If the "Dawson" inflatable rubber ship airbag was damaged, it can be repaired as long as the rubber doesn't age serious (with no crack and sickness on the surface), repair can be made by sickness coating cord fabric, and vulcanization be made by the electric heating plate, to make it an organization on whole with the capsule, no steam leakage, no permeability. The methods are as follows:
First, wash the airbag surface
Use the cleanser to wash the inner and outer of the ship airbag. Rinse the mud and sand, oil stain and water logging, dry the surface.
Second, check the damage of the airbag
The cutting of the skin coating cord fabric should be according to the damage area to paste and steady.
1.Mark the repair symbol visibly, polish the repair area, and scope according to the airbag's type, specifications, cord fabric and the damage size. Usually one HH-4 below is 15cm-20cm, the HH-5 above is 22cm-28cm.
2.Polish the repair part circle, break and line loose is not allowed for the fiber cord fabric, if the breach is bigger (usually is 6cm above) should be sewed by the nylon cord.
3.Use the gasoline wash the dust of the airbag surface, then wipe the plasma gel made by the gasoline and the unvulcanized rubber(glue:gas is 1:5) when the plasma gel dried, stick the heal film in the crack part, the surface be washed by the gas and then dry it.
4.No matter which direction is airbag is damaged, when paste the first cord, seam should be by the radial direction, the second cord cut out the 45 angle, off pasted the third, right pasted, the forth, the fifth....be according to the second and third methods.
5.If the airbag be pricked as an circular hole, it can be used by length and width cross methods by the cord.
6.Every layer on the pasted airbag should be smeared and cleaned by the oil, when it is dry, then pasted the pinch roller made it to a whole.(if there is bubble, use an needle puncture the air out)
7.From the second layer of the pasted cord fabric, every layer of the scaffold is more bigger than the last layer, and every cod fabric should be cutted to the circular angle, then close and seal of every sides by the adhesive tape.
Third, use the vulcanization plate with electric heating to vulcanize
1.The electric heating vulcanization to repair the airbag usually set up a frame(solid, impact-res stance which is made of the steel plate, the steel rail and other metal materials, as shown in the figure. The jack(20tons), the heat plate(40cm*30cm*30cm), the sand bag(70cm*60cm*30cm), the square wood block, cotton.
2.To pasted the place yell to repair of the airbag compact by the roller, put the isolation(talcum powder, etc), lay a piece of cotton, out on the heat plate square wood block, and put the jack, apply the pressure(about 0.8Mpa), after all is ready, electric and heat the vulcanization plate, when the temperature on the temperature gauge reaches 135°+5℃ (it's time usually needs 25 minutes), turn off the power switch, keep the temperature 135℃, continue vulcanizing for 25 minutes. Turn of the power switch, wait the heat plate cool off slowly(about 2 hour), the vulcanization is completed.
3.If the cleft is too long, longer than the length of the heat plate, it needs to be vulcanized from the middle to the order, when continuative vulcanization, the continuative part of the heat plate is not less than 2cm.
4.When the vulcanization is complete, check the repair place, it must flat, smooth, crease, without fold place, under vulcanization and over vulcanization are not be allowed, charge rest will be conducted(the pressure is 1.25 times of the working pressure),after the test, the air-bag should be used.
Note: if the repairance area is large, the air-bag only be used for supplementary, it should be reduced the working pressure according to the broken level.
English
