Air blowing device of bottle blowing machine

Abstract

The invention relates to an air blowing device of a bottle blowing machine. The air blowing device comprises an air inlet pipeline, wherein a switching valve and a filter relief-pressure valve are sequentially arranged on the air inlet pipeline; the air inlet pipe is connected with a first branch and a second branch; a first air valve is arranged on the first branch; a second air valve is arranged on the second branch; the first air valve is provided with a bottle blowing port and a pre-passing port; the second air valve is provided with an inner cooling port and an outer cooling port; the bottle blowing port is connected with a bottle blowing pipeline; a quick exhaust valve is arranged at the end of the bottle blowing pipeline; the pre-passing port is connected with a pre-passing pipeline; the pre-passing pipeline is connected with an air blowing pre-passing pipeline and an inner cooling pre-passing pipeline; the inner cooling pre-passing pipeline is provided with a pre-passing switching valve; the inner cooling port is connected with an inner cooling pipeline; the outer cooling port is connected with an outer cooling pipeline. The air blowing device has the advantages of simple pipeline connection, small occupied space, easy control and lower cost.

Description

technical field [0001] The invention relates to the field of blowing devices in bottle blowing machines, in particular to a blowing device in bottle blowing machines. Background technique [0002] The blow molding machine is a kind of equipment that makes plastic particles into hollow containers through the blow molding process. At present, most of the blow molding machines are still two-step blow molding machines, that is, the plastic raw materials must be made into preforms first, and then blown. system. Nowadays, the environmentally friendly plastic made of PET is generally used. [0003] The blowing device in the bottle blowing machine generally has five blowing steps: bottle blowing, blowing pre-pass, internal cooling pre-pass, internal cooling, and external cooling. The existing air blowing device is generally equipped with five air valves to complete the five air blowing steps. The air valves used are often expensive, the pipeline connection is complicated, the spac...

AI Technical Summary

Problems solved by technology

The existing air blowing device is generally equipped with five air valves to complete the five air blowing steps. The air valves used are more expensive, the pipeline connection is complicated, the space is large, the control is complicated, there are many failure points, and energy consumption is wasted.

Images