What is the high pressure hose production process

High pressure hose manufacturing equipment, raw materials, complex production process. But in recent years, plastic or thermoplastic elastomer as the main raw material of high pressure hose production process can be properly simplified, but the raw material price is higher, still mainly rubber raw material, high pressure hose production process is mainly what?

High-pressure hose production technology:

1. The high-pressure hose uses a mixer to mix the inner layer of glue, the middle layer of glue and the outer layer of glue. The inner tubing is extruded by an extruder over a soft or hard core coated with hair removal agent

2. The high pressure hose is thinly pressed with the middle adhesive by the rolling machine, and the separator collection reel is added, and cut to the specified width according to the process requirements.

3. When winding or braiding copper-coated steel wire or copper-coated steel wire in the winding machine or knitting machine, the intermediate layer adhesive sheet is wound between every two layers of copper-coated steel wire or copper coated steel wire at the same time in the winding machine or knitting machine. The beginning and end of a winding wire

4. Recover the external adhesive on the extruder and wrap the lead or cloth vulcanizing protective layer. High pressure hose

5. Curing by curing pain or salt bath.

High pressure hose common problems

1. Failure of external rubber layer:

(1) There are cracks on the outer table of the hose

The main cause of cracks in the outer table of the hose is that the hose bends in cold conditions.

(2) Bubble ring appears on the outer surface of the hose

The bulge on the outer surface of the hose is caused by the unqualified quality of hose production or improper use during work.

(3) The high pressure hose did not break, but the oil penetrated a lot

There was a lot of oil in the hose, but no break was found. The reason is that when the hose passes through the high pressure oil flow, the inner bridge is eroded, scraped, and penetrated into the wire layer in a large area.

(4) The rubber layer outside the hose is seriously deteriorated, and there are micro cracks on the surface, which is the performance of natural aging of the hose. Due to aging deterioration, the outer layer is constantly oxidized, the surface is covered with ozone layer, and becomes thicker with the passage of time. The hose is gently bent in use, and there may be small cracks. When this happens, the hose needs to be replaced.

2. Failure of the rubber layer inside the high-pressure hose:

(1) The rubber layer in the hose is hard and cracked. The main reason is to add plasticizers to rubber products to make the hose flexible and plastic. However, if the hose overheats, the plasticizer may spill.

(2) The rubber layer inside the hose is seriously deteriorated and obviously expanded. The rubber layer in the hose is seriously deteriorated. The reason for the obvious expansion is that the rubber material in the hose is incompatible with the hydraulic system oil, and the hose is deteriorated by chemical action. 3. Indicate the fault of the hardening layer.

(1) The hose is broken, and the iron wire is braided near the broken part. The rusty hose is broken, and the outer rubber layer is peeled off for inspection. As a result, the iron wire is braided near the broken part and rusted. This is mainly because the action of moisture or corrosive substances leads to the weakening of hose strength, high pressure rupture.

(2) There is no rust in the strengthening layer of the hose, but irregular silk damage occurs in the strengthening layer.

The hose breaks, stripping the external adhesive, the stiffener is not rusted, but breaks irregularly along the length of the stiffener, mainly because the hose is subjected to high frequency impact.

4. Failure of high-pressure hose rupture outlet:

(1) One or more hoses are broken, cracks are neat, and other parts are kept in good condition.

This phenomenon is mainly because the system pressure is too high, exceeding the pressure resistance of the hose.

(2) torsion when the hose breaks

This phenomenon is caused by excessive twisting of the hose during installation or use.

5. To sum up, through the above analysis, the following matters should be paid attention to when using high pressure hose in the future:

(1) The hose layout should be as far away from the engine exhaust pipe as possible from the heat source. If necessary, equipment such as a sleeve or protective screen can be used to prevent the hose from deteriorating into heat.

(2) When the hose needs to cross or work, protective devices such as hose clamps or springs should be applied where friction may occur on the mechanical surface to prevent damage to the outside of the hose.

(3) When the high pressure hose needs to be bent, the bending radius can not be too small, must be more than 9 times the outer diameter. There must be a straight line section 2 times larger than the outside diameter of the pipe where the hose and connector are connected.

(4) Installation of high pressure hose can not be pulled tight, even if there is no relative movement at both ends of the hose, but also to keep the hose loose. The tensioned hose expands under pressure and loses strength.

(5) Do not twist the hose during installation. By twisting the hose a little, the strength will be reduced and the joint will loosen, and assemble by tightening the hose to the hose, not the hose to the joint.

(6) If the hose is composed of major components, it is recommended to check or replace it regularly.