KR101545915B1 - A Metal Sleeve Coated with Blackening for Fuser Fixing Unit and Manufacturing Method of thesame - Google Patents

Abstract

The present invention relates to a metal sleeve for a fixing device of an image forming apparatus of an image forming apparatus in which an inner side is rotated to abut against a supporting means of a heating element so as to provide a metal sleeve with Teflon coating to reinforce durability, A matrix constituting an outer shape of the metal sleeve; A black coating layer formed on the inner circumferential surface of the matrix, the black coating layer consisting of a primer layer thinly coated to enhance adhesion with the substrate and a Teflon layer coated on the inner circumferential surface of the primer layer, A method of manufacturing a metal sleeve for a fixing device, comprising the steps of: forming a cylindrical matrix by forming a metal sleeve in an outer shape by electroplating and then heat-treating the metal sleeve; Treating the matrix at a temperature of 40 to 60 DEG C to preheat; And a Teflon layer formed on the inner circumferential surface of the primary layer by spraying a Teflon coating solution on the inner circumferential surface of the primary layer to form a Teflon layer on the inner circumferential surface of the primary layer by spraying the coating liquid on the inner circumferential surface of the matrix. Coating a coating layer; After the heat treatment furnace is preheated at a temperature of 150 to 250 ° C., the mother coated with the black coating layer is introduced, and the mother coated with the black coating layer is heated at a temperature of 380 to 420 ° C. for 10 to 20 minutes to be heat treated Wherein the black coating is applied to the metal sleeve.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal sleeve for a fixing device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal sleeve for a fixing machine having a black coating and a method for manufacturing the metal sleeve, and more particularly, to a metal sleeve for a fixing machine, which is coated with a black coating by applying a Teflon coating to a metal sleeve, Sleeve and a method of manufacturing the same.

2. Description of the Related Art In general, an image forming apparatus, such as a copying machine, a printer, or a facsimile, which outputs information using toner, operates in such a manner that the toner ink is firmly pressed onto the recording paper from static electricity. To this end, an image forming apparatus is provided with an organic photo conductor drum (OPC drum) which generates electrons when light is received, and a fixing device for thermally pressing the toner on the recording paper by applying heat and pressure.

In more detail, with respect to the internal structure of the image forming apparatus, when the OPC drum is irradiated with a positive (+) electrolowed laser beam, electrons are generated in a portion irradiated with light, Electricity is applied to the OPC drum, and thereafter, toner particles of a small amount of powder charged with electricity are applied to the OPC drum, and the toner adheres only to the area of negative electricity, The toner attached to the drum sticks to the recording paper. At this time, the toner adhering on the recording paper is thermally pressed on the recording paper by a fixing device, so that the toner is firmly fixed to the recording paper, thereby outputting the printed material.

Here, the fixing device includes a heat roller for applying a predetermined heat to the print toner to melt the toner, and a backup roller for applying a predetermined pressure. In the case of the heat roller, heat is transferred to the recording paper A sleeve which is a roller which is used to constitute a sleeve.

In recent years, various image forming apparatuses have been used as the main factors determining the market dominance of the output speed and the life span of the image forming apparatus. Thus, in order to satisfy the demand for high speed output and high durability by the image forming apparatus, In place of the polyimide film material, the metal sleeve is rapidly replaced with a metal sleeve.

In addition, when a printer or a copier is used, the first output time (FPOT) and the pages per minute (PPM) are important indicators indicating the performance of the image forming apparatus. It is important to maximize the output speed. In addition, warming-up is required to turn on the printer or the copying machine in order to turn on the power of the printer or the standby mode and then to operate again. This is because the metal sleeve must be heated up to a certain temperature so as to melt the toner. The metal sleeve must absorb the heat from the heating element quickly. On the other hand, in order to increase the continuous output speed, the metal sleeve, which has been heated to a proper temperature, must be quickly compensated for temperature so that the same heat source can be continuously supplied to the subsequent recording sheets after the heat is rapidly lost to the recording paper.

However, in the conventional metal sleeve, the inner and outer surfaces of the metal sleeve have a high gloss of about 0.5 to 1.0 Rz. In addition, since most of the metal materials have high reflectance against heat and light, the temperature rise is not efficient. There has been a problem in that, when heat is generated using a halogen lamp, the rate of temperature rise is lowered as the light is reflected.

