Briefly describe the development direction of the open mill

Briefly Describe the Development Direction of the Open Mill The open mill, also known as the open rubber mixer, is one of the fundamental machines in the rubber industry. Alongside internal mixers and extruders, it has been a key piece of equipment for over 180 years. The first human-powered single-roll mill was introduced in the early 1820s, followed by the twin-roll version in 1826. In 1955, China began designing and manufacturing large-scale open mills, and in the past 50 years, the technology has significantly advanced. Recently, new structural designs have emerged, promoting further development. Today, domestic open mills are available in various series, with local specifications and even exported internationally. While automated mixing lines have reduced the use of open mills due to the rise of extruders, internal mixers, and continuous mixers, they are still widely used in small and medium-sized plants, especially in the production of reclaimed rubber, small batches, and specialty rubbers. Foreign experts believe that the open mill cannot be fully replaced by other equipment, as it plays a crucial role in post-processing after initial mixing. In recent years, foreign open mills have seen limited structural changes, with most innovations focused on components rather than overall design. The development trend is moving towards higher levels of mechanization and automation, improved working conditions, increased efficiency, reduced space requirements, better attachments, and longer service life. Future directions include: 1. Enhanced control systems and automatic operation 2. Broader adjustment range 3. Improved bearing performance 4. Advanced safety devices, such as full-brake systems 5. Dual-shaft transmission systems 6. Better roller materials and casting techniques Small open mills, often used in laboratories and research settings, are ideal for formula development, testing, and small-scale production. Their compact design, ease of operation, and high safety make them popular in academic and industrial environments. Domestic models are still developing, but many institutions are now importing advanced versions from abroad. These mills are used in a wide range of applications, including silicone rubber, plastics, polymers, and engineering materials. Common sizes include 4-inch (120x300 mm), 6-inch (160x320 mm), and 9-inch (230x620 mm) models. Dongguan Zhenggong Electromechanical Equipment Technology (Taiwan-based) specializes in producing laboratory testing equipment, including open mills, vulcanizing machines, tensile testers, and more. With branches established in Guangdong and Jiangxi, the company focuses on innovation, quality, and customer satisfaction. It serves industries such as rubber, plastics, textiles, and aerospace, providing essential tools for research, quality control, and material testing. From small open mills to large-scale testing machines, the company offers a comprehensive range of products designed to meet diverse needs. They emphasize not only product quality but also customer support, offering free training and ongoing assistance to ensure optimal performance. Related Tags: Brief description of the development direction of the mill

Bearing Housing

Bearing housings are modular assemblies designed to make it easy to install bearings and shafts, while protecting bearings, extending their operating life and simplifying maintenance.

Housings are available in many sizes, and generally fall into five standard categories: split plummer (or pillow) block housings, non-split plummer block housings, flanged housings, take-up housings and two-bearing housings. These products can be designed to meet specific duty requirements such as load, speed and operating environmental conditions.

Non-standard bearing housing designs can also be supplied to particular customer requirements: for example, where special shaft centre heights, unusual sealing arrangements or non-standard materials of construction may be specified.

If ease of installation and maintenance are prime considerations, then split plummer block housings are an excellent choice as they not only accommodate pre-assembled shafts, but also simplify bearing inspections and maintenance as the shaft does not need to be disassembled. These units are designed for self-aligning ball bearings, spherical roller bearings and CARB toroidal roller bearings. Non-split plummer block housings are preferred when there are heavy loads acting in a direction other than toward the support surface. They are also used when the housing has to be mounted from the end of the shaft.

We have specialized in producing US/EURO standard bearing housings more than 10 years, could help to design the bearing housing or produce the bearing housing according to your requirements. (OEM accepted)

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