JP2006055970A - Method for cutting cleaning member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for continuously cutting a cleaning member without any help of a person and for recovering soft parts without adhered adhesive. <P>SOLUTION: A carrying sheet and the cleaning member are made to closely adhere to each other by a method for making a vacuum state by venting air without providing an adhering layer between the carrying sheet and the cleaning member, or by a method for working electrostatic force between the carrying sheet and the cleaning member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for cutting a cleaning member used in a copying machine, a printer, or the like.

  As a molded article of the cleaning member, for example, there is a cleaning blade for removing deposits adhering to the ejection port surface of an inkjet head that performs recording by ejecting ink in an inkjet printer. Such a cleaning member roughly cuts a sheet made of a rubber elastic body and then punches the cut sheet using a mold having a punch and a die having a desired shape, or a mold having a cutting blade. Manufactured by punching using a mold.

In such a punching process, an example has been introduced in which a press machine capable of continuous and highly accurate pressing is used. (Patent Document 1)
However, in the punching process using a conventional punching die, there are the following problems, respectively. In the punching process, soft parts or scrap materials must be removed by performing the process, and it is necessary to manually collect the soft parts after the processing. Also, in the punching process, it is a process that requires an underlay, and the durability of the blade will be significantly reduced if it is repeatedly processed using the underlay that has been processed once. There is a need.

In addition, when punching a soft body continuously, the soft body and the transport sheet are prevented from being displaced during transport, and the soft body obtained after punching is prevented from falling off the transport sheet. A laminated sheet was prepared by temporarily bonding the body to the conveying sheet, and this was used as a processing sheet. Therefore, an adhesive layer for fixing the two sheets is required between the transport sheet and the soft body, and a pressure-sensitive adhesive (adhesive layer) is attached to the obtained product. When the pressure-sensitive adhesive is attached to the product as described above, there is a problem that a process for removing the pressure-sensitive adhesive attached to the product after processing has to be provided.
JP 2001-1297 A

  The present invention has been made in view of the above circumstances, and can easily carry out the punching process without relying on human hands without sticking the conveyance sheet and the soft body easily without providing an adhesive layer, and has no adhesive. It is an object of the present invention to provide a manufacturing method capable of collecting soft parts.

The above object can be achieved by having the following configuration. That is, the present invention alternately carries and stops a belt-like sheet having a cleaning member composed of one or more layers on the carrying sheet in a predetermined direction, and when the belt-like sheet is stopped, the cutting blade is used as the cleaning member. In the cutting method of the cleaning member for cutting by inserting until it penetrates in the thickness direction of
The present invention relates to a method for cutting a cleaning member, characterized in that the conveying sheet and the cleaning member are brought into close contact with each other by evacuating and forming a vacuum state without providing an adhesive layer between the conveying sheet and the cleaning member.

Further, the present invention alternately performs conveyance and stop in a predetermined direction of a belt-like sheet formed by closely adhering a cleaning member consisting of one or more layers on the conveyance sheet, and when the belt-like sheet is stopped, the cutting blade is used as the cleaning member. In the cutting method of the cleaning member for cutting by inserting until it penetrates in the thickness direction of
The present invention relates to a method for cutting a cleaning member, characterized in that the conveying sheet and the cleaning member are brought into close contact with each other by applying an electrostatic force without providing an adhesive layer between the conveying sheet and the cleaning member.

  Hereinafter, the present invention will be described in more detail.

  The cleaning member can be continuously cut without relying on human hands, and the soft parts free of adhesive can be collected.

  The present invention is a method for cutting a cleaning member composed of at least two layers in which a soft body (cleaning member) is adhered to a transport sheet without providing an adhesive layer. In the cutting method of the present invention, a cleaning member having a predetermined hardness, size, and shape can be cut with high accuracy and a high throughput. The cleaning member is formed as a molded body having a predetermined width, length, and thickness in another process. For example, it is necessary to cut the molded body to a desired size for use in an electrophotographic apparatus. In some cases, the cutting method of the present invention can be used. Next, the present invention will be described in more detail with an example of a preferred embodiment.