As a conventional technique disclosed by the present applicant for solving the above-mentioned problems, Korean Patent Publication No. 1164189 (Jul. 3, 2012) discloses that sodium hydroxide or potassium hydroxide per liter of water contains 200 to 500 g, 20 to 60 g of sulfuric acid salt, 20 to 60 g of sulfuric acid salt, 60 to 120 g of nitric acid salt and 20 to 60 g of polyoxyethylene glycol, polyoxyethylene lauryl amine, polyoxyethylene alkyl ether phosphate, An aqueous solution containing 1 to 4 g of a surfactant selected from Alkyl ether phosphate or Ammonium polyoxyethylene alkyl sulfate is mixed with the inner circumferential surface of the metal sleeve at a temperature of 70 to 100 ° C on the inner circumferential surface of the metal sleeve , Washed with water and hot air to form a black metal oxide layer on the inner circumferential surface of the metal sleeve, As is known according to settle appointed non-aluminum metal sleeve of an image forming apparatus, it characterized in that the heating rate is improved by minimizing the reflection of heat and light from the metal surface.

However, the above-mentioned prior art has a problem in that it is difficult to increase the absorption rate of heat and light which can satisfy the high speed of the output by applying it to the image forming apparatus that continuously generates electricity only by absorbing the light generated in the heating element.

In recent years, the printing speed of a printer or a copying machine has been continuously increasing. Since the inner circumferential surface of the metal sleeve must abut against the supporting means of the heating element to withstand a large number of rotational movements, It is the most important quality factor that determines the life of the product.

Accordingly, in order to make the inner circumferential surface of the metal sleeve black, it is simply coated with black paint or coated with a black resin, or a black coating layer is formed by an electrochemical method such as black chrome plating.

However, since the conventional metal sleeve has a low adhesion force between the coating layer and the metal sleeve, it is difficult to apply the metal sleeve to the fixing device. Further, recently, the surface of the metal sleeve itself is oxidized from the chemical blackening method to form a black oxide layer, Durability can be ensured. However, in the medium / high speed machine of 25 PPM or more, the coating layer peels off as shown in FIG.

Therefore, it is urgently required to develop a technology for a metal sleeve that absorbs heat and light more efficiently from a heating element located inside a metal sleeve, and has high durability characteristics capable of withstanding a large number of rotational movements due to friction with a heating element supporting structure .

An object of the present invention is to solve the problems as described above. Since the fluororesin-based Teflon is coated on the inner surface by the black coating, the first output time (FPOT) of the image forming apparatus is shortened by efficiently absorbing heat and light from the heating element, Which can improve the output speed (PPM), and a method of manufacturing the metal sleeve.

In addition, the present invention is to provide a metal sleeve for a fixing machine having a black coating which can achieve high durability and high abrasion resistance because the metal layer and the blackened coating layer are integrated so as to have strong adhesion force, and a method for manufacturing the same.

A metal sleeve for a fixing device proposed by the present invention is a metal sleeve for a fixing device of a fixing device of an image forming apparatus, the inside of which is rotated so as to abut against a supporting means of a heating element, the metal sleeve comprising: a matrix constituting an outer shape of the metal sleeve; And a black black coating layer formed on the inner circumferential surface of the mother body, the black coating layer consisting of a primer layer thinly coated to enhance adhesion with the substrate and a Teflon layer coated on the inner circumferential surface of the primer layer.

The black coating layer may be formed of at least one of fluorine resin-based components of polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, and ethylene tetrafluoroethylene Of the fluororesin-based component.

The primer layer of the black coating layer is formed to a thickness of 1 to 100 microns, and the Teflon layer is formed to a thickness of 5 to 100 microns.

The metal sleeve for a fixing machine having the black coating treatment is configured to have a light absorption rate of 93 to 98%.

The present invention may further comprise a black outer black coating layer formed on the outer circumferential surface of the mother body and having a primer layer and a Teflon layer corresponding to the black coating layer.

