Application and Development of Online Multihead Weigher

Author: Smartweigh–Multihead Weigher

Multihead weigher, also known as online multihead weigher, also known as multihead weigher or online sorting machine, is a medium-low speed, high-precision online checkweighing equipment, which can be integrated with various production lines and conveying systems, and is mainly used for online detection of product weight Whether it is qualified, whether there are missing parts or product weight classification in the package. Online check weighing has gradually become an indispensable link in the current industrial production, especially in the production process of food and pharmaceutical industries. The multihead weigher is compared with the preset range, and the control unit issues instructions to reject products with unqualified weight.

At present, the large-scale production of multihead weigher in my country is just in its infancy, and new national standards and verification procedures are being formulated in line with OIML-R51. Some domestic enterprises mainly produce large-scale multihead weighers for the chemical logistics industry. For small-scale, small-scale multihead weighers, most domestic enterprises are in the imitation stage due to high technical difficulty and too small division value. Since the multihead weigher is used on the packaging logistics online quality inspection line, in order to achieve the highest production efficiency, it is required that the product measurement passing speed can reach up to 100~300 times/min, and the highest detection accuracy can reach 0.2g. For different inspected The size of the item and the measurement speed can automatically determine the appropriate screening and measurement time; when the ROM/RAM, A/D, photoelectric device, communication, etc. are abnormal, it will prompt and take measures to realize automatic adjustment and self-diagnosis functions.

At the same time, it has ARC NET and ETHERNET network communication functions, so that the system can realize centralized control with the computer combined scale in the previous process, as well as remote control operation and process feedback control. In recent years, the products tend to be more compact and multi-functional, and the multihead weigher application integrates metal inspection, X-ray foreign body inspection and sorting. At present, general metal inspection can detect metal foreign objects of 0.8~1mm, and the inspection speed can reach 40~60m/min. Since metal detectors cannot detect foreign objects such as hair, thread ends, bones, glass, etc., the latest X-ray The application of the foreign body checker was born, and the highest detection speed can reach 65m/min. At present, countries around the world have begun to further expand the function of the multihead weigher to the automatic management system of storage and packing. , radio frequency automatic identification coding, shape pattern recognition processing and other technologies integrated transportation testing equipment has been widely used in logistics and transportation management systems.

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