JP2005140256A - Friction plate manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve production efficiency in manufacturing a friction plate. <P>SOLUTION: A core plate 1 punched into a given shape in a core plate punching process 20 is surface-roughened, pretreated in a surface harshening process 30 and a cleaning process 40, coated with an adhesive agent both the sides in an adhesive agent coating process 50, overlapped with a friction material 2, punched into a given shape in a friction material punching process 60, in an overlapping process 70; thereafter, the overlapped work 3 is sent to a drying and hardening process 80. High-frequency heating is applied to the core plate 1 in contact with the adhesive agent to harden the adhesive agent, and the core plate 1 with the adhesive agent is heated and pressurized by a hot press 91 in a proper adhering process 90, thus completing the friction plate 4. Since the high-frequency heating is used in this case, the equipment can be small-sized, an amount of time required to manufacture the friction plate 4 is shortened, thus improving the production efficiency. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method of manufacturing a friction plate used in an automatic transmission or the like, and more particularly to a method of drying and curing an adhesive.

  In the past, when manufacturing friction plates by attaching a friction material to the core plate, in order to increase the adhesive strength, the adhesive surface was roughened, or sandblasting was applied as a pretreatment such as degreasing and cleaning. Degreasing with an alkaline detergent, pickling with sulfuric acid, etc., neutralization with a neutralizing agent, etc. have been performed.

  However, blasting tends to cause deformation of the core plate, and wear of peripheral equipment due to powder used for blasting is also likely to occur. In addition, since environmental problems have been taken up, a means to replace the above-described preprocessing means is also desired.

Accordingly, various inventions for solving the above-described problems have been made.
Prior art documents
JP 2002-327782 A

Conventional example

  FIG. 6 shows a flow 10C of the manufacturing process of the conventional example described in the above technical document. 30 is a surface roughening step of the core plate, and the core plate 1 punched into a predetermined shape is supplied to the conveyor 32 as indicated by an arrow 31 and buffed on one side by the baffle 34. Subsequently, it is attracted to the magnetic conveyor 33 and buffed to the other side. After being buffed, the magnetism is removed by the demagnetizer 35 and sent to the cleaning step 40.

  41 is a rough cleaning process, 42 is a finishing cleaning process, 43 is a drying process, 44 is a shower of water or hot water, 45 is a nylon brush, 46 is a shower of finishing water or hot water, and 47 is for removing moisture. The compressed air nozzle 48 is a roller conveyor for feeding the core plate. By buffing in this way, the surface is slightly scraped off, the adhesion surface is roughened, and the attached oil can be removed together, so that alkali washing and pickling treatment can be omitted.

  50 is an adhesive application step, 51 is an adhesive supply pipe, and 52 is an adhesive tank. Also, a set of a large roll 53 and a small roll 54 is arranged above and below, an adhesive is supplied between the upper rolls 53, 54, and the lower rolls 53, 54 are immersed in the tank 52. Therefore, the adhesive is adhered and held on the surface of the large roll 53, and the adhesive is applied to both surfaces of the core plate 1 that passes between the large rolls 53 and 53. The small rolls 54 and 54 have a role of adjusting the amount of adhesive that adheres to the large rolls 53 and 53.

  Reference numeral 80 denotes an adhesive drying and curing step. The core plate 1 coated with the adhesive is sprayed with hot air at a predetermined temperature in a furnace 85, and the adhesive is dried and cured.

  The flow of the core plate after the adhesive is dried and hardened is indicated by an arrow 71, while the flow of the friction material punched into a predetermined shape is indicated by an arrow 72, and both are superimposed and sent to the main bonding step 90.

  Reference numeral 91 denotes a hot press, in which a superposed body 3 of a core plate and a friction material coated with an adhesive and dried and cured is heated and pressed by the hot press 91 in the main bonding step 90 and completed. A friction plate 4 is formed.

  In the above-described conventional example, consideration is given to environmental problems, and the adhesive is applied to the inner periphery of the core plate by dipping as before. Advantages such as improving the point where the accuracy of the clearance was not maintained are recognized, but since the hot air oven is used for drying and curing the adhesive, the equipment takes a lot of space and the drying time takes 4 minutes. There were problems such as.

  Therefore, the object of the present invention is to improve the production efficiency by making it possible to carry out the drying and curing of the adhesive with a small-scale facility or shortening the drying and curing time.

  In order to solve the above-mentioned problems, the present invention provides a method for producing a friction plate by laminating a core plate of a predetermined shape and a friction material via an adhesive, and drying and curing the adhesive, thereby drying and curing the adhesive. A friction plate manufacturing method is obtained, wherein the process is performed by high-frequency heating of the core plate in contact with the adhesive.

