Needle-punched Felt Production Process

　　4. Needle Punching for Reinforcement: After the fibers are梳理 into a web, they undergo reinforcement treatment using a needle punching machine. The needles on the machine repeatedly pierce the fiber web, causing the fibers to become entangled and interlocked, thereby enhancing the web's strength and stability. Needle density and penetration depth are critical parameters that significantly influence the performance of the needle-punched felt, and these must be precisely controlled according to the specific product requirements.

　　3. Needle Punching: After being carded and laid out, the fiber web is fed into a needle-punching machine for reinforcement. The machine’s speed and the depth of needle penetration must be adjusted according to the thickness of the fiber web and the desired product strength. Additionally, to ensure consistent product quality, worn needles should be regularly inspected and replaced.

　　1. Raw Material Preparation: The primary raw materials for needle-punched felt include various fibers, such as polyester, polypropylene, and nylon. Before use, these materials undergo quality inspection to ensure they are free from impurities and contaminants, followed by necessary pre-treatment steps to enhance fiber cohesion and dispersibility.

　　2. Mixing and Opening: The fiber, which has passed quality inspection, is mixed according to a specific ratio, then fed into an opening machine that breaks apart the compressed fiber clumps into individual fibers, preparing them for the subsequent combing process.

　　3. Carding into a Web: The carding machine is used to further refine the loosened fibers, removing impurities and short fibers in the process. This step ensures that the fibers are evenly distributed as individual strands, which are then formed into a fiber web by the web-forming unit. Throughout this process, it’s crucial to maintain optimal uniformity and density of the fiber web to guarantee the quality of the final product.

　　4. Needle Punching for Reinforcement: After the fibers are梳理 into a web, they undergo reinforcement treatment using a needle punching machine. The needles on the machine repeatedly pierce the fiber web, causing the fibers to become entangled and interlocked, thereby enhancing the web's strength and stability. Needle density and penetration depth are critical parameters that significantly influence the performance of the needle-punched felt, and these must be precisely controlled according to the specific product requirements.

　　5. Post-processing: Depending on requirements, the needle-punched felt can undergo additional treatments such as heat treatment, shaping, and calendering to enhance the product’s appearance, feel, and performance. Furthermore, special processes like coating or lamination can be applied to meet customers’ diverse needs.

　　II. Production Process of the Acupuncture Needle Production Line

　　1. Feeding and Mixing: Introduce different types of fibers into the mixer according to the recipe proportions, ensuring thorough mixing to achieve an even fiber distribution.

　　2. Carding and Web Formation: The blended fibers are processed through a carding machine to separate them into individual strands, which are then mechanically laid down to form a fiber web of specified width and thickness. During this process, the speed of the carding machine and the settings of the web-forming device must be adjusted according to the desired product thickness and density.

　　3. Needle Punching: The fiber web, after being梳理 and laid out, is fed into a needle-punching machine for reinforcement. The speed of the machine and the depth of needle penetration must be adjusted according to the thickness of the fiber web and the desired product strength. Additionally, to maintain product quality, worn needles should be regularly inspected and replaced.

　　4. Molding and Cutting: After needle-punching reinforcement, the fiber felt undergoes processes such as calendering and shaping, and is then cut into products of various sizes and shapes according to customer requirements.

　　5. Inspection and Packaging: Finally, the cut products undergo quality inspection. Those that pass are then packaged, completing the entire production process.

　　Overall, the production process of needle-punched felts involves several core steps: raw material preparation, blending and opening, web formation through carding, needle punching for reinforcement, and subsequent finishing processes. In a real-world needle-punching production line, these steps must work seamlessly together, with precise control of all relevant parameters, to ensure the creation of high-quality, high-performance needle-punched felt products. We hope this article provides readers with a clearer understanding of the needle-punched felt manufacturing process.