What are the attention of Enameled wire?
The coating is a process of forming a uniform coating layer of a coating wire to form a uniform coating layer on a metal conductor. This is related to some physical phenomena and painting methods of liquid.
When the liquid flows, the collision between the molecules moves a layer of molecules with another layer of molecules. Since the interaction force has caused the rear layer of molecules to move the movement of the previous layer, thereby exhibiting The stagnation of the activity is the so-called viscosity. Different coating methods, different wire specifications have different viscosity of coatings. The size of the viscosity is mainly related to the size of the molecular weight of the resin, the size of the resin molecular weight, the viscosity of the coating is large, because the molecular weight is highly obtained. Mechanical properties. The small viscosity is used for the wiring wire, the resin molecular weight is small, easy to apply well, and the paint film is smooth. There is a molecule around the surface of the surface tension liquid, and the gravity between the molecules can reach the temporary balance, which is in a layer of molecule in the liquid surface, and the gravity of the liquid molecule, and the introduction of gas molecules, but the gas The molecule is less than the liquid molecules, the distance is far, so the gravity of the liquid surface can achieve a temporary balance, and a layer of molecule in the liquid surface, and the other hand is gravited from the liquid molecules, and on the other hand, the gravity of liquid molecules, On the other hand, the gravity of liquid molecules is affected by the gravity of liquid molecules, and on the other hand, the gravity of liquid molecules.
After the paint wire is fucking, there is a pull-up process. Since the wire is painted by the felt, the paint liquid is olived, and at this time, the paint liquid overcomes the viscosity of the lacquer itself under the action of surface tension, and instantly encompasses.
If the wire specifications are small, the viscosity of the paint surface is small, and the required pull-up time is less; if the wire size is large, the paint surface viscosity is large, and the time required is large. In high viscosity coatings, sometimes surface tension cannot overcome the internal friction of the coating liquid, resulting in uneven coating layers.
After the paint wire is felt, there is a problem of gravity in the process of the paint layer. When the pull-up time is short, the olive cache disappears quickly, and the gravity effect is short, and the paint layer is uniform on the wire. When the pull-round time is long, there is a long time, the gravity is long, the sharp action is long, and the tip of the sharp-angled is a tendency to flow downward. The local area has a thickness, and the surface tension makes the paint into a spherical shape, becoming a particle . The gravity acts in the thickness of the paint layer very prominent, and it cannot be applied too thick every time the painting. This is one of the reasons for using thin paint multi-coating when paint coating.
When the cable is applied, if the thickness is applied, shrink under surface tension, forming a wavy or bamboo-shaped yarn.
If there is a very fine burr on the wire, the burrs are not easy to paint under the surface tension, which is easy to thin, causing the enameled wire pinhole.
If the circular wire itself is elliptical, the paint layer is thinner at the two ends of the elliptical long axis, and the second end of the short axis is thicker in the second end of the short axis. UnevenThe phenomenon, so the inclusion of the coated wires should meet the requirements.
When bubbles are generated in the paint, the bubble is the air wrapped in the paint liquid during agitation and feed. Since the air specific gravity is small, it rises through the buoyancy to the outer surface. However, due to the surface tension of the paint liquid, the air cannot break through the surface, stay in the paint liquid. This bubbled paint liquid is applied to the surface of the wire into the paint furnace. After heating, the air expands sharply. When the surface tension of the paint liquid is lowered, it will rush out of the surface, causing the surface of the paint brown wire to be not smooth.
Mercury droplets are reduced to elliptical on the glass plate, and the water droplets deploy the center slightly convex thin layer on the glass plate, and the former is a wet phenomenon, the latter is not moist. The wet phenomenon is a manifestation of molecular strength. If the gravitation between the liquid molecules is smaller than the gravity between the liquid and the solid, the liquid is wetted, and the liquid can be very uniformly applied to the solid surface; if liquid The gravitational force between the molecules is greater than the gravity between the liquid and the solid, and the liquid cannot be wetted, and the liquid is coated in the solid surface will shrink into a group. All liquids can be wetted certain solids without wetting other solids. The angle between the liquid surface tangent and the solid surface tangent is referred to as a contact angle, and the contact angle is less than 90 ¡ã liquid wetting solid, greater than or equal to 90 ¡ã liquid wetting solid.
The bronze wiring surface is bright, and it can be painted. If the surface is stained with oil, the contact angle between the wires and the lacquer borne, the lacquer is wet, and the wire is wet. If the copper wire is harder, the surface molecular lattice is arranged irregularly, which is small to the paint liquid, which is not conducive to the moist of the paint to the copper wire. The liquid of the capillary phenomenon wet tube wall is rising in the pipe, and the phenomenon of decwire in the pipewire in the pipewire is referred to as capillary. Since the moisture phenomenon and the effect of surface tension are formed. Felt coating is made of capillary. When the liquid wetting the tube wall, the liquid rises along the pipe wall to increase the surface area of u200bu200bthe liquid, and the surface tension should minimize the surface of the liquid surface, which makes the liquid surface tends horizontally, the liquid in the pipe It also increases, until the effect of liquid moist and surface tension is balanced with the liquid weight in the pipewire, and the liquid in the pipe will stop rising. The thinner the thin tube, the smaller the specific gravity of the liquid, the smaller the wet contact angle, the smaller surface tension, the tension of the liquid surface in the pipewire.