In the method for manufacturing a metal sleeve for a fixing machine of the present invention, the method for manufacturing a metal sleeve for a fixing device according to the present invention comprises the steps of: forming a cylindrical matrix by forming a metallic sleeve by electroplating; Treating the matrix at a temperature of 40 to 60 DEG C to preheat; And a Teflon layer formed on the inner circumferential surface of the primary layer by spraying a Teflon coating solution on the inner circumferential surface of the primary layer to form a Teflon layer on the inner circumferential surface of the primary layer by spraying the coating liquid on the inner circumferential surface of the matrix. Coating a coating layer; After the heat treatment furnace is preheated at a temperature of 150 to 250 ° C., the mother coated with the black coating layer is introduced, and the mother coated with the black coating layer is heated at a temperature of 380 to 420 ° C. for 10 to 20 minutes to be heat treated Step.

The black coating layer may be formed of at least one of fluorine resin-based components composed of polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, and ethylene tetrafluoroethylene One fluororesin-based material is used.

The black coating layer is coated with the primer layer to a thickness of 1 to 100 microns, and the Teflon layer is coated to a thickness of 5 to 100 microns.

In the step of coating the black coating layer, the primer layer is formed on the mother body and then heat-treated at a temperature of 50 to 150 ° C.

Further, the present invention may further comprise a step of sequentially spraying the coating liquid of the primer layer and the Teflon layer on the outer circumferential surface of the mother body so as to correspond to the black coating layer, and coating a black outer black coating layer.

According to the metal sleeve for a fixing device of the present invention and the method of manufacturing the same, since the black coating layer of the fluororesin type is formed on the inner surface, the reflection phenomenon against heat and light is blocked while the absorption efficiency against heat and light is increased, Can be greatly improved.

In addition, since the metal sleeve for a fixing device according to the present invention and the method for manufacturing the same provide a primary layer between the matrix of the metal sleeve and the Teflon layer, the adhesion of the black coating layer to the metal layer can be increased, The life of the metal sleeve due to high durability and high abrasion resistance can be significantly extended.

Further, the metal sleeve for a fixing machine according to the present invention and the method for manufacturing the same provide a black outer coat layer on the outer circumferential surface of the metal sleeve base, so that heat can be transmitted more efficiently to maximize a heating rate, It is effective.

FIG. 1 is an exemplary photograph showing a state in which a metal oxide layer having a conventional black oxide metal layer is peeled off. FIG.
FIG. 2 is a perspective view showing an embodiment of a metal sleeve for a fixing device according to the present invention; FIG.
3 is a cross-sectional view showing an embodiment of a metal sleeve for a black coating-treated fixing device according to the present invention.
FIG. 4 is a perspective view showing another embodiment of a metal sleeve for a black coating-treated fixer according to the present invention. FIG.
5 is a block diagram showing an embodiment of a method of manufacturing a metal sleeve for a black coating-treated fixer according to the present invention.
FIG. 6 is a block diagram showing another embodiment of a method of manufacturing a metal sleeve for a fixer according to the present invention; FIG.

The present invention relates to a metal sleeve for a fixing device of an image forming apparatus, wherein an inner side of the metal sleeve is configured to rotate in contact with a heating means holding means, the metal sleeve comprising: a matrix constituting an outer shape of the metal sleeve; A black coating layer formed on the inner circumferential surface of the matrix, the black coating layer consisting of a primer layer thinly coated to enhance adhesion with the substrate and a Teflon layer coated on the inner circumferential surface of the primer layer, The metal sleeve for the fixing device is characterized by the technical structure.

The black coating layer may be formed of at least one of fluorine resin-based components of polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, and ethylene tetrafluoroethylene The present invention is characterized by a metal sleeve for a fixing machine which is made of a material to which one fluororesin-based component is applied.

Also, the primary layer of the black coating layer has a thickness of 1 to 100 microns and has a black coating-treated metal sleeve for a fixing machine.

Also, the Teflon layer of the black coating layer has a thickness of 5 to 100 microns and has a black coating-treated metal sleeve for a fixing machine.

Further, the metal sleeve for a fixing machine having a black coating treatment is characterized by a black sleeve-coated metal sleeve having a light absorptance of 93 to 98%.

The present invention further provides a black sleeve-coated metal sleeve formed on the outer circumferential surface of the mother body and further comprising a black outer black coating layer having a primer layer and a Teflon layer corresponding to the black coating layer, do.

