JP2019059569A - Method of manufacturing belt - Google Patents

Abstract

To enable an inner mold to be smoothly inserted into an outer mold.SOLUTION: A method of manufacturing a belt comprises: a covering step of covering an inner mold with an annular belt body; a mounting step of mounting a tube to the inside of a cylindrical outer mold; an inserting step of inserting the inner mold into the outer mold with the belt body and the tube in contact with each other through a lubricating liquid; and a sticking step of pressing one of the belt body and the tube against the other to stick the belt body and the tube together.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a method of manufacturing a belt.

  Patent Document 1 discloses a method of manufacturing a transport belt. In the manufacturing method of Patent Document 1, a cylindrical laminate in which a cylindrical seamless core, a hot melt adhesive and a cover material are laminated in this order is formed on the outer periphery of an airbag, and this cylindrical laminate and air are formed. The cylindrical laminate is pressed against the inner peripheral surface of the sleeve by inserting the bag and the sleeve into the sleeve and injecting pressurized air into the air bag for expansion, and heating the sleeve to a specific temperature by the heating means for hot melt adhesion The agent is melted, the seamless core and the cover material are bonded together, and then cooled to form a round slice.

Japanese Patent Application Laid-Open No. 11-130221

  Here, the annular belt body is covered on the inner mold, the tube is mounted on the inner side of the cylindrical outer mold, and when the inner mold is inserted on the inner side of the outer mold, the contact portion between the belt body and the tube When the entire surface is in direct contact, the frictional resistance between the belt body and the tube is large.

  According to the present invention, the inner mold can be smoothly inserted into the inner side of the outer mold as compared with the case where the inner mold is inserted into the inner side of the outer mold while the entire surface of the contact portion between the belt body and the tube is in direct contact. With the goal.

  The invention of claim 1 comprises the steps of: covering the annular belt body on the inner mold; mounting the tube on the inner side of the cylindrical outer mold; and contacting the belt body and the tube through the lubricating liquid. And inserting the inner mold into the outer mold, and pressing one of the belt body and the tube against the other to adhere the belt body and the tube. .

  In the inserting step according to the invention of claim 2, the inner mold is inserted inside the outer mold while supplying the lubricating fluid between the belt body and the tube.

  In the insertion step according to the invention of claim 3, the lubricating liquid is supplied from the upper side of the outer mold between the belt body and the tube in a state where the axial direction of the outer mold is directed in the vertical direction. While the inner mold is inserted inside the outer mold.

  The invention of claim 4 is carried out before the inserting step, and has an applying step of applying a lubricating liquid in advance to at least one of the outer peripheral surface of the belt body and the inner peripheral surface of the tube.

  In the application step according to the invention of claim 5, a lubricating liquid is applied in advance to both the outer peripheral surface of the belt body and the inner peripheral surface of the tube.

  According to the manufacturing method of claim 1 of the present invention, the inner mold is inside the outer mold compared to the case where the inner mold is inserted inside the outer mold in a state where the entire contact portion of the belt body and the tube is in direct contact. Can be inserted smoothly into the

  According to the manufacturing method of claim 2 of the present invention, even if the lubricating liquid having volatility is used as compared with the case where the lubricating liquid is only applied in advance to at least one of the outer peripheral surface of the belt and the inner peripheral surface of the tube. The belt body and the tube are maintained in contact via the lubricating fluid.

  According to the manufacturing method of claim 3 of the present invention, in the state where the axial direction of the outer mold is directed in the horizontal direction, compared with the case where the lubricating fluid is supplied between the belt body and the tube, The lubricating fluid can be distributed from one end to the other end in the axial direction.

  According to the manufacturing method of the fourth aspect of the present invention, the belt body and the tube are only supplied in the process of inserting the inner mold inside the outer mold compared to the case where the lubricating fluid is supplied between the belt body and the tube. The lubricating fluid can be distributed in the entire axial direction and circumferential direction.

