JP3483392B2 - Roller manufacturing method and manufacturing apparatus using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller manufacturing method including a rotary shaft member having an outer peripheral surface on which a coating layer is formed, and a manufacturing apparatus using the same.

[0002]

2. Description of the Related Art In a fixing device of a copying machine or an electrostatic recording device, a pair of rollers are provided,
Transfer paper to which toner is attached is passed between the rollers to fix the toner to the transfer paper. For example, as shown in FIG. 8, such a roller has a coating layer 3 made of a rubber material, for example, silicon rubber, having a predetermined thickness on the outer peripheral surface, and a pair of journals rotatably supported. The rotary shaft member 5 includes parts 5a and 5b and a cylindrical part 5d that connects the journal parts 5a and 5b to each other.

In manufacturing such a roller, for example, a manufacturing apparatus as shown in FIG. 8 is used. Note that FIG. 8 shows a state in which the rotary shaft member 5 is arranged inside the manufacturing apparatus 7 and the silicone rubber MS as a molding material is injected.

The manufacturing apparatus 7 is equipped with the injected silicone rubber M.
One of the mold 21 and a heating device 9 that heats S for a predetermined time, a cylindrical mold 21 that is arranged inside the heating device 9 and is provided to face the outer peripheral surface of the cylindrical portion 5d of the rotary shaft member 5, The journal portion 5 of the rotary shaft member 5 while being fitted to the end portion of the
a mold 11 having a bottomed hole 11a fitted to a and a rotary shaft member 5 fitted to the other end of the mold 21.
Mold 13 having a bottomed hole 13a fitted in the journal portion 5b of the mold, and the mold 1 along the axial direction of the rotary shaft member 5.
It is provided with a cylinder portion 19 that presses the mold 13 toward the first side via the pressing member 17.

The heating device 9 is composed of two members which are arranged so as to face each other and can be divided.
A heater as a heating means is provided in each member. Further, a plate-like member 15 having an injection hole 15a connected to one end of the supply pipe PS is provided at one end of the heating device 9 where the mold 11 is arranged in a state of being in contact with the mold 11. There is.

The mold 11 has an injection hole 15a in the plate member 15.
The molding material supplied from the columnar portion 5d of the rotary shaft member 5
In the space between the outer peripheral surface of the mold and the inner peripheral surface of the mold 21, that is, a plurality of introducing nozzles 11n for guiding to the coating layer forming portion are provided along the circumferential direction. One end surface of the mold 11 is in contact with one end of the plate member 15, and the other end surface of the mold 11 is in contact with one end surface of the cylindrical portion 5d of the rotary shaft member 5.

The mold 13 has a cylindrical portion 5d of the rotary shaft member 5.
One or a plurality of discharge nozzles 13n for discharging a small amount of the molding material overflowing from the space between the outer peripheral surface of the mold and the inner peripheral surface of the mold 21 to the recess 17a of the pressing member 17 along the circumferential direction. I have one. One end surface of the mold 13 contacts one end of the pressing member 17, and the other end surface of the mold 13 is
The rotary shaft member 5 is in contact with the other end surface of the cylindrical portion 5d. The pressing member 17 includes a rod portion 19a of the cylinder portion 19.
Are linked to.

With such a structure, the rotary shaft member 5 is disposed inside the manufacturing apparatus 7 to inject the molding material into the injection hole 15a,
In addition, when injecting at a predetermined pressure through the introduction nozzle 11n, the cylinder portion 19 is activated in advance and the rod portion 19a thereof is extended in the direction indicated by the arrow P in FIG. As a result, the pressing member 17 presses the mold 13 toward the cylindrical portion 5d side of the rotary shaft member 5 with a pressure larger than the injection pressure of the molding material, and the mold 11 causes the rotary shaft member 5 to have a circular shape. The columnar portion 5d presses the plate member 15 side. As a result, the other end surface of the mold 11 is brought into close contact with one end surface of the cylindrical portion 5d of the rotary shaft member 5 without a gap, and the other end surface of the mold 13 is connected to the cylindrical portion 5d of the rotary shaft member 5. It is closely attached to the other end face of the. As a result, a part of the molding material causes a gap between the inner peripheral surface of the hole 11a of the mold 11 and the outer peripheral surface of the journal portion 5a,
Alternatively, it is possible to avoid a situation in which it flows into the gap between the inner peripheral surface of the hole 13a of the mold 13 and the outer peripheral surface of the journal portion 5b, and it becomes a burr after the molding and adheres.

FIG. 9 shows a mold for manufacturing the roller as described above without providing the cylinder portion 19 and the pressing member 17 as shown in FIG. The structure is similar to that of the heating device 9 shown in FIG. FIG. 9 shows a state in which the rotary shaft member 5 is arranged inside the mold and the molding material 9 is injected.

The mold shown in FIG. 9 is fitted to a cylindrical mold 31 provided facing the outer peripheral surface of the cylindrical portion 5d of the rotary shaft member 5 and a journal portion 5a of the rotary shaft member 5. The bottomed hole 29a fitted into the journal portion 5b of the rotary shaft member 5, and the bottomed hole 27a fitted into the inner peripheral portion of one end of the mold 31. The mold 29 has a mold 29 fitted to the inner peripheral portion of the other end of the mold 31 and an injection hole 23a to which one end of the supply pipe PS is connected.
The mold 23 screwed to the male screw portion of the outer peripheral portion at one end of the mold 31 via the mold 27, and the mold 29 to the male screw portion of the outer peripheral portion at the other end of the mold 31. And a die 25 that is screwed through.