According to another aspect of the present invention, there is provided a method of manufacturing a metal sleeve for a fixing device, comprising the steps of: forming a metal matrix by electroplating to form an outer shape of a metal sleeve; Treating the matrix at a temperature of 40 to 60 DEG C to preheat; And a Teflon layer formed on the inner circumferential surface of the primary layer by spraying a Teflon coating solution on the inner circumferential surface of the primary layer to form a Teflon layer on the inner circumferential surface of the primary layer by spraying the coating liquid on the inner circumferential surface of the matrix. Coating a coating layer; After the heat treatment furnace is preheated at a temperature of 150 to 250 ° C., the mother coated with the black coating layer is introduced, and the mother coated with the black coating layer is heated at a temperature of 380 to 420 ° C. for 10 to 20 minutes to be heat treated The method comprising the steps of: (a) preparing a metal sleeve for a fixing device;

The black coating layer may be formed of at least one of fluororesin-based components composed of polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, and ethylene tetrafluoroethylene. A method of manufacturing a metal sleeve for a fixing machine in which a black coating process is performed, the metal sleeve being made of a material to which any one of fluororesin-based components is applied.

The black coating layer is formed by coating the primer layer with a thickness of 1 to 100 microns and coating the Teflon layer with a thickness of 5 to 100 microns.

In addition, in the step of coating the black coating layer, the primary layer is formed on the mother body and then heat-treated at a temperature of 50 to 150 ° C.

The present invention further includes a step of sequentially spraying the coating liquid of the primer layer and the Teflon layer on the outer circumferential surface of the mother body so as to correspond to the black coating layer to coat a black outer black coating layer, The manufacturing method of the metal sleeve is characterized by the technical constitution.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of a metal sleeve for a fixing device and a method of manufacturing the same according to the present invention will be described in detail with reference to the drawings.

However, the embodiments of the present invention may be modified into various forms, and the scope of the present invention is not construed as being limited to the embodiments described below. The embodiments of the present invention are provided so that those skilled in the art can understand the present invention and the shapes and the like of elements shown in the drawings are exemplarily shown to emphasize a clearer description.

2 and 3, in the metal sleeve S for the fixing device of the image forming apparatus, the metal sleeve for a black coating-treated fixer according to the present invention comprises a matrix 10, (20).

The metal sleeve S is installed in a fixing device of a general image forming apparatus, and the inside of the metal sleeve S is rotatably contacted with a supporting means of a heating element (not shown).

The matrix 10 forms an outer shape of the metal sleeve S and has a predetermined length and diameter and has a hollow cylindrical shape. That is, the matrix 10 is formed in a structure in which a heating element can be positioned in an inner hollow space.

In the above, the heating element is mainly installed in the center of the inner surface of the metal sleeve (S) to generate light or heat. The indirect heating type halogen lamp, the ceramic heater having the direct heating type, and the high frequency induction heater are used It is possible.

The matrix 10 is made of a metal material. For example, the matrix may be formed of a material selected from the group consisting of nickel (Ni), nickel and iron alloy (Ni / Fe), nickel and cobalt, nickel and manganese (Ni / Mn), nickel and tin And a metal material such as zinc (Ni / Zn), nickel and copper (Ni / Cu), chromium (Cr), and copper Cu.

The black coating layer 20 is coated on the inner circumferential surface of the matrix 10 in the form of a thin film so as to transmit heat and light generated from the heating element to the matrix 10.

The black coating layer 20 is made of a fluororesin-based material. That is, the black coating layer 20 may be formed of at least one selected from the group consisting of polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, ethylene tetrafluoroethylene, A fluororesin-based component is applied.

As shown in FIGS. 2 and 3, the black coating layer 20 is made of black and comprises a primer layer 21 and a Teflon layer 23.

The primer layer 21 is thinly coated on the inner circumferential surface of the matrix 10 so as to enhance adhesion with the main material constituting the Teflon layer 23.

The primer layer 21 of the black coating layer 20 is coated to a thickness of 1 to 100 microns.

The primer layer 21 is preferably coated in the range of 3 to 7 microns thick considering the operation time and cost.

The primer layer 21 is composed of a fluororesin containing a large amount of a perfluoroalkoxy (PFA) series, which is used in combination with a fluororesin-based component and has excellent non-magnetic property and adhesion to a metal.

The perfluoroalkoxy has the advantage of having a high critical temperature for continuous use while forming a nonporous layer, and is capable of easily raising the coating thickness.

