Film stretching device

The utility model discloses a film stretching device, including frame and spiral micrometer, frame includes first baffle plate, second baffle plate, connect the connecting rod of first baffle plate and second baffle plate and can slide along the sliding plate of connecting rod, the first baffle plate is equipped with third through hole, spiral micrometer includes micrometer screw, knob, fine tuning knob and shell, the micrometric screw penetrates through the third through hole and abuts against the sliding plate, the shell is connected with the first baffle, the first baffle is provided with a first pressing strip used for clamping one end of the film, and the sliding plate is provided with a second pressing strip used for clamping the other end of the film. Compared with the prior art, the film stretching device has the advantages that the stretching distance of the micrometric screw rod can be accurately and quantitatively adjusted by controlling the knob and the fine tuning knob on the micrometer caliper,