JP3302261B2 - Roller manufacturing method and manufacturing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as an electrophotographic apparatus and an electrostatic recording apparatus, which is suitable for a fixing device for fixing unfixed toner.
The present invention relates to a method for manufacturing a roller in which an elastic material is formed into a cylindrical shape integrally with the core metal member.

[0002]

2. Description of the Related Art Heretofore, in order to hold a shaft-shaped core metal member concentrically with a cylindrical hole in a molding die having a cylindrical hole penetrating, a mold using lids at both openings of the cylindrical hole. Using a heating platen for heating divided in parallel to the axial direction of the cylindrical molding die and heating (FIG. 7), or a hole in the heating plate so that the cylindrical molding die enters. Then, a hole is formed in the hole and heated (FIG. 8), whereby an elastic material is cylindrically formed around the shaft-shaped core member integrally with the core member to manufacture a roller.

Heretofore, the heating plate for heating has also been made of a metal material because of the strength and thermal conductivity of the mold contact surface. When the cylindrical molding die is sandwiched by such a hot plate, even if the shape of the contact surface of the hot plate is adjusted to the external shape of the cylindrical molding die, the contact portion inevitably becomes linear due to its structure. .

[0004] Further, even when a hole is inserted, the contact portion becomes a line or a point. In other words, the efficiency of heat transfer is reduced, and there is a difference in how the temperature of the molding die rises between the contact part and the part other than the contact part. When the thickness of the elastic layer of the roller is sufficient, there is no difference in the temperature rise of the molding die, but when the thickness is very thin, or when the elastic layer is further molded on the elastic layer, There is a problem that the difference in the temperature rise of the molding die has a large effect, and the difference in the curing time causes a variation in the thickness of the elastic layer, which results in roller runout.

Therefore, there has been a demand for the development of a molding method in which the thickness of the elastic layer does not vary when the elastic layer of the roller is thin or when the elastic layer is further formed on the elastic layer.

In the production of a conventional elastic roller,
As shown in FIG. 9, when a cylindrical molding die is put in a pair of heating plates and covered with the heating plate and subjected to heat molding, the inner diameter of the heating plate is almost the same as the outer diameter of the die, We have to make it a little bigger. However, as a practical matter, the inner diameter of the heating plate is made relatively large in consideration of taking the mold in and out.

[0007] Therefore, when the cylindrical mold is placed in the heating plate, the contact portion between the mold and the heating plate comes into a line contact state, which causes a temperature difference in the mold between the contact portion and the non-contact portion. become. Further, as shown in FIG. 10, the roundness of the cavity portion between the mold and the heating plate was also deformed, thereby affecting the shape accuracy.

[0008]

As described above, in the above conventional example, there is a difference in how the temperature of the molding die rises at the contact portion between the heating plate and the molding die, and the thickness of the elastic layer of the roller is reduced. When the elastic layer is thin, or when an elastic layer is further molded on the elastic layer, the difference in temperature rise of the molding die is large, and the difference in the curing time causes variations in the thickness of the elastic layer, which causes roller runout. Thus, molding using a heating plate of a high-precision thin roller and a multi-layer roller has a large product variation, and it has been difficult to manufacture stably.

According to the present invention, there is provided a heating apparatus which can stably mold with high accuracy without a thickness variation even with a multi-layer roller in which the thickness of the elastic layer is thin or an elastic layer is formed on the elastic layer. Provided is a method for manufacturing a roller using a board in a mold heating method.

Further, the present invention provides a manufacturing apparatus suitable for manufacturing an elastic roller made of a rubber material such as a fixing roller used for an image forming apparatus such as a copying machine and a laser beam printer, and a conveying roller for conveying paper. .

[0011]

Means for Solving the Problems To achieve the above object, a first invention according to the present application is to dispose a shaft-shaped core metal member concentrically with a cylindrical hole in a molding die having a cylindrical hole penetrating therethrough. A cylindrical mold having a lid attached to both end openings of the cylindrical hole for holding and introducing an elastic material such as a silicone rubber material or a urethane rubber material into the cylindrical mold by press-fitting or vacuuming. Heating by a heating hot plate divided in parallel to the axial direction of, around the shaft-shaped core member, in the molding of a roller that is formed integrally with the core member in a cylindrical shape of an elastic material, An urethane rubber or silicone rubber elastic member is provided on a contact surface of the heating hot plate with a molding die.

