Development and Application of Double Side Injection Casing System for Thin Layer Material

Aiming at the problems of uneven casing,low casing utilization and tobacco buildup on cylinder wall associated with traditional casing cylinder,a double side injection casing system for thin layer material was developed.The casing system was mainly composed of loosening and distributing device,high-speed thin layer spreading device,double side multi-point injection casing nozzles,filtration adsorption device,etc.Strips were spread to form a continuous strip curtain,casing was injected via nozzles on both sides of the strip curtain to ensure casing uniformity.The floated atomized casing droplets were drawn through the strip layer by means of suction air,and the utilization of casing was promoted by the filtrating adsorption of strip layer.The casing chamber was in the form of asymmetric perforating hood to keep the pressure in balance between inside and outside of the chamber and minimize the contact between strips and chamber wall.For casing cigarette brand "Golden Leaf"(YDH),the new casing system and casing cylinder were compared in terms of processing quality,product quality and the consumption of energy and material.The results showed that,the new system's casing precision was 0.08%,its casing uniformity coefficient and casing utilization increased by 1.69 and 13.7 percentage points respectively,the amount of tobacco buildup on the wall reduced by 4.1 kg/shift,the score of cigarette sensory quality raised by 0.5 points,and the comprehensive processing cost saved by 6.97 RMB yuan per case.