ID 3 inches OD 8 inches Double-layer ABS Spool

China ID 3 inches OD 8 inches Double-layer ABS spool by Hongkai Plastic factory, the production process for ABS spool cores differs from that of ABS tubes. It is not entirely achieved through direct molding or a single injection molding process, but rather combines extrusion molding with mold shaping technology: First, raw material processing involves drying ABS resin in an oven at 70-80°C for 4 hours, strictly controlling moisture content to ≤0.1% to prevent bubbles or material degradation during processing; Subsequently, plasticization and extrusion occur via a single-screw extruder, heating the ABS to a molten state. The temperatures are controlled as follows: 150-165°C in the feeding section, 165-180°C in the plasticizing section, and 170-180°C in the homogenizing section. Concurrently, the screw length-to-diameter ratio is maintained at 12-18:1, and a compression ratio of 3-4:1 to achieve uniform plasticization and form a continuous pipe blank. The blank is then shaped using a specially designed mold maintained at 175-190°C. Its final form is imparted directly through an internal triangular-external octagonal groove structure. After passing through the shaping mold, the pipe blank enters a 25cm-long water tank for cooling and setting. with water temperature controlled at 20-30°C to solidify the structure and minimize deformation. The cooled tubes are then pulled by a traction machine to a cutting machine, where they are automatically trimmed to preset dimensions for final production. This process offers significant advantages: In structural precision, mold forming creates complex internal triangular and external octagonal structures in a single step, eliminating subsequent processing errors. Dimensional tolerances are strictly controlled within ±0.1mm, making it particularly suitable for high-precision applications like lithium battery separator spools, ensuring winding flatness and stability. In terms of production efficiency and cost, extrusion enables continuous production with a single line achieving daily output of 500-1000 meters, making it highly suitable for large-scale orders. After amortizing mold costs, unit costs are reduced by 40-60% compared to metal processing, offering outstanding cost-effectiveness. Regarding material adaptability, ABS resin offers excellent chemical resistance, surface gloss, and processing fluidity, making it an ideal material for core tubes. Strength can be further enhanced through modifications like glass fiber reinforcement to meet diverse load-bearing requirements.

The fundamental structural parameters of the ID 3 inches OD 8 inches Double-layer ABS spool are meticulously engineered to meet high-end industrial requirements: its inner tube diameter of three inches serves as the core dimension for the inner support structure of the core cylinder, directly impacting internal space utilization. For instance, in lithium battery separator winding processes, this inner diameter must precisely match the separator winding tension control system to ensure winding flatness. The outer tube's 8-inch ID determines the core's overall load-bearing capacity. Combined with a 6mm wall thickness, this design optimizes material utilization while ensuring structural integrity. This product exhibits exceptional thermal resistance, supporting extreme environment testing from -40°C to 120°C, making it particularly suitable for high-temperature curing processes in lithium battery production. Utilizing a low-shrinkage formulation significantly enhances dimensional stability, extending service life beyond five years and effectively reducing customer equipment replacement costs. Regarding environmental performance, the ABS core shaft has passed SGS authoritative testing, fully meeting the stringent recyclability requirements for materials in the new energy industry. Its surface finish achieves industry-leading standards, with core surface roughness Ra controlled at ≤0.8μm. For premium applications demanding ≤0.5μm, this precision machining substantially reduces friction resistance during separator winding, minimizes static electricity generation, and prevents separator contamination or surface scratches. Consequently, battery yield rates improve by over 5%. This surface quality is achieved through vacuum-calibrated extrusion equipment and 12 stringent quality control processes, supported by full-process digital traceability. Notably, the machining precision of the core tube directly impacts battery performance: its dimensional accuracy ensures battery internal resistance consistency within a 15%-20% variation range. Furthermore, after 1,000 charge-discharge cycles, it enhances battery capacity retention by 5%-8%, providing critical assurance for the long-term reliability of power batteries.