荫罩成型模一般必须在试模合格后交货,但是由于试模压机和实际生产使用的压机精度有差别,模具的磨损,生产场地的灰尘状况,材料性能的变化等原因会产生各种问题。模具使用中易产生的问题及其对策汇总如下。一、问题及其对策 1.产生凸包。在荫罩曲面上局部有凸包(见图35)。原因是:凸模或顶板曲面上有异物;毛坯 Shadow mask molding die must generally be delivered after the test pass, but due to the difference between the accuracy of the test press and the actual production of the press, wear and tear of the mold, the dust of the production site conditions, changes in material properties and other reasons will produce a variety of problem. Easy to use mold problems and countermeasures summarized below. First, the problem and countermeasures 1. Produce convex hull. There is a convex hull locally on the shadow mask surface (see Figure 35). The reason is: punch or the top surface of the foreign body; rough