20 years of R&D and production experience of plastic extruder machines.

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Now our company has formed in Pipe production line/Plate production line/Profile production line three series of plastic extrusion line’s design, manufacture and development of comprehensive ability, meanwhile we can also provide customers the auxiliary equipment, various of molds and parts processing service!

800mm Large Diameter HDPE/MDPE Water Supply and Gas Supply Pipe Extrusion Machine
800mm Large Diameter HDPE/MDPE Water Supply and Gas Supply Pipe Extrusion Machine
Performance and advantages: The HDPE/MDPE water supply pipe and gas pipe production line independently developed by Changjie Company has a unique structure, high degree of automation, convenient operation, stable and reliable continuous production. The pipeline produced by this production line has moderate rigidity, strength, good flexibility, creep resistance, environmental stress crack resistance and good thermal welding performance. It has become the first choice for urban gas pipelines and outdoor water supply pipes.
Professional Plastic Pipe Making Machine manufacturers
Professional Plastic Pipe Making Machine manufacturers
Advantages of PVC pipes:1. Excellent in chemical corrosion, no rust;2. With self extinguishing and flame retardant;3. Excellent in anti aging, can be used 20years to 50 years between the temperature from subzero 15 to 60 degrees Celsius;4. Wall is smooth, inner wall surface tension, it is difficult to form scale, the fluid transport capacity of 43.7% higher than the cast iron pipe;5. The weight is light, easy to flaring, bonding, bending, welding, pipe installation workload is only 1 / 2 to the steel pipes, low labor intensity, short duration;6. Good electrical properties of resistance, volume resistance of 1 to 3 x 105Ω.cm, breakdown voltage 23 to 2kv/mm;7. The toughness of PVC pipe is low, linear expansion coefficient is high, operating temperature range is narrow.
PE PP masterbatch pelletizing line recycling granulator machine
PE PP masterbatch pelletizing line recycling granulator machine
The PE/PP strand pelletizing production line consists of five units: plastic extruder, cooling water tank, blow dryer, pelletizer. The total length is about 12 meters. It is suitable for PVC, PP, PE, ABS, PS, etc. Granulation of other engineering plastics. The PE/PP strand pelletizing production line adopts a special screw design and different configurations, which is suitable for the production of PP, PE, PET, PS, ABS, PA, PVC, PC, POM, EVA, PMMA and other plastics for recycling and color mixing. grain. The main engine gearbox adopts a high-torque design to achieve low noise and stable operation. After special surface treatment, the screw and barrel have the characteristics of abrasion resistance, good mixing effect and high output. The design of vacuum exhaust and natural exhaust port can remove moisture and exhaust gas during the production process, so that the output is more stable, the rubber particles are more dense, and the excellent quality of the product is guaranteed. The hob-type pelletizer has the characteristics of stable rotation, uniform rotation, energy saving and power saving, and safe operation. Its special mold design makes the particles more uniform. The unique design and hardening treatment of the cutter make the equipment life longer.
PPR Pipe Production Line Extrusion Machine
PPR Pipe Production Line Extrusion Machine
PPR Pipe Production Line Extrusion MachineRaw material + color masterbatch → mixing → vacuum feeding → raw material drying → single screw extruder → color line extruder → Mould → sizing sleeve → spray vacuum setting tank → spray cooling water tank → inkjet printer → tractor → finished product inspection and packagingThe PPR pipe production line uses a special PPR high-efficiency extruder with German technology. The screw adopts a barrier and mixing head structure. The barrel adopts a new slotted barrel. The plasticization and mixing effect is good, and the extrusion volume is large and very stable.The PPR pipe extrusion machine is a spiral die head designed for PPR pipes. The die has the characteristics of low melt temperature, good mixing performance, low cavity pressure and stable production. The proprietary sizing and cooling system adopts water film lubrication and water ring cooling to meet the requirements of PPR materials and ensure the stability of the diameter and roundness of thick-walled PPR pipes produced at high speed.The PPR pipe making machine is specially designed with a multi-stage vacuum sizing box with vacuum control to ensure the dimensional stability and roundness of the PPR pipe. The extruder and tractor are driven and controlled by the frequency converter of Taiwan TECO, which has good stability, high precision and high reliability.
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All these for improving our product's quality, improving our company's efficiency and supplying better service to customers!

