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Features and Functions of a Vacuum Calibration Water Tank


A vacuum calibration water tank is a specialized piece of equipment used in the manufacturing process of plastic pipes, particularly in extrusion lines. Here are the key features and functions of a vacuum calibration water tank:

1. Purpose: The primary function of a vacuum calibration water tank is to cool and set the shape of extruded plastic pipes immediately after they exit the extruder die. This process is crucial for achieving dimensional accuracy and ensuring the pipes meet required specifications.

2. Cooling Method: The tank is filled with water, and the extruded pipe passes through it. Water jets or sprays inside the tank provide uniform cooling around the pipe circumference. Cooling the pipe rapidly helps in maintaining its shape and preventing deformities.

3. Vacuum System: Vacuum calibration tanks are equipped with a vacuum system that creates a controlled vacuum environment around the extruded pipe. This vacuum ensures uniform cooling and prevents sagging or deformation of the pipe during the cooling process.

4. Adjustable Sizing: The tank typically has adjustable sizing sleeves or guides that allow for precise calibration of the pipe diameter. These sleeves can be adjusted to match the desired pipe dimensions and tolerances.

5. Water Temperature Control: Temperature control of the water is essential to achieve consistent cooling and proper pipe formation. Some tanks have heating or cooling systems to maintain the water temperature within a specific range.

6. Material Compatibility: Vacuum calibration water tanks are designed to handle various types of plastic materials used in pipe extrusion, including PVC (polyvinyl chloride), PE (polyethylene), PP (polypropylene), and others.

7. Length and Configuration: The length and configuration of the tank depend on the diameter and length of the pipes being produced. Larger tanks are used for larger diameter pipes or higher production speeds.

8. Integration with Extrusion Line: Vacuum calibration water tanks are typically integrated into the extrusion line immediately after the extruder and before the haul-off unit. They are synchronized with the extrusion speed to ensure consistent pipe quality.

9. Quality Control: Proper calibration in the vacuum tank is critical for meeting industry standards and ensuring the pipes have uniform dimensions, smooth surfaces, and straight lengths.

Vacuum calibration water tanks are essential components in the production of plastic pipes, providing precise cooling and shaping to ensure high-quality end products suitable for various applications such as plumbing, irrigation, and industrial piping.

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