共查询到18条相似文献,搜索用时 62 毫秒
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介绍了电冰箱塑料内胆生产中的2类真空成型方法即凸模成型和凹模成型,概括了真空成型产品设计、模具设计和加工中的注意事项。 相似文献
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大庆石化公司自主研发生产板材ABS树脂 总被引:1,自引:0,他引:1
2008年12月,国产冰箱终于装上了我国自主研发的“中国芯”。大庆石化公司化工三厂自主研发生产的板材ABS树脂产品销往国内冰箱配套生产厂家,用于制造国产冰箱内胆。板材ABS树脂生产技术在大庆石化公司的成功工业化,结束了我国冰箱生产完全依靠进口板材ABS树脂的历史。 相似文献
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冰箱门胆真空吸塑成型模具抽芯机构设计 总被引:1,自引:0,他引:1
在充分分析斜滑块抽芯机构运动及受力状态的基础上,介绍了一种利用脱模力抽芯的非气动抽芯机构设计方法,采用该方法设计的冰箱门胆吸塑模具结构紧凑、抽芯可靠、生产效率高。 相似文献
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Understanding the effects of material and processing parameters on the thermoforming process is critical to the optimization of processing conditions and the development of better materials for high quality products. In this study we investigated the influence of initial temperature distribution over the sheet on the part thickness distribution of a vacuum snap‐back forming process. The linear viscoelastic properties along with the Wagner two parameter nonlinear viscoelastic constitutive model were utilized for numerical simulation of the thermoforming operation. Simulations of pre‐stretched vacuum thermoforming with a relatively complex mold for a commercial refrigerator liner were conducted. THe effects of temperature distribution over the sheet on the part thickness distribution were determined to examine process sensitivity and optimization. Effects of the temperature distribution on the material rheology and polymer/mold friction coefficient are primarily responsible for the changes in the thickness distribution. We found that even small temperature differences over the sheet greatly influenced bubble shape and pole position during the bubble growth stage and played a critical role in determining the part thickness distribution. These results are discussed in terms of rheological properties of polymers such as elongational viscosity and strain hardening. 相似文献
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内衬层生产线可分为挤出压延法和压延法2种。全钢子午胎内衬层主受采用挤出压延法,而半钢和工程子午胎内衬层主要采用压延法生产。介绍了这2种内衬层生产线的结构组成、工艺流程、技术特点和技术参数等。分析了2种生产线配套辅机的结构特点。 相似文献
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