CNC Machining PMMA (Acrylic)

Over the past 14 years, Flourish Legend has established itself as a professional manufacturer specializing in precision CNC machining service of PMMA. Regardless of the precision and complexity of the products, we are capable of providing automated machining processes, comprehensive project management, cutting-edge assembly lines, and efficient logistics services. Our mission has always been to assist customers in manufacturing high-quality parts at competitive prices and with fast delivery times. PMMA, as a common plastic sheet material, finds wide applications in industries such as construction, architectural furniture, and more. Discover immediately how you and your company can leverage our services.





CNC Machining PMMA Basics

Polymethyl methacrylate (PMMA), also known as acrylic or organic glass, is a polymer with high transparency, low cost, and ease of mechanical processing. It is commonly used as a substitute for glass and finds wide applications in various fields such as construction, decorative, advertising, electronics, communications, and transportation. PMMA's properties can be described as follows:

Properties	Performance	Description
Physical Properties	Lower Density	PMMA has a density of approximately 1.15-1.19 g/cm³, which is half that of glass (2.40-2.80 g/cm³) and 43% of aluminum (a lightweight metal).
	High Mechanical Strength	With a molecular weight of around 2 million, PMMA is a long-chain polymer that exhibits high mechanical strength. Its tensile and impact resistance are 7-18 times higher than ordinary glass. Through heat treatment and stretching, PMMA can achieve improved toughness. For instance, when a nail is driven into this treated PMMA, it won't crack even if pierced, and it doesn't shatter when penetrated by a bullet. As a result, stretched PMMA is used for bullet-resistant glass and cockpit canopies in military aircraft.
	Lower Melting Point	PMMA has a lower melting point compared to glass, significantly lower than temperatures around 1000 degrees Celsius.
	High Light Transmittance	Visible Light: PMMA is one of the most transparent polymer materials, with a light transmittance of 92%, surpassing that of glass.
		Ultraviolet (UV) Light: While quartz can fully transmit UV light, its high cost limits its practical use. Ordinary glass only transmits 0.6% of UV light. PMMA can effectively filter out UV light with wavelengths below 300nm, although its filtering efficiency is less effective between 300nm and 400nm. Some manufacturers apply coatings to the surface of PMMA to enhance its filtering properties in the 300nm to 400nm range. Additionally, PMMA exhibits better stability under UV irradiation compared to polycarbonate.
		Infrared (IR) Light: PMMA allows infrared light with wavelengths below 2800nm to pass through. It can effectively block longer-wavelength IR, primarily those below 25,000nm. Special colored PMMA variants exist that selectively transmit specific wavelengths of IR while blocking visible light, making them suitable for applications such as remote control or thermal sensing.
		PMMA's glass transition temperature is approximately 105°C.
Chemical Properties	Colorless and Transparent	PMMA exhibits a transparency of 90%-92% and possesses high toughness, more than ten times that of silica glass.
	Weathering Properties	Excellent Optical, Insulating, Processing, and Weathering Properties.
	Soluble	Soluble in organic solvents such as carbon tetrachloride, benzene, toluene, dichloroethane, chloroform, and acetone.
	High transparency and brightness	Good heat resistance, and characteristics of toughness, hardness, and rigidity. The heat deformation temperature is 80℃, and the bending strength is 110 MPa.
	Density	1.14-1.20 g/cm³; deformation temperature: 76-116℃; molding shrinkage: 0.2-0.8%.
	Linear expansion coefficient	0.00005-0.00009/℃; heat deformation temperature: 68-69℃ (74-107℃)."

 

Custom CNC PMMA Machining (Acrylic) Parts

Polymethyl methacrylate (PMMA), also known as acrylic or organic glass, is a high molecular weight polymer. It is highly transparent, cost-effective, and easy to machine, making it a commonly used substitute for glass.Industries where PMMA finds wide applications include:



Instrumentation Industry

Automotive Industry

Optical Lens Industry

Transparent Tubing Industry

Sanitary Ware Industry

Building and Construction Materials Industry



Advantages of Using CNC Machining for PMMA (Polymethyl Methacrylate) Material

CNC machining is an advanced manufacturing technique widely used in the industry. Here are four advantages of using CNC machining for PMMA (Polymethyl Methacrylate) material:



High Precision

CNC machining provides highly accurate machining capabilities, which is crucial for producing high-precision PMMA parts. By utilizing computer-controlled precision tool paths, CNC machines can achieve precise CNC plastic cutting, carving, and drilling operations on PMMA CNC material, ensuring the accuracy of the final product's dimensions and shapes.



Complex Shape Fabrication

PMMA material exhibits excellent plasticity and processability, allowing for the production of various shapes and intricately designed parts. CNC machining, by generating precise cutting paths based on the designed CAD models, can accurately fabricate complex shapes, curves, and surface details on PMMA material.



Efficient Production

CNC machining is an efficient manufacturing method that can automate complex cutting operations, significantly improving production efficiency. Once the programming is set, CNC machines can run continuously and stably without the need for manual intervention, reducing operator workload and the possibility of human errors. This makes CNC machining PMMA material an ideal choice for batch production and large-scale manufacturing.



Flexibility and Reproducibility

CNC machining allows for quick changes to the machining process and parameters, providing greater flexibility. If design modifications or new PMMA parts need to be produced, they can be easily achieved by simple modifications to the CNC program. Additionally, CNC machining enables high reproducibility, ensuring precise control and guarantee of the size, shape, and quality of each part, even in large-scale production.