The working principle of cast film extruder

The working principle of the cast film extruder is to add plastic pellets into the hopper, plasticize and melt the plastic pellets through a single-screw extruder, and then come out from the die head of the main machine, and then pass the auxiliary casting machine for auxiliary casting, Forming such as trimming, rolling and rolling. The auxiliary machine module is mainly composed of casting roller, traction roller, traction roller pressing mechanism and winding, etc. The specific working principle is explained as follows:

1. Casting roller:

(1) Each power roller is independently driven by a servo motor, the roller speed is finely controlled, and the synchronization performance is good;

(2) The height of the casting roller can be adjusted up and down, which can meet the technological requirements of casting and molding of materials with different solution strengths;

(3) The hard chrome-plated mirror roller is equipped with a 304 stainless steel roller core, with high surface finish and no rust;

(4) Built-in circulating water cooling, precise control of casting roll temperature.

2. Traction roller pressing mechanism: The traction roller pressing mechanism is composed of buttons and cylinders. The gap between the upper roller and the lower roller is adjusted through the touch screen buttons. When the pressing button is pressed, the lower roller is pressed upward; when the release button is pressed, the lower roller retreats. After pressing the traction roller, the surface of the traction roller will elastically deform to compress the thin strip between the two rollers, and drive the thin strip to move in the horizontal direction under the action of friction. The moving speed of the thin strip can be controlled by The rotation speed of the upper roller can be adjusted.

3. Traction roller: The traction roller is composed of upper and lower rollers, the upper traction roller is driven by an independent motor, and the speed is infinitely adjustable. The surface of the lower roller is covered with silica gel, the material is soft, and the lower roller can be moved up and down by controlling the air cylinder.

4. Rewinding roller The rewinding roller is driven by an independent torque motor, with adjustable speed, built-in air pressure device, sleeves the paper tube on the roller, and then fills the air to increase the friction between the paper tube and the roller, and the roller drives the paper tube to wind up. roll.