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    Industry dynamics Location:Home >> News >> Industry dynamics >> Detailed content

    Mao Xin's answer - a brief talk on the design features of film blowing machine

    release time:2016-04-19  viewed:776次
    1、 Basic characteristics
    The film blowing machine is used to blow low density polyethylene (LDPE), high density polyethylene (HDPE) and linear low density (LLDPE) plastic films, and its grip is used for the internal and external packaging of civil and industrial products.
    2、 Design features of machinery
    The film blowing machine is mainly composed of extruder, head, die head, cooling device, foam stabilizing frame, herringbone plate, traction roller, coiling device, etc. copyright dedecms
    1. Extruder
    It is mainly composed of screw, barrel, feeding hopper, reducer and driving motor. The reducer is driven by belt. The reducer drives the screw to rotate in the barrel. The screw adopts a special structure, that is, a special mixing device is equipped in a certain section of the screw.
    2. Head dedecms.com
    It is mainly composed of three parts: head cover, filter screen and filter plate. In order to adapt to the production of plastic raw materials with more impurities, some machines adopt the right angle head structure with larger filtering area, and at the same time, considering that the mixture, regeneration material, high pressure and low pressure have larger power viscosity, the flow passage design of the material is reasonably selected. Content from dedecms
    3. Cooling device
    It is mainly composed of cooling air ring, blower, etc. the cooling air ring is an external cooling adjustable air ring, and it can adjust the opening degree of the air inlet, which is convenient for operation and is conducive to the control of film thickness and uniformity.
    4. Bubble holder
    It mainly adopts the fixed ring and the fixed rod adjustable structure to stabilize the foam frame, which has a large adjustment range, convenient operation and adjustment, and stable foam tube, so as to create conditions for the flat coiling of the tube.
    5, die head
    According to the particularity of high pressure, low pressure, mixture and recycled polyethylene materials, the main technical parameters such as helix angle, recession angle, setting angle length and die opening are designed and optimized through multiple comparative tests, which has the advantages of large internal pressure, stable and uniform extrusion, good film strength performance, good matching of no stitching line with the extruder of this unit, etc.
    6. Traction auxiliary equipment dedecms.com
    It is mainly composed of traction frame, herringbone plate, traction roller, coiling mechanism and traction motor. The traction motor adopts electromagnetic slip motor, which drives two pairs of traction rollers through the deceleration part and the coiler at the same time.
    7. Air compression dedecms.com
    It mainly outputs compressed air and sends the storage tank to enter the center hole of the die head spiral mandrel through the outlet valve of the storage tank. The die head is equipped with a pressure regulating valve to adjust the air volume and air pressure according to the size requirements of the products. The gas enters the center of the foam tube through the center hole of the mandrel, and the plastic is blown out to form the foam tube shaped film.
    8. Electrical control copyright dedecms
    It is mainly equipped with unit operation cabinet. The main power button is used to connect the main power and turn on the motor switch. The electric heating of fuselage, tee joint and die can be controlled by button switch respectively. Thermocouple automatic temperature measurement and automatic temperature controller are used for key parts. In normal production process, the temperature can be automatically controlled to ensure stable and reliable production process.
    Editor: Guangdong Maoxin electromechanical Co., Ltd

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