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IMPACT OF PULL SPEED ON WETOUT FOR A DETACHED INJECTION CHAMBER IN RESIN INJECTION PULTRUSION

Volumen 13, Edición 1, 2010, pp. 13-27
DOI: 10.1615/JPorMedia.v13.i1.20
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SINOPSIS

This work investigates the use of a tapered injection chamber "detached" from the pultrusion die in order to reduce the maximum resin pressures occurring inside the injection chamber; thus making the process more economical and efficient. This work also seeks to achieve complete fiber reinforcement wetout and thus produce quality pultruded parts in the resin-injection pultrusion process. Complete wetout of the dry fiber reinforcement by the liquid resin depends strongly on pull speed. Typically, higher pull speeds yield higher resin pressures inside the tapered section of the injection chamber; higher liquid resin pressures are undesirable from safety and design considerations. A 3D finite volume technique was developed to simulate the flow of polyester resin through glass rovings. Results illustrate the impact of the tapering of the injection chamber walls on the minimum injection pressure necessary to achieve complete fiber matrix wetout and the maximum resin pressure occurring inside the injection chamber. Important injection chamber design information is also presented.

CITADO POR
  1. Safonov Alexander A., Carlone Pierpaolo, Akhatov Iskander, Mathematical simulation of pultrusion processes: A review, Composite Structures, 184, 2018. Crossref

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