Laboratory 3-Axis CNC Milling Machine for Sample Preparation

Introduction to 3-Axis CNC Milling Machine (Special for Sample Prep)

The accuracy of mechanical test results depends not only on the calibration of the testing machine but equally on the quality of the “Sample Cutting.” The presence of the smallest burr, microscopic crack, or thermal stress at the edges of the specimen causes premature failure and erroneous results. The Laboratory CNC Milling Machine manufactured by Polymer Test converts raw material (sheets) into standard test parts without manual intervention.

Technical Features for Precise Polymer Cutting

Machining plastics is challenging because they melt quickly due to friction. This machine solves this problem with the following technologies:

• High-Speed Spindle (18,000 RPM): High rotational speed ensures very fast chip removal, leaving no opportunity for the part to heat up or melt.
• Single Flute End Mill: Uses specialized tools that accelerate chip evacuation and create a perfectly polished surface without distortion.
• High Motion Precision: Utilizes stepper motors equipped with Encoders to control the position of the X, Y, and Z axes with micron-level accuracy.

Application in Mechanical Testing Chain

This machine serves as a “Mother Station” in the laboratory, producing the necessary samples for other instruments:

• Cutting “Dog-bone” specimens for the Electromechanical Universal Tensile & Compression Testing Machine.
• Cutting precise rectangular specimens for the Digital Pendulum Impact Tester (Charpy & Izod).

International Standards

The cutting files of this machine are programmed exactly according to the drawings found in the following standards:

• Standard ISO 527 and ASTM D638 (Preparation of plastic tensile specimens).
• Standard ISO 179 and ISO 180 (Charpy and Izod impact specimens).
• Standard ISO 8256 (Tensile Impact) and ISO 6259.

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