WO2012070197A1

WO2012070197A1 - Method for manufacturing conveyor belt and system for manufacturing same

Info

Publication number: WO2012070197A1
Application number: PCT/JP2011/006345
Authority: WO
Inventors: 貴幸大久保; 鉄平中山
Original assignee: バンドー化学株式会社
Priority date: 2010-11-24
Filing date: 2011-11-14
Publication date: 2012-05-31
Also published as: TW201221446A; JP2012111585A

Abstract

Provided are a method for manufacturing a conveyor belt which is improved in bonding property between steel cord and rubber and a system for manufacturing the same. To achieve these purposes, the system includes a washing/drying unit (11) and a pre-pressing unit (12) between a tensioner (3) and a heating press (4). The washing/drying unit (11) washes using a washing liquid and dries at least the outer peripheral surface of a steel cord (S), and the pre-pressing unit (12) covers the steel cord (S), which has been washed and dried, integrally with an unvulcanized rubber sheet. The units (11, 12) are placed on first and second carriers (13A, 13B), respectively. While the carriers (13A, 13B) are being moved, control is provided to a series of operations by the units (11, 12) so that the steel cord (S) having been washed and dried is covered integrally with the unvulcanized rubber sheet prior to vulcanization.

Description

Conveyor belt manufacturing method and apparatus

The present invention relates to a method of manufacturing a conveyor belt having a steel cord as a core and a manufacturing apparatus thereof.

When manufacturing a conveyor belt having a steel cord as a core, stable adhesion between the steel cord and rubber is required.

Therefore, the inventors examined the adhesiveness of the steel cord, and found that there is a difference in the surface properties of the steel cord between the steel cord with good adhesion and the steel cord with poor adhesion. In other words, unlike other steel cords, the steel cord used for the core of the conveyor belt is generally galvanized, and the one with poor adhesion is better than the one with good adhesion. The ratio of zinc oxide and zinc hydroxide present on the cord surface is large, and the ratio of metal zinc is small.

The zinc plating applied to the steel cord as the core of the conveyor belt has a first purpose of rust prevention against long-term use and moisture intrusion when the cover rubber is broken.
The principle of rust prevention of zinc plating is sacrificial corrosion due to its own oxidation, strictly speaking, oxidation starts immediately after plating. On the other hand, since the adhesion mechanism between zinc and rubber is based on a chemical “Zn—S” bond between metallic zinc and sulfur compounded in rubber, it is difficult to bond zinc oxide and rubber.

Incidentally, it is known that the steel cord is washed in order to improve the adhesion between the rubber and the steel cord (for example, see Patent Documents 1 and 2).

JP 2001-234371 A JP 2009-016991 A

The one described in Patent Document 1 is for cleaning a steel cord with copper alloy plating, and the one described in Patent Document 2 is for cleaning a steel cord that has been subjected to brass plating. It cannot be applied directly to code cleaning.

Even after cleaning, after a certain amount of time has passed, oxidation proceeds and the ratio of zinc oxide and the like existing on the cord surface increases, resulting in inferior adhesion, after the steel cord has been manufactured. .

Therefore, the inventors do not need to simply remove the steel cord by washing zinc oxide or the like. After the washing, the steel cord is covered with the cover of the conveyor belt in a state where the outer peripheral surface of the steel cord is not oxidized. If it is covered with an unvulcanized rubber sheet that will be rubber, the covered steel cord will not touch the air, so oxidation will not progress, and adhesion to rubber will not be impaired by the increase in zinc oxide, etc. It has been conceived and the present invention has been made.

An object of the present invention is to provide a method for manufacturing a conveyor belt and an apparatus for manufacturing the conveyor belt which are excellent in adhesion of a steel cord as a core to rubber.

The invention of claim 1 is a method of manufacturing a conveyor belt having a galvanized steel cord as a core (core cord), wherein at least the outer peripheral surface of the steel cord is washed with a cleaning liquid and dried. A washing and drying step; and a pre-pressing step of covering the steel cord after washing and drying with an unvulcanized rubber sheet continuously with the washing and drying step, and integrating them prior to the vulcanization treatment. Features. Here, “cleaning” means that an adhesion inhibitor such as zinc oxide is removed so that the adhesion rate of rubber exceeds 60% (preferably 70%). The term "" refers to washing with a liquid that can remove adhesion inhibitors such as zinc oxide by washing. Usually, degreasing with an alkaline liquid, removing the oxide film with an acidic liquid, and then washing with an alkaline liquid or water. To remove the acid liquid,
Depending on the properties of the outer peripheral surface of the cord, it is possible to clean only with an alkaline cleaning solution. “Continuously” means that the oxidation does not proceed to such an extent that the adhesion to rubber is impaired, that is, there is no significant time lag between washing and drying and prepressing.

