In power cabling projects, various conductors require standardized interconnection components to complete line connections. Terminal blocks and junction boxes are filled with layered, multi-specification conductive connectors, categorized into single-layer and double-layer structures, adaptable to different application scenarios such as current transmission, voltage detection, general wiring, and separable lines. Sufficient contact crimping area is the core foundation for ensuring stable conductivity and carrying the rated current. Pressed Copper Stamping Sheets are the most crucial raw material for manufacturing these conductive connectors. Below is a professional interpretation of the component classification and molding process.
Conductive connectors are mainly processed from copper, brass, and phosphor bronze. They typically have a shovel-shaped, rounded head structure, with a pre-drilled screw locking position on one end and the other end used to wrap the copper core of the cable after the insulation layer has been stripped. Products are divided into two types: oil-filled and tube-crimped. The oil-filled type offers superior sealing and protection performance. To isolate the components from air and delay oxidation and blackening, electroplating is applied to the surface for protection. Common plating layers include aluminum, nickel, copper, and nickel-copper alloys. Leveraging the excellent ductility of the Progressive Die Stamping Service with Copper Parts, the electroplating layer adheres evenly to the component surface, providing long-lasting corrosion resistance.
The mainstream base material for conductive components is copper, which has low yield strength and outstanding plasticity and ductility. Finished products are mostly axisymmetric structures, suitable for cold extrusion and integral molding processes. Cold extrusion of tubing is divided into two processes: extrusion with a mandrel and extrusion without a mandrel. The mandrel-based process allows for precise control of the tubing's inner diameter, but the die structure is complex, and it is mostly used for workpieces with strict wall thickness requirements. In mandrel-less processing, the workpiece extends axially, and the wall thickness increases slightly, making it suitable for products with more dimensional tolerances. Components processed using Copper Stamped Pressing Cutting Assembly Parts mostly use this process.
The mandrel-less cold extrusion die has no built-in mandrel, resulting in a simpler overall structure, lower processing and assembly costs, convenient on-site operation, and higher overall production efficiency. A single extrusion can achieve large-section shrinkage molding, significantly reducing repetitive deformation processes. For the conductive components processed in this project, there are no stringent standards for internal hole and wall thickness accuracy. Considering both production cost and capacity, the mandrel-less cold extrusion molding solution was ultimately chosen. The entire processing flow is suitable for the semi-finished product processing needs of Progressive Die Stamping Service with Copper Parts after batch sheet metal stamping.
The cold extrusion molding die adopts a modular combination structure, with a standardized complete production cycle: First, the upper die is raised, and the cut Copper Stamped Components For Electrical Equipments blank is vertically placed in the lower die cavity; the upper die is driven down to complete the extrusion shaping, and after fitting, it quickly rises back to its original position; the matching ejector mechanism simultaneously pushes the formed conductive component out from the lower die. A qualified semi-finished product can be produced in a single cycle, seamlessly connecting to subsequent electroplating and quality inspection processes.
Our complete molding and processing solution takes into account raw material characteristics, processing costs, and mass production needs. Relying on standardized sheet metal stamping and cold extrusion composite processes, it can stably produce circuit interconnect components that meet corrosion resistance and conductivity standards. From basic sheet metal selection to molding process selection, every step is optimized around conductivity requirements. Our self-developed Pressed Copper Stamping Sheet uses high-purity copper as its base material, exhibiting uniform plasticity and low conductivity loss. It is suitable for various cold extrusion and stamping processes and can be customized in thickness and specifications to perfectly match all material requirements for the mass production of electrical conductive connectors. Engineering manufacturers with sheet metal sample testing or bulk purchasing needs are welcome to contact us for consultation and order placement.
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