Current situation of automatic linear stretch blow molding machine in China
The stretch blow molding machines made in China appeared in 1990s. At the beginning the machine is manually operation, the automatic stretch blow molding machine made in China is near to year 2000. Nowadays, most of stretch blow molding machine factories can manufacture the automatic stretch blow molding machine. Let us see what the current situation of stretch blow molding machine is in China.
Blowing cavity numbers availability, the automatic linear stretch blow molding machine nowadays has cavity numbers from 1 to 9. For an example, Hautek machinery has machines with cavity number from 1 to 9.
Machine structures, there are some different designs from different factories. At the preform feeding, many factories adopt pneumatic turnover clampers for preform feeding. Comparing this style, New technology machine adopts the motor driving for continuous feeding style, it is better and faster. At the preform heating system, many factories use blowing cavity pitch distance for heating, which is unable to use the heating energy efficiently. New technology machine adopts minimized heating pitch, before performs go into blowing unit adopt pitch separating mechanics to increase the preform distance from heating pitch to cavity pitch. By this way, the heating energy can be used fully. Less power consume will bring more competitive ability for the producer. Hautek CP series belongs to the new technology machines.
Single cavity production capacity, most factories’ design ability is 1000bottles to 1500bottles per hour. Pneumatic driving stretch blow molding machine usually will get 1000 bottle per hour for single cavity, basing on 16grams 500ml water bottle. While servo motor driving stretch blow molding machine usually can reach a capacity of 1500bottle per hour for single cavity, the servo motor driving will including preform feeding, preform transfer, mold clamping and stretch blowing total four servo motor driving. For an example, Hautek machinery, AL-XXXX series machine is with single cavity of 1000 bottles per hour, AL-XXXX-E series machine is with single cavity of 1500 bottles per hour which is equipped with servo motor driving.
After years’ innovation and developing, some factories improved the preform feeding structure, preheating system, and mold clamping system. Optimization towards two directions, energy saving and high speed. For an example, Hautek machinery, CP series machine, design with minimized heating pitch, has the advantages of energy saving. Improved the preform transfer technology and equipped with faster mold clamping unit, has the advantage of high speed, single cavity can do 2000 bottles per hour.
Take the model of CP8-1L, the machine can produce 16grams 500ml water bottle 16000bottles per hour. With this capacity range, it will be able to meet the demand from most small and middle scale water bottling plant. It’s an ideal new technology new generation high speed linear automatic stretch blow molding machine.
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