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The Food Equipment Industry Exhibition was held alongside a special symposium on food quality and safety detection technology, gathering professionals from the upstream and downstream sectors of the food equipment industry chain. Shanghai Weixian Detection Equipment Co., Ltd. showcased its X-ray foreign object detection systems, metal detectors, and automatic checkweighers at the supporting exchange activities of the exhibition. Relying on this industry exhibition and technical exchange event, the company focused on the three core needs of the canned food industry—foreign object detection, seal integrity inspection, and weight control—sharing industry technical solutions and practical application experiences with the attending representatives.
Shanghai Weixian Detection Equipment Co., Ltd. is located in the Shenmin Overseas Returnees Science and Technology Park in Minhang District, Shanghai. As a national high-tech enterprise, it possesses nearly 20 years of professional industry experience and a rich portfolio of intellectual property in the field of X-ray foreign object detection, focusing on providing high-precision X-ray detection systems, metal detectors, and automatic checkweighers.
Canned food is an important export category in China's food industry and has long held a significant share in the global market. China is the world's largest producer and exporter of canned food, with its production accounting for a quarter of the global total and export trade volume exceeding 35%. According to China Industry News, the scale of China's canned food industry reached 101.8 billion RMB in 2025, and is expected to maintain a growth rate of 6% to 8% from 2026 to 2028.
Along with the continuous growth of the industry scale, food safety regulatory requirements are becoming increasingly stringent. According to China Industry News, in March 2025, the National Health Commission and the State Administration for Market Regulation jointly issued GB7098-2025 "National Food Safety Standard for Canned Food," which will be officially implemented on March 16, 2026, comprehensively replacing the 2015 version of the old standard. The new national standard makes clear provisions on the sealing performance of canned food containers, requiring the packaging containers to be perfectly sealed, with no leakage and no bulging (swelling), while also requiring the contents to be "free of foreign impurities visible to the naked eye."
The implementation of the new standard imposes rigid compliance requirements on canned food production enterprises in the aspects of seal integrity detection and foreign object screening. Canned products include various packaging forms such as metal cans, glass bottles, and soft packaging retort pouches. The detection difficulties vary for products of different materials, and traditional detection methods are difficult to cover all application scenarios. In this context, X-ray detection equipment and metal detection equipment play an important value.
X-ray detection relies on the density difference images formed after X-rays penetrate the food and packaging containers to identify foreign objects or packaging defects with a higher density than the contents. Compared with traditional metal detection, X-ray detection can identify various foreign objects such as metal, glass, ceramics, hard plastics, stones, and bones, and the detection effect is not interfered by factors such as product temperature, humidity, and salt content.
In the canned food industry, X-ray detection equipment has multiple typical application scenarios. During the production of glass bottle canned food, bottle collisions and filling processes can easily lead to broken glass mixing into the contents. X-ray detection equipment identifies glass impurities based on density differences. However, the thick bottom, side walls, and neck of glass bottles are prone to forming detection blind spots, and the shape and position of pollutants are uncertain, which requires the detection system to have multi-angle imaging capabilities.
The seam structure of metal cans directly determines the commercial sterility level of the canned food. Traditional seam detection relies on destructive sampling, which has limited sampling frequency on high-speed production lines and can only check a small number of cross-sections. X-ray detection provides a non-destructive online detection solution. The X-rays penetrate the seam area of the metal can to identify abnormal structures such as poor overlap and sealing defects at the seal, enabling can-by-can online inspection.
During the production of soft packaging retort pouch canned food, sealing edge material entrapment is a common quality defect. X-ray detection can identify quality problems such as sealing edge material entrapment and unsealed edges by recognizing density anomalies in the sealing area. At the same time, for metal cans, glass bottles, and soft packaging canned food, X-ray equipment can penetrate the packaging to screen for foreign objects such as metal fragments, stones, bone slag, and high-density hard plastics in the contents, and link with rejection mechanisms to automatically reject defective products.
Metal detectors, on the other hand, build a specialized detection defense line against metal foreign objects. Relying on the principle of electromagnetic induction, they maintain high detection sensitivity for metal foreign objects such as iron, stainless steel, copper, and aluminum. The metal can body itself will interfere with the electromagnetic field, so metal detectors are more applied to the production line detection of glass bottle canned food and soft packaging canned food, as well as the screening of metal foreign objects at the raw material end. Shanghai Weixian's multi-frequency vertical metal detector is specifically developed for bottled and canned products. The system has five built-in operating modes: dry, wet, heavily wet, wet with salt, and aluminum foil packaging, adapting to diversified production conditions. The learning process for new products takes only 20 seconds.
In actual production line applications, metal detectors and X-ray machines are often used in combination. The metal detector is responsible for high-sensitivity metal foreign object screening, while the X-ray machine covers multi-category foreign object detection and sealing defect detection. The combination of the two sets of equipment takes into account both detection accuracy and cost efficiency.
