This testing machine is used for double-notch sample preparation of ultra-high-molecular-weight polyethylene (PE-UHMW) molding materials. In order to facilitate the measurement of double-notch impact strength of simply supported beams. It is used with a simply supported beam (charpy) impact tester to complete the determination of the double notched impact strength of a simply supported beam of PE-UHMW molding materials. It can also be used for the notch preparation  of  FNCT and PENT samples.

B. Reference standard

GB/T 32682 (Ultra-high molecular weight polyethylene pipe)
QB/T 2668.1 (Ultra high molecular weight polyethylene pipe)
ISO16770 (Plastics - Determination of Environmental Stress Rupture (ESC) of Polyethylene)
ASTM F 1473 (Standard Test Method for Notched Tensile Testing for Measurement of Slow Crack Growth Resistance of Polyethylene Pipe and Resins)

C. Technical indicators

• Blade cutting end angle: 14°±2°
• Clamping width adjustment range: 4mm~15mm (adjustable)
• Tool thickness: 0.23mm±0.03mm
• Blade spacing: 4±0.005mm adjustable
• Blades: I install 2 pieces with the host
• Cutting accuracy: ±0.02mm or the same as the standard gauge block

• One-time feeding, double blade cutting at the same time, no need to turn over the sample, simple and convenient operation
• Two-way T-shaped screw rod is used to adjust the style and feed, the two knives cut together, move at the same time and the moving distance is equal, there is no radial deformation, and the human error caused by the movement is reduced
• During the cutting process, the style is tightened first, and then cut, the wear of the tool is reduced, and the service life is prolonged
• The blade is embedded, only the cutting head of the whole blade is exposed, and there is no gap between the blade body and the fixed block, so that the blade has no vibration and the blade does not bend, which improves the coincidence accuracy of the two blades
• The blade is made of high carbon steel, which has high strength and is not easy to wear.