Plastic Product CNC Machining

The precision of plastic CNC machining depends primarily on material properties, part structure, and machining equipment. Generally, we can achieve dimensional accuracy of ±0.01mm and surface roughness down to Ra0.8μm. For some special materials and complex structures, precision may vary. We select appropriate machining processes and equipment based on specific part requirements to ensure customer precision needs are met.

Selecting plastic material requires considering multiple factors: usage environment temperature, chemical exposure, mechanical performance requirements, electrical performance requirements, cost budget, etc. For example, PEEK or PI are suitable for high-temperature environments; PTFE offers excellent chemical corrosion resistance; PC or PA provide high strength; ABS or POM are commonly used for electrical insulation. Our engineers will recommend the most suitable material solution based on your specific application scenario.

Plastic materials have thermal expansion/contraction characteristics. Improper temperature control during machining may cause deformation. We control deformation through the following measures: 1) Stress relief treatment of materials before machining; 2) Using appropriate cutting parameters to reduce machining heat; 3) Employing cooling systems to control temperature; 4) Adopting step-by-step machining strategies for large or complex parts; 5) Performing aging treatment after machining. These measures effectively control deformation and ensure dimensional stability of plastic parts.

The choice between CNC machining and mold making depends mainly on batch size and cost: For small-batch production of 1-100 pieces, CNC machining is usually more economical as it avoids mold costs, has shorter production cycles, and facilitates design modifications; For large-scale production over 1000 pieces, injection molding may be more cost-effective. For medium batches of 100-1000 pieces, cost-benefit analysis is recommended. We provide the most economical solution based on your specific requirements and batch size.

Various surface treatments can be applied to plastic to improve performance and appearance: 1) Mechanical treatments: Grinding, polishing, sandblasting, etc.; 2) Chemical treatments: Surface activation, texture etching, etc.; 3) Coating treatments: Spray painting, powder coating, vacuum plating, etc.; 4) Printing treatments: Screen printing, pad printing, hot stamping; 5) Bonding treatments: Surface preparation to enhance adhesion strength. Different surface treatments impart different properties to plastic parts, such as increased wear resistance, corrosion resistance, aesthetics, or functionality.

The lead time for plastic CNC machining depends on part complexity, precision requirements, and batch size: Simple part samples are typically completed in 1-3 days; Medium complexity samples in 3-5 days; Complex high-precision samples in 5-7 days. Small-batch production (10-50 pieces) is usually completed within 5-10 days after sample confirmation; Medium batches (50-200 pieces) in 10-15 days. We arrange production schedules based on order status and strive to meet customer delivery requirements. Expedited service is available for urgent orders.