  According to the manufacturing method of claim 5 of the present invention, the inner mold can be smoothly inserted inside the outer mold compared to the case where the lubricating liquid is applied in advance to only one of the outer peripheral surface of the belt and the inner peripheral surface of the tube. .

It is a perspective view showing a schematic structure of a belt concerning this embodiment. It is the schematic which shows the covering process in the manufacturing method of the belt which concerns on this embodiment. It is the schematic which shows the mounting process in the manufacturing method of the belt which concerns on this embodiment. It is the schematic which shows the mounting process in the manufacturing method of the belt which concerns on this embodiment. It is the schematic which shows the application process in the manufacturing method of the belt which concerns on this embodiment. It is the schematic which shows the application process in the manufacturing method of the belt which concerns on this embodiment. It is the schematic which shows the insertion process in the manufacturing method of the belt which concerns on this embodiment. It is the schematic which shows the adhesion process in the manufacturing method of the belt which concerns on this embodiment.

  Below, an example of the embodiment concerning the present invention is explained based on a drawing. Hereinafter, a belt 10 to be manufactured and a method of manufacturing the belt 10 will be described. In addition, the structure etc. which are shown by each figure are typical, and the dimensional ratio of each part shown by each figure may differ from an actual thing.

(Belt 10)
The belt 10 is, for example, a transparent belt capable of transmitting light. The belt 10 as a transparent belt is used as a fixing belt in an electrophotographic image forming apparatus, as an example. In this case, the recording medium is irradiated with light through the belt 10, and the toner on the recording medium is heated and fused to fix the toner image on the recording medium. Alternatively, an image is formed with an ultraviolet curable ink or the like, light (ultraviolet light or the like) is irradiated to the recording medium from the back through the belt 10, and the image is transferred and fixed to the recording medium.

  The belt 10 as a transparent belt is, as shown in FIG. 1, an annular base 12, an elastic layer 14 formed on the outer peripheral surface of the base 12, and a tube 16 coated on the outer peripheral surface of the elastic layer 14. And have.

  Examples of the substrate 12 include polyimide (PI). The base 12 may be made of a resin such as polyetherimide (PEI), polyetheretherketone (PEEK), polyphenylsulfone (PPSU), polyethersulfone (PES), polycarbonate (PC), etc. Good.

  Examples of the elastic layer 14 include silicone rubber. Examples of the tube 16 include tetrafluoroethylene-perfluoroalkoxyethylene copolymer (PFA). In addition, as the tube 16, a tetrafluoroethylene polymer (PTFE), a tetrafluoroethylene hexafluoropropylene copolymer (FEP), an ethylene tetrafluoroethylene copolymer (ETFE) or the like may be used.

  As described above, the belt 10 is, for example, a fixing belt in an electrophotographic image forming apparatus, but is not limited thereto. The belt 10 may be, for example, an intermediate transfer belt and a conveying belt in an electrophotographic image forming apparatus. The belt 10 may be a belt used for other applications.

(Method of manufacturing belt 10)
Next, an example of a method of manufacturing the belt 10 will be described. In addition, the manufacturing method of the belt 10 demonstrated below is an example, A various deformation | transformation, change, and improvement are possible within the range which does not deviate from the main point.

  The method of manufacturing the belt 10 includes, as an example, a belt body manufacturing process, a covering process, a mounting process, a coating process, an inserting process, an adhering process, and a mold removal process. Hereinafter, each process of the manufacturing method of the belt 10 will be described.

(Belt body manufacturing process)
The belt body manufacturing step is a step of manufacturing the belt body 20. The belt body 20 is an annular belt body formed of the above-mentioned base material 12 and the above-mentioned elastic layer 14 (see FIG. 2).

  The manufacturing process of the belt body 20 includes, for example, a preparation process and a formation process. In the preparation step, the annular base material 12 described above is prepared.

