WO2011036887A1

WO2011036887A1 - Method for producing regenerative conveyor belt

Info

Publication number: WO2011036887A1
Application number: PCT/JP2010/005767
Authority: WO
Inventors: 登関根
Original assignee: 株式会社ブリヂストン
Priority date: 2009-09-28
Filing date: 2010-09-24
Publication date: 2011-03-31
Also published as: JP2011068481A

Abstract

Disclosed is a method for producing a regenerative conveyor belt, which prevents a reduction in operating efficiency caused by the stop of a conveyor belt over a long period, an increase in equipment cost and product cost due to ensuring large storage space, a price increase in a regenerative conveyor belt associated with the disposal of un-vulcanized rubber, or the like. Half-cut sections (2a) of a standard general rubber sheet (2) having a constant width and thickness are arranged on a table belt (1), and in a state in which an un-vulcanized sheet consisting of a functional rubber is provided between at least the half-cut standard general rubber sheets (2a) so that the un-vulcanized sheet has a thickness of not less than the thickness of the half-cut standard general rubber sheets (2a), vulcanization is applied to the entire sheets.

Description

Rejuvenation conveyor belt manufacturing method

The present invention relates to a method for manufacturing a rehabilitation conveyor belt, and in particular, the conveyor belt can be rehabilitated inexpensively and quickly, and the desired physical properties can be imparted to the conveying surface of the conveyor belt. It proposes a technology that can be used.

As a conveyor belt rehabilitation technique, as disclosed in Patent Document 1, the uneven surface portion of the used conveyor belt is peeled off and removed by cutting or the like, and an unvulcanized cover rubber is laminated on the removed portion. In this state, the unvulcanized cover rubber is vulcanized, and as disclosed in

Patent Documents

2 and 3, the uneven surface portion of the used conveyor belt is peeled off. For example, a vulcanized cover rubber is bonded with an adhesive.

Japanese Utility Model 2-64508 microfilm Japanese Unexamined Patent Publication No. 59-194427 Japanese Patent Laid-Open No. 1-150609

However, depending on the technique described in Patent Document 1, it has the rubber quality, width, thickness, length, etc. selected according to the contents of the recap processing after stripping off the surface of the used conveyor belt, etc. Since it is necessary to post-roll the unvulcanized cover rubber afterwards, it takes a long time to secure the required unvulcanized cover rubber, and the conveyor belt cannot be quickly recapted. There is a problem in work efficiency that the conveyor belt is forced to stop for a long time, while on the other hand, unvulcanized cover rubber having various widths, thicknesses, lengths, etc. is pre-manufactured and stored, When dealing with rapid recapping, large inventory space is inevitable and uncured cover rubber that has not been exhausted during the months of use is discarded. Made for the price of rehabilitation conveyor belt there is a problem that will be self bets increases.

And in the techniques described in

Patent Documents

2 and 3, since the vulcanized cover rubber is applied to the peeled off part of the used conveyor, the cover rubber of the case where the unvulcanized cover rubber is used is used. Although there are no problems such as production waiting time and usage time limit, the vulcanized cover rubber with the rubber quality, width, thickness, length, etc. corresponding to the stripped part is uniform, so various dimensions In the case of stocking vulcanized cover rubber or the like in advance, this also requires a large storage space and the like, and there has been a problem that an increase in equipment cost and, in turn, an increase in the price of the rehabilitation conveyor belt cannot be denied.

The present invention aims to solve such problems of the prior art, the purpose of which is to reduce the work efficiency due to long-term stoppage of the conveyor belt, and An object of the present invention is to provide a method for manufacturing a rehabilitating conveyor belt that does not cause an increase in equipment cost and product cost by securing a large storage space, and an increase in the price of rehabilitating conveyor belt due to disposal of unvulcanized rubber.

