Today Kunshan blow molding processing Fulong small series for us to describe the basic operating principles of blow molding processing
After the liquid plastic is first sprayed out, the wind blown by the machine is used to blow the plastic body to the mold cavity of a certain shape, and then the product is made. The plastic is melted and quantitatively extruded in the screw extruder, and then it is formed through the mouth film, and then the wind ring is blown and cooled, and then the tractor pulls at a certain speed, and the winding machine winds it into a roll.
Operation process of large blow molding machine:
The active air ring structure adopts the double tuyere method, during which the air volume of the inferior mouth is stable, and the circumference of the upper tuyere is divided into several air channels, each air channel is composed of air chamber, valve, motor, etc., and the motor drives the valve to adjust the opening degree of the air channel and control the air volume of each air channel. During the control process, the thickness signal detected by the thickness measuring probe is transmitted to the computer, the computer compares the thickness signal with the average thickness set at that time, calculates according to the thickness error and curve change trend, controls the motor to drive the valve to move, when the film is thicker, the motor moves forward and the tuyere closes down; On the contrary, the motor moves in the reverse direction, the tuyere increases, and the cooling speed of each point is adjusted after changing the air volume of each point on the circumference of the wind ring, so that the transverse thickness error of the film is controlled at the target scale.
