论文.doc

淋浴喷头支架塑料注射模具设计【11张CAD图纸和说明书】

收藏

压缩包内文档预览:(预览前20页/共49页)
预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图 预览图
编号:10109144    类型:共享资源    大小:2.46MB    格式:RAR    上传时间:2018-05-17 上传人:俊****计 IP属地:江苏
40
积分
关 键 词:
淋浴 喷头 支架 塑料 注射 模具设计 11 十一 cad 图纸 以及 说明书 仿单
资源描述:

摘  要

本文主要介绍了淋浴喷头支架塑料件的注射模设计,其间要参考大量与塑料成型相关的资料和翻阅各种模具设计手册,并通过计算以确定模具的具体模具制造技术迅速发展,已成为现代制造技术的重要组成部分。如模具的CAD/CAM技术,模具的激光快速成型技术,模具的精密成形技术,模具的超精密加工技术。根据成型工艺要求,在原有塑料件的基础上介绍了其注塑成型模具的结构,阐述了模具设计要点及工作过程。首先要从塑料生产工艺上对所要设计的产品进行工艺的分析与计算,然后在分析计算的基础上并参看相关的资料确定成型工艺方案,再在此基础上进入模具总装配图的结构设计。在此基础上对注塑模具的主要零部件的尺寸进行设计与计算,期结构及尺寸,通过不断的计算与修改,并在指导老师的悉心关怀和耐心指导下进行不间断的反复修改,最终独立完成这次毕业设计。其材料为ABS。根据ABS塑料的工艺特性和产品的使用要求,分析了手表盒盒底的结构特点和成型工艺。本设计采用CAD技术进行模具装配图及零件图的绘制。对模具进行了成型零部件、浇注系统、侧向抽芯机构、推出脱模机构及冷却系统的设计分析。最后,完成模具总装图设计及主要零件图的绘制,从而确保模具结构的可靠性、合理性和实用性。

关键词:塑料;模具设计;CAD




shower bracket plastic injecting mold design

 Abstract

This article mainly introduced the shower bracket plastic injection mould design, which to refer to a lot of useful information related to the plastic molding and through all kinds of mold design manual, and through the calculation to determine the specific mold die & mould manufacturing technology rapid development, has become an important part of modern manufacturing technology. Such as mould CAD/CAM technology, die of laser rapid prototyping technology, mold's precision forming technology and die of super precision machining technology. According to the forming process requirement, on the basis of the original plastic its injection molding mold structure is introduced, this paper expounds the key points of die design and working process. Must first from the plastic on the production process to design products for process analysis and calculation, and then on the basis of the analysis and calculation and see the relevant data to determine the molding process, and on this basis into the mold structure design of general assembly drawing. On the basis of the size of the main parts of injection mold design and calculation, phase structure and the size, through continuous calculation and modification, and in guiding the teacher's careful care under the guidance and patience to constantly modify repeatedly, finally completed the graduation design independently. Its material is ABS. According to process characteristics and product requirements of the ABS plastic, watches boxes were analyzed with the structure characteristics and molding process. This design using CAD technology to drawing die assembly drawing and part drawing. Has carried on the molding parts to mould the lateral core-pulling mechanism, gating system, and launched demoulding mechanism and cooling system design and analysis. Finally, complete the mold assembly design and main parts graph mapping, to ensure the reliability, rationality and practicability of the mold structure. 


Key Words: Plastic; Mould design; CAD 



主 要 符 号 表


T——成形周期

K——注射机最大注射量的利用系数,一般取0.8

M——注射机的额定塑化量(g/h或cm3/h)

M——浇注系统所需塑料质量和体积(g或cm3)

M——单个制品的质量和体积(g或cm3)

F——注射机的额定锁模力(N)

A——单个制品在模具分型面上的投影面积(mm2)

A——浇注系统在模具分型面上的投影面积(mm2)

p——塑料熔体在模腔内的平均压力(MPa),通常模腔内压力

S——注射机最大开模行程(mm)

H——推出距离(脱模距离)(mm)

H——包括浇注系统在内的制品高度(mm)

Q——抽拔力(N)

