Heat-shrinkable tube expansion traction device

Abstract

The invention discloses an expansion traction device of a heat shrinkable tube. The device comprises a support frame, a mold nozzle assembly, a sizing sleeve assembly, four traction belts and a belt traction mechanism, wherein a plurality of upper guide rods and a plurality of lower guide rods which are arranged in parallel are arranged in the support frame; a first through hole is formed in the mold nozzle assembly, and the diameter of the first through hole is gradually increased from the beginning to end; the sizing sleeve assembly communicates with the first through hole of a die nozzle; four grooves are correspondingly embedded in the four traction belts; and the belt traction mechanism is arranged on the support frame through the upper guide rods and the lower guide rods, and the operation of each belt is driven correspondingly. According to the device, the four belts are uniformly distributed along the circumference, the framework matched with the four belts is arranged, and thetraction of the expansion process of the heat shrinkable tube can be uniformly guided around the periphery; and the inner diameter of the mold nozzle attached to the mold is gradually enlarged, so that the friction force in the expansion and transmission of the heat shrinkable tube can be better reduced, and the wall thickness of the heat shrinkable tube product is not remarkably improved.

Description

technical field [0001] The invention relates to a heat-shrinkable tube processing device, in particular to a heat-shrinkable tube expansion and pulling device. Background technique [0002] During the processing of heat-shrinkable tube products, an expansion process is required. In the existing continuous expansion process, the heat-shrinkable tube will be close to the sizing sleeve during the expansion process. Due to the large friction between the heat-shrinkable tube and the sizing sleeve, it is easy to cause the heat-shrinkable tube to be stretched too much and affect the Product quality issues. [0003] Chinese patent CN101941291A discloses an expansion mold with traction belts, through which a pair of traction belts reduces the frictional force encountered during the expansion process of the heat-shrinkable tube. Although this technology can solve the problem of excessive friction to a certain extent, since a pair of traction belts are arranged close to each other, t...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a heat-shrinkable tube expansion and traction device, which can efficiently reduce the frictional force encountered during the expansion process of the heat-shrinkable tube, and can make the force around the heat-shrinkable tube uniform, overcoming the existing There are problems such as heat-shrinkable tube wall thickness, inclination, partial wall, etc.

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