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編號
無錫太湖學院
畢業(yè)設計（論文）
相關資料
題目： 吹風機外殼的模具設計與加工
信機 系 機械工程及自動化專業(yè)
學 號： 0923234
學生姓名： 馮 亞
指導教師： 王士同 （職稱：教授 ）
（職稱： ）
2013年5月25日
目 錄
一、畢業(yè)設計（論文）開題報告
二、畢業(yè)設計（論文）外文資料翻譯及原文
三、學生“畢業(yè)論文（論文）計劃、進度、檢查及落實表”
四、實習鑒定表
無錫太湖學院
畢業(yè)設計（論文）
開題報告
題目： 吹風機外殼的模具設計與加工
信機 系 機械工程及自動化 專業(yè)
學 號： 0923234
學生姓名： 馮 亞
指導教師： 王士同 （職稱：教授 ）
（職稱： ）
2012年11月14日
課題來源
自擬題目
科學依據（包括課題的科學意義；國內外研究概況、水平和發(fā)展趨勢；應用前景等）
（1）課題科學意義
模具工業(yè)是國民經濟的基礎產業(yè)，據統(tǒng)計，金屬零件粗加工的75%、精加工的50%和塑料零件的90%是用模具加工完成的。被譽為“工業(yè)之母”、“皇冠工業(yè)”的模具制造業(yè)是高技術密集型產業(yè)，模具工業(yè)已成為先進制造技術的重要組成部分。模具工業(yè)的發(fā)展水平標志著一個國家工業(yè)水平及產品開發(fā)能力。注塑模具是在成型中賦予塑料以形狀和尺寸的部件。模具的結構雖然由于塑料品種和性能、塑料制品的形狀和結構以及注射機的類型等不同而可能千變萬化，但是基本結構是一致的。模具主要由澆注系統(tǒng)、成型零件和結構零件三部分組成。其中澆注系統(tǒng)和成型零件是與塑料直接接觸部分，并隨塑料和制品而變化，是塑模中最復雜，變化最大，要求加工光潔度和精度最高的部分。塑料相對金屬，密度小，但強度比較高，絕緣性能優(yōu)良，具有非常好的抗化學腐蝕性，在機械、化工、汽車、航空航天等領域，塑料已經大規(guī)模的取代了金屬。目前塑料制件在工業(yè)、日常生活各領域幾乎無處不在。所以掌握模具設計這一門技巧，對于未來從事相關行業(yè)的我們極其重要。在本課題的制做過程中，我們還鍛煉使用UG 、AUTOCAD等CAD,CAE繪圖軟件的技巧。使我們在塑件結構設計、塑料成型工藝分析、塑料模具數字化設計、塑料模具零件的選材、熱處理、塑料模具零件的制造，以及資料檢索、英文翻譯等方面獲得綜合訓練，為未來工作適應期奠定堅實的基礎。
（2）國內外研究概況
改革開放以來，隨著國民經濟的高速發(fā)展，市場對模具的需求量不斷增長。近年來，模具工業(yè)一直以 15%左右的增長速度快速發(fā)展，模具工業(yè)企業(yè)的所有制成分也發(fā)生了巨大變化，除了國有專業(yè)模具廠外，集體、合資、獨資和私營也得到了快速發(fā)展。而模具制造是整個鏈條中最基礎的要素之一，模具制造技術現已成為衡量一個國家制造業(yè)水平高低的重要標志，并在很大程度上決定企業(yè)的生存空間。隨著制造業(yè)的發(fā)展，模具于20世紀20~30年代，特別是美國于20世紀30年代制定了第一部模具零件的標準后，進入產業(yè)化生產。模具產業(yè)化生產經歷了作坊式和工業(yè)化生產兩個階段，直至20世紀80年代初計算機工業(yè)和數控機床的廣泛應用，特別是模具標準化程度與水平的提高，模具生產開始進入現代化生產時代，各工業(yè)國家才形成現代模具工業(yè)體系。我國隨著現代制造業(yè)的發(fā)展，在學習工業(yè)國家建設模具業(yè)基礎上，經歷20多年的努力與進步，與20世紀90年代，在制定﹑完善模具技術標準體系，并實行標準件專業(yè)化生產的條件下，創(chuàng)建了20余個群體式模具生產基地，從而形成了模具生產齊全﹑具有近兩萬個模具生產能力，以及與之相關的企業(yè)的模具工業(yè)體系。其中，有近20%的模具生產企業(yè)，已實現了現代化模具生產方式。但是，國內在模具制造方面仍需繼續(xù)努力。
（3)水平和發(fā)展趨勢
縱觀我國模具設計制造，其水平上在總體上要比工業(yè)發(fā)達國家落后許多，其差距主要表現在下列六方面： (1)國內自配率不足80％，中低檔模具供過于求，中高檔模具自配率不足60％。 (2)企業(yè)組織結構、產品結構、技術結構和進出口結構都不夠合理。 (3)模具產品水平和生產工藝水平總體上比國際先進水平低許多，而模具生產周期卻要比國際先進水平長許多。 (4)開發(fā)能力弱，經濟效益欠佳。我國模具企業(yè)技術人員比例較低，水平也較低，不重視產品開發(fā)，在市場中常處于被動地位。 (5)模具標準化水平和模具標準件使用覆蓋率低。 (6)與國際先進水平相比，模具企業(yè)的管理落后更甚于技術落后。未來我國的模具將呈現十大發(fā)展趨勢：一是模具日趨大型化。二是模具的精度越來越高。三是多功能復合模具將進一步發(fā)展。新型多功能復合模具除了沖壓成型零件外，還擔負疊壓、攻絲、鉚接和鎖緊等組裝任務，對鋼材的性能要求也越來越高。四、是熱流道模具在塑料模具中的比重逐漸提高。五、是隨著塑料成型工藝的不斷改進與發(fā)展，氣輔模具及適應高壓注射成型等工藝的模具將隨之發(fā)展。六、是標準件的應用將日漸廣泛。七、是快速經濟模具的前景十分廣闊。八、是隨著車輛和電機等產品向輕量化發(fā)展，壓鑄模的比例將不斷提高，同時對壓鑄模的壽命和復雜程度也將提出越來越高的要求。九、是以塑代鋼、以塑代木的進程進一步加快，塑料模具的比例將不斷增大。十、是模具技術含量將不斷提高，中、高檔模具比例將不斷增大，這也是產品結構調整所導致模具市場走勢的變化。
