CNC Plastic Machining Service from Yixing

CNC Plastic Machining Supplier | Custom Plastic Parts Manufacturer

Shanghai Yixing Machining is equipped with full range of machining equipment to do plastic milling and turning. You can enjoy great machining quality and competitive price in our workshop. There is a wide range of plastic plate stock ready for instant CNC machining. Quick delivery time can be ensured. Our skilled machinists is proficient in manufacturing customized CNC machined plastic parts with close tolerance. We will never let our competitive price compromise quality.

Advantages of CNC Plastic Machining

*No mold investment

Unlike injection molding, CNC plastic machining requires no tooling/mold. It can save a large mount of initial investment. Many people choose CNC machining to do prototypes for design verification.

*Fast Turnaround

With no mold production, CNC plastic machining is very suitable for prototypes and short run production. We can make several or dozens in one week.

*Tighter Tolerance

Machined plastic parts have tighter tolerance than injection molding parts. It can meet some special requirement from customers.

Common Plastic Materials for Machining

1. ABS

ABS is one of the most common thermoplastic materials, with good mechanical properties, excellent impact strength, high heat resistance, and good machinability.
ABS has a low density and is very suitable for lightweight applications. ABS parts processed by CNC are usually used as prototypes before injection molding mass production.
Typical density: 1.00-1.05 g/cm³

3. Polycarbonate(PC)

Polycarbonate is a thermoplastic with high toughness, good mechanical processing properties, and excellent impact strength (superior to ABS). It can be colored, but is usually optically transparent, making it very suitable for a wide range of applications, including fluid devices or automotive glass.
Typical density: 1.20-1.22 g/cm³

5. PTFE (Teflon)

PTFE, commonly known as Teflon, is an engineering thermoplastic with excellent chemical and heat resistance, making it the lowest friction coefficient among any known solid.
Polytetrafluoroethylene (PTFE) is one of the few plastics that can withstand working temperatures above 200 ℃ and is an excellent electrical insulator. However, it has pure mechanical properties and is typically used as a lining or insert in components.
Typical density: 2.2 g/cm³

7. PEEK

PEEK is a high-performance engineering thermoplastic with excellent mechanical properties, thermal stability over a wide temperature range, and excellent resistance to most chemicals.
PEEK is often used to replace metal parts due to its high strength to weight ratio. Medical grade is also available, making PEEK suitable for biomedical applications.
Typical density: 1.32 g/cm³

2. Nylon

Nylon, also known as polyamide (PA), is a thermoplastic commonly used in engineering applications due to its excellent mechanical properties, good impact strength, high chemical resistance, and wear resistance. But it is easy to absorb water and moisture.
Nylon 6 and nylon 66 are the most commonly used grades in CNC machining.
Typical density: 1.14 g/cm³

4. POM

POM is usually known under the trade name Delrin and is the engineering thermoplastic with the highest mechanical processing performance among plastics.
POM (Delrin) is usually the best choice for CNC machining of plastic parts that require high precision, high stiffness, low friction, excellent high-temperature dimensional stability, and extremely low water absorption.
Typical density: 1.40-1.42 g/cm³

6. HDPE

High density polyethylene (HDPE) is a thermoplastic with high strength to weight ratio, high impact strength, and good weather resistance.
HDPE is a lightweight thermoplastic suitable for outdoor use and pipelines. Like ABS, it is typically used to create prototypes before injection molding.
Typical density: 0.93-0.97 g/cm³

FAQs

What is The Difference Between Injection Molding and Plastic CNC Machining?

1.Materials
The raw materials for injection molding are generally plastic particles, which are melted by heating and filled into molds, and then cooled to form products. And machining uses various solid plastic plate for processing.
2.Forming principle
The molding principle of injection molding is to inject melted plastic materials into the mold under high pressure, and the cavities in the mold are designed according to the product model. After the material cools down, it can form the required product inside the mold. Plastic machining is the use of mechanical cutting principles to remove materials from solid plate into the desired shape.
3.Product accuracy
The precision of injection molded products is not very high. Compared with injection mold parts, CNC machined plastic parts have much higher tolerance and it is best for some specific industries with some tolerance must be met.
4.Cost and efficiency
Injection molding technology has shorter processing time than machining and can quickly manufacture large quantities of products. However, machining requires multiple rounds of cutting and processing, which takes a long time and results in a smaller output. But at the same time, injection molding requires specialized injection molding machines and molds, and the cost of joint investment is relatively high. The cost of machining has a wide range of choices in material selection, allowing for flexible material selection to reduce costs.

In summary, the focus of injection molding and machining is different, and choosing according to the applicable scope will be more efficient.
What is The Difference Between CNC and 3D Printing?

CNC (Computer Numerical Control) machining and 3D printing are two different manufacturing technologies that differ in multiple aspects:
1.Processing method: CNC machining is a material reduction manufacturing technology that uses high-speed rotating cutting tools to cut off excess parts from a fixed material to form the desired shape of the part; 3D printing is an additive manufacturing technology that creates three-dimensional objects by stacking materials layer by layer.

2.Material utilization rate: CNC machining usually requires larger material blocks because there is a lot of waste during the machining process; 3D printing can save a lot of materials, especially when using industrial grade 3D printers.

3.Precision and complexity: CNC machining typically provides high dimensional accuracy and repeatability, making it suitable for machining complex surfaces and irregular structures; The accuracy of 3D printing may vary depending on the device, but it is usually able to handle more complex geometric shapes, such as hollow parts and parts with more internal angles.

4.Processing time and cost: CNC machining usually requires a longer time and higher cost, especially for complex shaped parts; 3D printing can quickly shape small batches of parts, suitable for rapid prototyping and customized production.

5.Material selection: CNC machining can use multiple materials, including metal and plastic, etc; 3D printing has a wide range of materials, including liquid resin, nylon powder, metal powder, etc.

6.Applicable scenarios: CNC machining is suitable for parts that require high precision and large-scale production; 3D printing is suitable for prototyping, customized production, and manufacturing of complex geometric shapes.

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Shanghai Yixing Machining

Shanghai Yixing is a machining factory in China with more than 15 years experience. We have manufactured and shipped millions of machining, turning and milling metal and plastic parts to USA, Canada, Germany, UK, Australia etc.

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