Used HDPE Double-wall Corrugated Pipe Production Line

Qingdao Shende has decades of experience in plastics machinery manufacturing, and the spirit of "Made in China" has been ingrained into every component of its equipment. The company's R&D team, comprised of industry veterans, developed an extrusion system with a specially designed screw profile that delivers rapid and uniform plasticization of the HDPE feedstock after several revolutions, resulting in 15% higher pipe forming efficiency than conventional equipment. The corrugation mold is constructed from a high-strength alloy that is wear-resistant and durable, resulting in crisp, standard corrugations. Furthermore, the intelligent temperature control system acts like a "thermostatic brain" within the equipment, ensuring temperature fluctuations of no more than ±2°C, ensuring consistent pipe quality. These technologies enable second-hand production lines to deliver outstanding performance, rivaling even new equipment.

Don't assume used equipment is unreliable. Qingdao Shende maintains stringent quality control. Every recycled production line undergoes three stages of testing: First, an inspection team, armed with powerful tools like ultrasonic flaw detectors and thickness gauges, thoroughly inspects core components like the screw and barrel, detecting even the slightest trace of wear. Second, technicians disassemble the equipment, repairing and replacing any necessary repairs, including replacing aging circuitry with new ones, giving the equipment a "fresh look." Third, the equipment undergoes a 72-hour continuous trial run. The resulting bellows must pass over 10 tests, including ring stiffness and impact strength, before they are released to customers. This comprehensive process ensures that the bellows produced can withstand pressures exceeding 6kN/m², making them ideal for municipal projects.

In terms of price, Qingdao Shende's used production lines offer the best value for money. While a brand new production line can easily cost over a million yuan, used equipment here can be priced at over 60% less. One small business not only didn't spend much on the equipment after purchasing it, but also used the savings to purchase high-quality raw materials and explore the market. Within six months, their business was booming, and their market share increased by 20%. Everyone knows the value of spending little to achieve great results.

Qingdao Shende offers exceptional after-sales service. Their after-sales team is available 24/7. No matter what time you call, someone will respond and arrive within 48 hours. Upon arrival, engineers will visit to install and debug the equipment, and they will also provide three days of free operator training to ensure everyone is proficient. During normal production, they monitor equipment operation via a remote system, providing early warning of any issues. The spare parts warehouse holds over 200 parts on standby, with nationwide delivery within 48 hours, ensuring minimal production downtime.

Qingdao Shende's second-hand HDPE double-wall corrugated pipe production line, backed by China's intelligent manufacturing, offers exceptional quality, affordable pricing, attentive after-sales service, and exceptionally stable performance. By choosing it, companies can produce high-quality corrugated pipes smoothly without spending a lot of money, gain a firm foothold in the market competition, and expand their pipeline business!

Our company specializes in producing PE double-wall corrugated pipe equipment and PP fresh air duct production lines. The equipment includes extruders, molds, forming machines, forming dies, cutting machines, and winders. Our double-wall corrugated pipe equipment is constructed in strict accordance with design specifications and complies with all national standards. In particular, our double-wall corrugated pipe molds and forming machines are all newly designed, featuring attractive appearance, low energy consumption, and high production output. Since their introduction, they have been favored by customers and have earned a good reputation in the industry. A brief introduction to the equipment is as follows:

1. Extruder

There are many types of extruders. Single-screw extruders and conical twin-screw extruders are primarily used in double-wall corrugated pipe production. Single-screw extruders are primarily used for HDPE double-wall corrugated pipe production. The specific model depends on the diameter of the corrugated pipe being produced and whether it is single-wall or double-wall. They are primarily designed for producing granular plastics with good fluidity and easy plasticization. They are characterized by their simple structure. Commonly used models include the SJ45, SJ50, and SJ65. They feature mature technology, stable performance, and easy maintenance. After a brief pre-job training, you can begin operating. Conical twin-screw extruders are primarily designed for PVC resin powder. Due to the instability of PVC during the heating and plasticization process, various auxiliary materials, such as titanium dioxide, CPE, and paraffin, are required to achieve optimal production. Therefore, before entering the extruder, the materials must be mixed in a mixer according to a specific ratio. Only after the process requirements are met can they enter the extruder for extrusion. Conical twin-screw extruders are characterized by fast material intake, excellent shearing and plasticizing effects, and, when equipped with a forced feeder, stable extrusion.

2. Extrusion Die

Extrusion dies, commonly known as die heads, are divided into two main categories: double-wall die heads and single-wall die heads. Dies are also categorized into spiral and bracket types, specifically designed for different materials. For example, a PE die head requires the addition of auxiliary materials and requires excellent plasticizing and high production output. A spiral die head is therefore ideal. Both the inner and outer mold layers feature a spiral flow channel design, resulting in better material density, more stable discharge, and higher production output. A bracket-type die head is generally used for the production of standard PE or PVC double-wall corrugated pipes. Its linear flow splitter design offers a simple structure, ease of processing, and low cost. The mold is typically made of 40Cr steel, which has been tempered. The flow channel is hard chrome plated and then polished to ensure smoothness and durability.

3. Molding Machine

The molding machine essentially consists of two parts: the machine base and the forming mold. The base frame is constructed of carbon steel with stress relief and rust prevention treatment. The guide rails and water tank are all made of 40Cr steel, processed through a series of standard processes including tempering, nitriding, and polishing. The molding machine mainly consists of several parts: 1. Base frame, 2. Support frame, 3. Table, 4. Mold guide rail, 5. Cooling water tank, 6. Pressing roller device, 7. Vacuum device, 8. Lubrication system, 9. Lifting mechanism, 10. Machine moving device, 11. Air cooling system. 12. Water cooling system.