Qingdao, China – In the global plastic machine manufacturing market, Qingdao Xinrui Plastic Machinery Co., Ltd. has established itself as a leader in the field of PVC profile extrusion lines thanks to its exceptional innovative capabilities and precise technologies. The company specializes in providing global clients with comprehensive automated solutions - from design and manufacturing to installation and commissioning. Its production lines are widely used to produce various high quality decorative PVC profiles such as Baguette, Harpoon PVC, Stub and Corner - popular products that meet international standards and are exported to Russia, CIS countries and Europe.
Qingdao Xinrui deeply understands the needs of the end market.
Baguette: Used for exquisite decoration of ceilings and walls, it requires clear lines, dimensional stability and high surface quality. Xinrui lines ensure contour precision and color uniformity, greatly enhancing the aesthetic value of the interior.
Harpoon PVC: A key component of modern suspended ceiling systems, its dimensional accuracy and mechanical strength are critical. Xinrui technology guarantees tight adhesion and durability, ensuring ease of installation and structural reliability.
Plug: A small but important detail that affects the aesthetics and safety of the product. The lines make it possible to efficiently produce plugs of complex shapes, ideal for sealing the ends of various profiles.
Corner: Serves to protect corners from impacts and performs a decorative function. Requires good toughness and straightness. Profiles produced on Xinrui lines are characterized by dimensional stability and excellent durability.
The successful mass production of these diverse products is made possible by the stable, efficient and intelligent equipment supplied by Qingdao Xinrui. Let's take a closer look at the key components of a complete PVC profile extrusion line.
A complete PVC profile extrusion line is a well-coordinated system where each device plays an irreplaceable role.
1. Extruder: The “heart” of the production line
The extruder is the source and driving force of the entire process. Its main function is to supply PVC compound (powder or granules) through a loading hopper into a cylinder, where the material melts under the influence of electric heating and the enormous frictional force created by a rotating screw, turning into a homogeneous molten mass. The screw then continuously and with constant sufficient pressure supplies the melt to the die.
Qingdao Xinrui extruders use advanced variable frequency drives to precisely control the screw speed, ensuring extrusion stability. The sophisticated screw design (barrier type, BM) ensures highly efficient melting, homogeneous mixing and low temperature extrusion, preventing material degradation, which is the basis for high internal and external quality of the final product.
2. Die (Head): “Creator” of the product
The die is the key element that gives the plastic its shape and size. It receives molten material from the extruder and distributes it evenly through carefully designed internal channels, forming a continuous billet with the required cross-section. The precision of die design and manufacture directly determines the geometry, dimensional accuracy, density and surface texture of the product.
For the production of profiles with complex cross-sections, such as Baguette and Harpoon, Qingdao Xinrui uses computational fluid dynamics (CFD) to analyze melt flow, optimizing channel design. This ensures uniform melt speed and pressure in the die cavity, producing high-precision profiles with uniform wall thickness and low internal stress, which lays the foundation for subsequent cooling and sizing.
3. Calibration table and Vacuum calibration: “Guarantor” of accuracy
The hot billet emerging from the die is already shaped, but is still soft and easily deformed. The key element of the sizing table, the vacuum sizing bath, is designed to immediately cool and accurately shape the workpiece.
The profile passes through several sections of vacuum calibrators on the table. Calibrators have precise holes or slots; the vacuum created presses the soft walls of the profile against the cooled inner walls of the calibrator, and circulating water quickly removes heat, hardening and fixing the profile to the exact final dimensions and shape. The length and number of sizing sections are critical to production speed and cooling efficiency. Xinrui equipment effectively controls the cooling process, preventing deformation and uneven shrinkage.
4. Pulling device (Tyanuch): “Conductor” of rhythm
The pulling device is located after the calibration table. Its main function is to provide a stable, adjustable and continuous pulling force. It captures the already cooled profile and evenly pulls it out of the die, transferring it to subsequent equipment. Its operation must be strictly synchronized with the speed of the extruder.
If the thrust speed is too high, the profile will thin or tear; if too low, material will accumulate at the die. Qingdao Xinrui pulling devices adopt a caterpillar (conveyor) design with uniformly adjustable pressure. The traction speed is precisely controlled by PLC, which guarantees a smooth and continuous process, which is the key to the stability of the profile length and cross-section.
5. Cutting device (Saw): “Final chord”
Continuously produced profiles must be cut into fixed lengths required by the customer. A cutting device (usually a planetary saw or a saw with a movable carriage) is designed to cut a moving profile into pieces of a given length in coordination with a pulling device.
It is driven by a servo system that instantly synchronizes the speed of the saw with the speed of the profile thrust, cutting in motion (“flying saw”). This ensures a clean cut without chips or burrs. The cut profiles are automatically placed on the receiving table for subsequent packaging. Automatic cutting not only improves efficiency, but also ensures standardization and uniformity of the products supplied.
Qingdao Xinrui Plastic Machinery Co., Ltd. offers not just a set of individual devices, but complex, optimized and highly integrated turnkey solutions. The company has a strong R&D base and modern production equipment, and adheres to a strict quality control system at every stage - from raw materials to finished products.
For investors seeking high quality production decorative PVC profiles(baguette, harpoon, plug, angle, etc.), choosing Qingdao Xinrui means choosing stable performance, superior product quality, low operating costs and reliable technical support. The company's products are CE certified and supplied worldwide, earning the trust of companies such as Sharp Polymer.
Looking to the future: Qingdao Xinrui will continue to focus on technological innovation, striving to provide the global plastics processing community with more intelligent, green and efficient extrusion equipment, creating success together with partners.
No.889, West Beijing Street, Jiaozhou, Qingdao, Shandong Province, China
