How should the density of the Automotive Wiring Harness Protection Sleeve be tested when it is mixed?

There will be a rubber mixing process before the production of the Automotive Wiring Harness Protection Sleeve. Because the function of the Automotive Wiring Harness Protection Sleeve is different, the hardness will be different during production, so it is very important to test the density during the rubber mixing. Then how to test the density of the Automotive Wiring Harness Protection Sleeve when mixing the rubber. In addition, the density needs to be tested during the "quick inspection" of the mixed rubber. However, there are many bubbles and pores after our mixed rubber is pressed, which leads to inaccurate density tests. How to solve this problem and what factors need to be paid attention to during the test.

The rubber materials that need to be tested for density during rubber mixing are vulcanized rubber materials, because the density of unvulcanized rubber materials is extremely inaccurate due to the problem of porosity, and the density before vulcanization and the density of the mixed rubber are added. The density itself has a relatively large error, so the density of the rubber compound needs to be tested with the vulcanized rubber material. As for the problems of many air bubbles and pores after the compound rubber is pressed, the assumption that the solid is incompressible can be used to obtain the porosity by measuring the density of the vulcanized rubber and the compound rubber, and then use a small open refining thin pass several times to drive out the air bubbles, and then vulcanize.
Finally, the compound rubber needs to be "quickly checked" to test the density, because the quick test is for quality control, so before the test, you can cut a small piece of non-porous and bubble-free mixed rubber and put it in the density liquid, and do a few more tests to get its average value to determine the density standard.