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Rubber material consistency monitoring method

A rubber material, consistent technology, applied in the material field, can solve the problems of lack of material test piece and actual parts material consistency, lack of parts consistency control, no verification standards, etc., to achieve short test cycle, effective transfer, sample small amount of effect

Inactive Publication Date: 2019-05-03
JMC HEAVY DUTY VEHICLE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) Many rubber parts suppliers are small manufacturers with poor comprehensive capabilities;
[0006] (3) The approval of rubber materials is mainly to provide material test pieces for test verification, lacking the inspection of material consistency between material test pieces and actual parts;
[0007] (4) Except for the main rubber parts (pipelines, door and window sealing strips), most small rubber parts do not have part standards, but are verified through systematic tests. When parts fail, there are often no verification standards
[0008] In summary, it is necessary to establish a rubber material consistency monitoring method for the lack of consistency control from the existing rubber material test pieces to parts

Method used

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  • Rubber material consistency monitoring method
  • Rubber material consistency monitoring method
  • Rubber material consistency monitoring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Pre-test whether the inner rubber material of a batch of rubber hoses is consistent with the drawing of the defined material (EPDM), and randomly select a sample from the rubber hoses supplied in batches for density, infrared spectrum and thermogravimetric tests as performance tests . (1) Density test results of defined material and bulk material are respectively: 1.12g / cm 3 and 1.17g / cm 3 , the deviation exceeds 0.05g / cm 3 ; (2) Obtain the thermal weight loss curve of the product through the TG test, compare it with the TG curve of the defined material, and get as follows figure 2 From the curve, it can be seen that the mass loss of the defined material and the sampling sample before 300°C are -2.91% and -22.73% respectively; the mass loss at 300°C~550°C is -48.96% and -32.32% respectively; -43.8% and -26.64%; the residual mass after 650°C is 4.4% and 18.4%, respectively, with a deviation of more than 5%. Therefore, it can be concluded that the material formula us...

Embodiment 2

[0045] Pre-test whether the wiper rubber strip material supplied in a batch is consistent with the drawing (CR) of the defined material, and randomly select one piece from the rubber hose supplied in batches, and conduct density, infrared spectrum and thermogravimetric test performance tests. (1) Density test results of defined material and bulk material are respectively: 1.33g / cm 3 and 1.34g / cm 3 , the deviation is less than 0.05g / cm 3 ; (2) The thermal weight loss curve of the product is obtained through the TG test, and compared with the TGA curve in the material approval stage, the attached image 3 From the curve, it can be seen that the mass loss of the defined material and the sampling sample before 220°C are -6.89% and -7.73% respectively; the mass loss at 220°C~550°C is -49.96% and -48.96% respectively; are 43.25% and 43.31%, and the deviations are less than ±5%. Therefore, it can be concluded that the material formula used in batch products is consistent with the ...

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Abstract

The invention relates to the technical field of a material and particularly relates to a rubber material consistency monitoring method. The method comprises steps of (1), establishing a vehicle rubberpart basic information database; (2), performing performance tests on defined materials, and constructing a vehicle rubber material performance database including density, Fourier transform infraredspectrum, TG test, etc.; (3), testing sampled parts or failed return parts; and (4), comparing test data of the (3) with the performance database of the (2) to determine the consistency. The method isadvantaged in that whether the materials used in batch parts are consistent with original definition materials can be effectively identified, and no special testing equipment is needed; the method can serve comparison and selection of multi-platform and multi-vehicle model parts, and non-professional technicians can further rapidly determine whether the materials are consistent, and strong generalization property is realized.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a method for monitoring the consistency of rubber materials. Background technique [0002] Automotive rubber products are an indispensable and important component of auto parts. Calculated according to different types of cars, each car needs to be installed with about 100-200 kinds of rubber products; in addition to tires, due to different car specifications, the rubber material for cars is about 15-60 kg. The rubber products installed in a car (excluding tires) account for about 6% of the total cost of the car. With the modernization of automobile technology, the requirements for automobile rubber products are becoming increasingly strict and demanding. Not only are rubber materials with various special properties required to meet the new technical requirements of automobiles, but rubber materials are also required to have higher physical and mechanical properties. The perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/44
Inventor 郑芳芳张瑞峰李彬
Owner JMC HEAVY DUTY VEHICLE CO LTD
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