详情描述
Roller SkinA crucial component of the ball press machine, it provides the necessary molding pressure during the machine's operation. The design of the roller skin and the choice of material have a critical impact on the performance and finished product quality of the ball press machine.
Here are some detailed specifications about the roller skin:
UsageRoller shells are mainly used in ball presses, applying pressure through their surface to shape the material. In dry extrusion granulators, roller shells are made of high-strength, wear-resistant, alloy stainless steel and are subjected to multiple hard-facing treatments.
Ensure the ball socket is smooth for easy demolding, thereby extending the extrusion's service life.
Material and TreatmentRollers are typically made of high-strength, wear-resistant stainless steel alloy. This material, combined with multiple hard-facing technologies, offers excellent wear resistance and durability. The smoothness of the ball sockets is crucial for ensuring the quality of the finished product.
Crucial, as it affects ease of demolding and prevents the finished balls from having burrs or being substandard.
Adjustment and MaintenanceThe use and maintenance of roller skins also require attention. For instance, if the quenching hardness of the roller skin is not high enough, it may reduce the molding pressure of the ball press. In such cases, the surface quenching heat treatment of the roller skin can be performed.
Replace the roller shells to resolve the issue. Additionally, the ball sockets on the two roller shells of the ball press must maintain central alignment to prevent misalignment or quality issues in the finished balls.
The roller sleeves of the pellet mill from Zhengzhou Hongxin Mining Equipment Co., Ltd. are made of 9Cr2Mo material, and there are also many GCr15 materials on the market. Below are the differences between the two materials:
GCr15 is a commonly used bearing steel; it contains 1.2%wt of carbon and 1.5%wt of Cr; 9Cr2Mo is a cold working die steel; it contains 0.9%wt of carbon and 2.0%wt of Cr.
Molybdenum (Mo) content is around 1%; of course, bearing steel can also be used as cold working die steel, suitable for making files, taps, gauges, and more. 9Cr2Mo steel is commonly used to manufacture items like spiral taps, taps, thread rolling plates, and punch dies, among others.
The alloy element content of 9Cr2Mo steel is twice that of GCr15 bearing steel, with superior performance; both Cr and Mp elements, when solidly dissolved in the matrix, increase the electrode potential of the matrix, thereby enhancing the material's
Electrochemical corrosion resistance; that is, it enhances the steel's resistance to acidic and alkaline corrosion. The quenching hardness of GCr15 bearing steel is slightly higher than that of 9Cr2Mo steel, but its hardenability is significantly lower than the latter; its toughness is also lower than the latter. Overall,
GCr15 bearing steel is far inferior to 9Cr2Mo steel.
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