The mold 27 has an injection hole 23a in the plate member 23.
The molding material supplied from the columnar portion 5d of the rotary shaft member 5
In the space between the outer peripheral surface of the mold 31 and the inner peripheral surface of the mold 31, that is, a plurality of introducing nozzles 27n for guiding to the coating layer forming portion are provided along the circumferential direction. One end surface of the mold 27 is the mold 2
3, and the other end surface of the die 27 is in contact with one end surface of the cylindrical portion 5d of the rotary shaft member 5. Further, a ring-shaped groove 27b is provided on the other end surface of the die 27. O in the groove 27b
A ring 33 is arranged.

The mold 29 is a cylindrical portion 5d of the rotary shaft member 5.
Has a plurality of discharge nozzles 29n along the circumferential direction for discharging a small amount of the molding material overflowing from the space between the outer peripheral surface of the mold 31 and the inner peripheral surface of the mold 31 into the recess of the mold 25. ing. One end surface of the die 29 abuts on a step portion of the inner peripheral portion of the die 25, and the other end surface of the die 29 abuts on the other end surface of the cylindrical portion 5d of the rotary shaft member 5. ing. Further, a ring-shaped groove 29b is provided on the other end surface of the mold 29. An O-ring 35 is arranged in the groove 29b.

With this structure, the rotary shaft member 5 is arranged inside the mold, and the molding material is injected into the coating layer forming portion through the injection hole 23a and the introducing nozzle 27n at a predetermined pressure. At this time, the other end surface of the mold 27 and the cylindrical portion 5d of the rotary shaft member 5 are caused by the O-rings 33 and 35.
The gap between the one end face and the other end face of the mold 29 and the other end face of the cylindrical portion 5d of the rotary shaft member 5 is sealed. As a result, it is possible to avoid a situation in which a part of the molding material flows into each gap and becomes a burr after molding and adheres as in the above-described example.

[0014]

However, in the manufacturing apparatus shown in FIG. 8, since the cylinder portion 19 and the pressing member 17 are provided, the structure becomes complicated and the apparatus may become large in size. Further, in the mold shown in FIG. 9, the other end surface of the mold 27 and one of the cylindrical parts 5d of the rotary shaft member 5 are different due to the variation in the axial length of the cylindrical part 5d of the rotary shaft member 5. A gap between the end face, and the other end face of the mold 29 and the cylindrical portion 5 of the rotary shaft member 5.
There is a possibility that a gap may be formed between the other end surface of d and a part of the molding material may flow into the gap to cause burrs. Furthermore, FIG.
In the mold shown in FIG. 3, when the molding material is heated, the difference between the linear expansion coefficient of the rotary shaft member 5 and the linear expansion coefficient of the mold 31 causes the other end surface of the mold 27 and the circle of the rotary shaft member 5 to move. A gap is formed between one end face of the columnar portion 5d and another end face of the die 29 and the other end face of the cylindrical portion 5d of the rotary shaft member 5, and a part of the molding material flows into the gap. There is a risk. Then, there is a risk that the rotary shaft member 5 is bent by thermal stress corresponding to the difference between the linear expansion coefficient of the rotary shaft member 5 and the linear expansion coefficient of the mold 31.

In consideration of the above problems, the present invention is a method for manufacturing a roller having a rotary shaft member having an outer peripheral surface on which a coating layer is formed, and a manufacturing apparatus using the roller, which are molded. It is an object of the present invention to provide a roller manufacturing method capable of simplifying the structure of the manufacturing apparatus without causing undesired burrs to be attached to the rotary shaft member of the roller, and a manufacturing apparatus using the same. .

[0016]

In order to achieve the above-mentioned object, in the method for manufacturing a roller according to the present invention, a coating layer is formed at a predetermined position inside a molding die for molding the coating layer of the roller. A rotary shaft member having an outer peripheral surface which is supported by a journal portion which is continuous with the outer peripheral surface is arranged, and at least one end surface of both end surfaces which cross the outer peripheral surface of the rotary shaft member in the radial direction is arranged. Separation
The first contact surface that is in a closed state or in a close state, and
Sliding contact with the surface of the molding die that communicates with the internal
A step of arranging an annular seal member having a second contact surface, and a space formed between the outer peripheral surface of the rotary shaft member and the inner peripheral surface of the molding die through the supply path of the seal member. A step of injecting the molding material and pressing the first contact surface of the seal member toward one end surface to heat the injected molding material directly or indirectly; After the molding material is cooled, a step of obtaining a roller member in which the coating layer is formed on the outer peripheral surface is obtained.

The roller manufacturing apparatus according to the present invention includes a rotary shaft member housing in which a rotary shaft member having an outer peripheral surface on which a coating layer is formed and supported through a journal portion provided in series with the outer peripheral surface is arranged. And a molding die in which the coating layer forming portion is formed between the inner peripheral surface of the rotating shaft member housing portion and the outer peripheral surface of the rotating shaft member, and is arranged adjacent to the coating layer forming portion, state spaced against at least one end face of the end faces across the outer peripheral surface of the rotary shaft member along the radial or
An annular seal member having a first contact surface that is in close proximity and a second contact surface that is in sliding contact with the surface of the molding die that communicates with the journal portion; Introducing passage forming section for introducing the molding material for forming the covering layer into the covering layer forming section of the mold in a state of pressing the first contact surface of the sealing member toward one end surface through the supply path of the sealing member . When,
And a heating means for directly or indirectly heating the molding material supplied to the coating layer forming portion.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 4 shows a roller obtained by applying an example of the roller manufacturing method according to the present invention.

In FIG. 4, the roller 35 has a coating layer 37 made of a rubber material, for example, silicon rubber, having a predetermined thickness on the outer peripheral surface thereof, and a pair of rotatably supported journal portions 39a and 39b. , A columnar portion 39d connecting the journal portions 39a and 39b to each other, and a rotary shaft member 39 made of carbon steel, for example.

