Constant-force tensioning mechanism and tufting machine

Abstract

The invention relates to a constant-force tensioning mechanism and a tufting machine, and relates to the technical field of tufted carpet processing. The constant-force tensioning mechanism comprisesan air pump, a main pipe, branch pipes, pistons and a first pulley, wherein the air pipe communicates with an air outlet port of the air pump; a plurality of the branch pipes are arranged and communicate with the main pipe separately; the branch pipes are arranged in a manner of being uniformly distributed in the length direction of the main pipe; a plurality of the pistons are also arranged and form one-to-one correspondence with the branch pipes; the diameter of each piston is adaptive to the diameter of the corresponding branch pipe; each piston is slidably connected with the correspondingbranch pipe in the length direction of the corresponding branch pipe; the first pulley is connected to one end away from the main pipe, of each piston; and a fiber yarn is wound on the peripheral surface of the first pulley and in rolling connection with the first pulley. The tufting machine comprises a frame, a loading mechanism, a tufting mechanism, an unloading mechanism and the constant-forcetensioning mechanism. According to the constant-force tensioning mechanism and the tufting machine, under the action of a tufting needle and the constant-force tensioning mechanism, the fiber yarn isuniformly pulled into ring-shaped tufts on a base cloth, so that the aesthetic feeling of a tufted carpet is improved, and the durability of the tufted carpet is improved.

Description

technical field [0001] The invention relates to the technical field of non-woven carpet processing, in particular to a constant force tensioning mechanism and a tufting machine. Background technique [0002] Tufted carpets and non-woven carpets are currently the largest types of industrial carpets. Compared with non-woven carpets, tufted carpets use needles to pierce polypropylene, nylon, polyester and other fiber materials on the base fabric, and use tufting needles to pierce these fibers. The fibrous material is hooked and retracts the tufting needles as the needles are retracted so that these fibrous materials form a loop-shaped pile on one side of the base fabric. Due to the existence of loop pile, the thickness of the carpet is increased, the foot feeling is improved, and more importantly, the elasticity and durability are improved. [0003] At present, the publication date is November 24, 2017, and the Chinese invention patent application with the publication number C...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing technical solutions have the following defects: all the tension force of the fibers is provided by the drafting roller group, and a plurality of fiber filaments are wound on one drafting roller group, so the drafting roller group cannot provide the tension for multiple fibers. The silk provides a constant tension, so that when producing tufted carpets, the size of the loop piles will be different, which reduces the aesthetic feeling of the tufted carpets; Durability of tufted carpet

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