By disposing an elastic member made of urethane rubber or silicone rubber on the contact surface, the contact portion, which has been inevitably linear or dotted due to its structure because it has been metal-to-metal until now, has the elasticity. The member absorbs both irregularities and comes into contact on the entire side surface of the molding die.

As a result, there is no difference in how the temperature of the molding die rises between the contact portion and the contact portion, and the thickness of the elastic layer is small, or even a multilayer roller in which an elastic layer is formed on the elastic layer is stable. Thus, the heating plate can be molded with high precision without any thickness variation by using a mold heating method.

Further, the invention according to the present application is directed to providing a hole in which the cylindrical molding die is inserted instead of a heating hot plate divided in parallel to the cylindrical molding die axis method. Inside
A hot plate provided with an elastic member of urethane rubber or silicone rubber is used, and the cylindrical mold is pressed into the plate and heated.

Until now, the molding die and the hot plate had to be made large so that the metal would not be galled, and the contact area would be linear or dotted. An elastic material is attached to the inner surface of the heating plate so as to have an inner diameter slightly smaller than the outer diameter, and a molding die is press-fitted therein, so that the elastic member absorbs both irregularities and comes into contact with the entire side surface of the molding die.

As a result, there is no difference in how the temperature of the molding die rises between the contact portion and the other portion, and the thickness of the elastic layer is small, or even a multilayer roller in which an elastic layer is formed on the elastic layer is stable. Therefore, it is possible to form a high-precision and simple hole-type heating plate without variation in wall thickness by using a mold heating method.

The invention according to the present invention also provides a method of applying a primer to a surface of a heating platen on which the elastic member is to be adhered, instead of merely attaching the elastic member to the surface of the molding die. The material of the above-mentioned elastic member is put between the heating plate and the molding die, and then pressed and heated in that state, so that the elastic member which is perfect for the molding die is placed on the contact surface of the heating platen for heating with the heating die. It is characterized in that it is integrally formed.

If the elastic material is simply applied, there is a problem in the durability of the bonding interface and the formation of a contact surface conforming to the side surface shape of the molding die.

However, if the elastic member is integrally formed with the heating plate by the above-described method, the contact interface transfers the side surface of the molding die. Even if the temperature rise is uniform and the thickness of the elastic layer is thin, or even if it is a multi-layer roller where an elastic layer is formed on the elastic layer, the heating plate is stably formed without thickness variation and with a high precision. It can be molded using.

In the invention according to the present application, the above-mentioned elastic member is not simply adhered to the inner surface of the hole in which the molding die of the heating hot plate enters, but a primer is applied to the surface to be adhered and the surface of the molding die is separated. Heat the elastic member that fits the molding die by removing the molding material by inserting the material of the elastic member between the hole and the molding die into the hole of the heating plate and vulcanizing in that state. It is characterized in that it is formed integrally with the heating plate on the contact surface of the hot plate with the molding die.

The above-mentioned elastic member is not simply adhered to the surface of the heating platen on the molding die side, but a primer is applied to the surface to be adhered, and the surface of the molding die is subjected to a mold release treatment. The material of the elastic member is put in between, and the material is pressed and heated in that state, so that an elastic member that fits the molding die is provided on the contact surface of the heating platen with the molding die.

If the elastic material is simply applied, there is a problem in the durability of the bonding interface and the formation of a contact surface conforming to the side surface shape of the molding die. However, if the elastic member is molded integrally with the heating plate by the method described above, the contact interface transfers the molding die side surface, so that the contact surface becomes a tightly fitted elastic member and the temperature of the molding die rises. Mold heating of a simple perforated type heating plate that is uniform and has a small thickness of the elastic layer, or even a multi-layer roller in which an elastic layer is formed on the elastic layer stably with no thickness variation and high accuracy It can be molded by using a method.