研究內容
⑴塑件成型工藝分析 ⑵分型面及澆注系統(tǒng)的確定 ⑶塑料模具設計的方案論證 ⑷主要零部件的設計計算 ⑸繪制裝配圖的基本規(guī)范 ⑹繪制零件圖的基本規(guī)范 ⑺設計計算的說明書的編寫。
擬采取的研究方法、技術路線、實驗方案及可行性分析
研究方法：1.利用現有資料對零件了解 2.確定合理的工藝方案 3.設定合理的模具結構 4. 設計要全面介紹模具的工作原理
可行性分析：設計概念產生了以后，就有了比較明確的設計方案，但這個設計方案是否可行，還必須從社會文化、技術經濟等方面進行各種形式的評估與驗證，從而更好地提升設計階段的工作效果。
a,社會文化:社會文化影響著人們的生活方式、價值觀念和消費習慣，從而影響到市場需求。產品的價值往往體現在以最低的價格獲取最多的功能，與目標用戶的價值觀念和生活方式相吻合的價格適宜。b，吹風機問卷調查顯示對于使用者對電吹風 有什么要求,從這表上,我們知道大多數人對于電吹風的質量是要求比較高,因為在使用的時候,他們認為如果質量好些的話會比較安全,其次就是功能上,電吹風的功能可能主要體現在電吹 風的科技水平上,現在有的電吹風用紅外線殺菌,保護頭皮等有先進的惡功能,是再是價格上大家都喜歡用物美價廉的東西.對于品牌上,在于品牌的選擇還是相對來說還是比較少點,但是品牌也是質量等其它方面的象征,選擇品牌的人還是有的，調查中女孩子對于電吹風的外觀要求好看些。
研究計劃及預期成果
研究計劃：
2012年10月12日-2011年12月25日：按照任務書要求查閱論文相關參考資料，填寫畢業(yè)設計開題報告書。
2013年1月11日-2012年3月5日：填寫畢業(yè)實習報告。
2013年3月8日-2012年3月14日：按照要求修改畢業(yè)設計開題報告。
2013年3月15日-2012年3月21日：學習并翻譯一篇與畢業(yè)設計相關的英文材料。
2013年3月22日-2012年4月11日：模具設計。
2013年4月12日-2012年4月25日：模具設計。
2013年4月26日-2012年5月21日：畢業(yè)論文撰寫和修改工作。
預期成果：
達到預期的設計結果，使吹風機利用設計的模具在廠家拿到圖紙的同時就能生產出成品并且設計的吹風機在市場上有一定的前景。
特色或者創(chuàng)新之處
1、這款吹風機是創(chuàng)新造型設計，不僅僅是對這一普及性產品的重新設計，更賦予了產品新的藝術生命。
2、整體造型簡潔美觀，收納簡便。后帶凹槽可整潔地收納電纜，隱藏式的開關設置在手柄的一端。
3、本設計的產品成本低，簡單方便易使用，每處細節(jié)的都完美的體現出精心設計下的良苦用心。
已具備的條件和尚需解決的問題
1、產品設計的思路明確.已經具備了繪制UG圖形的能力和方法。
2、產品零件圖樣的繪制和工藝標準的確定方面需要加強
指導教師意見
指導教師簽名：王士同 2013年 2月 25日
教研室（學科組、研究所）意見
教研室主任簽名：
年 月 日
系意見
主管領導簽名：
年 月 日
英文原文
CONCURRENT DESIGN OF PLASTICS INJECTION MOULDS
Assist.Prof.Dr. A. YAYLA /Prof.Dr. Pa? a YAYLA
Abstract
The plastic product manufacturing industry has been growing rapidly in recent years. One of the most popular processes for making plastic parts is injection moulding. The design of injection mould is critically important to product quality and efficient product processing.
Mould-making companies, who wish to maintain the competitive edge, desire to shorten both design and manufacturing leading times of the by applying a systematic mould design process. The mould industry is an important support industry during the product development process, serving as an important link between the product designer and manufacturer. Product development has changed from the traditional serial process of design, followed by manufacture, to a more organized concurrent process where design