Theoretical Basis of Drying Recultured Cocoons

Abstract

Objective. To carry out scientific research on improving the technological properties of cocoon shells grown in repeated seasons and the quality of raw silk, as well as the development of pre-processing technology.

Methods. Killing and drying of cocoons grown in repeated seasons in the existing SK-150K unit in the main cocoon of Jayrakhona Maskan, Termiz District, Surkhandarya Region was carried out. For this purpose, the air temperature of the cocoons grown during the seasons in the SK-150K cocoon killing and drying unit was repeatedly increased from 75°C to 115 °C, every 5°C. During killing process, samples of 40 kg of living cocoons grown in each season were taken and tested until the cocoon temperature reached 37-42 °C.

Results. In this study, when cocoons grown in repeated seasons were killed in the control mode, the first season and second season cocoons in the experiment were not killed by 5-3%, respectively. Experiments were continued by increasing the set mode temperature and reducing it to 45 minutes for the first season cocoons. The temperature in the unit was tested in repeated experiments with every 50°C rise from 75°C to 115°C.

Conclusion. We conclude that the live cocoons loaded into the cocoon drying chamber SK-150K provided with the loading conveyor for loading the cocoons into the drying chamber along the surface of the upper horizontal conveyor for 48 minutes for the cocoons of the first season at a temperature of 110-115°C for the first season, and for the second cocoons of the season are treated at a temperature of 105-110°C for 45 minutes, cocoons of the third season are treated at a temperature of 95-100°C for 40 minutes, and cocoons of the fourth season are treated under the influence of hot air at a temperature of 75-80°C for 35 minutes. The optimal option is to leave it in a completely or partially dry state.