Roll-to-roll薄膜烫装拉链机封烫机构设计与优化

Design and optimization of zipper melting and assembling mechanism for Roll-to-roll film assembling zipper equipment

针对传统薄膜烫装拉链机制成的预制袋只适用于人工包装的问题,设计一种可再封拉链自动封烫装置。设计曲柄摇杆与双曲柄滑块的组合机构作为封烫机构主传动,弹簧缓冲烫压机构作为执行机构,运用动力学分析,确定机构参数;为减小薄膜融烫张力,增加融烫时间,设计最优曲柄摇杆机构极限角ψ,采用粒子群算法优化曲柄摇杆机构参数,并在Adams中验证机构设计准确性。优化后,封烫机构主传动总行程减小22.45%,间接减小薄膜融烫张力;融烫时间增加12.75%。由Adams分析可知,单根弹簧受力逐渐增加到最大值,起到缓冲作用,同时弹簧最大振幅仅为0.3 mm,满足设计要求。研究结果表明在封烫温度、压力一定时,封烫质量明显提升。研究为自动封烫装置在包装领域的开发应用提供理论支持。

In view of the problem that the prefabricated bag made by the traditional film melting and assembling zipper mechanism is only suitable for manual packaging,an automatic hot melt sealing device for resealable zipper was designed.A combined mechanism composed of a crank-rocker mechanism and a double-crank slider mechanism was designed as the main transmission mechanism,and a hot pressing mechanism with spring buffer was designed as the actuating mechanism.Dynamic theoretical analysis was carried out to determine the mechanism parameters.In order to reduce the hot melting tension and increase the melting time,an optimal limit angleψof crank-rocker mechanism was designed.The parameters of the crank-rocker mechanism were optimized by particle swarm optimization algorithm,and the accuracy of the design was verified by Adams.After optimization,the total stroke of the main transmission of hot melt sealing mechanism was reduced by 22.45%,which indirectly reduces the film melting tension.The zipper melting time was increased by 12.75%.Adams analysis show that the force of a single spring gradually increases to the maximum to play a cushioning role,and the maximum amplitude of the spring is only 0.3 mm,meeting the design requirements.The research results show that when the hot melt sealing temperature and pressure are constant,the hot melt sealing quality is significantly improved.The study provides theoretical support for the development and application of automatic hot melt sealing device in the packaging field.