PP Hollow Corrugated Sheet Machine | 1220–3000mm Width, 2–12mm Thickness, Up to 70% CaCO₃ Filler Compatible

PP Hollow Corrugated Sheet Machine by Qingdao Tongsanhegu

Qingdao Tongsanhegu Plastic Machinery Manufacturing Co., Ltd. specializes in PP hollow corrugated sheet machine manufacturing with more than 20 years of industry experience. Our annual production capacity exceeds 100 extrusion lines, and our machines have been exported to over 20 countries and regions. The company is ISO 9001 certified, and our production lines are CE compliant.

Our PP hollow corrugated sheet machine is designed for continuous production of hollow grid sheets and corrugated plastic sheets from PP, PE, PC, and phosphogypsum-based materials. The line delivers sheets with uniform wall thickness, straight internal ribs, and a smooth surface finish, suitable for packaging, logistics, construction, advertising, and industrial applications.

Key compatibility: The production line supports up to 30% recycled PP and up to 70% calcium carbonate (CaCO₃) filler masterbatch, helping manufacturers significantly reduce raw material costs without compromising sheet quality.

What does a complete PP hollow corrugated sheet production machine consist of?

1. Extruder — The Core of the Line

The extruder heats, plasticizes, and presses PP raw material into a homogeneous melt. Our PP hollow corrugated sheet machine uses a specially designed screw to ensure complete plasticization and stable output. Temperature control zones maintain consistent melt quality throughout long production runs.

Single-screw and co-extrusion configurations are available depending on material formulation and output requirements. The co-extrusion option enables filler ratios of 20%–60% for cost-competitive sheet production while maintaining surface quality and rib integrity.

2. Die Head — Determines Shape and Dimensions

The die head is the critical component that determines the hollow structure, sheet width, and wall thickness distribution of the final product. Our dies use high-quality alloy lips and adjustable restrictor bars to deliver uniform melt pressure across the full width. Die precision directly affects thickness uniformity, with parallelism tolerances recommended below 0.01mm for high-quality sheet.

3. Cooling and Calibration Unit — The Key to Dimensional Stability

The calibration unit solidifies the extruded sheet and locks in its final dimensions. Our PP hollow corrugated sheet machine uses vacuum calibration with controlled cooling water circulation. Cooling speed must be precisely managed:

Too fast: Surface cracks and internal stress

Too slow: Reduced line speed and lower output

Precise cooling control ensures uniform upper and lower wall thickness and neatly formed internal ribs.

4. Haul-Off Unit — Ensures Continuous Production

The haul-off unit pulls the cooled sheet at a constant speed matched to the extrusion rate. Primary and secondary haul-off configurations maintain dimensional accuracy and prevent sheet deformation during downstream processing.

5. Cutting Machine — Length Accuracy

The cutting unit delivers fixed-length cuts according to customer specifications. Flat cutting and cross-cutting modes are available, with automatic length control for consistent finished dimensions.

6. Edge Trimming Device

Trims excess material from both edges of the sheet to achieve precise width tolerances. Trimmed material can be recovered and reintroduced into the production process.

7. Optional Modules

Hot oven: Secondary setting and stress relief for improved flatness and dimensional stability

Film laminating unit: Surface film application for enhanced appearance and protection

Fast screen changer: Rapid filtration of raw material contaminants to minimize downtime

The production process for PP hollow corrugated sheet follows a continuous sequence:

1.Extrusion: Raw material is heated and plasticized, then forced through the die to form the basic hollow structure.

2.Calibration and cooling: The extruded sheet passes through vacuum calibration and controlled cooling to solidify its dimensions.

3.Haul-off: The sheet is pulled at a constant speed to maintain continuity and dimensional accuracy.

4.Cutting: The sheet is cut to the required length.

5.Optional post-processing: Hot oven setting, film lamination, and edge sealing for downstream box-making applications.

PP hollow corrugated sheets produced on our machines are typically 2–8mm thick and can be customized with anti-static, conductive, flame-retardant, or colored formulations to meet specific application requirements.

PP hollow corrugated sheets produced on our machines are widely used across:

Packaging and logistics: Turnover boxes, knife cards (partition boards), bottle trays, cushioning packaging, pallets

Logistics and transport: Cargo packaging, dividers, trays

Advertising and display: Advertising boards, display panels

Construction and decoration: Building formwork, partition panels, decorative boards

Road noise barriers: Sound insulation panels

Public facilities: Bus stations, parking structures, pergolas, vegetable greenhouses, swimming pools, shower enclosures

Electronics: Anti-static and conductive hollow sheet turnover boxes

These applications align with the buyer search terms that drive traffic to PP hollow corrugated sheet machine product pages, including “turnover box making machine,” “fruit box production line,” and “anti-static hollow sheet machine.”

FAQ

Q1: What materials can your PP hollow corrugated sheet machine process?

A: Our production line processes PP, PE, PC, and phosphogypsum-based compounds. It is compatible with virgin PP, recycled PP (up to 30%), and calcium carbonate filler masterbatch (up to 70%).

Q2: What sheet width and thickness range does the machine support?

A: Standard configurations cover widths from 1220mm to 3000mm and thicknesses from 2mm to 12mm. Custom dimensions are available upon request.

Q3: Can the line run with recycled material and filler to reduce cost?

A: Yes. The production line supports up to 30% recycled PP and up to 70% CaCO₃ filler masterbatch. The stable plasticization system ensures mechanical properties and surface quality remain suitable for the intended application.

Q4: What is the annual production capacity of Qingdao Tongsanhegu?

A: Our annual production capacity exceeds 100 PP hollow corrugated sheet machine lines. We have exported to more than 20 countries and hold ISO 9001 and CE certifications.

Q5: Do you provide downstream equipment for box-making?

A: Yes. We supply auxiliary machines including edge sealing machines, die-cutting machines, printing machines, welding machines, and box-folding machines, enabling a complete turn-key solution from sheet production to finished turnover boxes and packing boxes