JP4863723B2 - Endless belt release method and apparatus - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for releasing an electrodeposited film from a matrix when producing an endless belt formed on a metal matrix by electroforming, and forms an image such as an electrophotographic apparatus or electrostatic recording apparatus. The present invention relates to a fixing belt used in the apparatus and means relating to the manufacture of a belt substrate serving as a substrate such as an organic photoreceptor.

  In an electroforming process, a method of forming a release coating is mainly used as a method of releasing an electrodeposition coating from a mother mold after forming an electrodeposition coating of a predetermined thickness on a mother die or an electroforming mold by electroplating. ing. As a method for forming a release film, there are a mechanically treated film method in which wax or grease is applied, a chemical treatment film method in which an anodic electrolysis in a 10% NaOH solution or a chemical treatment solution such as a chromic acid solution is used.

  However, these treatment coating methods have a problem that the cost of treating the waste liquid of the treatment agent is high, the environmental resistance is poor, and the coating accuracy is low. As chemical treatment methods, mold release agents based on organic iodine-based chemicals (for example, see Patent Document 1) that have been improved in terms of environmental resistance and coating accuracy, and drugs made from thiourea derivatives (see Patent Document 2) have been proposed. ing. Furthermore, a chemical oxide film forming method (see, for example, Patent Document 3) that can form a release film by a completely dry method has been proposed.

  All of these are methods of releasing treatment by forming a release film on the surface of the mold in advance, and the range of application is wide. However, in the case of releasing from cylindrical objects such as endless belt members, an electrodeposition film is formed. Due to the influence of the stress generated on the film due to the bath prescription and electrodeposition conditions, the adhesion to the mold becomes more severe, and the release can be released by these release film forming methods is limited by the stress adjustment by additives etc. It had a coating characteristic. In the case of this method, a process for forming a release film before electroforming and its dedicated equipment are required.

  On the other hand, as a mold release treatment method in the endless belt form system, after the electrodeposition film is formed as a mold release method from the cylindrical mother mold, the end face part after electroforming is peeled and cut to facilitate the mold release process. (For example, see Patent Document 4), and in addition, a method for releasing mold by supplying compressed air into the electrodeposited film that is in close contact after the end face treatment has been proposed (for example, see Patent Document 5). Yes. In the case of this method, an end face peeling process is required to facilitate mold release before the mold release process, which complicates the matrix structure and increases costs. In addition, a stress reducing agent is added to control the stress of the film. For endless belts that require limited amount and limited coating properties and require coating properties with high hardness and toughness, there is a limit to obtaining reliable release properties, and high-efficiency release processing Has become difficult.

  On the other hand, the nickel alloy plating film electrodeposited on the cylindrical mother mold is released by using electromagnetic induction heating and heating only the plating film directly to generate a thermal expansion difference between the mother mold and the coating film. A method (see, for example, Patent Document 6) has been proposed. In this method, a high-frequency inverter with an output of 100 KHz is applied to control the heating, but the operating frequency is normally restricted to a range from 20 KHz to 100 KHz by the radio wave method, and considering the efficiency, it is several tens of KHz. It is desirable to operate at an operating frequency of a certain degree, and it is considered that less than 40 KHz is more desirable in consideration of avoiding influence on a standard telephone signal such as a telegraph Morse signal.

  However, as the film thickness of the film to be released becomes thinner, the operating frequency must be set higher due to the relationship with the heat generation skin depth due to the inherent characteristics of the film. It becomes difficult. In addition, in order to increase the heat generation efficiency, it is necessary to make the gap between the plating film surface and the heating element as small as possible, and it is necessary to increase the positional accuracy of the jig relative to the heating device. There is a problem that it is necessary to manage the position of the jig with high accuracy, and management in manufacturing is difficult and costly.

In this way, in the production of endless belt-shaped members used for fixing belts, the releasability from the cylindrical matrix greatly changes depending on the prescription and electrodeposition conditions at the time of film formation, and it can be produced from the aspect of releasability The types of electrodeposition coatings are limited, and it has been difficult to produce a thin-walled endless belt with coating properties with better wear resistance and flex resistance by a manufacturing method that fully considers environmental properties. .
Japanese Patent No. 2933986 JP 2000-129484 A Special registration No. 2632812 JP 2003-55787 A Japanese Patent Laid-Open No. 5-98487 JP-A-6-75489

  Accordingly, an object of the present invention is to overcome the above-mentioned problems and to fix a wide range of electric power which can be improved in performance such as heat resistance, wear resistance, and bending resistance, which has been difficult to manufacture with conventional methods in fixing belt members and the like. It is an object of the present invention to provide a simple and highly efficient demolding method and apparatus in consideration of the environmental performance that enables the production of a belt member having a deposited film characteristic.