FIG. 1 shows the schematic construction of a first embodiment of a roller manufacturing apparatus according to the present invention. It should be noted that FIG. 1 shows a state in which the rotary shaft member 39 is arranged inside the mold described later.

In FIG. 1, the present apparatus has a rotary shaft member 39.
A predetermined distance on the outer peripheral surface of the cylindrical portion 39d of, for example, about 2
A metal mold 41 having a bottom and a bottomed hole 47a to be fitted into the journal 39a of the rotary shaft member 39 and a cylindrical mold 41 which is provided to face each other and is surrounded by the cylindrical part 39d.
A mold 47 fitted to one end of the rotary shaft member 39
Mold 49 having a bottomed hole 49a fitted to the journal portion 39b of the mold 41 and fitted to the other end of the mold 41, and a male provided on the outer peripheral portion at one end of the mold 41. A cylindrical mold 43 having a female screw part 43a screwed into the screw part 41a and fixing the mold 47 to one end of the mold 41;
The die 4 has a female screw portion 45a screwed into a male screw portion 41b provided on the outer peripheral portion of the other end portion of the die 41.
Cylindrical mold 45 for fixing 9 to the other end of the mold 41
It has and.

Further, the present apparatus covers the mold 43, the mold 41, and the mold 45 and heats the molding material.
7 and, in addition, an annular seal member 51 disposed between one end surface of the cylindrical portion 39d of the rotary shaft member 39 and an intermediate cylindrical portion 47B of the mold 47 described later. There is.

The mold 41 is made of, for example, carbon steel and has an inner peripheral surface forming the outer peripheral surface of the coating layer 37 of the roller 35. The inner peripheral surface is surface-finished by honing. The female screw portion 43a of the die 43 is screwed into the male screw portion 41a at one opening end of the die 41. Further, the inner peripheral surface of the mold 41 and the rotary shaft member 39
An inner space as a coating layer forming portion is formed between the columnar portion 39d and the columnar portion 39d.

The mold 43 is made of carbon steel, for example, and has a screw hole 43s for injection to which the supply pipe PS or the blind plug 75 is selectively connected. Screw hole 43
One open end of s opens to a recess 43b formed inside. Between the recess 43b and the female screw portion 43a, a step portion 43c with which one end surface of the mold 47 contacts is provided.

The mold 47 is made of, for example, carbon steel, and one end surface of the large cylinder portion 4 abuts on the stepped portion 43c of the mold 43.
7A and a middle cylindrical portion 47B fitted to the inner peripheral portion of the mold 41
And a small cylindrical portion 47C.

The other end surface of the large cylindrical portion 47A is in contact with one end surface of the mold 41. As a result, the mold 47 is restricted from moving along the axial direction by the mold 43, and the mold 4 is
It will be fixed to one end face of 1. Further, a predetermined gap is provided along the radial direction between the outer peripheral surface of the large cylindrical portion 47A and the inner peripheral surface of the step portion 43c of the mold 43.

The other end surface of the large cylindrical portion 47A and the middle cylindrical portion 4
An introduction nozzle 47n is provided between the end surface of 7B and the end surface of 7B. Introduction nozzle 47
A plurality of n, for example 6 to 8, are provided at a predetermined interval along the circumferential direction. Each introduction nozzle 47n
One end of each of the introduction nozzles 47n is open to the recess 43b of the mold 43, and the other end of each of the introduction nozzles 47n is located between the inner periphery of the mold 41 and the outer periphery of the small cylindrical portion 43C. It opens into a ring-shaped space. The cross-sectional shape of each introduction nozzle 47n along the axial direction is tapered, and each introduction nozzle 4n
The diameter of the other end of 7n is shorter than the diameter of the other end.

A predetermined gap is provided between the tip of the small cylindrical portion 47C and one end surface of the cylindrical portion 39d of the rotary shaft member 39. The clearance is set so that thermal stress does not act on the rotary shaft member 39 according to the linear expansion coefficient of the rotary shaft member 39 and the mold 47. Further, a bottomed hole 47a into which the journal portion 39a of the rotary shaft member 39 is fitted is provided inside the die 47.

The inner peripheral portion of the die 41 and the small cylindrical portion 4 of the die 47
An annular seal member 51 is arranged in the ring-shaped space between the outer peripheral portion of 7C. The seal member 51 is made of, for example, carbon steel, and has a cylindrical portion 39d of the rotary shaft member 39.
Has a first contact surface 51A selectively contacting one end surface of the mold 47 and a second contact surface 51B slidingly contacting the outer peripheral surface of the small cylindrical portion 47C of the mold 47. . When the molding material is not injected into the mold 41, the first contact surface 51A is provided on one side of the cylindrical portion 39d of the rotary shaft member 39 as shown in FIGS. 1 and 2A. It can be separated from or close to the end face. FIG. 2A shows a partially enlarged view of the area TA in FIG. The cross-sectional area between the inner peripheral portion of the die 41 and the outer peripheral portion of the small cylindrical portion 47C of the die 47 is between the inner peripheral surface of the die 41 and the outer peripheral surface of the cylindrical portion 39d of the rotary shaft member 39. It is said to be larger than the cross-sectional area of. The cross-sectional area between the inner peripheral portion of the die 41 and the outer peripheral portion of the small cylindrical portion 47C of the die 47 is, for example, the inner peripheral surface of the die 41 and the outer peripheral surface of the cylindrical portion 39d of the rotary shaft member 39. It is about 1.2 times the cross-sectional area between. Accordingly, even if the molding material 59 thermally expands during heating, a force is always applied to the seal member 51 in the direction in which the seal member 51 is pressed against the end surface of the rotary shaft member 39.