  In this invention, since the drying and curing of the adhesive is performed by high-frequency heating of the core plate, it can be performed in a short time with a small apparatus, and the production efficiency can be improved.

  After pre-processing such as surface roughening and washing on the core plate punched into a predetermined shape, adhesive is applied to both sides, and after overlaying the friction material punched into a predetermined shape, the core plate is The adhesive is dried and cured by heating, and then heated and pressed with a hot press to perform the main adhesion, thereby completing the friction plate.

  The setting of the high frequency heating can be arbitrarily selected according to the size of the friction plate and the property of the adhesive. For example, it is desirable to set the distance between the heating coil and the core plate in the range of 5 to 500 mm, output 1 to 300 Kw, frequency 20 to 300 KHz, and heating time 4 to 6 seconds.

  In the conventional hot air furnace, equipment with a length of about 10m and a width of about 3m was required, and the processing time took about 4 minutes. However, with a high-frequency heating facility, a length of about 1m and a width of about 0.5m are sufficient, and the processing time is also long. In about 5 seconds, production efficiency has been greatly improved.

  FIG. 1 is a diagram showing a process flow 10A of the first embodiment of the present invention. Reference numeral 20 denotes a core plate punching step, 21 denotes a metal strip roll, 22 denotes a punching machine, 23 denotes a metal strip drawn from the roll 21, and 1 denotes a core plate punched into a predetermined shape.

  Reference numeral 30 denotes a surface roughening step of the core plate, and the core plate 1 punched into the predetermined shape is supplied onto the conveyor 32 and roughened by the baffle 34 as indicated by an arrow 31. Next, the core plate 1 is attracted to the next conveyor 33 having magnetism, the surface of the opposite surface is roughened by the baffle 34, the magnetism is removed by the demagnetizer 35, and sent to the next cleaning step 40.

  The material of the buff is not limited to a specific material, but an example in which abrasive grains are embedded in urethane is used. Then, the amount of cutting the core plate can be minimized. Then, by removing the surface of the core plate, there is no need for a degreasing step and a pickling step. Further, magnetic adsorption of the conveyor 33 can be obtained by simple means such as arranging magnets between the belts of the conveyor.

  The cleaning process 40 includes a rough cleaning process 41, a finishing cleaning process 42, and a drying / dehumidifying process 43. 44 is a shower of water or hot water, 45 is a nylon brush, 46 is a shower of water or hot water for finishing, and 47 is a nozzle of compressed air for drying and dehumidification. A roller conveyor 48 conveys the core plate 1. The core plate 1 subjected to the surface roughening and the cleaning pretreatment is sent to the next adhesive application step 50.

  In the figure, 51 is an adhesive supply pipe, 52 is an adhesive tank, 53 and 53 are large rolls, and 54 and 54 are small rolls combined with large rolls. An adhesive is supplied between the upper large roll 53 and the small roll 54, and the lower rolls 53 and 54 are immersed in the tank 52. The small roll 54 has a role of adjusting the amount of adhesive that adheres to and is held by the large roll 53. By passing the pretreated core plate 1 between the large rolls 53, 53, an adhesive is applied to both sides thereof.

  60 is a friction material punching process, 61 is a friction material roll, 62 is a punching machine, 63 is a band of friction material drawn from the roll, and 2 is a friction material punched into a predetermined shape. The friction material 2 punched into a predetermined shape is sent to the overlapping step 70 with the core plate 1 as indicated by an arrow 72.

  In the superimposing step 70, the superposition is performed with the core plate 1 coated with an adhesive on both sides. In the drying and curing process 80, while the superposed body 3 is moved by the conveyor 81, the core plate 1 in contact with the adhesive is subjected to high-frequency heating, and the adhesive is dried and cured. In the final main bonding step 90, the stacked body 3 is heated and pressed by a hot press 91 to complete the friction plate 4.

  FIG. 2 shows an apparatus in the drying and curing process 80, 82 is a high-frequency oscillator, 83 is a heating coil connected thereto, and the superposed body 3 of the core plate 1 and the friction material 2 is being conveyed by the conveyor 81. High frequency heating can be applied to 3A and 3B show a conveying device, in which FIG. 3A is a plan view of a state in which the superposed body 3 of the core plate 1 and the friction material 2 is conveyed on the conveyor 81, and FIG. Each figure is shown.

  FIG. 4 shows a process flow 10B of the second embodiment, and the same reference numerals as those in FIG. 1 denote the same parts. The second embodiment is exactly the same as the first embodiment in the punching step 20 of the core plate 1, the punching step 60 of the friction plate 2, and the surface roughening step 30 and the cleaning step 40, which are pretreatments of the core plate 1. Therefore, repeated description is omitted.

