Conductor Material: The conductors of this series of cables are made of high - purity electrolytic copper. High - purity electrolytic copper has excellent conductivity, which can effectively reduce losses during power transmission and ensure the efficiency of power transmission. At the same time, it has good ductility and Flexibility, which is not easy to break during cable production and laying, and is easy to process and install. Moreover, an oxide film is easily formed on the surface of electrolytic copper, which can prevent the conductor from being corroded to a certain extent and prolong the service life of the cable.

Insulation Material: The insulation layer is made of polyvinyl chloride (PVC) material. PVC Insulation Material has good insulation performance, which can effectively insulate current and prevent electric leakage accidents. It has good chemical stability and is not easy to be eroded by general chemical substances. At the same time, the cost of PVC material is relatively low, which makes the overall cost of the cable more advantageous. However, the temperature resistance of PVC Insulation material is limited, and it is generally suitable for occasions where the ambient temperature does not exceed 70℃.

Sheath material: The sheath is also made of PVC material and is black. The black PVC Sheath has good light resistance, can resist ultraviolet radiation, and reduce aging caused by direct sunlight. At the same time, the PVC sheath has certain mechanical strength, which can effectively protect the internal conductors and insulation layers of the cable from external extrusion, collision and friction. In addition, the PVC sheath also has certain water resistance and moisture resistance, which can prevent moisture from entering the cable and affecting its performance.

Style design: The cable has an overall circular structure, which has low resistance during laying and is more convenient for both pipe laying and direct burial laying. The outer diameter of the cable varies according to the specification. The outer diameter of the 5X50mm cable is larger, about 20 - 25mm; the outer diameter of the 5X2.5mm cable is smaller, about 8 - 10mm. The surface of the cable is smooth, with clear marks such as specification model, rated voltage and manufacturer printed on it, which is convenient for users to identify and query relevant information.

Conductor manufacturing: First, the high - purity electrolytic copper raw material is smelted to remove impurities and improve the purity of copper. Then, the copper rod is made by continuous casting process, and the diameter of the copper rod is adjusted according to the specification of the final conductor. Next, the copper rod is drawn through a wire drawing die to form a Copper Wire with the required diameter. For conductors that need to be stranded by multiple copper wires, multiple copper wires are stranded according to a certain stranding direction and pitch to form a complete conductor. During the stranding process, it is necessary to ensure that the copper wires are arranged closely and evenly to ensure the conductivity and mechanical strength of the conductor.

Insulation extrusion: The extrusion molding process is used to coat the insulation layer on the surface of the conductor. The PVC insulation material is added to the extruder, heated and melted, and then evenly coated on the surface of the conductor through an extrusion die. During the extrusion process, parameters such as extrusion temperature and extrusion speed must be strictly controlled to ensure that the insulation layer has uniform thickness, a smooth surface, and no defects such as bubbles and impurities. The thickness of the insulation layer is accurately controlled according to the specification of the cable and insulation requirements to ensure that its insulation performance meets relevant standards.

Cabling process: For cables composed of multiple Insulated Conductors, cabling treatment is required. Multiple insulated conductors are stranded together according to a certain stranding method and pitch to form a cable core. During the stranding process, in order to ensure the roundness and stability of the cable core, some filling materials, such as polypropylene rope, may be filled between the conductors. The filling material should have certain elasticity and flexibility and be able to withstand the pressure during the stranding process. After cabling, the outer diameter of the cable core should meet the design requirements.

Sheath extrusion: The sheath is coated on the surface of the cabled core by extrusion molding process. The black PVC sheath material is added to the extruder, heated and melted, and then coated on the surface of the cable core through an extrusion die. During the extrusion process, the extrusion parameters must be controlled to ensure that the sheath has uniform thickness, fits closely on the surface of the cable core, and has no problems such as wrinkles and cracks. The thickness of the sheath is determined according to the specification of the cable and the requirements of the use environment to ensure that it has sufficient mechanical protection performance.

Inspection process: After the cable production is completed, a series of inspections are required. Including conductor resistance test to check whether the conductivity of the conductor meets the standard; insulation resistance test and withstand voltage test to inspect the insulation performance of the insulation layer; mechanical performance tests of the sheath, such as tensile strength and elongation at break, to ensure that the sheath quality is qualified. At the same time, the appearance of the cable should also be inspected to check for defects such as surface scratches, bulges and depressions. Only cables that pass all inspection items can be sold.

Transportation mode: Different transportation modes can be selected according to the transportation distance, transportation volume and customer needs. Truck transportation is generally used for short - distance transportation. Truck transportation has high flexibility and can directly deliver the cable to the customer's designated location, which is suitable for small - batch and multi - batch transportation. For long - distance transportation, railway transportation or road freight 专线 can be chosen. Railway transportation has a large transportation capacity and good stability, which is suitable for long - distance transportation of large quantities of cables; road freight 专线 can provide door - to - door service, and the transportation time is relatively short, which is suitable for customers who have certain requirements for transportation time. For exported cables, sea freight or air freight can also be chosen. Sea freight has a low cost but a long transportation time; air freight is fast but has a high cost, which is suitable for emergency orders.