Further, the outer peripheral portion of the seal member 51, and
As shown in FIGS. 1 and 2A, the inner peripheral portion is provided with groove portions 51g and 51n, respectively.

The grooves 51g and 51n are respectively provided with
For example, O-rings 53 and 55 made of fluorine-based rubber or silicon-based rubber are arranged.

Furthermore, a plurality of, for example, 6 to 8, a plurality of, for example, 6 to 8, inner diameters of the groove 51g of the seal member 51 are arranged at a predetermined interval along the circumferential direction, and have a relatively small diameter, for example, a diameter of about 1 mm. Is provided with a supply path 51a. One opening end of the supply path 51a has a first contact surface 51.
The other opening end of the supply path 51a is opened to A, and the other opening end is opened to the surface facing the first contact surface 51A.

As a result, the inner peripheral portion of the mold 41 and the mold 47 are
The ring-shaped space between the outer peripheral portion of the small cylindrical portion 47C and the space between the outer peripheral portion of the cylindrical portion 39d of the rotary shaft member 39 and the inner peripheral portion of the mold 41 communicate with each other only through the supply passage 51a. To be in a state. The screw hole 43s, the recess 43b, the introduction nozzle 47n, and the supply passage 51a form an introduction passage forming portion.

On the other hand, the female screw portion 45a of the die 45 is screwed into the male screw portion 41b at the other open end of the die 41.

The mold 45 is made of, for example, carbon steel and has a recess 45b having a predetermined volume inside. A step portion 45c with which one end surface of the mold 49 abuts is provided between the recess 45b and the female screw portion 45a.

The die 49 is made of, for example, carbon steel, and one end face of the large cylindrical portion 4 is in contact with the step portion 45c of the die 45.
9A and a small cylindrical portion 49B fitted to the inner peripheral portion of the mold 41.
It consists of and.

The other end surface of the large cylindrical portion 49A has a mold 41.
Is in contact with one of the end faces. With this, the mold 49
The movement of the mold along the axial direction is restricted by the mold 45, and the mold is fixed to the other end surface of the mold 41. Further, a predetermined gap is provided along the radial direction between the outer peripheral surface of the large cylindrical portion 49A and the inner peripheral surface of the step portion 45c of the mold 45.

One end surface of the large cylindrical portion 49A and the small cylindrical portion 4
A discharge nozzle 49n is provided between the end surface of 9B and the end surface of 9B.

A plurality of discharge nozzles 49n are provided along the circumferential direction at predetermined intervals, for example, two to four. One end of each discharge nozzle 49n has a mold 4
5 to the concave portion 45b, and each discharge nozzle 49n.
The other end is open to a ring-shaped space between the inner peripheral portion of the mold 41 and the outer peripheral portion of the cylindrical portion 39d of the rotary shaft member 39, that is, to the coating layer forming portion. Each discharge nozzle 49
The cross-sectional shape of the n along the axial direction is tapered, and the diameter of the other end of each discharge nozzle 49n is shorter than the diameter of the one end. This is to minimize the burr generated on the end surface of the coating layer 37 to be formed and to apply the back pressure.

The tip of the small cylindrical portion 49B has a rotary shaft member 39.
Is in contact with the other end surface of the cylindrical portion 39d. Further, a bottomed hole 49a into which the journal portion 39b of the rotary shaft member 39 is fitted is provided inside the mold 49.

In manufacturing the roller 35 with such a structure, first, an adhesive is applied to the surface of the cylindrical portion 39d of the rotary shaft member 39, and then the journal portion 39b thereof.
Is fitted in the hole 49a of the mold 49, and the seal member 51 is arranged on the outer peripheral portion of the small cylindrical portion 47C of the mold 47 with its first contact surface 51A facing the cylindrical portion 39d side. The obtained product is fitted into the mold 41.

Then, the mold 49 and the rotary shaft member 39.
Is inserted and arranged from the male screw part 41b side of the mold 41, and the journal part 39a is fitted into the hole 47a.

As a result, the journal portions 39a and 39b of the rotary shaft member 39 are inserted into the holes 47 of the die 47, respectively.
a, the hole 49a of the die 49 is fitted and supported.

At this time, as shown in FIG.
Female screw portion 45a of the die 41 is screwed to the male screw portion 41b of the die 41, and the female screw portion 43a of the die 43 is screwed to the male screw portion 41a of the die 41 so that the dies 47 and 49 are made of metal. Mold 41
Will be fixed to both ends of each.

Subsequently, when the molds 41, 45, and 43 are arranged in the heating device 57, when one end of the supply pipe PS is connected to the female screw portion 43s of the mold 43, the molding material is formed. 59, for example, a low-temperature curable silicone rubber having a relatively low viscosity is injected into the recess 43b of the mold 43 at a predetermined pressure, for example, 50 kgf / cm ² in a predetermined amount. The molding material 59 is previously deaerated by stirring or the like.

As a result, as shown in FIG. 3, the molding material 59 flows from the recess 43b through the respective introduction nozzles 47n between the inner peripheral portion of the mold 41 and the outer peripheral portion of the small cylindrical portion 47C of the mold 47. It is guided and presses the seal member 51 against the end face of the rotary shaft member 39, and between the outer peripheral surface of the cylindrical portion 39d of the rotary shaft member 39 and the inner peripheral surface of the mold 41 through each supply passage 51a of the seal member 51. Will be introduced into the space. The molding material overflowing from the space between the outer peripheral surface of the cylindrical portion 39d of the rotary shaft member 39 and the inner peripheral surface of the mold 41 is discharged into the recess 45b through the discharge nozzle 49n of the mold 49. .

