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ALUMINIUM LINISHING SERVICES SERVING THE UK
R D Castings Ltd offers expert linishing services across the UK. Contact us to discuss your requirements
LINISHING ALUMINIUM DIE CASTINGS: PROCESS OVERVIEW
Linishing is a surface finishing technique used to smooth, refine, and improve the appearance of die cast components. This process is essential in preparing castings for further finishing operations such as powder coating, anodizing, or painting, or to meet specific aesthetic or functional requirements.
1. PURPOSE OF LINISHING
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Surface Smoothing: Removes casting marks, rough edges, and imperfections.
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Improved Aesthetics: Produces a consistent, uniform finish.
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Functional Quality: Helps achieve dimensional accuracy and better surface contact for assembly.
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Coating Preparation: Creates an ideal base for painting or anodizing.
2. PROCESS STEPS
Step 1: Inspection and Preparation
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The aluminium die casting is first inspected for major defects or inconsistencies.
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Parts are cleaned to remove any oils, debris, or residues from the casting process.
Step 2: Coarse Linishing
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A belt grinder or linishing machine fitted with coarse abrasive belts (e.g., 60-80 grit) is used to remove heavy imperfections like flash, parting lines, and gate marks.
Step 3: Intermediate Linishing
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Finer abrasives (120-180 grit) are used to further smooth the surface and refine contours.
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This step may involve manual or semi-automatic machines, depending on part complexity.
Step 4: Final Finishing
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A final pass with very fine abrasive belts (240-400 grit) or polishing pads ensures a uniform, satin-like finish or prepares the surface for high-gloss finishing.
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Additional polishing may follow, if specified.
Finish Specifications: Vary depending on whether the part is visible in the final product or used functionally.
