- Finishing options for coin blanks, tokens, medals, and badges.
- Processes selected for the actual alloy, plating, and surface condition.
- Controlled cleaning, smoothing, or burnishing with suitable media.
- Trials to check surface appearance, weight, edges, and drying.
Coin Blank Polishing and Burnishing Machines
Inovatec supplies equipment and media for finishing suitable coin blanks, tokens, medals, and badges. Define the alloy, surface condition, required texture or gloss, and permitted material removal. Plated or struck pieces need their own process review; antique and collectible coins require a separate preservation assessment before machine treatment.
A centrifugal disc finisher provides a batch option for compatible blanks and tokens. Check chamber gap, media, loading, contact marks, and material removal, especially for precious-metal or already struck pieces.
An automatic centrifugal disc system can combine configured finishing and handling stages for production batches. Specify loading, separation, transfer, and accepted output using the actual blank family.
A vibratory bowl can clean, smooth, or burnish compatible blanks with selected media and compound. Evaluate circulation, stacking, edge change, part contact, and separation in a representative batch.
A vibratory dryer can remove remaining surface moisture from suitable cleaned blanks. Confirm the approved drying medium or other supplied arrangement, temperature, loading, residue control, and dryness target.
Coin Alloys and Surface Requirements
For silver blanks, confirm alloy, plating, tarnish condition, and permitted removal. Evaluate the finish and weight change before adopting a batch process.
For bronze blanks, identify the copper-alloy grade and oxidation condition. Define whether cleaning, smoothing, or burnishing is required, and protect any relief or intentional patina.
For nickel or nickel-alloy blanks, specify the actual composition, coating, edge profile, and required surface. Check contact marks and media separation through trials.
For aluminum blanks, select the process around the alloy, hardness, surface condition, and permitted edge change. Assess steel-media contact and marking before choosing burnishing.
For brass blanks, agree the alloy, starting surface, and required appearance. Compare compatible cleaning and burnishing stages with the chosen media and compound.
For gold blanks, define alloy, weight tolerance, relief, and finish. Establish loading, contact control, media, and inspection around the permitted material removal.
Vibratory Tumbling Media
Steel burnishing media and corn cob drying media serve different stages. Choose steel grade, shape, and size around the blank geometry, compound, and required surface. Select a compatible drying grade and inspect moisture, contamination, residues, and wear before reuse.
- Send alloy details, drawings or samples, dimensions, and the incoming surface condition.
- Identify plating, relief, edges, weight tolerance, and any surfaces that must remain untouched.
- Specify cleaning, texture or gloss targets, accepted output, and drying requirements.
- Agree sample inspection, material-removal limits, handling, and equipment configuration.
- Factory
- Before & After
The minimum order is one machine. Confirm the configuration, accessories, packing, and delivery requirements in the quotation.
Machines are packed in wooden cases. Request packing dimensions, gross weight, lifting information, and any destination-specific packing treatment or documentation.
The listed terms are a 30% advance payment and the 70% balance before shipment. Discuss workshop inspection, the payment method, and the agreed acceptance arrangements in your quotation.
The listed production estimate is 20–25 days. Confirm the model, quantity, configuration, and required delivery date before placing the order.
Shipping can be discussed through Shanghai or Ningbo, with Yiwu consolidation where applicable. Confirm the delivery address, freight, transport method, and responsibilities in the quotation.
Coin Blank Polishing and Burnishing: Process and Equipment Selection
Inovatec supplies equipment and media for finishing suitable coin blanks, tokens, medals, and badges. Define the alloy, surface condition, required texture or gloss, and permitted material removal. Plated or struck pieces need their own process review; antique and collectible coins require a separate preservation assessment before machine treatment.
In This Guide
- Define the Blank or Coin Being Processed
- Choose the Finishing Task
- Assess Batch Processing and Output
- Compare Equipment and Handling
- Select Steel Burnishing and Drying Media
- Confirm Media Grade, Shape, and Condition
- Evaluate the Actual Coin Alloy
Define the Blank or Coin Being Processed
State whether the workpiece is an unstruck blank, plated blank, token, medal, badge, or finished struck piece. Record alloy, dimensions, coating, starting surface, relief, and weight limits. For antique or collectible pieces, obtain a preservation assessment before treatment; a production finishing cycle can alter their original surface and detail.
Choose the Finishing Task
Separate cleaning of surface contamination, oxide removal, smoothing, edge treatment, and burnishing. Set appearance and measurable acceptance criteria for each stage. Check compatibility with subsequent plating or striking, including residues and drying. A mirror appearance depends on the starting surface and the accepted process.
Assess Batch Processing and Output
Compare accepted pieces per load and complete cycles per shift, including handling, separation, washing, drying, and inspection. Trials should check stacking, contact marks, weight change, edges, and consistency across the batch. Use these results to assess operating cost and automation needs.
Compare Equipment and Handling
A vibratory bowl, centrifugal disc finisher, or configured automatic disc line offers different loading and handling options. Review chamber gap, working load, controls, separation, transfers, and cleaning. The original automatic arrangement includes a double-batch concept and gap control; confirm these features for the quoted system. Include a compatible drying stage where needed.
Select Steel Burnishing and Drying Media
Match burnishing media to alloy, surface target, geometry, and contact limits. Corn cob is a drying medium for appropriate cleaned parts; assess its grade, temperature, cleanliness, and residue removal. Verify a complete finishing and drying sequence rather than treating all media as interchangeable abrasives.
Confirm Media Grade, Shape, and Condition
The original media list includes AISI 201, 304, 316, 420, and 440C grades, together with carbon steel. Carbon steel is a separate material choice. Confirm the supplied grade and select balls, ball cones, pins, diagonals, or oval shapes around contact, detail, and separation. Inspect drying media for moisture and contamination, and agree replacement criteria.
Evaluate the Actual Coin Alloy
The listed application range includes silver, bronze, nickel, aluminum, brass, gold, copper, cupronickel, ferritic stainless steel, manganese brass, and multi-metal constructions. Identify the actual grades and coatings rather than choosing a recipe from the coin color. For bimetallic and trimetallic pieces, inspect both interfaces and each material for changes in appearance, dimensions, and chemistry compatibility.
Equipment, Media, and Component Examples
Related Equipment and Media Resources
See Centrifugal disc finishing machine, Corn cob tumbling media, Single disc automatic centrifugal disc finishing machine, Steel tumbling media, Tumbling media, Vibratory dryer, Vibratory finishing machine.