The prototypes can represent the designer's ideas physically, whichcanbe used toinspectthe appearance and structure. One or a few prototypes can be made according to the product dimension drawing or structural drawings before mold making. 

The advantages of CNC Machining of acrylic (PMMA)prototype: 

The automatic processing of complex parts is far beyond the capability of general machine tools. On account of its high adaptability, high precision, high efficiencyandsuitabilityto the characteristics of the modernized production management,CNC machining can accurately reflect the informationin drawings,save money, improvesurface quality and raisethe production efficiency. 

Various materials can be used in making prototypes.Photosensitive resins are mainly adopted for SLAmolding. The silicone moldis mainly used in mold replication of vacuum injection mold. The materials used in CNC machiningare divided into two categories:metal and non-metal materials. Non-metal materials mainly refer to some engineering materials, such asABS, PC, PP, POM, PA, PMMA (acrylic), bakelite and epoxy tooling board. 

The materials for CNC machining are usually sheet materials with standard thickness. Sheet materialswith thickness more than 100 mm  aredifficult to order, and theones withthickness of 150 mmneed to be customized. As the prices of the sheet materials with special thickness are different, the prices of sheet materials used in making prototype are not consistent. 

Acrylic (PMMA)sheets are polymerizedwithMethyl methacrylate (MMA), namely polymethyl methacrylate (PMMA)plexiglass. Acrylic (PMMA) is characterized with high transparency (light transmittance92%), excellent weather ability, of desirable surface hardness and gloss, plasticity. It is usually suitable for fabricating prototype of auto lights and eyeglasses of high light transmittance. 

If you are interested in PMMA CNC Machining or you have any parts need to be made by CNC Machining, feel free to contact us at enquiry@nice-rapidtooling.com!