  The forming step is a step of forming the elastic layer 14 on the outer peripheral surface of the base 12 prepared in the preparation step. For example, in the case of using a transparent silicone rubber as the elastic layer 14, for example, a silicone rubber material is coated on the outer peripheral surface of the base 12 in the forming step, and is heated and pre-cured. In pre-curing, for example, heating is performed at 80 ° C. for 30 minutes. As a result, the precured elastic layer 14 is formed on the outer peripheral surface of the base 12. The coating of the silicone rubber material is performed by a known coating method such as, for example, a flow coating method, a dip coating method, or a spray coating method.

  Since the pre-curing is a pre-curing to such an extent that the final strength is not obtained, the pre-cured elastic layer 14 is in an uncured state.

(Covering process)
The covering step is a step of covering the inner mold 30 with the belt body 20 manufactured in the above-described belt body manufacturing step, as shown in FIG.

  The inner mold 30 has a cylindrical surface, and a fluid such as air can enter and exit inside. Furthermore, the inner die 30 is configured such that the cylindrical surface expands radially outward as the fluid flows into the inside. As the inner mold 30, one having heat resistance that can withstand heating in a heating process (heat treatment process) described later is used.

  Specifically, the inner mold 30 is, for example, a cylindrical cylinder made of heat resistant rubber, and an air bag provided inside the cylinder and made of heat resistant rubber. A type is used. In the inner type, the air bag and cylindrical type expand and contract in the radial direction due to the air entering and leaving the air bag. In addition, as a heat resistant rubber, urethane, silicone, ethylene propylene diene rubber (EPDM), etc. are used as an example.

  Then, in the covering step, specifically, the belt body 20 is covered on the inner mold 30 so that the inner peripheral surface of the belt body 20 is in contact with the cylindrical surface (outer peripheral surface) of the inner mold 30. Thus, the belt body 20 is held on the cylindrical surface (outer peripheral surface) of the inner mold 30.

(Mounting process)
The mounting step is a step of mounting the tube 16 inside the cylindrical outer mold 40 as shown in FIGS. 3 and 4. The outer mold 40 is a cylindrical outer mold. As the outer mold 40, for example, a steel pipe such as stainless steel (SUS) or an elastic cylindrical mold is used. More specifically, as the outer mold 40, a mold having rigidity to endure the internal pressure in the adhesion step described later, and heat resistance capable of resisting heating in the heating step described later is used.

  In the mounting process, for example, the tube 16 is coaxially inserted into the inside of the outer mold 40, and the tube 16 is mounted inside the outer mold 40. Specifically, the outer mold 40 holds the tube 16 so that the outer peripheral surface of the tube 16 slightly contacts the inner peripheral surface of the outer mold 40, whereby the tube 16 is attached to the outer mold 40.

  More specifically, in the present embodiment, as one example shown in FIG. 3, the tube 16 is coaxially inserted inside the outer mold 40 as shown in FIG. Fold it outwards. Furthermore, as shown in FIG. 4, the tube 16 is held on the outer mold 40 by the negative pressure by suctioning between the inner peripheral surface of the outer mold 40 and the outer peripheral surface of the tube 16. As a method of holding the tube 16 in the outer mold 40, electrostatic adsorption may be used.

(Coating process)
The application step is performed before the insertion step, and is a step of applying the lubricating fluid 50 in advance to at least one of the outer peripheral surface of the belt body 20 and the inner peripheral surface of the tube 16.

  Specifically, in the coating process of the present embodiment, as shown in FIG. 5, the lubricating fluid 50 is coated in advance on the outer peripheral surface of the belt body 20 which is covered on the inner mold 30. Furthermore, as shown in FIG. 6, the lubricating fluid 50 is applied in advance also to the inner peripheral surface of the tube 16 mounted on the inner side of the outer mold 40.

  The application of the lubricating fluid 50 is performed, for example, by spray application in which the lubricating fluid 50 is atomized and applied. In addition, as a coating method of the lubricating fluid 50, it is not restricted to spray coating, You may use another coating method.