A——侧型芯被包紧的截面周长(cm)

h——成型部分深度(cm)

q——单位面积积压力

μ——摩擦系数

a——脱模斜度



目  录

1 概论 1

1.1绪论 1

1.2国内、外塑料模具发展现状 1

1.3塑料模具发展走势 2

2 塑件结构和材料分析 4

  2.1塑件结构分析 4

  2.2塑件材料的分析 6

  2.3塑件结构的工艺分析 6

3 成型零件结构设计 7

  3.1分型面的设计 7

    3.1.1分型面的基本形式 7

    3.1.2分型面选择的基本原则 7

    3.1.3分型面的确定 7

  3.2型腔布局 9

    3.2.1型腔数目的确定 9

    3.2.2型腔分布 9

  3.3成型塑件的结构设计 9

  3.4成型零件工作尺寸的计算 10

    3.4.1模具成型零件的工作尺寸计算 10

    3.4.2型腔壁厚的计算 10

4 注射机的初选择 11

4.1 塑件体积的计算 11

4.2计算塑件的质量 11

4.3按注射机的最大注射量与初确定型腔数目 11

4.4选择注射机及注射机的主要参数 12

    4.4.1选择注射机 12

    4.4.2注射机主要参数 12

  4.5 注射基本压力 13

  4.6 锁模力的计算 13

  4.7模具厚度与开模行程 14

4.7.1模具厚度 14

4.7.2开模行程 14

5 浇注系统的设计 15

  5.1浇注系统的组成 15

  5.2主流道的设计 15

  5.3分浇道的设计 16

  5.4浇口的设计 17

  5.5冷料穴的设计 18

6 分型与抽芯机构的设计 19

6.1斜导柱的结构尺寸设计 19

6.2斜导柱长度计算 19

6.3抽芯力 20

6.4型腔和型芯工作尺寸计算 20

6.4.1凹模的径向尺寸计算 21

6.4.2凹模的深度尺寸计算公式 22

6.4.3凸模型芯直径的计算 23

6.4.4凸模型芯高度的计算 24

7 厚度计算 26

8 导向机构的设计 27

  8.1导向零件的作用 27

  8.2导柱、导套的设计 27

    8.2.1导柱的设计 28

    8.2.2 导套的设计 28

9 推出机构的设计 29

  9.1采用顶杆的形式及其固定方法 29

  9.2 推件力的计算 30

  9.3 推杆的设计 30

10 温度调节系统的设计 32

  10.1冷却水回路布置的基本原则 32

  10.2 冷却系统的作用 32

  10.3冷却时间的计算 33

  10.4冷却水道热传面积 33

    10.4.1 冷却水道热传面积 33

    10.4.2冷却水的体积流量 34

    10.4.3冷却水道热传面积 34

11 模具的校核 35

  11.1注塑工艺参数的校核 35

    11.1.1 最大注塑量的校核 35

    11.1.2注射压力的校核 35

    11.1.3锁模力的校核 35

  11.2模具安装尺寸的校核 35

    11.2.1喷嘴尺寸的校核 35

    11.2.2模具厚度校核 36

    11.2.3模具外形尺寸校核 36

  11.3开模行程的校核 36

12 确定装配图 37

13 结论 38

  13.1总结 38

  13.2体会 38

参考文献 39

致  谢 40

毕业设计(论文)独创性 41

毕业设计(论文)知识产权声明 42



1概论

1.1绪论

塑料模具的设计和制造水平反映了机械设计和加工的水平,模具的设计已应用了当代先进的设计手段。CAD、CAM、CAE的逐渐广泛应用,使模具的设计效率大大提高,快速成型技术的应用以及现代加工技术的使用如高精度加工中心、特种加工技术的大量使用是模具的制造精度越来越高,加工周期越来越短。各行各业对模具的需求量与日俱增,我国的模具行业蒸蒸日上,正需要大量的模具设计与制造的技术人才。本课题为中等以上难度的塑料模具设计,从模具的结构设计,各种参数的设计与计算,材料的选择与处理,零件的加工工艺方案的制定,三维造型等均得到锻炼。