  In order to solve the above problems, the present inventors have conducted intensive studies, and as a result, supply a high-pressure liquid to the interface between the matrix surface and the electrodeposited coating formed by electroforming to form a thin film fluid at the coating interface. The present invention has been found to work as an effective release film.

That release method of the endless belt of the present invention is formed on a side surface of a cylindrical metal master mold, at least the end surface of one end of a cylindrical metal matrix electrodeposition coating exposed on the side surface of the cylindrical metal mother die It is characterized in that a liquid is sprayed onto the interface portion to release the electrodeposition coating from the cylindrical metal matrix.

Furthermore, the endless belt mold release device of the present invention is a mold release device that forms an endless belt by subjecting the mother die to electroforming and depositing an electrodeposited film, and then releases the endless belt from the surface of the mother die. And, it is arranged on the end face part of the endless belt, and is characterized in that means for discharging liquid is provided at the interface between the matrix and the endless belt.

In the conventional mold release method, the present invention enables the release of a belt having high hardness and coating properties in a high strength region, which is difficult to release, and is required for a fixing belt or the like. It has become possible to provide an endless belt base material having a wide range of coating properties that are superior in durability and wear resistance.

  The mold release method according to the present invention has the highest merit as the mold release method of an endless belt that has high hardness and strength, a small coefficient of thermal expansion, and is subjected to strong stress on the adhesion to the mother mold. It can also be applied to general mold release methods.

A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an example of an endless belt release device and a release method according to an embodiment of the present invention. An insulating ring 6 is set on both ends of the cylindrical metal mother die 1, and then an endless belt is formed by depositing an electrodeposited film 2 by electroforming. Thereafter, one insulating ring 6 is removed, and a belt clamp 7 The side from which the insulating ring 6 of the cylindrical metal matrix 1 on which the electrodeposition coating 2 is formed is removed from the matrix cradle 5 provided with the injection nozzle ring in which the high-pressure liquid injection nozzles 3a and 3b are disposed, It arrange | positions so that the injection nozzles 3a and 3b may be opposed. The exposed end face portion of the electrodeposited film 2 formed on the cylindrical metal matrix 1 is disposed such that the spray angle α of the liquid spray nozzles 3a and 3b is 30 to 45 ° and the spray distance L is 5 to 20 mm.

In Figure 1, although an insulating ring, to prevent the electrodeposition coating is formed, cylindrical metal matrix type aluminum by the end eg anodized a metallic material capable of forming the insulating film, titanium Alternatively, it may be made of a material such as tungsten, or a thin film made of the aforementioned metal material that can be anodized is formed on the surface of a cylindrical metal matrix, and the surface may be oxidized by anodization. In this case, it is also possible to form a thin film made of the above metal material that can be anodized only on the bottom surface instead of the side surface, and oxidize the surface by anodization. Even if the electrodeposited coating only on the bottom surface of the cylindrical metal base mold is not formed, since the surface of the cylindrical metal mold and the conductive析被film is formed on the side surface of the metal mother die, ejects a liquid to the interface it is possible to form a release coating consisting of liquid at the interface between the electrodeposition coating and the cylindrical metal mold by.

FIG. 2 is an enlarged view showing the relationship between the electrodeposited film 2 formed on the cylindrical metal matrix and the liquid ejected from the ejection nozzles 3a and 3b. Positioning and spraying the liquid sprayed from the spray nozzles 3a and 3b at the spray angle α at the interface with the cylindrical metal matrix 1 at the end of the electrodeposited film 2 causes the electrodeposited film by the water flow of the liquid. 2 is pushed up, the liquid enters the interface between the electrodeposition coating 2 and the cylindrical metal matrix 1, and a thin film release coating is formed on the entire interface between the cylindrical metal matrix 1 and the electrodeposition coating 2. Release is possible.

The cross-sectional shape of the cross section 2a of the end surface of the electrodeposition coating 2 are the inclined shape at an angle to the substantially vertical shape and a cylindrical mold surface followed by the surface of the cylindrical metal mold 1 Yes.