The Teflon layer 23 is a main coating layer for securing curing conditions and abrasion resistance. The Teflon layer 23 is formed by coating Teflon on the inner circumferential surface of the primer layer 21.

The Teflon layer 23 of the black coating layer 20 is coated to a thickness of 5 to 100 microns.

The Teflon layer 23 is preferably coated to a thickness of 5 to 15 microns in consideration of the operation time and the cost.

The Teflon layer 23 is formed by using a fluorine resin-based material in combination with a polytetrafluoroethylene (PTFE) -based material having a high abrasion resistance and heat resistance.

In the above, polytetrafluoroethylene has the highest operating temperature (290 ° C) among the fluorine resins, has a very low coefficient of friction, and is excellent in abrasion resistance and chemical resistance.

The black coated metal sleeve (S) coated with the black coating layer (20) forming the primary layer (21) and the Teflon layer (23) on the mother body (10) has a light absorptance Respectively. That is, the light absorption rate was measured using a UV spectrophotometer. As a result, a light absorption rate of 93 to 98%, which is about three times as much as the absorption rate (25 to 35%) of samples without black coating, is increased.

4, the metal sleeve for a fixing device according to the present invention is formed on the outer circumferential surface of the matrix 10 and has an initial layer 21 (corresponding to the black coating layer 20) And a black external black coating layer 30 having a Teflon layer 23.

Preferably, the outer black coating layer 30 is selectively formed on the outer circumferential surface of the metal sleeve S. That is, the external black coating layer 30 is applied only to the metal sleeve of the black-and-white fixing unit of the fixing unit. More specifically, in the case of a fixing device for a color, Teflon or perfluoroalkoxy rubber is coated on the outer circumferential surface of the metal sleeve. Therefore, when the outer black coating layer 30 is formed on the outer circumferential surface of the metal sleeve, Teflon or perfluoroalkoxy rubber There is a fear of causing poor adhesion at the time of coating.

As described above, if the outer surface of the metal sleeve body is formed with the outer black coating layer, it is possible to maximize the heating rate and to reinforce the rigidity by more efficiently transferring heat.

Next, an embodiment of a method of manufacturing a metal sleeve for a fixer according to the present invention, which is coated with black, will be described with reference to the drawings.

5, a method of manufacturing a metal sleeve for a fixing device according to an embodiment of the present invention includes a step (S10) of manufacturing a matrix 10, a step of forming a matrix (S30) of coating the black coating layer 20, and a step S40 of performing a heat treatment.

In the step S10 of manufacturing the matrix 10, the metal matrix S is formed by electroplating to form the outer shape of the metal sleeve S, followed by heat treatment to produce the cylindrical matrix 10. [

The matrix 10 may be made of a material selected from the group consisting of Ni, Ni and Fe, Ni and Co, Ni and Mn, Ni and Sn, , Nickel and zinc (Ni / Zn), nickel and copper (Ni / Cu), chromium (Cr) and copper Cu).

Since the method of manufacturing the matrix 10 constituting the metal sleeve S corresponds to the area of the conventional art, detailed description thereof will be omitted.

In step S20 of preheating the mother body 10, the mother body 10 is preheated by treating the mother body 10 at a temperature of 40 to 60 캜 before coating the black coating layer 20 on the mother body 10. Preferably, the matrix 10 is preheated at a temperature of 45 to 55 ° C.

By preheating the mother body 10 before coating as described above, it is possible to improve the adhesion between the mother body 10 and the black coating layer 20 in the process of coating the black coating layer 20. [

In step S30 of coating the black coating layer 20, black coating is performed twice on the inner circumferential surface of the matrix in black.

The material used for forming the black coating layer 20 is a material to which a fluororesin-based component is applied. That is, the material of the black coating layer is a fluororesin-based component composed of polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, and ethylene tetrafluoroethylene A fluororesin-based component is applied.

In general, the polytetrafluoroethylene (PTFE) component has the highest operating temperature of 290 ° C in the fluororesin, has a very low coefficient of friction, and is excellent in abrasion resistance and chemical resistance. In addition, fluorinated ethylene propylene (FEP) forms a nonporous film in the sintering process and exhibits low coefficient of friction and excellent tackiness due to its chemical and corrosion resistance. Perfluoroalkoxy (PFA) is also advantageous in that it has a high critical temperature for continuous use while forming a nonporous layer, such as fluorinated ethylene propylene, and can easily increase the coating thickness. In addition, ethylene tetrafluoroethylene (ETFE) has a low use temperature but the highest coating strength and is capable of raising the thickness up to 2500 microns.