and manufacture are considered at a very early stage of design. The concept of concurrent engineering (CE) is no longer new and yet it is still applicable and relevant in today’s manuf acturing environment. Team working spirit, management involvement, total design process and integration of IT tools are still the essence of CE. The application of The CE process to the design of an injection process involves the simultaneous consideration of plastic part design, mould design and injection moulding machine selection, production scheduling and cost as early as possible in the design stag
This paper presents the basic structure of an injection mould design. The basis of this system arises from an analysis of the injection mould design process for mould design companies. This injection mould design system covers both the mould design process and mould knowledge management. Finally the principle of concurrent engineering process is outlined and then its principle is applied to the design of a plastic injection mould.
Keywords :Plastic injection mould design, Concurrent engineering, Computer aided engineering, Moulding conditions, Plastic injection moulding, Flow simulation
1. Introductio
Injection moulds are always expensive to make, unfortunately without a mould it can not be possible ho have a moulded product. Every mould maker has his/her own approach to design a mould and there are many different ways of designing and building a mould. Surely one of the most critical parameters to be considered in the design stage of the mould is the number of cavities, methods of injection, types of runners, methods of gating, methods of ejection, capacity and features of the injection moulding machines. Mould cost, mould quality and cost of mould product are inseparable
In today’s completive environment, computer aided mould filling simulation packages can accurately predict the fill patterns of any part. This allows for quick simulations of gate placements and helps finding the optimal location. Engineers can perform moulding trials on the computer before the part design is completed. Process engineers can systematically predict a design and process window, and can obtain information about the cumulative effect of the process variables that influence part performance, cost, and appearance.
