JP2002234651A - Manufacturing method for resin-covered roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems in a conventional manufacturing method for a resin-covered roller that a process for making a resin surface flat and smooth in cutting machining is required after a process for covering a roller with resin and it is covered with resin in a process for manufacturing the resin-covered roller having a support part, the support part must be machined and manufactured after covering when it is covered with resin by extrusion molding, and much time and cost are required to manufacture the resin-covered roller in order to provide a manufacturing method for the resin-covered roller capable of shortening manufacturing time and reducing manufacturing cost. SOLUTION: In this manufacturing method for the resin-covered roller, a plurality of roller members consisting of a roller base material and a roller support bar are connected by a cylindrical tube in the axial direction to form a connected body of the roller members, and the tube covered with resin is removed from the connected roller member covered with resin after covering outer periphery of the connected roller member with resin by extrusion molding to separate the roller member covered with resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a thin-film resin-coated roller used for a cleaning roller or a backup roller for a copying machine and a printer, and to a connecting member and a connecting structure used therefor.

[0002]

2. Description of the Related Art Generally, a copying process or a printing process in which toner applied to a conventional toner cartridge is supplied to a photoreceptor having an electrostatic latent image formed thereon and transferred and fixed on paper is generally charged, exposed (exposed). ), Development, transfer / separation, and fixing and cleaning (including static elimination). These mechanisms include a charging roller,
A transfer roller, a cleaning roller, a backup roller, and the like are used.

If a trouble occurs during the transfer process in a copying machine or a printer having the above mechanism, toner may adhere to the transfer roller, and a cleaning roller is disposed adjacent to the transfer roller to remove the toner from the transfer roller. Have been. Further, a backup roller is disposed adjacent to the cleaning roller to remove toner from the cleaning roller.

The above-described cleaning roller or backup roller has a structure in which a resin is coated on the outer periphery of a metal roller base material. This resin-coated roller is made by coating the outer periphery of a metal roller base material with a resin.If the surface is smooth, the coating thickness does not need to be particularly specified. Thin film (coating thickness: 100-500 μm) in consideration of reduction and smoothness of resin surface
It has a resin coating structure.

[0005] As a manufacturing method for manufacturing a resin-coated roller (hereinafter also referred to as a roller) having such a thin-film resin-coated structure, a separately manufactured tube-shaped resin is placed on a metal roller base material, heat-shrinked and adhered. How to make
A method in which a separately manufactured sheet-shaped resin is wound around a metal rod to be thermally shrunk and adhered, and a method in which a resin is poured into a gap formed between the metal mold and a metal roller base material using a metal mold. There is a so-called injection molding method. In the production methods of (1) and (2), each metal roller base material must be covered with a tube or sheet-like resin or wound and further heated, so that the production efficiency becomes complicated. In the injection molding method, it is difficult to coat the resin of the thin film with the resin on the outer periphery of the roller base material smoothly. After coating, it is necessary to perform a cutting process to smooth the resin surface. In addition, there were problems that the production cost was high.

Further, as a method for coating the outer periphery of a metal rod with a resin more easily than the above-mentioned method, there is a resin coating method by extrusion molding. In this method, for example, a metal rod is continuously charged into an extruder, and a resin is coated on the outer periphery of the metal rod by extrusion molding. At this time, the length of the metal rod fed into the extruder is about 2000 mm, and the metal rod coated with the resin by extrusion molding has a predetermined length (2 mm).
(00 mm to 400 mm) to produce a roller. Rollers made by this method are applicable where end processing is not required, but the ends of the rollers used in copiers or printers are processed to support the rollers (ends of metal rods). It is necessary to reduce the outer diameter by cutting the part). Therefore, a metal rod is continuously put into the extruder as described above, the resin is coated on the outer periphery of the metal rod by extrusion molding, and the roller formed by cutting into a predetermined length is further cut. Although a process of forming an end portion is required and simple and good resin coating can be performed, it is not suitable as a method of manufacturing a resin-coated roller requiring a support portion because it has a cutting process in a later process.

[0007]

As described above, in the conventional manufacturing method, the resin is coated in the step of manufacturing the resin-coated roller having the support portion, or the resin surface is smoothed by cutting after the resin is coated. Is required.
Further, when the resin is coated by extrusion molding, it is necessary to process and manufacture the support after coating, and it takes time and cost to manufacture the resin-coated roller. Accordingly, an object of the present invention is to provide a method of manufacturing a resin-coated roller that can reduce the manufacturing time and the manufacturing cost.

[0008]

SUMMARY OF THE INVENTION The present invention is directed to the manufacture of a resin-coated roller having a support portion which can reduce the manufacturing time and the manufacturing cost, particularly a resin-coated roller having a support portion used for a copying machine or a printer. It provides a method.

