Statics and Dynamics of Carrier Particles in Two-Component Magnetic Development System in Electrophotography
Statics and Dynamics of Carrier Particles in Two-Component Magnetic Development System in Electrophotography
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DOI：
10.2352/j.imagingsci.technol.2009.53.6.060201
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发表时间：
2009-11
影响因子：
1
通讯作者：
H. Kawamoto;T. Hiratsuka
中科院分区：
文献类型：
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作者：
H. Kawamoto;T. Hiratsuka
作者用一个简单的模型和一个样机研究了电子照相双部件显影系统中磁刷的静力学和动力学。在模型实验中，作者测量了磁性载体颗粒链与感光器接触时形成的刷子的法向力和切向力，以阐明切向摩擦力与载体颗粒直径、磁通密度和刷子长度的关系。切向摩擦力随磁通密度的增大而增大，随电刷长度的增加而减小，但总力不受载体颗粒直径的影响。另一方面，利用改进的离散单元法进行的数值计算表明，虽然总力不受载体颗粒直径的影响，但作用在链上的磁性颗粒上的单个差分力很小，并且当颗粒尺寸较小时，与感光鼓接触的载体颗粒的密度较高。在使用原型机进行的调查中，发现在显影区形成的磁刷沿平行于磁场的方向倾斜，链被感光鼓压碎。虽然施加在感光体上的总压力几乎与载体颗粒的直径无关，但当颗粒尺寸较小时，单个链所施加的差分力较小，且分布致密；而当颗粒尺寸较大时，如模型研究所预测的那样，微分力较大，分布较粗糙。这一结果表明，小的载体颗粒有利于防止在感光器上显影的图像中的任何干扰。此外，还对所提供的载流子粒子的显影间隙和镀膜厚度的影响进行了评估。
The authors used a simple model and a prototype machine to study statics and dynamics of a magnetic brush in a two-component development system in electrophotography. In the model experiment, the authors measured the normal and tangential forces of the brush formed from a chain of magnetic carrier particles when it comes in contact with the photoreceptor to clarify the relationship between the tangential friction force and the diameter of the carrier particles, magnetic flux density, and the length of the brush. The tangential friction force increased with the magnetic flux density and decreased with an increase in the length of the brush; however, the total force was unaffected by the diameter of the carrier particles. On the other hand, numerical calculations performed using an improved distinct element method revealed that although the total force was not affected by the diameter of the carrier particles, the individual differential force acting on the magnetic particles of the chain was small, and the density of the carrier particles that come in contact with the photoreceptor drum was high when the size of the particles was small. In the investigation carried out using the prototype machine, it was found that the magnetic brush formed in the development area is inclined in a direction parallel to the magnetic field and that the chains are crushed by the photoreceptor drum. Although the total pressure applied on the photoreceptor was almost independent of the diameter of the carrier particles, the differential force exerted by individual chains is small and distributes dense when the size of the particles is small; on the other hand, it is large and distributes rough when the size of the particles is large as predicted by the model investigation. This result suggests that small carrier particles are advantageous in preventing any disturbances in the images developed on the photoreceptor. The effects of the development gap and the thickness of the laver of supplied carrier particles have also been evaluated.