Be Difference

To Produce the hydraulic hose, first step to making the rubber sheet and then put them into the extruding machines cover with PP materials soft mandrill, this is the inner rubber, it is high tensile oil resistant NBR rubber.

The mandrill is very important, because it will influence the measure of hose inside diameter. So we need to control the mandrill tolerance between 0.2mm to 0.4mm. If the mandrill outside diameter get 0.5mm bigger than standard request, we will abandon it. On the other side, we will drying it and leave the mandrill unused at least 24 hours.

Second step is to prepare steel wire, we used the high speed joint machines, this kind of machine can make the steel wire group very flat, uncrossing and less length difference.

Thirdly, After finish the steel wire treatment, we need to do the steel wire braiding and spiraling on the inner rubber. But before, there are cooler bins which can keep the temperature of -25 ℃ to -35 ℃ to make the inner rubber avoid deformation . And then to extruding the outer rubber again; this time, the rubber must be high tensile and abrasion resistant SBR/NR Rubber. Meanwhile, the special OEM brand print will put on the cover of the hoses.

When we making 2SN hoses, and 4SP, 4SH hoses, we need to add the middle rubber between the steel wire, to make it adhesive tight and strong. This is the important step to make sure the high working pressure of the hoses, so we pay more attention on the materials of the rubber.

The forth, to wrap the cloth tap on the cover of the hoses and then to do the vulcanization, the vulcanized temperature need to be 151 ℃, working pressure is 4 Bar, and 90 minutes. After this step, the rubber have qualitative change.

At last, After all of these works, the hoses are finally finished now, what we need to do is to testing the working pressure, if the hose no leaking and pass the proof testing, they can go ahead to packing.

For the fitting production line, they are all follow the Eaton Standard, we used solid carbon steel #45 to make crimping fittings, and carbon steel #20 to make ferrules.

The first to cut the materials into different length. The materials need to do the hot forging, it can enhance the tenacity of the materials, so the fitting will not rupture during assembly with hoses.

The second is to drilling holes for fittings, we used the semi-automatic drilling machines to save cost.

There are 50 sets CNC Machines, and 10 sets Automatic Machines to lathe thread, During the processing, our workers need to test the thread by the go-no-go gauge.

The third, is to make cleaning and zinc plating, there are three alternative colors: silver white, blue white, and yellow. We will randomly select the samples to do the salt spray test to control the fitting working life.

At last to crimping the nut, testing the working pressure and packing.

Our factory has a strict production system and quality monitoring system. Each process has a responsibility card and needs to be signed by the responsible worker. If there are quality problems, the responsible person need to bears the corresponding responsibilities. In addition, there is a quality control manager who supervise each step during production.

Quality is our life, quality makes Sinopulse difference, quality is our trump card, Sinopulse is your best choice.