Development And Experiment Of The Top-pouring Machine For Sealing Paraffin On Preserved Eggs

Preserved egg is the traditional food of China, boasting the most production of all eggs products in China. Preserved egg is wrapped by mud mixed with ash and bran, edible paraffin or vacuum plastics to prevent the moisture dissipation and the microbial invasion improving the storage time. However, the traditional method to retain freshness of preserved eggs such as wrapping the mud does not meet the requirement of quarantine, convenient and health. Therefore, some enterprise wrap preserved eggs with edible solid paraffin in retaining the freshness. But few formed machines can be applied to practical production. As a result, some companies generally use edible solid paraffin by hand to keep freshness. According to this, this paper researches and develops the top-pouring machine for sealing paraffin on preserved eggs.This paper concluded the following parts:(1) The defining of top-pouring machine for sealing paraffin on preserved eggs. Take the current coating methods of eggs into the coating experiment, so that this research could determine the optimal method, pouring paraffin from the top, comparing the results of the experiment.(2) According the requirement of the top-pouring machine for sealing paraffin on preserved eggs, this research calculated the amount of paraffin needed, the power of the pump and the electric motor, the ration of the transmission system, the size of the mechanical systems movement, besides these, this research also studies the connection of drench paraffin mouth and paraffin amount, the temperature of the liquid paraffin, and the speed of the conveyor belt, and finally it comes out how all factors above affect the thickness of the paraffin coat.(3) In order to realize the best sealing paraffin, this research designed the critical components of the machine.(4) We can control the the top-pouring machine by using the singlechip AT89S52. Considering the operating procedure, this research designed the circuits and programs, so as to control the temperature, electric motor and the pump motor, therefore it's feasible to have a key switch to start or stop the machine according to the working process(5) This research also studied the melting paraffin box by ANSYS 12.0, defining the isotherm during the paraffin heating, and in the end this research proposed the improvement of the reasonable melting paraffin box's heating system. (6) The research confirmed the impact of the liquid paraffin temperature and the preserved eggs conveyor speed on amount of sealing paraffin, quality of sealing paraffin and percentage of damaged, the efficiency and energy consumption of the top-pouring machine.(7) After analyzing the experiment results, this research defines the optimal circumstance and technical economical index of top-pouring machine for sealing paraffin on preserved eggs.