Device and method for measuring hardness of cigarettes and filter sticks

Abstract

The invention provides a device and a method for measuring hardness of cigarettes and filter sticks. The device comprises an air-floatation pressing mechanism, a laser displacement measuring head (1) and a control unit, wherein the laser displacement measuring head (1) is positioned above the air-floatation pressing mechanism and is used for measuring respective position values in a prepressing state and a total pressing state; the control unit controls the air-floatation pressing mechanism to execute prepressing or total pressing operation; and the air-floatation pressing mechanism comprises a pressing weight (2), an air-floatation shaft supporting plate (3) and a prepressing weight (5), wherein the center of the pressing weight (2) is provided with a first through hole for laser to pass; the center of the air-floatation shaft supporting plate (3) is provided with a second through hole used for accommodating the prepressing weight (5), and the air-floatation shaft supporting plate (3) is supported under the pressing weight (2) to make the pressing weight (2) keep a preset distance from the prepressing weight (5); and the prepressing weight (5) is separably arranged in the second through hole, and the top of the prepressing weight (5) is fixed with a plug (4) of the laser displacement measuring head (1). The device and the method adopt gravity supported by air floatation for vertical pressing, and the pressing speed, pressing force and pressing time can be accurately controlled according to user requirements in a national standard range.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a device and method for measuring the hardness of cigarettes and filter rods. Background technique [0002] The hardness of cigarettes and filter rods is an important indicator of the quality control of manufacturers. According to the Chinese Tobacco Industry Standard YC / T28.6-1996: hardness is defined as the percentage of the diameter of the sample after radial compression to the diameter of the sample before compression within a certain period of time. The test instrument should be a device for pointing radial pressure on the sample, the pressure load is 2.94±0.01N, the diameter of the indenter is 12±0.01mm, the compression time is 15±1s, and the pressure speed is 0.55±0.05mm / s. In the point pressure test of cigarette and filter stick hardness, the pressure application speed, pressure application load and application time all have a certain influence on the determination o...

AI Technical Summary

Problems solved by technology

Although this method of horizontal pressure can control the speed and time of pressure to a certain extent, it cannot accurately check the magnitude of the pressure, and it cannot adjust the pressure error of the device itself due to external factors such as friction , leading to significant differences in test results

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