The invention according to the present application is characterized in that the elastic member is a silicone rubber. The requirements for an elastic material are that it must have excellent heat resistance and good heat conduction because it is used for a heating panel.From the above, it is degraded even at a heating temperature of more than one hundred and several degrees by using silicone rubber as an elastic member. The thickness of the elastic layer is small by contacting the entire surface of the molding die while maintaining the elasticity without any deformation. Molding can be performed with high precision using a heating plate in a mold heating method.

Further, since the hardness is more easily reduced than urethane rubber, the thickness of the elastic member can be reduced. In other words, the heat conduction efficiency is improved, the molding time can be shortened, or the molding temperature can be lowered, and the durability can be further improved.

The invention according to the present application is characterized in that the elastic member is made of fluoro rubber. The requirement for an elastic material is that it must have excellent heat resistance and good heat conductivity for use in a heating panel.Furthermore, by using fluorine rubber, which is more heat-resistant and stronger than silicone rubber, Retains elasticity without deteriorating even at the heating temperature, and does not break even when the mold is repeatedly inserted and removed, and contacts the entire surface of the molding die so that the thickness of the elastic layer is thin. Even with a multi-layered roller for molding, a heating plate can be formed stably with no thickness variation and using a heating plate in a mold heating method.

Further, the present invention relates to a copying machine, a laser beam
As a device for manufacturing an elastic roller made of an elastic material such as rubber for a fixing roller used for an image forming apparatus such as a printer or a transport roller, a mold having a cavity portion for forming an elastic roller, and heating the mold. The object is achieved by providing a roller manufacturing apparatus in which an elastic member is interposed between heating plates.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 best illustrate the features of the present invention and are cross-sectional views of an apparatus according to the present embodiment, showing how an elastic roller is being formed. Figures 1 and 2
In the figure, reference numeral 10 denotes a molding die having a cylindrical hole 12 therethrough. The cylindrical hole 12 is subjected to a honing finish to secure the accuracy of the outer surface of the elastic roller after molding.

Openings 16 and 1 at both ends of cylindrical hole 12
8 are fitted with lids 20 and 22. Core member 26
Is held concentrically with the inner surface of the cylindrical hole 12 by being fitted into holes 20B and 22B on the central axis of the lid. A lid cover 30 provided with a liquid introduction hole 30 </ b> A communicating with the outside is fitted on the outside of the left lid 20, and is screwed to the molding die 10.

A lid cover 32 for preventing leakage of the elastic material is fitted on the outside of the right lid 22, and is fixed to the molding die 10 by screws. FIG. 1 shows a state in which the elastic material has already been introduced into the mold cavity, and is put into a heating platen 40 for heating which is divided in parallel to the axial direction of the mold, and is heated. State. An elastic material is attached to the hot platen 40 on the contact surface with the molding die. Elastic member 41
Is a 1.5 mm-thick sheet made of urethane rubber stuck with an adhesive.

Next, the procedure of forming an elastic roller using the apparatus of the present embodiment as described above will be described. In this embodiment, an LTV silicone rubber roller having a thickness of 1 mm was molded.

The molding conditions are as follows.

Core material A5052 (JIS) Core member diameter 58 mm Mold member material S45C or NAK55 Mold member diameter 60.05 mm inside diameter, 86 mm outside diameter The diameter of the formed roller is 60 mm. did.

The heating temperature was 120 degrees and the heating time was 30 minutes.

As an LTV silicone rubber material, product code DX35 manufactured by Toray Dow Corning Silicone Co., Ltd.
-446 was used.

First, a core whose periphery is coated with an adhesive beforehand
The right end 26B (left end 26A) of the gold member is 22 (20).
Into the supporting portion 22B.

Next, the assembly assembled as described above is inserted into the cylindrical hole 12 of the molding die 10 from the right (left). The lid 22 (20) is inserted into the opening 18 of the cylindrical hole 12.
(16) It is performed until it comes into close contact with the end face.