It is preferable that the belt end surface portion serving as a portion for introducing the ejected liquid has a shape that can easily push up the end surface of the electrodeposited film 2 by the water flow of the ejected liquid. In this shape, it is preferable that the height of the straight portion coating in which at least the end portion of the coating is substantially perpendicular to the surface of the cylindrical mold with respect to the surface of the cylindrical metal mother die 1 is 50% or more of the total thickness. Furthermore, it is determined by the angle formed by the matrix surface and the film thickness direction. When the angle formed between the matrix surface and the film thickness direction is β, the minimum value of β1 is β1, and the maximum value is β2, β1 is preferably 45 ° or more, more preferably 60 ° or more. . As for the maximum value of the angle, if the maximum value of the angle is β2, β2 is preferably 135 ° or less, and more preferably 120 ° or less.

In FIG. 3, the liquid enters the interface between the electrodeposited film 2 and the cylindrical metal matrix 1 when the sprayed liquid peels off the end surfaces of the cylindrical metal matrix 1 and the electrodeposited film 2. A minute gap serving as a jet liquid introducing portion is formed. The cross-sectional shape of the gap formed by the peeling process of the end face is a gap having a shape substantially similar to a right triangle. The shape of the triangle, a height of about 5 to 10 [mu] m, the angle between the electrodeposition coating film 2 and the matrix surface is extremely small gap of approximately 2 to 5 °.

  A minute gap is formed at the end of the electrodeposited film by cutting off one end of the film end after electroforming, and then using a guide ring from the notched end to peel off the film along the ring. can do. It is also possible to insert a wedge shape along the shape of the mold surface.

  In order to make the coating end face into a predetermined shape, the jet liquid is interfaced by using a non-conductive material that has a straightness of the end face of the masking material and an elastic non-conductive material that can adhere to the matrix. It is possible to form a cross-sectional shape of the coating end face that is easy to introduce from. That is, it can be produced in an arbitrary shape by controlling the cross-sectional shape of the end face of the masking material.

  The shape of the electrodeposited film end is defined by the shape of the insulating ring that is a masking material. 4 to 6 are examples in which a desired shape is formed at the end portion of the electrodeposited film using the shape of the end portion of the insulating ring 6.

4 and 6 form a electrodeposition coating film provided with projections of triangular cross-section in the cylindrical metal mold 1 side end portion of the insulating ring 6 is masking material, the boundary surface between the matrix 1 and the electrodeposition coating 2 This is an example in which a minute space 10 is formed.

  The minute space 10 has the same action as the minute gap formed when the end surface portion of FIG. 3 is peeled off. The cross-sectional shape of the minute space 10 is a right triangle like the minute gap in FIG. 2, and the height from the matrix surface may be equal to the film thickness of the electrodeposition coating. The angle formed with the matrix surface of the minute space 10 is preferably 10 ° or more and 30 ° or less, but it has been found that it may be less than the film thickness.

Positioning and jetting are performed such that the liquid jetted from the jet nozzles 3a and 3b jumps into the gap formed in the minute space 10. As a result, the end face of the electrodeposition coating 2 is pushed up by the liquid water flow, the electrodeposition liquid enters the interface between the electrodeposition coating 2 and the cylindrical metal matrix 1, and the cylindrical metal matrix 1 and the electrodeposition coating 2. A thin release film was formed on the entire surface of the film, making it possible to release the mold, making it easy to release.

5, is provided with a serrated irregular portion 11 on the second end electrodeposition coating on the boundary of the insulating ring 6 and the electrodeposition coating 2 is masking material. When the shape of the end portion of the serrated concavo-conductive析被film releasability from the mother die 2 are conductive析被film 2 in contact with the mold first the first projecting portion is mold and forms an angle β3 And the second angle β4 formed by the second convex portion in contact with the first convex portion. The shape of the concavo-convex portion 11 is such that the first angle β3 formed by the first convex portion in contact with the matrix and the surface of the matrix is 10 ° or more and 40 ° or less, and the thickness of the first projection is 10 μm or more and 40 μm or less. Thus, it is preferable that the second angle β4 formed by the second convex portion in contact with the first convex portion and the first convex portion is 45 ° or more and 90 ° or less.

