KR200332701Y1 - regenerated magnetic developer roller of toner catridge - Google Patents

Abstract

The present invention has a scratch-type microsurface irregularities of 5 to 40 μm that are formed concentrically with respect to the rotation axis of the wear surface of the magnetic developer roller, which is a main component of the toner cartridge, to improve the narrowing of the toner powder. It provides a regenerated aluminum alloy magnetic phenomenon roller. Fine scratches formed on the surface improve toner powder adhesion.

Description

Regenerated magnetic developer roller of toner catridge}

The present invention relates to a regenerated toner cartridge magnetic phenomenon roller.

The toner cartridge used in the laser beam printer is basically designed as a consumable, and is disposed of after the toner is used up and installed and used as a new toner cartridge.

The toner cartridges supplied by the printer makers are expensive and have a considerable maintenance cost comparable to printer purchase costs. In addition, the disposal of the used toner cartridge causes not only waste of resources but also environmental pollution. Therefore, recycling of toner cartridges is carried out variously due to economic and environmental demands. This recycling is mainly accomplished by reinjecting and sealing the toner.

Magnetic developer roller (also known as "mag-roller") is a component of the toner cartridge, which is made of aluminum alloy and has a magnetic rod inside, so that the toner powder is caught by magnetic force and the electrostatic drum (OPC drum) is electrostatically discharged. Toner powder is transported by a train.

Self-developing rollers wear out due to contact with the doctor blade during rotation in the printing process, and when used for a long time, the surface becomes totally or partially mirrored (mirror surface), and the toner powder is not constricted while maintaining the density evenly. Drop.

Korean Patent Publication No. 2000-49477 proposes Teflon coating after polishing developer roller to regenerate the developer roller. However, polishing the developer roller requires mechanical machining separately, which is expensive and it is difficult to precisely control the thickness by dipping or spraying the Teflon solution. Uneven partial coating thickness adversely affects print quality.

In order to improve the performance of the used self-developing rollers, brushing with various sandpapers is performed in the field, but sufficient standard working standards are not established, which may result in non-uniformity of quality. There may be a problem with the separation of.

As a finishing of metal processing, power brushing is one of the widely used means. Power brushing is generally used to remove scratches or edges from metal processing and to clean the appearance of metal products. However, power brushing improves the physical properties of the metal surface and contributes to strengthening the adhesive strength of the paint and increasing wear resistance.

The inventors found that the surface irregularities in and around 20 μm significantly improved the toner powder narrowing property, and applied the above power brushing inversely to obtain a relatively uniform fine scratch on the surface of the magnetic developing roller in the mirror (mirror) state. Attention was paid to the formation of the toner powder to enhance the narrowing of the toner powder. In addition, such power brushing can be repeatedly economically feasible without involving excessive loss of dimensions.

An object of the present invention is to improve the toner powder narrowing and uniformity by providing a self-developing roller having a fine surface concavo-convex structure that is easy to produce mechanically. It is also an object of the present invention to provide a regenerative magnetic phenomenon roller economically.

The present inventors have found and completed a magnetic developing roller having a microsurface uneven structure of about 20 μm and improving toner powder narrowing property.

1 is a schematic diagram of a phase forming process

2A is a surface micrograph of Example 1

2b is a surface micrograph of Comparative Example 1

2C is a surface micrograph of Comparative Example 2

According to the present invention, there is provided a regenerated aluminum alloy self-developing roller having a scratch-type microsurface uneven structure having a width of 5 to 40 µm formed on the outer circumferential surface almost concentrically with respect to the rotation axis. Since the surface irregularities are not by turning of the lathe, they may interfere with each other, may be partially overlapped, and may be broken in the middle. The size of a preferable uneven structure is 10-30 micrometers.

Such surface irregularities are obtained by performing power brushing under constant conditions with a micro-diameter wire brush having a hardness similar to that of the workpiece. Self-developing rolls are aluminum alloy steels and have a surface hardness of approximately Brinell 400 to 500. The strength of the steel wire used in the brush is required to have a high hardness steel wire so as to give enough scratches at a relatively low pressure (10 kg / cm 2) to the magnetic developing roller. Cold drawn steel wire of carbon steel or stainless steel meets these conditions. In general, the hardness of such steel wire is Brinell 330 to 530 and preferably Brinell 400 to 500.

