新型点胶阀的设计  

Design of a New Dispensing Valve

作　　者：林和德[1] 董楸煌 温明生 

机构地区：[1]漳州职业技术学院,福建漳州363000 [2]福建农林大学机电工程学院,福建福州350002 [3]深圳市元硕自动化科技有限公司,广东深圳518000

出　　处：《液压与气动》2017年第6期65-69,共5页Chinese Hydraulics & Pneumatics

基　　金：福建省自然科学基金(2016J05110);漳州职业技术学院科研计划资助项目(ZZY1510)

摘　　要：通过分析和比较几种常用顶针式点胶阀的阀门结构及工作原理,并结合理论计算,指出容易出现气泡或真空包现象的原因是因为点胶阀存在结构原理性缺陷,对阀门结构进行了改进。改变进胶方式,提高进胶速度;增设缓冲气压室,消除点胶阀在工作时容易出现低负压状态,从而避免产生气泡或真空包的问题;通过缓冲气压室的反馈作用,对出胶管咀内胶液产生回吸提拉作用,能达到断胶迅速、彻底、不拉丝的目的,并得到实验验证,具有较好的市场推广应用价值。Based on the analysis and comparison of the structure and working principle of several common thimble- typed dispensing valves, this experimental study attributes the phenomenon of bubbles or vacuum package to the fundamental defect of the dispensing valve by theoretical calculation, and we try to improve the valve structure by changing the input way of the glue to speed it up and increasing the buffer pressure chamber to eliminate the low negative pressure of the dispensing valve at work. It is verified that the feedback effect of the buffer pressure cham- ber can suck back and lift the glue in hose nozzle so as to cut off the glue quickly and thoroughly without any draw- ing.

关 键 词：点胶阀结构 缓冲气压室 空气泡 真空包 

分 类 号：TH137[机械工程—机械制造及自动化]