The process and basic principles of the bottle blowing machine in the production process

The bottle blowing machine is a machine that uses the wind blown by the machine to spray out the liquid plastic and attach it to a mold cavity with a certain shape to make a product. The production process and basic principles of the bottle blowing machine are as follows:

1. The production process of the bottle blowing machine

1. Plastic parison (extruded hollow plastic tube);

2. Close the flap mold on the parison, clamp the mold and cut off the parison; 3. Blow the parison to the cold wall of the mold cavity, adjust the opening and maintain a certain pressure when cooling; 4. Open the mold and note the blown The parts; 5. Trim the flash to get the finished product.

Second, the basic principle of the bottle blowing machine

The automatic air ring structure on the bottle blowing machine adopts double air outlets, in which the air volume of the lower air outlet is kept constant, and the upper air outlet is divided into several air ducts. Each air duct is composed of air chambers, valves, motors, etc., and the motor drives the valve Adjust the opening degree of the air duct to control the air volume of each air duct.

During the control process, the film thickness signal detected by the thickness measuring probe is sent to the computer. The computer compares the thickness signal with the currently set average thickness, performs calculations based on the thickness deviation and the curve change trend, and controls the motor to drive the valve to move. When the thickness is too thick, the motor moves forward and the tuyere is closed; on the contrary, when the motor moves in the reverse direction, the tuyere increases. The cooling speed of each point is adjusted by changing the air volume of each point on the circumference of the wind ring, so that the lateral thickness of the film is deviated Control within the target range.