At this time, the molding material 59 does not leak out through the male screw portions 41a and 41b of the mold 41 due to the fastening torque in the molds 43 and 45 and the viscosity of the molding material. Further, as shown in FIG. 2B and FIG. 3, the first contact surface 5 of the seal member 51 is
1A is moved by the pressing force of the molding material introduced through each of the introduction nozzles 47n, and is brought into close contact with one end face of the cylindrical portion 39d of the rotary shaft member 39 from a separated state. Further, instead of the supply pipe PS, the blind plug 75 is screwed into the female screw portion 43s.

As a result, when the molding material 59 is heated, reduction of the pressure applied to the first contact surface 51A of the seal member 51 is avoided, and as a result, after molding, burrs of the coating layer 37 are prevented. Occurrence will be avoided. Also,
In the state where the gap between the inner peripheral portion of the seal member 51 and the outer peripheral portion of the small cylindrical portion 47C of the mold 47 is sealed by the O-ring 55 and the first contact surface 51A of the seal member 51 has no gap. Since it contacts one end surface of the cylindrical portion 39d , the outer peripheral surface of the cylindrical portion 39d of the rotary shaft member 39 and the inner peripheral surface of the mold 41 are hermetically sealed.

Subsequently, the heating device 57 is activated and the injected molding material 59 is heated, for example, at 120 ° C. for 30 minutes. At that time, even when the columnar portion 39d of the rotary shaft member 39 expands due to heat, the rotary shaft member 39 is expandable together with the seal member 51, so that the rotary shaft member 39 is not bent by thermal stress, and the seal member 51 is Since it is pressed against the end surface of the rotary shaft member 39 as described above, there is no possibility that the molding material 59 leaks to the outer peripheral portion of the journal portion 39a.

After the molding material 59 is cooled and hardened, the molds 41, 45, and 43 are taken out from the heating device 57, and then the molds 43 and 45 are removed from the mold 41 and the molds are removed. The roll 35 on which the coating layer 37 is formed is taken out from the inside of 41 and obtained.

FIG. 5 shows a second embodiment of a manufacturing apparatus to which the roll manufacturing method according to the present invention is applied.

In FIG. 5, in the example shown in FIG.
The screw holes 43s of the die 43 are parallel threads, but instead, the die 61 is provided with a tapered screw hole 61s. In FIG. 5 and other examples described later, the attached heating device 57 is not shown, and
The same components as those shown in FIG. 1 are designated by the same reference numerals, and the duplicate description thereof will be omitted.

The mold 61 is made of, for example, carbon steel and has a tapered screw hole 61s for injection to which the supply pipe PS is selectively connected. One open end of the screw hole 61s opens into a recess 61b formed inside.
A step 61c with which one end surface of the mold 47 abuts is provided between the recess 61b and the female screw 61a. The cross-sectional area of the opening end of one of the screw holes 61s is set to be smaller than the total cross-sectional area of the supply passage 51a of the seal member 51. The cross-sectional area of the opening end of one of the screw holes 61s is, for example, 30 mm ^2.
The total cross-sectional area of the supply path 51a is, for example, 60 mm ² .

Thus, after the molding material 59 is poured into the mold 41, when the molding material is heated, it acts on the first contact surface 51A of the seal member 51 without using a blind plug. Pressure reduction is avoided, resulting in
The occurrence of burrs on the coating layer 37 due to the pressure reduction is avoided. In addition, in addition to the tapered screw hole 6
In the case where the blind hole 63s having the male screw portion that is screwed into the 1s is used to close the screw hole 61s, the internal pressure is surely maintained at a predetermined value after the injection of the molding material 59. Becomes

FIG. 6 shows a third embodiment of a manufacturing apparatus to which the roll manufacturing method according to the present invention is applied.

6, in the example shown in FIG. 1, an annular seal member is provided in the ring-shaped space between the inner peripheral portion of the mold 41 and the outer peripheral portion of the small cylindrical portion 47C of the mold 47. 51 is arranged, and the introduced molding material 59 is supplied to each of the supply paths 51a.
Is introduced into the space between the outer peripheral surface of the cylindrical portion 39d of the rotary shaft member 39 and the inner peripheral surface of the mold 41, and the outer peripheral surface of the cylindrical portion 39d of the rotary shaft member 39 and the mold 41. The molding material overflowing from the space between the inner peripheral surface and the mold 4 directly
9 is introduced into the discharge nozzle 49n and discharged through the discharge nozzle 49n into the recess 45b. Instead, the inner peripheral portion of the mold 41 and the small cylindrical portion 47C of the mold 47 are replaced.
In the ring-shaped space between the outer periphery of the seal member 65 and
The O-ring 67 and the O-ring 67 are arranged side by side, respectively, and the introduced molding material 59 passes through the gap between the outer peripheral portion of the seal member 65 and the inner peripheral portion of the mold 41 to form the cylindrical portion 3 of the rotary shaft member 39.
It is introduced into the space between the outer peripheral surface of 9d and the inner peripheral surface of the mold 41. The molding material overflowing from the space between the outer peripheral surface of the cylindrical portion 39d of the rotary shaft member 39 and the inner peripheral surface of the mold 41 is the outer periphery of the dam 69b formed at one end of the mold 69. It is introduced into the discharge nozzle 49n through a gap between the portion and the inner peripheral portion of the mold 41 and discharged.

