Differential friction plate for double-twisting machine and machining method of differential friction plate

The invention discloses a differential friction plate for a double-twisting machine and a machining method of the differential friction plate. The friction plate is mainly formed by machining and manufacturing the following raw materials including, by mass percent, 50%-80% of teflon, 15%-45% of tin bronze powder and 2%-6% of carbon fibers. The machining method includes the following steps that firstly, materials are mixed, wherein a material mixer is used for evenly mixing the raw materials; secondly, pressing is conducted, wherein the raw materials are put into a die to be pressurized, the pressurizing pressure ranges from 30 MPa to 80 MPa, and the pressure maintaining time ranges from 30 min to 100 min; thirdly, sintering is conducted, wherein a modified teflon blank formed in a die pressing manner is put into a high-temperature sintering furnace to be sintered; fourthly, machining is conducted, wherein machining is performed till the size and the shape which are required by the double-twisting machine are