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讀者同志們,你們知道共有几种制造鑄件的方法嗎?如果不知道,請你們看看这一期的封底,这里画出了八种鑄造的方法。用途最广的是砂型鑄造法(图1)。不論是什么形狀、多大尺寸的鑄件,也不論是只生产一个或者要生产成百成千个,都可以采用这种方法。不过这种方法也有缺点,比如鑄件質量不是很好、型砂消耗量很大等等。我們可以用金屬的鑄型来代替砂型,这就是金屬型鑄造法(图2)。用这种鑄造法可以提高劳动生产率,少用或者不用型砂,而且一个鑄型能用許
Readers, do you guys know that there are several ways to make castings? If you do not, please look at the back cover of this issue and here are eight ways of casting. The most widely used is the sand casting method (Figure 1). No matter what shape, size and size of the castings, whether it is only one or to produce hundreds of thousands of production, can use this method. However, this method also has shortcomings, such as casting quality is not very good, a large sand consumption and so on. We can use the metal mold instead of sand, which is the metal casting method (Figure 2). With this casting method can improve labor productivity, less or no sand, and a mold can be used