In FIG. 6, the seal member 65 is made of, for example, an annular carbon steel, and is a first contact surface forcibly contacted with one end surface of the cylindrical portion 39d of the rotary shaft member 39. 65A and a second contact surface 65B that is in sliding contact with the outer peripheral surface of the small cylindrical portion 47C of the mold 47 on the inner peripheral portion. The first abutment surface 65A is formed by the elastic force of the O-ring 67 even when the molding material is not injected into the mold 41.
As shown in FIG. 6, one end face of the cylindrical portion 39d of the rotary shaft member 39 is abutted. In addition, the seal member 6
On the outer peripheral surface of 5, a conical inclined surface portion 65C having a predetermined angle with respect to the first contact surface 65A is formed. Further, a predetermined gap is provided between the outer peripheral surface of the seal member 65 and the inner peripheral surface of the mold 41.

An O-ring 67 is provided in the small cylindrical portion 47C adjacent to the seal member 65. O-ring 67
Is made of, for example, fluorine rubber.

Further, as in the previous embodiment, the cross-sectional area between the inner peripheral surface of the mold 41 and the outer peripheral portion of the O-ring 67 is the inner peripheral surface of the mold 41 and the outer periphery of the cylindrical portion 39 of the rotary shaft member 39. It is said to be larger than the cross-sectional area of the surface. This ratio is set for the same reason as the above example.

As a result, when the molding material 59 is supplied through the introduction nozzle 47n, the molding material 59 runs along the inclined surface portion 65C to form a gap between the outer peripheral surface of the seal member 65 and the inner peripheral surface of the mold 41. Is introduced between the outer peripheral portion of the columnar portion 39d and the inner peripheral portion of the mold 41.

The die 69 is made of, for example, carbon steel, and one end face of the large cylindrical portion 6 is in contact with the step portion 45c of the die 45.
9A and a small cylindrical portion 69B fitted to the inner peripheral portion of the mold 41.
It consists of and.

The other end surface of the large cylindrical portion 69A is in contact with one end surface of the mold 41. As a result, the die 69 is fixed to the other end surface of the die 41 by the movement of the die 45 along the axial direction being restricted. Further, a predetermined gap is provided along the radial direction between the outer peripheral surface of the large cylindrical portion 69A and the inner peripheral surface of the step portion 45c of the mold 45.

The end surface of the small cylindrical portion 69B has a large cylindrical portion 69A.
Is formed substantially parallel to the other end face of the small cylindrical portion 69B, and a weir portion 69b having substantially the same diameter is extended to the tip of the small cylindrical portion 69B connected to the end face.

The dam portion 69b has a conical slant surface portion, which has a predetermined slope with respect to a surface contacting one end surface of the cylindrical portion 39d of the rotary shaft member 39, on the outer peripheral portion. Weir 69b
A predetermined gap is formed between the outer peripheral portion of the end surface of the mold and the inner peripheral portion of the mold 41.

As a result, the molding material 59 is applied to the rotary shaft member 3
9 is injected into the outer peripheral portion of the cylindrical portion 39d and the inner peripheral portion of the mold 41, the molding material 59 flows while pressing the seal member 65 against one end surface of the cylindrical portion 39d of the rotary shaft member 39, The slope portion is connected through the predetermined gap between the outer peripheral portion of the end surface of the weir portion 69b and the inner peripheral portion of the mold 41 to reach the end surface of the small cylindrical portion 69B. As a result, formation of burrs on both end surfaces of the formed coating layer 37 can be avoided.

One end surface of the large cylindrical portion 69A and the small cylindrical portion 6
A discharge nozzle 69n is provided between the end surface of 9B and the end surface of 9B. Discharge nozzle 69
A plurality of n, for example, 2 to 4 are provided at a predetermined interval along the circumferential direction. Each discharge nozzle 69n
One end of the die 45 opens to the recess 45b of the die 45, and the other end of each discharge nozzle 69n is a ring between the inner periphery of the die 41 and the slope of the dam 69b. It opens into a space. The cross-sectional shape of each discharge nozzle 69n along the axial direction is tapered, and each discharge nozzle 69n
The other end has a smaller diameter than the one end. This is to apply back pressure.
Further, a bottomed hole 69a into which the journal portion 39b of the rotary shaft member 39 is fitted is provided inside the die 69. Therefore, in this example as well, an undesired burr is not formed on the journal portion 39a in the roll obtained similarly to the above-described example, and further, no burr is formed on both ends of the coating layer 37.

FIG. 7 shows a fourth embodiment of the manufacturing apparatus to which the roll manufacturing method according to the present invention is applied.

In FIG. 7, in the example shown in FIG.
A seal member 65 is provided on the outer peripheral portion of the small cylindrical portion 47C of the mold 47.
An O-ring 67 is provided adjacent to the O-ring 67, but instead of this, a groove 71a is provided in the inner peripheral portion of the seal member 71,
The ring 73 is arranged in the groove portion 71a. Note that, in FIG. 7, the same components as those in the example shown in FIG. 6 are denoted by the same reference numerals, and duplicate description thereof will be omitted.

The seal member 71 is made of, for example, an annular carbon steel, and has a first contact surface 71A that selectively contacts one end surface of the cylindrical portion 39d of the rotary shaft member 39.
The inner peripheral portion has a second contact surface 71B that is in sliding contact with the outer peripheral surface of the small cylindrical portion 47C of the mold 47. First contact surface 7
1A, when the molding material 59 is injected into the mold 41,
Due to the introduction pressure of the molding material 59, the molding material 59 is moved along the axial direction and is brought into contact with one end surface of the cylindrical portion 39d of the rotary shaft member 39 as shown in FIG. Further, a conical inclined surface portion 71C having a predetermined angle with respect to the first contact surface 71A is formed on the outer peripheral surface of the seal member 71. The outer diameter of the seal member 71 is, for example, 39 mm, and the inner diameter of the mold 41 is, for example, 40 mm.