Thereafter, another lid 20 (22) is fitted into the left opening (right opening) of the cylindrical hole 12. At this time, the end 26A (26B) of the core metal member 26
Into the hole of the support portion 20B (20A) of the lid 20 (22). Thus, the cylindrical hole 12 becomes a closed space.

Further, the lid cover 32 is fitted on the right side of the right lid 22 of the above assembled object, and the left lid 20
The cover 30 is fitted to the left side of the mold and fixed to the molding die 10 with screws.

In this state, the lid 30 is inserted into the closed space.
A low-viscosity rubber material, for example, an LTV (low-temperature curing type) silicone rubber is injected under pressure from the inlet 30A provided in the cover 20 through the liquid passage of the lid 20. At this time, the LTV rubber is
Before injection, the mixture is stirred and degassed until the liquid is sufficiently mixed. The introduced liquid pressure was 50 kgf / cm ² .

The above-mentioned mold is placed on a hot plate 40 having a 1 mm-thick sheet made of urethane rubber as an elastic member 41 adhered to the contact surface with the molding die with an adhesive, and is heated and cured.

First, the heating platen 40 for heating divided in parallel to the axial direction of the molding die is opened, and the heating platen 40 is closed in a state in which the mold is put into the heating platen, and the heating platen is heated in a state where the elastic member 41 is pressed. Let it. Here, it was put in a hot plate after the liquid was introduced,
It is also possible to introduce the liquid while the mold is assembled and heated by the hot platen 40.

In this embodiment, heating was performed at 120 ° C. for 30 minutes.

After the rubber is cured, the molding die 10 is taken out of the hot platen, and the lids and lid covers at both ends are taken out of the molding die 10 integrally.

Finally, the roller is extracted from the molding die 10 in the same axial direction to obtain an elastic roller. By using such a hot plate and forming by the above-described method, a thin roller having a thickness of 1 mm or less could be formed with high accuracy without a thickness variation.

Similarly, a roller having a thickness of 2 mm is inserted in place of the cored bar, and a two-layer roller for forming a silicone rubber having a thickness of about 1 mm on the surface thereof is formed by the above-mentioned method using such a hot plate. As a result, it was possible to stably mold with high accuracy without thickness variation.

The introduction of the elastic material is independent of the pressure,
It is also possible to evacuate. When an elastic roller having a roller diameter of 60 mm and a rubber layer thickness of 300 μm was formed under the above conditions by the method and the apparatus according to the present embodiment, the thickness unevenness of the formed portion of the roller was 25 μm.

The thickness unevenness when the elastic member 41 according to the present invention is not used is 100 μm, and it is understood that the thickness unevenness is greatly improved.

(Second Embodiment) In this embodiment, as shown in FIGS. 3 and 4 , instead of the heating platen 40 for heating divided in parallel to the axial direction of the molding die, the cylindrical molding die is used. Using a hot plate 42 provided with a hole into which an elastic member 41 was disposed on the inner surface thereof, the cylindrical molding die was press-fitted therein and heated. The elastic member 41 is formed by attaching a 1.5 mm thick sheet made of urethane rubber with an adhesive. In this embodiment, an LTV silicone rubber roller having a thickness of 1 mm was formed. The procedure of forming an elastic roller using the apparatus of the present embodiment is the same as that of the first embodiment except that the cylindrical molding die is press-fitted into a hole of a hot platen 42 having an elastic member 41 disposed on an inner surface thereof and heated. It is.

The hole diameter of the heating plate 42 on which the elastic member 41 is arranged is φ
It was 85.8 mm, and the outer diameter of the cylindrical molding die was φ86 mm. As described above, by using the above-described perforated type heating plate having a simpler structure, a thin roller having a thickness of 1 mm or less could be formed stably with no thickness variation and with high precision.

Similarly, a roller having a thickness of 2 mm is inserted in place of the cored bar, and a two-layer roller for forming a silicone rubber having a thickness of about 1 mm on the surface thereof is formed by the above-mentioned method using such a hot plate. As a result, it was possible to stably mold with high accuracy without thickness variation.

The introduction of the elastic material is independent of the pressure,
It is also possible to evacuate.

