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1. (WO2018060034) PUMP DIAPHRAGM

Pub. No.:    WO/2018/060034    International Application No.:    PCT/EP2017/073841
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Fri Sep 22 01:59:59 CEST 2017
IPC: F04B 15/02
F04B 43/00
F04B 43/02
Applicants: DÄTWYLER SCHWEIZ AG
Inventors: DIEZ DIAZ, Maria Del Mar
RANDLER, Rudolf
KÄLIN, Raphael
HABERLAND, Norbert
Title: PUMP DIAPHRAGM
Abstract:
The invention relates to a pump diaphragm (1) for a diaphragm pump for conveying a fluid, comprising a solid core (3) with a connection device (4) for a drive rod of the diaphragm pump, and a plate-shaped elastic diaphragm body (2) made of rubber having a peripheral clamping edge (6). plaThe solid core (3) is embedded at least partially in the diaphragm body (2), and, according to the invention, the solid core (3) is produced from a thermoplastic and forms covalent bonds with the elastic diaphragm body (2) made of rubber without adhesive. For this purpose, the thermoplastic, for example polyamide 612 or polyphenylene ether, and the rubber, a periodically cross-linked rubber such as EPDM, are selected in such a way that they are covalently cross-linked with one another at the boundary layer. In this way, a bonding layer that is susceptible to weakening or destruction is not present between the core and the diaphragm body.