  As described above, in the present embodiment, the lubricating fluid 50 is applied in advance to both the outer peripheral surface of the belt body 20 and the inner peripheral surface of the tube 16.

  A volatile liquid is used as the lubricating liquid 50. Specifically, as the lubricating liquid 50, for example, a liquid having a boiling point of 50 ° C. or more and 150 ° C. or less is used. In addition, the boiling point of the lubricating fluid 50 is taken as the boiling point of the temperature lower than the heating temperature in the below-mentioned heating process. More specifically, as the lubricating liquid 50, for example, a lubricating solvent such as water, an alcohol solvent, or a volatile fluorine solvent is used. It is preferable that the lubricating fluid 50 should not easily remain at the interface between the belt body 20 and the tube 16 even if it is vaporized in the heating process described later.

(Insertion process)
The insertion step is a step of inserting the inner mold 30 inside the outer mold 40 in a state where the belt body 20 and the tube 16 are in contact via the lubricating fluid 50 as shown in FIG. 7.

  Specifically, in the insertion step, the inner die 30 is inserted inside the outer die 40 while the lubricating fluid 50 is supplied between the belt body 20 and the tube 16.

  More specifically, in the insertion step, the lubricating liquid 50 is supplied from the upper side of the outer mold 40 between the belt body 20 and the tube 16 in a state where the axial direction of the outer mold 40 is directed vertically. Insert the inner die 30 into the inner side of the outer die 40.

  More specifically, in the present embodiment, the inner die 30 is fitted into the outer die 40. In other words, in the present embodiment, the inner die 30 is pressed into the outer die 40. The inner die 30 inserted into the outer die 40 slides relative to the outer die 40. In addition, sliding means sliding.

  When the inner die 30 is inserted into the outer die 40, the lubricating fluid 50 is interposed between the belt body 20 and the tube 16 as a liquid film.

  Insertion of the inner mold 30 inside the outer mold 40 is performed as follows, as an example. That is, the outer mold 40 is supported in a state in which the axial direction of the outer mold 40 is directed in the vertical direction, and the inner mold 30 is inserted from the upper side of the outer mold 40 in a state in which the axial direction of the inner mold 30 is directed in the vertical direction. Be done. The inner die 30 is inserted downward along the axial direction of the outer die 40.

  Supply of the lubricating fluid 50 between the belt body 20 and the tube 16 is performed as follows, as an example. That is, on the outer peripheral surface of the belt body 20 placed on the inner mold 30 inserted from the upper side of the outer mold 40, spray coating is performed at a plurality of places in the circumferential direction of the outer mold 40 above the outer mold 40. By spraying the outer peripheral surface of the belt body 20, the mist-like lubricating liquid 50 is applied to the outer peripheral surface of the belt body 20. Then, the belt body 20 having the lubricating liquid 50 applied to the outer peripheral surface is inserted into the outer mold 40 together with the inner mold 30, so that the lubricating liquid 50 is supplied between the belt body 20 and the tube 16.

  The position where the spray application is performed on the outer peripheral surface of the belt body 20 is, for example, the upper side of the upper end of the outer mold 40 and a position close to the upper end. Further, by applying the lubricant on the upper side of the upper end of the outer mold 40 and at a position close to the upper end, the lubricating fluid 50 is applied before the lubricating fluid 50 is supplied between the belt body 20 and the tube 16. Vaporization is suppressed when the belt is inserted.

  In the insertion step, the supply of the lubricating fluid 50 may be performed in the process of advancing the insertion of the inner die 30. Therefore, the supply operation of the lubricating fluid 50 and the insertion operation of the inner die 30 may be performed alternately, or the supply operation of the lubricating fluid 50 and the insertion operation of the inner die 30 may be performed simultaneously.

  Moreover, as a method of apply | coating to the outer peripheral surface of the belt body 20, it is not restricted to spray application, You may use other application methods (for example, surface application etc. by web etc.).