  In the second embodiment, in the step of applying the adhesive to the pretreated core plate 1, the adhesive is applied on one side before being overlapped with the friction material, dried and cured, and then overlapped with the friction material. It is like that. That is, the pretreated core plate 1 is sent to the first adhesive application step 50A, is contacted with the large roll 53 and is coated with an adhesive on one side, and then dried and cured in the first dry curing step 80A. The core plate 1 on which the adhesive is applied is inverted in the inversion process 58. The inverted core plate 1 is conveyed by the roller conveyor 55, and in the second adhesive application step 50B and the second dry curing step 80B, the adhesive is also applied to the other surface and dried and cured.

In this way, the core plate 1 coated with adhesive on both sides through the reversal process and dried and hardened, and the friction material 2 punched into a predetermined shape are overlapped and overlapped here as indicated by arrows 71 and 72. The laminated body 3 is sent to the main bonding step 90 and heated and pressed by a hot press 91 to complete the friction plate 4.
In the second embodiment, the configuration of the adhesive drying and curing apparatus is the same as that of the first embodiment.

  FIG. 5 shows a modification of the second embodiment in which the adhesive is applied to both surfaces of the core plate, dried and cured, and then overlapped with the friction material in the third embodiment. It is a figure which shows the state which is conveying the core plate 1 which apply | coated with the chain belt 73, (A) is a top view, (B) is the side view which looked at (A) from the F direction.

  In the third embodiment, since the adhesive is applied to both surfaces of the core plate and dried and cured, it is not necessary to invert the core plate or repeat the same process twice as in the second embodiment.

  In each embodiment, the surface of the core plate is roughened by buffalo, but it can also be carried out by pickling or blasting in addition to the baffle.

The figure which shows the process of 1st Example of this invention. Diagram showing the drying and curing device for adhesives The figure which shows a part of conveying apparatus in 1st Example. The figure which shows the process of 2nd Example. The figure which shows a part of conveyance apparatus in 3rd Example. The figure which shows the process of a prior art example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Core plate 2 Friction material 3 Laminated body 4 Completed friction plate 20 Core plate punching process 21 Metal band roll 22 Punching machine 23 Metal band 30 Surface roughening process 31 Core plate supply direction 32 Conveyor 33 Magnetic conveyor 34 Bafrol 35 Demagnetizer 40 Cleaning process 41 Rough cleaning process 42 Finishing cleaning process 43 Drying / dehumidification process 44 Shower 45 Nylon brush 46 Shower 47 Nozzle 48 Roller conveyor 50 Adhesive application process 51 Adhesive supply pipe 52 Tank 53 Large roll 54 Small Roll 55 Roller conveyor 60 Friction material punching process 61 Friction material roll 62 Punching machine 63 Friction material band 70 Overlay process 71 Core plate feed direction 72 Friction material feed direction 80 Drying and curing process 81 Conveyor 90 Main bonding process 91 Hot press

Claims (5)

Obtaining a core plate and a friction material having a predetermined shape by punching;
Roughening and cleaning the surface of the core plate;
Applying an adhesive to at least one of the core plate or the friction material;
A step of superimposing the core plate and the friction material through an adhesive;
Drying and curing the adhesive;
In the manufacturing method of the friction plate, comprising the step of performing the main bonding by heating and pressurizing the core plate and the friction material superimposed through the adhesive,
The method of manufacturing a friction plate, wherein the step of drying and curing the adhesive is performed by high-frequency heating of a core plate in contact with the adhesive.   The high-frequency heating is performed for 4 to 6 seconds at an output of 1 to 300 KW and a frequency of 20 to 300 KHz with an interval of 5 to 500 mm with respect to the core plate in contact with the adhesive. The manufacturing method of the friction plate of description.   The friction plate according to claim 1 or 2, wherein the step of superimposing the core plate and the friction material via an adhesive is provided before the step of drying and curing the adhesive. Manufacturing method.   The adhesive application process to the core plate and the adhesive drying and curing process are repeated for each side of the core plate, and the adhesive is applied to one side during the application and drying and curing of the adhesive on each side. The method for producing a friction plate according to claim 1, further comprising a step of inverting the dried and hardened core plate.   In the process of applying the adhesive to the core plate, adhesion is performed on both sides of the core plate, the adhesive is dried and cured, the friction material and the core plate are overlapped, and the main material is bonded by heating and pressing. The method for manufacturing a friction plate according to claim 1 or 2, wherein

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