Closed Mouth Rolling Mill
Closed mouth rolling mill is a type of rolling mill that is used to reduce the cross sectional area of the material being rolled. The closed mouth rolling mill is designed to reduce the formability of the material being passed through the rollers by providing a restricted compression of the material.
The closed mouth rolling mill is composed of two rolls that are mounted in a securely held frame. Each roll is mounted on its own frame, which allows for easy adjustment of the rollers. The front roll is also attached to a crank, which is used to adjust the pressure applied to the material. The second roll can be adjusted with an external control.
In operation, the material is placed between the two rolls of the closed mouth rolling mill. The latter are closed and the pressure is applied with the crank by rotating the rolls in the direction of the material. As the pressure is applied, the material is compressed and the two rolls move towards each other. The material is then displaced by the two rolls, forming a progressively decreasing cross section.
The amount of force applied dictates the amount of reduction required. For a higher amount of reduction or a lower amount of formability, the pressure must be increased. The material is then passed through the rollers again, which leads to an increased amount of reduction.
Closed mouth rolling mills are employed in manufacturing operations where the material needs to be reduced in size but still retains its formability. Examples of materials that can be effectively processed using a closed mouth rolling mill are wires, sheets and bars. The process is usually used to reduce the thickness of sheets and bars, but can also be used to reduce the cross-sectional area of wires and rods.
The closed mouth rolling mill is a useful tool for designers looking for materials that are both formable and able to retain their shape in the end application. The process is often used in conjunction with other metal forming processes such as extrusion and drawing. It can be used to create complex shapes and features, while still retaining the materials formability.
The closed mouth rolling mill requires the use of specific grades and types of materials to ensure that the material is not over compressed and that no deformation or breakage of the material occurs. The operator must also ensure that the amount of force that is applied is sufficient to reduce the material in size, but not so much that it affects the materials properties.
Closed mouth rolling mills can be used to reduce the size of pieces and components to form complex shapes. The process is often used in the production of metal and plastic parts, as it enables the reduction of components cross-sectional area in order to improve their formability. They are also useful in creating special components with prescribed shapes, such as round ends, knurled ends and threads.
