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(2015届)本科毕业设计(论文)资料学院(部):机械工程学院专业:机械工程及自动化学生姓名:余双班级:机工1102学号11405700707指导教师姓名:林益平职称教授最终评定成绩:湖南工业大学教务处2015届本科毕业设计(论文)资料第一部分本科毕业设计(论文)(2015届)本科毕业设计(论文)2015年5月学院(部):机械工程学院专业:机械工程及自动化学生姓名:余双班级:机工1102学号11405700707指导教师姓名:林益平职称教授最终评定成绩湖南工业大学本科毕业论文(设计)诚信声明本人郑重声明:所呈交的毕业论文(设计),题目《方便袋封口机的设计》是本人在指导教师的指导下,进行研究工作所取得的成果。对本文的研究作出重要贡献的个人和集体,均已在文章以明确方式注明。除此之外,本论文(设计)不包含任何其他个人或集体已经发表或撰写过的作品成果。本人完全意识到本声明应承担的责任。作者签名:日期:年月日湖南工业大学本科毕业设计(论文)I摘要本文要求设计一个连续式的方便袋封口机,本文是以相似类型的封口机作为参考,同时讨论了各种各样的封口机的封口方法,同时分析各种封口方式的优缺点,最后重点对封口机构和曲柄滑块机构进行研究和设计。方便袋封口机主要由封口机构、供料机构、曲柄滑块机构和切断机构组成。原料被安放在料辊上,经过托辊引导到封口机构,由封口机构对原料完成封口的工作,最后通过切断装置的切断,使原料分离为完整独立的方便袋个体。这种封口方法在技术上已经是比较成熟的一种了,它已经被广泛应用于实际的生产中。这次设计的方便袋封口机,可以根据选择的原料的具体规格,手动调节宽度,自动调节制袋速度。一般适合于单机作业。本文对方便袋封口机的工作原理、结构等做了适当的分析、说明和优化,并且在现有方便袋封口机的基础上进行一系列的设计,设计出一套可行的方案同时对封口机各部分装置和机构的设计选择,以及封口机传动系统的参数进行了相关的设计计算,最后使用绘图软件画出方便袋封口机主要的工程图。关键词:封口机,封口机构,切断机构,曲柄滑块机构湖南工业大学本科毕业设计(论文)IIABSTRACTThispaperweneeddesignacontinuousconvenientbagsealingmachine..thispaperhasusedasimilarsealingmachineasareference,anddiscussesthesealingmethodformanysealingmachine,anddistinguishthegoodsealingmethodfromthevarioussealingmethods,andatlastfocusontheresearchanddesignofthehotsealingmechanismandcrankslidermechanism.Thismachineismainlymadeupofthehorizontalhotsealingmechanismwhichsealtheborderofthebags,thefeedingmechanismwhichsupplythematerials、thecrankslidermechanismandthecuttingmechanism.Sealingmaterialsareputintherollbarrel,throughthecarrierrollerguidetosealingmechanism,thenthecuttingmechanismcutthematerials,sothattheseparationforthecompleteconvenientbagofindividual.Thiskindofschemeisappliedtoproducinginrealityextensively,isaquiteripeonetechnically.Thebagsealingmachinedesignedthistime,canregulatewidthbyhand,accordingtothesealingmaterialsstandard,whichusuallyusedinunithomework.Thispapermakesanalysisanddescriptionoftheworkingprinciple,sealingmachinestructure,andmachinedesignbasedontheexistingsealing,designedforasetoffeasiblesolutionsandcalculatestheparameterofthetransmissionsystem,atlast,usingthedraftingsoftwaretodrawthehomologousengineeringdrawings.Keywords:sealingmachine,sealingmechanism,cuttingmechanism,crankslidermechanism湖南工业大学本科毕业设计(论文)III目录第1章绪论·······················11.1热压式封口机的概述····················11.2热压式封口机的发展现状及趋势···············11.3原料的性能························2第2章总体方案的设计··················32.1设计任务·························32.2方便袋封口机的工艺分析··················32.3传动方案的分析······················32.4总体方案的确定······················4第3章电动机的选择···················63.1辊压引膜电机选择·····················63.2封口机构电机选择·