| 摘要 |
<p>Method for producing a finished thread-guiding grooved cylinder in composite material of plastic origin for spooling machines in the textile industry; finished thread-guiding grooved cylinder in composite material. a) the moulding of a RTV (Room Temperature Vulcanizing) silicone rubber cavity, contained in the casting mould; b) the subsequent moulding of the thread-guiding grooved cylinder by injection casting catalyzed polyurethane resin filled with aluminium hydroxide at 70%, the centrifugation in the mould, and the catalysis, said thread-guiding grooved cylinder being provided with overmoulded inserts; c) demoulding; d) the application of a wear-resistant coating of hard nickel by electroforming and of hard chromium by galvanic process.</p> |
