V型橡胶弹簧双腔自动脱模模具的设计

通过设计以托模板-四组弯销联合驱动机构为核心的自动脱模硫化模具,实现了V型橡胶弹簧的自动脱模生产过程。结果表明,该型模具可靠性好,自动开模过程顺畅,双腔模结构提高了生产效率。     

高速动车组橡胶缓冲器自动模具设计

通过设计应用限位螺钉和两层顺序脱模机构,完成了生产某高速动车组橡胶缓冲器的哈夫模自动打开及上下端型面自动脱模操作,且为后续取出清胶板提供了行程空间,实现了该缓冲器产品的全自动化脱模过程.结果 表明,该模具可靠性好,自动开模过程流畅,多腔模具结构大幅度提高了生产效率.     

球铰制品吊挂式模块化自动脱模硫化模具的设计

通过弹簧预压、侧滑U形斜块压锁、模具拉杆、挂杆与T形拉杆等开合模联动机构设计,从传统硫化模具的注胶筒和下模中分别分解出上镶块和下镶块,并与两瓣模组合成与产品结构相关联的模块化子模结构,开发出了球铰制品新型吊挂式模块化自动脱模硫化模具。实际生产证明,该型模具实现了子母模设计思路,具有快速开发和硫化快速换型功能,实现了自动脱模操作,改善了生产操作与模具使用工况,提升了生产效率与产品质量,经济效益显著。     

汽车橡胶垫圈模具自动脱模机构的设计

通过设计托板—倒锥斜导块组合机构,实现了内孔强制脱模、外圈自动侧抽芯的橡胶模具自动脱模机构。实践表明,该模具结构稳定,自动脱模工艺顺利,一模多腔的布局大幅提升了生产效率。     

汽车门内饰板模内热切机构热流道注塑模具设计

汽车大型塑件生产中,塑件的脱模设计是模具设计成败的关键因素,浇口的自动切除是影响塑件生产效率的另一关键因素。在分析成型对象塑件结构形状及成型方案的基础上,提出了一种斜导柱增强复合斜顶机构及浇口模内自动热切除机构设计。所设计的模具为一模两腔两板式家族模具结构,模具采用2个斜导柱增强复合斜顶机构、2个斜导柱滑块机构、14个滑动座圆杆斜顶机构、36根顶针和4个推管实施脱模;采用2个模内热切机构来对冷浇口进行模内自动热切除。生产实践证明,该模具设计巧妙,结构新颖,成型的塑件获得了良好的注塑效果,大幅提升了模具生产效率,极具设计参考价值。     

手机后盖内螺纹精密成型模抽芯机构设计北大核心

结合产品的注塑成型需要,设计了其一模一腔的点浇口三板模注塑模具。为实现模具的自动化注塑生产,模具的脱模机构包括4个动模侧斜导柱滑块抽芯机构、2个前模弯销滑块抽芯机构、1个齿条驱动螺纹抽芯机构、1个斜顶杆顶出脱模机构及3个推管推出脱模机构。机构中的齿条驱动螺纹抽芯机构,利用模板的开模动力来驱动螺纹型芯对产品的螺纹特征进行成型和脱模,简化了模具结构,降低了模具制造成本。模具整体结构布局合理,机构简单可靠,具有较好的工程设计参考价值。     

手机后盖内螺纹精密成型模抽芯机构设计

结合产品的注塑成型需要,设计了其一模一腔的点浇口三板模注塑模具。为实现模具的自动化注塑生产,模具的脱模机构包括4个动模侧斜导柱滑块抽芯机构、2个前模弯销滑块抽芯机构、1个齿条驱动螺纹抽芯机构、1个斜顶杆顶出脱模机构及3个推管推出脱模机构。机构中的齿条驱动螺纹抽芯机构,利用模板的开模动力来驱动螺纹型芯对产品的螺纹特征进行成型和脱模,简化了模具结构,降低了模具制造成本。模具整体结构布局合理,机构简单可靠,具有较好的工程设计参考价值。     

