Model SJ-45 SJ-65 SJ-80 SJ-90 SJ-120 Screw Diameter (mm) 45 65 80 90 120 L/D Ratio 25:1 25/28:1 25/28:1 25/28:1 25:1 Motor Power (kW) 7.5 11–15 15–18.5 18.5–22 45 Screw Speed (r/min) 30–100 30–100 30–100 30–100 30–100 Output (kg/h) 15–25 30–70 50–100 80–180 200–350 Applications: This production line is designed for manufacturing plastic pipes and profiled extrusions of various specifications, primarily producing pipes with diverse diameters and wall thicknesses used in agricultural irrigation and drainage, building water supply and drainage, and cable laying applications. It is suitable for producing pipes made from materials such as PP, PE, PS, ABS, PVC, PPC, and other resins. Specialized barrel and screw designs ensure efficient extrusion and excellent plasticization performance. Analysis of Plastic Pipe Production Lines: As an important component of chemical building materials, plastic pipes are widely favored by users due to their superior properties—hygienic, environmentally friendly, and energy-efficient. The main types include UPVC drainage pipes, UPVC water supply pipes, aluminum-plastic composite pipes, and polyethylene (PE) water supply pipes. A typical pipe production line consists of a control system, extruders, die heads, a sizing and cooling system, a haul-off unit, a planetary cutting device, and a material-receiving rack. Each production line typically includes two extruders: the primary extruder features a high‑capacity conveying sleeve and an efficient screw design, while the secondary smaller extruder is used to produce marking lines. When a plastic pipe production line malfunctions, it can result in surface roughness, internal vibration rings, or lack of vacuum—issues that directly affect product quality. Therefore, timely troubleshooting and maintenance of the production line are essential to ensure consistent product quality.

Model SJ-30 SJ-65 SJ-80 SJ-90 SJ-105 Screw Diameter (mm) 30 65 80 90 105 L/D Ratio 25:1 25:1 25:1 / 30:1 25:1 / 30:1 20:1 Motor Power (kW) 2.2 7.5 11–15 15–18.5 22 Machine Center Height (mm) 850 850 850 1000 1000 Screw Speed (r/min) 60 60 60 60 60 Output (kg/h) 5–8 40–80 80–150 150–250 220–330 Applications and Features: PVC plastic sealing strip production line, window and door sealing strip production line—this production line consists of a single-screw extruder, molds, water tanks, traction units, and winding machines. Different molds can produce PVC sealing products in various shapes and sizes. These products are widely used for manufacturing sealing strips for PVC windows and doors, automobiles, shipping containers, electric vehicles, refrigerators, sterilization cabinets, and more. PVC Plastic Seal Strip Extruder: The PVC seal strip extruder is designed to manufacture sealing strips extensively used in car doors, windows, vehicle bodies, seats, sunroofs, engine compartments, and trunks. These strips play crucial roles such as waterproofing, sealing, sound insulation, dust prevention, frost resistance, shock absorption, heat retention, and energy conservation. The material must exhibit high tensile strength, good elasticity, as well as excellent temperature resistance and aging resistance. To ensure tight bonding between the seal strip and the profile, the cross-sectional dimensions of the seal strip must match those of the profile. The plastic seal strip production line is primarily used to manufacture automotive sealing strips, soft plastic strips, hard plastic strips, PVC window and door sealing strips, transparent soft-hard co-extruded water-stop strips, shower room sealing strips, soft-hard co-extruded water barriers for shower rooms, rubber strips for automobile windshield wipers, soft-hard co-extruded channel profiles, foldable double-layer price tags, dual-function price tags, and various other soft-hard co-extruded strips. Key Advantages: 1. Special barrel and screw design ensures high-speed extrusion and excellent plasticization. 2. Vacuum sizing and cooling guarantee precise roundness and uniform wall thickness. 3. Multi-V-belt traction system with stepless variable-frequency speed control and imported PU multi-V belts provides stable operation across different extrusion speeds. 4. Automatic reel changer enables continuous operation without downtime, rapid reel changes, and neatly arranged reels.

