Synthetic resin assembly having diaphragm member(s) clamped

F - Mech Eng,Light,Heat,Weapons – 02 – M

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Details

F02M 37/12 (2006.01) F02M 37/04 (2006.01) F04B 43/00 (2006.01) F04B 43/06 (2006.01)

Patent

CA 2217772

An O-ring shaped annular rib (63) is disposed around the outer periphery of a flexible diaphragm member (62), and grooves (70, 71) are formed in first and second resin members (60, 61) for receiving the annular rib (63) in the compressed state. A hollow space is defined between the first and second members (60) for holding the diaphragm (62) in the clamped state. A contact surface (64) where the first and second synthetic resin members (60, 61) come into contact with each other, is located outward of the grooves (70, 71), and is subjected to welding with a supersonic welding tool (65). A gap (76) is formed between the first synthetic resin member (60) and the supersonic welding tool (65), which gap disappears as the welding progresses. At this time, further progress of the welding operation is inhibited by allowing the first synthetic resin member (60) and the supersonic welding tool (65) to provide a predetermined compression for the annular rib (63). Alternatively, a metallic spacer (77) is interposed between the first synthetic resin member (60) and the second synthetic resin member 61 with a gap (78) between the second synthetic resin member (61) and the metallic spacer (77) prior to a welding operation, which gap (78) disappears as the welding operation progresses, until further progress of the welding operation is halted.

Une membrane flexible (62) est pourvue, au niveau du bord périphérique externe, d'une nervure de renforcement annulaire (63) de type joint torique d'étanchéité, et des rainures (70, 71), dans lesquelles la nervure de renforcement annulaire (63) est maintenue par compression, sont formées entre des premier et second éléments (60, 61) en résine synthétique qui retiennent la membrane. Une partie, se trouvant sur le côté extérieur des rainures (70, 71) retenant la nervure annulaire de renforcement (63) et comportant les premier et second éléments (60, 61) en résine synthétique en contact l'un avec l'autre, est fondue au moyen d'un appareil de fusion ultrasonique (65). Un écartement (76) est créé entre le premier élément (60) en résine synthétique et l'appareil de fusion ultrasonique (65), et l'opération de fusion est mise en route afin de combler l'écartement (76) et de mettre en contact le premier élément (60) en résine synthétique et l'appareil de fusion ultrasonique (65). La progression de l'opération de fusion est bloquée par la compressibilité de la nervure de renforcement annulaire (63) restant constante. Selon une autre réalisation, un espaceur métallique (77) est placé entre les premier et second éléments (60, 61) en résine synthétique, et des vides (78) sont formés dans un (61) des éléments en résine synthétique et l'espaceur métallique (77) avant de procéder à l'étape de soudage. Au fur et à mesure de la progression de la fusion, les vides (78) sont éliminés. Ceci empêche la progression de la fusion et fixe la compressibilité de la nervure de renforcement annulaire (63) à un niveau constant.

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