In this way, by cleaning the steel cord with the cleaning liquid, the metal cord occupying the outer peripheral surface is removed from the outer peripheral surface of the steel cord to which the rubber is adhered, by removing adhesion obstructions such as zinc oxide that inhibits the adhesive performance of the rubber. Continuing the washing and drying process to increase the zinc ratio, the steel cord after washing and drying is covered with an unvulcanized rubber sheet and integrated, so that the steel cord is conveyorized before the oxidation of the outer surface proceeds. It is covered with an unvulcanized rubber sheet that becomes the cover rubber of the belt. Therefore, the adhesion mechanism due to the chemical “Zn-S” bond between metallic zinc and sulfur compounded in rubber is not hindered by adhesion inhibitors such as zinc oxide, and the adhesion between steel cord and rubber The required adhesive strength can be obtained.

Moreover, if the steel cord can be stored or stored in a state in which the oxidation of the steel cord does not proceed even if it is not immediately covered with an unvulcanized rubber sheet that becomes the cover rubber of the conveyor belt after washing and drying, the outer surface of the steel cord can be stored. Since zinc oxide does not increase, the adhesion between the steel cord and rubber is not impaired. Therefore, it can be configured as in the inventions of

claims

2 and 3. That is, a method for manufacturing a conveyor belt having a galvanized steel cord as a core,
Assuming that the steel cord has a cleaning / drying process in which at least the outer peripheral surface of the steel cord is cleaned with a cleaning liquid and dried, the invention of claim 2 is directed to the steel cord after the cleaning / drying after the cleaning / drying process. A coating process for coating the outer peripheral surface with a coating material, and a pre-press process for covering the steel cord coated in the coating process with an unvulcanized rubber sheet and integrating them prior to the vulcanization process. According to a third aspect of the present invention, there is provided a storage step of storing the steel cord after washing and drying in an oxidation-inhibiting atmosphere continuously with the washing and drying step, and unvulcanizing the stored steel cord. And a pre-pressing step of covering them with a rubber sheet and integrating them prior to the vulcanization treatment. Here, as the “coating material”, a material that does not impair the adhesiveness of the unvulcanized rubber sheet, for example, a rubber made of the same material as the unvulcanized rubber is used. The “coating process” is a so-called dipping process or a pasting process. Corresponds. Further, the “oxidation-inhibiting atmosphere” means a nitrogen atmosphere, an inert gas atmosphere, or an air atmosphere having a temperature / humidity condition that delays oxidation. “Storage” includes not only indoor storage but also storage in a container (for example, a drum).

In this way, the steel cord can be washed in advance and stored or stored, and there is no need to perform a process of covering with an unvulcanized rubber sheet immediately after washing and drying. In particular, in the case of claim 2, since the outer peripheral surface of the steel cord is covered with a coating material so that the steel cord does not come into contact with air (oxygen), it can be stored or stored in a normal atmospheric atmosphere. It is also possible to leave.

In this case, as long as the environment can control the atmospheric temperature and the relative humidity, the oxidation-inhibiting atmosphere is an air atmosphere having an atmospheric temperature of 20 to 30 ° C. and a relative humidity of 60% or less, or an atmosphere as described in claim 4. 6. If the air atmosphere has a temperature of 20 to 40 ° C. and a relative humidity of 50% or less, the adhesiveness will not be impaired even if stored for about 24 hours. In an air atmosphere with an ambient temperature of 20 to 35 ° C. and a relative humidity of 50% or less, or an air atmosphere with an ambient temperature of 20 to 40 ° C. and a relative humidity of 40% or less, adhesiveness is maintained even after storage for about 72 hours. It will not be damaged.

