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Jinhang Machinery is a high-quality industrial roller manufacturer from China, specializing in the research, development, processing, and customization of various industrial rollers. It can perform in-depth design and precision manufacturing based on customer drawings, operating conditions, and equipment parameters.

Common defects include: • Softening of the product surface, making it difficult to stabilize its shape • Inaccurate dimensional control, with fluctuations in thickness or width • Surface stretching marks or slight deformation

From a thermal perspective, the greater the temperature difference, the more uneven the heat exchange on the cooling roller, and the worse the cooling quality. Therefore, most precision processes require the cooling roller temperature difference to be as small as possible, usually controlled within a very strict range.

Cast film rollers are the core rollers that directly participate in material forming and determine product quality, while cooling rollers are mainly used to reduce material temperature and assist in stabilizing the process.

Film, sheet, and plate materials are typically in a soft or semi-molten state after processes such as heating, extrusion, coating, and calendering. Without the precise control of cooling rate by cooling rollers, the following cannot be achieved: • A smooth surface • Stable thickness • Uniform molecular structure • Stable mechanical properties

Thin-walled cooling rollers typically have internal channels for cooling water or other cooling media. An unreasonable channel design is one of the most common causes of uneven cooling.

Plastic films (such as PE, PP, PET, PA, PVC) are most sensitive to cooling roller temperature. • PE/PP film cooling roller temperature: 20–40℃ • PET film cooling roller temperature: 10–25℃ • PA (Nylon) film cooling roller temperature: 15–30℃ • PVC film cooling roller temperature: 30–45℃

The fastest cooling speed generally refers to: Cooling rollers with a bidirectional spiral flow channel + thin-walled structure + high thermal conductivity material + mirror finish + low-temperature chilled water medium.

Cooling roller helps packaging materials maintain their mechanical properties and appearance characteristics by rapid and uniform cooling. For example, plastic film can avoid warping or shrinkage caused by thermal stress under the action of cooling roller, thereby ensuring the thickness uniformity and flatness of the film.

An industrial heating roller is an industrial equipment that heats the roller surface through an internal heating system. An industrial cooling roller takes away the heat from the roller surface through an internal cooling system, so that the contacted material cools quickly.