Spring-loaded ejectors for wood strand molding

B - Operations – Transporting – 27 – N

Patent

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B27N 5/00 (2006.01) B29C 43/50 (2006.01) B29C 43/00 (2006.01)

Patent

CA 2375903

Mold apparatus and method of production and ejection of molded wood strand three-dimensionally curved articles of manufacture, molded from a loosely felted flake mat, using an ejector pin assembly within said mold apparatus having ejector pins with pin head diameters of at least about 0.750 inches or greater, that exert a loaded ejector pin pressure of from approximately about 100 psi to about 1000 psi, to eject the molded wood strand article from the mold apparatus without causing excessive indentation and densification within the mat during mold processing.

La présente invention concerne un appareil de moulage (20) et un procédé permettant de produire et de démouler des produits manufacturés moulés, incurvés, tridimensionnels, constitués de copeaux de bois, lesdits produits étant moulés à partir d'une couche de copeaux (30) faiblement feutrée. Le démoulage s'effectue au moyen d'un ensemble tiges d'éjection (10) se trouvant à l'intérieur dudit appareil de moulage (20), présentant des tiges d'éjection (11) dont les têtes (12) ont des diamètres d'au moins environ 0,750 pouces ou plus, lesdites tiges exerçant une pression de tige d'éjection à ressort d'une valeur allant d'environ 100 psi à environ 1000 psi, afin d'éjecter de l'appareil de moulage (20), le produit moulé de copeaux de bois (30'), sans provoquer la formation excessive d'empreintes ni la densification à l'intérieur de la couche durant le processus de moulage.

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