Based on the PLC rotary filling machine control system design
Abstract：The foodstuff machinery serves the whole food industry, and the about 70 percentof
packing machinery serves the foodstuff packaging, especially, beverage industryrapidly develops
recently so that there is an increased demand for liquid fillingequipment. There is a new tendency
among the packaging equipment of America andJapan towards the direction of high efficiency, high
accuracy, and high automation.Domestic packaging machinery developed late, and it principally used
thedevelopment mode of import-absorb, although it can meet the demand for production,the
technology content is low, especially, it hardly applies advanced technology suchas photo, magnetic
and computer and so on. Therefore, there is a great gap betweenthe packaging accuracy and
stability of the domestic packaging machinery and theoverseas equipment.
The thesis emphasizes on researching on the control system of XG-24128 ― rotaryfilling
machine which integrates washing, filling and spinning caps. The machineryfills the 500ml pet bottle
at a speed of 18000BPH, the efficiency of single tip sealinglid can reach 2000-2200 bottle/hour, and
the blunder of filling capability isn't morethan 3%o, so that it can maintain high accuracy and stability
at high speed, moreover,the automatic production can reach the goal ― no bottles no filling, no
stopper.Meantime, the thesis also research the key technology of XG-24128 that the fillingsection
uses one servo pump to control two tips filling fluid in order to improve thefilling speed and continuous
filling.
Firstly, this article designs the program of control system. On the basis ofresearching the
whole structure of XG-24128, it analyses the process flow of thefilling and determines the whole
program of the control system of filling machineaccording to the demand of design.
Secondly, this article defines the hardware collocation of control system. Itdetermines the
type and correlation module of PLC, defines the I/O in light of theprocess requirements and
equipment status of filling machinery, and selects andarranges such electrical sections as servo and
feeler search.
Furthermore, the article researches the key technology of XG-24128 that thefilling section
uses one servo pump to control two tips tilling fluid in order to improvethe filling speed and continuous
filling, analyses how to locate the tips filling fluidduring the continuous filling, distributes the speed of
filling, and researching thereverse mechanism.
Finally, the paper designs software of control system of XG-24128 filling machineon basis of
hardware collocation. On basis of analyzing control procedure it draws uprelevant programs and
system software with a view to achieving the filling process.While designing software it tries to design
HMI of the filling machine.
Key words: Filling machine, PLC control, Servo pump, Kinesis control, Continuousfillin
