Acrylic CNC machining Introduction, Advantages and Application

DALIAN, China - May 19, 2024 - PRLog -- Acrylic (PMMA) is an ideal material due to its strength, toughness, and transparency. But relying on traditional processing techniques to cut acrylic can be a complex process: this material is very fragile, and any excessive force can cause unnecessary damage.

However, CNC machining provides a reliable method for safely manufacturing acrylic parts, with the characteristics of high precision and minimal waste of acrylic materials.

Material Properties of Acrylic (PMMA) for CNC Machining

Understanding the material properties of acrylic is essential for achieving successful CNC machining outcomes. Here are some key properties of acrylic relevant to CNC machining:

Density:

1.18 g/cm³ – This influences the weight of the finished product and affects machining parameters like feed rate and speed.

Tensile Strength:

70 MPa (10,153 psi) – A measure of the maximum stress acrylic can withstand while being stretched or pulled before breaking.

Flexural Strength:

115 MPa (16,687 psi) – Indicates the amount of bending stress acrylic can endure without deformation.

Compressive Strength:

Around 90 MPa (13,053 psi) – The capacity of acrylic to resist squeezing forces.

Modulus of Elasticity:

3,000 MPa (435,113 psi) – This elastic modulus indicates the stiffness of acrylic, impacting its flexibility under load.

Transparency:

Acrylic exhibits excellent optical clarity, making it ideal for applications where transparency is desired. Transparent acrylic with a transmittance of up to 92%, this property allows for clear visibility through acrylic components, making it suitable for windows, displays, and lenses.

Impact Resistance:

Despite its transparency, acrylic is remarkably impact-resistant compared to glass. It is less prone to shattering or breaking upon impact, crucial for applications where durability is a concern.

Machinability:

Acrylic is relatively easy to machine using CNC processes. It can be cut, drilled, milled, and turned with precision to create intricate designs and complex shapes. Its machinability allows for the production of detailed components with tight tolerances.

Chemical Resistance:

Acrylic has good resistance to many chemicals, including acids, alkalis, and solvents. This property makes it suitable for applications where exposure to chemicals is expected, such as laboratory equipment and chemical processing environments.

Weather Resistance:

Acrylic exhibits excellent weather resistance, retaining its clarity and color stability even after prolonged exposure to sunlight and outdoor elements. This property makes it suitable for outdoor signage, architectural features, and marine applications.

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