JPH039345B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manufacturing method that allows continuous mass production of bearing sealants.

Conventionally, as shown in Fig. 1, the method for manufacturing a bearing sealant is to place a reinforcing material core 3 in a lower mold 2 of a mold for molding a bearing sealant, and to supply synthetic rubber 4 on top of this. After the upper mold 1 was closed and the rubber was vulcanized by heating for a certain period of time, it was taken out from the molds 1 and 2 and the burrs were removed to obtain the desired sealing material for a bearing.

For this reason, the molding process of the core metal and the molding process of the sealant are made in separate processes, so there is a risk of defective products due to inserting the wrong core metal or forgetting to insert it.Furthermore, since each core metal is molded one by one, the mold Even if several pieces are lined up and molded at once, it is not possible to mold a large quantity continuously, resulting in high costs, and there are also drawbacks such as a large amount of loss between processes.

The present invention eliminates these drawbacks and provides a method for manufacturing a bearing sealing material that enables continuous mass production.

To explain the present invention based on the drawings, as shown in FIG. This is a manufacturing method for obtaining a sealing material, and the drawing shows the process flowing from left to right. First, a strip-shaped metal core plate 5 is supplied onto the line, and a punch 18 is used to continuously punch a desired hole 6 such as the center hole of a bearing sealant. As shown in Figures 3 and 4, punch the outer shape of the portion that will become the outer peripheral edge 17 of the bearing sealing material with a punch 1.
8, and when bending the outer peripheral edge 17 at a desired location, for example, at least one connecting piece 1 connecting the outer peripheral edge 17 and the core metal plate 5.
A punching step A1 and a bending step A2 in which punching and bending are performed so that the outer peripheral hole 6b is formed and the other holes are formed into outer peripheral holes 6b.
After applying an adhesive for adhering the synthetic rubber to the metal core plate 5 using an adhesive coating roller 7, for example, the metal plate 5 for the core metal plate is dried in an oven or the like, and then heated in a baking machine 8. An adhesive application step B in which the adhesive is applied, dried, and baked; an elastic body 11 made of synthetic rubber or synthetic resin is applied with reference to the hole 6 provided in the metal core plate 5 coated with adhesive; Supply route 9
etc., and as shown in Fig. 5, the upper mold 10a
and a sealing part molding step C in which desired sealing parts 11a, 11b are formed by baking or shaping into a desired shape with a lower mold 10b; and a sealing part 11a,
As shown in FIG. 6, with the sealing portions 11a and 11b provided on the metal sheet 5 for the core metal with the seal portion 11b formed thereon, the connecting piece 12 provided on the metal plate for the core metal with the seal portion formed thereon is punched with a punch 14. This is a method for manufacturing a bearing sealing material in which a bearing sealing material E having a desired shape is obtained by continuously combining cutting and punching step D in which the bearing sealing material is punched out and burrs are simultaneously punched out.

As described above, the manufacturing method of the present invention continuously performs the punching and bending process A, the adhesive application process B, the sealing part molding process C, and the punching process D through the core metal plate 5. The present invention is not limited to the method of action performed in the same process. That is, in the adhesive application method, as shown in FIG. 2, adhesive is supplied to a plate 16, and the adhesive is applied through the core metal plate 5 between the two rollers 7 to which the adhesive has been transferred. In addition to this method, any known method such as coating by spraying, coating through a liquid bath, etc., which ensures reliable coating, may be used without limitation. The applied adhesive can be dried and baked in an oven as shown in the figure, by passing it through the baking machine 8 using an infrared heater or high-frequency heater, or by blowing hot air. There are no particular limitations on the method of baking, and any known method may be used as long as drying and baking can be performed reliably. Furthermore, in the seal part molding step C in which the upper mold 10a and the lower mold 10b are used to mold the seal part, an elastic body 11 such as synthetic rubber or synthetic resin is used to form the seal part, as shown in FIG. The supply method is not limited as long as a predetermined amount is supplied in a timely manner, such as by supplying the material into the mold through a material supply path 9 or by supplying a fixed amount of pellets into the mold.

Also, the punching and bending steps A1 and A2 are performed in the order of the punching step A1 and then the bending step A2, or
A bending device may be attached to the punch 18 to perform the punching step A1 and the bending step A2 at the same time.

In this way, the desired bearing sealing material E is obtained through a series of steps, but the belt-shaped metal core plate 5 after being punched out is automatically wound up and discarded at the final stage of the process.

In addition, in the manufacturing process, punching and bending process A
Even if the order of and adhesive application step B is reversed, the structure of the manufacturing method of the present invention will not change.

According to the manufacturing method of the bearing sealing material of the present invention as described above, the manufacturing process is continuous, so that there is no loss between processes and the molding can be performed continuously. The metal plate 5 for core metal is heated and moved to the next molding process C, so when molding the seal parts 11a and 11b, the heat of the heated metal plate 5 for core metal is used during vulcanization of synthetic rubber etc. Since it can be used, the vulcanization time can be significantly shortened.
Also, by replacing the punch for punching in step A, the upper and lower molds in step C, and the punch and bending jig for step D, it is easy to continuously obtain a large amount of the desired bearing sealing material. I can do it. At this time, material loss can be minimized by changing the feeding pitch of the core metal plate 5 in accordance with the size of the bearing sealing material.

