The Production Principle of Blowing Moulding Machine

Update:21 Jan 2019

The use of plastic blowing moulding machine is becoming […]

The use of plastic blowing moulding machine is becoming more and more extensive. Do you know its production principle? Today, Jilian Plastic Mould will give you a brief introduction:

Plastic blows molding machine in the production process of the blown film, wherein the longitudinal thickness uniformity can be controlled by extrusion and traction speed stability. The transverse thickness uniformity of the film is generally manufactured according to the precision of the die, in order to improve the lateral thickness uniformity of the film. The automatic horizontal thickness control system must be introduced, and the common control methods vary with the change of production process parameters: automatic die and automatic wind ring. Automatic wind is an online real-time control system, and the controlled object is distributed on the wind ring. Several motors have a double air outlet on the ring structure. The upper air inlet is divided into several air ducts. The air volume of the air outlet is kept constant. Each air duct is composed of a motor, a wind chamber, and a valve. The motor drives the valve to adjust the wind. The passage opening, the motor drives the valve to move, and when the film is thin, the motor moves forward.

The plastic pet blowing machine detects the film thickness signal transmitted to the computer by the thickness measuring probe, and the computer compares the signal with the current set average thickness, and calculates according to the trend of the thickness deviation amount, and changes the air volume of the circumference of the wind ring to make the film laterally The thickness deviation is controlled within the range of the target. The automatic air ring distributes the cool airflow sent by the fan to each air channel, and the motor drives the valve to open and close to change the cool effect of the film blank at the die discharge, thereby controlling the film thickness.

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