Achieving optical clarity is critical when you are dealing with a device that relies on transparency for the purposes of visual analysis and inspection. Glass used to be preferred because it can transmit light. However, acrylic polymer, which was created more than 80 years ago, now has a huge share of the current market. Flame polishing is necessary for producing a glass-like finish for various applications when using acrylic.
Acrylic
When done correctly,flame polishing acrylic produces an extremely clear finish. Using acrylic in the polishing process is advantageous because acrylic features not only unparalleled optical qualities but also biocompatibility and chemical resistance. Other benefits of this material include lower costs, impact strength and disposability, which make it a leading material to use in component and part manufacturing in several industries. Acrylic additionally lacks color and can transmit light well.
Polishing Process
The process of flame polishing acrylic involves the use of a hot flame for flowing a surface. This method requires strong operator skill because acrylic is stress sensitive and thus slightly brittle, so the surface of the material may easily craze or crack. The high-speed polishing technique may be used on a piece of cut acrylic of any size or shape. Flat outside surfaces are most applicable for this polishing method.
A flame polishing expert will start with an expertly machined part and a flame polisher, usually a hydrogen-oxygen welding torch. The expert will flow a high-temperature, fine, hydrogen-based flame over acrylic to slightly melt it; this heat must be applied at a proper distance from the acrylic’s surface. Ideally, the flame will be bluish, about 3 inches long, narrow and nearly invisible. The heat source has to be moved quickly with no disruption. In the end, an annealing cycle is employed to relieve any stress caused by the finishing process so as to prevent cracking/crazing.
Considerations
Flame polishing offers the benefit of adding a clear finish to just about any acrylic element. The results are also rapid, with a glass-like finish being achieved in a brief period of time. This polishing method additionally has the potential to reach areas that other methods cannot, particularly when you’re dealing with edges that are hard to access or complex geometry. With the assistance of the right company, you can personally experience the advantages of flame polishing acrylic for your application.
