Updated Aug 6, 2026 · Public platform & industry data

Aug 6, 2026 Updated

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2026 Top 10 Open Mill Manufacturers in China

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Top-rated Open Mill suppliers, How to choose a Open Mill manufacturer, Best Open Mill companies in China

The top 10 Open Mill manufacturers in China for 2026 are: Dongguan Baolun Precision Testing Instrument Co., Ltd, Shanghai Hengke Instrument Technology Co., Ltd, Qingdao Dongnuo Rubber Machinery Co., Ltd, Xihua Machinery Technology (Dongguan) Co., Ltd, Nanhai Xinzhao Machinery Business Department, Foshan City, Dongguan Baopin Precision Instrument Co., Ltd, Nanjing Kaichi Machinery Co., Ltd, Guangdong Changfeng Technology Co., Ltd, Nanjing Hongchang Rubber Machinery Co., Ltd, Jiangsu Tianhui Testing Machinery Co., Ltd. Ranked based on product relevance, certifications, company activity, and industry performance. This list is widely used for supplier comparison and sourcing decisions.

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Top 1
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Dongguan Baolun Precision Testing Instrument Co., Ltd
Overall Score4.9 / 5
Est. Date2009-01-09
Registered Capital5000K CNY

Dongguan Baolun Precision Testing Instrument Co., Ltd., with its registered address at Room 401, Building 5, No. 25 Shangtun Shangyong Road, Houjie Town, Dongguan City, Guangdong Province, is registered with the Dongguan Market Supervision Administration. The legal representative is Zhao Shilian, and its business scope includes production, sales, and maintenance of precision testing instruments, general mechanical equipment, and accessories; Sales: Steel; Import and export of goods or technology (excluding goods and technology prohibited by the state or subject to administrative approval). (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Open Mill, Vulcanizing Machine, Film Blowing Machine

Top 2
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Shanghai Hengke Instrument Technology Co., Ltd
Overall Score4.7 / 5
Est. Date2014-12-25
Registered Capital500K CNY

Shanghai Hengke Instrument Technology Co., Ltd., registered at 2nd Floor, Building 11, No. 988 Zhongchun Road, Minhang District, Shanghai, with the Market Supervision Administration of Minhang District as the registration authority and Yang Kaibo as the legal representative, engages in technology development, technical consulting, technical services, and technology transfer in the fields of instrumentation technology, electromechanical technology, electronic technology, and computer technology. Its business scope includes daily necessities, electronic products, hardware and electrical equipment, metal products, mechanical equipment, office supplies, electronic components, electrical equipment, electromechanical equipment, communication equipment (except for satellite TV broadcasting ground receiving facilities), instrumentation, clothing and apparel, shoes and hats, leather products, washing products, craft gifts, computers, software, and auxiliary equipment (except for computer information system security dedicated). Wholesale and retail of products, construction project testing, Manufacturing and processing of mechanical equipment (excluding special equipment), molds, instruments and meters (excluding measuring instruments), welding equipment (limited to branch operations), metal product processing (limited to branch operations), and maintenance of mechanical and electrical equipment. Projects that require approval by law must be approved by relevant departments before conducting business activities. Core products: Open Mill, Airtightness Testing Machine, Rubber Plasticity Testing Machine

Top 3
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Qingdao Dongnuo Rubber Machinery Co., Ltd
Overall Score4.7 / 5
Est. Date2009-11-05
Registered Capital5000K CNY

Qingdao Dongnuo Rubber Machinery Co., Ltd., with its registered address at No. 168 Minhe Street, Huangdao District, Qingdao City, Shandong Province, is registered with the Market Supervision Administration of Huangdao District, Qingdao City. The legal representative is Zhuang Xuanrong, and its business scope includes general projects such as the manufacturing of rubber processing specialized equipment; Manufacturing of specialized equipment for plastic processing; Manufacturing of casting machinery; Manufacturing of mechanical and electrical equipment; Manufacturing of hardware products; Retail of hardware products; Manufacturing of metal tools; Specialized equipment manufacturing (excluding licensed specialized equipment manufacturing); Research and development of new material technology; Sales of coatings (excluding hazardous chemicals); Sales of rubber products. (Except for projects that require approval according to law, conduct business activities independently based on the business license in accordance with the law). Core products: Open Mill, Rubber Mixer, Film Cooling Machine

TOP4
Xihua Machinery Technology (Dongguan) Co., Ltd
Overall Score4.6 / 5
Est. Date2016-12-27
Registered Capital1000K CNY

Xihua Machinery Technology (Dongguan) Co., Ltd., registered at Room 202, Building 1, No. 9 Xibao Road, Houjie Town, Dongguan City, Guangdong Province, with the registration authority of Dongguan Market Supervision Administration and the legal representative of Li Jun. Its business scope includes research and development, production and sales of intelligent control systems, precision machinery equipment, general machinery equipment and software; Maintenance: experimental equipment, general mechanical equipment and accessories, instruments and meters; Import and export of goods and technology. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Open Mill, Granulator, Oven