2. Injection Moulding
Injection moulding is one of the most effective ways to bring out the best in plastics. It is universally used to make complex, finished parts, often in a single step, economically, precisely and with little waste. Mass production of plastic parts mostly utilizes moulds. The manufacturing process and involving moulds must be designed after passing through the appearance evaluation and the structure optimization of the product design. Designers face a huge number of options when they create injection-moulded components. Concurrent engineering requires an engineer to consider the manufacturing process of the designed product in the development phase. A good design of the product is unable to go to the market if its manufacturing process is impossible or too expensive. Integration of process simulation, rapid prototyping and manufacturing can reduce the risk associated with moving from CAD to CAM and further enhance the validity of the product development.
3. Importance of Computer Aided Injection Mould Design
The injection moulding design task can be highly complex. Computer Aided Engineering (CAE) analysis tools provide enormous advantages of enabling design engineers to consider virtually and part, mould and injection parameters without the real use of any manufacturing and time. The possibility of trying alternative designs or concepts on the computer screen gives the engineers the opportunity to eliminate potential problems before beginning the real production. Moreover, in virtual environment, designers can quickly and easily asses the sensitivity of specific moulding parameters on the quality and manufacturability of the final product. All theseCAE tools enable all these analysis to be completed in a meter of days or even hours, rather than weeks or months needed for the real experimental trial and error cycles. As CAE is used in the early design of part, mould and moulding parameters, the cost savings are substantial not only because of best functioning part and time savings but also the shortens the time needed to launch the product to the market.
The need to meet set tolerances of plastic part ties in to all aspects of the moulding process, including part size and shape, resin chemical structure, the fillers used, mould cavity layout, gating, mould cooling and the release mechanisms used. Given this complexity, designers often use computer design tools, such as finite element analysis (FEA) and mould filling analysis (MFA), to reduce development time and cost. FEA determines strain, stress and deflection in a part by dividing the structure into small elements where these parameters can be well defined. MFA evaluates gate position and size to optimize resin flow. It also defines placement of weld lines, areas of excessive stress, and how wall and rib thickness affect flow. Other finite element design tools include mould cooling analysis for temperature distribution, and cycle time and shrinkage analysis for dimensional control and prediction of frozen stress and warpage.
The CAE analysis of compression moulded parts is shown in Figure 1. The analysis cycle starts with the creation of a CAD model and a finite element mesh of the mould cavity. After the injection conditions are specified, mould filling, fiber orientation, curing and thermal history, shrinkage and warpage can be simulated. The material properties calculated by the simulation can be used to model the structural behaviour of the part. If required, part design, gate location and processing conditions can be modified in the computer until an acceptable part is obtained. After the analysis is finished an optimized part can be produced with reduced weldline (known also knitline), optimized strength, controlled temperatures and curing, minimized shrinkage and warpage. Machining of the moulds was formerly done manually, with a toolmaker checking each cut. This process became more automated with the growth and widespread use of computer numerically controlled or CNC machining centres. Setup time has also been significantly reduced through the use of special software capable of generating cutter paths directly from a CAD data file. Spindle speeds as high as 100,000 rpm provide further advances in high speed machining. Cutting materials have demonstrated phenomenal performance without the use of any cutting/coolant fluid whatsoever. As a result, the process of machining complex cores and cavities has been accelerated.
It is good news that the time it takes to generate a mould is constantly being reduced. The bad news, on the other hand, is that even with all these advances, designing and manufacturing of the mould can still take a long time and can be extremely expensive.
