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塑料教具在中小学实验教学中发挥着重要的作用,因而掌握塑料的加工技巧十分重要。下面,笔者介绍几种简单的加工方法,以飨读者。一、塑料的冷切割较薄的塑料较脆,不能用锯条锯割,对此可将废钢条折断后用其锋利处作为切割刀刃(或用刻刀)沿刻线挡尺反复刻划几次,直至板面出现一道深痕,再翻过来,在同一部位划一道深痕。然后,将塑料板移至桌边,轻轻向下一扳,即可沿划线断开。其示意图见图1。
Plastic teaching aids play an important role in experimental teaching in primary and secondary schools, so it is very important to master plastic processing skills. Below, I introduce several simple processing methods to readers. First, the cold plastic cutting Plastic thinner than the crisp, can not be sawing with a saw blade, which can be broken after the use of sharp steel bar as a cutting edge (or with a knife) along the graduated engraving ruler repeated several times Until a deep mark appears on the surface of the plate, turn over again and draw a deep mark on the same part. Then, the plastic plate to the table, gently pull down a plate, you can disconnect along the scribe. The schematic diagram shown in Figure 1.