This table is made of plastic. Which plastic is known for being lightweight and easy to mold? A. PS B. PMMA C. PET D. PP 相关知识点: 试题来源: 解析 A。PS(聚苯乙烯)材质的塑料以轻便、易成型而著称。PMMA(聚甲基丙烯酸甲酯)是有机玻璃,比较重。PET(聚对苯二甲酸乙二醇酯)通常用于饮料瓶等...
根据第四段Accompany named Diageo has just announced the first paper bottle with a non-plastic coating sprayed on the inside of the bottles.可知, Diageo公司刚刚推出了第一款在瓶子内部喷涂非塑料涂层的纸瓶。故选D。 4.C 推理判断题。最后一段作者谈到:尽管在纸瓶可以取代玻璃瓶或塑料瓶之前还有很多测试...
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aMaterial selection of plastic mold is decided by their using performances.According to the mold types, material types and performance requirements,we select different heat treatment. 塑料模子的物质选择由他们使用的表现决定。根据模子类型,物质类型和性能要求,我们选择另外热治疗。 [translate] ...
aInjection molding involves injecting molten plastic into a mold. Only a small amount of recycled plastic is used in this process, says John Coulter, Lehigh associate professor of mechanical engineering and mechanics, because recycled plastic is poor in quality and would reduce the product’s streng...
3. Overview of Plastic Forming Machines In general, plastic forming machines mold materials by pressing them against dies attached to the press. A high-speed press can stamp materials several thousand times a minute. Other machines include transfer presses, which can form a number of parts at on...
Plastic Material:PP; Process Combination Type:Single-Process Mode; Application:Car, Household Appliances, Furniture, Commodity, Electronic; Runner:Cold Runner; Design Software:UG; Installation:Fixed; Standard:HASCO; Customized:Customized; Cavity:2+2; ...
The reason why the gate ofinjection molding productsis easy to produce gas marks or jet marks may be caused by the following aspects: 1. Uneven plastic flow:The gate is the first place where plastic is injected into the mold, when the plastic flows into the mold, the flow speed, pressure...
Plastic is injected into the mold via a first injection channel ( 22 ) with the core retained in position by the stops ( 13-18 ). Subsequently the retaining stops ( 13-18 ) are retracted and the mold cavity is completely filled via a second injection channel ( 23, 24, 25 ).Klaus ...