内容简介:
基于互联网的注塑模具智能化设计系统C.K. Moka,*, K.S. China, Hongbo Lana,b摘要:互联网和信息技术在近几年的快速增长为支持和促进不同的地理分布式企业产品的开发合作提供了一种解决方案。这是一个帮助注塑模具发展的有效可行的工具,是一个可以通过互联网实现模具设计产品开发的系统的模块之一。本文提出了一种原型,基于互联网的注塑模具智能化设计系统。该系统的结构包括一个互动 KB 模具设计,在互联网环境下的嵌入式系统。一个支持 Java 功能与人工智能技术致力于开发这样一个网络互动的 CAD 系统。在这个系统中,计算模块,知识库模块,生成模具功能的图形模块集成在一个以 CAD 为基础的框架中。该系统的知识基础是设计者通过模具设计互动,运用他们的智慧和经验纳入到总的模具设计当中。该方法既加快的设计速度,又促进了设计的标准化,从而提高了模具制造的速度。本文以一个实际案例研究,提出了以互联网业务为基础的模具设计系统。关键词:互联网;以知识为基础的专家系统;注塑模具设计;协作 1.前言塑料是现今最通用的材料之一,用它做成的产品广泛应用于世界各地。由于它能够生产区形状复杂、尺寸精确且生产周期短的部件,因此,如今,注射成型已经成为生产塑件最重要的方法。但是,由于市场的全球化、产品的生命周期短、产品的多样性、产品的质量要求高等等,目前,塑料行业的压力很大。为了满足这些要求,采用各种先进技术,包括信息技术和互联网技术、CAD / CAE / CAM 集成技术、并行工程、人工智能等从而有效地帮助发展注塑成型产品是非常重要的。在注射成型中,模具的设计是产品的质量和有效处理的关键。在大多数情况下、模具的质量决定整个过程完成情况。注塑模具设计中,设计模具组件结构和功能方面涉及了广泛的经验知识(启发式知识) 。如今,模具设计所面临的是最后期限的压力增加,涉及本身主要是基于设计者的经验。模具设计师必须具备全面丰富的经验,因为详细的决定要求了解各种参数之间的互动。不幸的是,现在急需这种有经验的设计人员。因此,CAD 可以帮助设计模具设计过程中的各项任务,在模具制造行业是非常重要的生产力。在全球制造业的发展很大程度上受互联网、信息技术和全球市场的支持。如今,人们通常看到的设计、制造以及产品的最终组装式在世界不同地点的公司完成的。有关需要共享他们在产品开发过程中的专长和经验的各方,互联网和信息技术的发展可以为其提供方便,以支持和促进分散在不同地方的企业共同开发产品。开发一个基于互联网的智能模具设计系统的模块,可以有效地帮助从事住注塑模具方面的中小型企业,以满足竞争激烈的全球市场。本文介绍了一种基于互联网的智能模具设计系统利用互联网技术和知识的方法。该系统可缩短注塑模具的设计周期,可以有效地帮助中小型企业注塑模具工程的设计和开发,以缓解市场竞争的巨大压力。该篇文章在第二节给出了注塑模具设计的简要介绍;在第三节介绍了在模具设计及其相关领域的早期研究工作;第四节介绍了以互联网的体系结构为基础的模具设计系统;第五节阐述了模具设计系统以知识为基础的部分;第六节讨论了该系统的发展前景;第七节以一个实例分析了设计的情况;第八节进行了总结。2.注塑模具设计注射的一个基本特征是模具型腔的数量和布局、原料的冷却系统、注射系统和模具结构。图 1 表示了模具设计的一般程序,从图 1 我们可以看出如何确定相互关联的条件、边界和次要条件必须满足的主要职能。一个模具项目的开始往往是出于对经济情况的考虑,即有多少地方可以而且应该制作一个,以满足交货日期和其他要求。其次是对型腔的设计,这可能直接关系到注射和以后的操作,之后减小连接之间的摩擦和提高连接零件的质量(数量、位置) 。进料系统可以荣华原料,从主流道和分流到进入每个腔内。要成型,必须有一个冷却系统。当模具成型冷却后,就把它从模具的注射系统中取出。模具通常构造叠加几个金属板,形成一个刚体。它的主体用于模具的正常运作,模具工程通常涉及模具基地和标准模具配件的选择。对于复杂的零部件,如幻灯片的一些机制,unscrewing 装置等,也可能参与了整个模具设计结构。3.相关研究有数据表明模具设计的研究活动以及相关领域很早就已经使用了电脑的辅助技术。这些研究活动范围是从模具设计的具体领域,以调查作为一个整体集成系统的模具设计,它们大致可分为三个方面:功能和初步模具设计、自动生成模具及模具设计系统的发展。Hui 和 Tan 提出了在启发式搜索方法的基础上向自动化的方向发展,确定模具设计系统的分型面、型芯等。Huang 等用扎实的建模技术建立了模具板、模具标准组件库。Chen 和 Liu 开发了一种成本模型,其描述与成本因素和产品开发活动以及与产品的几何,以成本效益注塑设计的关系的关系。Fu 等提出了一个注塑模具系统设计的有效方法,它系统地削弱了特征定义、分类、参数,并为削弱的特征识别功能类型提供了确认标准。Chen 等提出了对离别的德克塞尔模型和模糊决策的方向和测定方法。Li JC 提出了一种模拟和优化的注塑模具神经网络方法门参数。Li CL 在注塑模具冷却系统的设计中采用了基于特征的设计方法。Chung 和 Lee 提出了在注塑地理分布式协同设计环境框架的工作,多学科的设计人员可以相互协作。Ma 等描述了一种对塑料注射模具标准件库的设计开发采用面向对象的方法。Low 和 Lee 提供了三维实体模型的初步设计,而不是使用标准化法二维绘图方法。Ashaab 等描述了一个支持塑料工程开发的系统,以方便注塑成型通过共享的注塑模具协同设计的网络信息了解各方面的知识。Li 等使用基于图形的技术,开发了一种启发式搜索算法自动化布局设计注塑模具冷却系统。在最近几年,研究人员已经开始采用以知识为基础的方法来解决注塑和模具设计问题。DTMOULD 是 KBS 的注塑模具成本估算。 EIMPPLAN 考虑到部分设计结合可塑性和解决概念设计发展注塑部件。CADFEED 研制对注塑模具的设计。然而,限于特定的设计领域或简单的部分,和不成熟的和实践足以涵盖一般模具设计。Bozdana 和 Eyercioglu 开发了一个专家系统测定注塑参数热塑性材料。提出了基本结构的 CAD 辅助注射。知识模具设计系统,涵盖了模具设计过程和模具知识管理。从上面的评论可以看出,大多数的先前的研究只考虑某些方面的总设计和其中的一些太理论应用在实际模具设计涉及一个实质性的知识组件对函数和模具的结构,人类的启发式知识和实证的知识类型。知识库系统演示巨大的潜力协助设计师与人互动一个 CAD 系统概念化设计以及最后的工程设计的模具使用工程规则的拇指与广泛的分析手段。此外,还有相对较少的研究工作仍在互联网智能系统的注塑模具设计。Robotics and Computer-Integrated ManufactCityenterprises.development of injection moulds can be realized by developing an Internet-based mould design system as one of the modules of acollaborative product development system. This paper presents a prototype Internet-based intelligent design system for injection moulds.Due to its ability to produce complex-shape plastic partswith good dimensional accuracy and very short cycle times,and Internet technology, CAD/CAE/CAM integrationtechnology, concurrent engineering, artificial intelligence,most cases, quality of mould is responsible for theeconomics of the entire process. Injection mould designmeters. Unfortunately, it is presently impossible to coverthe growing demand for such experienced designers.Therefore, intelligent CAD tools that can assist in theARTICLE IN PRESSvarious tasks of the mould design process are veryimportant to the productivity of the mould-makingindustry.0736-5845/$-see front matter r 2006 Elsevier Ltd. All rights reserved.doi:10.1016/j.rcim.2006.05.003C3Corresponding author. Fax: +85227888423.E-mail address: meckmok.hk (C.K. Mok).injection moulding has become the most important processfor manufacturing plastic parts in the plastic industrytoday. However, the current plastics industry is under greatpressure, due to the globalization of the market, the shortlife cycle of product development, increasing productdiversity, high demand of product