In the first manufacturing method of the rehabilitation conveyor belt of the present invention, the uneven surface portion of the conveyor belt is removed by stripping, cutting, or the like, for example, on a portion that is not so important in terms of function, One or more types of standard general-purpose rubber sheets having a certain width and thickness, for example, standardized or standardized, are disposed, and at least between the standard general-purpose rubber sheets, in other words, For the purpose of dimensional adjustment, for example, unapplied constant dimensions, made of functional rubber that can perform the required functions of flame retardancy, heat resistance, cut resistance, wear resistance, etc. The entire vulcanization is performed in a state in which the sulfur sheet is disposed with a thickness equal to or larger than that of the standard general-purpose rubber sheet.

Here, the standard general-purpose rubber sheet can be formed of an unvulcanized or vulcanized rubber sheet such as NR or SBR.
When a vulcanized rubber sheet is used as the standard general-purpose rubber sheet, an unvulcanized thin adhesive rubber layer is interposed between the standard general-purpose rubber sheet and the base belt and between the standard general-purpose rubber sheets. It is preferable to provide them in order to realize sufficient vulcanization adhesion. However, when not sticking to vulcanized adhesion, an adhesive layer may be interposed instead of the unvulcanized adhesive rubber layer.

By the way, in this method, for example, standardized, standardized, etc., unit regular general-purpose rubber sheet or half-cut regular general-purpose rubber sheet half-cut in the width direction or thickness direction, or both, each of the base belt Preferably, an unvulcanized sheet made of functional rubber is disposed at least in the central region of the width of the base belt between the regular general-purpose rubber sheets.

Also, here, the unvulcanized sheet made of functional rubber can be disposed between the regular general-purpose rubber sheet and on the regular general-purpose rubber sheet.

Further, the standard general-purpose rubber sheet can be laminated and aligned with each side edge of the base belt in relation to the thickness of the removed surface rubber portion.

According to another method of manufacturing the retreading conveyor belt of the present invention, a vulcanized fixed general-purpose rubber sheet is disposed in the center region in the width direction of the base belt with an unvulcanized adhesive rubber layer interposed therebetween. The entire general-purpose general-purpose rubber sheet is covered with an unvulcanized rubber sheet, and is vulcanized in a state of being embedded in the unvulcanized rubber sheet.

In the first manufacturing method of the present invention, a portion that is not so important for the conveyance function of the object to be conveyed, such as a side portion on the base belt, has been standardized or standardized as having a certain width and thickness. While arranging the regular general-purpose rubber sheet, the part between the regular general-purpose rubber sheets, which is important for the transport function, is composed of a functional rubber having physical properties that can exhibit any required function, for dimension adjustment, This is also possible by simply preparing in advance a standard general-purpose rubber sheet having a predetermined size and a non-vulcanized rubber sheet having a predetermined size by arranging a standardized, standardized, etc., unvulcanized rubber sheet. Regardless of the removal mode of the uneven surface portion of the used conveyor belt, the conveyor belt is properly used while giving the required functional properties to the conveyor belt's transfer function portion with functional rubber. Since it can be rehabilitated, a uniform unvulcanized or vulcanized cover, which is post-mortem or pre-manufactured according to the belt surface removal mode etc. as described in the prior art No longer need rubber, stop conveyor belt for recapping for a long period of time, do not need large stock of unvulcanized or vulcanized cover rubber, etc. Also, due to pre-production, the time limit has passed It is no longer necessary to dispose of the unvulcanized cover rubber, effectively preventing a decrease in transport work efficiency, preventing an increase in equipment costs and product costs due to securing a large storage space, and An increase in the price of the rehabilitation conveyor belt due to the disposal of the vulcanized rubber can also be effectively prevented.

In addition, in this method, a functional rubber having required physical properties such as flame retardancy, heat resistance, cut resistance, and wear resistance is disposed in a portion that is frequently contacted with the object to be conveyed, thereby conveying the object. It is possible to effectively suppress damage to the surface of the conveyor belt that comes into contact with an object and greatly improve the durability of the conveyor belt.
On the other hand, in order to secure a required rubber volume, a relatively inexpensive standard general-purpose rubber sheet made of natural rubber, SBR, or the like is disposed in a portion where the contact frequency with the conveyed object is low. By securing the required rubber volume, it is possible to effectively reduce the amount of relatively expensive functional rubber used and to reduce the cost of the rehabilitation conveyor belt.