  Further, the method of supplying the lubricating fluid 50 between the belt body 20 and the tube 16 is not limited to the method of applying the lubricating liquid 50 to the outer peripheral surface of the belt body 20, for example, between the belt body 20 and the tube 16 The lubricating fluid 50 may be supplied by dropping.

(Adhesion process)
The attaching step is a step of attaching one of the belt body 20 and the tube 16 by pressing one of the belt body 20 and the tube 16 against the other. Specifically, as shown in FIG. 8, the attaching step is a step of pressing the belt body 20 against the tube 16 to bring the belt body 20 and the tube 16 into close contact. More specifically, the adhesion process has a pressing process and a heating process.

  The pressing step is a step of pressing the belt body 20 placed on the inner mold 30 against the tube 16 mounted on the outer mold 40. Specifically, in the pressing process, air is introduced into the air bag of the inner mold 30 to expand the inner mold 30 radially outward. Thereby, the belt body 20 is pressed against the tube 16 by pressure.

  The heating step is a step of heating the belt body 20 to cure the elastic layer 14 in the uncured state of the belt body 20. Specifically, in the heating step, the inner die 30 and the outer die 40 are heated in a state in which the pressing of the belt body 20 to the tube 16 in the pressing step is maintained. Thereby, the elastic layer 14 in the uncured state is cured, and the elastic layer 14 and the tube 16 are in close contact with each other. The heating temperature in the heating step is a temperature which is at least higher than the boiling point of the lubricating liquid 50, and is, for example, a temperature of about 180 ° C. to 200 ° C. For this reason, it is suppressed that the component of the lubricating fluid 50 remains on the inner surface.

  As described above, in the heating process, since the belt body 20 and the tube 16 are heated in a pressurized state between the inner mold 30 and the outer mold 40, gas and volatile components generated from the elastic layer 14 are suppressed, and Wrinkles and swells of the manufactured belt 10 are suppressed.

  Further, by heating the belt body 20 and the tube 16 in a pressurized state between the inner die 30 and the outer die 40, surface smoothness is provided between the tube 16 and the outer die 40, which will be described later. It becomes easy to demold from the outer mold 40 in the demolding process of Furthermore, since the belt body 20 and the tube 16 are heated while being pressurized between the inner mold 30 and the outer mold 40, the adhesion between the elastic layer 14 and the tube 16 is enhanced.

(Demolding process)
The demolding process is a process of removing the belt body 20 and the tube 16 from the inner mold 30 and the outer mold 40. Specifically, in the demolding process, after the belt body 20 and the tube 16 are cooled, the air bag of the inner mold 30 is evacuated and the belt body 20 and the inner mold 30 and the outer mold 40 in close contact with each other Remove the tube 16 Thereby, the belt 10 is manufactured.

(Operation of the present embodiment)
According to the manufacturing method of the present embodiment, the inner die 30 is inserted inside the outer die 40 in a state where the belt body 20 and the tube 16 are in contact via the lubricating fluid 50 in the insertion step.

  Here, when the inner die 30 is inserted inside the outer die 40 in a state where the entire contact portion (SA portion in FIG. 7) of the belt body 20 and the tube 16 directly contacts without the lubricating fluid 50. In the first comparative example, the frictional resistance between the belt body 20 and the tube 16 is large.

  On the other hand, in the present embodiment, the inner die 30 is inserted inside the outer die 40 in a state where the belt body 20 and the tube 16 are in contact via the lubricating fluid 50, compared with the first comparative example. The inner die 30 is smoothly (smoothly) inserted into the inner side of the outer die 40. In other words, according to the present embodiment, the load required to insert the inner die 30 into the inner side of the outer die 40 is smaller than in the first comparative example. Further, by the inner mold 30 being smoothly inserted into the inner side of the outer mold 40, damage and deformation of the tube 16 and the belt body 20 are suppressed, and external defects of the manufactured belt body 20 are suppressed.

