PVC Sheet Extrusion Machine Line

The PVC sheet extrusion machine line is an equipment that continuously processes PVC mixture into flat materials of a certain width and thickness through processes such as extrusion and rolling. Its core is to select and configure equipment based on the requirements of the final product (hard/soft, transparent/opaque, thickness, surface gloss, etc.).

 

PVC sheet

 

pVC sheet

pVC sheet

pVC sheet

Characteristics: Hard PVC sheet extrusion line (such as advertising boards, stationery covers, equipment liners) Soft PVC roll extrusion line (such as floor leather, automotive interiors, canopy fabrics) PVC calendered sheet line (such as high-end LVT flooring, transparent hard sheets, furniture films)

Core process extrusion+three roll calendering extrusion+three roll calendering multi roll rolling

The formula features no or a small amount of plasticizers, a large amount of plasticizers, and a variety of soft formulas for both hard and soft materials

Product features: high hardness, high strength, uniform and soft thickness, rollable, embossing surface, extremely smooth surface, highest thickness accuracy, and good optical performance.

Core equipment: Parallel twin-screw extruder+T-shaped die head+three roll calender Parallel twin-screw extruder+T-shaped die head+three roll calender Multiple extruders+four roll or five roll calender.

Typical products include advertising boards, printing pads, chemical tank lining flooring leather, car mats, inflatable toys, high-end LVT flooring for soft door curtains, transparent packaging sheets, and furniture decorative films.

1. Raw material processing system

·High speed hot and cold mixers: This is the standard starting point for the production of all PVC products. Mix and cool PVC resin, stabilizer, plasticizer (for soft materials), filler, color powder and other raw materials at high speed according to the formula to form a uniform dry mixture.

·Automatic metering and conveying system: the key to ensuring accurate and stable production ratio.

2. Extrusion system

·Extruder:

·Parallel and co rotating twin-screw extruder: This is currently the absolute mainstream for sheet extrusion. Very suitable for the processing of PVC powder, with good mixing and plasticizing effect and high yield.

·Conical twin-screw extruder: more suitable for the production of high filling formulas such as SPC flooring.

·Single screw extruder: can be used for processing certain specific or small quantities of pellets.

·Mold:

·Hanger style T-shaped mold head: core component. Expand the molten material flow extruded by the extruder into a uniform sheet with the required width and thickness. The opening of the mold lip can be finely adjusted to control the lateral thickness of the sheet.

3. Shaping and cooling system - this is the key to distinguishing different types

·For the extrusion line (three roll calendering):

·Three roll calendering machine: The molten billet coming out of the T-shaped die is immediately introduced into the roller gap of the three roll calendering machine. By rolling with three high-precision rollers that can be cooled internally, the sheet is shaped, compacted, and the thickness is controlled to give it a surface gloss (mirror rollers can give a smooth surface, matte rollers can give a matte surface). The arrangement of the three rollers (such as upright, L-shaped, Z-shaped) can be selected according to the process requirements.

··For the rolling line:

·Multi roll rolling mill (four roll/five roll): Multiple extruders (such as 2-3 units) feed the rolling mill, and the molten material is repeatedly rolled, plasticized, and stretched between several large-diameter, high-precision heating rollers. This is the highest precision shaping method, capable of producing sheets with extremely small thickness tolerances (± 0.02mm) and extremely smooth surfaces. The technical difficulty and investment are the highest.

4. Auxiliary equipment (optional according to product requirements)

·Traction device: Provides stable tension to pull the sheet out of the production line.

·Online printing device: used for printing patterns on the surface of sheets.

·Surface embossing device: used for producing textured sheets (such as leather grain, wood grain).

·Cooling bracket: For thick or hard plates, a longer cooling path is required to fully dissipate heat and prevent deformation.

·Edge material recycling system: immediately crush and recycle the cut waste edges, integrate them into the main material flow, and reduce costs.

5. Rolling or cutting stacking system

·Winder: Used for soft PVC rolls. Adopting central winding or surface winding, with automatic tension control.

·Fixed length cutting and stacking machine: used for hard PVC sheets. Cut the continuous sheets into fixed lengths using a flying saw or shearing machine, and then automatically stack them into stacks

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