压铸时,动型随曲肘机构产生开型力和合型力。合型力防止压型被涨开。正是这个合型力,使机器的四根大杠受到拉伸。只有四根大杠上的拉应力相等时,压型闭合才最可靠,相反,有一根大杠上的拉应力稍大,铸件就会产生飞边,有时会出现金属飞溅。还由于这根大杠调整得不好,致使合型力建力缓慢,使压型不能很快闭合。 Die casting, dynamic type with the toggle mechanism to produce open force and closing force. Co-force to prevent the pressure is up. It is this combined force that stretches the four bars of the machine. Only four big bar on the same tensile stress, the pressure closure is the most reliable, on the contrary, there is a large bar on the tensile stress slightly larger, castings will have a flash, sometimes there will be metal splashes. Also due to the adjustment of the big bar is not good, resulting in a slow build-up force, so that the pressure can not be closed soon.