JP6343023B2 - Internal compression method of sponge roller - Google Patents

Description

  The present invention relates to an internal compression method for a sponge roller.

  In an electronic image system such as a printer device, a copy device, or a fax device, it is necessary to use a toner supply roller that supplies toner, a cleaning roller that cleans parts, and a transport roller that transports paper. These rollers are called OA sponge rollers. In order to improve the performance parameters of the OA sponge roller, it is necessary to process the sponge roller. Currently processing sponge sponge improves performance parameters such as sponge roller density, hardness, surface roughness, rebound resilience, permanent deformation, coefficient of friction and improves conventional performance of sponge roller. Can meet the usage requirements.

  A conventional method for treating a sponge roller includes surface heat treatment, surface spraying treatment, and overall compression treatment. In the surface heat treatment method, after putting the sponge roller in the rigid tube, heat treatment is performed on the surface of the sponge roller by heating the rigid tube, or after fixing the sponge roller to the fixing device, One or a plurality of surface-treatable cylinders and a sponge roller to be treated are rotated simultaneously, or one of the two is rotated to heat-treat the surface of the sponge roller. In the surface spraying process, after the paint is sprayed uniformly on the surface of the sponge roller with the spraying device, the paint is fixed to the surface of the sponge roller by placing it in the natural environment or heating it in an oven. . In the whole compression process, after a sponge roller having an outer diameter larger than the inner diameter of the tube is put in the tube, these are put in an oven and heated. The entire sponge roller is compressed by long-time high-temperature heating and compression of the tube against the sponge roller.

  In the surface heat treatment method, by performing the surface heat treatment of the sponge roller, a thin molten layer is formed on the surface sponge of the roller. Parameters such as the hardness, density and surface roughness of the sponge roller can be improved by the melted layer and the deformed layer on the surface. However, there is a risk that the foamed hole of the sponge surface of the sponge roller will become smaller or clogged due to the dissolved layer and deformed layer on the surface. When it is necessary to use the function of the foam hole on the surface of the sponge roller, such as an OA toner supply roller that conveys toner through the foam hole of the sponge roller surface, the sponge roller may be adversely affected by the above-mentioned problems. There is. The same problem may occur when surface spraying is performed on the sponge roller. When the paint is sprayed onto the surface of the sponge roller, the paint may enter the foaming hole of the sponge roller and clog the foaming hole. This also improves the other parameters of the sponge roller, but worsens the passage of foam holes on the surface of the sponge roller. Even when the entire sponge roller is compressed, there is a problem that the foam holes of the surface sponge of the roller are clogged. Moreover, although the hardness and density of a sponge roller can be improved by compressing the whole sponge roller, there exists a possibility that the muscle of a sponge may be cut | disconnected by long-time high temperature compression, and the elasticity of a sponge roller may fall.

  As described above, with the conventional sponge roller processing method, the performance of the sponge roller can be improved, but there is a problem that the foaming holes of the sponge roller's surface sponge become smaller or clogged, which affects subsequent applications. .

  Therefore, there is a need for an internal compression method of the sponge roller that can prevent the foam holes of the surface sponge of the sponge roller from becoming smaller or clogged.

The internal compression method of the sponge roller of the present invention is:
Providing a sponge roller to be treated, the sponge roller comprising a rigid heat transfer shaft and a sponge cover covering the rigid heat transfer shaft;
Providing a mold, wherein a cavity capable of accommodating the sponge cover is formed in the mold, and an inner diameter of the mold cavity is smaller than an outer diameter of the sponge cover;
Heating the rigid heat conducting shaft to 100 ° C. to 350 ° C., and then inserting the sponge roller into the mold cavity, cooling the rigid heat conducting shaft, and then removing the sponge roller.

  In the internal compression method of the sponge roller, when the rigid heat conducting shaft is heated, the heat of the rigid heat conducting shaft is conducted in the radial direction of the rigid heat conducting shaft, so that the sponge closest to the rigid heat conducting shaft is dissolved and deformed first. . Further, by compressing the sponge cover into the mold, the sponge cover whose inside is dissolved and deformed is compressed and fused, the density of the sponge inside the sponge cover is increased, and the hardness is improved. Also, by heating the rigid heat-conducting shaft from 100 ° C to 350 ° C by control, the sponge inside the sponge cover was compressed, but the sponge on the outer surface of the sponge cover did not change, and foaming on the outer surface of the sponge cover The hole is maintained as a foam hole before compression.

