Products of the film in the special requirements of the roller

The calendering and extrusion processes, typically occurs under a lot of roller compaction force, the relative products, a certain separation force, if supported on the roller

bearings on both ends of the cylindrical Incline Belt conveyor beam, and therefore can not use normal beam theoretical formula to calculate the bending deformation, but with the deflection value (

Including bending deflection and shear deflection) seeking the formula for maximum deformation. That in the actual production, the total deflection of the central roller is much

larger than the allowed tolerances products, must try to compensate, or fail to achieve the required precision products. Since the roll deflection in the central part,

Both ends of the small, so products appear thicker in the middle, both ends of the thin, hence crowning There are Weight Sorter typically three ways, namely height method, the pre-load method

and pre-load device.
To eliminate the thickness of both sides of the thin intermediate products case consciously work roll surface processing into the central diameter, a small diameter drum-shaped

ends, wherein the maximum diameter and the end portion of the minimum diameter difference is called the height E. Of course, the ideal shape of the curve should be highly

rollers

Deflection curve. However, due to machining difficult to do, is often used as part of an arc or ellipse approximation to compensate.
In fact, highly accurate curve is not necessary, because the impact of the size of the cross-pressures many factors, these factors change, horizontal pressure changes, the

deflection will change accordingly, so the fixed height compensation law in the limitations large, generally not used alone. By the

At the height compensation method is simple, more general use. When the roller when no other compensation method with which the height of 0.02 ~ 0.10mm range, used in

conjunction with other compensation method when the height of 0.02 ~ 0.06mm range. The general manufacturers in the production of high, pass

Over the grinder grinding pull at an angle in high demand from both ends toward the middle ground, this operation tends to form a horn, both sides are straight, no high curve.

And some companies are currently using large CNC roll grinding, then the use of the computer for automatic control console

Curvilinear motion, so grind the roll surface is a curved shape, is basically consistent with the deflection curve, plastic products to meet the requirements.
Strict implementation of the roller production process to ensure the quality of the roller
Currently, the country has a lot of roller manufacturers, but can really provide high-quality roller few manufacturers. The reason is to do a high-quality roll manufacturing

process must be strictly enforced, the lack of any one intermediate step, the surface can make a roll, but in reality

It reveals the process of using the occasion of serious quality problems that affect the normal use of factory production.
Therefore, to make a high-quality roll roll blank first strict selection of materials, plastics should be different in the selection process seamless or centrifugal casting or

forging parts, in the production process, to be used for different roll blank corresponding The quenching and tempering heat treatment processes; its

Times, in the processing process, after the welding process must also eliminate stress, to improve the surface hardness of the surface hardening or nitriding processes, must not

be deprived because of the high costs of these processes, which appear on the surface can not see out, but in the actual use of the production process

There is a serious risk, which is absolutely not allowed to roll production. Further, in electroplating and surface treatment process should strictly ensure moderate coating

thickness, especially during grinding process in the ultra-fine grinding process steps should be carried out strictly in accordance with, should never be neglected figure

Province chart fast normal

Steps to reduce the process, otherwise no legal qualified to the roller.