Downstream production line auxiliaries

                                                   Downstream production line auxiliaries


      Thickness measurement device: In the high-speed continuous production process, cast film thickness measurement must be non-contact automatic tracking. Most of the current use of radioisotopes such as beta ray or infrared radiation thickness gauge, thickness gauge in the third chapter has been described. The detector reciprocates transversely to measure the film thickness, comparing the target value with the true value, showing the deviation, positive and negative tolerances and the average value on the screen. Measured data can be automatically fed back to the computer for processing, processing automatically adjust the process conditions. However, the current manual or mainly to adjust the process parameters.
      Tension measurement and vibration control: In the production of cast film, due to the delivery and coiling, the transmission system should be able to provide a constant torque, the use of SCR rectifier DC motor can achieve this requirement. One way to measure film tension is to measure the motor torque in direct proportion to the drag current of the motor, which is calculated from the armature current and from the armature voltage. The structure of the load cell controller is shown in Figure 7-14, which records the tension of the film in front of the towing unit and signals the control system. To avoid excessive tension during film transport, the web tension needs to be measured using a roller system or a roller in the load-sensing pick-up shaft. Before the product is cut and rewound, the film is vibrated in the direction of extrusion to change the width. Membrane movement path and vibration device can be horizontal and vertical installation. The vibrating device is located behind the thickness measuring device.
      Slitting device: Extruded film as a result of "thin neck" (film width less than the width of the head) will make the edge of the film is too thick, it is necessary to remove the film edge, in order to ensure that the end of the film roll neat surface formation. Trimming the edge of the scrap material can be used to roll the machine into a tube, suction can also be used aspirated, where the trimming material is a cleaning material, can be directly sent to the crusher for recycling. Cast film width is very wide, the manufacturer must be based on user requirements cut the film into a certain size. There is a pre-towing device between the radial slitter and the towing device so that the tension required for the film to be cut and delivered is independent of the take-up tension.

  • 18/12/2017
  • Recently
Click here to view Previous or Next

Related News

Cost-effective industrial laminate

Cost-effective industrial laminate

  • 13/02/2019 09:10:01

The cheapest industrial laminates (Class X) are used in large quantities where the dielectric properties are less important. It is made from unbleached kraft paper and about 30% phenolic resin. It has …

Read more

Casting PA film and production technology

Casting PA film and production technology

  • 21/12/2017 09:33:12

Casting PA film and production technology 1. Casting PA film and its raw materials used: PA film has the advantages of high strength, good toughness, good transparency, good heat resistance and cold…

Read more

Cast film mechanical winding device

Cast film mechanical winding device

  • 19/12/2017 09:21:48

Cast film mechanical winding device Corona treatment device: cast film after corona treatment, can improve the surface tension of the film to improve the printing of the film and together with other…

Read more

Casting film production line in the cooling device

Casting film production line in the cooling device

  • 15/12/2017 10:03:16

Casting film production line in the cooling device Casting production line in the cooling device mainly by the rack, cooling roller, peel roller, refrigeration system and air knife, auxiliary device…

Read more

Hot News

Film composite technology

Film composite technology

Film composite technologyMulti-layer composite film or film and aluminum foil, paper multi-layer composite material, in terms of air barrier properties, heat sealability, printability, peel strength, hygiene and economic rationality, there is a significan

Calendered film and hard sheet

Calendered film and hard sheet

Calendered film and hard sheetCalendering is a method in which a thermoplastic film of two or more phases is compression molded between rotating rolls to produce a continuous film or sheet.In the field of plastic processing, the extrusion method is the ma

Extrusion theory and characteristics of extrusion

Extrusion theory and characteristics of extrusion

The flow theory of plastics in the extrusion process: The modern ordinary extrusion theory is based on the three basic functions of solid transportation, melting and melt transportation. Thus, a conventional screw includes three functional segments: a sol

Thermoforming of plastics

Thermoforming of plastics

Thermoforming of plasticsThermoforming is a method of making plastic articles using sheets of thermoplastics as a raw material. When manufacturing, the sheet cut into a certain size and a fixed shape is first clamped on the frame and heated to a thermoela

The general principle of blow molding

The general principle of blow molding

The general principle of blow molding can be summarized as the blowing of compressed air into a molten parison, which is laterally inflated, pressed against the sub-mold type control surface, and cooled to form a hollow product. Therefore, blow molding ge

Tags