By the way, in carrying out such a method, the standard general-purpose rubber sheet having a certain width and thickness and standardized and standardized can be unvulcanized or vulcanized. In particular, according to the latter, the regular general-purpose rubber sheet can be used for how to rehabilitate the conveyor belt. As a result, the usage time is drastically increased, and unpleasant joy of disposal can be almost completely removed.
In this case, however, an unvulcanized adhesive rubber layer is interposed between the fixed general-purpose rubber sheet and the base belt and the fixed general-purpose rubber sheet with sufficient strength by the vulcanization process. It becomes necessary to do.

The above-described operations and effects of the first method are as follows. At least one of the unit-type fixed general-purpose rubber sheet and the half-cut fixed-type general-purpose rubber sheet cut in half in either the width direction or the thickness direction is used as a base belt. An unvulcanized sheet made of functional rubber, which exhibits the required physical properties, is disposed at least in the central region of the width of the base belt between the regular general-purpose rubber sheets. This is especially true in cases.

Here, when the object to be conveyed is in wide contact with the entire width of the conveying surface of the conveyor belt, the unvulcanized sheet made of functional rubber is not only between the regular general-purpose rubber sheets, but also their regular general-purpose sheets. It can also be laid on the rubber sheet. According to this, the general-purpose general-purpose rubber sheet functions as a volume member that does not come into contact with the object to be conveyed, and gives excellent durability to the entire conveying surface of the conveyor belt. can do.

By the way, the fixed general-purpose rubber sheets arranged in alignment with the respective side edges of the base belt can be laminated with each other in relation to the thickness of the removed surface rubber portion. According to the present invention, it is possible to advantageously prevent the increase in the cost of the rehabilitating conveyor belt by removing a large part of the thickness of the conveyor belt and sufficiently reducing the amount of the unvulcanized sheet made of functional rubber. .

In another method of the present invention, the unvulcanized rubber sheet functions by covering a vulcanized fixed general-purpose rubber sheet disposed in the center region in the width direction of the base belt with an unvulcanized rubber sheet and embedding it inside. Regardless of whether or not it is made of a functional rubber, there is a regular general-purpose rubber sheet that has already been vulcanized at the center where the temperature rise is most delayed when vulcanized from the outside. There is an advantage that productivity can be improved by greatly shortening the vulcanization time.

In this case, an unvulcanized adhesive rubber layer is interposed between the standard general-purpose rubber sheet and the base belt and between the standard general-purpose rubber sheets. Since the adhesive rubber layer is vulcanized early with a small amount of supplied heat, the presence of the adhesive rubber layer does not hinder the shortening of the vulcanization time.

It is width direction sectional drawing which shows embodiment of the 1st method of this invention. It is width direction sectional drawing which shows other embodiment. It is a cross-sectional view of the belt before vulcanization showing other embodiments. It is width direction sectional drawing which shows embodiment of this 2nd method of this invention.

1 belt 2 fixed general-purpose rubber sheet 3 unvulcanized sheet 4, 6 unvulcanized conveyor belt 5

unvulcanized rubber sheet

7, 8 unvulcanized adhesive rubber layer

In the embodiment shown in FIG. 1, reference numeral 1 in the figure shows a base belt after removing the uneven surface portion of the used conveyor belt, and 2 is a standardized or standardized general purpose standard having a certain width and thickness. A rubber sheet 3 indicates a non-vulcanized sheet made of a functional rubber, which has a certain width and thickness, and is a standardized or standardized material capable of exhibiting a required function.

