Do you know about blow molding machines?

Blow molding machine is a kind of plastic processing machine. After the liquid plastic is sprayed out, the wind blown by the machine is used to blow the plastic body into the cavity of a certain shape to make a product. This kind of machine is called a blow molding machine. The plastic is melted and quantitatively extruded in the screw extruder, and then formed through the mouth film, and then cooled by a wind ring, and then a tractor is pulled at a certain speed, and the winder winds it into a roll.

Blow moulding, also known as hollow blow moulding, is a rapidly developing plastic processing method. The tubular plastic parison obtained by extrusion or injection molding of the thermoplastic resin is placed in a split mold while it is hot (or heated to a softened state). After the mold is closed, compressed air is injected into the parison to blow the plastic parison It expands and sticks to the inner wall of the mold, and after cooling and demolding, various hollow products are obtained. The manufacturing process of blown film is very similar in principle to blow molding of hollow products, but it does not use molds. From the perspective of plastic processing technology classification, the molding process of blown film is usually included in extrusion.
The blow molding process was used to produce low-density polyethylene vials during the Second World War. In the late 1950s, with the birth of high-density polyethylene and the development of blow molding machines, blow molding technology has been widely used. The volume of the hollow container can reach thousands of liters, and some production has adopted computer control. Plastics suitable for blow molding include polyethylene, polyvinyl chloride, polypropylene, polyester, etc. The resulting hollow containers are widely used as industrial packaging containers. According to the manufacturing method of the parison, blow molding can be divided into extrusion blow molding and injection blow molding. The newly developed multi-layer blow molding and stretch blow molding.
The energy saving of the blow molding machine can be divided into two parts: one is the power part and the other is the heating part. Energy saving in the power part: Most of the inverters are used. The energy saving method is to save the residual energy of the motor. For example, the actual power of the motor is 50Hz, and you actually only need 30Hz in production to be sufficient for production, and the excess energy consumption is in vain If it is wasted, the inverter is to change the power output of the motor to achieve the effect of energy saving. Energy saving in heating part: Most of the energy saving in heating part is energy saving by using electromagnetic heater, and the energy saving rate is about 30%-70% of the old resistance coil.

(1) Compared with resistance heating, the electromagnetic heater has an extra layer of insulation, which increases the utilization rate of heat energy.
(2) Compared with resistance heating, the electromagnetic heater directly acts on the material tube to heat, which reduces the heat loss of heat transfer.
(3) Compared with resistance heating, the heating speed of electromagnetic heater is more than a quarter faster, which reduces the heating time.
(4) Compared with resistance heating, the heating speed of the electromagnetic heater is faster, the production efficiency is improved, and the motor is in a saturated state, which reduces the power loss caused by high power and low demand.

The above four points are the reasons why electromagnetic heaters can save energy up to 30%-70% on the blow molding machine.