1results about How to "Avoid polishing" patented technology

This invention relates to an automated production line for a closed flat baking pan. The invention includes a corner-punching mechanism, comprising a lower corner-punching die and an upper corner-punching die that can move up and down relative to the lower corner-punching die. The upper and lower corner-punching dies work together to punch a rectangular blank into a first semi-finished product with four arc-shaped corners. A flanging mechanism, comprising a lower flanging die and an upper flanging die that can move up and down relative to the lower flanging die, works together to fold the circumferential edge of the first semi-finished product, forming a second semi-finished product. A pre-forming mechanism is used to bend the folded edges of the second semi-finished product inwards to form folded edges, forming a third semi-finished product. A flattening mechanism, comprising a lower flattening die and an upper flattening die that can move up and down relative to the lower flattening die, works together to flatten the circumferential folded edges of the third semi-finished product, obtaining a shaped baking pan. This invention eliminates the need for welding and polishing in the production of closed flat baking pans, thus improving production efficiency.