(Third Embodiment) This embodiment is different from the first embodiment in that the elastic member 41 is not simply attached to the surface of the heating platen on the forming die side, but a primer is attached to the surface to be attached. The surface of the molding die 10 is coated, and the surface of the molding die 10 is released. The material of the elastic member 41 is put between the heating platen 40 and the molding die 10, and then pressed and heated in that state to heat the elastic member which is perfect for the molding die. The hot platen was formed integrally with the heating platen on the contact surface with the molding die.

In this embodiment, the elastic member 41 is made of urethane rubber and a urethane rubber layer having a thickness of 1.5 mm is formed integrally with the heating plate on the contact surface with the molding die of the heating plate.

First, a primer was applied to the surface of the molding die of the heating hot platen 40, and a release agent was applied to the surface of the molding die 10. With the hot platen 40 in an open state, when closed , the molding die 10 is arranged so as to be exactly at the center, and a large amount of urethane rubber material is charged between the hot platen 40 and the molding die 10 to heat the hot platen. It was closed and heat molded at 110 ° C. for 40 minutes. The reason why the molding temperature is set to 110 ° C. is that when the roller is set to 120 ° C., which is the temperature for actually forming the roller, the elastic member 41 expands more than when 110 ° C. This is for making it adhere to the surface of No. 10 exactly.

After the urethane rubber was cured, the hot platen was opened, the molding die 10 was taken out, and an elastic member 41 fitted to the molding die was formed integrally with the heating platen on the contact surface of the heating platen with the molding die. . In this embodiment, an LTV silicone rubber roller having a thickness of 1 mm was molded.

The procedure for forming the elastic roller using the apparatus of this embodiment is the same as that of the first embodiment. As described above, when the elastic material is simply applied, heat is always applied, so that there is a problem in the durability of the bonding interface or the shape of the side surface of the molding die is not smooth (FIGS. 5 and 6; stepped molding die). Had a problem in forming a contact surface according to its shape, but by using the above-mentioned heating plate, it was possible to stabilize a thin roller with a thickness of 1 mm or less even when using a stepped molding die. As a result, there was no variation in wall thickness and molding was possible with high precision. In addition, the durability of the elastic material bonding interface was improved, and no problem occurred.

Further, similarly, a roller having a thickness of 2 mm is put in place of the cored bar, and a two-layer roller for forming a silicone rubber having a thickness of about 1 mm on the surface thereof is formed by the above-mentioned method using such a hot plate. As a result, it was possible to stably mold with high accuracy without thickness variation.

(Fourth Embodiment) In this embodiment, as in the second embodiment, the sheet of the elastic member 41 is simply placed on the inner surface of the hole of the hot platen 42 provided with a hole for receiving the cylindrical molding die. Instead of attaching with an adhesive, apply a primer to the surface to be attached,
The surface of the molding die 10 is subjected to release treatment, and the heating plate 42 and the molding die 1
The material of the elastic member 41 was put in between 0 and the material was heated in that state, so that an elastic member which was perfect for the molding die was formed integrally with the heating plate on the contact surface of the heating plate for heating with the molding die. . In this embodiment, the elastic member 41 is made of urethane rubber, and a urethane rubber layer having a thickness of 1.5 mm is formed integrally with the heating plate on the contact surface of the heating plate with the molding die.

First, a primer was applied to the inner surface of the hole of the heating hot platen 42, and a mold release agent was applied to the surface of the molding die 10. The molding die 10 was placed just in the center of the hole, and a urethane rubber material was charged between the hole of the hot platen 42 and the molding die 10 and heated at 110 ° C. for 40 minutes.

The molding temperature was set to 110 ° C. when the elastic member 4 was heated to 120 ° C., which is the temperature at which the roller was actually formed.
1 is expanded more than at 110 ° C., and that amount becomes an appropriate compression of the elastic member, so that it is brought into close contact with the surface of the molding die 10.

After the urethane rubber was cured, the molding die 10 was taken out, and an elastic member 41 fitted to the molding die was formed integrally with the heating plate 42 on the contact surface of the heating plate with the molding die. In this embodiment, an LTV silicone rubber roller having a thickness of 1 mm was molded.