The invention of claim 6 is to apply a certain tension to the steel cord and feed it out, cover the steel cord with an unvulcanized rubber sheet, pre-press, then vulcanize,
A conveyor belt manufacturing apparatus for manufacturing a conveyor belt having the steel cord as a core, wherein a cleaning / drying unit for cleaning and drying at least an outer peripheral surface of the steel cord with a cleaning liquid, and after the cleaning / drying A pre-press unit that covers the steel cord with the unvulcanized rubber sheet and integrates them, and a series of operations by the washing / drying unit and the pre-press unit are controlled, and the steel cord after washing / drying before vulcanization And a control unit that covers the unvulcanized rubber sheet and integrates them. Here, by moving a plurality of steel cords arranged in parallel, it may be allowed to pass through the washing and drying unit and the prepress unit in order, or conversely, with respect to the plurality of steel cords arranged in parallel. The cleaning / drying unit and the prepress unit may move in order to perform a predetermined process.

In this way, the operation of the washing / drying unit and the preset unit is controlled to remove the metallic zinc that impairs adhesion to rubber before covering the steel cord with the unvulcanized rubber sheet. Can be incorporated into the part.

The cleaning / drying unit and the prepress unit are respectively provided on the first and second moving tables, and one of the first and second moving tables is a first one. One of the first and second movable platforms and the upper one thereof are provided to be movable along the rail, and the other is provided to be movable along the second rail provided inside the first rail. The unit provided in the gate is formed in a gate shape, and the other provided on the other of the first and second moving platforms and the unit provided thereon are the first
It is also possible to pass through one of the second moving tables and a unit provided thereon. Here, the unit may be moved not only when moving on the ground but also when suspended from the air. The accessories of the cleaning / drying unit and the preset unit (for example, a cleaning liquid tank, unadded) A rubber rubber sheet roller or the like) may be moved together with the moving table, or may be placed (fixed) at an appropriate place in the moving range.

In this way, it is possible to perform washing and drying and pre-pressing over the entire required part by alternately moving the first and second moving tables.

In addition, as described in claim 8, the cleaning / drying unit and the pre-press unit are mounted on the same moving table so that the cleaning / drying unit is closer to a feeding side of the steel cord than the pre-press unit. It can be set as the arrangement.

In this way, it is possible to easily prepare an unvulcanized conveyor belt molded body which is immediately pre-pressed after washing and drying and then vulcanized by moving the moving table.

In the present invention, as described above, the steel cord is washed with a cleaning liquid, thereby removing an adhesion inhibitor such as zinc oxide that inhibits the adhesion performance of the rubber from the outer peripheral surface of the steel cord to which the rubber is adhered. In addition, since the steel cord after being cleaned is covered with an unvulcanized rubber sheet and vulcanized, adhesion between the steel cord and rubber can be enhanced in the manufactured conveyor belt.

It is explanatory drawing which shows schematic structure of the manufacturing apparatus of the conveyor belt which concerns on this invention. It is operation | movement explanatory drawing of the said manufacturing apparatus. It is operation | movement explanatory drawing of the said manufacturing apparatus. It is operation | movement explanatory drawing of the said manufacturing apparatus. It is explanatory drawing about other embodiment of the said manufacturing apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the conveyor belt manufacturing apparatus 1 is fed out from a plurality of spools 2a supported by a spool stand 2 with a plurality of steel cords S provided with a certain tension by a tensioner 3. The fed steel cord S is washed, covered with an unvulcanized rubber sheet, pre-pressed, and then vulcanized by heating and pressing with a heating press 4 to form a conveyor belt having the steel cord S as a core ( Manufactured) and wound by the reel device 5. Before and after the heating press 4, clamp bars 6A and 6B are arranged to clamp the front and rear of the belt molded body during vulcanization.

Specifically, the conveyor belt manufacturing apparatus 1 removes adhesion obstructions such as zinc oxide by cleaning at least the outer peripheral surface of the steel cord S between the tensioner 3 and the heating press 4 with a cleaning liquid, A cleaning / drying unit 11 for drying and a pre-press unit 12 for covering the steel cord S after the cleaning / drying with an unvulcanized rubber sheet G and integrating them are provided. Both units 11 and 12 are mounted on the first and second movable bases 13A and 13B, respectively.

A first moving base 13A is provided to be movable along a first rail (not shown), and a second moving base 13B is a second rail (not shown) provided inside the first rail. Z)). The first moving table 13A and the unit 11 provided thereon are formed in a gate shape, and the second moving table 13B and the unit 12 provided thereon are formed in a gate shape. It can pass through the gates of the table 13A and the cleaning / drying unit 11.