Figure 1 CAE analysis of injection moulded parts
Many company executives now realize how vital it is to deploy new products to market rapidly. New products are the key to corporate prosperity. They drive corporate revenues, market shares, bottom lines and share prices. A company able to launch good quality products with reasonable prices ahead of their competition not only realizes 100% of the market before rival products arrive but also tends to maintain a dominant position for a few years even after competitive products have finally been announced (Smith, 1991). For most products, these two advantages are dramatic. Rapid product development is now a key aspect of competitive success. Figure 2 shows that only 3–7% of the product mix from the average industrial or electronics company is less than 5 years old. For companies in the top quartile, the number increases to 15–25%. For world-class firms, it is 60–80% (Thompson, 1996). The best companies continuously develop new products. At Hewlett-Packard, over 80% of the profits result from products less than 2 years old! (Neel, 1997)
Figure 2. Importance of new product (Jacobs, 2000)
With the advances in computer technology and artificial intelligence, efforts have been directed to reduce the cost and lead time in the design and manufacture of an injection mould. Injection mould design has been the main area of interest since it is a complex process involving several sub-designs related to various components of the mould, each requiring expert knowledge and experience. Lee et. al. (1997) proposed a systematic methodology and knowledge base for injection mould design in a concurrent engineering environment.
4. Concurrent Engineering in Mould Design
Concurrent Engineering (CE) is a systematic approach to integrated product development process. It represents team values of co-operation, trust and sharing in such a manner that decision making is by consensus, involving all per spectives in parallel, from the very beginning of the product life-cycle (Evans, 1998). Essentially, CE provides a collaborative, co-operative, collective and simultaneous engineering working environment. A concurrent engineering approach is based on five key elements:
1. process
2. multidisciplinary team
3. integrated design model
4. facility
5. software infrastructure
Figure 3 Methodologies in plastic injection mould design, a) Serial engineering b) Concurrent engineering
In the plastics and mould industry, CE is very important due to the high cost tooling and long lead times. Typically, CE is utilized by manufacturing prototype tooling early in the design phase to analyze and adjust the design. Production tooling is manufactured as the final step. The manufacturing process and involving moulds must be designed after passing through the appearance evaluation and the structure optimization of the product design. CE requires an engineer to consider the manufacturing process of the designed product in the development phase. A good design of the product is unable to go to the market if its manufacturing process is impossible. Integration of process simulation and rapid prototyping and manufacturing can reduce the risk associated with moving from CAD to CAM and further enhance the validity of the product development
For years, designers have been restricted in what they can produce as they generally have to design for manufacture (DFM) – that is, adjust their design intent to enable the component (or assembly) to be manufactured using a particular process or processes. In addition, if a mould is used to produce an item, there are therefore automatically inherent restrictions to the design imposed at the very beginning. Taking injection moulding as an example, in order to process a component successfully, at a minimum, the following design elements need to be taken into account:
1. . geometry; . draft angles, . Non re-entrants shapes, . near constant wall thickness, . complexity, . split line location, and . surface finish, 2. material choice; 3. rationalisation of components (reducing assemblies);
4. cost.
In injection moulding, the manufacture of the mould to produce the injection-moulded components is usually the longest part of the product development process. When utilising rapid modelling, the CAD takes the longer time and therefore becomes the bottleneck.
The process design and injection moulding of plastics involves rather complicated and time consuming activities including part design, mould design, injection moulding machine selection, production scheduling, tooling and cost estimation. Traditionally all these activities are done by part designers and mould making personnel in a sequential manner after completing injection moulded plastic part design. Obviously these sequential stages could lead to long product development time. However with the implementation of concurrent engineering process in the all parameters effecting product design, mould design, machine selection, production scheduling, tooling and processing cost are considered as early as possible in the design of the plastic part.
When used effectively, CAE methods provide enormous cost and time savings for the part design and manufacturing. These tools allow engineers to virtually test how the part will be processed and how it performs during its normal operating life. The material supplier, designer, moulder and manufacturer should apply these tools concurrently early in the design stage of the plastic parts in order to exploit the cost benefit of CAE. CAE makes it possible to replace traditional, sequential decision-making procedures with a concurrent design process, in which all parties can interact and share information, Figure 3. For plastic injection moulding, CAE and related design data provide an integrated environment that facilitates concurrent engineering for the design and manufacture of the part and mould, as well as material selection and simulation of optimal process control parameters.
