Corrugated hose with joint jacket and manufacturing method thereof

Abstract

The invention relates to a corrugated hose with a joint jacket, simultaneously relates to a manufacturing method thereof, and belongs to the technical field of hoses. A hose body consists of a corrugated tube and a woven jacket sleeved outside the corrugated tube; the end head of the hose body is sleeved with a collar which is provided with internal threads matched with corrugation of the corrugated tube, and radial punch holes; the outer end of the hose body and the collar is coated with a joint jacket formed by injection molding; and an inner hole of the joint jacket is percolated and extended with a percolating plastic structure which is combined with the outer wall of the corrugated tube through the punch holes and the gap of a jacket woven structure. The manufacturing method comprises the following main steps: sleeving the woven jacket outside the corrugated tube; screwing the collar to the end head of the hose body; and forming the joint jacket coating at the outer end of the hose body and the collar through the injection molding. The corrugated hose has firm connection, can avoid the damage of the jacket, has good bandability and torsibility, and obviously prolongs the service life.

Description

technical field [0001] The invention relates to a hose, in particular to a corrugated hose with a joint sheath and a manufacturing method thereof, belonging to the technical field of hoses. Background technique [0002] As far as the applicant knows, the corrugations of existing vacuum cleaner hoses and other corrugated pipes are all exposed. During use, not only adjacent corrugations will rub against each other, but also easily distorted and deformed, resulting in creases or even collapse, which will affect the ventilation or vacuuming effect. In addition, after long-term use, the creases will not be able to rebound, so that the bendability and twistability of the bellows will be reduced, resulting in breakage and shortening the service life of the hose. For this reason, the Chinese patent application with the application number 200480008806.X discloses a pipe fitting, which includes a conductive bellows and a conductive polymer sheath, wherein the conductive bellows inclu...

AI Technical Summary

Problems solved by technology

However, due to the addition of a sheath to this type of hose, when the joint is formed by traditional direct injection molding, it is not only difficult to firmly connect the joint with the hose body and the sheath, but also the inner end of the injection molded joint is inevitably separated from the outer edge of the sheath. Injection molding burrs are formed between them, which can easily lead to stress concentration. As a result, the sheath is easy to separate from the hose body during use, and the sheath is easy to crack at the inner end of the joint due to frequent bending.

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