Electronic automatic quantitative packaging machine

The QB4 type packaging machine used by Zhongyan Xingan Salt Chemicals Co., Ltd. (produced by Shandong Yantai Pneumatic Component Factory). Self-flow twice feeding method, lever type mechanical weighing, and the circuit composed of proximity switches and relays are used for quantitative control. Due to mechanical transmission, wear, and vibration of the lever, frictional resistance, and the special environment of the salt manufacturing company, the drive part easily accumulates dust and salt scale, causing serious corrosion of mechanical parts and increased wear of the knife edge, which results in an increase in errors. A bag of 50l (g bagged product salt, the weighing error sometimes up to several kilograms. To this end, the salt packaging machine was technologically modified, it was changed to electronic automatic quantitative packaging machine, in addition to retaining the original machinery The rest of the platform and bag holder device were redesigned and manufactured.

Electronic automatic quantitative packaging machine is mainly composed of mechanical and electronic automatic control of two major components. The mechanical parts mainly include flow regulating feeders, material gates, weighing hoppers, bag holders and sensor seals, suspension devices, air control boxes, and junction boxes. All parts and bodies are made of A/S~I6L stainless steel. The material gate mechanism adopts a double-link linkage structure, which is sensitive and reliable in action and easy to adjust. The weight sensor and weighing hopper are mounted by special bearing suspension; the pneumatic actuator adopts high-speed cylinder with buffer and no oil lubrication to ensure the actuator. Fast and stable operation, reducing noise and prolonging service life; Solenoid valve adopts ultra-thin two-position five-way valve to make the structure more compact; sensor box, junction box, and air control box adopt sealed and dustproof design respectively, avoiding The impact of the harsh environment on site.

The electronic automatic control part mainly includes a weighing controller and its software, a weight sensor. Weighing controller adopts embedded structure, fully sealed dustproof and anticorrosive shell design, and adopts large-scale integrated digital circuit inside and modular design. Mainly by the A / D module (including amplifier circuit), microprocessor module, I / Q module, display, keyboard and other components. The entire circuit is simple in structure, high in reliability, and easy to repair and overhaul. In addition, the controller has low power consumption and small heat generation, so the failure rate is low and the service life is long. Weighing controllers use digital filtering and watchdog technologies, which have very good anti-jamming capability and guarantee stable and reliable operation in areas where the electromagnetic field is very strong. The controller has functions of automatic zero tracking, automatic peeling, impulse suppression, accuracy self-checking and automatic fall correction. In addition, fault self-check and multi-recipe solutions have been added to make fault judgment easier and easier to switch between different package specifications.

The electronic automatic quantitative packaging machine was successfully put into operation in March 2000. It has been used up to now and has achieved good results. The qualified rate of weight reached 100%, the precision was controlled within 0.2%, and the packing speed reached l2 l5 packs per minute.

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