The diameter of the wire is an important factor in the size and uniformity of the scratches formed on the surface of the magnetic developing roller. Preferable surface irregularities for toner powder stenosis are approximately 10 µm to 30 µm. In order to obtain such a scratch, it is possible if it is a steel wire which has a diameter of 0.02 mm (20 micrometers)-0.06 mm (60 micrometers). This is because even with a steel wire of 0.06 mm, scratch formation of 30 μm is possible due to the edge effect.

The aggregate density of the wire in the brush is necessary to achieve a relatively uniform scratch at low rotations, and the length of the trim is related to the internal pressure of the brush. The trim of the brush is the length at which the steel wire is fixed to the center of rotation, and is generally divided into short trim (less than 10 mm), intermediate trim (10 mm to 50 mm) and long trim (50 mm to). Since it is important that the scratches are formed uniformly throughout, an intermediate trim is appropriate to cushion the partial pressure differential. Preferably the size of the trim is 20 mm to 40 mm.

The speed of brush rotation is relatively low. It is performed at 200 to 800 rpm to prevent deterioration of the steel wire due to the partial burning phenomenon. The selection of this rotational speed is to control the uniformity and size of the surface scratches while preventing the deterioration of the steel wire. Below 200 rpm, scratches are uneven with one brush. You will need to repeat the brushing several times to make it uniform.

The pressure applied to the workpiece should be controlled to prevent deterioration of the steel wire and to form a scratch of a certain size. In the case of using a steel wire of relatively high hardness, even if the power brushing pressure is low, good scratches are achieved, but when the hardness of the steel wire is low, the brushing pressure should be high. Pressures above 10 kg / cm 2 are not recommended. The wires deteriorate easily and thus the repeatability of quality is poor.

Although the above power brushing can be carried out in a dry state, it is recommended to supply an aqueous solution of caustic soda of less than 10% to the brushing surface to prevent local heating while removing the contaminants formed partially during use or storage of the magnetic developing roller. desirable.

Example 1

Stencil steel wire with 0.03mm diameter and Brinell hardness 430 trim 30mm, medium density (surface porosity 15%), using a rotating magnet brush rotating at 150rpm, brushing at 500rpm with 2kg / cm2 pressure While scratching at a feed rate of 5mm per second. The 50th regenerated magnetic roller was painted with a matte black oil paint and dried, and then diluted white paint was penetrated into the scratch grooves and dried to be uniformly distributed on the surface of the uneven structure of 15 to 30 μm. One). By assembling in the toner cartridge and rotating the magnetic developing roller, the toner powder was adsorbed on the surface of the magnetic developing roller in a dense manner. Print quality was good.

Comparative Example 1

When the used magnetic developing roller was assembled to the toner cartridge to rotate the magnetic developing roller, the toner powder was not sufficiently adsorbed on the surface of the magnetic developing roller (Fig. 2-2). Print quality was poor.

Comparative Example 2

A commercially available intermediate trim diameter 0.10mm crimp wire brush was carried out in the same manner as in Example 1 except for rotating 4000 rpm, and the 50th manufactured magnetic phenomenon roller was observed in the same manner. Was not observed well (Fig. 2-3). When the self-developing roller was rotated by assembling the toner cartridge, the toner powder was not adsorbed on the surface of the self-developing roller in a dense manner. Print quality was normal.

According to the present invention, an aluminum alloy self-developing roll having a fine surface uneven structure (5 to 30 µm) has an excellent uneven structure on the surface thereof to be optimized for confinement of toner powder, thereby showing good toner powder adhesion and print quality.

Claims (1)

A regenerated aluminum alloy self-developing roller having a scratch-type microsurface uneven structure having a width of 5 to 40 µm formed in a substantially circular shape with respect to a rotation axis in a toner powder constriction portion.