In the figure, the standard general-purpose rubber sheet 2 is half-cut at the central portion in the width direction in an inclined state as shown by a broken line in the figure, and each half-cut general-purpose rubber sheet 2a is 1 is arranged in alignment with each side edge of the base belt 1 at each side portion of the belt 1, and also functions as a rubber for adjusting dimensions between the opposed surfaces of the half-cut fixed general-purpose rubber sheet 2a. The unvulcanized sheet 3 made of rubber is cut and embedded in a required form, and the surface of the embedded unvulcanized sheet 3 is set to the same level as the surface of each adjacent half-cut fixed general-purpose rubber sheet 2a. .

The unvulcanized conveyor belt 4 thus laminated is then vulcanized and formed over the entire area, so that necessary physical properties such as cut resistance and abrasion resistance are provided in the area where the unvulcanized sheet 3 is disposed. Therefore, the rehabilitation conveyor belt is excellent in durability.
In this case, the standard general-purpose rubber sheet 2 can be made of inexpensive natural rubber, SBR or the like that does not have special physical properties. Can be made sufficiently inexpensive.

By the way, the fixed general-purpose rubber sheet 2 can be unvulcanized or vulcanized. According to the latter, between the half-cut fixed general-purpose rubber sheet 2 a and the base belt 1. Although it is necessary to interpose an adhesive rubber layer, the service life of the standard general-purpose rubber sheet 2 can be greatly extended as compared with that of the unvulcanized one. Special sealing means for preventing heat flow of the unvulcanized sheet 3 and the half-cut general-purpose rubber sheet 2a when the unvulcanized conveyor belt 4 is vulcanized. There is an advantage that it is not necessary to provide the like.
Here, the base belt 1 and the unvulcanized sheet 3, and the half-cut fixed general-purpose rubber sheet 2a and the unvulcanized sheet 3 are used when the unvulcanized conveyor belt 4 is vulcanized without an adhesive rubber layer interposed. Vulcanized and bonded sufficiently firmly.

FIG. 2 is a cross-sectional view in the belt width direction showing another embodiment, in which, in addition to the above-mentioned in relation to FIG. It is also arranged on the surface of the general-purpose rubber sheet 2a. According to this embodiment, each half-cut fixed-type general-purpose rubber sheet 2a has a volume that reduces the required volume of the unvulcanized sheet 3, and thus the rehabilitation cost. It will function as a member.
On the other hand, the unvulcanized sheet 3 here gives the rehabilitated conveyor belt the required surface properties over its entire width, so that the conveyor belt is in contact with the object to be conveyed. Overall, excellent durability can be exhibited based on the required physical properties.

By the way, in the place shown in FIGS. 1 and 2, when the semi-cut line in the width direction of the standard general-purpose rubber sheet 2 and, as a result, the half-cut surface is an inclined surface as shown, the general-purpose rubber sheet 2 is Compared with the case of half-cutting at right angles, the contact area between the half-cut fixed general-purpose rubber sheet 2a and the unvulcanized sheet 3 and thus the vulcanized adhesion area should be secured to increase the adhesive strength between them both more sufficiently. Can do.

In the cross-sectional view of the unvulcanized conveyor belt in FIG. 3 showing still another embodiment, the one shown in FIG. 3 (a) is a half-cut type general-purpose type arranged in alignment with each side edge of the base belt 1. Two rubber sheets 2a are stacked on each other, and the one shown in FIG. 3 (b) is on each unit-shaped general-purpose rubber sheet 2 arranged in alignment with each side edge of the base belt 1. Further, half-cut regular general-purpose rubber sheets 2a are laminated.
In any of these cases, the unvulcanized sheet 3 made of functional rubber is embedded between the standard general-

purpose rubber sheets

2a and 2 up to the same level as the surface of the standard general-

purpose rubber sheets

2a and 2. However, the arrangement level of the unvulcanized sheet 3 may be set to a level exceeding the surface level of the standard general-

purpose rubber sheets

2a and 2a as indicated by phantom lines in FIGS. 3 (a) and 3 (b). it can.

