WO2017156724A1 - Method for internally compressing sponge roller - Google Patents

Abstract

Provided is a method for internally compressing a sponge roller, the method comprising the following steps of: providing a sponge roller to be treated, the sponge roller comprising a rigid heat conduction shaft (10) and a sponge sleeve (20) sleeved on the rigid heat conduction shaft (10); providing a mould (30), an inner cavity for accommodating the sponge sleeve (20) being formed inside the mould (30), and the inner diameter of the inner cavity of the mould (30) being smaller than the outer diameter of the sponge sleeve (20); and heating the rigid heat conduction shaft (10) to a temperature of 100ºC - 350ºC, placing the sponge roller into the inner cavity of the mould (30) and then withdrawing the sponge roller after the rigid heat conduction shaft (10) is cool.

Description

Internal compression method of sponge roller

[Technical Field]

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

【Background technique】

In a system such as a printer, a copying machine, or a facsimile electronic image forming apparatus, a powder feeding roller for supplying toner, a cleaning roller for cleaning components, and a conveying roller for conveying action are collectively referred to as a sponge roller for OA. In order to improve the performance parameters of the sponge roller for OA, it is necessary to process the sponge roller. At present, the processing of sponge rolls mainly improves the performance parameters such as density, hardness, surface finish, anti-elasticity, permanent deformation and friction coefficient of the sponge roller, and improves the original performance of the sponge roller to meet the work requirements.

Conventional sponge roll processing techniques include surface heat treatment, surface spray treatment, and overall full compression. Surface heat treatment technology: the sponge roller is assembled into a rigid sleeve, and the surface of the sponge roller is heat-treated by heating the rigid sleeve; or the sponge roller is held by the holding device, and then the surface treatment can be performed by single or multiple The cylinder is heat treated by rotating the surface of the sponge roller simultaneously with the roll to be treated or in a single rotation. Surface spray treatment: The paint is evenly sprayed onto the surface of the sponge roll by a spraying device, and then the paint is condensed and adhered to the surface of the sponge roll by natural placement or baking in an oven. Overall full compression treatment: the sponge roller with outer diameter larger than the inner diameter of the sleeve is assembled into the sleeve, placed in the oven for baking, and subjected to long-time high-temperature baking and sleeve to squeeze the sponge roller to make the sponge roller as a whole. Both are compressed.

In the surface heat treatment technology, after the surface heat treatment of the sponge roll, the surface sponge of the roll forms a thin molten layer, and the molten layer and the deformed layer on the surface improve the hardness, density and smoothness of the sponge roll, but the molten layer and the deformed layer The foaming hole of the surface sponge of the roller becomes small or even clogged, and the sponge roller type which is similar to the foaming hole of the surface of the sponge roller is used for the powder feeding roller such as the OA powder feeding roller to be used for the foaming hole of the roller surface sponge. Adverse. The surface-sprayed sponge roller also faces the above problems. When the surface of the sponge roller is sprayed with paint, the coating will enter the foaming hole of the sponge, causing the foaming hole to be blocked. Also, in order to improve the other parameters of the sponge roller, the sponge is sacrificed. The patency of the cells on the surface of the roll. The overall fully compressed sponge roller also faces the problem that the foam foam hole on the roller surface is blocked. In addition, after the sponge is fully compressed, although the hardness and density of the sponge roller are improved, long-term high-temperature compression will cause The ribs of the sponge are broken, so that the elasticity of the sponge roller is lowered.

That is to say, the conventional sponge roller treatment technology can make the foaming pores of the surface sponge of the sponge roller smaller and block the performance while improving the performance of the sponge roller, which is disadvantageous for subsequent applications.

[Summary of the Invention]

Based on this, it is necessary to provide an internal compression method of a sponge roll which does not cause clogging of the foaming holes of the surface sponge of the sponge roll.

An internal compression method for a sponge roller, comprising the following steps:

Providing a sponge roller to be treated, the sponge roller comprising a rigid heat conducting shaft and a sponge sleeve sleeved on the rigid heat conducting shaft;

Providing a mold in which an inner cavity accommodating the sponge sleeve is formed, an inner diameter of the inner cavity of the mold being smaller than an outer diameter of the sponge sleeve;

The rigid heat conducting shaft is heated to 100 ° C ~ 350 ° C, and the sponge roller is placed in the inner cavity of the mold, and the sponge roller is taken out after the rigid heat conducting shaft is cooled.

The internal compression method of the above sponge roller heats the rigid heat conduction shaft, and the heat on the rigid heat conduction shaft is longitudinally transmitted longitudinally. The sponge closest to the rigid heat conduction shaft is first melted and deformed by heat, and the mold is pressed against the sponge sleeve to melt internally. The deformed sponge sleeve is squeezed and fused, so that the density of the sponge inside the sponge sleeve becomes larger and the hardness is improved. By controlling the rigid heat-conductive shaft to be heated to 100 ° C ~ 350 ° C, the sponge on the outer surface of the inner compressed sponge sleeve is not deformed, and the foaming hole of the surface sponge remains consistent with that before compression.