复杂锥度体塑件径向多侧抽芯注塑模设计

根据复杂分离器带锥度体塑件模具生产的难点,设计了一模一腔的点浇口注塑模具;针对12个不规则锥度孔的脱模需要,设计了2种脱模机构,一种采用平行一体式联动抽芯机构,将锥度孔分组进行抽芯脱模,一种采用圆周周向式整体抽芯机构进行抽芯脱模;针对下部凹环处的脱模,设计了模板驱动式凹环哈弗滑块抽芯机构;为保证所设计脱模机构的动作功能实现,模具结构采用4次分型简化型三板模结构以保证脱模机构及顶出机构的依次顺序动作;实践证明,模具结构新颖,有较好的创新性和实用性,可为同类复杂塑件的注塑模设计提供参考。     

充电器上盖斜顶结构注塑模具设计

分析了充电器上盖成型和抽芯脱模情况,介绍了其模具基本结构及模具的工作过程。模具采用一模一腔和进浇口自动脱模的设计,抽芯部分全部采用不同角度的斜顶杆完成,并在模镶块作出对应的角度,有效保证斜顶杆顶回运动,模具脱模顺利。模具经生产实践证明,充电器上盖模具结构设计符合生产要求,操作方便,塑件能达到技术要求。     

L10面条机主体盖前模多重脱模机构及其注塑模具设计

针对L10面条机主体盖外形不规则,型腔侧、型芯侧多种形状特征需不同脱模方式的特点,设计了1模1腔的模具结构,针对产品不同部位脱模情况设计了不同的脱模机构,型腔侧采用隧道滑块抽芯脱模机构进行抽芯,型芯侧采用T型槽滑块内抽芯脱模机构进行抽芯,并结合模具布局的特点,简化了模具结构,通过设置浮动模板的方式,巧妙地将型腔侧模隧道式滑块抽芯脱模机构与型芯侧T型槽滑块内抽芯脱模机构有机结合联动,同步完成产品所有的侧抽芯脱模动作,实现了产品的自动化注塑生产;模具结构新颖,为同类产品的注塑模具设计提供了有益参考。     

胶片冷却机的三种机械手

介绍了卧式、立式及新型三种胶片冷却机机械手的结构组成和控制原理,介绍了三种机械中具体的动作顺序流程.分析了三种机械手在结构、控制和工作特点等方面的优缺点.     

基于Visual FoxPro的隧道窑结构设计软件的开发

该系统是基于隧道窑结构设计开发的可视化应用程序系统.系统可实现隧道窑设计中主要设备选型以及燃烧、散热、热平衡的参数计算工作.经检验,软件界面友好、操作方便、可靠、计算速度快,可提高设计人员的工作效率.     

高效、高质、省料的橡胶成型设备--橡胶精密预成型机

在橡胶制品的生产工艺过程中,半成品的准备是一个很重要的工序,对制品的质量和生产效率有很大的影响。传统的生产工艺中,半成品的准备工作费时又费力,可用压出机挤出片状胶料、或是挤出胶绳再切成圆柱形,也可用炼胶机出片成胶条或冲切、剪切成所需的形状。然后由人工加工     

Mechanical properties,thermal stability,gas permeability,and phase morphology in natural rubber/bromobutyl rubber blends

This work was performed to relate the morphological features and all important properties of the natural rubber (NR) and bromobutyl rubber (BIIR) blends containing hybrid fillers. The BIIR content was varied from 0 to 100 wt%. It is found that tensile and tear strength, hardness as well as resilience of blends tend to decrease with increasing BIIR loading. Regarding the blend morphology, phase inversion is observed when BIIR loading is >50 wt % where BIIR becomes a continuous phase. This result coincides with the marked improvement of thermal stability of the blends determined using thermogravimetric analysis and heat ageing method. Interestingly, that, the gas permeability of blends markedly reduces with an increase in BIIR loading up to 40 wt % when the relatively large elongated particles of BIIR dispersed phase is formed. The results indicate that the relatively large connected structure of the dispersed BIIR can act effectively as a gas barrier. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

