Description

Introduction of hand build wide arch rubber expansion joint:

Most people are unfamiliar with wide arch rubber soft joints. With the continuous development of economy, sometimes non-standard rubber expansion joints need to be used under special circumstances, and the price of making new molds or changing molds is too expensive. Therefore, in order to save costs, people think of using wound rubber expansion joints to replace fixed mold vulcanized rubber expansion joints. Then, many people will ask, What is the hand build wide arch rubber expansion joint and what is its manufacturing process? hand build wide arch rubber expansion joint is a tubular rubber part composed of inner and outer rubber, cord fabric and steel ring, which is made by hand, vulcanized at high temperature and high pressure, and then combined with metal flange or loose sleeve of parallel joint. This product makes use of the advantages of rubber, such as high elasticity, high gas resistance, medium resistance, weather resistance and radiation resistance, can reduce vibration and noise, and can compensate for thermal expansion and cold contraction caused by temperature change. The ball size is flexible and diverse, and can be customized according to demand. It is widely used in various pipeline systems.

China factory for wide arch rubber expansion joint. have material EPDM, NBR,etc, They are all hand built by our workers.

Multiple  of rubber impregnated high strength polyester or nylon tire cord form the first pressure reinforcement over the tube. Arch swell in response to pressure and arch migration are virtually eliminated by criss-crossed layers of reinforcement that pass over the arch and around steel or ductile iron rings embedded on both sides at the base of the arch.

rubber expansion joint’s Body arch is controlled by high strength fabric or spiral steel wire. Large diameter expansion joints are often built with steel rings in place of the wire when in addition to internal pressure, external pressure resistance is important.

We accept different types of customization

External pressure may come from deep burial, shallow embankment under roadways or joints inside tanks.

Manufacturing process of winding rubber flexible joint: in the manufacturing process of rubber flexible joint, the interior is not pure rubber, but with woven mesh. To make qualified rubber soft joints, the inner rubber layer tube blank is placed on the workbench, the surface of the tube core is coated with an appropriate amount of isolating agent, and then the inner rubber layer tube blank is filled with an appropriate amount of air to sleeve the core. After the core is sheathed, it shall be sorted, inspected, sized and stored, and sent to the next process for winding. Determine the branching piece, mouth shape and winding stroke of the winding equipment according to the manufacturing requirements. Before winding the rubber flexible joint of the first steel wire, the steel wire shall pass through the lead ring, tension fitting, parting piece and shaping mouth according to the outgoing direction, and then be tightly tied on the lead pipe on the tractor with adhesive tape according to the winding direction. Start the winding machine to make the lead pipe move forward slowly, and adjust the traction speed through the governor to make the winding stroke meet the requirements. After the winding stroke is adjusted, install the medium film, And the pipe blank with braided protective layer is introduced (the surface has been wiped clean with solvent), the winding of steel wire rubber soft joint can be started. At the beginning of winding, the speed shall gradually increase, and after reaching a certain speed, the medium film shall be smoothly introduced into the winding layer at the same time. During winding, the steel wire tension shall be uniform, the steel wire shall be arranged on the tube blank in order, evenly and flat, and the pipe pressing of the traction device shall be appropriate and not too tight, Prevent deformation of pipe blank.

Under what circumstances will non-standard rubber flexible joints be used?

1. The length is quite different from the molded rubber soft connection, which is too short or too long.

2. Small diameter customers require the end face to be fully sealed. It should be noted that the buckle groove rubber soft connection is difficult to be wound.

3. The difference between the drilling hole and the standard is too large, especially the hole center distance is too large, and the die can not meet the requirements.