plastic sheet production line

plastic sheet production line Special designed screw for sheet extruder. Top brand sheet die. Various downstream equipment.

plastic sheet production lineThe LJC extruder technology  in the manufacture of precision extruders for mass production of high quality plastic sheet.

The screw thrust has an axial roll-bearing and abundantly dimensioned rolls.The connection between motor and  gear is direct, through an elastic joint, suitable for absorbing bumps and vibrations.

The extruder barrel is made by two-metal alloy; in the smaller models , is made by nitrided steel as standard, by two-metal alloy as optional.  The gear , the barrel and the motor are installed in a single structure, solidly made of electro-welded pieces. Special covers in stainless steel , easily removable, protect the heater cylinder zones.

THE EXTRUDER MOTOR is AC or DC, complete with motor-ventilator. The extruder motor is placed under the barrel to reduce overall dimensions, while the motor drive, variable speed and constant torque, is included in the general control panel of the extruder. The venting plant is made up of: liquid ring, vacuum pump, flowmeter for pump protection. A water-reclaiming  system can be optionally supplied.

The FLAT DIE can be supplied either for sheet or for plate production. The available die widths ranges from 700mm to 4000mm. The thickness varies from 0,3mm to 8 mm.

Before the flat die, a COEXTRUSION BLOCK can be inserted, to connect one or more extruders.

The LJC CALENDERS are divided into four basic models, identified by the rolls diameter.The calender is made up of a base in thermowelded laminate and a frame of thickly bolted laminate .The main structure is made up of 3 cylinders  on a vertical axis:

1st Upper cylinder, calibrator and cooler, applied on mobile arms moved by pneumatic pistons 2nd Central cylinder, calibrator and cooler, applied on rigid arms 3rd Lower cylinder, calibrator and cooler, applied on mobile arms moved by pneumatic pistons

The cylinders are chromed and then mirror-polished ; before chroming  they are coated by 3mm.thick special material , with hardness of 52-54 HRC. .Cylinders movement is by one or more AC motors; the transmission between gearbox and cylinders is by modular gears, toothed belts and epicyclical  gearboxes.

WINDERS FOR REELSWinders for reels up to 2000 mm. diameter x 1200 mm width.Winders are equipped with a safety sheet storage, useful during the sheet cutting and re-starting phases.

Suited to control and to easily adjust all the machine setting parameters.

plastic sheet production line