Tips For Plastic Part In CNC Machining Manufacturing

DALIAN, China - March 17, 2021 - PRLog -- The application of CNC machining is more and more widespread, and plastics are becoming more and more popular. They are light weight, easy to process, and generally cheaper than metal counterparts. At the same time, in the machinery manufacturing industry, in order to meet the requirements of flame retardancy, insulation and abrasion resistance, plastics are often used. So today we will talk about some tips for machined plastic parts, from part design to part processing and how to obtain a perfect finish on CNC processed plastic parts.

Tips In Plastic Part Design

Designing manufacturable plastic parts involves many important factors, which involve all areas of part design, tooling, material selection and production. First, the design intent or end use must be kept in mind, and parts must be built around functional requirements. Consider reducing weight, eliminating manufacturing and assembly steps, improving structural components, reducing costs and bringing products to market faster. In order to successfully achieve the design goals of plastic parts in the production process, the following important factors need to be considered.

1.Material Considerations

Manufacturers usually choose familiar plastic grades from similar applications, or rely on supplier recommendations. The resin selected in this way may be sufficient, but it is rarely the best. Plastic selection is a complex task, involving many considerations, such as: temperature, chemical resistance, heat resistance, flammability, and electrical and mechanical properties such as government and private standards, plastics and all assembly steps cooperation and other factors .

2. Radius

The radius should always take into account the thickness of the part-eliminating the possibility of high stress areas and possible fracture of the part. The general rule of thumb is that the thickness at the corners should be within the range of 0.9 times the nominal thickness of the part to 1.2 of the nominal thickness.

3. Wall Thickness

Designing parts to have the same wall thickness can help avoid many part defects that occur during the manufacturing process. When the plastic melts, it will flow to the area of resistance. If the thickness of your part is consistently inconsistent, the melt may flow into the thicker area first. When this happens, the thin area may not be filled properly. In addition, thicker areas tend to cool more slowly, and there is a risk of voids or sag defects. Designing parts with rounded corners will also help fill the parts correctly during the molding process.

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