As a result, the first and second movable bases 13A and 13B can be moved by passing each other, and by alternately moving them, washing and drying and pre-pressing are alternately performed over the entire required part, thereby improving efficiency. Can work well. The operation of both units 11 and 12 and the movement of the moving bases 13A and 13B are controlled by known control means such as a personal computer. That is, while moving the moving bases 13A and 13B, a series of operations by the units 11 and 12 are controlled, and the washed and dried steel cord S is covered with the unvulcanized rubber sheet prior to vulcanization. Are designed to be integrated. In this way, the operation of the washing / drying unit 11 and the preset unit 12 is controlled, and before the steel cord S is covered with the unvulcanized rubber sheet, an adhesion inhibitor such as zinc oxide that impairs the rubber adhesion is removed. Processing is incorporated as part of the manufacturing process.

Next, a method for producing a conveyor belt having the steel cord S that is galvanized as a core body using the above-described apparatus will be described.
(Cord feeding process)
From a plurality of spools 2a supported by the spool stand 2, a plurality of steel cords S are fed in parallel with a constant tension applied by a tensioner 3. This feed amount is appropriately determined according to the length of the unvulcanized conveyor belt molded body that is pressurized and heated by the heating press 4.
(Washing and drying process)
In order to remove the adhesion inhibitor such as zinc oxide and zinc hydroxide adhering to at least the outer peripheral surface of the fed steel cord S with a cleaning liquid and then dry it, a dry cleaning unit 11 is shown in FIG. 1 is moved in the direction of the arrow A as shown in FIG. This cleaning is performed by applying a cleaning solution to the steel cord S, wetting the outer peripheral surface of the steel cord with the cleaning solution, and drying by blowing hot air. Then, after the washing and drying unit 11 passes, the steel cord S is washed and dried, and adhesion inhibitors such as zinc oxide are removed, and there is a large amount of metallic zinc present on the outer peripheral surface that does not impair adhesion. It has become.

Cleaning for removing adhesion inhibitors such as zinc oxide and zinc hydroxide is performed by degreasing with an alkaline solution, removing the oxide film with an acidic solution, and then removing the acidic solution by washing with an alkaline solution or water. However, depending on the properties of the outer peripheral surface of the cord, it is possible to clean only with an alkaline cleaning solution.

洗浄 By washing the steel cord with a cleaning solution, zinc oxide and the like that inhibit rubber adhesion performance can be removed from the outer peripheral surface of the steel cord to which the rubber is adhered.

In the cleaning / drying step, the cleaning liquid measures the pH of the cleaning liquid after cleaning the steel cord, determines the cleaning capability based on the measured value, and reuses the cleaning capability after cleaning. It is desirable.

As the alkaline liquid or acidic liquid used for the washing, alkaline ionic water or acidic ionic water generated by electrolyzing raw water can also be used. If such ionic water is used, the alkaline ionic water and the acidic ionic water that have become waste liquids can be mixed and neutralized and drained after washing, thus simplifying the waste liquid treatment. In particular, if the raw water is electrolyzed to produce equivalent amounts of alkaline ionized water and acidic ionized water, degreasing with alkaline ionized water, removing the oxide film with acidic ionized water, washing again with alkaline ionized water, It is also possible to drain the waste liquid together with acids and alkalis used for degreasing and oxide film removal (hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, sodium hydroxide aqueous solution and organic substances adjusted using chemicals). This eliminates the need to use deleterious toxic substances that require attention when handling solvents, etc.), which is extremely advantageous in terms of handling.
(Pre-press process)
In the cleaning / drying step, when the cleaning / drying unit 11 is moving and performing cleaning / drying, the pre-press unit 12 is moved to the initial position (cleaning by moving the second moving table 13B in the direction opposite to the A direction. Although it is being dried, it has moved to the first position corresponding to the uncoated portion of the steel cord that has not yet been coated with the unvulcanized rubber sheet (see Fig. 3).

Then, continuously with the washing and drying, as shown in FIG. 4, the steel cord S after washing and drying is covered with an unvulcanized rubber sheet, and they are pressed and integrated to form an unvulcanized belt molded body T1. To do. By the integration by this pressurization, the periphery of the steel cord S is covered with unvulcanized rubber and is not in contact with air.

