Spray pipe for fixing thermal shrinkage label

Abstract

The invention discloses a spray pipe for fixing a thermal shrinkage label, and belongs to the technical field of filling equipment, the spray pipe comprises a main pipe provided with a main flow channel, the main pipe is provided with a first air injection hole communicated with the main flow channel, the main pipe is provided with a boss protruding upwards in an inclined mode, the first air injection hole is formed in the boss, and the spray pipe further comprises a branch pipe connected to the bottom of the main pipe. The branch pipe is provided with a branch flow channel and a second air injection hole, one end of the branch flow channel communicates with the main flow channel, the other end of the branch flow channel is closed, and the second air injection hole communicates with the branch flow channel. The liquid water beads formed by cooling are mainly distributed on the outer wall of the main pipe, so that the liquid water beads can be prevented from blocking the first gas spraying holes, the spraying amount of the high-temperature gaseous spray at the first gas spraying holes is ensured, meanwhile, the liquid water beads are prevented from being sprayed to the thermal shrinkage label, and the thermal shrinkage effect of the thermal shrinkage label is improved. During working, the second gas spraying holes and the first gas spraying holes spray high-temperature gaseous spray at the same time, so that the thermal shrinkage label can be uniformly heated and shrunk, and the thermal shrinkage effect of the thermal shrinkage label can be improved.

Description

technical field [0001] The invention relates to the technical field of filling equipment, in particular to a nozzle for fixing heat shrinkable labels. Background technique [0002] The outside of the cup body of the existing canned food is generally fixed with a label. Due to the different materials of the label, the combination between the label and the cup body can generally be divided into two types: thermoplastic lamination and heat shrink lamination. In the thermoplastic bonding method, the label is placed in the mold cavity of the cup body in a curled state before the cup body is extruded. When the sheet is heated and extruded in the mold cavity to form the cup body, the label is heated and attached to outside of the cup. In the heat shrink bonding method, the cup body has been formed, the continuously arranged labels are cut into smaller labels and sleeved on the outside of the formed cup body, and then the label is heated to make the label stick to the outside of th...

AI Technical Summary

Problems solved by technology

[0003] In the existing production, when the label is heat-shrinkable and bonded, it is generally heated by spraying a high-temperature gaseous spray through the nozzle. Since the nozzle hole is directly opened on the nozzle pipe, the cooling liquid water droplets formed on the outer wall of the nozzle are easy to block the nozzle hole. , which will lead to a decrease in the amount of high-temperature gaseous spray, which will affect the heat shrinkage effect of the label

In addition, when the high-temperature gaseous spray is sprayed from the nozzle hole, the liquid water droplets will be sprayed to the label. Due to the high temperature of the liquid water droplets, the part of the label is easily heated and wrinkled under the action of the liquid water droplets, which seriously affects the label. Shrink effect

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