Engineers from Desso said that the role of wire sealing design in M12 connectors is mainly reflected in the following aspects:
Prevent external moisture, dust and corrosive substances from invading the wire, keep the wire clean and dry, and ensure the stability and reliability of the electrical connection.
Prevent the wire from loosening or falling off, maintain a tight connection between the wire and the connector, and prevent the leakage or interruption of the electrical signal.
Improve the overall mechanical strength of the connector, enhance the weather resistance and impact resistance of the connector, and prolong the service life of the connector.
The basic principle of wire sealing design is to prevent the outside environment from invading the wire by creating a barrier between the wire and the connector. This barrier can be achieved by filling the sealing material, setting up the sealing structure, or using a sealing gasket.
The methods of wire seal design mainly include filling sealing method, extrusion sealing method and mechanical sealing method. The fill-and-seal method is to form a sealing barrier by filling the wire and connector with a sealing material; The squeeze seal method creates a seal by squeezing the gap between the wire and the connector; The law of mechanical sealing is achieved by setting up a special sealing structure or gasket.
The choice of sealing material is important for the sealing effect of the conductor. Common sealing materials include rubber, silicone, polyurethane, etc. These materials have good elasticity, water resistance and corrosion resistance, and can adapt to a variety of harsh environments. When selecting a sealing material, it is necessary to consider factors such as the temperature resistance range, chemical resistance and mechanical strength of the material to ensure that the sealing material can maintain stable performance for a long time in a specific working environment.
The degree to which the wire diameter matches the connector aperture directly affects the sealing effect. If the aperture is too large, the wire may become loose inside the connector, resulting in a poor seal; If the aperture is too small, it may damage the wire insulation or cause the wire to not be plugged in. Therefore, it is necessary to ensure that the wire diameter matches the connector hole diameter during the design.
When filling the sealing material, you need to ensure that the material evenly fills the gap between the wire and the connector to avoid air bubbles or voids. At the same time, the sealing material needs to be sufficiently cured to ensure its sealing performance.
The design of the sealing structure needs to be reasonable, not only to ensure the sealing effect, but also to avoid excessive resistance to the plugging and unplugging operation of the wire. Common sealing structures include threaded seals, clamp seals, etc., and it is necessary to select the appropriate sealing structure according to specific application scenarios.
After the wire seal design is completed, the seal performance needs to be tested and verified. Common test methods include water pressure test, air tightness test, etc., to ensure that the seal design meets the actual use needs.