Selection of criteria for achieving heat and moisture resistance of plucker finger of poultry equipment

Abstract

The paper presents the results of studies to increase the life of plucker fingers of poultry farms operating under cyclic deformations in an environment of elevated temperatures and humidity. The limiting indicators of the rubber base of different nature on the elastic-strength indicators of vulcanizes are established. The defining criteria of running life are identified: fatigue resistance to dynamic loads and resistance to thermal-oxidative ageing in a vapour environment. The choice of the nature of rubber according to the criterion of resistance of vulcanizes to thermal ageing was made. Limitations of vulcanizes based on single polyisoprene have been proved due to their instability to thermooxidative ageing. The composition of heat-and-moisture-resistant vulcanizes has been developed. The required level of elastic-strength characteristics before and after wet thermal ageing provided: the combination of polybutadiene and polyisoprene and combination of ingredients. The proposed method of regulating the hardness and modulus of the vulcanizes change in the content accelerator high activity of thiuram disulphide. The effect of thiuram sulfide additives on the kinetics of vulcanization of rubber mixtures and elastic-strength parameters of vulcanizes was studied. The molecular characteristics of the obtained vulcanizes are given. A solution was found to replace foreign-made products. A method is proposed for regulating the hardness and modulus of vulcanizes by changing the content of a high-activity accelerator–thiuram sulfide. This article presents the study of the thiuram sulfide additives effect on the kinetics of vulcanization of rubber mixtures and elastic-strength parameters of vulcanizes. The solution found is to replace foreign-made products.