[Description of the Drawings]

1 is a flow chart showing an internal compression method of a sponge roll of an embodiment;

2 is a schematic structural view of a sponge roller according to an embodiment;

3 is a schematic structural view of a mold of an embodiment;

Figure 4 is a schematic illustration of the internal compression of the sponge roll as shown in Figure 2 in a mold as shown in Figure 3.

 【detailed description】

The internal compression method of the sponge roller will be further described in detail below mainly with reference to the accompanying drawings and specific embodiments.

The internal compression method of the sponge roller of one embodiment as shown in FIG. 1 includes the following steps:

S10. Providing a sponge roller to be processed.

2, the sponge roller includes a rigid heat conducting shaft 10 and a sponge sleeve 20 sleeved on the rigid heat conducting shaft 10.

The rigid heat conducting shaft 10 can be selected as a thermally conductive rigid material. Specifically, the material of the rigid heat conducting shaft 10 is selected from at least one of iron, copper, aluminum, and nickel. The material of the rigid heat conducting shaft 10 can also be other types of composite shaft materials.

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

In the present embodiment, the sponge cover 20 has a cylindrical shape.

As shown in FIG. 2, in the present embodiment, the sponge sleeve 20 is shorter than the rigid heat conducting shaft 10, and the sponge sleeve 20 is sleeved in the middle of the rigid heat conducting shaft 10.

S20, providing a mold 30.

Referring to FIG. 3, an inner cavity accommodating the sponge cover 20 is formed in the mold 30, and the inner diameter of the inner cavity of the mold 30 is smaller than the outer diameter of the sponge cover 20.

Specifically, the inner diameter of the inner cavity of the mold 30 can be adjusted depending on the specific sponge cover 20 and the specific compression requirements, and the outer diameter of the sponge cover 20 can also be adjusted.

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

In this embodiment, the inner cavity of the mold 30 is cylindrical.

As shown in FIG. 2, in the present embodiment, the mold 30 includes a first mold block 32 and a second mold block 34. The first mold block 32 is provided with a first circular arc groove, and the second mold block 34 is provided with a second circular arc groove. The first mold block 32 and the second mold block 34 are combined to form the first circular arc groove and the mold 30. The second circular arc groove forms the inner cavity of the mold 30.

In the present embodiment, the first mold block 32 and the second mold block 34 have the same shape.

S30. Heat the rigid heat conducting shaft 10 to 100 ° C to 350 ° C, and place the sponge roller in the inner cavity of the mold 30. After the rigid heat conducting shaft 10 is cooled, the sponge roller is taken out.

The heating method of the rigid heat-conducting shaft 10 is not limited, and non-contact heating such as microwave, infrared, direct electric heating, etc. may be used.

In the present embodiment, the heating temperature of the rigid heat-conductive shaft 10 is 180 ° C, 200 ° C, and 240 ° C.

In the operation of heating the rigid heat conducting shaft 10 to 100 ° C ~ 350 ° C, the heating rate of the rigid heat conducting shaft 10 is 60 ° C / s ~ 100 ° C / s, the time required for the rigid heat conducting shaft to heat to 100 ° C ~ 350 ° C is 1.5 s~5s.

By heating the rigid heat-conducting shaft 10, the heat on the rigid heat-conducting shaft 10 is longitudinally transmitted outward along the rigid heat-conducting shaft 10. The sponge closest to the rigid heat-conducting shaft 10 of the sponge sleeve 20 sleeved on the rigid heat-conducting shaft 10 is first heated and melted and deformed. Further, since the mold 30 applies the squeeze to the sponge cover 20, the internally melt-deformed sponge cover 20 is pressed and fused, so that the sponge density inside the sponge cover 20 becomes large and the hardness is improved.

Because the foam has many cells and the thermal conductivity is small, the thermal conductivity of the sponge is poor. Therefore, only the sponge within a certain distance near the rigid heat-conducting shaft 10 is heated and melted, and the heat is gradually attenuated during the conduction process. The deformation rate is stepped from the inside to the outside.

By controlling the rigid heat-conducting shaft 10 to be heated to 100 ° C to 350 ° C, the sponge on the outer surface of the inner compressed sponge sleeve 20 is not deformed, and the surface cells are kept in conformity with that before compression, and the inner portion of the sponge sleeve 20 is compressed, and the sponge roller is compressed. The parameters such as density, hardness, and back-elasticity are improved, and at the same bite amount, the internally compressed sponge roll is larger than the uncompressed bite force.

The following are specific examples.