It is a flowchart which shows the internal compression method of the sponge roller which concerns on one Example of this invention. It is a figure which shows the structure of the sponge roller which concerns on one Example of this invention. It is a figure which shows the structure of the metal mold | die which concerns on one Example of this invention. It is a figure which shows that the sponge roller of FIG. 2 enters in the metal mold | die of FIG. 3, and the inside is compressed.

  Hereinafter, the internal compression method of the sponge roller will be described in more detail with reference to the drawings of the present invention and specific examples.

  FIG. 1 is a flowchart showing an internal compression method of a sponge roller according to the present invention, and the method includes the following steps.

  In step S10, a sponge roller to be processed is provided.

  Referring to FIG. 2, the sponge roller includes a rigid heat conducting shaft 10 and a sponge cover 20 that covers the rigid heat conducting shaft 10.

  A heat conductive rigid material may be selected as the material of the rigid heat conducting shaft 10. Specifically, at least one of iron, copper, aluminum, and nickel is selected as the material for the rigid heat transfer shaft 10. The material of the rigid heat transfer shaft 10 may be another type of composite material.

  The material of the sponge cover 20 is polyester, polyether, or melamine (MLM). For example, PU (polyurethane), EVA (poval), MLM (melamine) and the like.

  In this embodiment, the sponge cover 20 is a cylindrical body.

  As shown in FIG. 2, in this embodiment, the sponge cover 20 is shorter than the rigid heat conducting shaft 10, and the sponge cover 20 covers the central portion of the rigid heat conducting shaft 10.

  In step S20, the mold 30 is provided.

  Referring to FIG. 3, a cavity that can accommodate the sponge cover 20 is formed in the mold 30, and the inner diameter of the cavity of the mold 30 is smaller than the outer diameter of the sponge cover 20.

  Specifically, the inner diameter of the cavity of the mold 30 can be adjusted according to the type of the sponge cover 20 and the compression request, and the outer diameter of the sponge cover 20 can also be adjusted.

  In this embodiment, the inner diameter of the cavity of the mold 30 is 0.5 mm to 4.5 mm smaller than the outer diameter of the sponge cover 20.

  In the present embodiment, the cavity of the mold 30 is cylindrical.

  As shown in FIG. 2, the mold 30 of this embodiment includes a first mold 32 and a second mold 34. A first arc-shaped tank is formed on the first mold 32, and a second arc-shaped tank is formed on the second mold 34. When the mold 30 is formed by the combination of the first mold 32 and the second mold 34, the cavity of the mold 30 is formed by the first arc-shaped tank and the second arc-shaped tank.

  In the present embodiment, the shape of the first mold 32 and the shape of the second mold 34 match.

  In step S30, after heating the rigid heat conducting shaft 10 to 100 ° C. to 350 ° C., the sponge roller is put into the cavity of the mold 30 and the rigid heat conducting shaft 10 is cooled, and then the sponge roller is taken out.

  In the present invention, the heating method of the rigid heat conducting shaft 10 is not limited. As a heating method, a non-contact heating method such as microwave or infrared, an electric heating method for direct heating, or the like can be adopted.

  In this embodiment, the heating temperature of the rigid heat conducting shaft 10 is 180 ° C., 200 ° C., and 240 ° C.

  When the rigid heat conducting shaft 10 is heated from 100 ° C. to 350 ° C., the heating speed of the rigid heat conducting shaft 10 is 60 ° C./s to 100 ° C./s, and the rigid heat conducting shaft 10 is heated to 100 ° C. to 350 ° C. It takes 1.5 s to 5 s.

  When the rigid heat conducting shaft 10 is heated, the heat on the rigid heat conducting shaft 10 is conducted in the radial direction of the rigid heat conducting shaft 10. Therefore, in the sponge cover 20 covering the rigid heat conducting shaft 10, the sponge closest to the rigid heat conducting shaft 10 is dissolved and deformed earliest. Further, since the sponge cover 20 is compressed by the mold 30, the melted and deformed inside of the sponge cover 20 is compressed and fused, the density of the sponge inside the sponge cover 20 is increased, and the hardness is improved.

  Since many foam holes are formed in the sponge, the heat conductivity coefficient of the sponge is small and the heat conductivity of the sponge is poor. Accordingly, only the sponge in the vicinity of the rigid heat conducting shaft 10, that is, the sponge within a predetermined distance from the rigid heat conducting shaft 10, is melted and compressed by heating, and the heat conductivity is gradually reduced along the radial direction of the rigid heat conducting shaft. The deformation rate of the sponge inside 20 gradually decreases from the inside toward the outside.