Further, an O-ring 73 is provided in the groove portion 71a formed in the inner peripheral portion of the seal member 71. The O-ring 73 is made of, for example, fluorine rubber. As a result, when the molding material 59 is supplied through the introduction nozzle 47n, the molding material 59 passes through the gap between the outer peripheral surface of the seal member 71 and the inner peripheral surface of the mold 41 by striking the inclined surface portion 71c. Outer peripheral portion of the columnar portion 39d and the mold 4
It is introduced between the inner peripheral part of 1 and.

Therefore, also in this example, in the roll obtained in the same manner as in the above example, undesired burrs are generated in the journal portion 3.
9a without being formed and, for example, a thickness of 1 m
Burrs are not formed on both ends of the coating layer 37 of about m.

In the above example, the molding material is
Although it is pushed in with a predetermined pressure through the screw hole 43s of the die 43, this need not always be the case.
Alternatively, one end of a vacuum pump may be connected to 45, and the molding material may be sucked with a predetermined degree of vacuum and introduced into the mold. Further, in the above example, the introduction nozzle or discharge nozzle, but provided with a plurality, need not necessarily be such in, one by one each introduction nozzle or discharge Nozzle Le It may be provided.

[0073]

As is apparent from the above description, according to the roller manufacturing method of the present invention, at least one of the two end surfaces of the rotary shaft member that crosses the outer peripheral surface in the radial direction is separated from the end surface. In a closed or close state
A molding die that communicates with the first contact surface and the journal portion.
Cyclic and a second abutment surface that is in sliding contact with the portions of the surface
The first contact surface of the seal member is provided on one end surface in the internal space formed between the outer peripheral surface of the rotary shaft member and the inner peripheral surface of the molding die , while the seal member is disposed. Since the molding material is pressed directly and is injected through the supply path of the seal member to heat the molding material directly or indirectly, it is possible to prevent the molding material from leaking to the journal portion. Thereby, burrs do not adhere to the rotary shaft member of the molded roller, and the structure of the manufacturing apparatus can be simplified.

According to the roller manufacturing apparatus of the present invention,
An annular sealing member, disposed on the rotation shaft member accommodating portion, against at least one end face of the end faces across the outer peripheral surface of the rotary shaft member in a radial direction spaced state or
The first contact surface that is in close proximity to the first contact surface and the second contact surface that is in sliding contact with the surface of the molding die that communicates with the journal portion are provided. Since the molding material is introduced through the supply passage of the seal member in a state in which the contact surface of is pressed toward one end surface, the molding material is prevented from leaking to the journal portion. Thereby, burrs do not adhere to the rotary shaft member of the molded roller, and the structure of the manufacturing apparatus can be simplified.

[Brief description of drawings]

FIG. 1 is a schematic configuration sectional view showing a first embodiment of a roll manufacturing apparatus to which a roll manufacturing method according to the present invention is applied.

2A is a sectional view showing a partially enlarged area TA in the example shown in FIG. 1, and FIG. 2B is a partially enlarged sectional view showing the area TA in the example shown in FIG. is there.

FIG. 3 is a cross-sectional view provided for explaining the operation in the example shown in FIG.

FIG. 4 is a cross-sectional view showing a roll obtained by the example shown in FIG.

FIG. 5 is a schematic configuration sectional view showing a second embodiment of a roll manufacturing apparatus to which the roll manufacturing method according to the present invention is applied.

FIG. 6 is a schematic configuration sectional view showing a third embodiment of the roll manufacturing apparatus to which the roll manufacturing method according to the present invention is applied.

FIG. 7 is a schematic configuration sectional view showing a fourth embodiment of the roll manufacturing apparatus to which the roll manufacturing method according to the present invention is applied.

FIG. 8 is a schematic configuration sectional view showing a conventional manufacturing apparatus.

FIG. 9 is a schematic configuration sectional view showing a conventional manufacturing apparatus.

[Explanation of symbols]

35 rolls 37 coating layer 39 Rotating shaft member 39a, 39b Journal section 41,43,47,49,61 Mold 47n, nozzle for introduction 51, 65, 71 Seal member 51a supply path 53, 55, 67, 73 O-ring 57 Heating device 59 Molding material 69b weir

─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideyuki Hatakeyama 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (58) Fields investigated (Int.Cl. ⁷ , DB name) G03G 15/20 103 B29C 45/14 B29C 39/10

Claims (10)

