For the uninitiated, Perspex or acrylic is nothing other than a plastic material. Industry experts often refer to it as a polymer resin or Polymethyl Methacrylate (PMMA). This thermo-softening plastic is usually (but not always) clear. As such, it makes a convenient alternative to glass in a myriad of applications. Not surprisingly, it often replaces the glass used in boat windows, fish tanks, display cabinets etc. More importantly, it is a material this is considerably easy to work with. So, plastic fabricators in Sydney and other places can easily heat this material and make it change shape. As a result, once the material cools down, it will continue to retain the new shape given to it.
It is worth mentioning that acrylic usually comes in two varieties for engineering and fabrication purposes i.e. cast and extruded. The production of cast acrylic sheets usually takes place in small batches. These sheets come in a wide range of shades, varieties and thicknesses. Their superior transparency and light transmission rates makes these sheets ideal for designing and fabricating complex shapes, displays and designs. In contrast, the production of extruded Perspex sheets typically takes place in long sheets through processes that are not as exacting and more economical than is the case for cast acrylic sheets. In projects necessitating the use of acrylic in less visual applications, extruded acrylic makes for a better choice. Not surprisingly, the use of extruded acrylic sheets is significantly popular in engineering applications. Acrylic comes in a diverse range of colours, thicknesses and opacities. As a result, it remains a popular material for making display stands of all types as well as signage.
The production of cast Perspex sheets takes place directly from the monomer. Workers place the cast between two sheets of high-quality glass. Then, they polymerise it in batches in specially developed ovens and water baths in a carefully controlled manufacturing process. In contrast, workers produce extruded Perspex sheets from acrylic polymers in the form of granules. Thereafter, the workers extrude these into sheet form. Depending on the intended use, workers will either opt for using cast or extruded Perspex sheets. Both varieties of Perspex sheets offer specific merits, which invariably govern their use in industrial and commercial facilities.
Cutting Perspex sheets necessitates the use of sharp cutting tools. Only then will workers be able produce a good finish. Some people might feel that the tools typically used for working with wood and soft metals will not be appropriate for working with Perspex sheets. However, this is not the case. You could use almost all the hand tools used for working with wood and soft metals on acrylic sheets. But, you should avoid using some tools such as laminate cutters, guillotines and blanking dies when you work with acrylic. Plastic fabricators often use CNC saw cutting machines for cutting Perspex. For smaller jobs, you could use fine-toothed hand saws such as fret saws and hack saws too. By securely fixing the acrylic sheets and applying only light pressure, you will be able to achieve the desired results. Bigger jobs necessitate the use of powered saws with blades having alternate teeth bevelled such as jig saws and band saws.