Weaving Process of Copper Alloy Wire Mesh
Essentially, the weaving process of copper alloy wire mesh involves selecting different weaving methods within a complete production process to create a mesh surface that meets specific requirements (such as filtration precision and structural strength).
From Wire to Mesh: The Complete Production Process
The creation of a copper alloy wire mesh typically goes through several core steps: raw material preparation, weaving, post-treatment, and inspection. Among these, “weaving” is the key step determining the mesh surface structure.
Pre-weaving Preparation: This includes two key actions:
Warping: Winding rolls of copper alloy wire parallel onto a “warp beam” according to specified length and number of strands, providing the longitudinal “warp” for weaving.
Drafting: Passing each warp thread from the warp beam through different functions of “heddles” on the loom in a designed order, preparing for subsequent opening formation.
Weaving Process (Core Step): The core of weaving, using a loom to interlace warp and weft wires. The key is selecting different “weave types”, detailed in the next section.
Auxiliary Processes: After weaving, a series of treatments may be applied to enhance performance or change appearance:
Annealing: Heating the mesh in a protective atmosphere (e.g., hydrogen or nitrogen) to eliminate internal stress, restore the plasticity of the copper alloy wire, and ensure a flat, non-brittle mesh surface.
Surface Treatment: Adding a “protective layer” to the mesh, such as passivation to form a corrosion-resistant film, or electroplating with tin, nickel, or other metals to enhance durability in specific environments.
Cutting and Packaging: The final step, cutting the rolled mesh into sheets or packaging it in rolls according to customer requirements, ready for shipment.
Quality Inspection: Throughout production, checking mesh opening sizes, surface flatness, and any defects like broken wires or skipped weaves to ensure the final product meets standards.
Mainstream Weave Types: “Designers” of Mesh Structure
The core of the weaving process is selecting different weave types. The table below clearly shows the characteristics and differences of the four mainstream weaves:
| Weave Type | Structural Description | Characteristics & Performance | Applications |
| Plain Weave | Simplest weave. Each warp and weft wire interlaces one over one under, forming square openings. | Stable structure, uniform openings; the most universal and cost-effective weave. | General filtration, electromagnetic shielding, general screening and protection. |
| Twill Weave | Each warp wire crosses over and under every two weft wires (and vice versa), forming a denser diagonal pattern. | Denser and stronger than plain weave, but slightly lower open area. Allows finer wires and higher mesh counts. | High-precision screening, filtration requiring higher strength. |
| Dutch Weave (Dense Mesh) | Different wire diameters and densities for warp and weft; typically warp thicker, weft finer, warp sparse, weft dense. | Extremely high filtration precision, low open area, capable of trapping very fine particles. | Applications demanding high filtration precision, such as catalyst supports, advanced oil filtration. |
| Crimped Weave | Copper wires are pre-bent into a corrugated shape before weaving, interlocking by the corrugations. | Extremely strong structure, no mesh sliding. Rougher surface, high load capacity, but wire diameter and openings are usually coarse. | Heavy-duty screening (e.g., mining, quarries), protective nets, aquaculture cages, etc. |
How to Choose a Weaving Process?
The choice of weaving process depends on the final use of the mesh. For example:
Pursuing high filtration precision: Dutch weave (dense mesh) should be prioritized, as its sparse-warp/dense-weft structure achieves higher filtration precision.
Needing both filtration and strength: Twill weave is a good choice, being denser and stronger than plain weave, suitable for high-precision screening.
Used in heavy screening or protection: The strong structure of crimped weave is well-suited for such high-strength applications.