Generally, during the processing of frozen fruit and vegetables, it is likely for the frozen products to be polluted by metal foreign matters such as iron in the production line. Thus, it is of necessity to have metal detection before delivery to customers.
Generally, during the processing of frozen fruit and vegetables, it is likely for the frozen products to be polluted by metal foreign matters such as iron in the production line. Thus, it is of necessity to have metal detection before delivery to customers.
Based on various vegetable and fruit materials and their application, frozen fruit and vegetable products are in different shape and state. One common way for vegetables to get quick-frozen state is to frozen the product in block. Such frozen fruit and vegetables can get better detection performance by means of metal detectors; while other frozen fruit and vegetables detection can take advantage of X-ray inspection system due to the poor uniformity.
Online detection and packaging detection: after the completion of the single freezing machine, generally, frozen fruit and vegetables can be detected on plates or after packaging.
Metal detector: according to the efficiency of the single freezing machine, product effect of general frozen vegetables will not influence the detection accuracy.
X-ray inspection system: X-ray inspection systems have better detection performance when it comes to uneven frozen products. X-ray inspection system, with air-blowing rejecters, achieves progress in detecting stone and glass.
Checkweigher: the weight checking machine is widely used for weighing the products before entering into market. For example, the mixed frozen vegetable can be checked the weight at the end of the production line.
Take canned fruits and vegetables & fruit and vegetable juice as example.
With the faster pace of modern life, demand of foods that can be used instantly or by simple processing is increasingly rising. Canned vegetables and fruit are in the trend. Conventionally, we usually use canned glass or canned metal according to what the canned material is. The foreign matter risk of canned glass is the glass slag caused by the glass breaking in the process of capping, which is called the glass detection in the glass tank; and the canned metal also has a problem of metal mixing in the sealing, which is what we call the metal detection in the metal tank.
Online detection: the canned glass can be detected with a metal detector without a metal cover.
Metal detector: detection before capping; fruit and vegetable juice can choose sauce metal detector for online detection.
X-ray foreign body inspection system: For the covered glass cans and metal cans, dual-energy X-ray inspection system can get better metal detection accuracy and other hard foreign body detection. In the actual production process, the contact with the foreign body is not necessarily spherical, may be glass fragments, more may be sheet-shaped. Therefore, the use of multi-angle detection can improve the detection rate of dangerous foreign bodies.
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