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Polishing acrylic

Polishing acrylic is done because machining (sawing, milling, turning) leaves matte surfaces. Since acrylic is mainly used visual, there is usually a desire to polish the visible surfaces (making them clear).

Induflex is using different methods of polishing, depending on the parts geometry:
  • Diamond edge polishing.
    Suitable for all sheet edges.
  • Flame polishing.
    Used on small inaccessible surfaces.
  • Manual polishing.
    Larger easily accessible surfaces.
  • Laser cutting.
    Pars cut from acrylic sheets.
Poleret akryl
CNC machined and polished acrylic
   
Diamond edge polishing

When using diamond edge polishing, edges on acrylic sheets are moved over sharp, fast-rotating diamonds. Properly done is the result so good that diamond polishing can be compared with cast surfaces. Moreover, the method is relatively inexpensive and can be performed on large batches.

Diamond edge polishing may be used on edges of shelves and signs that have previously been sawn to correct dimensions.

It should be noted that diamond edge polishing is exclusively for straight or sloping sides. Eg. it cannot be used on rounded corners.
Diamantkantpoleret akryl
Diamond edge polished acrylic with laser engraved text; the base is laser cut.
   
Flame polishing

Acrylic is flame polishing with a flame burning at a temperature between 2700-3300 degrees Celsius. Hereby melts the surface of the acrylic and becomes clear.

The method is especially useful for polishing of inaccessible positions on the acrylic part - curved and tilted surfaces, holes and inner corners. Prototypes and small batches is the most common. For larger batches other solutions are prefered.

Flame polishing is in practice reserved for extruded acrylic in a certain thickness, as cast acrylic has a tendency to appear burned.
Flammepolering
Polishing acrylic
   
Manual polishing

Acrylic parts can be manual polishing either by holding the part against a rotating polishing disk or hand-polished with a cloth bearing special polishing paste.

The method can polish larger surfaces or sloping sides. Possibly minor scratches can be removed. It is time consuming and used only for prototypes, small batches, expensive parts (eg. 3D) or repairs.

Ploering af akryl
30 mm acrylic. Machine and hand polished
   
Laser cutting

 

Laser cutting can cut acrylic parts from sheets up to 25 mm in thickness and the edges automatic becomes flame polished.
Laser cutting is ideal for both prototypes and large batches.

Much more about
laser cutting og acrylic

Facadeskilt i akryl
Signage in laser cut acrylic
   
Our polishers

Diamantkantpoler Pladetykkelse
[mm]
Edge Finisher EF-200 20


Our polishers

Flammepoler Type
Shannon Micro-Welder Super A
 
diamantkantpolering af akryl
Respectively diamond polished edge, laser-cut and sawn acrylic.
   
  Processing
Machining
  Laser cutting
  Bonding
  Bending
  Polishing
  Engraving
  Thermoforming
   
  Properties
  The use of Acrylic
  Production of sheets and profiles
  Cast versus extruded acrylic
  Chemical resistance
  Structural properties
  Dimensional stability
  Cleaning
  Fire
  Temperature
  Tension and notch
  Printing on acrylic
  Acrylic versus glass
  Acrylic versus polycarbonate
  Trade names for acrylic
  Environmental impacts of acrylics

   
  Q&A
  how do I get acrylic items cheaply?
  What is tolerance?
  Where can acrylic be bought?
  Production of acrylic parts in China?
  Can individuals buy acrylic from Induflex?
  How big is the heat expansion of acrylic?
 
     
 
 

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