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A Comparative Evaluation of Application Techniques of a Paint-On Die Spacer in Grooves: An In Vitro Study

机译:沟槽式涂装模具垫片的应用技术比较评估:一项体外研究

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摘要

The use of paint-on die spacer to improve the seating of casting has become quite popular in the recent years. The generally accepted range of paint-on die spacer is approximately 20–40 μm, which suggests a range of tolerance. The painting of the retentive grooves with die spacer has always been a subject of debate. The primary purpose of this study was to determine if there was a tendency for the paint-on die spacer to accumulate in grooves of tooth preparation in sufficient thickness to exceed this accepted range of tolerance when applied using two different techniques. Eight die stone blocks with three grooves each were prepared. Half the samples were painted in unidirectional method and the other halves were painted using the haphazard method of application. The thickness of the die spacer was measured at different positions using 200× magnification and the mean and standard deviations were calculated. On analysis it was seen that the thickness of the paint-on die spacer in grooves was in the range of 20–40 μm for unidirectional method of application, whereas in haphazard method of application the thickness of the paint-on die spacer was in the range of 28–132 μm. From the above study it was concluded that the method of application influenced the thickness of the paint-on die spacer. The recommended thickness of the die spacer was achieved on unidirectional method of application.
机译:近年来,使用涂料模具间隔件来改善铸件的定位已变得非常流行。模具上的隔离层通常可接受的范围是20–40μm,这表明公差范围。带有模具垫片的保持槽的油漆一直是争论的话题。这项研究的主要目的是确定当使用两种不同的技术应用时,涂装模具垫片是否有足够的厚度积聚在牙齿准备槽中的趋势,以超过该可接受的公差范围。制备了八个具有三个凹槽的石块。一半的样品采用单向喷涂法,其余的一半采用随机涂覆法喷涂。使用200倍放大倍率在不同位置测量模具垫片的厚度,并计算平均值和标准偏差。经分析可知,单向涂覆方法中,凹槽中的涂装模具垫片的厚度在20–40μm的范围内,而在偶然的涂覆方法中,涂在模具中的垫片垫片的厚度在20-40μm的范围内。范围为28-132μm。从以上研究得出的结论是,涂覆方法影响了涂模间隔件的厚度。模具垫片的推荐厚度是通过单向施加方法实现的。

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