Qualitative expense comparison associated with the part design changes is shown in Figure 4 , showing the fact that when design changes are done at an early stages on the computer screen, the cost associated with is an order of 10.000 times lower than that if the part is in production. These modifications in plastic parts could arise fr om mould modifications, such as gate location, thickness changes, production delays, quality costs, machine setup times, or design change in plastic parts.
Figure 4 Cost of design changes during part product development cycle (Rios et.al, 2001)
At the early design stage, part designers and moulders have to finalise part design based on their experiences with similar parts. However as the parts become more complex, it gets rather difficult to predict processing and part performance without the use of CAE tools. Thus for even relatively complex parts, the use of CAE tools to prevent the late and expensive design changesand problems that can arise during and after injection. For the successful implementation of concurrent engineering, there must be buy-in from everyone involved.
5.Case Study
Figure 5 shows the initial CAD design of plastics part used for the sprinkler irrigation hydrant leg. One of the essential features of the part is that the part has to remain flat after injection; any warping during the injection causes operating problems. Another important feature the plastic part has to have is a high bending stiffness. A number of feeders in different orientation were added to the part as shown in Figure 5b. These feeders should be designed in a way that it has to contribute the weight of the part as minimum as possible.
Before the design of the mould, the flow analysis of the plastic part was carried out with Moldflow software to enable the selection of the best gate location Figure 6a. The figure indicates that the best point for the gate location is the middle feeder at the centre of the part. As the distortion and warpage of the part after injection was vital from the functionality point of view and it has to be kept at a minimum level, the same software was also utilised to yiled the warpage analysis. Figure 5 b shows the results implying the fact that the warpage well after injection remains within the predefined dimensional tolerances.
6.Conclusions
In the plastic injection moulding, the CAD model of the plastic part obtained from commercial 3D programs could be used for the part performance and injection process analyses. With the aid of CEA technology and the use of concurrent engineering methodology, not only the injection mould can be designed and manufactured in a very short of period of time with a minimised cost but also all potential problems which may arise from part design, mould design and processing parameters could be eliminated at the very beginning of the mould design. These two tools help part designers and mould makers to develop a good product with a better delivery and faster tooling with less time and money.
