How To Control The Quality Of Rubber Seals
🕙 2023-09-06 👆
Silica gel products have a wide range of applications. Because they are non-toxic and environmentally friendly, and do not rely on petroleum resources, silica gel products appear in all aspects of our lives. Under what circumstances will the quality of silica gel products be affected.
1、 Quality of silica gel raw materials: the quality of raw materials will make it difficult to remove the edges of silica gel products. Poor quality silica gel raw materials have insufficient toughness and tear strength. It is certainly difficult to remove the edges in the process of edge removal.
2、 In the forming process: if the product is formed thick, the rough edges are actually thicker than the silicone products. The increase in thickness will certainly lead to the difficulty of edge removal.
3、 Problems in forming molds: if the self disassembly design of molds is unreasonable, the use of forming molds is too long, and the quality of forming molds is not up to standard, it will be difficult to remove the edges after production molding.
4、 Vulcanization environmental factors: the vulcanization temperature should be appropriate. Problems of too high or too low will lead to difficult edge removal. At the same time, the vulcanization time also needs to be well controlled. Too long a vulcanization time will lead to brittle products. Too short a vulcanization time will lead to ineffective vulcanization links. Therefore, the vulcanization links of silicone products manufacturers must be well controlled.
The correct way to choose rubber seals is:.
1. Direction of movement - first determine the direction of movement where the seal is located, such as reciprocation, rotation, screw or fixation.
2. Key points of sealing - for example, it is decided that the movable point is the rod seal with inner diameter or the movable point is the piston seal with outer diameter.
3. Temperature grade - consult the original machinery utilization instructions or evaluate the working temperature according to the actual working environment to determine the required utilization data. Silica gel products have an open porous structure and can adsorb many rubber products. They are a good desiccant, adsorbent and catalyst carrier. The adsorption of silica gel is mainly physical adsorption, which can be regenerated and reused. Add acid to alkali metal silicate (such as sodium silicate) solution, Acidify it, add a certain amount of electrolyte and stir it to generate silicic acid gel, or add acid or ammonium salt to the concentrated sodium silicate solution to generate silicic acid gel.
4. Pressure level - refer to relevant data from the original mechanical utilization instructions, or infer the working pressure level by looking at the soft hardness and structure of the original seals.
Previous：How does conductive silicone w