermoplastic article having a first longitudinal cross-sectional area and a first longitudinal cross-sectional configuration into a new thermoplastic article having approximately the same longitudinal cross-sectional area but a substantially different longitudinal cross-sectional configuration.
Claims15
A process for re-shaping a previously pultruded elongated thermoplastic article having a particular longitudinal cross-sectional area and a particular longitudinal cross-sectional configuration into a new elongated thermoplastic article having approximately the same longitudinal cross-sectional area but a substantially different longitudinal cross-sectional configuration comprising:
- pulling said previously pultruded article into an elongated die, said die comprising a final forming zone having a longitudinal cross-sectional area approximately equal to the longitudinal cross-sectional area of said article and a longitudinal cross-sectional configuration substantially different from the longitudinal cross-sectional configuration of said article;
- applying sufficient heat to said previously pultruded article to soften said article sufficiently to permit it to be re-shaped;
- and
- pulling said previously pultruded article through said final forming zone of said die whereby said article is re-shaped to have a longitudinal cross-sectional area and a longitudinal cross-sectional configuration approximately equal to the longitudinal cross-sectional area and longitudinal cross-sectional configuration of said final forming zone of said die.
In a process for forming a new thermoplastic article having a first longitudinal cross-sectional area and a first longitudinal cross-sectional configuration wherein a thermoplastic feed prepreg material is pulled through a heated elongated die comprising a final forming zone having a longitudinal cross-sectional area and a longitudinal cross-sectional configuration approximately equal to said first longitudinal cross-sectional area and said first longitudinal cross-sectional configuration to form said thermoplastic feed prepreg material into said new thermoplastic article, the improvement comprising:
- employing as said thermoplastic prepreg feed material a previously pultruded thermoplastic article having a longitudinal cross-sectional area approximately equal to said fist longitudinal cross-sectional area and a longitudinal cross-sectional configuration substantially different from said first longitudinal cross-sectional configuration.
Dependencies are inferred from the claim text.