Technology for preparing brake lining through 3D printing
A 3D printing and brake technology, applied in the field of rail transit, can solve the problems of limiting the comprehensive performance of non-asbestos organic brake pads, and achieve the effect of small thermal recession and good thermal recovery.
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[0022] A process for preparing a brake lining by 3D printing, comprising:
[0023] (1) Mixing: Mix the solid filler evenly by dry method, then prepare the liquid binder and other additives into a glue solution, and spray the solid filler;
[0024] (2) Powder spreading: spread the powder obtained after mixing to a thickness of 0.5 mm;
[0025] (3) Glue spraying: Mix the acetone solution of liquid phenolic resin, coupling agent and plasticizer with the dry powder composed of nitrile rubber powder and reinforcing agent, then add it to absolute ethanol and mix evenly, adjust the colloidal density to 700kg / m 3 , injection pressure 150kPa, spray glue;
[0026] (4) Hot air quick drying: dry at a temperature of 50°C for 100-130 minutes; then cut and stack;
[0027] (5) Hydroforming: hydroforming is carried out at a molding temperature of 130-170°C and a molding pressure of 18-30MPa, and the holding time is 15-30min.
[0028] The brake lining prepared by the above-mentioned proces...
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