Referenc
1.Smith P, Reinertsen D, The time-to-market race, In: Developing Products in Half the Time. New York, Van Nostrand Reinhold, pp. 3–13, 1991
2.Thompson J, The total product development organization. Proceedings of the Second Asia–Pacific Rapid Product Development Conference, Brisbane, 1996
3.Neel R, Don’t stop after the prototype, Seventh International Conference on Rapid Prototyping, San Francisco, 1997
4.Jacobs PF, “Chapter 3: Rapid Product Development” in Rapid Tooling: Technologies and Industrial Applications , Ed. Peter D. Hilton; Paul F. Jacobs, Marcel Decker, 2000
5.Lee R-S, Chen, Y-M, and Lee, C-Z, “Development of a concurrent mould design system: a knowledge based approach”, Computer Integrated Manufacturing Systems, 10(4), 287-307, 1997
6.Evans B., “Simultaneous Engineering”, Mechanical Engineering , Vol.110, No.2, pp.38-39, 1998
7.Rios A, Gramann, PJ and Davis B, “Computer Aided Engineering in Compression Molding”, Composites Fabricators Association Annual Conference , Tampa Bay, 2001
中文譯文
塑料注射模具的并行設計
摘要
塑料產品制造業(yè)已在近幾年迅速增長。用于制造塑料部件的最流行的過程之一是注塑。注塑模具的設計是非常重要的產品質量和高效的產品加工。
模具制造公司，誰愿意以保持競爭優(yōu)勢，縮短應用系統(tǒng)的模具設計過程中，設計和制造領先時代的欲望。模具行業(yè)在產品開發(fā)過程中的重要支撐產業(yè)，作為產品的設計者和制造商之間的一個重要環(huán)節(jié)。從產品的發(fā)展，改變了傳統(tǒng)的串行設計過程中，其次是制造，一個更有組織的并發(fā)設計和制造過程中被認為是在一個非常早期的設計階段。并行工程（CE）的概念已不再是新鮮事，但它仍然是適用的，在今天的化學品制造acturing環(huán)境相關。團隊合作精神，管理人員的參與，整個設計過程和集成的IT工具仍然是CE的本質。同時考慮應用的CE程序設計的一個注入進程涉及的塑料零件設計，模具設計和注塑機選擇，生產調度和成本盡早在設計雄鹿
本文介紹了注塑模具設計的基本結構。這個系統(tǒng)的基礎上產生的注塑模具設計過程的分析，模具設計公司。注塑模具設計系統(tǒng)涵蓋了模具設計工藝和模具知識管理。最后的原則的并發(fā)工程過程的概述，然后被施加到其原理的塑料注射模具的設計。
關鍵詞：注塑模具的設計，并行工程，計算機輔助工程，成型條件，注塑成型，流程模擬
1.導論
注塑模具往往成本很大，不幸的是沒有的模具，它不能是可能浩有一個模制產品。每一個模具制造商都有他/她自己的方式來設計模具，模具的設計和建設一個有許多不同的方式。當然，模具的設計階段，要考慮的最重要的參數之一是空腔，注射方法，跑步者的類型的，選通的方法，噴射，容量和特性的注塑機的方法的數量。模具成本，模具的模具產品的質量和成本是分不開的。
在今天的環(huán)境，計算機輔助模具填充仿真工具包，可以準確地預測任何部分的填充圖案。這可以快速模擬的門安置，并幫助找到最佳的位置。以前的部分設計完成后，工程師可以在電腦上進行成型試驗。工藝工程師可以系統(tǒng)地預測設計和工藝窗口，可以獲取信息的過程變量影響性能，成本和外觀的累積效應。
2.注塑成型
注塑成型是最好的塑料帶出最有效的方法之一。這是普遍使用的，往往是在一個單一的步驟，使復雜，成品零件經濟，精確和廢物少。大規(guī)模生產的塑料部件大多采用的模具。后通過的外觀評價及結構優(yōu)化的產品設計，制造過程中，涉及模具的設計必須。設計人員面臨的注塑成型部件的選擇，當他們創(chuàng)建一個龐大的數字。并行工程要求工程師在開發(fā)階段考慮制造過程的設計的產品。一個好的設計的產品是不能去的市場，如果其生產過程中是不可能的，或過于昂貴。與從CAD到CAM過程的仿真，快速原型制造的集成可以降低風險，進一步提升產品開發(fā)的有效性。
3.計算機輔助注塑模具設計的重要性
注塑模具設計任務可以是非常復雜的。計算機輔助工程（CAE）分析工具使設計工程師提供了巨大的優(yōu)勢，幾乎和零件，模具及注塑參數沒有真正的使用任何制造和時間的考慮。嘗試另一種設計或概念在計算機屏幕上的可能性給出了工程師的機會，以消除潛在的問題，然后再開始真正的生產。此外，在虛擬環(huán)境中，設計人員可以快速，方便地評估特定的成型參數對最終產品的質量和可制造性的靈敏度。所有theseCAE工具，使所有這些分析，在一米的幾天甚至幾個小時內完成，而不是幾周或幾個月需要對實際的試驗和錯誤周期。由于采用的是早期設計的零件，模具和成型工藝參數CAE不僅是因為最佳的功能的一部分，節(jié)省時間，也縮短了所需的時間向市場推出的產品，節(jié)約成本是巨大的。
需要設定的公差，以滿足的塑料部分關系到成型過程中的各個方面，包括零件的尺寸和形狀，樹脂的化學結構，使用的填料，模腔布局，澆注，模具冷卻和釋放機制。鑒于這種復雜性，設計人員經常使用電腦的設計工具，如有限元分析（FEA）和模流分析（MFA），以減少開發(fā)時間和成本。有限元分析確定應變，應力和偏轉通過劃分成小的元素，這些參數可以很好地定義的結構的一部分中。 MFA評估澆口位置和大小以優(yōu)化樹脂流動。它還定義的焊接線，過度緊張的地區(qū)，壁和肋骨厚度如何影響流量的位置。其他有限元設計工具，包