Blow mold device

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 49/48 (2006.01) B29C 33/30 (2006.01)

Patent

CA 2454747

The shifting of the parting line between split molds due to mold tightening force is prevented. A blow mold device (11) wherein a pair of split molds forming a blow cavity (12) are a set of molds, and a plurality of such sets are attached in parallel to mold attaching plates (15, 16) with a clearance defined between adjacent sets. One split mold (13) is attached by bolts (17) inserted in bolt holes (23) in the form of loose holes in the mold attaching plate (15) in such a manner as to allow relative lateral shifting of the split mold (13) and mold attaching plate (15). The other split mold (14) is fixedly attached to the mold attaching plate (16) by positioning pins (18) and bolts (17). A joint is installed that integrally connects the two split molds to their parting surface and that is composed of a taper pin (19) and a socket (21) for preventing the shifting of the parting line.

Le dispositif de l'invention évite le glissement de la ligne de séparation entre les éléments de moule sous l'effet de la force de serrage du moule. L'invention concerne plus particulièrement un dispositif de moulage par soufflage (11) dans lequel deux demi-moules formant une cavité de soufflage (12) constituent un ensemble de moules. Plusieurs de ces ensembles sont montés en parallèle sur des panneaux de fixation de moules (15, 16) en définissant un intervalle entre deux ensembles consécutifs. L'un des deux demi-moules (13) est tenu par des boulons (17) passés dans des trous de boulonnage (23) constituant autant de trous à jeu dans le panneau de fixation de moules (15) de façon à permettre un glissement latéral relatif du demi-moule (13) par rapport au panneau de fixation de moules (15). L'autre demi-moule (14) est monté fixe sur l'autre panneau de fixation de moules (16) par des pions de positionnement (18) et des boulons (17). On dispose également d'une jointure qui relie intégralement les deux demi-moules par leurs interfaces, cette jointure étant constituée d'un pion en biseau (19) et d'une douille (21) interdisant le glissement de la ligne de séparation.

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