quality. To meet suchrequirements, it is very important for this trade to adoptvarious advanced technologies which include informationinvolves extensive empirical knowledge (heuristic knowl-edge) about the structure and functions of the componentsof the mould. Nowadays, mould design faces withincreasing deadline pressures and the design itself ispredominantly based upon experience of the moulddesigner. Mould designers are required to possess thoroughand broad experience, because detailed decisions requirethe knowledge of the interaction among various para-solution together with artificial intelligence techniques is employed to develop such a networked interactive CAD system. In this system,the computational module, the knowledge base module and the graphic module for generating mould features are integrated within aninteractive CAD-based framework. The knowledge base of the system would be accessed by mould designers through interactiveprograms so that their own intelligence and experience could also be incorporated with the total mould design. The approach adoptedboth speeds up the design process and facilitates design standardization which in turn increases the speed of mould manufacture.A practical case study is presented to illustrate the operations of the Internet-based mould design system.r 2006 Elsevier Ltd. All rights reserved.Keywords: Internet; Knowledge-based expert systems; Injection mould design; Collaboration1. IntroductionPlastic, which is one of the most versatile in the modernage, is widely used in many products throughout the world.and so on, to effectively aid the development of injection-moulded product.In injection moulding, the design of a mould is of criticalimportance for product quality and efficient processing. InThe architecture of the system consists of an interactive KB mould design system embedded in an Internet environment. A Java-enabledAn Internet-based intelligent designC.K. Moka,C3, K.S. ChinaDepartment of Manufacturing Engineering and Engineering Management,bSchool of Mechanical Engineering, ShandongReceived 18 October 2005; received in revisedAbstractThe rapid growth of Internet and information technologies in recentproduct developments among different geographically distributeduring 24 (2008) 115system for injection mouldsa, Hongbo Lana,bUniversity of Hong Kong, Tat Chee Avenue, Kowloon, Hong KongUniversity, Jinan 250061, Chinaform 24 April 2006; accepted 5 May 2006years provides a solution to support and facilitate collaborativeAn effective and feasible tool to aid the /locate/rcimARTICLE IN PRESSThe growing trend in global manufacturing is to a largeextent supported by Internet, information technologies andglobal marketing. Nowadays, it is common to see thatdesign, manufacturing and final assembly of a product aremade in companies located in different parts of the world.The various parties concerned would need to share theirexpertise and experiences during the product developmentprocess. The current progress of Internet and informationtechnologies can provide a solution to support andfacilitate collaborative product developments among dif-ferent geographically distributed enterprises. Developingan Internet-based intelligent mould design system asone of the module of a collaborative product develop-ment system can provide an effective and feasible tool toaid the collaborative development of injection moulds inthe small- and medium-sized enterprises to satisfy thestringent requirements of nowadays competitive globalmarket.This paper presents an Internet-based intelligent moulddesign system using Internet technology and knowledge-based approach. The system can shorten the design cycle ofinjection mould and can effectively aid the design anddevelopment works of injection moulds in the small- andmedium-sized enterprises to meet the increasing pressure ofthe current competitive world market. The rest of the paperis organized as follows. Section 2 gives a brief introductionof injection mould design. Section 3 introduces earlierresearch works on mould design and related fields. Thearchitecture of the Internet-based mould design system ispresented in section 4. The knowledge-based part of themould design system is