Equipment Configuration Description for PVC Corrugated Sheet Extrusion Production Line

This production line is specifically designed for the efficient and stable production of high-quality PVC (Polyvinyl Chloride) corrugated sheets, integrating precision machinery and intelligent control technology. The core equipment is configured according to the production process as follows:

  • Host Machine: High-Efficiency Extrusion Unit
    As the power core of the production line, a high-performance single-screw or conical twin-screw extruder is employed. Its screw is specially designed to balance strong mixing capability with high plasticizing ability, ensuring stable, high-speed melting and extrusion of PVC material (including necessary recycled material). The host machine is equipped with an ultra-quiet cooling system to ensure stability during prolonged continuous operation.
  • Melt Pump: Pressure and Flow Stabilizer
    Installed between the host machine and the die, it is used for precise metering and conveying of molten material. It effectively eliminates output pulsation caused by screw rotation, providing a continuous melt with extremely stable pressure and flow for subsequent forming. This is key to ensuring uniform longitudinal thickness of the sheet.
  • Screen Changer: Melt Filtration Device
    Typically employs a hydraulically driven or manual quick-change screen structure, allowing for online screen replacement. Its core function is to continuously filter impurities and incompletely plasticized particles from the melt, protecting the downstream precision die and significantly improving the final sheet’s purity and surface quality.
  • Die: Basic Sheet Forming Unit
    Utilizes a precision coat-hanger or fishtail flat die, often incorporating internal designs like dual restrictors. Operators can precisely control the width and overall thickness distribution of the extruded sheet by fine-tuning the die lip to meet the strict dimensional requirements of products with different specifications.
  • Three-Roll Calender: Surface Finishing and Sizing Unit
    Consists of three highly polished steel rolls with independent temperature control. The hot molten sheet extruded from the die is calendered, initially cooled, and sized into an extremely flat and smooth sheet here. This process directly affects the final product’s basic gloss and thickness consistency.
  • Roll Temperature Controller: Precise Temperature Management
    Provides independent circulating temperature control for the calender rolls and subsequent key rollers. By precisely setting and maintaining the surface temperature of each roller, the cooling rate and crystallization process of the sheet can be accurately managed, thereby optimizing its physical properties and dimensional stability.
  • Oven: Online Heating Adjustment Device
    Located after calendering and before forming. It is used to precisely reheat the initially cooled sheet, bringing it into the ideal temperature range most suitable for corrugation forming. This ensures the smooth proceeding of the subsequent corrugation process and waveform stability.
  • Corrugating Rolls: Core Unit for Imparting Structure
    Composed of one or more pairs of precisely meshing steel rolls with specific corrugation patterns. The preheated flat sheet is permanently shaped into the designed three-dimensional structures, such as wave or trapezoidal shapes, through rolling. This is a critical step in forming the product’s mechanical properties and functional characteristics.
  • Haul-Off Unit: Main Conveying Power Device
    Typically employs a multi-roll synchronized haul-off structure, providing a steady, constant pulling force for the entire sheet section from forming to cutting. Its variable frequency speed control system can be precisely synchronized with the extrusion speed, ensuring continuous and stable operation of the production line.
  • Rotary Side Trimmer: Precise Width Positioning Unit
    Installed on both sides of the production line, it utilizes high-speed rotating precision circular knives to perform online synchronous trimming of irregular or excess edge material from both sides of the sheet. This ensures precise, consistent width and smooth, flat trimmed edges for the finished corrugated sheet.
  • Shear: Fixed-Length Cutting Terminal
    Employs a servo-driven tracking cutting system (commonly known as a “flying saw” or length shear). It automatically tracks the moving corrugated sheet and performs high-speed, precise cutting at set length positions. The cuts are neat, and it often works in conjunction with an automatic stacker for finished product collection.
  • Automatic Control System: Intelligent Command Center
    Centered around an industrial PLC (Programmable Logic Controller) and integrated with a touchscreen HMI (Human-Machine Interface). This system centrally monitors and coordinates all key parameters of the entire line, such as temperature, pressure, speed, and cut length. It serves as the “brain” for achieving automated production, process repeatability, and efficient management.
  • Mixing Feeder: Raw Material Preprocessing and Supply Unit
    This device automatically and uniformly mixes PVC resin, various modifying additives (such as stabilizers, pigments, etc.), and possible recycled material. It then automatically and continuously supplies the mixture to the host machine via vacuum or screw conveyance, ensuring consistent raw material proportioning and supply stability.

Core Advantages of the Production Line

High Degree of Integrated Automation: The entire process, from automatic feeding to fixed-length cutting and stacking, is controlled by an intelligent system, significantly reducing manual reliance and improving production efficiency and consistency.

Exceptional Finished Product Quality: Through melt pump pressure stabilization, online filtration, and precise temperature control, uniform sheet thickness, a glossy surface, regular corrugations, and reliable mechanical performance are ensured.

Strong Customization Flexibility: By changing dies, corrugating rolls, and adjusting processes, sheets with different waveforms, thicknesses, widths, colors, and surface effects (e.g., co-extruded ASA weather-resistant layer) can be flexibly produced, allowing quick response to diverse market demands.

Core Product Characteristics

Excellent Physical and Chemical Properties: The product is lightweight yet high-strength, with good toughness, impact resistance, and load-bearing capacity. It possesses flame-retardant (self-extinguishing), acid and alkali corrosion resistance, and UV aging resistance.

Outstanding Functionality: The corrugated structure provides excellent drainage, thermal, and sound insulation, and options for higher light transmittance. A surface co-extruded ASA layer can greatly enhance outdoor weather resistance.

Economical and Environmentally Friendly: Easy to install, long service life, and low maintenance costs. Some materials can be recycled and reused, aligning with green building concepts.

Main Application Areas

PVC corrugated sheets are widely used in situations requiring weather resistance, corrosion resistance, and lightweight properties:

  • Industrial and Commercial Buildings: Roofing and wall panels for factory buildings, warehouses, logistics centers, and market sheds.
  • Outdoor Facilities: Carports, bus shelters, park pavilions, agricultural greenhouses, and farm enclosures.
  • Advertising and Decoration: Substrates for outdoor billboards, exhibition partitions, and interior decorative shapes.
  • Temporary Structures: Construction site fencing and temporary warehouses.

Service and Support

We provide full-cycle services ranging from project consultation, solution customization, equipment installation and commissioning, personnel training, to after-sales maintenance. This includes production formula guidance, process optimization, a one-year full machine quality guarantee, and a commitment to long-term technical support and parts supply, ensuring worry-free production for our customers.