Seal integrity is a core indicator of canned food safety, and the new national standard GB7098-2025 imposes rigid constraints on container sealing performance. In response to the sealing detection needs of bottled and canned products, Shanghai Weixian has developed a dedicated X-ray detection solution. The single-view bottle and can X-ray inspection machine adopts single-ray source horizontal projection imaging technology, which can stably detect tiny foreign objects such as 0.3mm stainless steel balls, 0.2×2mm stainless steel wires, and 1.0mm ceramic glass balls. Building on this, the company has also introduced a single-ray oblique detection technology. A single X-ray source splits into a horizontal ray and a customizable oblique ray. The oblique ray penetrates the bottom of the container, eliminating the bottle bottom detection blind spot existing in traditional detection.
To meet the needs of dual-view detection, Shanghai Weixian's dual-view bottle and can X-ray inspection machine is equipped with dual-ray source and dual-detector box synchronous imaging technology. The two beams of light penetrate the bottom and side walls of the container from different angles, eliminating detection blind spots and identifying non-metallic and metallic pollutants in difficult-to-detect areas. It is suitable for detection scenarios such as Tetra Pak packaging, tubular containers, large-diameter plastic containers, metal cans, and round or polygonal glass jars.
In terms of weight control, the X-ray checkweigher integrates foreign object detection and dynamic weighing functions. It completes the weight detection of a single can while screening for foreign objects, ensuring that the filling volume meets the standards. Shanghai Weixian's X-ray checkweigher can simplify production line equipment configuration, reducing equipment investment and on-site footprint.
Shanghai Weixian Detection Equipment Co., Ltd. is a national high-tech enterprise and a "Specialized, Refined, Differential, and Innovative" (SRDI) enterprise in Shanghai. The core team has been deeply engaged in the field of X-ray intelligent detection for nearly 20 years, possessing an 8,000-square-meter modern R&D and production manufacturing base, with R&D personnel accounting for more than 40%. The company adheres to the product concept of "R&D in China, Quality for the World" and provides high-precision detection solutions for the food and pharmaceutical industries.
Shanghai Weixian's product matrix includes X-ray inspection machines, metal detection machines, automatic checkweighers, and metal detection and weighing integrated machines. The products are widely used in segmented food industries such as pet food, prepared dishes, leisure food, canned food, baking, dairy products, meat products, aquatic products, and fruits and vegetables.
At the core technology level, Shanghai Weixian has independently developed the XDET Smart Eye Algorithm Platform. Relying on a new neural network AI model, it possesses fully automatic learning capabilities. Customized standard AI algorithms can complete training within 15 seconds, targetedly improving detection accuracy. Multispectral imaging technology integrates visible light images with X-ray images, achieving higher sealing positioning accuracy and enabling the detection of ultra-thin plastic bag seals, adapting to packaging integrity detection under various complex working conditions. Dual-energy detection technology simultaneously generates low-energy and high-energy images, improving the detection capability of medium and low-density foreign objects through image recognition and comparison algorithms.
In terms of qualifications, Shanghai Weixian has obtained the national high-tech enterprise certification, A-level taxpayer status, and the title of "Specialized, Refined, Differential, and Innovative" enterprise in Shanghai. It has passed the ISO9000 and ISO9001 quality management system certifications and SGS-CE certification. As one of the main drafting units, the enterprise deeply participated in the formulation of the group standard "Technical Requirements for X-ray Automated Detection Equipment," covering core clauses such as equipment automation performance, safety specifications, and test methods. In the field of intellectual property, Shanghai Weixian holds 42 patents, including 16 invention patents, 23 utility model patents, and 3 design patents, as well as 30 software copyrights.
In terms of customer service, Shanghai Weixian has provided detection equipment and supporting technical services for numerous food enterprises. The equipment has been implemented in the standardized production lines of multiple enterprises, accumulating rich industry landing cases. The service network covers all provinces, autonomous regions, and municipalities in China, extending to the Hong Kong, Macao, and Taiwan regions, and expanding to overseas markets in East Asia, Southeast Asia, South Asia, North America, Europe, Oceania, the Middle East, Latin America, and Africa, providing localized equipment and technical support for global canned food export enterprises.
The safety standards in the canned food industry continue to upgrade. With the implementation of the new national standard GB7098-2025, more explicit control requirements have been put forward for seal integrity and foreign object management. As core equipment for foreign object detection and quality control, food X-ray machines and metal detectors help canned food production enterprises transition from sampling to 100% inspection, and upgrade from manual detection to intelligent online detection. Whether it is broken glass detection for glass bottle canned food, seal integrity detection for metal cans, sealing detection for soft packaging canned food, or weight consistency control for various canned products, selecting appropriate detection solutions and reliable equipment partners is an important support for ensuring food safety and maintaining brand reputation. Relying on this exhibition and special symposium, Shanghai Weixian has showcased its X-ray intelligent detection equipment to the industry, continuously providing foreign object detection and sealing quality control supporting solutions for food manufacturing enterprises.
Sources
- China Industry News (2026-10-15) - Original link: Food Equipment Industry Exhibition | Shanghai Weixian Showcases X-ray Foreign Object Detection Equipment and Interprets Quality Control Solutions for Canned Food - https://www.cinn.cn/hz/2026/10-16/ZkmbO231.html#1