JPS60201117A - Manufacture of sealing material for bearing - Google Patents

Abstract

PURPOSE:To provide possibility of mass production by furnishing a coupling piece on its sealing side, where the seal of an elastic substance covers, with a brittle portion which is separated from the vessel when the outside circumference is pulled by an external force. CONSTITUTION:When a center hole 6a and periferal circumferential holes 6b, 6c are provided by punching process, a brittle portion 8 is formed by making a notch with a depth and width in such a magnitude as not to cut away coupling piece 7. The reinforcing member 5 of band or flat plate thus provided with a center hole and peripheral circumferential hole 6b as well as a brittle portion 8 at the coupling piece 7 is coated with an adhesive, and then a seal 10b is formed from an elastic substance 10a using an upper 9a and a lower 9b die. The reinforcement core 5a to constitute the seal 10b is retained by pinching its portion to become the sealing A for the bearing with a punch 14 and a cushion 15, and indefinite parts and burrs 11 are separated from the brittle portion 8 by pinching with a push metal 12 and a die 13.

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 6 in the lower mold 2 of a mold for molding a bearing sealant, and then to place synthetic rubber 4 on top of this. After the upper mold 1 is closed, the rubber is heated for a certain period of time to vulcanize the rubber, and then the upper mold 1 is closed.
．． 2 and remove the paris to obtain the desired sealing material for the bearing.0For this reason, the molding process of the core metal and the molding process of the sealant are made in separate processes, so it is possible to insert the core metal incorrectly,
There are cases of defective products due to forgetting to insert them, etc., and since molding is done one by one, even if several molds are lined up and molded at once, it becomes a large fish and cannot be molded continuously, resulting in high costs.
Furthermore, there were drawbacks such as a large amount of loss between processes.

The present invention eliminates these drawbacks and provides a method of manufacturing a bearing sealing material that enables mass production at one time.

When the present invention is explained based on the drawings, as shown in Fig. 2,
The method for producing a sealing material for a bearing according to the present invention is to provide a reinforcing member 5 made of a band-shaped or flat metal-molded N temporary, synthetic resin plate, paper, etc., with a center hole 6a.
and a connecting piece 7 connected to the reinforcing member 5 on the outside of the center hole 6a.
A reinforcing core material 5 for a bearing sealing material having at least one
After punching out an outer peripheral hole 6b for forming the outer peripheral edge of the hole 6a and applying adhesive to the center hole 6a, the outer peripheral hole 6b, and the entire punched reinforcing member 5, as shown in FIG. The connecting piece 7 provided in the reinforcing member 5 is supplied with the material 10a into a mold, forming a plurality of center holes 6a continuously or at once, and then forming a seal portion 10b as shown in FIG. The desired sealing material A for a bearing is shown in FIG.
As shown in FIG. 6, a fragile portion that can be easily cut is formed on the sealing material side of the connecting piece 7 at a portion covered with a sealing portion 10b formed of an elastic material 10b. 8 is a method for manufacturing a bearing sealing material A.

In this manufacturing method, in the step of drilling holes in the reinforcing member 5, as shown in FIG. By punching out a small hole 6C for positioning, the small hole 6c can be accurately positioned with respect to the upper and lower molds 9a and 9b, thereby ensuring molding accuracy.

In addition, when using a belt-shaped plate as the reinforcing member 5, the reinforcing member 5 is continuously punched with desired holes 6a and outer shapes 6b, an adhesive is applied, and molds 9a and 9b are required. The process of forming the seal portion 10'b and the process of separating the bearing sealant A from the reinforcing member 5 are performed in a continuous series, and the bearing sealant A is continuously molded.

On the other hand, when using a flat plate as the reinforcing member 5, the above-mentioned hole punching step, adhesive application step, and the elastic material 10
The process of supplying a, the process of molding the seal part 10b, and the process of separating are each carried out in such a way that a large number of bearing sealants are processed at once on the negative side and then sent to the next process. Mold A accurately.