Table 1: The respective parameters in Examples 1 to 6 and the amount of compression of the sponge sleeve of the obtained sponge roll.

	Sponge cover material	Rigid heat conduction shaft heating temperature ( °C )	Rigid heat conduction shaft heating time ( s )	Inner diameter of the cavity of the mold (mm)	Outer diameter of the sponge sleeve before compression ( mm )	The outer diameter of the sponge sleeve after compression (mm)	The difference between the outer diameter of the sponge sleeve and the inner diameter of the inner cavity of the mold (mm)	Compression amount ( mm )
Example 1	Polyurethane	200	3 ± 0.5	14	15	14.4	1	0.6
Example 2	Polyurethane	200	3 ± 0.5	13.3	15.4	14	2.1	1.4
Example 3	Polyurethane	200	3 ± 0.5	13	15.8	14.2	2.8	1.6
Example 4	Polyurethane	200	3 ± 0.5	12	15.3	13.2	3.3	2.1
Example 5	Polyether	100	1.2 ± 0.2	11	15.4	14.6	4.4	0.8
Example 6	Polyether	180	2.5 ± 0.5	11	15	12.4	4	2.6
Example 7	Melamine	240	3.5 ± 0.5	11	15.4	12.6	4.4	2.8
Example 8	Melamine	350	4.5 ± 0.5	11	15.4	11.5	4.4	3.9

Referring to Table 1 above, it can be seen that in Examples 1 to 6, the inner diameter of the inner cavity of the specific mold is selected according to the outer diameter of the sponge sleeve and the actual demand, and the internal compression is controlled by controlling the heating temperature and heating time of the rigid heat-conductive shaft. The sponge on the outer surface of the sponge cover of the obtained sponge roller was not deformed, and the surface cells remained consistent with those before compression.

The above-mentioned embodiments are merely illustrative of one or more embodiments of the present invention, and the description thereof is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims (15)

1. An internal compression method for a sponge roller, comprising the following steps:

   Providing a sponge roller to be treated, the sponge roller comprising a rigid heat conducting shaft and a sponge sleeve sleeved on the rigid heat conducting shaft;

   Providing a mold in which an inner cavity accommodating the sponge sleeve is formed, an inner diameter of the inner cavity of the mold being smaller than an outer diameter of the sponge sleeve;

   The rigid heat conducting shaft is heated to 100 ° C ~ 350 ° C, and the sponge roller is placed in the inner cavity of the mold, and the sponge roller is taken out after the rigid heat conducting shaft is cooled.
2. The method of claim 1 wherein the material of the rigid thermally conductive shaft is selected from at least one of iron, copper, aluminum, and nickel.
3. The method of claim 1 wherein the material of the sponge cover is polyester, polyether or melamine.
4. The method of claim 1 wherein the material of the sponge cover is polyurethane or polyvinyl alcohol.
5. The method according to claim 1, wherein said rigid heat conducting shaft is heated to a temperature of from 100 ° C to 350 ° C, and said rigid heat conducting shaft has a heating temperature of 180 ° C, 200 ° C or 240 ° C.
6. The method according to claim 1, wherein said heating of said rigid heat conducting shaft to a temperature of from 100 ° C to 350 ° C, said heating rate of said rigid heat conducting shaft is from 60 ° C / s to 100 ° C / s .
7. The method according to claim 6, wherein in the operation of heating the rigid heat conducting shaft to 100 ° C to 350 ° C, the time required for the rigid heat conducting shaft to be heated to 100 ° C to 350 ° C is 1.5. s~5s.
8. The method according to claim 1, wherein in the operation of heating the rigid heat conducting shaft to 100 ° C to 350 ° C, the time required for the rigid heat conducting shaft to be heated to 100 ° C to 350 ° C is 1.5. s~5s.
9. The method of claim 1 wherein said sponge sleeve is cylindrical.
10. The method of claim 9 wherein the inner cavity of the mold is cylindrical.
11. The method according to claim 10, wherein the inner diameter of the inner cavity of the mold is smaller than the outer diameter of the sponge sleeve by 0.5 mm to 4.5 mm.
12. The method according to claim 10, wherein said mold comprises a first mold block and a second mold block, said first mold block being provided with a first circular arc groove, said second mold block being provided There is a second circular arc groove, and the first circular arc groove and the second circular circular groove form an inner cavity of the mold after the first mold block and the second mold block are combined to form the mold.
13. The method of claim 12 wherein said first mold block and said second mold block are identical in shape.
14. The method according to claim 1, wherein said mold comprises a first mold block and a second mold block, said first mold block is provided with a first circular arc groove, and said second mold block is provided There is a second circular arc groove, and the first circular arc groove and the second circular circular groove form an inner cavity of the mold after the first mold block and the second mold block are combined to form the mold.
15. The method of claim 14 wherein said first mold block and said second mold block are identical in shape.