  According to the manufacturing method of the present embodiment, specifically, the inner die 30 is inserted inside the outer die 40 while supplying the lubricating fluid 50 between the belt body 20 and the tube 16 in the insertion step.

  For this reason, the application or supply of the lubricating fluid 50 is performed compared to the case where the lubricating fluid 50 is only applied in advance to at least one of the outer circumferential surface of the belt body 20 and the inner circumferential surface of the tube 16 (the second comparative example). Since the time until the insertion of the inner die 30 is performed is short, even when the lubricating fluid 50 having volatility is used, the lubricating fluid 50 is difficult to evaporate. Therefore, even when the lubricating fluid 50 having volatility is used, the state in which the belt body 20 and the tube 16 are in contact via the lubricating fluid 50 is maintained as compared with the second comparative example.

  According to the manufacturing method of the present embodiment, more specifically, in the insertion step, the axial direction of the outer mold 40 is directed in the vertical direction, and the outer mold 40 is formed between the belt body 20 and the tube 16. The inner die 30 is inserted inside the outer die 40 while supplying the lubricating fluid 50 from the upper side.

  Therefore, the belt body 20 and the tube are compared with the case where the lubricating fluid 50 is supplied between the belt body 20 and the tube 16 in a state where the axial direction of the outer mold 40 is directed in the horizontal direction (the third comparative example). The lubricating fluid 50 supplied between the belt 16 and the belt 16 easily flows downward from one end (upper end) in the axial direction of the belt body 20 and the tube 16 to the other end (lower end) by gravity. As a result, the lubricating fluid 50 spreads from one end (upper end) in the axial direction of the belt body 20 and the tube 16 to the other end (lower end).

  According to the manufacturing method of the present embodiment, at least one of the outer peripheral surface of the belt body 20 and the inner peripheral surface of the tube 16 is coated with the lubricating fluid 50 in the coating step.

  Here, in the case where the lubricating fluid 50 is supplied between the belt body 20 and the tube 16 only in the process of inserting the inner die 30 into the inner side of the outer die 40 (fourth comparative example), the lubricating fluid 50 is The lubricating fluid 50 may run short at the end of the belt body 20 and the insertion side of the tube 16 because it is not applied in advance.

  On the other hand, in the manufacturing method of the present embodiment, since the lubricating fluid 50 is applied in advance, spreading the lubricating fluid in the entire axial direction and circumferential direction of the belt body 20 and the tube 16 as compared with the fourth comparative example. Can. In particular, the shortage of the lubricating fluid 50 is suppressed at the end of the belt body 20 and the insertion side of the tube 16.

  Further, according to the manufacturing method of the present embodiment, specifically, the lubricating liquid 50 is applied in advance to both the outer peripheral surface of the belt 20 and the inner peripheral surface of the tube 16 in the application step. Therefore, the inner die 30 is smoothly inserted into the outer die 40 as compared with the case where the lubricating fluid 50 is applied in advance to only one of the outer peripheral surface of the belt body 20 and the inner peripheral surface of the tube 16.

(Modification)
In the manufacturing method of this embodiment, although the lubricating liquid 50 was previously apply | coated to the outer peripheral surface of the belt body 20, and the inner peripheral surface of the tube 16 in the application process, it is not restricted to this. For example, in the application step, the lubricating fluid 50 may be applied in advance to only one of the outer peripheral surface of the belt 20 and the inner peripheral surface of the tube 16. That is, in the application step, the lubricating liquid may be applied in advance to at least one of the outer peripheral surface of the belt body 20 and the inner peripheral surface of the tube 16.

  Moreover, although the manufacturing method of this embodiment had the application process which apply | coats the lubricating liquid 50 previously to at least one of the outer peripheral surface of the belt body 20, and the inner peripheral surface of the tube 16, it is not restricted to this. For example, in the insertion step, if the inner die 30 is inserted inside the outer die 40 while supplying the lubricating fluid 50 between the belt body 20 and the tube 16, the application step may not be performed.

