Compression molding mechanical property testing device for loose materials

Abstract

The invention discloses a compression molding mechanical property testing device for a loose material. The device comprises a rack; a hopper used for applying materials into a feeding unit; the feeding unit provided with a plurality of loading rings for receiving materials; a cam used for rotating under the driving of a driving unit to apply pressure to a pressing unit, wherein a gap for accommodating the loading rings is formed between the pressing unit and a mold unit; the pressing unit used for pressing materials in the loading rings into the mold unit; the driving unit connected with the cam and the feeding unit through a first transmission mechanism and a second transmission mechanism respectively; the second transmission mechanism enabling the feeding unit to be separated from the driving unit in the downward moving process of the pressing unit, so that the loading ring located between the pressing unit and the mold unit is in a static state; when the pressing unit moves upwards to the highest position, the second transmission mechanism enabling the feeding unit to be connected with the driving unit so as to complete sequential conveying of the loading rings, so that one-by-one conveying of the loading rings is achieved; a measuring unit used for measuring mechanical parameters. The device is consistent with actual working conditions.

Description

technical field [0001] The invention belongs to the field of compression molding of loose materials designed for feed machinery, biomass energy, powder metallurgy, nuclear fuel pellets, etc., in particular to a mechanical performance testing device for compression molding of loose materials. Background technique [0002] Densification molding process refers to the technology of using molds to compress loose materials into products with regular shape and certain density. It has been widely used in feed and biomass fuel processing, nuclear fuel pellet production, powder metallurgy and other fields. At present, this technology mainly has problems such as unpredictable molding quality and high molding energy consumption, which seriously restricts the development of related industries. In order to solve this problem, relevant scholars at home and abroad have carried out a lot of research, mostly focusing on the influence of raw material characteristics, process parameters and equ...

AI Technical Summary

Problems solved by technology

This type of device can only press at a constant speed and measure the force exerted on the pressing rod. The pressing speed is low and the stress-strain relationship of the material during the molding process cannot be tested.

Patent ZL201310629828.9 mentions a multifunctional bulk material forming test device, which cannot realize high-speed pressing close to real working conditions, cannot run continuously, and cannot measure the stress-strain relationship of materials during the pressing process

Patent ZL201710396368.8 mentions a mechanical behavior test device and test method for the compact forming process of loose materials, which can test the stress-strain relationship in the process of forming loose materials, but it needs to be driven by a universal testing machine or a hydraulic cylinder, and the pressing speed It is far lower than the compact forming process of loose materials under actual working conditions, and continuous experiments cannot be carried out, and the collected data cannot accurately reflect the mechanical behavior of the compact forming process of loose materials under actual working conditions

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