自粘型化纤胎橡胶改性沥青复合防水卷材的研制及应用

自粘型化纤胎橡胶改性复合防水卷材具有性能好、造价低廉、施工简便、不污染环境等优点,颇受设计、建设施工单位的欢迎,是代替传统的三毡四油沥青防水材料的理想产品,值得推广。本文对这种新型防水卷材从改性机理、结构模式、材料的选用、工艺流程和技术指标等方面进行了探讨,并列举了应用实例。     

XPG-800型悬挂式胶片冷却机的研制

介绍最新开发的XPG-800型悬挂式胶片冷却机的设计特点、工作原理、主要技术参数、结构特征，阐述了本机组主要技术改进。     

Stereocomplex Crystallization Induced Significant Improvement in Transparency and Stiffness–Toughness Performance of Core-Shell Rubber Nanoparticles Toughened Poly(l-lactide) Blends

Toughening modification of poly(l -lactide) (PLLA) with rubber particles is often realized at the cost of transparency, mechanical strength, and modulus because high rubber loadings are generally required for toughening. In this work, a promising strategy to simultaneously improve the transparency and stiffness–toughness performance of poly(butyl acrylate)-poly(methyl methacrylate) (BAMMA) core-shell rubber nanoparticles toughened PLLA blends by utilizing the stereocomplex (SC) crystallization between PLLA and poly(d -lactide) (PDLA) is devised. The results reveal that the construction of SC crystallites in PLLA matrix via melt-mixing PLLA/BAMMA blends with PDLA can prevent BAMMA nanoparticles from aggregation and promote them to form network-like structure at lower contents. As a result, not only higher toughening efficiency with less rubber contents but also superior transparency is achieved in the PLLA/PDLA/BAMMA blends as compared with the PLLA/BAMMA ones where large aggregated BAMMA clusters are formed. Moreover, the outstanding reinforcement of SC crystallites network for PLLA can impart an enhanced tensile strength and modulus to PLLA/PDLA/BAMMA blends, thus improving the stiffness–toughness performance of PLLA/PDLA/BAMMA blends to a higher degree. This work demonstrates that SC crystallization is a promising solution to solve the contradiction between transparency and mechanical properties and then obtain superior comprehensive performances in rubber toughened PLLA blends.     

一次性真空采血器橡胶塞的研制

简述一次性真空采血器的结构和工作原理。介绍为其配套的橡胶塞结构设计、配方设计原则及橡胶塞的物理化学性能。     

The solvent-free modification of butyl rubber in the medium of NaH

A novel improved butyl rubber (PMIIR) was prepared in a solvent free process, using sodium hydride (NaH) as activating agent and maleic anhydride (MAH) as modifier by processing modification technology in a conventional polymer processing equipment of an internal mixer. The structure of products was characterized by ¹H NMR and FT-IR. In this process, polar sodium carboxylate functional group and unsaturated carbon–carbon double bonds were successfully introduced onto the chains of IIR on one step. The reaction mechanism was investigated in detail. It was found that the functionalization experienced two modified mechanisms: addition and substitution modified mechanisms. The reaction efficiency and content of MAH were evaluated. Polymer isolation and purification operations were reduced out due to the result of solvent free. Curing and mechanical properties of products were investigated. It was found that PMIIR has greatly increased curing rate due to the incorporation of polar group and carbon–carbon double bond.     

橡胶衬套双骨架同步加料器的设计

介绍了橡胶衬套双骨架同步加料器的结构特点及工作过程，使用该加料器在提高生产效率的同时还能有效保证产品质量，具有较好的应用价值。