PLC控制的新型气动式调墨系统

New Pneumatic Ink Regulating Machine Controlled by PLC

针对印刷机传统调墨斗人工调墨精度低、消耗人力物力的缺陷,以及电动式调墨系统机械结构复杂、机械部件易磨损、设备成本高等缺点,提出了一种PLC控制的气动式调墨系统。采用调墨轮替代了传统调墨系统的墨刀,设计出通过气压调节调墨轮和墨斗辊之间的间隙的新型调墨方式;设计了气动式气管道结构并介绍了气动过程;采用光电编码器编码原理和PLC高速计数器的计数原理,设计出将各墨区墨量数字化的方法;设计制造了气动式调墨系统样机并进行了调墨测试。试验证明该气动式调墨系统调墨准确可靠,提高了调墨效率,节省了调墨时间,具有可行性和实用性。

In view of the defects of low regulation accuracy and high resources cost on traditional ink regulating machine of the printing press, as well as the disadvantages of complication of mechanical structure, tendency of being worn, and high equipment cost on electric-drive ink regulating system, a new pneumatic ink regulating machine controlled by PLC was put forward. By using ink wheels instead of the traditional doctor blade, a new ink regulating method was designed, which was regulating the clearance between the ink wheels and ink fountain roller through air pressure. The structure of gas pipeline was designed, and the pneumatic process was introduced. Using the photoelectric rotary encoder and HSC of PLC, a new method of digitizing inking amount was designed as well. And on this basis, a prototype was made and tested, and the test result proved the feasibility and practicability of this new machine.