Enameled wire is a wire wrapped around a metal or copper wire with insulating enamel. It is commonly used in applications such as motor windings and transformer windings. Surface defects may affect the conductive properties, insulation properties and mechanical strength of enameled wires.

The following are some common enameled wire surface defects and brief analysis:

Bubble:
Performance: Small bubble-like bulges appear on the surface.
Reason: It may be that the solvent in the paint liquid is not completely evaporated or the gas escapes during the production process, or it may be caused by oil pollution, moisture, etc.
Impact: Bubbles will affect the insulation performance and appearance of enameled wires.

Crack:
Performance: Small cracks appear on the surface of the thread.
Reason: It may be that the wire is bent or stressed too much during the manufacturing process, or it may be due to material quality issues.
Impact: Cracks will affect the mechanical strength and insulation properties of the enameled wire, which may cause the wire to break easily during use.

Dimples:
Performance: There are depressions or holes on the surface of the wire.
Reason: It may be due to external impact or extrusion during the manufacturing process, or it may be due to defects in the raw materials.
Impact: Dimples will affect the appearance and mechanical strength of the enameled wire.

Bump:
Manifestation: Bumps or bulges appear on the surface of the line.
Reason: It may be caused by uneven viscosity of the paint liquid or process problems during the manufacturing process.
Impact: The bulges will affect the appearance and insulation properties of the enameled wire.

Loose paint layer:
Performance: The enameled layer is not tight and appears loose.
Reason: It may be that the paint liquid adheres unevenly or there is a problem with the drying process.
Impact: The loose paint layer will affect the insulation performance and mechanical strength of the enameled wire.

foreign body:
Performance: There are impurities or foreign matter attached to the surface of the enameled wire.
Reason: It may be caused by unclean environment or irregular operation during the production process.
Impact: Foreign matter will affect the conductive and insulating properties of enameled wires.

These surface defects may affect the quality and service life of the enameled wire. When producing and using enameled wire, it needs to be controlled and inspected in strict accordance with the corresponding quality standards and specifications to ensure that it meets the requirements. At the same time, if surface defects are found during actual use, it is recommended to repair or replace them in time to avoid affecting the normal operation of the equipment.