Custom Plastic CNC Machining Parts in Various Materials
At SINCO-CNC, we specialize in customizing plastic CNC machining parts for our customers with various material properties and product structures, including:
How does SINCO-CNC's plastic CNC machining work?
Plastic CNC machining is a process that involves creating a 3D model and then using automated cutting to manufacture the part. First, a CAM program is created based on the 3D model. Then, the plastic sheet or rod is fixed to the machine bed, and the CNC equipment is calibrated to locate the center of the product. Finally, the program is executed, and the CNC machine automatically cuts the plastic material according to the precise instructions in the code. This results in the creation of precision plastic parts. SINCO-CNC has used this method to manufacture thousands of plastic parts, and we can accommodate orders of any size. If you need fast and accurate CNC machined parts, we invite you to try our services.
Material Selection in Plastic CNC Machining
In plastic product machining, you may encounter different material options. Below, we list the names, properties, and application ranges of commonly used materials for your reference and selection:
ABS – Acrylonitrile Butadiene Styrene Copolymer, is a polymer compound formed by the copolymerization of monomers such as acrylonitrile, butadiene, and styrene. The product has a density of 1.03 g/cm³ and a temperature resistance of -20/+80 degrees Celsius. ABS has excellent mechanical properties, impact resistance, heat resistance, chemical resistance, and weather resistance, as well as good electrical insulation and processing properties.
PP – Polypropylene is a polymer formed by the polymerization of propylene through addition reactions. The product has a density of 0.89-0.91 g/cm³ and temperature resistance of -20/+100 degrees Celsius. Modified PP can achieve higher temperature resistance, for example, increasing the content of glass fiber or thermal stabilizers can improve the high-temperature resistance of PP.
POM – Polyoxymethylene, also known as polyformaldehyde resin, is a polymer material mainly composed of formaldehyde monomers. The product has a density of 1.38~1.42 g/cm³ and excellent physical, mechanical, and thermal properties. It is widely used in the processing and manufacturing of gears, transmission shafts, switches, and sockets, among others.
PEEK – Polyether ether ketone is a high-performance thermoplastic engineering material with excellent mechanical properties, chemical stability, and high-temperature resistance. It has a density of 1.3-1.45 g/cm³ and is widely used in aerospace, medical devices, the automotive industry, electronics, and other fields.
Nylon – Polyamide is a general term for synthetic fibers and plastics. It has a density of 1.10-1.15 g/cm³. The temperature resistance of nylon is generally between -40℃ and 120℃, and the specific value also varies depending on the type of nylon and the production process. Nylon is widely used in gears, bearings, valves, pipes, and other products.
PTFE – Polytetrafluoroethylene is a high molecular compound composed of carbon and fluorine. It has a density of 2.1-2.3 g/cm³ and a temperature resistance of -70℃/+260℃. PTFE has strong inertness and chemical resistance and is not corroded or affected by most chemicals. It is mainly used for pipes, valves, sealing parts, cables, and other products.
PAI – Polyamide-imide is a high-performance engineering plastic with a density of 1.3-1.5 g/cm³ and temperature resistance of -40℃/+300℃. It has excellent mechanical properties, thermal stability, chemical corrosion resistance, and high-temperature resistance, and performs well in harsh environments such as high temperature, high pressure, and high speed. It is mainly used to manufacture guide wheels, screws, bearings, gears, and sealing parts.
HDPE – High-density polyethylene is a high molecular compound formed by the polymerization of ethylene. Its density is 0.941-0.965 g/cm³, and its temperature resistance is -50℃/+80℃. It has excellent mechanical strength, wear resistance, chemical resistance, and cold resistance, as well as good UV resistance and electrical insulation performance.
PVC – Polyvinyl chloride is a high molecular compound formed by the polymerization of vinyl chloride monomer. It has a density of 1.38-1.58 g/cm³ and a temperature resistance of 0℃/+60℃. PVC has excellent physical properties, chemical stability, and processing properties, as well as good insulation, corrosion resistance, and weather resistance.
Kynar – Polyvinylidene fluoride, PVDF, is a high molecular compound formed by the polymerization of vinylidene fluoride monomer. It has a density of 1.76 g/cm³ and a temperature resistance of -60℃/+150℃. Kynar material has excellent chemical resistance, high-temperature resistance, wear resistance, corrosion resistance, and flame retardancy, as well as good electrical performance and UV resistance.
UHMW – Ultra High Molecular Weight Polyethylene is a special type of polyethylene material. The molecular weight is usually between 3 million and 100 million, several times higher than that of general PE. UHMW has a low density, generally around 0.93-0.94 g/cm³, and a temperature resistance of -269℃/+80℃. It is mainly used to manufacture various parts and components, bearings, gears, and guide rails.
Advantages of SINCO-CNC's Plastic CNC Machining
We have extensive experience in the design and machining of CNC plastic parts, and we can develop the most suitable processing methods for each plastic material. With over 50 skilled technicians with more than 10 years of experience in the industry and advanced CNC machining equipment, we can manufacture any custom plastic parts you require.