In order to coat the black coating layer 20, a primer layer 21 and a Teflon layer 23 are sequentially coated on the matrix 10.

The coating liquid is first sprayed to directly contact the inner circumferential surface of the matrix 10 to form a thin layer 21 (S31).

As the coating solution of the primer layer 21, a fluororesin containing a large amount of perfluoroalkoxy series excellent in adhesion property with metal is used.

The primer layer 21 is coated to a thickness of 1 to 100 microns. It is most preferable that the coating layer is coated to a thickness of 3 to 7 microns considering the work time and cost as well as the adhesiveness with the Teflon layer 23.

In the step S30 of coating the black coating layer 20, the primer layer 21 is formed on the mother body 10 and then heat-treated at a temperature of 50 to 150 ° C. Preferably, the initial layer 21 is heat-treated at a temperature of 90 to 110 ° C.

The Teflon layer 23 is coated on the inner circumferential surface of the primer layer 21 by spraying the main Teflon coating solution to form the Teflon layer 23 S33).

As the coating liquid for the Teflon layer (23), a fluororesin containing a large amount of polytetrafluoroethylene type resin excellent in abrasion resistance and heat resistance is used.

The Teflon layer 23 is coated to a thickness of 5 to 100 microns. Further, the Teflon layer 23 is preferably coated to a thickness of 5 to 15 microns in consideration of the operation time and cost.

In the heat treatment step S40, the mother body 10 coated with the black coating layer 20 is heated in a heat treatment furnace at a constant temperature, and then heat-treated.

In this case, the temperature of the heat treatment is preferably minimized within a temperature at which the mother body 10 does not undergo annealing by heat treatment. That is, the mother body 10 coated with the black coating layer 20 is heated at a temperature of 380 to 420 ° C. for 10 to 20 minutes.

In the heat-treating step (S40), the heat treatment furnace to which the mother body 10 coated with the black coating layer 20 is charged is preheated to a predetermined temperature.

In the preheating of the heat treatment furnace, the inside of the heat treatment furnace is preheated at a temperature of 150 to 250 ° C, and then the mother body 10 coated with the black coating layer 20 is introduced.

As described above, when the metal sleeve is put in a state in which the heat treatment furnace is preheated, it is possible to reduce the thermal shock in the heat treatment furnace, thereby reducing the hardness of the matrix and preventing oxidation on the surface.

Another exemplary embodiment of a method for manufacturing a metal sleeve for a fixing device according to the present invention is a method for manufacturing a metal sleeve for a fixing device, comprising the steps of: forming an initial layer (21) on the outer circumferential surface of the matrix (10) And the coating liquid of the Teflon layer 23 are successively sprayed to coat the black outer black coating layer 30 (S35).

The outer black coating layer 30 is configured to be applied only to the metal sleeve S of the black and white fixing unit in the metal sleeve S.

The external black coating layer 30 is coated by a spray method using a nozzle.

The light absorption rate, the adhesion force, and the heating rate of the metal sleeve were measured and measured by the method of manufacturing the metal sleeve for a fixing machine according to the present invention. However, the following examples are for illustrative purposes only and the present invention is not limited thereto.

Example  One : Inner circumference Black coated Metal sleeve  Produce

One) Fluorine resin  Depending on the ingredient Metal sleeve  Produce

A total of 40 kinds of fluorine resins were prepared on the inner peripheral surface of a Ni metal sleeve (thickness: 40 microns, length: 238 mm, inner diameter: 30 mm) having a purity of 99% or more manufactured by the electroplating method in combination with 5 primer layers and 8 Teflon layers Coated samples were made.

Here, five samples were manufactured for each group, and a total of 200 black coated metal sleeves were manufactured. The black coating method is a spraying method developed and used by our company. It injects a fluorocarbon liquid mixed with air into a metal sleeve (mother body) rotating at a constant speed. It is sprayed with a constant thickness by a nozzle moving left and right , Which is a structure commonly used in syntactic coating machines. At this time, the thickness of the coating layer was easily controlled by appropriately controlling the pressure of the air sprayed with the coating liquid and the conveying speed of the spray gun moving to the left and right.

