| PVC pipe vacuum calibration tank | ||||
| Model | Pipe Diameter(mm) | Vacuum Pump(kw) | Water Pump(kw) | Lenth(mm) |
| GF 32*4 | 16-32 | 4.0*1 | 1.5*1 | 4500 |
| GF 63*2 | 16-63 | 4.0*2 | 4.0*2 | 5000 |
| GF 160 | 50-160 | 5.5*1 | 4.0*2 | 6000 |
| GF 250 | 63-250 | 5.5*1 | 5.5*2 | 6000 |
| GF 400 | 160-450 | 5.5*2 | 5.5*2 | 6000 |
| GF 630 | 315*630 | 7.5*2 | 7.5*2 | 9000 |
HDPE pipe vacuum calibration tank | ||||
| Model | Pipe Diameter(mm) | Vacuum Pump(kw) | Water Pump(mm) | Length(mm) |
| PE63 | 16-32 | 2.2 | 3.3 | 6000 |
| PE125 | 32-125 | 4 | 5.5 | 6000 |
| PE250 | 63-250 | 4 | 5.5 | 6000 |
| PE450 | 110-450 | 4*2 | 5.5*2 | 6000 |
| PE500 | 160-500 | 4*2 | 5.5*2 | 6000 |
| PE630 | 250-630 | 4*2 | 5.5*2 | 6000 |
| PE800 | 315-800 | 5.5*3 | 7.5*3 | 3000+6000 |
| PE1200 | 630-1200 | 4*6 | 7.5*6 | 3000+6000 |
The Vacuum Plastic Pipe Calibration Tank is engineered for precision shaping and cooling of extruded plastic pipes, ensuring dimensional stability and high production efficiency across varying manufacturing demands.
Equipped with a high-performance oil-sealed rotary vane vacuum pump, the system offers an adjustable pressure range from -0.06 to -0.09MPa. This vacuum pressure is meticulously controlled via a proportional valve to guarantee consistent adsorption force along the entire length of the calibration sleeve. Such stability prevents pipe deformation, such as ovality, caused by uneven pressure distribution. Additionally, an integrated vacuum buffer tank significantly reduces pressure fluctuations, further enhancing the shaping stability during continuous extrusion.
The multi-section water tank, designed with 2 to 4 sections and a total length spanning 10-30m, utilizes a highly effective counter-flow cooling mechanism. Cooling water flows in the opposite direction of the extruded pipe, maximizing heat exchange efficiency. The cooling water flow rate is fully adjustable between 20-50m³/h. Regulated by an industrial chiller, the water temperature is strictly maintained at 15-25℃. This precise thermal management ensures uniform cooling across the pipe structure, keeping the temperature difference between the inner and outer walls at ≤5℃.
The core shaping component is a high-precision steel sleeve constructed from chrome-plated 45# steel. It features an exceptional surface roughness of Ra 0.8μm, which directly translates to a smooth outer pipe surface (Ra ≤1.6μm). With an inner diameter tolerance tightly controlled at ±0.2mm, this sleeve dictates the ultimate outer diameter accuracy of the finished product. Standard calibration sleeves cover pipe diameters ranging from 20mm to 630mm, catering to common manufacturing requirements, while custom sizes can be engineered for specialized projects.
To facilitate smooth material transfer, the tank is equipped with upper and lower rows of rubber-coated conveying rollers featuring adjustable pressure. This design ensures stable pipe conveyance without inflicting scratches on the newly formed surface. Driven by a frequency conversion system, the roller speed synchronizes perfectly with the main extrusion line to prevent unwanted stretching or compression that could compromise dimensional accuracy. The spacing between rollers is easily adjustable to accommodate various pipe diameters (20-630mm), and quick-change roller sets are available for significant diameter transitions.
This calibration tank is extensively used for shaping and cooling PVC drainage pipes, water supply networks, and electrical casing conduits. The robust vacuum adsorption guarantees excellent pipe roundness (ovality ≤2%) and precise outer diameter accuracy (tolerance ≤±0.3mm), strictly meeting GB/T 5836.1 industry standards. Its rapid cooling capability efficiently reduces pipe temperatures from 180℃ to 40℃ within just 15 meters, significantly boosting production output and enabling extrusion speeds of up to 15m/min for small-diameter pipes (≤63mm).
The equipment is critical for securing the roundness and dimensional integrity of PE water supply pipes and PPR hot water systems. Uniform cooling effectively minimizes internal stress within the pipe structure, thereby reducing the risk of warping during installation. This controlled thermal process also enhances the pressure resistance of the final product; for instance, properly cooled PPR pipes can reliably withstand a 2.0MPa working pressure. Furthermore, the smooth surface finish achieved by the calibration sleeve reduces internal fluid resistance in plumbing applications.
Beyond standard solid-wall pipes, the tank is highly suitable for processing corrugated profiles, such as PVC double-wall corrugated pipes, and other structured-wall designs. When handling corrugated pipes, a specialized vacuum calibration sleeve featuring a matching corrugated inner surface is employed to form the complex structure. Simultaneously, the extended cooling system ensures the newly formed corrugations maintain their exact shape without flattening. The tank's substantial length (≥25m) perfectly accommodates the generally slower extrusion speeds associated with manufacturing these specialized pipes.
Proper thermal management is essential for optimal pipe extrusion. The cooling water temperature is continuously controlled between 15-25℃ via a dedicated chiller unit, striking an ideal balance between rapid cooling efficiency and overall energy consumption. For high-speed extrusion lines operating at ≥12m/min, the water temperature can be safely lowered to 12℃ to guarantee sufficient heat removal. Conversely, when processing thick-walled pipes (wall thickness ≥20mm), the water temperature should be set higher, typically between 20-25℃. This prevents overly rapid surface cooling, which could otherwise induce internal thermal cracks and compromise structural integrity.
The calibration tank is designed for versatile production and can be efficiently adjusted to accommodate a wide range of pipe diameters from 20mm to 630mm. The changeover process involves replacing the calibration sleeve with the appropriate inner diameter, adjusting the spacing and pressure of the conveying rollers, and modifying both the vacuum pressure and cooling water flow to match the specific heat capacity of the new pipe size. For minor diameter changes within a 50mm range (e.g., shifting from 50mm to 100mm), operators can complete the adjustment within 30 minutes. For more substantial changes (e.g., from 100mm up to 315mm), the comprehensive setup, including sleeve replacement, typically requires 1-2 hours.
| Name | Size | Downloads | Update | Thumbnail | Copy Link | Download |
|---|---|---|---|---|---|---|
| PLASTIC RECYCLING 2024-IVIMA.pdf | 10.74MB | 713 | 2024-12-30 |  | Copy Link | Download |
| PLASTIC EXTRUSION 2024- IVIMA.pdf | 12.30MB | 659 | 2024-12-30 |  | Copy Link | Download |
