Device for the surface treatment of hollow glass bodies

C - Chemistry – Metallurgy – 03 – C

Patent

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Details

C03C 17/245 (2006.01) C03C 17/00 (2006.01)

Patent

CA 2208414

The invention concerns a device for the surface treatment, in particular the final heat coating of hollow glass bodies, using a carrier gas enriched with coating materials. The device comprises a tunnel-shaped vaporisation hood with a conveyor belt which extends along the floor region of the hood and transports the hollow glass bodies, and with apertures along the sides and separated by spacer elements, these apertures being used for the alternate expulsion and drawing in of the carrier gas which flows around the hollow glass bodies and produces a metal oxide layer on the surfaces thereof. To prevent excessive heating of the spacer elements which would cause the coating materials to overheat and break down, and to prevent the build up of deposits and uneven speed distribution with the associated drawbacks, the intermediate elements are formed by tubular bodies which can be pressurized by a coolant stream (4).

L'invention concerne un dispositif de traitement de surface, notamment de traitement de surface à chaud de récipients en verre, au moyen d'un gaz porteur enrichi en agents de traitement. Ce dispositif comprend une hotte de vaporisation en forme de tunnel, avec une bande convoyeuse s'étendant dans le sens longitudinal au fond de la hotte et servant au transport des récipients en verre, ainsi que des ouvertures ménagées sur les côtés et séparées par des éléments d'écartement, ces ouvertures servant à expulser et à aspirer alternativement le gaz porteur qui circule autour des récipients en verre et produit une couche d'oxyde métallique sur les surfaces des récipients en verre. Les éléments d'écartement sont constitués de corps (4) tubulaires exposés à un flux de réfrigérant, ce qui permet d'éviter un échauffement excessif des éléments d'écartement, une surchauffe et par conséquent une décomposition des agents de traitement, la formation de dépôts, une répartition hétérogène de la vitesse et les inconvénients associés.

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