Positioning and jetting are performed so that the liquid jetted from the jet nozzles 3a and 3b hits the concave and convex portion 11 that satisfies the above-described conditions. As a result, the end face of the electrodeposition coating 2 is pushed up by the liquid water flow, and the liquid enters the interface between the electrodeposition coating 2 and the cylindrical metal matrix 1 to deposit the cylindrical metal matrix 1 and the electrodeposition. A thin release coating was formed on the entire interface with the coating 2 and the mold could be released, making it easy to release.

  When the above conditions are satisfied, the concavo-convex portion is not specially processed, and a grind that can be produced when the insulating ring 6 is manufactured can also be used.

The liquid is sprayed from the spray nozzles 3a and 3b onto the electrodeposited film 2 having the end face shape shown in FIGS. 2 to 6, and at this time, the cylindrical metal matrix 1 is relative to the spray nozzles 3a and 3b. In particular, the jet liquid is efficiently supplied to the interface by rotating at 2 to 10 revolutions. In FIG. 2, the cylindrical metal mother die 1 is rotated by the drive motor 9. However, even if the cylindrical metal mother die 1 is fixed and the injection nozzles 3 a and 3 b are rotated, the cylindrical metal mother die 1 and the injection nozzle are injected. The nozzles 3a and 3b can also be rotated simultaneously.

After forming the release coating, the belt is fixed with a belt clamp 7 having a grip made of an elastic body provided on the outer peripheral surface of the cylindrical metal mother die 1, and the endless belt is pulled out by pulling out the cylindrical metal mother die 1. Is released.

That is, according to the present invention, when the endless belt formed by electroforming on the surface of the cylindrical metal matrix is released from the matrix, the electrodeposition coating 2 cylinder formed on the cylindrical metal matrix 1 is used. matrix by forming an interface release coating between the conductive析被film 2 and the cylindrical metal mold 1 by injecting supplying high-pressure fluid from the end of the interface conductive析被film 2 with Jo metal matrix 1 Is released (hereinafter referred to as the water jet method).

  There are Ni, Ni-Fe, Ni-Fe, Ni-Fe-Co alloy, etc. as the material of the electrodeposition film formed by the electroforming method. For example, iron, an alloy thereof, copper or an alloy thereof, cobalt, or , Alloys thereof, tungsten alloys, and fine particle dispersed metals. As the material of the cylindrical metal mold, iron or its alloy, stainless alloy, aluminum or its alloy, copper or its alloy, tungsten alloy, etc., which have been subjected to surface treatment such as wear resistance and corrosion resistance as needed Use it. For example, for nickel and nickel alloy-based electrodeposited coatings, corrosion resistance and wear resistance can be secured as a matrix by using a stainless alloy material and a hard chrome plated surface. Releasability can also be secured.

  The thickness of the coating is preferably 10 to 200 μm in the form of a belt.

In the above description has been made so as to inject liquid from only one end of the conductive析被film 2, the liquid is provided with a jet nozzle at both ends of the cylindrical metal mold 1, both electrodeposition coating 2 It is also possible to inject simultaneously to the end of the.

In the above description, the number of injection nozzles is two. However, the number of injection nozzles is not particularly limited, and two or more injections are made on the same circumference with respect to the cylindrical metal matrix 1. A nozzle can be formed. In this case, it is preferable to form the injection nozzles at equal intervals.

  The pressure at the time of spraying varies depending on the material and thickness of the electrodeposition film to be released, but if the pressure is too weak, the formation of the release film for releasing becomes insufficient and the effect is small, and if the pressure is too high, the electrodeposition is Since film tearing occurs, it is necessary to adjust the injection pressure in a timely manner, and by optimizing the injection pressure, it becomes possible to deal with release of a film having a wide range of dimensions and materials.

  In the present invention, the cylindrical metal matrix may be in a fixed state, but is preferably rotated continuously or intermittently relative to the nozzle, and the rotation speed is rotating at 2 to 10 rpm. Is preferred. It is preferable that the cylindrical metal matrix is rotated continuously or intermittently with respect to the nozzle because the spray liquid is efficiently supplied from the spray nozzle to the interface with the coating film.

