Expanded Foam Product Molding Process and Molded Products Using Same
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United States of America Patent
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Issued Date -
Nov 30, 2023
app pub date -
Oct 12, 2021
filing date -
Oct 12, 2020
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Abstract
A steam chest mold includes two mold sections defining a mold cavity and a plurality of steam tubes having steam ports positioned within the mold cavity. The mold cavity is closable to contain and compress a plurality of beads such as expanded polyolefin beads. The steam tubes pass through the beads such that steam is injected through the steam ports into the beads to facilitate localized melting and bonding o the bead interfaces to produce a water-impervious panel or billet form. The steam tubes permit bonding of interior beads in thick section billets and panels that cannot be accessed by perimeter steam sources.
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