described in section 5. Section 6discusses the development of the system. A practical designcase is demonstrated in section 7. Conclusion is made insection 8.2. Injection mould designThe basic features of an injection mould consist of cavitynumber and layout, feed system, cooling system, ejectionsystem and mould construction. Fig. 1 shows the generalprocedure of mould design 1. It can be seen that howinterrelated the conditions are and which boundary andsecondary conditions have to be met by the main functions.A mould design project normally starts with economicconsiderations, namely the question of how many parts canand should be produced in one mould in one shot in orderto meet the delivery date and other requirements. This isfollowed by consideration of the arrangements of thecavities in the mould frame, which might directly includethoughts on the ease of ejection and subsequently, theconnection between mouldings and runners and partquality (number, position and shape of gates). The feedsystem accommodates the molten plastic material comingfrom the injection nozzle of the moulding machine anddistributes it into each cavity. To remove the heat from theC.K. Mok et al. / Robotics and Computer-In2moulding, it is necessary to provide the mould with acooling system. After the moulding has solidified andcooled down, it has to be removed from the mould by theejection system. Mould is normally constructed by stackingseveral metal plates to form a rigid body. It has to housevarious mould components in correct positions for theproper functioning of the mould. Mould constructionnormally involves the selection of mould bases andstandard mould parts. For complicated plastic parts, someother mechanisms such as slides, unscrewing device, etc.,might also be involved in the whole mould structure.3. Related researchA number of research activities have been carried out onmould design and its related field over the years usingcomputer-aided techniques. These research activities rangefrom studying specific areas of mould design to investigat-ing mould design as a whole integrated system. They canbroadly be classified into three areas: the functional andinitial mould designs; the algorithms to automate mouldgeneration; and system development of mould design.Hui and Tan 2 presented a heuristic search approachbased on sweep operations to develop automated moulddesign systems for determining parting direction, partingline, side core, etc. Huang et al. 3 used solid modellingtechniques to build mould plates and library of standardmould components. Chen and Liu 4 have developed acost model, which depicts the relationships between costfactors and product development activities as well as theirrelationships with product geometry, for cost-effectivenessdesign for injection moulding. Fu et al. 5 proposed anefficient methodology which systematically presents theundercut feature definition, classification, undercut featureparameters, and the recognition criteria of all types ofundercut features for undercut feature recognition in aninjection mould design system. Chen et al. 6 presented amethod for determination of parting direction based ondexel model and fuzzy decision-making. Li JC 7 presenteda neural network approach for modelling and optimizationof injection mould gate parameters. Li CL 8 used afeature-based approach to design the cooling system ofinjection moulds. Chung and Lee 9 proposed a frame-work of collaborative design environment for injectionmoulding in which geographically distributed, multi-disciplinary designers can collaborate with one another.Ma et al. 10 described the development of a standardcomponent library for plastic injection mould design usingan object-oriented approach. Low and Lee 11 introduceda methodology of providing the initial design in 3D solidmodel instead of 2D drawings using the standardizationmethod. Ashaab et al. 12 described a supporting plasticengineering development system to facilitate the sharing ofinjection moulding information and knowledge betweeninterested parties via the Internet for the collaborativedesign of injection mould. Li et al. 13 used graph-basedtechnique and developed a heuristic search algorithm totegrated Manufacturing 24 (2008) 115automate the layout design of plastic injection mouldcooling system.ARTICLE IN PRESSC.K. Mok et al. / Robotics and Computer-InResearchers have started to adopt a knowledge-basedapproach to solve the injection moulding and mould designproblems in recent years. DTMOULD-1 14 is a KBS forof injection moulds cost estimation. EIMPPLAN-1 15incorporated mouldability considerations into part designsand addressed the conceptual design development ofinjection-moulded parts. CADFEED 16 was developedfor injection mould design. They are, however, limited tospecific design areas or simple parts, and are not matureand practical enough to cover general mould design.Fig. 1. The general proceduretegrated Manufacturing 24 (2008) 115 3Bozdana and Eyercioglu 17 developed an expert systemfor the determination of injection moulding parameters ofthermoplastic materials. Chan et al. 18 presented the basicstructure of a CAD knowledge-based assisted injectionmould design system which covers both the mould designprocess and mould knowledge management.From the above review it can be seen that most of theprevious work consider only certain aspects of the totaldesign and some of them are too theoretical to be appliedfor practical mould design which involves a substantialof mould design 1.practical knowledge component about functions andstructure of a mould, human heuristic knowledge andempirical type of knowledge. The KB system has demon-strated great potential to assist the designer to interact witha CAD system for conceptualized design as well as the finalengineering design of a mould by using engineering rules ofthumb with extensive analytical means. In addition, there isstill relatively few research works on Internet-basedintelligent system for injection mould design.4. Architecture of the Internet-based mould design system4.1. OverviewAt the present time, most CAD systems provide only thegeometric modelling functions which facilitate the draftingoperations of mould design, and do not provide moulddesigners with necessary knowledge to develop good moulddesigns. Conventional computer-aided engineeringpackages are usually good at data processing for informa-tion-intensive problems or at number manipulation forformulation-intensive problems. The former comprehendsthe computer-aided drafting and graphics, and datareduction and transformation; while the latter involvesformulation-intensive knowledge. Therefore, conventionalcomputer-aided design technology is unsuitable for proces-sing heuristic and empirical type of knowledge which iscritical in the mould design problems. In general, the majoradvantage of the KB system for mould design overconventional computer-aided design systems is the explicitrepresentation and manipulation of a body of knowledge,representing the human expertise.An Internet-based mould design system using Internettechnology and knowledge-based approach can provide aneffective and feasible tool to aid the collaborative develop-ment of injection moulds in the small- and medium-sizedenterprises to satisfy the stringent requirements of nowadayscompetitive global market. Moreover, there is a consistentneed to check and update the information to ensure that thedata is accurate and updated as mould manufacturers andstandard components suppliers continually improve andupgrade their equipments and processes. By taking fulladvantage of the fast evolving computer network andinformation technologies, an Internet-based mould designsystem could have the ability to continually update andupgradethe large amount of information related to injectionmould design in a prompt and convenient manner.ARTICLE IN PRESSFeed design System C.K. Mok et al. / Robotics and Computer-Integrated Manufacturing 24 (2008) 1154numerical (or mathematical) modelling and analysis.However, in design problem, especially in mould designwhich involves a substantial practical knowledge compo-nent about functions and structure of a mould, humanheuristic knowledge and empirical type of knowledge areneeded in addition to the information-intensive andInternet User Layer Network Layer Business Logic Layer Data and most of the knobs, buckets and cups arebasically circular in shape. The Opitz system 19 