The initial layer coating thickness was controlled to a thickness of 4 to 6 microns in all samples. The metal sleeve was preheated to 50 ° C for 10 minutes to increase the adhesion between the primer layer and the matrix metal surface prior to coating the inner layer of the metal sleeve, This is to prevent the problem that the non-dried coating layer flows down in the atmospheric air atmosphere process for performing the firing operation at 100 ° C for 30 minutes after the initial layer coating to prevent the coating thickness from becoming constant.

After the firing process of the primary layer was completed, the Teflon layer was coated on the hardened primary layer in the same type of coating machine, but after the firing of the primary layer, the product temperature was maintained at room temperature. After much trial and error, the Teflon layer was found to be easily cracked immediately after the coating, when the surface temperature was high, unlike the first layer coating. The thickness of the Teflon layer for all samples was controlled to a thickness of 9 to 11 microns.

After preliminary drying at room temperature, the metal sleeve is put into a heat treatment furnace heated to 200 ° C., and the temperature is maintained at a temperature of 395 to 405 ° C. for 15 minutes. Then, the power of the heat treatment furnace is turned off, And furnace cooling is performed until the temperature reaches 200 ° C.

The reason for heating up to 200 ° C in the heat treatment is that when it is heated from room temperature, the time for stagnation in the heat treatment furnace becomes longer, thereby preventing oxidation discoloration on the uncoated outer circumferential surface. In addition, the reason for gradually cooling to 200 ° C. after the heat treatment is to prevent the coating surface of the Teflon layer from being cracked due to the rapid temperature drop.

In order to maintain the surface appearance of the hollow tube product with a thin metal material under high temperature heat treatment condition, it was inserted into an aluminum pipe having an inner diameter larger than the outer diameter of the metal sleeve by 0.3 to 1 mm and then heat-treated. In other words, aluminum pipe was inserted and heat treated to prevent elliptical sagging due to its own weight during the high temperature heat treatment.

In the heat treatment for the Teflon layer, the fluorine resin layer is rapidly dried at a high temperature and gas (GAS) is generated. Since the gas stagnated inside the heat treatment furnace causes chemical discoloration on the surface of the product, The gas must be released, which is a forced exhaust.

A sample of 5 × 10 cm 2 was taken from each sample group and the adhesion was measured under the condition similar to the actual operating environment by using the adhesion measuring device. At this time, it is natural to measure the light absorptivity of various kinds of black coating layers.

The evaluation index of the adhesion was measured and recorded the number of times the black coating layer was peeled off by the tungsten tip moved to the right and left.

Table 1 below is averages of the results of five samples in each group. The surface temperature of the sample is 200 DEG C and the applied load is 30 kg / cm < 2 >.

Sample group Light absorption (%) Adhesion (number of reciprocations, times) Rating Rating One 88.3 3.2


The light absorption rate and
Adhesion inadequacy

2 89.4 5.5 3 88.6 4.4 4 87.7 3.0 5 88.5 5.2 6 90.0 5.7 7 89.1 3.1 8 87.5 1.9 9 94.0 19.0


Good light absorptivity
And adhesion failure

10 95.9 26.5 11 97.8 15.3 12 95.2 17.8 13 97.5 19.2 14 98.7 16.7 15 96.1 20.9 16 94.1 15.7 17 92.6 22.9


Good light absorptivity
And good adherence

18 91.7 25.0 19 90.8 26.4 20 94.0 24.3 21 93.5 25.6 22 93.3 21.6 23 93.5 25.5 24 92.8 23.0 25 97.1 55.1


Optimum light absorption
And adhesion

26 96.5 58.8 27 96.9 69.3 28 95.8 61.2 29 92.6 57.6 30 94.2 59.0 31 95.7 56.2 32 94.0 58.1 33 92.3 24.8


Good light absorptivity
And good adherence

34 94.8 28.4 35 95.4 29.2 36 94.2 26.9 37 92.0 22.6 38 93.1 25.7 39 92.8 25.8 40 93.6 28.3

Example  2 : Black coated Metal sleeve  Property Inspection

One) Black coating  Thickness measurement

The black coating thickness was measured for all 200 samples prepared in Example 1 using an electromagnetic induction coating film thickness meter (Model LZ-330W). As a result, it was confirmed that the thickness of the black coating layer was in the range of 10 to 20 microns in all the samples.

