Plastic CNC Machining Service

YIJIN Hardware offers high-quality plastic machining services for a variety of industries, ensuring precision in every component. Our advanced CNC milling and laser cutting technologies enable us to work with plastics such as acrylic, HDPE, and POM, creating custom parts to meet your needs.

What is CNC Machining Plastic Parts?

CNC machining of plastic parts involves using computer-controlled machines to shape and finish plastic materials with high precision. This process is essential for producing custom plastic components in industries such as automotive, aerospace, medical devices, and consumer products. CNC machining solutions, including CNC milling service, CNC turning service, and drilling, allow for the creation of complex designs and intricate details in plastic parts, ensuring they meet specific performance and design requirements.

Types of Plastics Commonly Machined

There are many types of plastic parts, such as: PP, POM, Nylon, PMMA, ABS, Teflon, PEEK, PC, PVC, etc.

Type of Plastic	Common Name	Key Characteristics
PP	Polypropylene	Lightweight, good chemical resistance, and impact resistance.
POM	Acetal (Delrin)	High stiffness, excellent frictional characteristics, and good thermal stability.
Nylon	Polyamide	Strong, durable, and resistant to abrasion; good for mechanical parts.
PMMA	Acrylic	Strong thermoplastic, often used as an alternative to glass; can be brittle.
ABS	Acrylonitrile Butadiene Styrene	Good mechanical properties, impact strength, and easy to machine.
Teflon	PTFE	Low friction, excellent chemical resistance; suitable for sliding parts.
PEEK	Polyether Ether Ketone	High-performance thermoplastic with excellent mechanical and thermal properties.
PC	Polycarbonate	High impact resistance, can be transparent; suitable for demanding applications.
PVC	Polyvinyl Chloride	Versatile, good chemical resistance; used in a variety of applications.

What Are The Common Surface Treatments Of CNC Machining Plastic Parts?

In order to make the plastic parts look more beautiful and textured, the products are usually surface treated.

The common surface treatments of plastic machining are: Frosting, spraying, silk screen printing, pad printing, thermal transfer printing, water transfer printing, laser engraving, electrophoresis (water electroplating), vacuum coating, bite pattern (etching, skin texture) for plastic abrasives.

Electroplating and painting are common processing techniques for surface treatment of plastic parts.

YIJIN Hardware has more than 20 years of experience in the production of plastic products, no matter what kind of personalized design you have, YIJIN Hardware will provide you with one-stop custom machining service.

What Are The Common Surface Treatments Of CNC Machining Plastic Parts?

The CNC machining plastic parts have a wide range of applications, involving almost all industries, such as home appliances (most of the casings of home appliances are plastic products), toys, mobile phone casings, computer casings, auto parts, daily necessities and so on.

Plastic products can be found everywhere in our lives, which shows that their practicality and best-selling are very large.

Plastic CNC Machining Techniques

CNC Milling: CNC (Computer Numerical Control) milling is a common method for machining plastics. It allows for high precision and repeatability, making it suitable for complex shapes and detailed designs.
Laser Cutting: Laser cutting is often used for acrylic and other plastics, especially for intricate designs. It provides clean edges and can handle various thicknesses, although care must be taken to avoid melting.
3D Printing: While not traditional machining, 3D printing is increasingly used for creating plastic parts. It allows for complex geometries and rapid prototyping, although it may not achieve the same mechanical properties as CNC machined parts.
Waterjet Cutting: Waterjet cutting is another method that can be used for plastics. It uses high-pressure water to cut through materials without generating heat, which can be beneficial for heat-sensitive plastics.

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FAQs about Plastic Machining Services

What are the advantages of plastic machining services?

Precision: CNC machining offers high accuracy, making it ideal for parts that require tight tolerances.
Versatility: A wide range of plastics can be machined, making it suitable for various applications across different industries.
Cost-Effectiveness: For low to medium production runs, plastic machining can be more economical than other manufacturing methods, such as injection molding.
Customization: Machining services can produce custom parts tailored to specific requirements, which is especially useful for prototyping.

What considerations should be kept in mind during plastic machining?

Material Properties: Different plastics have varying properties, such as melting points and brittleness, which can impact the machining process. For example, acrylic may melt if not machined correctly.
Machining Parameters: Factors like feed rate, cutting speed, and tool selection are crucial for achieving the desired finish and preventing damage to the material.
Post-Processing: Some plastics may require additional finishing processes, such as sanding or polishing, to achieve the desired surface quality.

What Are The Common Problems Encountered In The CNC Machining Process Of Plastic Products?

1. Plastic Parts Produce Burrs

Plastic parts produce burrs (or flash, overflow, overflow): The occurrence of burrs is caused by the overflow of molten injection molding resin from the parting surface of the mold, which is the worst state in the forming operation.

Especially when the burr is firmly adhered to the parting surface of the mold and the mold is clamped, it will damage the parting surface of the mold.

If the mold is damaged in this way, new burrs will occur in the molded product when reworked. At the same time, it also aggravates the damage of the mold and makes it unusable.

So pay special attention.

Do not use excessive injection pressure
Improve clamping force
Take good care of the mold
Adjust injection volume, lower temperature

2. Surface Depressions

Surface depressions (or shrinkage pits) of plastic parts: Depressions are the most common surface defects of molded products.

It is a defect formed in the wall thickness part due to the volume change caused by the thermal shrinkage of the molded product.

Depression is a minor defect compared with insufficient forming. Often occurs when the mold cavity is filled with molten resin, but the holding pressure is not sufficient.

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