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上、下牛球(图1)是两个技术条件要求较高的压延件,其主要要求是:1.成型后的内外表面不允许有超过公差范围的皱纹;2.成型后的最小壁厚不小于3.7公厘;3.压延件割边后的重量不超过45公斤。根据上述技术要求,本应采用有压边圈的压延方法。值限于设备,只能采用一般的压延方法代替,其胎具的构造如图2所示。我厂的水压机为下动式。
The upper and lower bovine ball (Figure 1) are two calendering pieces with higher requirements of technology. The main requirements are as follows: 1. The inner and outer surfaces after the molding are not allowed to have wrinkles exceeding the tolerance range; 2. The minimum wall thickness after molding Not less than 3.7 mm; 3. The weight of the calendered piece after cutting does not exceed 45 kg. According to the above technical requirements, this should be used with blank holder rolling method. The value is limited to equipment, can only be replaced by the general calendering method, the structure of the tire shown in Figure 2. I plant the hydraulic press for the next move.