The Operating Principles of a Jute Sliver Thickness Detector

Abstract

The mass profile of textile slivers is required for process control and routine testing. It can be derived from the thickness profile got by passing the material between loaded cylindrical rollers, provided the effects of different test conditions and the relation between thickness and mass are known. These have been examined for jute finisher card slivers. The effects of roller diameter, compressive force, and throughput speed have been included in a single relation. Diameter affected the area compressed only, and through put speed was unimportant for compression times longer than 0.1 sec. Thickness was proportional to mass for the short lengths of sliver under instantaneous compression. Fiber moisture content and denier had negligible effect on the thickness over the ranges of practical interest, fiber alignment being more important. The compression characteristics of slivers loaded statically under a plane shoe are discussed, also.