  The cleaning member cutting apparatus of the present invention has an upper mold 1 and a lower mold 2 as shown in FIG. The upper die 1 is provided with a cutting blade 3, and an engraving blade is used as the cutting blade 3 to be used. In addition, the cutting blade 3 is a blade matched with a desired shape, and the blade edge angle is generally 15 to 55 degrees. Note that the blade edge angle varies depending on the material to be processed and the material, and the smaller the blade edge angle, the more suitable for cutting, but the life of the blade edge is shortened.

  The cutter used for the cutting blade 3 is not limited to an engraving blade, and a Thomson blade, a razor blade, or a cutter blade can be used.

  The cutting blade 3 is formed on the lower surface of the substrate 6 of the upper mold 1, and the elastic members 4 and 5 are arranged and fixed so as to surround the cutting blade 3. The elastic members 4 and 5 have a shape matching the shape of the cutting blade, and are formed from an elastic member such as a rubber sponge. As the elastic member, natural rubber, synthetic rubber, urethane rubber, silicon rubber, or the like can be used. Moreover, it is preferable that the hardness of an elastic member is 25-70 degrees, and it is more preferable that it is 30-45 degrees. When the hardness of the elastic member is within these ranges, the belt-like sheet can be fixed at a predetermined position by the pressing force of the elastic member when the cleaning member is cut, and the cleaning member can be cut with high accuracy by the cutting blade.

  The length of the cutting blade 3 is longer than the thickness of the soft body (cleaning member) 12 of the belt-shaped sheet material, and the thickness of the elastic members 4 and 5 is thicker than the length of the cutting blade 3. Yes. The elastic member is preferably 0.5 to 5 mm or more thicker than the cutting blade, more preferably 1 to 2 mm or more.

  Next, an example of a belt-like sheet for carrying out the production of the cleaning member of the present invention will be described. The belt-like sheet used in the present invention is a belt-like sheet as shown in FIG. 2, and is composed of two or more layers of a hard resin (PET, PE, PP, PA, etc.) that is the conveyance sheet 11 and a soft body 12. 11, the soft body 12 is overlaid so that the air between the two layers is removed. It is preferable to use urethane as the cleaning member. Further, the thickness of the cleaning member is preferably 0.5 to 1.5 mm, and more preferably 0.5 to 0.7 mm. The hardness is preferably 65 to 85 °, and more preferably 70 to 80 °. When the material, thickness, and hardness of the cleaning member are within these ranges, stable and highly accurate cutting can be performed.

  Various methods can be used as the air venting method. For example, as shown in FIG. 4, the roller 14 is rotated on the belt-like sheet, and air is vented between the two layers by applying a force from above to convey the air. A sheet | seat and a soft body can be stuck. In addition, it is preferable to use a non-chargeable roller such as Teflon as the roller used for bleeding between the two layers, and the load applied from above the roller is preferably 0.2 to 2.5 kgf, 1.0 to More preferably, it is 1.5 kgf. Further, not only the roller 14 but also air can be removed by applying a force from above using a blade 15 as shown in FIG. The following peeling evaluation was performed with the two layers in close contact.

  Here, “adhesion” refers to the conveyance sheet to such an extent that the soft body on the conveyance sheet does not shift during the cutting method of the present invention (process of carrying, stopping, and cutting when stopped). Indicates that the soft body is attached. Note that the transport sheet and the soft body are in close contact with each other so that they can be easily separated from the transport sheet by applying a physical force to the cut soft body. In order to check whether or not the transport sheet and the soft body are in close contact with each other, the transport sheet 11 is fixed, and the soft body 12 is pushed with a finger in the horizontal direction, so that the soft body does not transport from the transport sheet. As a result of the evaluation, all the transport sheets 11 used as shown in Table 1 were able to be completely adhered (adhered). The transport sheet 11 is not limited to hard resin, and unemployed cloth, paper, or the like can be used.

Evaluation method: One of the two laminated sheets is fixed, and whether or not the other sheet does not move even if the other is pushed in the horizontal direction is evaluated. The case where it does not move is indicated by “◯”, and the case where it moves is indicated by “X”.