  The high-pressure liquid in the present invention preferably has a surface tension of 20 to 100 mN / m from the viewpoint of permeability to the interface, silicone oil (TSF451-100): 20.9 mN / m, toluene: 28.4 mN / m. Liquids such as mineral oil: 29.7 mN / m, glycerin: 63.1 mN / m, pure water: 72.0 mN / m (20 to 30 mN / m when a small amount of surfactant is mixed) can be used. From the viewpoint of environmental friendliness and easy handling, pure water is preferable. Surfactants mixed in pure water include fatty acid sodium, fatty acid potassium, sodium alphasulfo fatty acid ester sodium, linear alkylbenzene-based linear alkylbenzene sulfonate sodium, etc., higher alcohol-based alkyl sulfate sodium, alkyl ether sulfate sodium , Anionic surfactants such as sodium alpha olefin sulfonate and sodium alkyl sulfonate, sucrose fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, fatty acid alkanolamide, polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether Amphoteric surfactants such as cationic surfactants such as alkylamino fatty acid sodium, alkylbetaine, and alkylamine oxide , And it can be used alkyltrimethylammonium salt, a nonionic surfactant such as dialkyl dimethyl ammonium salts.

  The pressure at the time of spraying varies depending on the material and thickness of the electrodeposition film to be released, but if the pressure is too weak, the formation of the release film for releasing becomes insufficient and the effect is small, and if the pressure is too high, the electrodeposition is Since film tearing occurs, it is necessary to adjust the injection pressure in a timely manner, and by optimizing the injection pressure, it becomes possible to deal with release of a film having a wide range of dimensions and materials.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited only to the embodiment.

Hard chrome plated stainless material surface obtained by facilities and dimensions, using a cylindrical metal mold thus to form an oxide film on the portion of 50mm from both ends in the diameter 24 mm, length 450 mm, electricity to the part of the central 350mm Cast nickel and electroformed nickel-iron alloy were formed. By releasing the electrodeposited film, an endless belt made of an electrodeposited film having a length of 350 mm and an inner diameter of 24 mm can be obtained. The thickness of the electrodeposition belt a thickness of electrodeposition coating.

  In the following examples and comparative examples, in order to define the end face shape of the electrodeposited film, an elastic masking material that can be brought into close contact with the matrix is used.

  As the electrodeposition film, electroformed nickel and electroformed nickel-iron alloy were used. Two types of endless belts were made under the following conditions. The coating characteristics of the produced endless belt were as follows.

<Electroforming conditions of electroformed nickel-iron alloy belt>
Nickel sulfate (140 g / l),
Ferrous sulfate (7 g / l),
Boric acid (30 g / l),
Sodium chloride (25 g / l),
Saccharin sodium (0.3 g / l),
Sodium lauryl sulfate (0.02 g / l)
Bath temperature 40 ° C,
PH 2.75
Current density 1.7 A / dm ²
<Electrocast nickel-iron alloy belt coating characteristics>
Hardness Hv (0.1 kg) 500-600
Tensile strength 1500-2100 MPa
<Electroforming conditions of electroformed nickel belt>
Nickel sulfamate tetrahydrate (450 g / l),
Nickel chloride 10g / l)
Boric acid (40 g / l)
Saccharin (0.05-0.1 g / l),
2-butyne 1,4 diol (0.3-0.5 g / l)
Pit inhibitor, bath temperature 50 ° C,
PH 4
Current density 7A / dm ²
<Characteristics of electroformed nickel belt coating>
Hardness Hv (0.1 kg) 250-400
Tensile strength 800-1200MPa
The conditions of the water jet method used in this example are as follows:
Spray amount 5 L / min (0.3 Mpa) ejection angle α: 65 °, spray nozzle having a fan-shaped spray pattern (manufactured by Ikeuchi), liquid jet pressure 0.8 to 1.6 Mpa, spray nozzle angle 40 °, Mold release was performed under the conditions of an injection distance of 10 mm and a matrix rotation speed of 5 rpm.

(Examples 1-3)
An electroformed nickel coating having a film thickness of 30 μm was formed on the cylindrical metal matrix using a masking material in which the end of the electrodeposition coating was vertical.

  The electroformed nickel coating having a thickness of 30 μm had a shape in which the electroformed end face was substantially perpendicular to the mother die. As a result of releasing by the water jet method without performing the end face peeling treatment, there was some resistance when the discharge pressure from the nozzle was 0.8 Mpa, but release was possible. Moreover, as a result of performing mold release at a discharge pressure of 1.0 Mpa from a nozzle by a water jet method for a case where a part of the electroformed film end face was peeled off before releasing from the mother die and a case where it was not, the end face It was confirmed that the mold could be released without any resistance regardless of the presence or absence of the peeling treatment.

  In the evaluation of releasability, five belts were evaluated for each condition.

