Device for measuring thermal expansion coefficient of wood-plastic composite

Abstract

The invention provides a device for measuring the thermal expansion coefficient of a wood-plastic composite and relates to the technical field of measurement of thermodynamic property of materials. The device comprises an incubator, a sample rack, a horizontal rack, a vertical rack and a heating system, wherein a cavity is formed in the incubator; the sample rack is located in the cavity in the incubator; the horizontal rack and the vertical rack are perpendicularly connected; a sliding locking part is arranged at a first end of the horizontal rack and a displacement measurement system is arranged at a second end; a sliding locking part is arranged at a first end of the vertical rack and a displacement measurement system is arranged at a second end; the heating system is arranged in the cavity in the incubator. By the aid of the horizontal rack and the vertical rack which are perpendicularly arranged, change of thermal expansion sizes of the material in both length and width directionsis measured under a heating condition or certain temperature condition, and the thermal expansion coefficient performance of the material is represented more scientifically and accurately.

Description

technical field [0001] The invention relates to the technical field of measuring thermodynamic properties of materials, in particular to a device for measuring the coefficient of thermal expansion of wood-plastic composite materials. Background technique [0002] Wood-plastic composite material refers to the use of polyethylene, polypropylene and polyvinyl chloride, etc., instead of the usual resin adhesive, mixed with more than 50% of waste plant fibers such as wood powder, rice husk, straw, etc. Sheets or profiles produced by extrusion, molding, injection molding and other plastic processing techniques. Mainly used in building materials, furniture, logistics packaging and other industries. The coefficient of thermal expansion refers to the expansion and contraction of objects due to temperature changes. Its ability to change is represented by the change in length value caused by unit temperature change under constant pressure (p is constant), that is, the coefficient of ...

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a thermal expansion coefficient measuring device for wood-plastic composite materials, which solves the problem that the existing thermal expansion coefficient detection device can only detect the variation of the length, width or thickness of the sample in a single detection. A technical issue that resulted in an inaccurate and timely response to the coefficient of thermal expansion of the material

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