which isthe popular classification system for mechanical parts, hasalso been referred to in developing part of the codingsystem.The code is divided into three sections and has a total of12 digits. The first section which describes the plastic partcontains the first four digits. The second section whichdescribes the relation between the part and the mouldincludes the fifth digit. The third section which describesthe mould contains the last seven digits.5.1.1. The first section: part descriptionThis section includes the first four digits. They representthe part class, part external shape, undercut features andmaterial class, respectively. Part class. The first digit distinguishes the part asa circular part or a non-circular part. There are sevennumeric positions for this digit as shown below.(1) Circular part with H/Dp0.5.(2) Circular part with 0.5oH/Do3.(3) Circular part with H/DX3.(4) Variational circular part.(5) Non-circular part with H/Dep0.5.featuresgraphic(6)(7)are stored in terms of rmation has been inputted, the geometthe detailed dimensions of the geometry ofroutine. In the knowledge base of mould featurebase of mould feature geometry through thetegrated Manufacturing 24 (2008) 115Non-circular part with 0.5oH/De o3.Non-circular part with H/DeX3.only.only.and internal undercut.according to its material constant nfor the fourth digit.1234one digitt .describes the relation between the directions of the partsevent digit.ARTICLE IN PRESS115 7appropriate mould for this type of products is inevitably(4) Straight axis, varying cross-section stepped to one end.(5) Straight axis, varying cross-section along the entireheight.(6) Curved axis. Undercut feature. Mould designers are frequentlyencountered with demoulding problems resulting fromundercuts existing on the plastic parts. An undercut can bedefined as any interference occurring between the mouldand the moulded part when the part is knocked out fromthe mould in the withdrawal direction. The design of anmore complicated than for those without any undercuts. In(3)generalextertion.Straight axis, uniform, other than rectangular cross-section.(2) Straight axis, uniform cross-section, with one devia-corner.(1) Straight axis, uniform cross-section, no deviation inClass 67(5) Irregular contoured flat part.(4) Flat part, regularly arched or dished.gular.(3) Rectangular with circular deviation.(1)(2)Rectangular with no deviation in corner.Rectangular with one deviation right angle or trian-5Class(3) More than one non-parallel rotating axes.(2) More than one parallel rotating axes.(1) Curved rotating axis.ClassHaving various diameters along the entire height.4(2)(3)height.Cone, diameter stepped to one end.(1) Smooth, having a uniform diameter along the entireClass 13as follclass the part belongs and the classification rules areows:.whichPart external shape. The second digit depends onHere H is the height of the part measured from theparting line. D is the diameter of a circular part. De is theequivalent diameter of a non-circular part with length Land width W (De O(4LW/p). Parts belong to Class 1and Class 3 are like flat discs and long cylindersrespectively. Parts belonging to Class 5 and Class 7 arelike flats and long prisms, respectively.C.K. Mok et al. / Robotics and Computer-Inundercuts can be classified into three types,nal undercut, internal undercut and internal thread. Runner system. There are four positions for theninth d
温馨提示:
1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
2: 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
3.本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
提示  人人文库网所有资源均是用户自行上传分享,仅供网友学习交流,未经上传用户书面授权,请勿作他用。
关于本文
本文标题:淋浴喷头支架塑料注射模具设计【11张CAD图纸和说明书】
链接地址:https://www.renrendoc.com/p-10109144.html

官方联系方式

2:不支持迅雷下载,请使用浏览器下载   
3:不支持QQ浏览器下载,请用其他浏览器   
4:下载后的文档和图纸-无水印   
5:文档经过压缩,下载后原文更清晰   
关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

网站客服QQ:2881952447     

copyright@ 2020-2025  renrendoc.com 人人文库版权所有   联系电话:400-852-1180

备案号:蜀ICP备2022000484号-2       经营许可证: 川B2-20220663       公网安备川公网安备: 51019002004831号

本站为文档C2C交易模式,即用户上传的文档直接被用户下载,本站只是中间服务平台,本站所有文档下载所得的收益归上传人(含作者)所有。人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。若文档所含内容侵犯了您的版权或隐私,请立即通知人人文库网,我们立即给予删除!