····················8第4章V带传动的设计·················104.1一级V带设计·······················104.2二级V带设计·······················13第5章同步带传动设计·················175.1同步带概述···········································································175.2同步带设计···········································································17第6章键连接设计···················216.1平键连接的设计····································································216.2键联接强度校核计算······························································21第7章曲柄滑块机构的设计···············227.1选用曲柄滑块机构的原因························································227.2曲柄滑块机构的设计······························································227.3切断机构曲柄滑块机构的设计··················································257.4热封与切断装置····································································277.5曲柄滑块机构结构·································································28第8章热封装置的设计·················308.1热封方法的选择····································································308.2热封装置的设计····································································30第9章辊压引膜装置设计················32湖南工业大学本科毕业设计(论文)IV第10章其他结构设计·················3310.1送料辊结构设计···································································3310.2料辊结构设计······································································33结论·························35参考文献························36致谢·························37湖南工业大学本科毕业设计(论文)1第1章绪论1.1热压式封口机的概述塑料袋封口机广泛应用于工厂、商店、零售部门,服务性行业及科研军工部门等各行业,在我国的发展脚步也是非常稳健。在目前的市场中,塑料袋封口机已经得到了广泛的使用,各大企业对于塑料袋封口机的技术都是非常认可的,因此一直以来,塑料袋封口机都是很受企业喜爱的。所以纵使机械市场的包装设备再多,塑料袋封口机依然是很靓丽的,一样可以吸引很多企业的眼球[1]。本次设计的热压式封口机是对HDPE、LDPE筒膜材料进行横向的封口,具体为往复移动式横封器。1.2热压式封口机的发展现状及趋势目前国外封口机在技术上已比较成熟。产品水平比较先进,年产值比较大的国家有:西德、日本、美国、意大利等。国外八十年代封口机的先进水平的标志是:(1)工作高速化、结构大型化(2)结构模块化(3)现代先进技术的应用在产品性能、封口效果、结构情况等方面,我国已生产的封口机与国外同类型产品相比,具有如下差距:(1)产品的性能不太稳定,可靠性需要提高。(2)工作速度低。(3)封口效果差。(4)对现代先进技术的应用较少。(5)结构形式单一,产品品种少。综上所述,国外在生产封口机方面开始较早,并已形成了一些能在一些方面代表世界水平的专业性公司。而我国在这方面起步较晚,近几年虽取得了进步,但与国外先进水平相比尚有较大的差距,有很多机器还需不断地改进,需提高现有产品的质量,需加强行业管理。湖南工业大学本科毕业设计(论文)21.3原料的性能高密度聚乙烯,英文名称为“HighDensityPolyethylene”,简称为“HDPE”。HDPE是一种由乙烯共聚生成结晶度高、非极性的热塑性树脂。原态HDPE的外表呈乳白色,在微薄截面呈一定程度的半透明状。其具有优良的耐化学品的特性,它能抗强氧化剂(浓硝酸)、酸碱盐以及有机溶剂(四氯化碳)的腐蚀和溶解。该聚合物不吸湿并具有好的防水蒸汽性,可用于防潮防渗用途。HDPE的软化点为125-135℃由于聚乙烯(PE)具有易合成、加工、无毒等性能,低密度聚乙烯薄膜在包装材料中应用比较普遍[2]。低密度聚乙烯,英文名称为“Lowdensitypolyethylene”,简称为“LDPE”。与高密度聚乙烯相比,其结晶度是55%~65%,软化点与高密度聚乙烯相比是比较低的,只有90~100℃。有良好的柔软性、延伸性、透明性、耐寒性和加工性;其化学稳定性较好,可耐酸、碱和盐类水溶液;有良好的电绝缘性和透气性;吸水性低;易燃烧。性质较柔软,具有良好的延伸性、电绝缘性、化
本文标题:方便袋封口机的设计-毕业设计说明书
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