  Further, as another method for bringing the conveying sheet 11 and the soft body 12 into close contact with each other, as shown in FIG. 6, the conveying sheet 11 is rubbed with a brush 16 to generate static electricity, and the soft body 12 is superimposed and adhered thereon. As a brush for generating static electricity, a roller made of synthetic rubber or urethane rubber, a brush made of nylon, or the like can be used. For static electricity, at least one of the sheets must be charged. In order to examine whether or not the transport sheet and the soft body adhered in this manner are in close contact, when the strip-like sheet adhered by static electricity was evaluated for peeling, the transport sheet 11 and the soft sheet as shown in Table 2 were evaluated. The conveying sheet 11 and the soft body 12 could be adhered by applying static electricity to both or one of the bodies 12. Note that not only the brush 16 but also a method of generating static electricity by rubbing with the blade 15 as shown in FIG. Specifically, a blade made of urethane, a foam made of synthetic rubber, or the like is used.

Evaluation method: A conveying sheet is placed downward, and a soft material is placed thereon. In addition, it is evaluated by whether the installation surface of the conveyance sheet and the soft material is charged with static electricity, one of the two layers of sheets is fixed, and the other is not peeled even if it is pushed with a finger in the horizontal direction. Moreover, the case where it does not exfoliate is set as “◯”, and the case where it exfoliates is indicated as “x”.

  In order to cut the cleaning member, a press machine that can move the upper die in the thickness direction of the cleaning member can be used. The present invention is performed using a press machine 21 capable of continuous high-precision control processing.

  Next, a method for cutting the cleaning member will be described (see FIG. 8). An upper mold (for example, the upper mold 1 in FIG. 1) is set in the press machine 21. A belt-like sheet is supplied to the upper surface of the lower die 2 of the punching die. In addition, although not shown in figure, the soft body 12 is continuously arrange | positioned with respect to the conveyance direction on the conveyance sheet | seat 11 before cleaning member cutting | disconnection. The feeding device 22 is configured to alternately transport and stop the belt-like sheet such that the belt-like sheet is stopped for a predetermined distance and then stopped and then transported again for a predetermined distance after the soft body is cut. Typically, the interval for stopping is 5 to 25 mm, and the conveying speed is 2.5 to 25 mm / s. The cutting blade 3 provided on the upper substrate 6 is pushed (inserted) from the upper surface of the soft body 12 through the cleaning member by the operation of the press machine. Although not clearly shown in FIG. 8, the soft body 12 is in close contact with the transport sheet 11 in this apparatus. For this reason, the cutting blade 3 is inserted from the soft body 12 side.

  At this time, since the elastic members 4 and 5 arranged and fixed on the upper mold substrate 6 are thicker in the thickness direction than the cutting blade 3, they are compressed when the cutting blade is inserted into the cleaning member. The belt-like sheet is fixed at a predetermined position by the pressing force. The cutting blade 3 is pushed in from the upper surface of the soft body 12 by the operation of the press machine, passes through the cleaning member, and is inserted into a part of the transport sheet 11. The insertion speed of the cutting blade into the cleaning member at this time is preferably 50 to 500 mm / s, and more preferably 150 to 300 mm / s. At this time, if the pushing amount of the cutting blade into the conveying sheet 11 (the length in the conveying sheet thickness direction of the cutting blade inserted into the conveying sheet) is in the range of 10 to 90% of the thickness of the conveying sheet 11, Cutting is possible.

  After the cutting, when the upper die 1 and the lower die 2 are separated by a press machine, the soft body 12 is separated from the cutting edge of the cutting blade 3 by the restoring force of the compressed elastic members 4 and 5 to the original shape and conveyed. The sheet 11 is placed on the sheet 11 while maintaining a fixed position.

  The processed soft body 12 is sequentially fed together with the conveying sheet 11 by the feeding device 22 and the winding device 23, and the post-processing after the processing is not required, and a soft part having a desired shape can be continuously formed.

Example 1
Embodiments of the present invention will be described below based on examples.

  For example, with respect to a method for manufacturing a cleaning blade that removes deposits adhering to the discharge port surface of an inkjet head that performs recording by discharging ink in an inkjet printer, the results of cutting using the upper mold of FIG. Explained.

