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确定冒口尺寸及数量的方法有好几种。现介绍目前生产中最常用的一种——热节圆法,又称比例法。热节圆能反映出铸件冷却的快慢程度,热节圆愈大冷却愈慢;反之,冷却就愈快。热节圆法设计冒口是根据被补缩处的热节圆直径,按经验以一定比例放大,而得到所求的圆柱形冒口直径或腰圆形冒口宽度。用热节圆法设计冒口的最大优点是计算过程简单,其缺点是确定冒口和热节圆比例时要有一定的实践经验。否则,若比例取得不当,冒口尺
There are several ways to determine the size and number of risers. Is now introduced in the production of one of the most commonly used - hot festival round method, also known as the ratio method. Thermal festival can reflect the degree of cooling of the casting extent, the greater the festival pitch cooling more slowly; the other hand, the faster the cooling. Hot section design round faucet is fed according to the hot section of the diameter of the circle, according to experience a certain percentage of amplification, and get the desired diameter of the cylindrical riser or rounded waist riser width. The biggest advantage of the design of riser with hot pitch method is that the calculation process is simple. The disadvantage is that there must be some practical experience in determining riser and hot pitch ratio. Otherwise, if the proportion of improper, riser feet