  When the rigid heat transfer shaft 10 is heated to 100 ° C. to 350 ° C., the sponge inside the sponge cover 20 is compressed, but the sponge on the outer surface of the sponge cover 20 does not change. That is, the foam hole on the outer surface of the sponge cover 20 remains the same as before the compression. By compressing the inside of the sponge cover 20, parameters such as the density, hardness, and resilience of the sponge roller can be improved. Further, when the meshing area is the same, the meshing strength of the sponge roller whose inside is compressed becomes larger than that of the uncompressed one.

  Specific examples will be described below.

  Table 1 lists the parameters of Examples 1 to 6 and the acquired sponge roller sponge cover compression amount.

  As shown in Table 1, in Examples 1 to 6, a specific inner diameter of the cavity of the mold is selected according to the outer diameter of the sponge cover and the actual demand. In addition, by controlling the heating temperature and heating time of the rigid heat transfer shaft, the sponge on the outer surface of the sponge cover is not deformed in the sponge roller whose inside is compressed, and the foam hole on the outer surface is the same as the foam hole before compression. Maintained.

  Although the preferred embodiments of the present invention have been described specifically and in detail by the above-described embodiments, the configuration of the present invention is not limited to the above-described embodiments. Those skilled in the art can perform design conversion and the like within a scope not departing from the gist of the present invention, and even such design conversion and the like belong to the technical scope of the present invention. is there. In other words, the protection scope of the present invention is based on the scope of the claims.

Claims (15)

An internal compression method of a sponge roller,
Providing a sponge roller to be treated, the sponge roller comprising a rigid heat transfer shaft and a sponge cover covering the rigid heat transfer shaft;
Providing a mold, wherein a cavity capable of accommodating the sponge cover is formed in the mold, and an inner diameter of the mold cavity is smaller than an outer diameter of the sponge cover;
A method for internally compressing a sponge roller, comprising: heating the rigid heat conducting shaft to 100 ° C. to 350 ° C., and then inserting the sponge roller into a cavity of the mold, cooling the rigid heat conducting shaft, and taking out the sponge roller. .   The internal compression method for a sponge roller according to claim 1, wherein at least one of iron, copper, aluminum, and nickel is selected as a material for the rigid heat transfer shaft.   2. The sponge roller internal compression method according to claim 1, wherein the sponge cover material is polyester, polyether or melamine.   2. The sponge roller internal compression method according to claim 1, wherein a material of the sponge cover is polyurethane or poval.   2. The internal compression of the sponge roller according to claim 1, wherein in the step of heating the rigid heat conducting shaft to 100 ° C. to 350 ° C., a heating temperature of the rigid heat conducting shaft is 180 ° C., 200 ° C. or 240 ° C. 3. Method.   2. The sponge roller according to claim 1, wherein in the step of heating the rigid heat conducting shaft to 100 ° C. to 350 ° C., a speed of heating the rigid heat conducting shaft is 60 ° C./s to 100 ° C./s. Internal compression method.   The time for heating the rigid heat-conducting shaft from 100 ° C to 350 ° C in the step of heating the rigid heat-conducting shaft to 100 ° C to 350 ° C is 1.5 s to 5 s. The internal compression method of the sponge roller as described.   The heating time of the rigid heat conducting shaft from 100 ° C to 350 ° C in the step of heating the rigid heat conducting shaft from 100 ° C to 350 ° C is 1.5 s to 5 s. The internal compression method of the sponge roller as described.   2. The sponge roller internal compression method according to claim 1, wherein the sponge cover is a cylindrical body.   The method of claim 9, wherein the mold cavity has a cylindrical shape.   11. The sponge roller internal compression method according to claim 10, wherein an inner diameter of the cavity of the mold is 0.5 mm to 4.5 mm smaller than an outer diameter of the sponge cover.   The mold includes a first mold and a second mold, the first mold is formed with a first arc-shaped tank, the second mold is formed with a second arc-shaped tank, When the mold is formed by a combination of the first mold and the second mold, a cavity of the mold is formed by the first arc-shaped tank and the second arc-shaped tank. The internal compression method of a sponge roller according to claim 10, wherein   The method of internal compression of a sponge roller according to claim 12, wherein the shape of the first mold and the shape of the second mold coincide with each other.   The mold includes a first mold and a second mold, the first mold is formed with a first arc-shaped tank, the second mold is formed with a second arc-shaped tank, When the mold is formed by a combination of the first mold and the second mold, a cavity of the mold is formed by the first arc-shaped tank and the second arc-shaped tank. The internal compression method of the sponge roller according to claim 1, wherein   The method for internal compression of a sponge roller according to claim 14, wherein the shape of the first mold and the shape of the second mold coincide with each other.