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Dongguan Minz Rubber & Plastics Co., Ltd.

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How to control the quality of rubber seals

Release time:

2020-09-16 11:48

Source:

Dongguan Mingzhen

The application range of silicone products is very wide, because it is non-toxic and environmentally friendly, and does not rely on oil resources, so all aspects of our lives have the emergence of silicone products, so what circumstances will affect the quality of silicone products.

First, the quality of silicone raw materials: the quality of raw materials will lead to difficult to dismantle the edge of silicone products, poor quality of silicone raw materials, its toughness is insufficient, tear strength is obviously insufficient, in the process of dismantling the edge is certainly difficult to dismantle the edge.
Second, in the molding process: the product is relatively thick, so the burrs are actually relatively thick silicone products, and the increase in thickness will definitely lead to the difficulty of edge removal.
Third, the problem of molding die: if the self-disassembly design of the die is unreasonable, the use of the molding die is too long, and the quality of the molding die is not up to standard, these situations will make it difficult to dismantle the edge after production and molding.
Fourth, vulcanization environmental factors: vulcanization temperature should be appropriate, too high or too low will lead to difficult to dismantle the edge, at the same time, vulcanization time also needs to be well controlled, vulcanization time is too long will lead to brittle products, vulcanization time is too short will lead to vulcanization link is not effective, so silicone products factory vulcanization link must be well controlled.
The correct methods for choosing rubber seals are:.
1. Direction of movement-first determine the direction of movement of the position of the seal, such as reciprocating, rotating, spiral or fixed.
2. Sealing focus-for example, determine the active point is in the inner diameter of the pull rod seal or the active point is in the outer diameter of the piston seal, etc.
3. Temperature grade-refer to the original mechanical 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 absorb many rubber products. It is a good desiccant, adsorbent and catalyst carrier. The adsorption of silica gel is mainly physical adsorption, which can be regenerated and used repeatedly. Acid is added to alkali metal silicate (such as sodium silicate) solution, make it acidic, and then add a certain amount of electrolyte to stir, that is, the formation of silicic acid gel, or in a more concentrated sodium silicate solution with acid or ammonium salt can also generate silicic acid gel.
4. Pressure rating-check the relevant data from the original mechanical utilization instructions, or infer the working pressure rating by looking at the hardness and structure of the original seal.







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