Further, in order to increase the molding speed and improve productivity, it is necessary to shorten the molding time in molding process C or shorten the feeding time. To shorten the molding time, use synthetic rubber with a short vulcanization time and use the heat used for heating in the previous step, but since there is a limit to this, the molding mold for molding process C is used. A large number of reinforcing metal plates 5 are prepared and moved in a rotary manner sequentially and continuously until molding is performed for a certain period of time,
After the molding is completed, the speed can be greatly increased by rotating the molding member away from the reinforcing metal plate 5 on the opposite side and returning to the front of the molding position. Of course, in this case as well, the heat from the previous process is utilized.

In addition, as shown in FIG. 8, in the hole-drilling process in which holes are continuously made in the metal core plate 5, the center hole 6a for the bearing sealant is opened, and at the same time, there is no problem in obtaining the bearing sealant. Small holes 6c for positioning are punched out at regular intervals, preferably at positions close to both edges of the metal plate 5 for core metal, and at positions equidistant from the center hole 6a and the next center hole 6a. If this is done, the feed pitch will be accurate in the next process and subsequent steps, and the positioning during each process of molding, punching, and bending will be accurate, and molding accuracy can be improved.

In addition, as shown in FIG. 9, in the punching step A1 of continuously making holes in the metal core plate 5, when punching the center hole 6a for the bearing sealing material, the part that becomes the outer periphery of the seal and is bent. By punching out a plurality of radial slits 15 at the same time, it is possible to easily bend the bearing sealing material E in the bending step A2, and the outer circumferential portion of the bearing sealing material E can be bent on the same circumference as shown in FIG. By bending the seal portion 11b so that it is uneven, that is, not on the same circumference, it is possible to control the fitting force to the bearing, and also to prevent problems caused by expansion of air due to the rotational heat of the bearing. It is also possible to release air at the short diameter concave portion of the portion 11b, and this adjustment can be easily controlled by the degree of the bending dimension difference. Furthermore, as shown in FIG. 10, it is possible to further facilitate the control of the air by providing an appropriate number of slits 15 extending further than the bending dimension so as not to reach the seal portion 11a provided in the center hole 6a. I can do it. In this case, the same effect can be obtained even if the outer circumferential seal portion 11b is provided not in a concave and convex manner but in a shape bent on the same circumference.

As described above, according to the present invention, in the production of bearing sealing materials, a series of processes from core metal to molding are performed continuously and without interruption, so there is no loss between processes, there is no mis-insertion of core metal, Defects can be prevented, there is no time loss and the molding time is increased, and the punching and bending process A allows easy and reliable positioning when molding the seal member, and the cutting process D allows easy and reliable punching. 19 is also a connecting piece 1
This is an ideal manufacturing method that allows continuous mass production by simply cutting off the seal portion 11 without worrying about damaging the seal portion 11.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional method of manufacturing a bearing sealant. FIG. 2 is a manufacturing process showing a method for manufacturing a bearing sealing material of the present invention. FIG. 3 is a plan view of a metal plate for a core bar which has been punched and bent in the punching and bending step A of the present invention. FIG. 4 is a sectional view taken along line a-a' in FIG. FIG. 5 is a sectional view of the molding step C of the present invention. FIG. 6 is a sectional view of the punching process D of the present invention. FIG. 7 is a cross-sectional view of the present invention. FIG. 8 is a plan view of a metal plate for a core metal according to an embodiment of the present invention. FIG. 9 is a plan view of a metal plate for a core metal according to another embodiment of the present invention. 10th
The figure is a plan view of a bearing sealing material according to another embodiment of the present invention. A1...Punching process, A2...Bending process, B
... Adhesive application process, C ... Molding process, D ... Punching process, E ... Sealing material for bearing, 5 ... Metal plate for core metal, 6 ... Hole, 7 ... Adhesive application roller, 8
...Drying, baking machine, 10...Molding mold, 11...
Elastic body, 12... Connecting piece, 14... Punch, 15
...Slit, 18...Ponchi.

Claims (1)

[Claims] 1 Continuously drill desired holes in the strip-shaped core metal plate, punch out the outline of the portion that will become the outer periphery of the bearing sealing material, and when bending the desired location, A process of punching and bending so as to provide at least one connecting piece that connects the metal plate for the core; A process of applying an adhesive to the metal plate for the core, followed by drying and baking; and an adhesive. Based on the hole made in the core metal plate coated with
A step of supplying an elastic body such as synthetic rubber or synthetic resin and baking or shaping it into a desired shape using upper and lower molds to form a seal; and providing the seal on the metal plate for the core metal formed with the seal. A method for manufacturing a bearing sealing material, which comprises successively combining the steps of cutting a connecting piece that is attached to the bearing sealing material and separating a desired bearing sealing material to obtain a bearing sealing material.