An important point of the present invention is that, as shown in FIG. 6, the portion covered by the sealing portion 10b of the elastic material 10a on the sealing material side of the connecting piece 7 is vulnerable to being easily separated when the outer peripheral side is pulled by the outside. The purpose is to provide section 8. To explain this point in more detail, as shown in FIG. 2, the weakened portion 8 has a depth or width within a range that prevents the connecting piece 7 from breaking at the same time when punching out the desired center hole 6a and outer peripheral holes 6b and 6c. Since the fragile portion 8 is obtained by making the incision, it can be easily provided without requiring any special process. After applying a desired adhesive to the reinforcing member 5, which has a weakened portion 8 on the connecting piece 7 and has a desired center hole 6tL% outer peripheral hole 6b punched out, a desired adhesive is applied, as shown in FIG. , upper and lower mold sets 9a
・At 9b, seal the desired sealing portion 1o with the elastic material 1oa.
b is formed. As shown in FIG. 5, the reinforcing core material 5'a that forms the seal portion 1°b is held between the punch 14 and the cushion 15 at the part that will become the bearing sealing material A, and the unnecessary part, that is, the reinforcing material to be removed. By sandwiching the member 5 and the spring 11 with the presser metal fitting 12 and the die 16 and shifting their positions up and down, they are torn off at the weak portion 8 of the connecting piece 7.
The bearing sealing material A is separated from the reinforcing member 5 and has a small hole outward from the weak portion 8 as shown in FIG. is enclosed by the seal portion 10b made of the elastic material 10a constituting the bearing sealing material A, and there is no concern that the sealing effect at the outer periphery will be degraded. In addition, unnecessary burrs and the like are discarded together with the unnecessary portions of the reinforcing member 5, and burrs are removed from the bearing sealing material A at the same time, making continuous work easier and enabling mass production.

As described above, in the manufacturing method of the present invention, via the reinforcing member 5,
Bearing sealing material A is obtained continuously or in large numbers at once by combining the following steps: punching process, adhesive application process, elastic material supply process, sealing part molding process, and separation process, but within the same process. The method of action carried out is not a limitation on the invention. That is, in the punching process, the entire surface of the flat reinforcing member 5 is punched out into a desired shape at once, or
The band-shaped reinforcing member 5 may be continuously punched out, and its shape is not particularly limited, and the inner and outer edges may be bent or slit into a desired shape after punching. Next, regarding the method of applying the adhesive, any known method that ensures reliable application, such as spraying, roller application, or application through a liquid bath, may be used, and this is not limited. . Furthermore, in the process of supplying the elastic material 10a to the mold, methods such as simply stacking various shapes such as a flat plate or a plate shaped into a desired shape in advance, or injecting a fluid can be considered. , all the seal parts 1 of the reinforcing member 5
There is no particular limitation as long as it can be supplied appropriately to the 0b modeling section.

In this way, the desired bearing sealing material A is obtained through a series of steps, but even if the order of the punching step and adhesive application step in the manufacturing process is reversed, the structure of the manufacturing method of the present invention will not change. In addition, the reinforcing member 5 is not limited to the metal plate used for conventional core metals, but may also be hard synthetic resin plates, fiber reinforced sheets, paper, etc. According to the invention, in manufacturing sealing materials for bearings, a series of processes from core metal to molding are performed using multi-cavity metal plates, which prevents loss between processes and incorrect or incorrect insertion of core metal, and saves time. The molding time can be significantly shortened without any loss, improving productivity, and there is no need to worry about one end of the reinforcing member protruding toward the outer circumference of the bearing sealant A, reducing the sealing effect, making it different from conventional bearing sealants. This is an excellent manufacturing method that can yield a bearing sealing material with an equivalent structure and excellent sealing performance.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional method of manufacturing a bearing sealant. FIG. 2 is a plan view of a reinforcing member punched in the punching process of the present invention. Figure 6 is &-& of Figure 2.
FIG. FIG. 4 is a sectional view of the molding process of the present invention. FIG. 5 is a cross-sectional view of the process of separating the bearing sealing material from the reinforcing member of the present invention. FIG. 6 is a cross-sectional view of a bearing sealant obtained by the manufacturing method of the present invention.

Claims (1)

[Claims] A reinforcing core material for a bearing sealing material, which has a reinforcing member such as a belt-shaped or flat metal plate, synthetic resin plate, paper, etc., and has a center hole and at least one connecting piece connected to the reinforcing member outside the center hole. An outer circumferential hole for forming the outer circumferential edge is punched out, and a thickener is applied to the reinforcing member from which the center hole and the outer circumferential hole are punched out, if necessary, an elastic material is supplied, and this is inserted into the center hole. After forming seals continuously or in large numbers at once by baking or shaping the upper and lower molds into the desired shape as a reference, the connecting pieces provided on the reinforcing member that formed the seals are separated, and the bearing In a method for manufacturing a sealing material for a tilIl bearing in which a desired sealing material for a bearing is obtained by separating the sealing material from a reinforcing member, a fragile portion that can be easily cut is provided at a portion covered with an elastic material on the sealing material side of the connecting piece. Manufacturing method for a bearing sealing material characterized by the provision of