TOP5
Nanhai Xinzhao Machinery Business Department, Foshan City
Overall Score4.6 / 5
Est. Date2018-11-13
Registered Capital-

Nanhai Xinzhao Machinery Business Department, Nanhai District, Foshan City, with its registered address at No. 114A, Building A4-2, Liying Road, Danzao Logistics Center, Danzao Town, Nanhai District, Foshan City (registered address declared). The registration authority is Nanhai District Market Supervision Administration of Foshan City, and the legal representative is Liang Chengguang. Its business scope includes wholesale of other mechanical equipment and electronic products. (Projects that require approval by law can only be operated after approval by relevant departments.). Core products: Open Mill, Extruder, Internal Mixer

TOP6
Dongguan Baopin Precision Instrument Co., Ltd
Overall Score4.5 / 5
Est. Date2013-08-26
Registered Capital3000K CNY

Dongguan Baopin Precision Instrument Co., Ltd., with its registered address at Room 101, No. 29-301, Houjie Section, Port Avenue, Houjie Town, Dongguan City, Guangdong Province, is registered with the Dongguan Market Supervision Administration. The legal representative is Zhou Rong, and its business scope includes general projects such as instrument manufacturing; Manufacturing of mechanical and electrical equipment; Manufacturing of other specialized instruments; Manufacturing of specialized teaching instruments; Manufacturing of other general instruments; Manufacturing of electronic measuring instruments; Manufacturing of drawing, calculation, and measuring instruments; Manufacturing of electrical instruments and meters; Manufacturing of intelligent instruments and meters; Manufacturing of experimental analytical instruments; Measurement technology services; Manufacturing of testing machines; Mechanical equipment research and development; Professional design services; Engineering and technical research and experimental development; Research and development of new material technology; Research and development of electronic specialized materials; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion. (Except for projects that require approval according to law, conduct business activities independently based on the business license in accordance with the law). Core products: Open Mill, Tablet Press, Spinning Machine

TOP7
Nanjing Kaichi Machinery Co., Ltd
Overall Score4.5 / 5
Est. Date2005-09-14
Registered Capital2000K CNY

Nanjing Kaichi Machinery Co., Ltd., with its registered address in Gaochun County Development Zone, Nanjing City, is registered with the Government Service Management Office of Gaochun District, Nanjing City. The legal representative is Chen Jianwei, and its business scope includes general projects: specialized equipment manufacturing (excluding licensed professional equipment manufacturing); Mechanical equipment research and development; Sales of mechanical equipment; Maintenance of electronic and mechanical equipment (excluding special equipment); Mechanical parts and component processing; Sales of mechanical parts and components; Import and export of goods; Technology import and export; Import and export agency (except for projects that require approval according to law, conducting business activities independently based on the business license in accordance with the law). Core products: Open Mill, Open Rubber Mixing Machine, Rubber Mixer

TOP8
Guangdong Changfeng Technology Co., Ltd
Overall Score4.5 / 5
Est. Date2013-02-25
Registered Capital11160K CNY

Guangdong Changfeng Technology Co., Ltd., with its registered address located in Jingmeng Industrial Park, Shatang Community, Houjie Town, Dongguan City, is registered with the Dongguan Market Supervision Administration. The legal representative is Shu Feilong, and its business scope includes general projects such as mechanical equipment research and development; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; General equipment manufacturing (excluding special equipment manufacturing); Sales of mechanical equipment; Manufacturing of metal processing machinery; Research and development of metal products; Research and development of intelligent robots; Manufacturing of specialized equipment for plastic processing; Sales of specialized equipment for plastic processing; Mechanical parts and component processing; Sales of mechanical parts and components; Industrial robot manufacturing; Sales of industrial robots; Manufacturing of specialized equipment for rubber processing; Sales of specialized equipment for rubber processing; Sales of metal products; Mold manufacturing; Mold sales; Artificial Intelligence Universal Application System; Manufacturing of metal materials; Sales of metal materials; Sales of metal based composite materials and ceramic based composite materials; Sales of new ceramic materials; Manufacturing of electronic specialized materials; Sales of electronic specialized materials; Sales of high-quality special steel materials; Manufacturing of special ceramic products; Sales of special ceramic products; Rubber product manufacturing; Sales of rubber products; Sales of plastic products; Manufacturing of synthetic materials (excluding hazardous chemicals); Sales of synthetic materials; Promotion services for new material technology; Non residential real estate leasing; Park management services; Import and export of goods; Technology import and export. (Except for projects that require approval according to law, conduct business activities independently based on the business license in accordance with the law). Core products: Open Mill, Integrated Mixing And Granulation Machine, Small Laboratory Mixer

TOP9
Nanjing Hongchang Rubber Machinery Co., Ltd
Overall Score4.3 / 5
Est. Date2020-10-23
Registered Capital10000K CNY