(57) [Claims] 1. A roller is supported at a predetermined position inside a molding die for molding a coating layer of a roller through a journal portion which has an outer peripheral surface on which the coating layer is formed and is continuous with the outer peripheral surface. A rotary shaft member that is disposed and is spaced apart from at least one of the end faces of the rotary shaft member that crosses the outer peripheral surface in the radial direction.
The first contact surface that is in close proximity to the journal
That is in sliding contact with the surface of the molding die that communicates with the
A step of disposing an annular seal member having two contact surfaces, and a supply path of the seal member in a space formed between the outer peripheral surface of the rotary shaft member and the inner peripheral surface of the molding die. A molding material through the first sealing member of the sealing member.
Pressing the contact surface toward the one end face to heat the injected molding material directly or indirectly; and after the heated molding material is cooled, the coating layer is applied to the outer peripheral surface. A process for producing a formed roller member, and a method for producing a roller, which comprises: 2. A roller is supported at a predetermined position inside a molding die for molding a coating layer via a journal portion having an outer peripheral surface on which the coating layer is formed and continuous with the outer peripheral surface. that state spaced against at least one end face of the outer peripheral surface of the rotary shaft member with placing the rotation shaft member end faces crossing along the radial direction also
The first contact surface that is in close proximity to the journal
That is in sliding contact with the surface of the molding die that communicates with the
A step of disposing an annular seal member having two contact surfaces, and a supply path of the seal member in a space formed between the outer peripheral surface of the rotary shaft member and the inner peripheral surface of the molding die. A molding material through the first sealing member of the sealing member.
A step of pressing the contact surface toward the one end surface, and directly or indirectly heating the molding material in a state where the pressure applied to the molding material is maintained at a predetermined value after injection; A step of obtaining a roller member in which the coating layer is formed on the outer peripheral surface after the heated molding material is cooled, and a method for manufacturing a roller. 3. A cross-sectional area of an injection passage that has an opening end portion that opens at the inner peripheral portion of the molding die at one end thereof and that guides the molding material to the inner peripheral portion has a cross-sectional area of the supply passage of the sealing member. The roller manufacturing method according to claim 1 or 2, wherein the roller is smaller than the roller. 4. A roller is supported at a predetermined position inside a molding die for molding a cover layer via a journal portion having an outer peripheral surface on which the cover layer is formed and continuous with the outer peripheral surface. A first abutting contacting at least one end face of both end faces of the rotating shaft member that traverses the outer peripheral surface in the radial direction.
The surface, placing the annular sea <br/> seal member and a second abutment surface that is in sliding contact with the surface of said portion of the mold which communicates with the journal portion, the rotary shaft member Molding material is injected into the space formed between the outer peripheral surface of the molding die and the inner peripheral surface of the molding die through the gap between the outer peripheral surface of the sealing member and the inner peripheral surface of the molding die. Pressing the first abutting surface toward the one end face to directly or indirectly heat the injected molding material; and after the heated molding material is cooled, the coating layer And a step of obtaining a roller member formed on the outer peripheral surface of the roller. 5. A roller is supported at a predetermined position inside a molding die for molding a cover layer via a journal portion having an outer peripheral surface on which the cover layer is formed and continuous with the outer peripheral surface. A first abutting contacting at least one end face of both end faces of the rotating shaft member that traverses the outer peripheral surface in the radial direction.
The surface, placing the annular sea <br/> seal member and a second abutment surface that is in sliding contact with the surface of said portion of the mold which communicates with the journal portion, the rotary shaft member Molding material is injected into the space formed between the outer peripheral surface of the molding die and the inner peripheral surface of the molding die through the gap between the outer peripheral surface of the sealing member and the inner peripheral surface of the molding die. The first contact surface of the molding material is pressed toward the one end surface, and after injection, the molding material is heated directly or indirectly while the pressure applied to the molding material is maintained at a predetermined value. And a step of obtaining a roller member in which the coating layer is formed on the outer peripheral surface after the heated molding material is cooled, the method for producing a roller. 6. A cross-sectional area of an injection passage having an opening end portion which opens at an inner peripheral portion of the molding die at one end thereof and which guides the molding material to the inner peripheral portion is a cross-sectional area of a supply passage of the sealing member. The roller manufacturing method according to claim 4, wherein the roller is smaller than the roller. 7. An outer peripheral surface of the rotary shaft member, which is provided in parallel with a first contact surface of the seal member, and the first contact surface extends along the second contact surface of the seal member. claims, characterized in that the further comprising a biasing member for biasing the at least one end face of the end faces crossing along the radial direction
Item 7. A method for manufacturing a roller according to item 6 . 8. The cross-sectional area of a first contact surface of the seal member, which opposes a space portion formed between an outer peripheral surface of the rotary shaft member and an inner peripheral surface of the molding die, First
8. The method for manufacturing a roller according to claim 1, wherein the roller has a smaller cross-sectional area than a pressure receiving portion that is arranged so as to face the contact surface and is pressed by the molding material. 9. A rotary shaft member accommodating portion in which a rotary shaft member is disposed, the rotary shaft member having an outer peripheral surface on which a coating layer is formed and supported through a journal portion provided in series with the outer peripheral surface, A molding die in which a coating layer forming portion is formed between an inner peripheral surface of the shaft member accommodating portion and an outer peripheral surface of the rotating shaft member, and the rotating shaft member arranged adjacent to the coating layer forming portion. the outer peripheral surface of the end faces at least one against the end face state or close spacing of the traversing along the radial direction in the
The first contact surface in the closed state and the second contact that is in sliding contact with the surface of the portion of the molding die that communicates with the journal portion .
A ring-shaped seal member having a surface , and a coating material for forming the coating layer on the coating layer forming portion of the molding die, the first contact surface of the sealing member through the supply passage of the sealing member . An introducing passage forming portion that is introduced while being pressed toward the one end surface, and a heating unit that directly or indirectly heats the molding material supplied to the coating layer forming portion. Roller manufacturing equipment. 10. A rotary shaft member accommodating portion in which a rotary shaft member is disposed, the rotary shaft member having an outer peripheral surface on which a coating layer is formed and supported via a journal portion provided in series with the outer peripheral surface, A molding die in which a coating layer forming portion is formed between an inner peripheral surface of the shaft member accommodating portion and an outer peripheral surface of the rotating shaft member, and the rotating shaft member arranged adjacent to the coating layer forming portion. A first contact surface that is in contact with at least one end surface of both end surfaces that traverse the outer peripheral surface in the radial direction, and a surface of the molding die portion that communicates with the journal portion.
An annular seal member having a second contact surface that is in sliding contact, and a molding material that forms the coating layer in the coating layer forming portion of the molding die, and an outer peripheral surface of the sealing member and the molding material. The first of the sealing member is provided through a gap between the inner peripheral surface of the mold and
An introduction passage forming portion that introduces the contact surface of the molding material while pressing the contact surface toward the one end surface, and a heating unit that directly or indirectly heats the molding material supplied to the coating layer forming portion. Roller manufacturing device configured as described above.