In the field of PVC rain gutter production, it has long been plagued by many problems such as material properties and process control, which greatly limits the improvement of product quality and production efficiency. Relying on its strong R&D strength and continuous innovation, Yongte Plastic Machinery has successfully launched a series of PVC rain gutter equipment with significant advantages, opening up a new path for the development of the industry.Due to its poor thermal stability, PVC materials are prone to dehydrochlorination reactions at temperatures above 120°C, and the processing temperature of PVC rain gutter is usually in the range of 180°C - 220°C, which is very easy to cause thermal degradation. Yongte Plastic Machinery's equipment is equipped with a high-precision temperature control system. Using the PID (proportional integral differential) control algorithm, the processing temperature fluctuation can be accurately controlled within the range of ±0.5°C, effectively inhibiting the thermal degradation of PVC, ensuring that the product yellowness index (YI) is less than 5, and the tensile strength is maintained above 30MPa, which is significantly better than the industry average, avoiding product performance degradation due to thermal degradation.
In response to the poor fluidity of PVC, Yongte Plastic Machinery optimizes the screw design and adopts a large aspect ratio (L/D = 25 - 30) screw, which is matched with a high-performance injection pump. Under a low injection pressure of 50 - 80MPa, the PVC melt can be uniformly and quickly filled into the mold cavity at a flow rate of 10 - 20cm³/s, and the incidence of defects such as incomplete mold filling and lack of material is reduced to less than 1%. Through the independently developed cooling control system, the cooling rate is accurately adjusted according to the heat conduction model, and the shrinkage rate of PVC material is controlled at 0.5% - 1.5%, ensuring that the size tolerance of the rain gutter is controlled at ±0.2mm, meeting the high-precision production requirements.The complexity of formula design is the key difficulty in the production of PVC rain gutter. Yongte Plastic Machinery is equipped with an intelligent formula control system. Using multivariable control technology, the control accuracy of the addition of various additives can reach ±0.1%, ensuring the synergistic effect of additives such as stabilizers, plasticizers, and lubricants to optimize product performance. For example, in terms of the control of the amount of stabilizer, it can accurately match the characteristics of PVC materials and extend the thermal stabilization time to 30-40 minutes. For the production of colored rain gutter, it adopts twin-screw dynamic mixing technology and high-speed dispersion device, and the pigment dispersion reaches more than 95%, effectively avoiding color unevenness and fading problems, and meeting the market's stringent demand for diversified colors.
Mold and equipment matching is crucial to product quality and production efficiency. In terms of mold design and manufacturing, Yongte Plastic Machinery uses CAE (Computer Aided Engineering) simulation technology to optimize the mold flow channel, and the pressure drop is controlled at 5-10MPa to ensure that the plastic melt flows evenly in the mold. The mold surface is treated with nano titanium nitride (TiN) coating, and the hardness reaches more than HV2000, which significantly improves wear resistance and demoulding performance. Key components of the equipment, such as screws and barrels, are made of high-performance alloy materials, and their Rockwell hardness (HRC) reaches 50-55, and the equipment operation stability is improved by more than 30%. At the same time, the equipment is equipped with an intelligent control system, which can automatically adjust the process parameters according to the rheological properties of the material and the structural characteristics of the product, increase production efficiency by 20% - 30%, and reduce labor costs by 30% - 40%.
In the process control link, Yongte Plastic Machinery's equipment shows excellent performance. Through real-time monitoring by high-precision sensors, parameters such as temperature, pressure, and speed are precisely controlled. The temperature control accuracy is ±0.3℃, ensuring that the PVC material is molded within the optimal processing window. The injection pressure control accuracy is ±1MPa, and the injection speed adjustment accuracy is ±0.5cm³/s. It can be adjusted in real time according to the changes in the mold cavity, and the product scrap rate is reduced to less than 2%. In the cooling and shaping stage, an efficient circulating cooling system is adopted, and the cooling rate can reach 5 - 10℃/min. Combined with a unique vacuum shaping process, it effectively prevents the rain trough from warping and deformation, and the product size accuracy deviation is controlled at ±0.1mm.The PVC rain trough equipment produced by Yongte Plastic Machinery has achieved remarkable results in improving appearance and quality. By optimizing the mold exhaust system, the exhaust rate is increased to 10-15L/min. Combined with the optimized injection molding process parameters, the incidence of surface defects such as cold spots, silver streaks, weld seams, and bubbles is reduced to less than 3%, and the product surface roughness (Ra) reaches 0.2-0.4μm. The waterproof performance is tested to be leak-free for 24 hours under 1000Pa water pressure. In order to improve the weather resistance and durability of the product, a compound system of ultraviolet absorbers, antioxidants, etc. is introduced, and a surface cross-linking treatment process is adopted. After 2000 hours of artificial accelerated aging test (QUV) of the rain gutter, the tensile strength retention rate is above 80%, which significantly extends the service life of the product.
Yongte Plastic Machinery has set a new benchmark for the PVC rain gutter production industry with its cutting-edge technological advantages in material processing, formula control, mold and equipment optimization, process control, and appearance quality improvement, and has effectively promoted the industry to move towards high quality and high efficiency.
