Study On Structure And Control System Of High Melting Point Glass Molding Machine

LED lighting system has become the first choice for new lighting systems,employed in the digital appliances,automotive lighting,industrial lighting and other fields because of its high efficiency,energy saving,environmental protection and other advantages.One of the core technologies of the LED lighting system is light distribution in which the core component is LED lens.At present,bigger volume LED optical lenses are mostly aspherical lenses and profiled curved lenses.Traditional aspheric lens processing technology,such as grinding and polishing,has defects of low processing efficiency,high production cost,unstable processing quality and high technical requirements for workers.By contrast,optical glass molding technology is suitable for large quantities of mechanized production of the LED lens for its simple processing technic,high production efficiency as well as stable quality.Due to high price and short service life at high temperature,low melting glass is not suitable for the production and application for large diameter LED lenses.Owing to cheap property,good molding quality and high temperature stability,high melting point glass is preferred for manufacturing of the large diameter LED lens.Therefore,development of high melting point glass molding machine is of great significance for large-scale application of LED lighting system.In this paper,designing of overall structure of the high melting point glass molding machine,researching on composite heating system,position simulation of the posture adjustment mechanism as well as studying on control system were carried out.The detailed research contents are as follows:(1)The overall structure and control system of the high melting point glass molding machine was designed.Composite heating system,sealing system,pressure mechanism and platform positioning adjustment mechanism was studied.(2)The composite heating system was studied.Power of the composite heating system composed by electromagnetic induction heating and molybdenum disilicide(MoSi2)heating was calculated.Finite element simulation of the composite heating system was carried out.Compared with single heating system,problems of uneven heating of the mold,low heating efficiency and long heating time were addressed effectively by the composite heating system.(3)The cylinder pressurization system was studied.The pneumatic circuit of the cylinder pressurized system was designed.Besides,the structural calculation and thermodynamic coupling analysis of the cylinder pressurizing mechanism were carried out.The results showed that the pressurizing mechanism met the design requirements.(4)Basic structure of the positioning adjustment mechanism of the lower pressure plate was designed.Range of the position adjustment was calculated and simulated on the basis of analysis of the kinematic equation,which effectively settled the upper and lower mold deflection problem caused by the processing,installing error and uneven force.(5)Overall control circuit by using the controller area network for the on-line real-time transmission of sensor and control information was established and the host computer software for real-time monitoring and processing of each control parameters was applied.