2) Measurement of light absorption rate

All 200 samples prepared in Example 1 were measured for light absorptivity in the range of 200 to 1000 nm using a UV-visible spectrophotometer. As a result, the absorptivity was found to be 87 to 98% It was found that the absorption rate of light increased about three times by the treatment.

Example  3: Black coated Metal sleeve Heating  Speed check

The rate of temperature rise was measured by fabricating black coated metal sleeves, chemical blackened metal sleeves and untreated metal sleeves, respectively. The rate of temperature rise was the time at which the temperature inside the metal sleeve reached 180 DEG C, which was the temperature at which the image fixer was used, and the light absorption rate and adhesion were measured in the same manner as in Example 1 to calculate the final measured average value. .

sample Light absorption (%) Heating rate (sec) Adhesion (times) Teflon black coating 93.1 12.5 55.7 chemical blackening treatment 90.9 13.2 18.1 Untreated product family 28.5 17.4 N / A

As can be seen from Table 2, the metal sleeve having the inner circumferential surface coated with the fluororesin of the present invention coated with the black coating of the Teflon increases the absorption rate of light generated from the halogen lamp, and when applied to the fixing device, Lt; RTI ID = 0.0 > C, < / RTI > while the adhesion of the coating layer was doubled.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It is possible to carry out various modifications, and this is also within the scope of the present invention.

10: Matrix 20: Black coating layer
21: initial layer 23: Teflon layer
30: external black coating layer S: metal sleeve

Claims (11)

And the inner side is configured to rotate in contact with the supporting means of the heating element,
A matrix forming an outer shape of the metal sleeve;
A black coating layer on the inner circumferential surface of the matrix, the black coating layer being composed of a primer layer thinly coated to enhance adhesion with the substrate and a Teflon layer coated on the inner circumferential surface of the primer layer, Metal sleeve for fixer.
The method according to claim 1,
The black coating layer may be formed of at least one of fluorine resin-based components of polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, and ethylene tetrafluoroethylene Of a fluororesin-based component is applied to the metal sleeve.
The method according to claim 1,
Wherein the initial layer of the black coating layer has a thickness of 1 to 100 microns.
The method according to claim 1,
Wherein the Teflon layer of the black coating layer has a thickness of 5 to 100 microns.
The method according to claim 1,
Wherein the black coating-treated metal sleeve has a light absorptance of 93 to 98%. ≪ RTI ID = 0.0 > 15. < / RTI >
The method according to any one of claims 1 to 5,
And a black outer black coating layer formed on an outer circumferential surface of the matrix and having a primer layer and a Teflon layer corresponding to the black coating layer.
A method of manufacturing a metal sleeve for a fixing machine,
Forming a cylindrical matrix by forming an outer shape of the metal sleeve by electroplating, and then performing heat treatment;
Treating the matrix at a temperature of 40 to 60 DEG C to preheat;
And a Teflon layer formed on the inner circumferential surface of the primary layer by spraying a Teflon coating solution on the inner circumferential surface of the primary layer to form a Teflon layer on the inner circumferential surface of the primary layer by spraying the coating liquid on the inner circumferential surface of the matrix. Coating a coating layer;
After the heat treatment furnace is preheated at a temperature of 150 to 250 ° C., the mother coated with the black coating layer is introduced, and the mother coated with the black coating layer is heated at a temperature of 380 to 420 ° C. for 10 to 20 minutes to be heat treated Wherein the black coating is applied to the metal sleeve.
The method of claim 7,
The black coating layer may be formed of at least one of fluorine resin-based components composed of polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, and ethylene tetrafluoroethylene A method for manufacturing a metal sleeve for a fixing machine, which is made of a material to which one fluororesin-based component is applied.
The method of claim 7,
Wherein the black coating layer is coated with the primer layer to a thickness of 1 to 100 microns and the Teflon layer is coated to a thickness of 5 to 100 microns.
The method of claim 7,
Wherein the step of coating the black coating layer comprises forming the primary layer on the mother body and then performing the heat treatment at a temperature of 50 to 150 ° C.
The method according to claim 7 or 8,
Coating a black external black coating layer on the outer circumferential surface of the mother body by sequentially spraying the coating liquid of the primer layer and the Teflon layer to correspond to the black coating layer, Way.

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