Welding of ptfe parts

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 65/50 (2006.01) B29C 65/02 (2006.01) B29C 65/74 (2006.01) B29C 53/38 (2006.01) B29C 65/14 (2006.01)

Patent

CA 2701226

During the joining of PTFE parts (10), a binder(20) is applied to the joint surfaces of the PTFE parts, e.g. by welding, before the parts are joined. By- establishing a bond between PTFE and binder in a separate, initial process, the parameters of this initial process may be determined regardless of other conditions, such as maintaining the dimensions, and the quality of this bond may be controlled and approved before the subsequent joining of the PTFE parts. During the subsequent joining, the temperature may be kept at a level, which is sufficiently low so as not to deform the PTFE material permanently, or the joining may be carried out by a process, which does not require heating, for example gluing.

Durant la jonction de pièces en PTFE (polytétrafluoroéthylène) (10), un liant (20) est appliqué aux surfaces de jonction des pièces en polytétrafluoroéthylène, par exemple par soudage, avant que les pièces ne soient réunies. Grâce à l'établissement d'une liaison entre le polytétrafluoroéthylène et le liant lors d'un processus initial séparé, les paramètres de ce processus initial peuvent être déterminés indépendamment des autres conditions, telles que le maintien des dimensions, et la qualité de cette liaison peut être contrôlée et approuvée avant la jonction ultérieure des pièces en polytétrafluoroéthylène. Durant la jonction ultérieure, la température peut être maintenue à un niveau qui est suffisamment bas pour ne pas déformer de façon permanente le matériau en polytétrafluoroéthylène, ou bien la jonction peut être effectuée à l'aide d'un processus qui ne nécessite pas de chauffage, par exemple le collage.

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