Is the hardness of the Automotive Wiring Harness Protection Sleeve related to the rubber mixing process?

The hardness of the Automotive Wiring Harness Protection Sleeve is different due to its different use requirements. Some customers asked: For the same formula of Automotive Wiring Harness Protection Sleeve, the hardness of the rubber compound made with Cable Sleeve is about 10° lower than that made with internal mixer. Is this caused by the rubber mixing method?

The manufacturer thinks it has something to do with it. For example, there is a difference between the Cable Sleeve and the rubber mixing of the internal mixer. The Cable Sleeve takes longer, so the way of refueling may cause changes in hardness. One stage of refueling and two stages of refueling There is a big difference, but the hardness of the Automotive Wiring Harness Protection Sleeve cannot be as low as 10°, right? See if there are other problems.
First check the weighing equipment, if the weighing is not accurate sometimes it will be misleading. Secondly, when the Cable Sleeve is used, the filler is wasted too much. In short, there is another possibility that the protective sleeve of the automobile wiring harness is over-vulcanized, or the degree of vulcanization is higher than that of the open-smelting, the Cable Sleeve is fed slowly, and the rubber-making time is long, so the hardness will be lower.
In order to meet the needs of customers, the innovative design of each production process from formula to production is carried out. The production formula is a commercial secret and I will not explain it in detail here, but there is one of the simplest processing methods that I have to share with you. The finished car wiring harness protective cover is treated with silicone oil once. After the silicone oil treatment of the Automotive Wiring Harness Protection Sleeve, the surface has a sense of lubrication. In addition, the surface of the Automotive Wiring Harness Protection Sleeve has an adsorption effect, so the Automotive Wiring Harness Protection Sleeve is placed in the air during the semester. The surface will appear A layer of gray tip, if the Automotive Wiring Harness Protection Sleeve is treated with silicone oil, it also reduces the adsorption on the surface of the Automotive Wiring Harness Protection Sleeve.
In short, after the Cable Sleeve is heated and formed in the first stage, its crosslinking density is not enough, and the density of the Cable Sleeve can only be increased by further vulcanization reaction. If the secondary vulcanization is not carried out, the automobile wire harness protective sleeve products produced may have poor performance It will be affected to a certain extent, and products with better performance will not be obtained.