(Comparative Examples 1-2)
Similarly to Examples 1 to 3, a 30 μm thick electroformed nickel film was prepared using a masking material with the end of the electrodeposited film being vertical, and the end surface of the electroformed film was released before releasing from the mother die. Some parts were peeled off and some were not peeled off, and the mold was released by dipping treatment with conventional pure water. Those that were not treated had high resistance at the time of mold release and could not be released.

(Examples 4 to 6)
An electroformed nickel-iron alloy with a film thickness of 30 μm was formed using a masking material in which the end of the electrodeposited film was vertical.

  The electroformed nickel-iron alloy coating having a thickness of 30 μm had a shape in which the electroformed end face was substantially perpendicular to the mother die. As a result of releasing by the water jet method without performing the end face peeling treatment, there was some resistance when the discharge pressure from the nozzle was 1.4 MPa, but release was possible. Moreover, as a result of performing mold release at a discharge pressure of 1.6 Mpa from a nozzle by a water jet method for a part of the electroformed film end face that was peeled off from the mother mold before and after the mold release, It was confirmed that the mold could be released without any resistance regardless of the presence or absence of the peeling treatment.

(Comparative Examples 3-4)
Similarly to Examples 4 to 6, an electroformed nickel film having a film thickness of 30 μm was produced using a masking material in which the end of the electrodeposition film was vertical, and the end face of the electroformed film was formed before releasing from the mother die. Some parts were peeled off and some were not peeled off, and the mold was released by dipping treatment with conventional pure water. Those that were not treated had high resistance at the time of mold release and could not be released.

  The electroformed film having a film thickness of 30 μm could be released by the water jet method.

Next, the relationship between the film thickness of the electroformed film having a vertical end face and the releasability was investigated.

(Examples 7 to 12)
Using a masking material in which the edge of the electrodeposition coating is vertical, electrocast nickel and electrocast nickel-iron alloy coatings with a film thickness of 10 μm, 100 μm, and 200 μm are subjected to the water jet method without performing end face peeling treatment. As a result of releasing the mold, it was possible to release the mold without any problem.

(Comparative Examples 5 to 10)
Water jet without end face peeling treatment of electroless nickel and electrocast nickel-iron alloy endless belts with film thickness of 8μm, 210μm and 250μm using a masking material that makes the edge of the electrodeposition film vertical As a result of release by the method, Comparative Examples 5 and 8 having a thin film thickness of Comparative Examples 5 and 8 were partially broken, and Comparative Examples 6, 7, 9 and 10 having a thick film thickness of 210 μm and 250 μm were used. In this case, the resistance was remarkably increased at the time of mold release, and the mold release was difficult.

  In Table 1, the evaluation result of the mold release property of Examples 1-12 and Comparative Examples 1-10 is shown.

  Next, belts having different end face cross-sectional angles and straight part coat heights as shown in FIG. 2 as the cross-sectional shape of the electrodeposited film end face part were produced by changing the masking material end face shape, and the releasability was evaluated.

(Examples 13 to 19)
When producing an electroformed nickel-iron alloy film having a thickness of 30 μm, the shape of the end face part is a cross-sectional angle of 45 ° to 135 ° of the end face part, and the thickness of the straight part of the end face cross-sectional part is 50 of the total film thickness. % Of the belt (17 μm in this embodiment) was subjected to mold release at a discharge pressure of 1.6 Mpa from the nozzle by the water jet method without subjecting the end face peeling process to a cross section angle of 45 ° and 135 °. In Examples 13 and 19 at 0 °, although there was some resistance at the time of mold release, both could be released.

(Comparative Examples 11-14)
When producing an electroformed nickel-iron alloy film having a thickness of 30 μm, the end face shape is such that the cross section angles of the end face portions are 40 ° and 140 °, and the coat height of the straight portion of the end face cross section is the total film thickness. Of the belt having a thickness of 50% or more (17 μm in this comparative example) and a belt having a coating height of the straight portion of the cross section of the end surface of 50% or less (13 μm in this comparative example). As a result of performing mold release at a discharge pressure of 1.6 Mpa from the nozzle by a water jet method without performing a peeling treatment, Comparative Examples 11 and 13 having a cross-sectional angle of 40 ° show the coating height of the straight portion of the cross-sectional portion. Regardless, the releasability was remarkably lowered and the releasability was lowered. Further, in Comparative Examples 12 and 14 having a cross-sectional angle of 140 °, there was a case where a local cracking phenomenon occurred in the coating, and release was impossible.

