Film blowing machine with air supplementing device as well as method for supplementing air for film bubbles

Abstract

The invention relates to the technical field of manufacturing equipment of a plastic film, in particular to a film blowing machine with an air supplementing device. The film blowing machine with the air supplementing device comprises a machine frame, a reverse Y-shaped frame, a traction roller, a traction roller driving motor and the air supplementing device; the air supplementing device comprisesa bracket, a chain transmission mechanism, a hand crank, a guide rail, a sliding block, an air cylinder, an air supplementing needle and a clutch; the air cylinder is arranged on the sliding block; the air supplementing needle is connected with a piston rod of the air cylinder; and the traction roller can drive the sliding block through the clutch and the chain transmission mechanism to perform transmission at the speed as same as the traction speed. The invention also provides a method for supplementing air for the film bubble by using the device. Compared with prior art, the film blowing machine with the air supplementing device has the following beneficial effects: the air supplementing needle and the film bubble can move at the same time through the air supplementing device, so shut-down is not needed, the production progress and the product quality are guaranteed, the energy consumption cost is reduced and the film blowing machine with the air supplementing device is simple and labor-saving in operation.

Description

technical field [0001] The invention relates to the technical field of plastic film manufacturing equipment, in particular to a film blowing machine equipped with an air supply device and a method for supplying air to film bubbles. Background technique [0002] The film blowing machine is a device that heats and melts plastic particles and then inflates and draws them into a film. There are herringbone frame and traction rollers on it. The herringbone frame is gradually narrowed from top to bottom in an inverted herringbone shape. It is used to guide the film bubble (the semi-finished product after the plastic film is inflated). The traction roller is located at the lower end of the herringbone frame and is used for traction of the plastic film. During the working process of the film blowing machine, there is often insufficient air pressure in the film bubble, which will make the inflation ratio of the plastic film unable to meet the process requirements and affect the produ...

AI Technical Summary

Problems solved by technology

During the working process of the film blowing machine, there is often insufficient air pressure in the film bubble, which will make the inflation ratio of the plastic film unable to meet the process requirements and affect the product quality

The existing air supplement method is to stop the machine, and then use the air needle to pierce the membrane bubble to supplement the air. This air supplement method has the following disadvantages: (1) It needs to be shut down, which affects the production progress; (2) The heat of the raw materials after the shutdown process causes (3) In the process of restarting the machine after replenishing the air, it may still cause gas leakage in the membrane bubble, which will affect the product quality; (4) The operation is laborious

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