Freezing spiral net chain structure

A freezing spiral net chain structure, comprising:

• a plurality of chain links;
• wherein
• the plurality of chain links are successively arranged in a travelling direction of a rail, wherein transmission teeth are arranged at inner ends of the plurality of chain links, and engagement teeth are arranged at two sides of each of the plurality of chain links, wherein engagement teeth of adjacent chain links of the plurality of chain links are engaged with each other, axial holes are disposed between the engagement teeth of the adjacent chain links, and a plurality of rotary shafts are inserted into the axial holes, wherein a metal piece is connected between outer ends of two adjacent rotary shafts of the plurality of rotary shafts,
• the metal piece is made of a stainless steel or an aluminum alloy, and
• the stainless steel is 304 stainless steel.

A freezing spiral net chain structure, comprising:

• a plurality of chain links;
• wherein
• the plurality of chain links are successively arranged in a travelling direction of a rail, wherein transmission teeth are arranged at inner ends of the plurality of chain links, and engagement teeth are arranged at two sides of each of the plurality of chain links, wherein engagement teeth of adjacent chain links of the plurality of chain links are engaged with each other, axial holes are disposed between the engagement teeth of the adjacent chain links, and a plurality of rotary shafts are inserted into the axial holes, wherein a metal piece is connected between outer ends of two adjacent rotary shafts of the plurality of rotary shafts,
• a pitch of the metal piece after freezing shrinkage is less than a pitch at a position corresponding to the metal piece on a plastic spiral conveying net chain after cold shrinking.