Polishing special-shaped stone requires careful finishing, including elements like pillars, capitals, carvings, edges, steps, countertops, arches, window sills, door frames, stone benches, tables, and sinks. Today, many stone processing plants use mechanical tools to streamline the process.

Mechanical polishing offers several advantages and disadvantages:

Advantages of Mechanical Polishing:

  1. It ensures consistent grinding results, allowing for flexible line arrangements with good interchangeability.
  2. The polished lines are smooth, flat, and have excellent straightness.
  3. It is ideal for curved or rotary-shaped products, delivering high gloss and efficiency.
  4. It significantly reduces physical labor and improves working conditions.
  5. It supports continuous production in pipeline operations.

Disadvantages of Mechanical Polishing:

  1. Initial investment is high, requiring specialized equipment, space, and custom grinding wheels.
  2. Lacks flexibility, making it more suitable for large-volume production.
  3. Each line type requires specific tools and a series of grinding wheels for roughing, fine grinding, and polishing.
  4. Long and thin lines may break easily during polishing.
  5. High-precision forming wheels must be manufactured by professionals.
  6. Polished lines may show visible grinding marks, affecting the overall appearance.
  7. Not suitable for fragile or easily broken stones.

Key Steps and Considerations for Polishing Stone Lines:

  1. Verify that the product shape matches the production design before proceeding to polishing.
  2. Treat the material with glue before grinding to ensure better adhesion and surface quality.
  3. Begin with rough grinding, leaving 0.5mm for finer grinding and water grinding. Follow the installation diagram and match the color and pattern for a uniform look.
  4. After water grinding with 500# grit, align the lines according to the drawing and polish them to avoid uneven joints.
  5. If there is misalignment at the joint, extend the transition area as much as possible and check straightness with a ruler during grinding.
  6. Conduct a final quality inspection after completing the polishing process.
  7. For intricate handicrafts, focus on improving brightness and reducing wave breaks.
  8. Select appropriate polishing materials based on the project needs.
  9. Inspect each abrasive or grinding disc carefully, ensuring that the previous marks are fully removed.
  10. Control water flow during polishing—too little can cause burning, while too much may affect the finish.
  11. Grind along the direction of the line as long as possible to prevent ripples.
  12. Use a faster polishing speed for better results.
  13. Opt for high-speed electric tools to enhance efficiency.
  14. Use larger lines when possible, which reduces the need for heavy rough grinding and ensures better consistency and quality.

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Changzhou Yingda New Material Co., Ltd , https://www.yingdaspc.com

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