Home > Knowledge > Content
Extrusion blow molding machine
- Apr 18, 2018 -

Extrusion Blow Molding Machine for liquid plastic spray out, after using the Machine to Blow out of the wind, blowing plastic body attached to a certain shape of the cavity, which made the product, this Machine is called a Blow Molding Machine.The plastic is melted and quantified in the screw extruder, and then it is formed through the mouth mold, then the wind ring is cooled, and then the tractor is pulled at a certain speed, and the winding machine turns it into a coil.

Basic information 

extrusion blow molding machine also called hollow blow molding, a rapid development of plastic processing methods.Thermoplastic resin by extrusion or injection molding of plastic parison tube, hot, put in split cavity, mold closing immediately after ventilation with compressed air within the parison, make plastic parison swell and clingy wall in the mold, the cooling mold release, the products have all kinds of hollow.Blown film manufacturing technology on the principle and hollow blow molding is very similar, but it does not use the mould, from the perspective of classification of plastics processing technology, molding process is usually included in the extrusion of blown film.The blow molding process was used in the production of low density polyethylene bottles during world war ii.In the late 1950s, with the birth of high density polyethylene and the development of blow molding machine, blow molding technology was widely used.The volume of hollow containers can reach thousands of litres, and some of them have been computerized.It is suitable for blowing plastic with polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the empty container is widely used as an industrial packaging container.According to the method of moulding, blow molding can be divided into extrusion blow molding and injection blow molding, new development of multi-layer blowing and stretching blow molding.

Energy saving utility can be divided into two parts: the power part and the heating part.

Energy-saving power parts: mostly adopts frequency converter, motor energy saving way is by saving more energy, the real power of the motor is 50 hz, for example, and in production, in fact, you only need 30 hz enough production, that extra energy is wasted, the inverter is to change the motor power output to achieve the effect of energy saving.Heating part energy saving: most of the energy saving of heating is energy-saving with electromagnetic heater, and the energy saving rate is about 30% to 70% of the old resistance circle.

1. Compared with the resistance heating, the electromagnetic heater has a layer of insulation layer, and the thermal energy efficiency is increased.

2. Compared with the resistance heating, the electromagnetic heater directly ACTS on the heating of the material tube, reducing the heat transfer heat loss.

3. Compared with the electric resistance heating, the heating speed of the electromagnetic heater is more than 1/4, which reduces the heating time.

4. Compared with the electric resistance heating, the heating speed of the electromagnetic heater is faster, and the production efficiency is increased, so that the motor is in the saturated state, which reduces the power loss caused by high power and low demand.The above four points are the reason why it can save 30% to 70% on the blow molding machine.