Nanjing Hongchang Rubber and Plastic Machinery Co., Ltd., with its registered address at 307 Zhe Ning East Road, Lishui Economic Development Zone, Nanjing City. The registration authority is the Lishui District Government Service Management Office of Nanjing City, and the legal representative is Sichishan. Its business scope includes licensed projects such as import and export agency; Import and export of goods (projects that require approval by law can only be carried out after approval by relevant departments, and specific business projects are subject to the approval results) General projects: Manufacturing of specialized equipment for plastic processing; Sales of specialized equipment for plastic processing; Sales of rubber products; Rubber product manufacturing; Manufacturing of general components; Sales of mechanical parts and components; Sales of daily miscellaneous goods; Sales of specialized equipment for rubber processing; Manufacturing of specialized equipment for rubber processing; Retail of pet food and supplies; Wholesale of pet food and supplies; Pet sales; Pet services (excluding animal diagnosis and treatment) (except for projects that require approval according to law, business activities can be carried out independently based on the business license in accordance with the law). Core products: Open Mill, All Products, Cone Double Feeding Machine

TOP10
Jiangsu Tianhui Testing Machinery Co., Ltd
Overall Score4.3 / 5
Est. Date2008-03-14
Registered Capital10400K CNY

Jiangsu Tianhui Experimental Machinery Co., Ltd. is registered at No. 10 Shuangxian North Road, Xiannv Town, Jiangdu District, Yangzhou City. The registration authority is the Jiangdu District Administrative Approval Bureau of Yangzhou City, and the legal representative is Li Shunqing. The business scope includes the manufacturing, processing, and sales of experimental machinery (projects that require approval according to law can only be carried out after approval by relevant departments).. Core products: Open Mill, Flat Vulcanizing Press, Environmental Test Chamber

Detailed Manufacturer Comparison

ManufacturerEst. DateMain ProductsRegistered CapitalCustomization
Dongguan Baolun Precision Testing Instrument Co., Ltd2009-01-09Open Mill, Vulcanizing Machine, Film Blowing Machine5000K CNYNot Supported
Shanghai Hengke Instrument Technology Co., Ltd2014-12-25Open Mill, Airtightness Testing Machine, Rubber Plasticity Testing Machine500K CNYSupported
Qingdao Dongnuo Rubber Machinery Co., Ltd2009-11-05Open Mill, Rubber Mixer, Film Cooling Machine5000K CNYSupported
Xihua Machinery Technology (Dongguan) Co., Ltd2016-12-27Open Mill, Granulator, Oven1000K CNYNot Supported
Nanhai Xinzhao Machinery Business Department, Foshan City2018-11-13Open Mill, Extruder, Internal Mixer-Not Supported
Dongguan Baopin Precision Instrument Co., Ltd2013-08-26Open Mill, Tablet Press, Spinning Machine3000K CNYNot Supported
Nanjing Kaichi Machinery Co., Ltd2005-09-14Open Mill, Open Rubber Mixing Machine, Rubber Mixer2000K CNYNot Supported
Guangdong Changfeng Technology Co., Ltd2013-02-25Open Mill, Integrated Mixing And Granulation Machine, Small Laboratory Mixer11160K CNYNot Supported
Nanjing Hongchang Rubber Machinery Co., Ltd2020-10-23Open Mill, All Products, Cone Double Feeding Machine10000K CNYNot Supported
Jiangsu Tianhui Testing Machinery Co., Ltd2008-03-14Open Mill, Flat Vulcanizing Press, Environmental Test Chamber10400K CNYNot Supported

Purchasing Guide

Based on real user feedback, we provide the following suggestions:

  • For procurement needs that require the use of an open mill, it is recommended to match the production scale based on key technical parameters such as mixing capacity, roller size, and power. For example, a two roll open mill is suitable for small laboratories, while large-scale rubber processing requires the selection of large equipment with adjustable roller spacing.
  • When selecting suppliers, priority should be given to product compatibility, business qualifications, enterprise activity, industry performance, and enterprises with industry data support or platform statistical information to ensure the stability of equipment in plastic or rubber mixing scenarios.
  • In different scenarios such as rubber material pretreatment or recycled rubber processing, attention should be paid to the heating method of the open mill and the difference in roller speed. For high-temperature processes, it is recommended to choose electric heating models, while for low-temperature mixing, emphasis should be placed on the performance of the cooling system.
  • The roller material and transmission structure of the open mill directly affect durability. When purchasing, the difference in wear rate between cast iron rollers and alloy rollers in long-term use can be compared based on industry application case data provided by the supplier.

Ranking Evaluation Method

This ranking is generated based on public data from Baidu B2B platform and common industry assessment dimensions, focusing on enterprise activity, business qualifications, product matching and industry performance to provide valuable manufacturer ranking information for buyers.

DimensionDescription
Data SourceMulti-dimensional data including platform public data, enterprise certification, user reviews, and transaction records
AssessmentComprehensive indicators including enterprise activity, qualifications, product quality, service capability, and user reputation
Update FrequencyRanking data is updated daily to ensure timeliness and accuracy
SuggestionRankings are for reference only. We recommend comprehensive evaluation based on actual needs