HDPE three layers co-extrusion pipe production line working in customer's factory
HDPE three layers co-extrusion pipe production line working in customer's factory
This PE pipe production line has been in operation in the customer’s factory for more than 2 years. the equipment has been running smoothly without major problems. At the same time, it has created objective benefits for customers and has been recognized by customers.During 6 years, until now this customer have bought our 6 pipe lines, we have build long and good business relastionship.
High Quality HDPE GEOCELL SHEET EXTRUSION MACHINE WORKING IN CUSTOMER'S FACTORY Wholesale - 青岛隆昌捷机械有限公司
High Quality HDPE GEOCELL SHEET EXTRUSION MACHINE WORKING IN CUSTOMER'S FACTORY Wholesale - 青岛隆昌捷机械有限公司
HDPE geocell sheet extrusion machine working in customer's factory more than 7 years, the machine make the sheet width 1.5m, also can according different moulds to make different patterns.The grid is widely used for reinforcing mad bed of expressway municipal road, railway and airport runway; reinforcement of reinforced earth on both side of road, railway and rover; strengthening the dyers of river and sea; enclosing wall of orchard, vegetable plot, domestic animal and land. The grid is made of high polymer first extruded by extruder and then drew longitudinally. The grid with high drawing strength is suitable for all kinds of soil. Its all functions and indexes surpass the earthwork net which not be drew, so it is the best ideal reinforced material. As the set is characterized by high output, good benefit, even quality and easy operation, so it is the best choice for earthwork material and plastic products manufacture to develop new products.-To stable the railway bed-To stable the highway bed-To fix the loading capacity of the dikes and the walls-Used in the river regulation-To support the pipeline and drains-To avoid the landslide and used in composite walls to support gravity loading-Used in independent wall, boatyard and river bank and so on-Used in the tidy-up of the desert, beach, river bed and the river bank
PVC board/sheet production line  working good in our customer's factory
PVC board/sheet production line working good in our customer's factory
PVC sheet production line working in our Poland customer factory,This equipment has been in operation in the customer’s factory for more than three year. Since these years, the equipment has been running smoothly without major problems. At the same time, it has created objective benefits for customers and has been recognized by customers.
500MM HDPE THREE LAYER CO-EXTRUSION LINE WORKING IN OUR TAIWAN CUSTOMER'S FACTORY
500MM HDPE THREE LAYER CO-EXTRUSION LINE WORKING IN OUR TAIWAN CUSTOMER'S FACTORY
THIS 500MM HDPE THREE LAYER CO-EXTRUSION LINE HAVE WORKED IN OUR CUSTOMER'S FACTORE MORE THAN 5 YEARS, IN HIS COMPANY ALSO HAVE OTHER PIPE EXTRUSION LINES SUPPLIED BY US, HIS COMPANY ALSO IS ONE OF THE BEST PIPE MANUFACTURERS IN TAIWAN.
ABOUT US

QINGDAO LONGCHANGJIE MACHINE CO.,LTD. is located in the world-famous port and coastal open city - Qingdao, traffic transportation has three advantages in sea, land and air. It was founded in 2001.

During more than 20 years, changjie staff always absorb the professional technology from domestic and overseas, cooperate with domestic scientific research institution, devote our minds to research, development, design and manufacture kinds of extruding machineries, let our technology come up to the domestic and international advanced level. 

Now our company has formed in Pipe production line/Plate production line/Profile production line three series of plastic extrusion line’s design, manufacture and development of comprehensive ability, meanwhile we can also provide customers the auxiliary equipment, various of molds and parts processing service! 

Now our production line have sold to many countries of the world, in the north is Russia,Ukraine,Kazakstan,Mongolia, in the west is India, Iran, Egypt, Sudan, Libya, SouthAfrica,and also American,Vietnam,Singapore, Korean,Indonesia,Taiwan and so on. All these, thanks to our overseas customers’ trust and support. 

In order to protect our brand, “changjie” brand has been registered  in the China Industrial and Commercial Administration; In order to carry out scientific administration ,we have passed CE and ISO international quality system certificate; In order to improve the overall quality of enterprise management, we have implemented 7S on-site management standards ... ... All these for improving our product's quality, improving our company's efficiency and supplying better service to customers! 

Sincere cooperation, customer first, forge ahead in unity to create a brilliant - this is our changjie staff's purpose of development! With the quality to win the market; With the management to create benefit; With innovation to pioneer development – this is our changjie staff's concept of development. 

Changjie’s pursuit is common development with friends at home and abroad, mutual benefit, and creats a win-win situation! Chang Jie's goal is even higher! Even faster! Even stronger! ! General manager-Geng Yongchang, leading all the company’s staff sincerely welcome you! ! !

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