The unvulcanized conveyor belt 4 shown in FIG. 3 (c) has two unit-shaped general-purpose rubber sheets 2 arranged on the base belt 1 with the side edge positions aligned, and two unit-shaped general-purpose rubber sheets. The unvulcanized sheet 3 is appropriately cut and disposed between the rubber sheets 2 and on the surface of the rubber sheet 2.

FIG. 4 is a cross-sectional view of an unvulcanized conveyor belt showing an embodiment of the second method of the present invention. This is a fixed general-purpose rubber that has been vulcanized in the center region in the width direction of the base belt 1. The sheet 2 is disposed, and the entire fixed general-purpose rubber sheet 2 is covered with an unvulcanized rubber sheet 5 having a certain width and thickness.
According to this, regardless of whether or not the unvulcanized rubber sheet 5 is a functional rubber that provides specific physical properties, the regular general-purpose rubber sheet 2 in the center is vulcanized as described above. Thus, the vulcanization time for the unvulcanized conveyor belt 6 can be greatly shortened as compared with the case where the vulcanization time is sufficiently vulcanized to the center portion thereof.

Here, in the unvulcanized conveyor belt 6 shown in FIG. 4A, a single sheet of general-purpose rubber sheet 2 is placed in the center region in the width direction of the base belt 1 with a thin unvulcanized adhesive rubber layer 7 interposed therebetween. The fixed general-purpose rubber sheet 2 is covered with an unvulcanized rubber sheet 5, and the conveyor belt 6 shown in FIGS. 4B and 4C is a vulcanized fixed general-purpose rubber sheet 2. The arrangement mode is changed.

That is, the conveyor belt 6 shown in FIG. 4 (b) has an unvulcanized adhesive rubber layer 7 in a parallel position between two regular general-purpose rubber sheets 2 in the center region in the width direction of the base belt 1. The conveyor belt 6 shown in FIG. 4 (c) has two other general-purpose rubber sheets 2 on the two standard general-purpose rubber sheets 2 shown in FIG. 4 (b). These are aligned and arranged through the unvulcanized adhesive rubber layer 8.
Incidentally, as shown in FIGS. 4B and 4C, it is preferable that an unvulcanized adhesive rubber layer is also interposed between the side surfaces of the two regular general-purpose rubber sheets 2 adjacent to each other.

Claims

A regular general-purpose rubber sheet having a certain width and thickness is disposed on the base belt, and an unvulcanized sheet made of functional rubber is disposed between at least the regular general-purpose rubber sheet and the thickness of the standard general-purpose rubber sheet. The manufacturing method of the rehabilitation conveyor belt which vulcanizes the whole in the state arrange | positioned by the above thickness.
The method for producing a rehabilitation conveyor belt according to claim 1, wherein the standard general-purpose rubber sheet is formed of an unvulcanized or vulcanized rubber sheet.
At least one of the unit general-purpose rubber sheet and the half-cut standard general-purpose rubber sheet is arranged in alignment with the respective side edges of the base belt, and at least between the standard general-purpose rubber sheet, the functional rubber is not formed. The manufacturing method of the rehabilitation conveyor belt of Claim 1 or 2 which arrange | positions a vulcanization sheet.
The method for producing a rehabilitation conveyor belt according to any one of claims 1 to 3, wherein an unvulcanized sheet made of functional rubber is disposed between the regular general-purpose rubber sheet and on the regular general-purpose rubber sheet.
The method for manufacturing a rehabilitation conveyor belt according to any one of claims 1 to 4, wherein the regular general-purpose rubber sheet is laminated and arranged on each side edge of the base belt.
In the center region in the width direction of the base belt, a vulcanized fixed general-purpose rubber sheet is disposed via an unvulcanized adhesive rubber layer, and the entire fixed general-purpose rubber sheet is covered with an unvulcanized rubber sheet. A method for manufacturing a rehabilitation conveyor belt, which is vulcanized as a whole.