That is, a roller member composed of a roller base material and a roller support rod is connected to a plurality of roller members by a cylindrical tube in the axial direction to form a connected member of the roller members. Manufacturing a resin-coated roller, wherein the resin-coated tube is removed from the resin-coated connecting roller member after the resin is coated by extrusion molding, and the resin-coated roller member is separated. Solved in a way.

The material of the roller substrate is not particularly limited as long as it is made of metal, but preferably iron or stainless steel in terms of hardness and cost. There is no problem if the shape is a columnar shape or a rod shape having a circular cross section.
400 mm is desirable.

The material of the roller supporting rod is not particularly limited as long as it is made of metal, but preferably iron or stainless steel in terms of hardness and cost. The shape is a column shape or a rod shape having a circular cross section, and there is no problem as long as it is smaller than the outer diameter of the roller base material described above.

As the roller member, a member assembled from the above-described roller substrate and the roller supporting rod, or a member having a roller supporting portion formed by cutting an end portion of the roller substrate is applied.

It is not necessary to specify the material of the cylindrical tube for connecting the roller members in the axial direction, but any material may be used as long as it does not deform, burn or deteriorate at the extrusion molding temperature of the resin to be coated. , Ceramics, heat-resistant plastics, etc., and preferably stainless steel or iron, which is the same material as the roller member. The outer diameter and the hole diameter of the tube are not particularly limited, but the outer diameter of the tube is preferably the same as or smaller than the maximum outer diameter of the roller member, and the hole diameter of the tube is preferably the same as the roller support rod.

The method of connection is not particularly limited as long as it is connected in the axial direction and the resin is coated on the roller base material, but the roller support rod is preferably connected to the hole of the tube. The method of inserting a part of the roller support rod into the hole of the tube is more preferable. When the resin is coated with the resin in this connected state, the resin wraps around the end of the roller base material, so that the resin of the completed resin-coated roller does not shift.

It is not necessary to limit the number of roller members to be connected, and it is sufficient that the number of the roller members is such that work efficiency is high and storage and handling are easy.

As the extrusion molding, known methods such as a pressure method and a tubing method are applied, but it is preferable to extrude by a tubing method which can easily obtain a uniform coating.

The resin to be coated may be any resin having an insulating property and a strength as a roller, for example, polyethylene, polypropylene, polystyrene, polyamide (nylon), acrylonitrile butadiene styrene, PPE polyphenylene. Ether, polycarbonate, polybutylene terephthalate, etc. are applied, and it is particularly preferable to use nylon having good chargeability. The coating thickness is not particularly limited, but the coating material is reduced and the production time is shortened ( The preferable resin thickness for cooling (hardening) time in the post-process is 0.05 mm to 1.0 mm.
mm is appropriate. Extrusion speed is 0.5m / min to 10m
/ Min is preferred. When the speed is lower than 0.5 m / min, the production efficiency is low, and when the speed is higher than 10 m / min, the distance for cooling (for curing the resin) needs to be long, which is not preferable.

After the extrusion molding, a step of cooling the roller assembly may be provided. As a cooling method, air cooling or water cooling is applied. As the air cooling, a method of blowing air, a method of naturally cooling by exposing to air as it is, or the like is applied. Examples of the water cooling include a method of cooling by immersing in a water tank and a method of cooling by applying water.

As a method for removing the tube from the connecting roller member coated with the resin, there is a method in which a cut is made in the resin coated with a cutter or knife blade at the end of the tube to separate the tube.

[0020]

According to the present invention, a plurality of roller base materials are continuously formed by connecting a roller member composed of a roller base material and a roller support rod with a cylindrical tube in the axial direction to form a connected member of the roller members. Can be coated with a resin. Also, since the resin is not coated because there is a tube on the outer periphery of the roller support rod, there is no need for a step after removing the tube from the continuous body, thereby shortening the manufacturing time and reducing the manufacturing cost. An object of the present invention is to provide a method for producing a resin-coated roller having a support portion that can be used, particularly a resin-coated roller having a support portion used for a copying machine or a printer.

Further, by connecting a part of the roller support rods with a tube, a special effect is obtained in that the resin flows around the end of the roller base material and the coated resin does not shift.

[0022]

1 and 3 show an embodiment of the present invention.
I will explain using. FIG. 1 (a) A roller member 3 composed of a roller support rod 1 and a roller substrate 2 and a plurality of tubes 4 arranged in the axial direction between the roller members. Figure 1
(B) The roller support rods are all inserted into the holes of the tube and connected to form a connected roller member A. Figure 1
(C) A resin (for example, polyethylene, polypropylene, polystyrene, polyamide (nylon), acrylonitrile butadiene styrene, polyphenylene ether, polycarbonate, polybutylene terephthalate) is formed on the outer periphery of the connecting roller member A by extrusion such as tubing or pressing. Tate) 5 is coated. Then, the end of the tube 4 is cut with a cutter to remove the tube from the connecting roller member A and separate the connecting roller member A to obtain the resin-coated roller shown in FIG.

