The influence of process parameters on the performance of the finished airbag, the higher the air spring pressure of the curtain angle, the greater the carrier load of the airbag, the smaller the axial deformation and the lower the isolation. The angle of the curtain under the working pressure determines the radial direction of the airbag. Stiffness and expansion coefficient. The statistical results of the angle change of the airbag curtain and the performance of use are shown in the figure (reference value under no-load condition).
Reducing the angle of the curtain can reduce the shear stress between the layers of the turn-up portion of the ply, and reduce the possibility of delamination damage between the plies due to the increase in the inter-layer shear stress. However, the angle of the curtain is too small, the working diameter of the airbag becomes large, the lateral stiffness is too small, the lateral stability is poor, the puncture resistance is lowered, and the brake forward tilt is increased.
The width of the curtain and the length of the reverse package are determined. When the airbag is in use, the upper sub-port is matched with the upper flange, and the lower sub-port is matched with the lower piston of the airbag assembly. The working part is mainly the lower half of the midline of the airbag height, so the turn of the upper sub-port is longer than the lower sub-port to ensure the flex resistance of the lower part. The longer the length of the reverse package, the thicker the thickness of the airbag, the smaller the deformation ability, and the greater the inter-layer shear stress. According to the dissection of foreign products, the production process is: the curtain is wrapped around the lower wire ring and then attached to the curtain, the process is difficult, but the lower carcass has good flex resistance. Therefore, the lower portion takes a smaller curtain turn length in the case of ensuring the bonding strength.
Formulation design The inner layer of the inner rubber bladder requires good air tightness, good bending fatigue resistance, good adhesion to the curtain, good elasticity and small permanent deformation. Therefore, the raw rubber is selected from natural rubber and butyl. The glue is used in combination, and the anti-aging system is mainly composed of an amine anti-aging agent 4010NA which is excellent in dynamic fatigue aging resistance, and uses BLE to improve the crack growth resistance. The reinforcing filling system uses N220 as the main component to improve the elasticity, reduce the permanent deformation of the rubber compound and improve the tear strength. Its formulation and physical properties are as shown. The outer layer of outer rubber has good weather resistance, high tear strength, good bending fatigue resistance, and certain wear resistance and puncture resistance. Its formulation and physical properties are as shown. The curtain rubber curtain cloth should have high tear strength and tear strength, and have higher adhesive strength and less permanent deformation with the cord. Its formulation and physical properties are as shown.
During the molding process, the angle and width of the curtain should be ensured to be accurate. When the same layer of glue is applied, the pressure roller should be tightly fitted. There should be no air bubbles or spacers. The length of the curtain can not exceed two cords. The length of the curtain is deformed, the overlap is not allowed to exceed one cord, the inner layer glue and the outer layer glue can not have air bubbles, the width of the hole width is accurate, the wire ring joint must be tight, the section size and the process size meet the process requirements, and the layers are The fit is tight, and the position of the same with the cord must be accurate to ensure that the length of the curtain after the package is in accordance with the process requirements. The surface of the toe rubber is smooth and can not be cracked, the size is accurate, and the joints and the traveler joints are staggered from each other. The formed airbag semi-finished product must be hung for 24 hours before it can be shaped and vulcanized.
The low temperature waste heat process to ensure the independence of the operation of each device, the existing production process will be retained as a backup. Most of the low temperature hot spots are side line products. In order to ensure the flexibility of the operation of the inner line products of the device, the cascade utilization of the temperature level is not considered for the time being, but the heat is taken in parallel. The gas separation device no longer uses condensed water as the low temperature hot water, and uses the gas separation device water pump P7003A/B as the circulating water pump of the low temperature waste heat recovery system. The general process of reforming the low temperature waste heat system.
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