The procedure for forming an elastic roller using the apparatus of this embodiment is the same as that of the second embodiment. As described above, since the heat is always applied when the elastic material is simply applied, there is a problem in the durability of the bonding interface or the shape of the side surface of the molding die is not smooth (FIG. 4; stepped molding die). Although there was a problem in forming the contact surface according to the shape, even if a stepped molding die was used by using the above-mentioned heating plate, a thin roller having a thickness of 1 mm or less could be stably formed. It was possible to mold with high precision without thickness variation. In addition, the durability of the elastic material bonding interface was improved, and no problem occurred.

Further, similarly, a roller having a thickness of 2 mm is put in place of the cored bar, and a two-layer roller for forming a silicone rubber having a thickness of about 1 mm on the surface thereof is formed by the above-mentioned method using such a hot plate. As a result, it was possible to stably mold with high accuracy without thickness variation.

(Fifth Embodiment) In this embodiment, the elastic member 4
As No. 1, silicone rubber was used instead of urethane rubber. In this embodiment, an LTV silicone rubber roller having a thickness of 1 mm was molded. The procedure of forming an elastic roller using the apparatus of this embodiment is the same as that of the third embodiment.

By using a silicone rubber having a lower hardness than urethane rubber, the thickness of the elastic member 41 can be reduced to 1 mm.
From 30 minutes to 25 minutes at 120 ° C.

Further, since silicone rubber has a higher heat resistance temperature than urethane rubber, it does not deteriorate during heating and does not cause problems such as chipping or peeling due to rubber deterioration even when the number of moldings increases. By using a heating plate made of silicone rubber instead of urethane rubber as the elastic member 41 as described above, a thin roller having a thickness of 1 mm or less can be formed stably with no thickness variation and with high precision. Was. Also, the durability of the elastic member itself was improved, and problems such as chipping and peeling due to rubber deterioration did not occur. Further, a roller having a thickness of 2 mm is similarly inserted in place of the core metal, and about 1
A two-layer roller for molding a silicone rubber having a thickness of mm was also formed stably with high precision without such thickness variations by molding using such a hot plate by the above method.

(Sixth Embodiment) In this embodiment, the elastic member 4
As No. 1, fluorine rubber was used instead of urethane rubber. In this embodiment, an LTV silicone rubber roller having a thickness of 1 mm was molded.

The procedure of forming an elastic roller using the apparatus of this embodiment is the same as that of the third embodiment. Fluororubber has a higher heat resistance temperature than silicone rubber or urethane rubber, so there is no deterioration during heating and the strength of the rubber itself is better than silicone rubber. No problems such as chipping or peeling due to the problem occurred.

For this reason, when the thickness of the elastic member 41 is 1.5 mm,
The molding time was increased from 120 ° C. to 140 ° C., and the molding time was also reduced from 30 minutes to 15 minutes. As described above, by using a heating plate using fluorine rubber instead of urethane rubber as the elastic member 41, it is possible to form a thin roller having a thickness of 1 mm or less stably with high accuracy without thickness variation. did it.

Further, the strength and durability of the elastic member itself were improved, and problems such as chipping and peeling due to scratches and rubber deterioration did not occur. Further, similarly, a 2 mm thick roller is put in place of the cored bar, and a two-layer roller for forming a silicone rubber having a thickness of about 1 mm on the surface layer is also stable by molding the above method using such a hot plate. As a result, there was no variation in wall thickness and molding was possible with high precision.

[0071]

As described above, according to the present invention, the heating plate can be heated by the mold heating system even with a roller having a thin elastic layer or a multilayer roller in which an elastic layer is formed on the elastic layer. It can be molded with high accuracy without thickness variation by using it, and by selecting an elastic material, it maintains elasticity without deterioration even at a heating temperature of more than one hundred degrees Celsius, and it does not break even when repeatedly inserting and removing molds This brings about an effect that the roller can be stably manufactured by being in contact with the entire side surface of the molding die.

