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How to Clean the Screw of a Extruder ?

How to Clean the Screw of a Puffing Machine

Proper cleaning of the screw in a puffing machine is essential for maintaining food safety, preventing contamination, and ensuring optimal performance. Here’s a step-by-step guide to effectively clean the screw:

1. Safety Precautions

  • Turn off and unplug the machine to avoid accidents.
  • Allow the screw to cool down if it was recently in use.
  • Wear gloves to protect your hands from sharp edges.

2. Disassemble the Screw

  • Remove the screw from the puffing machine according to the manufacturer’s instructions.
  • Use appropriate tools to avoid damaging the components.

3. Remove Excess Residue

  • Scrape off any large food deposits with a plastic or wooden scraper (avoid metal tools to prevent scratches).
  • Use a brush or compressed air to dislodge stuck particles.

4. Soak in Cleaning Solution

  • Prepare a food-safe degreaser or a mixture of warm water and mild detergent.
  • Soak the screw for 15–30 minutes to loosen stubborn residue.

5. Scrub and Rinse

  • Use a nylon brush to scrub all surfaces, including grooves and threads.
  • Rinse thoroughly with clean water to remove all detergent traces.

6. Sanitize (If Required)

  • For food-grade applications, sanitize with a diluted food-grade sanitizer (e.g., hydrogen peroxide or alcohol solution).
  • Rinse again with water if needed.

7. Dry and Reassemble

  • Allow the screw to air-dry completely or use a lint-free cloth.
  • Reinstall the screw carefully, ensuring proper alignment.

8. Regular Maintenance Tips

  • Clean the screw after each use to prevent buildup.
  • Inspect for wear and tear periodically.
  • Lubricate (if recommended) with food-grade lubricant.

By following these steps, you can maintain your puffing machine’s efficiency and extend its lifespan. Always refer to the manufacturer’s guidelines for specific cleaning recommendations.


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Our company's main research direction is puffing and extrusion engineering, which is widely used in puffing snack food projects, fried snack food projects, and pet food projects.

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