Analysis of the problem of poor cleaning of the brake supply air source The impurities in the wind source are generally three kinds of water, oil and dust impurities. When the pressure is not large, the absolute pressure of the compressed air is substantially proportional to the absolute moisture content. Therefore, the water content of the compressed air itself is several times the water content of the atmospheric air. When the air temperature of the air compressor does not exceed 160 °C, the two-stage water cooling of the air compressor and the natural cooling of the air supply pipeline, the condensed water is further precipitated in the pipeline, which is an inevitable result of the operation of the air compressor and the pipeline system. The oil is produced by mixing the lubricating oil and compressed air necessary for the operation of the air compressor. The dust is generated because the air suction port of the air compressor sucks in the heavily polluted air, and the installation position of the air filter is too high. The cleaning and replacement of the filter element is not timely, so that the dust filter is easily polluted and the dust comes in. Corrosion in the pipeline causes surface rust dust to enter the wind source. Although the air compressor itself is equipped with a water-oil separator, the operator is required to discharge 1 or 2 times a day, and the discharge valve of the lower body of the storage cylinder is required to be discharged regularly every day. Since these are manual operations, the operator has the quality of the wind source. Insufficient understanding of importance, coupled with failure to comply with relevant standards, resulting in unclean ground sources, causing some of the oil, water and other impurities contained in the wind source to mix with compressed air and enter the train brake pipe. . These gases contain a water-soluble binder that will remain as the gas passes through the brake pipe system, the three-way valve, the fiber pores of the distribution valve, the matte surface, and the location where the geometry suddenly changes, increasing the friction surface resistance. Even dry grinding occurs, and there is a gap in the sealing part. It is recommended that (1) the scientific research department recalculate the strength of the design core plate bolt and increase the safety factor for the actual situation of the speed-increasing and heavy-duty train. (2) It is recommended to set the core bolt wear limit. (3) It is recommended to establish the standard of the bolting force of the core plate, and the maintenance personnel use the standard torque wrench to tighten the bolt and nut. (4) In order to prevent loosening of the lower core bolt, the Ministry of Railways has ordered that the FS type or type locknut should be installed from March 2000, which fundamentally solves the loosening and breaking of the lower core bolt. It is recommended that all units strictly implement the various aspects from the loading and loading, to the completion and acceptance of the vehicle, and eliminate the phenomenon of broken core bolts.
Plastic car exterior parts refer to front and rear bumper moulds, fog lamp moulds, and grilles and all plastic accessories, are requesting high quality with hardened steel 1.2738 or Finkl P20 hard steel in order to guarantee specified mould life such as 1000000shots. Plastic injection material is PP or ABS as per customer's requirement. Ceeto company has skilled design engineering team who is able to design plastic car bumper moulds as per part geometry, bumper mould design will be first considered hidden parting line or visible parting line according to DFM analysis and moldflow report.
Technical information for Car front bumper and rear bumper mould
Ceeto Service Scope to manufacture car bumper mould
Plastic Car Front Bumper and rear bumper mould test
Before we ship bumper mould to you, we will have bumper mould buy-off in house together with you, and we must make official at least three mould tryouts and 2000 empty cycle for mould to check if mould function is ok in a certain time.
Normally, you and we attend the validation procedure together and sign off after checking. What we are checking usually are as follows:
Plastic car bumper mould material and heat treatment
What we will also inspect mould material and heart treatment as follows:
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Automotive Exterior Plastic Injection Mould Automotive Exterior Plastic Injection Mould,Injection Molding Automotive Parts,Plastic Car Front Bumper,Plastic Car Rear Bumper Zhejiang Ceeto Molding Technology Co.,Ltd. , http://www.ceetomold.com
Corrosion in the pipeline causes surface rust dust to enter the wind source