Shenzhen HSJ Metal Fabrication Co., Ltd.
Shenzhen HSJ Metal Fabrication Co., Ltd.

CNC Machining Plastic Parts

CNC Machining Plastic Parts

HSJ Fabrication stands as the epitome of excellence in the world of CNC machining plastic parts. As a seasoned manufacturer, we pride ourselves on our unwavering commitment to precision and quality. Our state-of-the-art facilities and skilled team enable us to provide top-notch processing services for a diverse range of plastic materials. Whether your project demands parts made from PE, PU, PVC, acrylic, or any other plastic, we have the expertise to deliver outstanding results. We invite you to reach out and explore the possibilities with HSJ Fabrication. For inquiries, quotes, and expert guidance on your specific requirements, don't hesitate to contact us today. Your vision is our priority, and together, we can bring it to life with precision and excellence.

Materials for CNC Machining Plastic Parts

When CNC machining plastic parts, selecting the right materials is crucial to achieve the desired characteristics, such as strength, durability, and appearance. Here are some common plastic materials used for CNC machining:

MaterialsOther NameDescription

Acrylic is transparent and has excellent optical properties.

It's often used for parts requiring clarity, such as display cases and lenses.

Acrylic is relatively brittle compared to other plastics.


Polyethylene is known for its chemical resistance and low friction properties.

It's used for parts like gears, bushings, and containers.


Polypropylene is lightweight, durable, and resistant to chemicals.

It's used for applications like automotive components and medical devices.

DelrinPolyoxymethylene or POM

Delrin is a strong, rigid plastic with low friction properties.

It's commonly used for precision parts like gears and bearings.

PolyesterPET, PBT

Polyester plastics have good electrical insulating properties.

They are used for electrical components and connectors.


Polyurethane is flexible, abrasion-resistant, and can mimic rubber-like properties.

It's used for seals, gaskets, and prototyping.

Polyvinyl ChloridePVC

PVC is known for its chemical resistance and low cost.

It's used in plumbing, electrical conduit, and signage.

High-Density PolyethyleneHDPE

HDPE is known for its high strength-to-density ratio.

It's used for various applications, including bottles, containers, and cutting boards.


Nylon is known for its high strength, toughness, and wear resistance.

It's used for gears, bearings, and mechanical parts.


Polycarbonate is known for its excellent impact resistance and optical clarity.

It's used for applications like safety shields, goggles, and electronic enclosures.

When selecting a plastic material for CNC machining, consider factors such as the mechanical properties required for your specific application, environmental conditions, chemical exposure, and regulatory compliance. Additionally, the choice of material may affect machining parameters, such as cutting speeds and tool selection, so consult with your CNC machining provider or refer to material data sheets for guidance on machining specific plastics.

HSJ CNC Plastic Parts Machining Process

CNC (Computer Numerical Control) machining of plastic parts is a common manufacturing process used to create precise and complex components from various types of plastic materials. Here's an overview of the process:

1. Design and CAD Modeling:

Begin by designing your plastic part using computer-aided design (CAD) software. Create a 3D model of the part, specifying dimensions, tolerances, and any required features.

2. Material Selection:

Choose the appropriate plastic material based on your part's requirements, considering factors like mechanical properties, chemical resistance, and appearance.

3. CNC Programming:

Convert your CAD design into a CNC program using CAM (Computer-Aided Manufacturing) software. The program generates toolpaths and instructions for the CNC machine to follow.

4. Machine Setup:

Set up the CNC machine for plastic machining. This includes securing the plastic workpiece to the machine's worktable and installing the appropriate cutting tools, such as end mills or drills.

5. Cutting Parameters:

Configure the cutting parameters, including spindle speed, feed rate, and toolpath strategy. The optimal parameters depend on the plastic material, tooling, and part geometry.

6. CNC Machining:

Start the CNC machine, which follows the programmed toolpaths to cut, mill, drill, or engrave the plastic workpiece. CNC machines are highly precise and can create intricate shapes with tight tolerances.

7. Quality Control:

Inspect the machined plastic part during and after the machining process to ensure it meets design specifications. Measurements, visual checks, and other quality control methods may be used.

8. Post-Processing:

Depending on the part's requirements, you may need to perform additional processes such as deburring, polishing, or surface finishing to achieve the desired appearance and functionality.

9. Assembly (if required):

If your project involves multiple plastic components or integration with other parts, you may need to assemble them into the final product.

10. Packaging and Shipping:

- Once the plastic parts meet the quality standards, they can be packaged and prepared for shipment or further use.

Common CNC machining techniques used for plastic parts include milling, turning, drilling, and engraving. The choice of technique and tooling depends on the complexity of the part and the desired outcome.

Choose HSJ for Custom CNC Plastic Parts

When choosing a supplier for custom CNC plastic parts, it's essential to consider several factors:

  • 1.Expertise and Experience: Look for a supplier with a proven track record in CNC machining of plastic materials. They should have experience working with the type of plastic material you require for your parts.

  • 2.Capabilities: Ensure that the supplier has the CNC machinery and equipment needed to meet your project's specifications and complexity.

  • 3.Quality Assurance: Check if the supplier has a robust quality control process in place to ensure the parts meet your design specifications and quality standards.

  • 4.Materials Selection: Verify that the supplier offers a variety of plastic materials to choose from, allowing you to select the one that best suits your project's requirements.

  • 5.Customization: Ensure that the supplier can handle custom projects and adapt to your specific design needs.

  • 6.Lead Time: Consider the supplier's lead times and production capacity to ensure they can meet your project's timeline.

  • 7.Cost: Obtain quotes from the supplier and compare them to your budget.

  • References and Reviews: Seek out reviews and references from past clients to gauge the supplier's reputation and customer satisfaction.

  • 8.Communication and Support: Evaluate the supplier's communication and support capabilities. Clear and responsive communication is essential for a successful project.

Before selecting HSJ or any other supplier, it's advisable to conduct thorough research and possibly request quotes or samples to assess their suitability for your CNC plastic parts project. Additionally, you may want to consult with colleagues or industry peers for recommendations and insights into potential suppliers.

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