No Need for Molds
Plastic CNC machining parts do not require separate mold manufacturing. Just provide us with 3D drawings, and we can machine the plastic parts you need.
You can choose the most suitable plastic material for your product properties to be CNC machined, such as wear resistance, corrosion resistance, chemical resistance, and high-temperature resistance. This ensures that your product is tested with the most comprehensive and realistic data, allowing for a better assessment of its feasibility.
Plastic parts manufactured through CNC machining only require DWG or STEP files, and we can immediately CNC machine them for rapid delivery.
CNC machined parts can be modified at any time if the structure is not a match, achieving cost savings and shortening the sample delivery cycle.
Plastic CNC Machining Services
Quickly process any plastic CNC parts
No restriction on any structure, fast printing
CNC machining and 3D printing are both options for you to choose
We can CNC machine any plastic material
Clamping Fixture Selection
When machining CNC plastic parts, attention must be paid to the selection of clamping fixtures.
I: There is a big difference in properties between plastic materials and metal materials. The material hardness of the fixture must be close to the plastic properties. We commonly use Phenolic Resin as the material for fixtures.
II: The clamping force of the fixture during machining cannot be too large. Plastic materials have internal stresses, and excessive clamping force will cause deformation of the parts during machining, affecting the product tolerances.
CNC Cutting Tooling
Matching different machining tools to different plastics is crucial.
Each type of plastic has its own characteristics. Some materials are more wear-resistant with the addition of glass fiber, while others are more heat-resistant with the addition of graphite. Some plastics are more stable in size with the addition of other elements. These modified materials have significant differences in thermal reaction and internal stress and have strict requirements for cutting tools and machining speeds during the machining process.
Difference between Plastic CNC Machining and 3D Printing
CNC machining has no limitation on materials and can process any plastic material according to your requirements. On the other hand, 3D printing material selection is limited to photosensitive thermosetting resin, with only 2-3 material options available.
CNC machining is suitable for products with special requirements on size and material properties, such as PEEK, PA, PAI, HDPE, which have material properties and high-precision machining requirements that cannot be achieved by 3D printing.
3D printing has no limitations on plastic structures and is suitable for products that require mold making, fast prototyping, assembly, detection of plastic parts defects, and optimization of product structures to improve the production process and reduce unnecessary development costs.
Both methods are solutions for rapid prototyping and the choice between the two depends on the product structure. There is no better or worse option, only the need to choose the appropriate processing method for your product to reduce costs and achieve fast delivery. If you have any questions, please feel free to contact us.
Expansion Industries for Plastic CNC Machining
The application of CNC plastic machining technology in the field of unmanned aerial vehicles is very extensive, and can provide high-precision, lightweight, and durable parts and components for these applications:
Aircraft body shell: CNC plastic machining technology can produce highly matched dimensions, and lightweight, and durable unmanned aerial vehicle body shells. These shells can withstand high-speed movement and strong impact while providing enough space to accommodate various components of the drone.
Suspension and landing gears: CNC plastic parts can be used to manufacture suspension and landing gears for unmanned aerial vehicles. These parts must be durable, lightweight, and have a certain degree of elasticity to ensure the smoothness and stability of the drone during landing and takeoff.
CNC plastic machining technology in automotive manufacturing mainly includes three main areas: interior parts, lamp covers and lamp holders, and battery boxes.
Interior parts: CNC plastic machining technology is used to manufacture automotive interior parts, such as dashboards, door panels, and central control panels. These parts must have high precision and a beautiful appearance, as well as be durable, and easy to clean and maintain.
Lamp covers and lamp holders: CNC plastic machining technology can be used to manufacture automotive lamp covers and lamp holders, such as headlights, taillights, and turn signals. These parts must have high precision and durability to ensure that they can work normally in harsh weather and road conditions.
Automotive battery box: CNC plastic machining technology can be used to manufacture automotive battery boxes, which must have good sealing, high precision, and corrosion resistance to ensure the safety and reliability of the battery under various conditions.
The application of CNC plastic machining in the medical field is extensive, and commonly used for manufacturing medical casings, instrument components, and medical consumables:
Medical equipment casing: mainly includes casings for medical handheld instruments and testing equipment. These casings must meet hygiene standards and safety requirements, as well as high precision and durability.
Medical equipment components: mainly including handles, clamps, connectors, etc.
Medical consumables: including infusion sets, syringes, blood collection devices, etc.
What are the common application fields of plastics?
Plastics have a wide range of application fields in daily life, such as packaging, construction, automotive, medical, electronics, toys, and home furnishings. Plastic products have the advantages of being lightweight, easy to process, and low-cost, so they are widely used.
There are many types of plastics, including polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polycarbonate (PC), polyamide (PA), etc. Each type of plastic has different physical properties and uses, and needs to be selected according to specific application scenarios.
When carrying out plastic CNC machining, attention should be paid to the following issues: material selection, design and model preparation, tool selection and maintenance, processing parameter setting, and surface treatment after processing.
Common surface treatment methods for plastic CNC parts include sandblasting, polishing, painting, anodizing, and electroplating. The appropriate surface treatment method should be selected according to the specific requirements of the part’s appearance and performance.