CNC Plastic Processing

author: Universe plastic

2023-11-22

What is CNC plastic processing

CNC plastic processing uses computer-controlled CNC machine tools to cut or engrave plastic materials according to preset control programs, thereby realizing the processing and manufacturing of plastic parts.

CNC plastic processing is an efficient, precise, and economical manufacturing method that is widely used in various industries, such as aerospace, automobile manufacturing, medical equipment, etc.

In actual operation, CNC plastic processing usually starts from a piece of material, and after multiple removals of material, the set shape is finally obtained.

Plastic parts processed by CNC have the advantages of large size, high strength, good toughness, and low cost, and are the mainstream method of prototype production. However, some plastic parts with complex structures may be difficult or costly to produce.

Cnc Plastic Processing Materials

When selecting materials for CNC processing of plastics, factors that need to be considered include: plastic material characteristics, required functions of the product, product shape and size, and production efficiency.

Commonly used materials	density（ρ）	Thermal deformation	Advantages	Application
ABS	1.05~1.18g/cm³	93~118℃	Impact resistance, low temperature resistance, insulation, capable of complex processing	Plastic parts of home appliances and automobiles, switch buttons...
PMMA	1.15~1.19g/cm³	80℃	Colorless and transparent, high gloss and hard	Lampshades, display stands, decorations...
PC	1.18~1.22 g/cm3	135°C	Translucent, heat-resistant, insulating	Industrial machinery parts, CDs, office equipment, medical equipment and other plastic accessories...
POM	1.41~1.43g/cm3	105°C	Large rigidity, high hardness, fatigue resistance, insulation	Plastic gears, sliding shafts, industrial plastic accessories...
PP	0.9~1.5g/cm3	165°C	High strength, non-toxic, odorless, light weight, easy to process, heat resistant	Toy product shells, food packaging...
PS	1.05g/cm3	170~200℃	Insulating, colorless and transparent, good stability	Transparent packaging, electronic product casing...

If you need to make a large, complex plastic part, CNC machining may be a good choice.

If you need to make a small, simple plastic part, injection molding may be a better choice.

These materials have their own characteristics and common applications. Which one to choose needs to be decided based on the specific processing needs and application scenarios.

The engineers of Universe Plastic Company will give you the best material selection plan based on various factors of the product you want to customize.

CNC Plastic Processing Experience

Minimize Clamping Force

On CNC machines, many engineers may over-clamp the plastic material to prevent any movement during the CNC machining of the plastic. But over-clamping can create indentations in the plastic, or it can stress the material, causing it to expand and deform in different directions. Therefore, it is important to use the correct clamping force.

Use The Correct Cutting Tools

Blunt tools, improperly angled cutting edges, and even chip flute design can affect cutting results. Using the right cutting tool can mean the difference between a fast, efficient cut with a high-quality surface finish and a slow cut that leaves scratches and gouges on plastic surfaces.

Controlling The Temperature Of Plastic Materials

Excessive heat accumulation can cause many quality issues in plastic materials, resulting in plastic materials being scrapped. Therefore, maintaining the temperature of plastic materials is crucial. Sometimes it's better to cut quickly and then move away from the cutting position rather than linger and let heat build up.

Learn About Processed Plastic Materials

The properties of each plastic material vary greatly. Cutting parameters and tools suitable for one plastic may result in less surface roughness and dimensional consistency for another plastic. Sometimes machinists need to increase speed to counteract tool chatter in plastic machining, and sometimes slowing down will produce better results.

The advantages of CNC processing of plastics are its high precision, fast speed, and the ability to realize automated production. It is especially suitable for processing parts with complex shapes and precise dimensions. However, for some plastic parts with complex structures, there may be production restrictions or high production costs.

Therefore, when choosing between CNC plastic processing and injection molding, you need to weigh it based on specific needs and conditions. For example, if high-volume production is required, injection molding may be more advantageous. If you need to produce high-precision, complex-shaped plastic parts, CNC plastic processing may be more suitable.

Universe Plastic Company has more than 15 years of CNC plastic processing experience. In custom injection molding projects, free CNC prototype processing services are provided, including CNC plastic processing.

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