What are the functions of tinplate inner coating? Tips for making tinplate lids Coating purpose and requirements Tinned plate, chrome plated and aluminum alloy thin plate made of cans are susceptible to corrosion and cause the contents to deteriorate. Therefore, most food cans require coatings inside the cans. Different food cans have different coating requirements. […]
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1. The main factors affecting the quality of welds Resistance welding uses the thermal effect of current, that is, when the current passes through two metal plates to be welded, they are melted due to the high heat generated by the resistance on the welding circuit, and combined by pressure and cooling. Welding resistance consists […]
1.Iron tongue: due to poor sealing, smooth tongue protruding at the lower edge of the crimping edge. It can appear at any point along the crimping edge, but usually at the seams, where the body hook and cover hook overlap badly, or the cover hook is insufficient. It is main defect when the iron tougue>1.27 […]
Since 1978, with the development of electric resistance welding (Super-WIMA) in the can-making industry, the overlap of can welds has been reduced to 0.4-0.6mm, and lead-free resistance welding tin-plated cans have been widely used For food cans and beverage cans, this transformation greatly improves the overall quality of the can body weld lap. In order […]
After sterilization and cooling, canned food must be inspected after heat preservation or storage to measure whether its indicators meet the standards and commodity requirements, and determine the quality and grade of finished products. There are many inspection items and methods. Here are a few. 1. Appearance inspection: the key point of appearance inspection is […]
1. The name of each part of the first curling 1. The thickness of the first curling (Tc) The thickness of the first curling refers to the thickness of the curling section after the can lid and the body are fitted, and the first rolling wheel is crimped to complete the first curling. The thickness […]
The seaming inspection must not only observe the corrugation on the hook part of the cover and measure the external data, but also observe the shape and position of the body hook and cover hook in the seaming cross-section. According to experience, it is absolutely not necessary to take the data measured on the outside […]