(Comparative Examples 15-20)
When producing an electroformed nickel-iron alloy coating with a thickness of 30 μm, the end face has a cross section angle of 45 ° to 135 ° (excluding 90 °) as a shape of the end face, and a coating on the straight portion of the end face cross section. The belt having a height of 50% or less of the total coating thickness (13 μm in this comparative example) is subjected to mold release at a discharge pressure of 1.6 Mpa from the nozzle by a water jet method without performing end face peeling treatment. As a result, there was a thing with large resistance at the time of mold release, and the mold release rate fell significantly.

  Table 2 shows the evaluation results of the releasability of Examples 13 to 19 and Comparative Examples 11 to 20.

  Next, the releasability of the electrodeposited film having the end face shape shown in FIGS. 4 and 6 was evaluated as the cross-sectional shape of the end face part of the electrodeposited film.

(Examples 20 to 27)
An electroformed nickel-iron alloy coating film having a thickness of 150 μm having the end face shape shown in FIGS. 4 and 6 was prepared. Sample with the gap height of 20 μm constant and the angle changed to 10, 15, 20 and 30 °, with the depth when the gap height is 20 μm at an angle of 15 ° and the angle is 10, 15, Samples changed to 20 and 30 ° and samples having a shape with an angle of 30 ° and a gap height of a film thickness were prepared, and the mold was released at a discharge pressure of 1.6 Mpa from a nozzle by a water jet method. As a result, it was possible to release the mold.

(Comparative Examples 21 and 22)
An endless belt made of an electroformed nickel-iron alloy with an end face shape of FIGS. 4 and 6 having an end face shape of 150 μm, a gap height of 20 μm, and angles of 8 ° and 35 ° was prepared from a nozzle by a water jet method. As a result of releasing at a discharge pressure of 1.6 Mpa, a local tearing phenomenon of the film occurred when the angle was 8 ° or less, and the release rate was remarkably lowered when the angle was 35 °.

  Table 3 shows the evaluation results of the releasability of Examples 14 to 21 and Comparative Examples 21 and 22.

  Next, the releasability of the electrodeposited film having a sawtooth shape of the end surface shown in FIG. 5 as a cross-sectional shape of the end surface portion of the electrodeposited film was evaluated.

(Examples 28 to 35)
An electroformed nickel-iron alloy coating film having a thickness of 150 μm having the end face shape of FIG. 5 was prepared. An electrodeposited film having a first angle of 10 and 40 °, a height of 10 and 40 μm, and a second angle of 45 and 90 ° was prepared, and the discharge pressure from the nozzle by the water jet method was 1. As a result of release at 6 Mpa, release was possible in all cases.

(Comparative Examples 23-32)
An endless belt made of an electroformed nickel-iron alloy having a thickness of 150 μm having the end face shape of FIG. 5 was prepared. First angle, a result of creating the electrodeposited coating of varying height and a second angle, were releasing at discharge pressure 1.6Mpa from the nozzle by the water jet method,
1. In Comparative Examples 25 and 26 in which the first angle is 45 °, the efficiency of pushing up the film at the time of injection is lowered, and the release rate is greatly reduced.
2. In Comparative Example 23 in which the first angle is 8 °, the thickness is 8 μm, and the second angle is 40 °, shape formation becomes difficult,
3. In Comparative Example 24 in which the first angle was 8 °, the thickness was 45 μm, and the second angle was 100 °, there was a phenomenon in which the coating was partially cracked, and release was impossible.

  Table 4 shows the evaluation results of the releasability of the electrodeposited coatings of Examples 28 to 35 and Comparative Examples 27 to 36 having a sawtooth end face shape.

<Releasability criteria>
○: Completely release without resistance in a predetermined time Δ: Resistance is released in the middle but release is possible ×: Release is not possible and release rate is 30% or less Also from the above results, release using the water jet method of the present invention The method does not require the end face part peeling treatment to facilitate the releasability after conventional electroforming, and has an endless belt made of electroformed nickel and high hardness, which has been difficult to release by conventional methods. It was confirmed that the endless belt could be released from the electroformed nickel-iron alloy, which is not easily elastically deformed.

It is a schematic block diagram which shows an example of the mold release apparatus and mold release method of an endless belt. It is sectional drawing which shows the shape and injection position of an endless belt end surface. It is sectional drawing which shows the state after the end surface peeling process of an endless belt. The figure which showed the other Example of the cross-sectional shape formed by masking. The figure which showed the other Example of the cross-sectional shape formed by masking. The figure which showed the other Example of the cross-sectional shape formed by masking.