  Further, in the manufacturing method of the present embodiment, the inner die 30 is inserted inside the outer die 40 while the lubricating fluid 50 is sequentially wetted with a web or the like between the belt body 20 and the tube 16 in the insertion step. However, it is not limited to this. For example, in the case of applying the lubricating fluid 50 in advance to at least one of the outer circumferential surface of the belt body 20 and the inner circumferential surface of the tube 16 in the applying step, the lubricating fluid 50 is not supplied in the inserting step. The mold 30 may be inserted inside the outer mold 40.

  Further, in the manufacturing method of the present embodiment, in the insertion step, the lubricating fluid 50 is applied between the belt body 20 and the tube 16 from the upper side of the outer mold 40 in a state where the axial direction of the outer mold 40 is directed vertically. Although the inner mold 30 is inserted inside the outer mold 40 while being supplied, the present invention is not limited thereto. For example, in the insertion step, the inner die 30 is placed inside the outer die 40 while the lubricating fluid 50 is supplied between the belt body 20 and the tube 16 in a state where the axial direction of the outer die 40 is directed horizontally. You may insert it.

  Further, in the manufacturing method of the present embodiment, in the insertion step, the inner mold 30 is inserted from the upper side of the outer mold 40 in the state where the axial direction of the outer mold 40 is directed in the vertical direction. Absent. For example, in the insertion step, the inner die 30 may be inserted from the lower side of the outer die 40 in a state where the axial direction of the outer die 40 is vertically oriented. In this case, the outer peripheral surface of the belt body 20 placed on the inner mold 30 inserted from the lower side of the outer mold 40 may be spray-coated on the lower side of the outer mold 40. In this case, the inner die 30 is inserted from the lower side to the inner side of the outer die 40 while the lubricating fluid 50 is supplied between the belt body 20 and the tube 16 from the lower side of the outer die 40.

  Moreover, in the manufacturing method of this embodiment, although the belt body 20 was pressed on the tube 16 and the belt body 20 and the tube 16 were made to adhere, it is not restricted to this. For example, by pressing the tube 16 with the outer mold 40, the tube 16 may be pressed against the belt body 20 to be attached to the belt body 20 and the tube 16. That is, in the adhering step, one of the belt body 20 and the tube 16 may be pressed against the other to adhere the belt body 20 and the tube 16.

  The present invention is not limited to the above embodiment, and various modifications, changes, and improvements can be made without departing from the scope of the invention. For example, the modifications shown above may be combined with each other as appropriate.

Reference Signs List 10 belt 12 base material 14 elastic layer 16 tube 20 belt body 30 inner mold 40 outer mold 50 lubricating fluid

Claims (5)

Covering the annular belt body on the inner mold;
Attaching the tube to the inside of the cylindrical outer mold;
Inserting the inner mold inside the outer mold in a state in which the belt body and the tube are in contact via a lubricating fluid;
Attaching one of the belt body and the tube to the other to adhere the belt body and the tube;
A method of manufacturing a belt having: The method according to claim 1, wherein in the inserting step, the inner mold is inserted inside the outer mold while supplying the lubricating fluid between the belt body and the tube. In the inserting step, in a state where the axial direction of the outer mold is directed in the vertical direction, the inner mold is inserted while the lubricating liquid is supplied from the upper side of the outer mold between the belt body and the tube. The method for manufacturing a belt according to claim 2, wherein the belt is inserted inside an outer mold. Done before the insertion step,
The manufacturing method of the belt of any one of Claims 1-3 which has an application process which apply | coats a lubricating fluid previously to at least one of the outer peripheral surface of the said belt body, and the internal peripheral surface of the said tube. The method for manufacturing a belt according to claim 4, wherein a lubricating liquid is applied in advance to both the outer peripheral surface of the belt body and the inner peripheral surface of the tube in the application step.