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本帖產(chǎn)生 1 個(gè) 翻譯EPI ，點(diǎn)擊這里進(jìn)行查看

wanghaiju

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It is about 1000 MPa more than sample made with 31 seconds gas injection time, and much higher than rest of samples investigated during whole researches. That difference between samples no 13 and 14 decreasing in range of temperature form -50°C to +70°C, and above 70°C storage modulus (E’) (for investigated samples) maintain more or less the same value. Forgas injection time gas injection delay time melt temperature
Shenyang Aerospace University (59.46.65.101) - 2014/3/25 Download 110 110 P. Postawa, T. Stachowiak, T. Jaruga Archives of Materials Science and Engineering mechanical properties of injection moulded parts, especially stiffness and density the biggest influence has post filling stage. In GAIM technology gas injection time has that same importance like hold pressure in conventional injection moulding technology.
Using long time of post filling stage we can obtain better mechanical properties (stiffness and density) but to high gas injection time and gas pressure could have negative influence for residual stresses of mouldings [39-42].
4. Conclusions Presented in the article investigations of dynamic mechanical properties by means of DMTA method are useful for interpretation of many phenomena which occur during polymer processing. The fact of existence of influence of used processing conditions on dynamical mechanical properties analysing use DMTA were presented.The most influence on dependence of the storage modulus E’and the mechanical loss factor tg􀄯 has gas injection time, and for this processing parameter observed differences was biggest. In the rest investigation we can see some differences too but its
importance were much more smaller.
The macromolecule packing density (dependent on gas injection time) influence on stiffness of moulded parts.The results and the methodology of the investigations are an example of use of methods of thermal analysis for qualitative assessment of the injection technology, especially in relation to industrial moulded pieces which have to meet high quality standards.
That paper is only one of whole part of research regarding influence of processing condition on properties parts made using gas assisted injection moulding. Rest of results (mechanical properties: stiffness, hardness and other) will be compare with presented in present article.

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1樓 2014-06-09 20:53:57

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reko34

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wanghaiju: 金幣+29, 翻譯EPI+1, ★★★★★最佳答案 2014-06-12 12:31:49

中間段格式亂了，突然插進(jìn)下載信息，只能對單詞硬翻。這文章的語法簡直一坨屎，翻了一大半時(shí)才想到，LZ你是不是貼錯(cuò)文件了？

比31秒氣體注射制成的樣件高1000MPa，比整個(gè)研究中的其余樣件高得多。13和14號(hào)樣件的區(qū)別在-50°C到+70°C之間減小，在70°C以上（所調(diào)查的樣件的）儲(chǔ)能模量(E’)大致維持相同的值。氣體注射時(shí)間氣體注射延遲時(shí)間熔化溫度
沈陽航空航天大學(xué)(59.46.65.101) - 2014/3/25下載 110 110 P. Postawa, T. Stachowiak, T. Jaruga Archives of Materials Science and Engineering 后充填階段對注塑件的機(jī)械特性，尤其是剛度和密度有最大的影響。凱武技術(shù)的氣體注射時(shí)間與常規(guī)注射成型技術(shù)中的保持壓力同樣重要。
長時(shí)間的后充填階段能得到較好的機(jī)械性能（剛度和密度），但高氣體注射時(shí)間和氣體壓力可能對鑄件的參與應(yīng)力產(chǎn)生負(fù)面影響[39-42]。
4. 結(jié)論
文章通過DMTA法研究了動(dòng)態(tài)機(jī)械性能，對解釋聚合物加工中出現(xiàn)的很多現(xiàn)象有用。展示了通過DMTA分析加工條件對動(dòng)態(tài)機(jī)械性能影響的結(jié)果。注塑時(shí)間對儲(chǔ)能模量E’和機(jī)械損失系數(shù)的影響最大，在這個(gè)加工參數(shù)觀察到的區(qū)別最大。其余的研究中也能看到區(qū)別但影響小得多。
高分子堆積密度（取決于氣體注射時(shí)間）對鑄件剛度有影響。研究的結(jié)論和方法是將熱分析方法用于定性評價(jià)注塑技術(shù)的一個(gè)例子，尤其對需滿足質(zhì)量標(biāo)準(zhǔn)的工業(yè)鑄件。
本文只是整個(gè)研究中關(guān)于加工條件對氣體輔助注塑件性能影響的一部分。其余結(jié)果（機(jī)械性能：剛度、硬度等）將會(huì)和本文的內(nèi)容對比。

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2樓2014-06-12 11:14:48