Single Screw Extrusion Casting Laminating Machine

Single Screw Extrusion Casting Laminating Machine

 

Product Introuduce

    Single-screw extrusion casting Laminating Machine is widely used in packaging, medical, new energy and other fields through the process of extrusion melting, cast filming and multi-layer laminating to convert plastic granules (e.g., PP, PE, PET, etc.) into high-precision films or laminating them with other substrates (e.g., aluminum foils, non-woven fabrics, paper).

Product Introuduce

• PLC + touch screen control system, digital setting of parameters, support formula memory function..
• Die head mold underwear rack type runner, inner runner surface chrome-plated and polished, the overall mold surface chrome-plated and acid-proof treatment.
• Roller with medium frequency quenching, polished to semi-mirror surface.
• All the pressure roller structure to install anti-pressure hand baffle (pressure rollers need to have finger protection strip, color yellow), to prevent fingers from entering here.
• Equipped with online defect detector to monitor film quality in real time.
• Equipped with suction machine, using high-speed rectifier motor, small size, strong suction, suitable for new material transportation

workflow

•  Raw material drying: polymer pellets (e.g. PE, PP, PET, etc.) need to be pre-dried to avoid moisture causing bubbles or defects.
• Melt Extrusion: The raw material is conveyed forward and melted and plasticized by means of a heated cylinder (with segmented temperature control) and shear heat.
• The melt passes through a screen (to filter out impurities) and a homogenizing section at the front of the die head to ensure uniform flow.
• Purification and dosing control: the melt then passes through a filter to remove any impurities or unmelted particles, ensuring a pure and consistent melt. Immediately thereafter, the melt dosing pump provides precise dosing of the melt to ensure a consistent melt output.
• Film forming by casting: The melt is extruded from the slit die head to form a uniform film melt curtain. The high-temperature melt curtain is quickly affixed to the low-temperature cooling rollers (chrome-plated surface, approx. 20-50°C), which are rapidly cooled and shaped. Through electrostatic adsorption or air pressure device to ensure that the film and roller surface close contact to avoid wrinkles.
• Laminating process: The pre-prepared substrate (such as paper, aluminum foil, other films) is unrolled from the unwinding device and enters the laminating station through tension control, . The composite material is heated and cured by the drying device, so that the melt and the substrate are closely combined.
• Traction and winding: The composite film is guided to the winding device through the traction rollers (maintaining constant tension) and wound into rolls. The thickness gauge continuously monitors the thickness of the material to ensure stable product quality; while the defect detection system is responsible for identifying and marking any surface defects. Real-time detection of film thickness, surface defects, transparency, etc.

Main Technical Parameters

Product Application

Flexible packaging industry: food packaging film, aluminized film, cooking bags, etc.

Medical protection: medical isolation film, protective clothing composite materials.

New energy: lithium battery separator, solar backsheet composite.

Industrial materials: building waterproof membrane, smart labeling substrate.

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