  On the PET film surface charged with static electricity by drawing the PET film 11 that has been automatically wound into a roll while being rubbed with a urethane sheet from the top, 0.5 mm thick urethane (urethane rubber (product name): Canon) Kasei Co., Ltd.) 12 was placed, and a belt-like sheet in which urethane was adhered to the PET film was disposed. Next, the punching tool (the clearance between the punching punch and the punching die is 3 μm) is drilled at two locations as a reference, and then the engraved blade 3 manufactured to have a cutting edge angle of 30 ° is cleaned at a speed of 180 mm / s. And the cleaning member is cut. Note that since the punching die and the cutting die are combined into the same die, it is possible to carry out accurate progressive processing, so that the dimensions shown in FIG. 9 can be machined with an accuracy that satisfies the standard dimensions as shown in Table-3.

(Comparative example)
As a comparative example of the present invention, a cutting edge angle of 30 ° is applied to a belt-like sheet in which the conveying sheet 11 and the polyurethane 12 are overlapped without being adhered (the polyurethane 12 is superimposed on the conveying sheet 11 without any treatment). As a result of cutting the cleaning member with the engraving blade 3 manufactured as described above, it was difficult for the soft body to fall off the transport sheet during processing and to process with the dimensions within the standard. The results are shown in Table-3.

  In addition, as an evaluation method of processing accuracy in Table-3, evaluation was performed based on whether a product obtained by continuous processing could be processed within the following dimensional tolerances. Evaluation was made with “◯” for those that could be machined within the tolerance, and “x” for those that could not be machined within the tolerance.

  That is, for each dimension A to E in FIG. 9, A: 11 mm ± 0.15 mm, B: 15 mm ± 0.15 mm, C: 3 mm ± 0.15 mm, D: 6 mm ± 0.1 mm, E: 2 mm ± Judgment was made based on whether the tolerance was within 0.2 mm.

  As shown in Table 4, in the cleaning blade cutting method (Example 1) of the present invention, the cleaning member can be cut in a processing time that is 1/5 or less of the conventional processing method (Comparative Example). Since no adhesive is used for adhesion between the sheet and the soft body, the soft parts after cutting must be recovered while maintaining the positionality without being peeled off from the belt-like sheet without sticking the adhesive. I can do it. Moreover, in Example 1, unlike the comparative example, the dimensional accuracy (processing accuracy) was excellent in each of the dimensions A to E in Table 3, and peeling of the soft member was not recognized.

It is the schematic of an upper mold | type. It is a block diagram of a strip-shaped sheet. It is sectional drawing at the time of the cutting | disconnection of a cleaning member. It is the schematic of the contact | adherence method using a roller. It is the schematic of the contact | adherence method using a braid | blade. It is the schematic of the contact | adherence method charged with static electricity using the brush. It is the schematic of the contact | adherence method charged with static electricity using the roller. It is the schematic of the collection | recovery method of the cut | disconnected cleaning member of this invention. This is the dimension measurement part of the molded product.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper mold | type 2 Lower mold | type 3 Cutting blade 4,5 Elastic member 6 Upper mold | type board | substrate 11 Conveyance sheet 12 Soft body 13 Work table 14 Roller 15 Blade 16 Brush 21 Press machine 22 Feeding device 23 Winding device

Claims (3)

A belt-like sheet formed by closely adhering a cleaning member consisting of one or more layers on the conveyance sheet is alternately conveyed and stopped in a predetermined direction, and when the belt-like sheet is stopped, a cutting blade is penetrated in the thickness direction of the cleaning member. In the cutting method of the cleaning member that cuts by inserting until
A method for cutting a cleaning member, characterized in that, without providing an adhesive layer between the transport sheet and the cleaning member, the transport sheet and the cleaning member are brought into intimate contact with each other by removing air and creating a vacuum state. A belt-like sheet formed by closely adhering a cleaning member consisting of one or more layers on the conveyance sheet is alternately conveyed and stopped in a predetermined direction, and when the belt-like sheet is stopped, a cutting blade is penetrated in the thickness direction of the cleaning member. In the cutting method of the cleaning member that cuts by inserting until
A method for cutting a cleaning member, wherein the conveying sheet and the cleaning member are brought into close contact with each other by applying an electrostatic force without providing an adhesive layer between the conveying sheet and the cleaning member. When inserting the cutting blade into the cleaning member,
2. The belt-like sheet is previously pressed and fixed at a predetermined position by an elastic member provided so as to surround the cutting blade and projecting below the cutting blade in the insertion direction of the cutting blade. Or the cutting method of the cleaning member of 2.

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