Explanation of symbols

100 Mold release device 1 Master mold 2 Endless belt (Electrodeposition coating)
2a Electrodeposition cross section 3a, 3b Injection nozzle 4 Master fixture 5 Master holder 6 Insulating ring 7 Belt lamp 8 Belt clamp support 9 Drive motor 10 Air gap 11 Concavity and convexity α Injection angle β1, β2 Electron Section angle L of deposited film end face portion Distance between nozzle and end face β3, β4 Section angle h of electrodeposited film end face uneven portion Thickness of first convex portion

Claims (14)

It is formed on the side surface of the cylindrical metal master mold, the by ejecting liquid interface portion between the cylindrical metal matrix electrodeposition coating the end face of the at least one end is exposed on a side surface of the cylindrical metal base electrocoating A method for releasing an endless belt, wherein the deposited film is released from the cylindrical metal matrix.   The electrodeposited film has end faces exposed at both ends of the side surface of the cylindrical metal matrix, and the interface between the electrodeposited film and the cylindrical metal matrix on both exposed end faces of the electrodeposited film 2. The method for releasing an endless belt according to claim 1, wherein a liquid is jetted onto the endless belt.   The method of releasing an endless belt according to claim 1, wherein the liquid is ejected from an ejection nozzle.   The endless belt mold release method according to claim 3, wherein the cylindrical metal matrix is rotated relative to the injection nozzle. The method for releasing the endless belt according to claim 3, wherein the surface tension of the liquid supplied to the interface between the cylindrical metal matrix and the electrodeposition coating is 100 mN / m or less. The end surface of the cylindrical metal mold to form the conductive析被film without the cylindrical metal mold perpendicular angle, thickness from the cylindrical metal matrix surface of the electrodeposition coating, 200 [mu] m or more 10μm The method for releasing an endless belt according to any one of claims 1 to 5, wherein: The cross-sectional shape of the end surface portion of the electrodeposited film formed on the cylindrical metal matrix is
The conductive析被film, more than 50% of the total film thickness from the cylindrical metal mold surface forms the vertical angle with respect to the cylindrical metal matrix surface,
6. The method for releasing an endless belt according to claim 1, wherein the inclination angle is 45 ° or more and 135 ° or less with respect to the cylindrical metal mold surface. End of the electrodeposition coating film formed on the cylindrical metal matrix is, the cylindrical metal mold and without a normal angle, and cross-sectional shape of the end portion of the conductive析被film of said electrodeposition coating 6. The gap according to claim 1, wherein an angle formed by the cylindrical metal matrix surface and the thickness direction of the electrodeposition coating has a gap of 10 ° or more and 30 ° or less. Endless belt release method. The cylindrical metal matrix surface of the first convex portion in contact with the cylindrical metal matrix surface is a serrated irregular shape in an end surface section of the electrodeposition coating formed on the cylindrical metal matrix. The first angle formed with the thickness direction of the electrodeposited film is 10 ° or more and 40 ° or less, and the electrodeposited film of the first convex portion forming the first angle from the cylindrical metal matrix surface of the electrodeposited film. The thickness is 10 μm or more and 40 μm or less, and the second angle formed between the second protrusion formed in contact with the first protrusion and the first protrusion is 45 ° or more and 90 ° or less. The method for releasing an endless belt according to any one of claims 1 to 5, wherein: The shape of the end face portion is a shape obtained by transferring the shape of an insulating ring disposed on the cylindrical metal matrix when depositing the electrodeposited film. A method for releasing the endless belt according to claim 1. A mold release apparatus for releasing an endless belt from the surface of the mother mold after forming an endless belt by subjecting the mother mold to electroforming and depositing an electrodeposited film,
An endless belt mold release device, characterized in that a means for discharging liquid is provided at an interface between the mother die and the endless belt, which is disposed on an end surface portion of the endless belt.   12. The mold release apparatus for an endless belt according to claim 11, further comprising means for rotating the means for rotating the master mold and / or the means for discharging the liquid.   12. The endless belt mold release device according to claim 11, wherein the means for discharging the liquid is provided at least at one end of the matrix.   The device for releasing an endless belt according to claim 11, wherein means for discharging the liquid is provided at both ends of the mother die.

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