1. Items are different
1) Blow molding machine refers to a machine that blows bottles. The most obvious explanation is a machine that can blow plastic particles (softened into liquid) or finished preforms into bottles through certain technological means. The Bottle Blowing Machine is convenient and quick, and has a large amount of molding. After its appearance, it replaced most of the manual bottle blowing and was adopted by most beverage companies.
2) After the liquid plastic is sprayed out, the wind blown by the machine is used to blow the plastic body into a certain shape of the mold cavity 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.
2. The characteristics are different
1) Bottle blowing machine
Plastic hollow containers are widely used in beverage, medicine, cosmetics, food and chemical industries due to their light weight, low price and high safety. They attract more manufacturers to choose plastic containers instead of glass containers.
Today, the most advanced equipment, molds and raw materials in the plastics industry are all displayed in front of us. New technologies and new applications are emerging one after another. Looking at the field of plastic hollow molding, there are also fruitful results. With the soaring world oil prices, the price of plastic raw materials is also high, and the development of alternative products with low energy consumption and low raw materials is also one of the market trends.
2) blow molding machine
① The screw central shaft and cylinder are made of 38CrMoAlA chromium, molybdenum and aluminum alloy through nitrogen treatment, which has the advantages of high thickness, corrosion resistance and wear resistance.
② The die head is chrome-plated, and the screw spindle structure makes the discharge more even and smooth, and better completes the blown film. The complex structure of the film blowing machine makes the output gas more uniform. The lifting unit adopts a square frame platform structure, and the height of the lifting frame can be automatically adjusted according to different technical requirements.
③ The unloading equipment adopts peeling rotating equipment and central rotating equipment, and adopts a torque motor to adjust the smoothness of the film, which is easy to operate.
3. The principle is different
1) Bottle blowing machine
① Warm up
The preform (embryo) is irradiated by an infrared high-temperature lamp to heat and soften the preform (embryo) body part of the preform (embryo). In order to maintain the shape of the bottle mouth, the preform (embryo) mouth does not need to be heated, so certain The cooling device for cooling operation.
② Blow molding
In this stage, the preheated preform (embryo) is placed in the Blow Mold, and the inside is inflated with high pressure, and the preform (embryo) is blown and drawn into the required bottle.
Bottle blowing machines on the market are generally divided into automatic and semi-automatic.
The Automatic Bottle Blowing Machine combines the two operations of bottle blowing through the operation of the manipulator, eliminating the need for the manual process of putting the preheated preform (embryo) into the blow mold. Greatly speed up the production rate, of course, the price is also higher than the semi-automatic.
2) Blow molding machine
The structure of the automatic air ring adopts the double air outlet method, in which the air volume of the lower air outlet remains constant, and the upper air outlet is divided into several air ducts. Each air duct is composed of air chambers, valves, motors, etc., and the motor drives the valve to adjust the opening of the air duct Control the air volume of each air duct.
During the control process, the film thickness signal detected by the thickness measuring probe is sent to the computer. The computer compares the thickness signal with the current set average thickness, performs calculations based on the thickness deviation and the curve change trend, and controls the motor to drive the valve to move. When it is thin, the motor moves forward and the tuyere is closed.
On the contrary, the motor moves in the reverse direction and the tuyere increases. By changing the air volume at each point on the circumference of the wind ring, the cooling speed of each point is adjusted, so that the lateral thickness deviation of the film is controlled within the target range.
