Stiffness tester of paper and paperboards, and method thereof for automatically controlling chuck restoration

Abstract

The invention provides a stiffness tester of paper and paperboards, and a method thereof for automatically controlling chuck restoration. The stiffness tester comprises a workbench, a clamping chuck, a pressure detecting knife, a driving mechanism and an automatic restoration device. The driving mechanism comprises a rotating wheel and a driver. The rotary shaft of the clamping chuck is connected to the rotating wheel. The driver can drive the rotating wheel to rotate so that the clamping chuck is driven to rotate. The automatic restoration device comprises a photoelectric sensor, a controller, and a detecting plate disposed at the periphery of the rotating wheel. The detecting plate is provided with a detection mechanism capable of being detected by the photoelectric sensor. The photoelectric sensor is disposed at the bottom of the workbench and is connected to the controller. The controller is connected to the driver. Compared with the prior art, through the photoelectric sensor and the controller, the stiffness tester can allow the clamping chuck to be automatically adjusted to the initial position, namely, a position where the plane of a sample clamped by the clamping chuck is perpendicularly intersected with the knife edge of the pressure detection knife. No error exists and testing results can be more accurate.

Description

technical field [0001] The invention relates to the technical field of paper and cardboard stiffness test equipment, in particular to a paper and cardboard stiffness tester and a method for automatically controlling chuck reset. Background technique [0002] Some industries that use special paper, such as paper cups, milk paper bags, etc., need to test the stiffness of the paper used in the product to ensure the quality before the product goes on sale. Before the test of the paper and cardboard stiffness tester, it is necessary to ensure that the plane of the chuck holding the sample and the edge of the pressure testing knife are exactly perpendicular to each other, so as to ensure the accuracy of the test data. If the plane of the chuck holding the sample and the pressure testing knife Knife edges that do not intersect perpendicularly will result in undersized or oversized test results. Accidental power failure during the test, or manual rotation of the chuck will cause th...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of stiffness tester for paper and cardboard, to solve the problem that the plane of the paper and cardboard stiffness tester in the prior art does not intersect perpendicularly with the plane of the clamping sample and the edge of the pressure detection knife. Manually adjust the edge of the collet or pressure detection knife, but there will be errors, which will lead to technical problems of deviation in test results

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