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七十年代,丹麦DISA公司的垂直分型自动高压造型机具有高效、高自动化的特点。该机六工位的控制是由傍磁电机驱动机械分度定位,以凸轮控制四组液压换向阀。但由于机械分度定位比较复杂,以后在生产中改成六只限位开关圆周布置,以傍磁制动电机驱动一转动撞块,每转动60度为一工位,再由两组凸轮分别控制气动换向阀和液动换向阀组的瞬时位置,实现自动循环。利用电器代替了机械分度,大大简化了机构。但是由于使用了傍磁制动电机,当造型机以4～6min~(-1)的频次运转时,电机平均每分钟就要启动和制动24～36次。同时,由于造型机是连续作业,因此极易升温发热,进而烧坏绝缘层,这一现象在夏季环境温度高时尤为严重。
Seventies, Denmark DISA’s vertical parting automatic high-pressure molding machine with high efficiency and high automation features. The six-station control of the machine is by Pong magnetic motor driven mechanical indexing position to cam control four sets of hydraulic valve. However, due to mechanical indexing more complex positioning, later in the production into a six limit switch circular arrangement, with the magnetic brake motor to drive a rotating block, each rotating 60 degrees as a station, and then by two sets of cams respectively Control the pneumatic valve and hydraulic reversing valve instantaneous position, to achieve automatic cycle. The use of electrical machinery instead of indexing, greatly simplifying the body. However, due to the use of Pong magnetic brake motor, when the molding machine to 4 ~ 6min ~ (-1) frequency of operation, the motor will start and brake an average of 24 to 36 times per minute. At the same time, because the molding machine is a continuous operation, it is easy to heat up and then burn out the insulation layer. This phenomenon is especially serious when the ambient temperature in summer is high.