In this way, immediately after washing and drying, the steel cord after washing and drying is covered with an unvulcanized rubber sheet and pre-pressed, so that the progress of oxidation of the cord after washing and drying is surely avoided, and the steel cord rubber This is an advantageous situation in securing the necessary adhesive strength to the.
(Vulcanization process)
The integrated unvulcanized belt molded body T1 is moved by a predetermined amount to the heating press 4 side by winding the vulcanized belt molded body 2 of the reel device 5, and vulcanized by heating and pressurization. Done. In this vulcanization, the steel cord after being washed and dried is covered with an unvulcanized rubber sheet without much time lag, so that the steel cord whose outer peripheral surface is not oxidized and unvulcanized rubber are pressurized. This is done by heating, and high adhesion of rubber to the steel cord can be obtained.

By the way, even if it is not covered with an unvulcanized rubber sheet immediately after washing and drying, if it is stored in a state in which the oxidation of the steel cord does not progress or is suppressed, the oxidation can be avoided or delayed. If steel cords are stored or stored by controlling the progress of oxidation of cords, adhesion to rubber will not be impaired when manufacturing conveyor belts using such steel cords. It is done. Therefore, it was tested to what extent the adhesive force required could not be obtained if left in an atmosphere where the temperature and humidity were changed. The results are shown in the following table. The adhesion rate of rubber is measured visually or using optical means, and it is desirable for safety to exceed 70%. However, if it exceeds 60%, the necessary adhesion can be obtained. It has been confirmed.

From this table, it can be seen that if the ambient temperature is 20 ° C., even if the relative humidity is about 90%, even if it is stored for about 72 hours, the adhesiveness is not greatly affected. Similarly, when the ambient temperature is 25 ° C., if the relative humidity is about 90%, the necessary adhesion is secured for about 24 hours, and if it is 70% or less, it can be stored for about 72 hours. There is no significant effect on adhesion. When the ambient temperature is 30 ° C., if the relative humidity is about 60%, the necessary adhesiveness is secured for about 24 hours, and if it is 60% or less, the adhesiveness is great even if stored for about 72 hours. There is no effect. When the ambient temperature is 35 ° C., if the relative humidity is about 50%, the adhesiveness is not greatly affected even if stored for about 72 hours. When the ambient temperature is 40 ° C., if the relative humidity is about 50%, the necessary adhesiveness is secured for about 24 hours, and if it is 40% or less, the adhesiveness is maintained even after storage for about 72 hours. There is no big influence.

From this result, if it is stored for about 24 hours, the relative humidity should be maintained at 60% or less if the ambient temperature is 20 to 30 ° C, and if the ambient temperature is 20 to 40 ° C, the relative humidity is 50%. If the following is maintained, the adhesiveness is not impaired even if it is left for about 24 hours after washing. If it is stored for about 72 hours, the relative humidity should be maintained at 50% or less if the ambient temperature is 20 to 35 ° C, and the relative humidity should be 40% or less if the ambient temperature is 20 to 40 ° C. It can be said that it should be maintained.

The present invention can be implemented with the following modifications in addition to the above.

(i) In the above-described embodiment, the cleaning / drying unit 11 and the prepress unit 12 are separately placed on the first and second movable bases 13A and 13B, respectively, but the present invention is not limited thereto. Instead of this, both units 11 and 12 may be mounted on the same movable table 13.

In this case, as shown in FIG. 5, the cleaning / drying unit 11 and the prepress unit 12 are the same so that the cleaning / drying unit 11 is closer to the feeding side (tensioner 3 side) of the steel cord S than the prepress unit 12. Placed on the movable table 13. By moving the same moving table 13, the pre-press is performed immediately after washing and drying, so that the outer peripheral surface of the steel cord can be covered with the unvulcanized rubber sheet G before the zinc of zinc plating is oxidized. .

(ii) In the above embodiment, the cleaning / drying unit 11 and the prepress unit 12 are moved while cleaning and prepressing are performed. However, both units are fixed in place, and the steel cord is vulcanized. It can also be moved in consideration of the relationship.

(iii) In the above-described embodiment, the pre-press is covered with an unvulcanized rubber sheet after cleaning, but after the outer peripheral surface of the steel cord is cleaned, it is coated with a coating material, and the outer peripheral surface is not exposed to air. You can also save it. In particular,
For example, if the outer periphery of the steel cord is stored in a state where it is covered with an unvulcanized rubber film by so-called dipping or pasting, the outer surface of the steel cord will not be exposed to air, so an unvulcanized rubber film will be used. Oxidation is avoided even when stored in the air in the covered state.

