Probe assembly for injection molding apparatus

B - Operations – Transporting – 29 – C

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Details

B29C 45/20 (2006.01) B29C 45/27 (2006.01)

Patent

CA 2210259

A temperature and molding material pressure compensated probe (10) for use in injection molding apparatus (13) is disclosed. The probe includes a two-part telescoping body (34, 35) with a molding material filled space (32) therebetween. Longitudinal thermal expansion which formerly presented sealing problems only results in changes in the extent of telescoping overlap. Molding material pressure is applied equally to both probe parts tending to improve sealing. The molding material filled space has a greater transverse area than all outlets and passages.

L'invention décrit une sonde (10) à compensation de pression du matériau de moulage et de température, destinée à un appareil de moulage par injection (13). La sonde se compose d'un corps télescopique (34, 35) à deux parties, l'espace entre les deux parties (32) étant rempli par un matériau de moulage. La dilatation thermique longitudinale, qui posait auparavant des problèmes d'étanchéité, modifie seulement l'étendue du chevauchement du corps télescopique. La pression du matériau de moulage est appliquée de façon égale sur les deux parties composant la sonde, ce qui tend à améliorer l'étanchéité. L'espace rempli par le matériau de moulage présente une section supérieure à celle de toutes les sorties et de tous les passages.

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