挤出工艺对长碳链尼龙管断裂伸长率的影响
张宁宁,王瑾,薛长鸣,吴宁
上海亚大汽车塑料制品有限公司,上海 201708
Effects of Extrusion Process on Elongation at Break of Long Carbon Chain Nylon Pipe
Zhang Ningning, Wang Jin, Xue Changming, Wu Ning
Shanghai Chinaust Automotive Plastic Co. Ltd., Shanghai 201708, China
摘要:通过挤出工艺生产长碳链尼龙(PA)11管,并采用火焰热处理方式对PA11管进行后处理,借助拉伸试验设备对PA11管的断裂伸长率进行评价。研究了不同的挤出模具温度(模温)、挤出速度、冷却水温和火焰热处理强度等工艺参数对PA11管断裂伸长率的影响。结果表明,PA11管的断裂伸长率随着模温和火焰热处理强度的升高呈现先升高后降低的趋势,随着挤出速度和冷却水温的降低而升高。生产PA11管最佳的工艺参数为模温235℃、挤出速度25 m/min、冷却水温20℃、火焰热处理强度40%,此时PA11管的断裂伸长率达到219%,拉伸后试样表面的“橘皮状”缺陷消失。
Abstract:Long carbon chain nylon (PA11) pipe was produced by extrusion process and then treated by flame heat treatment method. The elongation at break of the PA11 pipe was evaluated by means of tensile test equipment. The effects of die temperature, extrusion speed, cooling water temperature and flame heat treatment intensity on the elongation at break of the PA11 pipe were studied. The results show that the elongation at break of the PA11 pipe first increases and then decreases with the increasing of die temperature and flame heat treatment intensity, increases with the decreasing of extrusion speed and cooling water temperature. The best process parameters for the production of the PA11 pipe are as follows: The die temperature is 235℃, extrusion speed is 25 m/min, cooling water temperature is 20℃ and flame heat treatment intensity is 40%, under these parameters, the elongation at break of the PA11 pipe is 219%, and the "orange peel" defects on the surface of the stretched samples of the PA11 pipe disappear.
关键词:长碳链尼龙管;挤出加工;火焰热处理;断裂伸长率
Keywords:long carbon chain nylon pipe; extrusion process; flame heat treatment; elongation at break
本文引用格式:
张宁宁,王瑾,薛长鸣,等.挤出工艺对长碳链尼龙管断裂伸长率的影响[J].工程塑料应用,2021,49(3):77-80.
Zhang Ningning,Wang Jin,Xue Changming,et al. Effects of extrusion process on elongation at break of long carbon chain nylon pipe[J]. Engineering Plastics Application,2021,49(3):77-80.
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