Thermal shrinkage tube dry-expanding machine and dry-expanding machine set

Abstract

A heat-shrinkable tube dry expander includes a feed device, a heating device, an expanding die and a draughting mechanism that are arranged from up to down. The heating device includes a far infrared heater; the far infrared heater is provided with an inner heating cavity. The dry expander has a high heating efficiency and drives stably; the axial shrinking rate of the manufactured products is little; besides, the dry expander is environment-friendly, saves energies, has no pollution, protects the health of operating personnel and saves a great amount of water. The invention also provides a dry expander set which is formed by multiple dry expanders; can reduce the quantities of the operating personnel to the best, reduces the human cost and improves the production efficiency. An operating platform is arranged between every two dry expenders, thus being convenient for operation and maintenance as well as being capable of improving the personal safety of the operating and maintaining personnel.

Description

technical field [0001] The invention relates to equipment for manufacturing heat-shrinkable tubes, in particular to a dry expansion machine for expanding heat-shrinkable tubes and a dry expansion unit composed of a plurality of the above-mentioned dry expansion machines. Background technique [0002] Existing heat-shrinkable tube expansion machines generally include several parts such as a conveying mechanism, a heating device, an expansion mold and a traction mechanism. The mold is expanded and pulled out by the traction mechanism after cooling. [0003] The conveying mechanism is generally composed of two conveying rollers, and relative sliding tends to occur between the pipe to be expanded and the two conveying rollers, which causes fluctuations in the speed of the pipe to be expanded and affects the axial shrinkage rate of the product. In addition, the radius of curvature of the conveying roller is small, the tube to be expanded is prone to bending, and the internal ven...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the relative sliding between the tube to be expanded and the two conveying rollers caused by the existing electric heating heat shrinkable tube expansion machine, which causes the speed of the tube to be expanded to fluctuate and affects the axial shrinkage of the product rate; in addition, the radius of curvature of the conveying roller is small, the tube to be expanded is prone to bending, and the internal ventilation is not smooth, which will also affect the axial shrinkage rate of the product

At the same time, it overcomes the problems that the glycerin heating heat shrinkable tube expansion machine is easy to produce a lot of smoke, pollute the environment and equipment, damage the physical and mental health of operators, waste a lot of water resources, and pollute water quality.

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