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Classification and principle of blowing machine
Apr 14, 2017

Blow molding machine also known as hollow blow molding, is a rapid development of plastic processing methods. Blow molding machine is the liquid plastic spray out, the use of the machine blowing out of the wind, the plastic body blow to a certain shape of the mold cavity, thus making the machine products. Plastics in the screw extruder is melted and quantitatively extruded, then through the mouth membrane molding, then there is wind-blowing cooling, then there is traction machine at a certain speed, winding machine winding it into volumes.

Product Type:

Blow molding machine can be divided into extrusion blow molding machine, injection blow molding machine and special structure blow molding machine three categories.

1, Extrusion blow molding machine: Extrusion blow molding machine is the extruder and blow molding machine and the modular body of the combination, by extrusion machine and mold head, expansion device, clamping mechanism, mold thickness control system and transmission mechanism. The mould head is one of the important parts of the blow molding product quality, usually has the lateral feeding mould head and the central feeding mould head. Large Products blow molding when the use of storage tank type die head. The minimum capacity of the storage tank is 1kg, up to 240kg. The billet thickness control device is used to control the wall thickness of the billet, the control point reaches up to 128 point, generally the 20~30 point. Extrusion blow molding machine can produce the volume range of 2.5ml~104l hollow products.

2, Injection blow molding machine: Injection molding machine and blow molding body composition, including plastic institutions, hydraulic systems, control electrical appliances and other mechanical components. The common types are three-position injection blow molding machine and four-position injection blow molding machine. Three-position machine has prefabricated billet, blowing and demoulding, each station 120 ° separated. The four-position machine is more than one pre-molding station, each station of 90 ° separated. In addition, there is a position between the two-position-180 injection blow molding machine. Injection blow molding machine production of plastic containers precise size, without secondary processing, but the cost of the mold is higher.

3, special structure blow molding machine is a blow molding machine with special shape and use hollow body with sheet, melt material and cold billet. Because of the production of the shape and requirements of different products, blow molding machine structure is also varied.


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