(iv) Not only in the case of storing or storing in an air atmosphere in which the temperature and humidity are controlled as in the above-described embodiment, the steel cord is washed in advance, zinc oxide that inhibits adhesion to rubber, etc. It is also possible to remove the adhesion inhibitor and store it in a closed container such as a drum in a nitrogen atmosphere or inert gas atmosphere so that the cord itself does not come into direct contact with air.

S Steel cord G Unvulcanized rubber sheet T1 Unvulcanized belt molded body T2 Vulcanized belt molded body 1 Conveyor belt manufacturing apparatus 11 Washing and drying unit 12 Prepress unit 13 Moving table 13A First moving table 13B Second Moving platform

Claims

A method for producing a conveyor belt having a galvanized steel cord as a core,
A cleaning and drying step of cleaning at least the outer peripheral surface of the steel cord with a cleaning liquid and drying,
A pre-press step for covering the steel cord after the washing and drying with an unvulcanized rubber sheet continuously with the washing and drying step, and integrating them prior to the vulcanization treatment,
A method for manufacturing a conveyor belt, comprising:
A method for producing a conveyor belt having a galvanized steel cord as a core,
A cleaning and drying step of cleaning at least the outer peripheral surface of the steel cord with a cleaning liquid and drying,
A coating process for coating the outer peripheral surface of the steel cord after the cleaning and drying process with a coating material in succession to the cleaning and drying process;
A pre-press process in which the steel cord coated in the coating process is covered with an unvulcanized rubber sheet and integrated prior to the vulcanization process;
A method for manufacturing a conveyor belt, comprising:
A method for producing a conveyor belt having a galvanized steel cord as a core,
A cleaning and drying step of cleaning at least the outer peripheral surface of the steel cord with a cleaning liquid and drying,
A storage step of storing the steel cord after washing and drying in an oxidation-inhibiting atmosphere continuously with the washing and drying step,
A pre-press step of covering the stored steel cord with an unvulcanized rubber sheet and integrating them prior to the vulcanization process;
A method for manufacturing a conveyor belt, comprising:
The conveyor belt according to claim 3, wherein the oxidation-inhibiting atmosphere is an air atmosphere having an atmospheric temperature of 20 to 30 ° C and a relative humidity of 60% or less, or an air atmosphere having an atmospheric temperature of 20 to 40 ° C and a relative humidity of 50% or less. Production method.
The conveyor belt according to claim 3, wherein the oxidation-inhibiting atmosphere is an air atmosphere having an atmospheric temperature of 20 to 35 ° C and a relative humidity of 50% or less, or an air atmosphere having an atmospheric temperature of 20 to 40 ° C and a relative humidity of 40% or less. Production method.
A conveyor belt for producing a conveyor belt having the steel cord as a core by pre-pressing the steel cord with an unvulcanized rubber sheet while applying a constant tension to the steel cord and feeding the steel cord. Manufacturing equipment,
A cleaning / drying unit for cleaning at least the outer peripheral surface of the steel cord with a cleaning liquid and drying;
A pre-press unit for covering the steel cords after washing and drying with the unvulcanized rubber sheet and integrating them;
A control means for controlling a series of operations by the washing and drying unit and the prepress unit, covering the steel cord after washing and drying with the unvulcanized rubber sheet prior to vulcanization, and integrating them. Conveyor belt manufacturing equipment.
The washing / drying unit and the prepress unit are provided on the first and second moving platforms, respectively.
One of the first and second moving platforms is provided so as to be movable along the first rail, and the other is provided so as to be movable along the second rail provided inside the first rail. ,
One of the first and second movable bases and a unit provided thereon are formed in a gate shape, and the other of the first and second movable bases and a unit provided thereon are The conveyor belt manufacturing apparatus according to claim 6, wherein the conveyor belt manufacturing apparatus is configured to be able to pass through one of the first and second moving platforms and a unit provided thereon.
The conveyor according to claim 6, wherein the cleaning / drying unit and the prepress unit are placed on the same moving table so that the cleaning / drying unit is closer to a feeding side of the steel cord than the prepress unit. Belt manufacturing equipment.