Current Location:Home > About Us >

About Chuangyu ——

Zhoushan Dinghai Chuangyu Plastic Machinery Factory

Zhoushan City Dinghai Chuangyu plastic machinery factory is located in the East China Sea, Zhoushan, Zhejiang, China screw core area. The company is a research and development, production, sales, service in one of the manufacturers, specializing in the production of injection molding machine, extruder, blow film machine, blow molding machine, shoemaking machine, rubber machine, chemical fiber machine, granulator, foam machine and other core parts of the plastic machine: barrel, screw, Colin column, pull rod and so on. The company has strong technical force, equipped with various precision production equipment, and experimental equipment. Strictly control the quality of each production process, implement lean and healthy management to ensure the efficiency and excellence of products. To provide customers with reliable and efficient: Nitriding machine barrel, double alloy machine barrel, cone double machine barrel screw, flat double machine barrel screw, nitriding screw, electroplating screw, PTA crown spray welding screw, double alloy full melt injection screw, optical screw, halogen-free screw, full hard screw, coating screw. At present, all kinds of products are well received by domestic and foreign equipment manufacturers and users, making the products better based on the industry market.
Over the years, with continuous innovation and high-quality service, the company has not only won a solid domestic market, but also exported its products to more than 30 countries and regions, including Europe, America, Australia, the Middle East, Asia, etc.
Company tenet: create value with quality, make products deeply rooted in people. Looking forward to the future, the company will continue to carry forward the spirit of hard work, entrepreneurship and innovation, and adhere to intelligent creation of first-class products. With customers to update higher challenges, common leap, create brilliant.

Technology process ——

Nitriding screw processing flow


  • Blanking
  • Heat treatment (tempering)
  • Rough machining
  • Heat treatment (Qualitative)
  • finish machining
  • Roughing
  • Heat treatment (nitriding)
  • finish machining
  • testing
  • check before acceptance

Processing flow of alloy screw


  • Blanking
  • Heat treatment (tempering)
  • Rough machining
  • Heat treatment (Qualitative)
  • finish machining
  • Spraying alloy for screw and screw edge
  • Roughing
  • Heat treatment (nitriding)
  • finish machining
  • testing
  • check before acceptance

Process flow of nitriding barrel


  • Blanking
  • Barrel inner hole rough machining
  • Heat treatment (tempering)
  • finish machining
  • Roughing
  • Heat treatment (nitriding)
  • finish machining
  • testing
  • check before acceptance

Processing flow of alloy technician


  • Blanking
  • Barrel inner hole rough machining
  • Inner hole alloy casting of barrel
  • finish machining
  • finish machining
  • testing
  • check before acceptance

Heat treatment


Conditioning treatment


Quenching and tempering is to heat, quench, temper and heat preservation materials to make them have strong toughness and hardness. The utility model can increase the service life of the barrel screw and reduce the deformation.

Tempering hardness: HB ≥ 260

Setting treatment


Setting is to heat up the screw which has been rough machining to make its temperature larger than that of nitriding treatment, so that the screw which has been nitriding treatment will not deform or bend in the nitriding process.

Nitriding treatment


The hardness of the machine barrel screw after nitriding treatment can reach over hv900. The products after nitriding treatment have excellent wear resistance, fatigue resistance, corrosion resistance and high temperature resistance.

Nitriding hardness: HV ≥ 900
Nitriding depth: 0.5-0.6mm