Model SJ-30 SJ-65 SJ-80 SJ-90 SJ-105 Screw Diameter (mm) 30 65 80 90 105 L/D Ratio 25:1 25:1 25/30:1 25/30:1 20:1 Motor Power (kW) 2.2 7.5 11 15–18.5 22 Screw Speed (r/min) 60 60 60 60 60 Output (kg/h) 5–8 40–80 80–150 150–250 220–330 Applications and Features: The single-screw plastic profile extrusion line is primarily used for processing PVC, PC, PE, and other plastic profiles. The production line consists of a single-screw extruder, vacuum calibration table, haul-off unit, automatic cutter, material rack, and more. By equipping different molds, it can produce various plastic profiles, including window and door profiles, container sealing strips, sheets, rods, ceiling panels, and other products. This process features a simple workflow, high output, stable quality, and low cost. Classification and Overview of Plastic Profiles: Plastic profiles refer to extruded plastic products with non-circular cross-sections—any shape other than round, square, or flat, such as corrugated, grooved, T-shaped, etc. These profiles are typically made mainly from plastics, sometimes incorporating metal components, and are widely utilized in construction, interior decoration, and related industries. There are two main types of plastic profiles: all-plastic profiles and composite profiles, which combine plastic materials with non-plastic materials. 1. Based on the hardness of the profile, they can be categorized into soft profiles and rigid profiles. According to the type of plastic used, they include PVC profiles, ABS profiles, PE profiles, and others, with PVC profiles being the most common. 2. Classified by cross-sectional characteristics, plastic profiles can be divided into seven major categories: hollow tubes, hollow profiles, plug-type profiles, open-profiles, segmented profiles, inlaid profiles, and solid profiles.

Model Length-to-diameter ratio Motor power (kW) Dimensions (mm) Production rate (m/h) SJ-65 25:1 11 15–25 1400 SJ-80 25:1 15 27–35 2000 Applications: This production line is a specialized unit for manufacturing U‑shaped decorative sealing strips, composed of metal sheets and rubber/plastic materials. It is typically used on sheet metal, steel plates, glass, and other sharp edges. The U‑shaped decorative sealing strip not only protects the edges but also serves as an aesthetic element. It finds extensive applications in cabinets, automobiles, electrical appliances, banking equipment, refrigerators, doors and windows, interior decoration, machinery, and more. Overview of the Decorative Strip Production Line: The Shuangda brand PVC plastic decorative panel production line employs a processing technique that uses polyvinyl chloride powder as the primary raw material. After thorough mixing, various additives such as composite stabilizers and reinforcing agents are incorporated to produce PVC plastic panels and wood‑plastic composite panels. These products feature light weight, high toughness, easy installation, water resistance, and insect‑proof properties. Their surface patterns and colors offer great variety, while they remain resistant to stains and easy to clean. Additionally, they provide excellent sound insulation and thermal insulation. Notably, new processes incorporate flame‑retardant materials, enabling the panels to self‑extinguish upon removal from the flame, thus enhancing safety during use. The main equipment of this production line boasts uniform plasticization, low shear rates, high output, and long service life. Vacuum forming allows for mold‑specific sizing options—such as 4 m, 6 m, or 8 m configurations—while the traction machine operates smoothly, ensuring no pressure marks on the finished product, reliable performance, and strong pulling force to meet high-speed extrusion requirements. The automatic cutting machine maintains synchronized movement with the traction speed, featuring well‑designed mechanisms for stable operation and automated fixed-length cutting. This production line manufactures various types of skirting boards, small profiled trims, decorative moldings, cable channels, baseboards, edge strips, custom-shaped profiles for doors and windows, decorative profiles, and more, widely applied in indoor and outdoor decoration across industries, automotive, shipbuilding, railway, and residential sectors.