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畢業(yè)論文外文翻譯
畢業(yè)設(shè)計(jì)（論文）題目
一體化茶葉真空包裝機(jī)設(shè)計(jì)
翻譯題目
一體化茶葉真空包裝機(jī)設(shè)計(jì)
學(xué) 院
工學(xué)院
專 業(yè)
機(jī)械制造及其自動化
姓 名
班 級 學(xué) 號
指導(dǎo)教師
一體化茶葉真空包裝機(jī)設(shè)計(jì)
Direct mechanical energy measures of hammer mill comminution of switchgrass,wheat straw, and corn stover and analysis of their particle size distributions
Abstract: With the development of economy and the improvement of people's living standards, the rapid development of tea in China, in this case to give us tea packing machine a self - show opportunity. In the face of fiery summer, tea sales in full swing, and the attendant is faced with the problem of storage of tea, tea packaging is increasingly important. Over time, those who are not conducive to the storage of tea packaging will be eliminated by the market, and tea vacuum packaging machine as a good helper to help tea to solve their problems.
Keywords: Tea vacuum packaging machine; development; structure; principle;
1. Introduction
Tea vacuum packaging machine with plastic composite film or plastic aluminum foil composite film as packing material, specially designed for tea packaging and design, the other small package can also carry out vacuum packaging, effectively prevent the goods from corruption, to ensure the quality, freshness, taste, color retention, extend the storage period of the product.
Tea vacuum packing machine with plastic composite film or aluminum foil plastic composite film for packaging materials, all kinds of tea, black tea, green tea, oolong tea, Pu'er tea, Dahongpao, instruments and medicines, food and grain. Fruit. Pickles, preserved fruit, aquatic products, native products, chemical raw materials, electronic components and protection products and so on. Whether it is a solid, powder, paste or liquid can be of vacuum heat sealing packaging. Because a high degree of vacuum in the bag, which can effectively prevent lipid oxidation and aerobic bacteria to multiply and cause product spoilage and deterioration of to guarantee, preservation time and flavor, color retention, to extend the period of storage of the products (commodities) and also on some soft object, after vacuum packaging shrink packaging volume, easy transportation and storage.
2. Research status and development trend of tea vacuum packaging machine
2.1 research status
1, sales of packaging materials Our country mainly uses the plastic woven bag, the compound plastic bag as the packing container, but these bags are in the transportation, loading and unloading, the retail and so on many questions need to solve. Use of plastic woven bags to the packaging of tea, the phenomenon of waste is more serious, the general can only use 1-2 times, the relative cost is relatively high. And the packaging is simple, Kaifeng difficult to seal, not conducive to the preservation of a longer period of time, pest, mildew phenomenon is serious. Packaging materials, poor moisture barrier, easy oxidation of moldy tea. Plastic compound bag is made of composite packaging material with high barrier property, in a certain extent, can solve the tea mold, insects, fresh problems, but is difficult to deal with, is not easy to degrade due to using is restricted by certain.
2 domestic sales of packaging 2 kinds of packaging technology
A common pack, using polypropylene plastic woven bag of tea packaging, packaging process did not exert any preservation technology, the packaging of tea mothproof, mildewproof and freshness keeping effect of difference;
Another kind of vacuum packaging technology for packaging, vacuum packaging technology for tea storage has good preservation effect, but due to the shape of tea itself and the choice of vacuum degree is not appropriate, the vacuum packaging choice of vacuum degree is generally between -0.07 ~ -0.09kPa, as long as the vacuum degree in this range, the factory are qualified products. Because of the vacuum degree is bigger, the packaging material tightly wrapped tea, because tea at both ends of a sharp, packaging bag can easily be punctured rice and formation of pinholes, packing bag will leak, resulting in vacuum package failure. The test shows that the vacuum degree of the vacuum is -0.09MPa of the tea packing bag, still placed, not stacking, in 20 days, the packing bag of the broken rate is 16%, so high vacuum degree will inevitably lead to high rate of broken bag. In the distribution process, the friction, impact and drop of the bags are also easy to break the bag. According to the statistical vacuum packaging in the circulation process of the broken bag rate reached 30%. Because of the vacuum packing problem caused by the waste of tea, to consumers and businesses have brought the loss and trouble. So it is good for the tea to be combined with the current environment, so as to achieve good results.
2.2 development trend
Vacuum packaging technology originated in 1940s. Since the successful application of polyester, polyethylene plastic film in 1950, the vacuum packaging machine has been developed rapidly, and its technical development trend is mainly reflected in the high productivity, automation, multi function, the composition of production lines, the use of new technologies, these five aspects. ?
High productivity. The productivity of the vacuum packaging machine has been developed from 10 parts per minute, the production rate of thermal forming, filling and sealing machine can reach 500 pieces per minute. ?
Adopt related new technology. On the packaging method, the packaging is replaced by vacuum packaging, which is closely integrated with the three aspects of packaging, packaging materials and packaging machine. It is used in the control technology, and the technology of computer and micro electronics technology. The advanced device is installed on the vacuum packaging machine.
Production automation: the automation of the vacuum packaging machine not only improves the production efficiency, but also has the advantages of safety and health. Japan, a company of the production of rotary vacuum chamber type packaging machine, is a very high degree of automation, multi - station packaging machine. The machine has 2 rotary table, filling and pumping vacuum, filling the turntable with 6 positions, the filling material, the injection, the injection of the package to the vacuum rotary table; the vacuum rotary table has 12 positions (vacuum chamber), and the production efficiency can reach 40 bags / min, mainly used for packaging of soft canned food.
With production line: when the function is more and more, the function of all the functions on a single machine will make the structure becomes very complex, operation and maintenance is not convenient. By this time, the function of the machine can be matched with different efficiency and the efficiency of the machine can be more complete. As the development of a company in France fish vacuum packaging production line, textile vacuum packaging system. Other models belong to this type. China Industry Fair will science and technology forum for 11 consecutive years the focus criteria, this year the experts and entrepreneurs around the "green packaging" main proposition to packaging materials, transportation, hazardous substances provisions of standard topics in-depth discussion. National Development and Reform Commission deputy inspector Zhao Penggao introduced, China's large and medium cities of packaging waste volume accounted for nearly 1/2 of the total municipal solid waste, the weight of 1/3, the implementation of green packaging, packaging material to reduce pollution has become a major and pressing issues. "Standard content is not reasonable and perfect; the standard is not enough coordination, the lack of systematic; heavy form, can be operated". ?
The World Packaging Organization Asian Packaging Center President Kim Xiangzuo "China in the future to be become truly global packaging industry center, promote the development of industrial clusters and technological progress, must improve the China in the world packaging industry discourse and rule making power. The seminar delivered an industry recognized information, the status quo of China's packaging industry standard, has been unable to meet the actual needs of the industry's rapid development, and realize the packaging by "big" to "strong", it is urgent to improve the standardization level of the whole industry. Gold Xiangzuo revealed in our country is in the planning and construction of world packaging industry center, the construction of the world packet based, development of civil military integration, science and technology research and development, trade and logistics, cultural and creative, packaging equipment, packaging materials, agricultural products processing, packaging etc. key base; the implementation of WTO Research Institute, WPO University, high-end packaging products, advanced packaging equipment, new packaging materials such as 18 key projects, which led by the world packaging center group world packaging industry center "will joint enterprises, state-owned enterprises and foreign enterprises joint investment, facing the global investment, is expected to the scale of investment of more than 120 billion yuan.
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