The application of PLC in plastic welding machine

The application of PLC controller in plastic welding machine newmaker welcome to e exhibition hall 9 plastic welding machine/showroom in plastic welding machine, welding machine ultrasonic welding machine, plastic welding torch, welding machine, plastic. 。 。 This paper introduces the application of PLC controller in the welding machine. Analog input module of PLC controller plug and play a dozen yuan precision processing of the single polarity detection position. Its stable performance, strong anti-interference advantages have a significant advantage in such ultrasonic heating equipment. Key words: analog; Single polarity; Ultrasonic a 1, project profile. Introduction to industry when ultrasonic wave ACTS on the thermoplastic plastic contact, will produce tens of thousands of times per second, the high frequency vibration, this reaches a certain amplitude of high frequency vibration, through the weldment sends the ultrasonic energy to the welding area, due to the welding area is two welding interface of the acoustic resistance is big, so can produce local high temperature. Again due to poor thermal conductivity of plastic, can't timely send out for a while, gathered in welding area, the two plastic contact rapidly melting, coupled with a certain pressure, make its merging into one. When ultrasonic stop function, to keep the pressure for a few seconds, make its solidification molding, forming a strong chain, achieve the purpose of welding, the welding strength can close to the raw material strength. Good or bad depends on ultrasonic plastic welding welding head, the amplitude of the three factors such as the pressure and welding time, welding time and welding head pressure can be adjusted, amplitude is determined by the transducer and amplitude. The three interaction has a good value, the amount of energy more than appropriate value, the amount of melting plastic is big, the welding material easy to deformation; If energy is small, it is not easy to weld, the applied pressure is not too big. Is the best pressure welding part of the edge length and the best product of pressure per 1 mm. Welding technology is widely used in the auto industry, electronic industry, medical industry, household appliances industry, non-woven clothing, office supplies, packaging industry, toy industry, etc. 1. 2 customer requirements using photoelectric switch to control the feed plate and, buffer, the buffer. Utilization of the engineering conversion of analog value by the touch screen to set the highest lowest when processing products, abnormal position, work location, etc. Have the installment payment function. 1. Three solutions to chose FBs - in this case 40 ma host, FBs - B4AD simulation quantity expansion board, a black silk ribbon through touch screen. 1. 4 the solution context FBs - B4AD has four road 12 yuan analog input channel, the user can choose according to need of 0 ~ 10 v or 0 to 20 ma analog signals. FBs series PLC host the advantages of stable performance, strong anti-interference completely suitable for this kind of high frequency heating equipment. 1 the control core of the FBs - hardware configuration equipment 40 ma a host, the host performance is stable, strong anti-interference, stand-alone analog can be expanded to a maximum of 64 road. Host comes with a RS232 communication port, except as a programming port can also be used as a machine or other equipment from the station. Man-machine interface adopted a nylon tong MT8070iH touch screen, the machine USES 16 k color high color TFT LCD, with 800 x 480 resolution. 2 control process design according to the requirements of the client control technology, equipment and automatic break up two kinds of control mode. Manual operation can be manually controlled the origin return, feeding plate and upper and lower mould fluctuation pressure. Automatic state, start to run automatically, lower die first origin place, at the same time feeding plate automatic feeding point. Are obtained according to start the feed plate to fast forward, first met forward buffer after the photoelectric switch, open the buffer valve, let the feed plate at low speed after putting in place before send, upper die down, pressure on the lower die. When the spacing to setting of the two modules, two die position setting time. Upper die back to set, to set a lower die sinking, feed plate back welding. Workpiece is put back in place after, need to press start again, a second processing equipment can only be. In automatic mode, if have a touch screen safety switch, system will stop. The following is a control process flow diagram. Figure 2 - 1 control process flow diagram 2. 3 software design because equipment of the process is simple, so this case used in one of the most common reset to complete equipment control process. Figure 2 - Part 2 processes using linear order to engineering conversion mode the current drawing 2 - up and down 3 engineering transformation, equipment debugging program debugging is simple, but the equipment and the effect of the corresponding buffer valve cylinder is in the beginning of the machine has not obvious, finally, in cooperation with the master, the cylinder and the cushion valve opening first debugging, after appropriate equipment running normally. Four, application experience according to ask the teacher to understand individual, most of the welding machine process basic similar, not just of the same kind some size to appear on the market and mechanical architectural differences, the industry belong to the non-standard equipment for mechanical structure, but for application development, close to belong to the marking machine.
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