FIG. 3A shows a roller member 3 composed of a roller support rod 1 and a roller substrate 2, and a plurality of tubes 4 arranged in the axial direction between the roller members. FIG. 3 (b) A roller support rod is partially inserted into the hole of the tube and connected to form a connected roller member B. FIG. 3 (c) A resin (for example, polyethylene, polypropylene, polystyrene, polyamide (nylon), acrylonitrile-butadiene-styrene, polyphenylene ether, polycarbonate, polybutylene) is formed on the outer periphery of the connecting roller member B by extrusion such as tubing or pressing. (Terephthalate) 5. Thereafter, a cut is made in the concave portion of the tube 4 with a cutter, and the tube is removed from the connecting roller member B to separate the connecting roller member B to obtain the resin-coated roller shown in FIG.

[0024]

Embodiment 1 FIG. 1 is a longitudinal sectional view showing an example of a manufacturing process of the resin-coated roller of the present invention. (B) Roller support 1 of φ3mm made of stainless steel and φ
A roller member 3 made of a 5 mm stainless steel roller base material 2 is axially connected by a cylindrical stainless steel tube 4 having a hole diameter of φ3 mm and an outer diameter of φ5 mm to produce a continuum A of the roller member 3. I do. At this time, tube 4
Inserts the entire roller support 1. (B) The outer periphery of the above continuous body is coated with nylon 5 at a coating thickness of 0.5 mm by a tubing method (line speed: 1.0 m / min), which is one of the extrusion methods, and the nylon 5 is air-cooled.
To cure. (C) After the nylon 5 has hardened, a cut is made from the end of each tube 4 with a cutter, and the tube 4 and the roller member 3 are cut off. FIG. 2 shows a longitudinal sectional view of the resin-coated roller manufactured by the manufacturing method of the first embodiment.

Embodiment 2 FIG. 3 is a longitudinal sectional view showing an example of a production process of the resin-coated roller of the present invention. (B) Roller support 1 of φ3mm made of stainless steel and φ
A roller member 3 composed of a 5 mm stainless steel roller base material 2 is connected in the axial direction with a cylindrical stainless steel tube 4 having a hole diameter of φ3 mm and an outer diameter of φ5 mm to produce a continuum B of the roller member 3. I do. At this time, tube 4
Inserts only a part of the roller support 1. (B) The outer periphery of the above continuous body is coated with nylon 5 at a coating thickness of 0.5 mm by a tubing method (line speed: 1.0 m / min), which is one of the extrusion methods, and the nylon 5 is air-cooled.
To cure. (C) After the nylon 5 has hardened, the tube 4 and the roller member 3 are cut off from the recesses formed by the cutter with a cutter. FIG. 4 is a longitudinal sectional view of the resin-coated roller manufactured by the manufacturing method of the second embodiment in FIG.

[0026]

According to the method of manufacturing a resin-coated roller of the present invention, even a roller member having a supporting portion can be manufactured by extrusion, so that a thin-film resin can be uniformly coated and a large amount can be formed in a short time. Can be produced in
Production costs can be reduced. Further, depending on the degree of insertion of the tube, the coating resin can be wrapped around the roller base material, so that there is an effect that the coated resin does not shift.

[Brief description of the drawings]

FIG. 1 shows an example of the production method of the present invention.

FIG. 2 shows a longitudinal sectional view of a resin-coated roller formed by the production method of the present invention.

FIG. 3 shows an example of the production method of the present invention.

FIG. 4 shows a longitudinal sectional view of a resin-coated roller formed by the production method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roller support rod 2 Roller base material 3 Roller member 4 Tube 5 Nylon 6 Resin-coated roller A Connecting roller member B Connecting roller member

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshiji Miyashita 8 Nishinocho, Higashimukaijima, Amagasaki City, Hyogo Prefecture F-term (reference) 3F104 AA02 JA01 JA03 JA04 JB01 JB05 JC07 JC08 4F207 AD03 AD18 AD35 AG08 AH04 AJ02 KA01 KA17 KB18 KB20

Claims (2)

[Claims] A roller member comprising a roller substrate and a roller support rod is connected to a plurality of roller members by a cylindrical tube in an axial direction to form a connected member of the roller members.
After the resin is coated on the outer periphery of the connecting roller member by extrusion molding, the resin-coated tube is removed from the resin-coated connecting roller member, and the resin-coated roller member is separated. A method for producing a resin-coated roller. 2. The method for producing a resin-coated roller according to claim 1, wherein in a state where the roller members are connected by the cylindrical tube, a part of the roller support rods is connected by the tube.