Leather flattening mechanism of vacuum drying machine

Abstract

The invention relates to a leather flattening mechanism of a vacuum drying machine. The mechanism comprises a lifting mechanism, a movable base, a pressing foot and a leather shoveling mechanism. The lifting mechanism comprises a cantilever horizontally above a drying platen, and a lifting column vertically arranged at the lateral end of the drying platen. The movable base is installed at the lateral end of the side, away from the lifting column, of the cantilever. The pressing foot is installed at the lower end of the movable base and is connected with the movable base through a telescopic mechanism. The leather shoveling mechanism comprises a plurality of annularly distributed rotary arms, and one end of each rotary arm is hinged to the movable base. A torsion spring or tension spring is further installed at the position, where each rotary arm is hinged to the movable base, on the rotary arm. The rotary arms can be driven by unfolding mechanisms to be unfolded outward. A scraper knife and a knife roller are installed at the bottom end of each rotary arm. The leather flattening mechanism has the advantages that leather laid on the drying platen can be automatically flattened by means of the leather flattening mechanism, the mechanism is very convenient to use, manual flattening is not needed, and accordingly manual labor is reduced.

Description

technical field [0001] The invention relates to a leather drying device, in particular to a leather spreading mechanism of a vacuum dryer. Background technique [0002] In the leather manufacturing process, the moisture content of leather needs to be reduced from 60%-75% to 16%-18% after wet processing, and the solvent and moisture brought in during the finishing process also need to be removed. At present, tanneries at home and abroad generally adopt the evaporation drying method, that is, the water or solvent in the leather is first turned into steam, and then the steam is driven away. The vacuum dryer is the main equipment of the evaporative drying method. In a vacuum state, the heat source supplies enough heat to the water in the leather through conduction heating, so that the water evaporates and boils, and the vaporization speed is accelerated. At the same time, vacuuming quickly extracts the vaporized steam and forms a negative pressure state around the leather. A la...

AI Technical Summary

Problems solved by technology

[0003] Before using the vacuum dryer to dry the leather, it is necessary to manually lay the leather on the vacuum table of the vacuum dryer, and the leather needs to be flattened, and because the vacuum table of the vacuum dryer has a large vertical and horizontal span, so When laying the leather manually, it is necessary to arrange the leather around the dryer, or even climb directly on the vacuum table to flatten the leather, which is relatively cumbersome, which results in low drying efficiency of the leather and wastes a lot of manpower and material resources; In addition, when the operator arranges the leather on the platen, his body is located under the upper platen or the cover, so there is a certain potential safety hazard

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