Transportation precautions: Before transportation, the packaging of the cable should be inspected to ensure that the packaging is intact and firm to prevent damage to the cable during transportation. When loading the cable, avoid extrusion, collision and severe vibration of the cable. The cable reel should be placed stably and fixed firmly to prevent rolling during transportation. Coiled cables should be stacked neatly, and avoid stacking too high to prevent the bottom cables from being crushed. During transportation, avoid direct sunlight, rain and snow on the cable to prevent the cable from being affected by temperature and humidity changes. At the same time, keep away from fire sources, heat sources and corrosive substances to avoid damage to the cable. The transport vehicle should drive smoothly, avoid sudden braking, sharp turns and other operations to reduce the impact on the cable.

Transportation tracking: For important transportation orders, the company will provide transportation tracking services. Through the logistics information system, the transportation location and transportation status of the cable are monitored in real time. Customers can know the transportation progress of the cable through the query method provided by the company. If abnormal situations occur during transportation, such as transportation delay and package damage, the company will timely communicate and coordinate with the logistics company, take corresponding solutions, and timely notify the customer.

Delivery process: After the customer places an order, the salesperson will verify the order information, including the specification model, quantity, delivery address, delivery time of the cable, etc. After verification, the order information is transmitted to the warehouse. Warehouse personnel prepare goods according to the order information, retrieve the corresponding cable from the inventory, and inspect the specification, quantity and appearance of the cable to ensure that it meets the order requirements. After passing the inspection, the cable is packaged according to the specified packaging method. After packaging, the cable is handed over to the logistics department, which arranges transport vehicles and goes through relevant transportation procedures. After delivery, the salesperson will promptly notify the customer of the delivery information, including the transportation mode, license plate number, estimated arrival time, etc.

Delivery time: When the inventory is sufficient, for cables of conventional specifications, delivery is generally completed within 1 - 3 working days after receiving the order. If the customer orders cables of special specifications that need to be produced, the delivery time will be determined according to the production cycle, and will generally be shipped within 7 - 15 working days. The company will communicate the delivery time with the customer in advance to ensure that the customer knows the delivery progress of the cable. In case of delivery delay caused by force majeure, the company will notify the customer in time and explain the reason, and negotiate solutions.

Delivery documents: Relevant delivery documents will be provided with the goods when delivering, including product certificate, inspection report, packing list, invoice, etc. The product certificate and inspection report prove that the quality of the cable meets relevant standards; the packing list details the specification, quantity and packaging of the cable, which is convenient for the customer to check when receiving the goods; the invoice serves as the basis for the customer's payment and financial settlement. These documents will be properly packaged and sent together with the cable to ensure that the customer can receive them smoothly.

Sample provision: In order to enable customers to better understand the quality, specification and performance of the cable, the company provides sample services. Customers can apply for samples from the company by phone, email, online consultation, etc., indicating the specification and model of the required samples. After receiving the sample application, the company will review it within 1 - 2 working days. After approval, sample preparation will be arranged. The length of the sample is generally 1 - 2 meters, which can meet the customer's inspection needs for the appearance, specification, material and other aspects of the cable.

Sample cost: The samples themselves are provided to customers free of charge, but the transportation cost of the samples is borne by the customer. Customers can choose to pay the freight by cash on delivery or pay the freight to the company in advance. For large customers with clear purchase intentions, after being reviewed by the company, the transportation cost of samples can be reduced or exempted.

Sample feedback: After receiving the samples, if customers have any questions or suggestions, they can contact the company in time. The company will arrange professionals to answer customers' questions and record customers' feedback. If the customer is satisfied with the sample and intends to make a bulk purchase, the company will provide the customer with a detailed product quotation and purchase plan. If the customer has suggestions for improvement on the sample, the company will carefully study and adjust and optimize according to the customer's needs.

Quality assurance: The company provides quality assurance for this series of PVC black cables. The warranty period of the product is 12 months from the date the customer receives the goods. During the warranty period, if the cable cannot be used normally due to its own quality problems (such as damage caused by non - human factors such as insulation layer cracking and conductor breaking), the customer can apply for after - sales treatment to the company with the purchase certificate and product certificate. The company will provide customers with free repair, replacement and other services according to the actual situation.

After - sales consultation: During the use of the cable, if customers have any questions, such as cable installation, use methods, troubleshooting, etc., they can consult through the company's after - sales service phone, online customer service, email and other ways. The company's after - sales personnel will respond to customers' consultations within 24 hours and provide professional and detailed answers and guidance.

Fault handling: If the cable fails during use, the customer can report the fault to the company's after - sales department. After - sales personnel will first understand the fault situation and make a preliminary judgment through phone or online communication. For simple faults, guide customers to handle them by themselves; for complex faults, the company will arrange technical personnel to go to the site for maintenance. After arriving at the site, the technical personnel will test the faulty cable, determine the cause of the fault, and take corresponding maintenance measures.

Return and exchange service: If the cable received by the customer has problems such as wrong specification model, appearance damage, unqualified quality, etc., and it is not caused by the customer themselves, the customer can apply for return or exchange within 7 days after receiving the goods. Customers need to provide relevant photos and evidence to the company. After receiving the application, the company will review it within 2 working days. After approval, it will handle the return or exchange procedures for the customer