Tension-compression type measuring instrument for bending creep resistance of hard plastic

Abstract

The invention discloses a tension-compression type measuring instrument for bending creep resistance of hard plastic. The instrument comprises a base plate, a supporting vertical plate, a sample supporting rod, a tension-compression frame, a metal rope, a rotary table, a rotating shaft, a pointer and a weight, the gravity of the weight is transmitted to the tension-compression frame through the metal rope to apply tension-compression force upwards to the middle of a plastic sample strip, the metal rope is pressed in a groove in the outer edge of the rotary table, and the bending creep resistance of hard plastic is measured through rotating scales of the rotary table. The tension-compression type measuring instrument can accurately measure the bending creep resistance of the hard plastic, does not need to consume electricity in the long-time measurement process, and is simple and small in structure, reasonable in design, simple to manufacture, convenient to use, easy to operate and beneficial to popularization and application.

Description

technical field [0001] The invention belongs to the technical field of performance testing of materials, and in particular relates to a tension-compression measuring instrument for bending and creep resistance of rigid plastics. Background technique [0002] During the use of plastic products, under the action of force, due to the movement and slippage of macromolecular chains inside the plastic, creep may occur, resulting in changes in the shape and size of the plastic product, which will shorten the service life of the plastic product. It can measure the tensile creep of plastic splines under the action of tensile stress and the bending creep of plastic splines under the action of bending stress to measure the creep resistance of plastics. The creep process of rigid plastics is very slow under the action of stress, and the measurement of the creep value usually takes a long time, sometimes as long as several days or even months. Currently, there are instruments on the mark...

AI Technical Summary

Problems solved by technology

The creep process of rigid plastics is very slow under the action of stress, and the measurement of the creep value usually takes a long time, sometimes as long as several days or even months. Currently, there are instruments on the market for measuring the tensile and bending creep properties of plastics. There are disadvantages such as long-term power consumption, complex structure, and high manufacturing cost.

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