Polytetrafluoroethylene gasket preparation device

The utility model belongs to the technical field of polytetrafluoroethylene gasket production devices, and discloses a polytetrafluoroethylene gasket preparation device. The pipe cutting machine is mainly technically characterized by comprising a frame body, a pipe positioning and rotating mechanism, a cutting mechanism and a control mechanism, the pipe positioning and rotating mechanism comprises a main shaft sleeve and a positioning sleeve located on the radial outer side of the main shaft sleeve, a transmission wheel is fixed to the main shaft sleeve and is in power connection with a main shaft driving motor through a transmission chain, a clamping head is arranged at the front end of the main shaft sleeve, and the rear end of the clamping head is connected with a rotary oil cylinder through a connecting sleeve. The polytetrafluoroethylene pipe is inserted into the connecting sleeve and the clamping head, the clamping head is controlled to be locked and loosened through the rotary oil cylinder, the inner d