In particular, in the case of the conventional manufacturing method using no elastic member, it was difficult to obtain a roller having a uniform thickness by suppressing unevenness of the thickness of the roller. A roller having a high image quality can be obtained, and when applied to a fixing roller of an image forming apparatus, fixing accuracy can be improved. Further, in the case of the transport roller, a transport device free from eccentric deflection and the like can be provided.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a configuration of an apparatus showing a roller manufacturing method according to the present invention.

FIG. 2 is a sectional view of a main part of the apparatus of FIG. 1;

FIG. 3 is an explanatory diagram of an apparatus configuration according to a second embodiment.

FIG. 4 is a sectional view of a main part of FIG. 3;

FIG. 5 is a sectional view of a main part of an apparatus structure of a roller manufacturing method according to a third embodiment of the present invention.

FIG. 6 is a sectional view of a main part of an apparatus structure of a roller manufacturing method according to a fourth embodiment of the present invention.

FIG. 7 is an explanatory view of an apparatus configuration of a conventional method.

FIG. 8 is a sectional view of a main part of a conventional device.

FIG. 9 is a diagram illustrating a problem of the related art.

FIG. 10 is a diagram for explaining a problem of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Molding die 12 Cylindrical hole 16,18 Opening 20,22 Lid 26 Core metal member 30A Introducing hole 30,32 Lid cover 40 Hot plate 41 Elastic member 42 Perforated hot plate

Continued on the front page (51) Int.Cl. ⁷ Identification code FI G03G 15/20 G03G 15/20 // B29K 75:00 B29K 75:00 83:00 83:00 B29L 31:32 B29L 31:32 (72) Inventor Kazuo Kishino 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (56) References JP-A-53-134936 (JP, A) JP-A-6-134779 (JP, A) 3-124807 (JP, U) Actually open 1953-5562 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29C 33/00-33/76 B29C 45/00-45 / 84 B29D 31/00-31/02 G03G 15/00-15/32

Claims (5)

(57) [Claims] 1. A molding die having a lid attached to both ends of a cylindrical hole for holding a shaft-shaped core metal member concentrically with the cylindrical hole in a molding die having a penetrated cylindrical hole. An elastic material such as a silicone rubber material or a urethane rubber material is introduced therein by press-fitting or vacuuming, and heated by a heating hot plate divided in parallel to the axial direction of the cylindrical molding die. In forming a roller around the core metal member, the elastic material being formed into a cylindrical shape integrally with the core metal member, the urethane is provided on the contact surface of the heating hot plate with the molding die.
A method for manufacturing a roller, comprising disposing an elastic member made of rubber or silicone rubber . 2. A hole for receiving the cylindrical molding die is provided in place of a heating hot plate divided in parallel with the axial direction of the cylindrical molding die, and urethane rubber or silicon is provided on the inner surface thereof.
Method for producing a roller, characterized in that using the heating plate which arranged elastic member over Ngomu, heat press-fitting the cylindrical-shaped molding die there. 3. Applying a primer to the surface of the heating member on the molding die side of the heating plate, releasing the surface of the molding die, and putting the material of the elastic member between the heating plate and the molding die. 2. The roller according to claim 1, wherein an elastic member that is fitted to the molding die is formed integrally with the heating plate on a contact surface of the heating plate with the molding die by pressing and heating in this state. Manufacturing method. 4. Applying a primer to the inner surface of the hole in which the molding die of the heating hot plate enters the elastic member, releasing the molding die, placing the molding member in the hole of the heating plate, and placing the elastic member between the hole and the molding die. The material of the elastic member is put into the vulcanizer and then vulcanized in that state, and the molding die is taken out, so that the elastic member that fits the molding die is integrated with the heating plate on the contact surface of the heating platen with the molding die. The method for manufacturing a roller according to claim 2, wherein the roller is formed. 5. A mold having a cavity portion for forming an elastic roller, a heating plate for heating the mold, means for supporting the mold on the heating plate, and a portion between the mold and the heating plate. And a resilient member made of a urethane rubber material or a silicone rubber material interposed therebetween.