Measuring system for determining a material characteristic value characterizing the impact properties of plastics

摘要

Measuring system for determining a material characteristic value characterizing the impact strength properties of plastics, comprising - a compounding device (3; 3c) for producing a plastic strand (2), - one of the compounding device (3; 3c) in a transport direction (8) of the plastic strand ( 2) downstream measuring device (28; 28a to 28c) with - a guide (79; 79a to 79c) for the plastic strand (2), - a striking element (90) for exerting an impact on the plastic strand (2), which can be driven in rotation about an axis of rotation (89) by means of a drive motor, and - at least one measuring sensor (80, 91 to 94; 80, 91 to 94, 100) for measuring at least one measuring signal (D, M, ω, PE, F; D, M, ω, PE, F1, F2), which characterizes an impact work (W) performed on the plastic strand (2) during the impact, and - a control device (7) for determining at least one of the impact properties of the plastic -Strands (2) characterizing material characteristic value (K) from the at least one measurement signal (D, M, ω, PE, F; D, M, ω, PE, F1, F2), characterized in that - a plurality of striking elements (90) designed as pins are arranged on the circumference of a rotor (87).