Dalian Rubber & Plastics Machinery Co., Ltd. has recently announced that its newly developed large-scale domestic plastic granulator will enter trial production at its new facility in May this year. However, despite this progress, high-end molding machines remain scarce in the domestic market, with imported equipment still dominating the sector.
The development of large-scale granulation technology is seen as a key trend in the industry. Although China has previously collaborated with foreign partners to build several 70,000-ton-per-year plastic granulators, none have succeeded. Today’s advanced granulation units require a capacity of over 50 tons per hour, translating to an annual output of 300,000 to 400,000 tons. This level of production demands highly sophisticated design and manufacturing capabilities, which are currently dominated by international players such as Japan's Kobe Steel, Japan Steel Works, and Farrell.
Compared to foreign counterparts, China's plastic granulator technology still lags behind. While the country has made progress in absorbing and applying large-scale granulator technology, it has yet to fully implement these advancements. China has completed the design for polypropylene mixing extruder units capable of producing 70,000 to 100,000 tons annually, but these systems are not yet in practical use. The overall performance of China’s extrusion granulators remains significantly behind global standards, particularly for large and medium-sized polyolefin systems, which are still largely imported.
In recent years, China's plastics machinery industry has experienced rapid growth. This is evident in both import and export data, reflecting not only increased production capacity but also notable improvements in quality and technological sophistication. China is now a major manufacturer and consumer of plastic machinery, though it is not yet a true leader in the field.
There are approximately 400 plastic machinery manufacturers across China, mostly concentrated in economically developed regions like the Pearl River and Yangtze River Deltas. In contrast, areas such as Tibet, Xinjiang, Qinghai, Ningxia, and Hainan still lack any local production facilities. Despite the growing market, imports still account for around 50% of the total market share, indicating that many advanced technologies remain out of reach for domestic producers.
Overcoming these technological bottlenecks will take time. Key equipment such as large-scale granulation units, precision injection molding machines, and biaxially stretched film production systems are still heavily reliant on imports. This is partly due to the relatively weak foundation of China’s press manufacturing industry.
While there is a clear gap between China’s plastic machinery and that of advanced countries—especially in areas like precision injection molding and large-scale granulation—domestic products are often comparable in quality and performance. Many can meet or even exceed the requirements of foreign equipment, yet they are still imported due to brand perception and market preferences.
To address these challenges, the industry must continue to enhance innovation and improve management practices. At the same time, Chinese companies are actively working to align with international standards and compete globally. According to recent data, China's plastics machinery industry ranks among the top 190 sectors in the broader machinery industry. The country's annual production capacity exceeds 200,000 sets, making it the world's largest producer.
In Ningbo alone, more than 100 injection molding machine manufacturers operate, with brands like Haitian gaining international recognition. Haitian's injection molding machines are exported to over 30 countries, including Europe and the U.S., and generate annual sales of over $200 million. With the plastics industry still in a phase of high growth, it is estimated that China’s plastic machinery output will reach 500,000 units by 2010.
Currently, general-purpose plastic machinery faces overcapacity, and companies undergoing technological upgrades are investing in more efficient and precise equipment to boost innovation. The path to becoming a true leader in the industry is long, but with continued effort, China is steadily moving forward. As the saying goes: "No diamond drill, no way to live in porcelain." For the plastics machinery industry to truly break through, there is still much work to be done.
Ultra Low Temperature Infrared Pyrometer
This classification includes one color infrared pyrometers measuring range is 0℃-1000℃. The one color pyrometers currently on market are mostly narrow-band pyrometers. Its principle of temperature measurement is to determine the temperature by detecting the radiant energy that occurs in a narrow wavelength range (8-14μm for 0-1000C pyrometer) of an object. The temperature a pyrometer measured is the average temperature in an area, and the measuring result is affected by emissivity, lens contamination and background radiation.
To use 1-color pyrometer mode, the measured area of the object should be large (it can fully fill the target field of view) , object surface should be relatively flat (not curved), measurement direction should less than 30 degrees, and the physical and chemical state of the measured object surface should be stable (not in the process of oxidation, gasification or liquefaction) , the optical channel should with less dust and without blocking and attenuation.
Main applications include: inductioin heating,heat treatment,Galvanized wire ,also suitable for temperature measurement in a good environment. Products in this catalog are usually applied to metallurgical industry(rod and wire mills.Hot rolling mills), foundry, cement kiln, induction heating, heat treatment, heating furnace, vacuum furnace, monocrystalline silicon, polysilicon, semiconductor and other industrial temperature measurement.1000C infrared pyrometer, compact infrared pyrometer, small online infrared pyrometer
Changzhou Sijie Optoelectronics Technology Co.,Ltd. , https://www.sjinfrared.com