JPH0679814B2 - Conveyor belt molding vulcanization method and machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor belt molding vulcanizing method and a machine therefor capable of continuously molding and vulcanizing a conveyor belt whose side edges are inclined.

[0002]

2. Description of the Related Art First, a conveyor belt manufactured by the method and machine of the present invention is shown in FIG. The conveyor belt 102 travels in the pipe 101, and the side edge thereof is an inclined portion 103. The transported material scattered outside the conveyor belt 102 slides down from the inclined portion 103 and is collected in the conveyor belt 102. In the manufacturing process of the conveyor belt 102, it is necessary to cut the side edge of the conveyor belt 102 to form the inclined portion 103 having the angle α.

A cutting device such as a round blade or a band-shaped cutting tool is used to form the inclined portion 103. However, since deeper cutting and a higher cutting accuracy are required, severer conditions than the conventional cutting device are used. Becomes It is empirically known that a certain feed rate is required to improve the normal cutting accuracy. Therefore, the production speed of the conveyor belt molding vulcanizer called the rotocure method is the feed rate required at the time of cutting (usually 100
0mm / min or more is not required),
The belt produced by the conveyor belt molding vulcanizer was once wound up and cut in a separate process. That is, the ears were cut with a series of equipment configurations of a feeding machine, a cutting device, a drawing roll, and a winding machine to obtain the conveyor belt of FIG.

[0004]

Since the above-mentioned cutting device is a separate process from the conveyor belt molding vulcanizer, it has a problem that it is troublesome to carry it on the way and the productivity is inferior. In addition, in order to cut the ears in the course of unwinding and winding the belt in a separate process, it is necessary to have some margin for the width of the belt, and there is a problem that the ears to be cut increase and the yield decreases. It was

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a conveyor belt molding vulcanizing method and a machine therefor having high productivity and high yield. It is about to be provided.

[0006]

In order to achieve the above object, the conveyor belt molding vulcanizing method of the present invention comprises a heating roll disposed between a pressure roll and a drive roll, and the rolls are wound around these rolls in order. In the conveyor belt molding vulcanization method to be a vulcanized belt that is vulcanized, the vulcanized high temperature belt is floated from the drive roll with a pair of guide rolls, and the floated belt is used as a drive roll with a press roll to regulate thermal contraction. The belts that are nipped in relation to each other and floated from the driving roll and are tensioned at a high temperature are cut at a predetermined interval in the running direction by a sloping belt-like blade to make a plurality of conveyor belts with side edges sloping.

In the conveyor belt molding vulcanizer of the present invention, a heating roll is arranged between the pressure roll and the driving roll, and a belt having a width of plural conveyor belts is wound around these rolls in sequence. In the conveyor belt molding vulcanizer to be, a pair of guide rolls for floating the belt with respect to the drive roll and a pressing roll for nipping the belt are sequentially arranged, and between the pair of guide rolls, the side edge of the conveyor belt is inclined. A cutting device for projecting belt-shaped blades inclined at an angle corresponding to a portion at predetermined intervals corresponding to the conveyor belt width is provided.

[0008]

Function: The belt immediately after vulcanization is kept at a high temperature of about 100 ° C., and the heat shrinkage of the belt is regulated by the pressing rolls so that a strong tension is exerted on the belt. When this belt is floated from the drive roll by a pair of guide rolls and a strip-shaped blade is inserted and cut, the belt can be cut accurately even if the feeding speed of the belt is low. Further, since the belt whose width direction is regulated by the pressure roll, the heating roll, and the drive roll is cut, the band-shaped blade can be set at a position where the ear portion to be cut is minimized.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing the method of the present invention and the machine of the present invention. First, the machine of the present invention will be described, and then the method of the present invention will be described.

In FIG. 1, 1 is a pressure roll, 2 is a heating roll, 3 is a drive roll, 4 is a tension roll, and 5 is a steel band. From these, a conveyor belt molding vulcanizer called a roto cure system is constructed. Has been done.
The pressure roll 1 is movable in the arrow direction 7 with respect to the heating roll 2. The heating roll 2 is positioned between the pressure roll 1 and the drive roll 3 so as to contact both rolls 1 and 3,
The belt 8 pressed against the surface of the heating roll 2 by the steel band 5 is heated and pressed for vulcanization. The drive roll 3 transmits a rotational drive force via a steel band 5 wound around each roll 1, 2, 4. Tension roll 4
Is for applying an appropriate tension to the steel band 5, and is movable in the direction of arrow 9.

Although the above-mentioned machine is known as a roto-car type machine, a pair of guide rolls 10 and 11 are arranged above and below the driving roll 3 as the conveyor belt molding vulcanizer of the present invention. Is different from the conventional machine in that the pressing roll 12 is disposed above the sheet and the cutting device 13 is disposed between the pair of guide rolls 10 and 11.
The guide rolls 10 and 11 float the vulcanized belt 8 from the drive roll 3 and form a space into which the strip-shaped blade of the cutting device 13 is inserted. The press roll 12 is movable in the direction of the arrow 18, and the vulcanized belt 8 is nipped between the drive roll 3 and the press roll 12 so as not to slip.

FIG. 2 is a sectional view taken along the line XX of FIG. 1, which explains the arrangement of the band-shaped blades 17 in the cutting device 13. Slide stand 1 on rail 14 parallel to belt 8
Reference numerals 5 and 16 are attached so as to be slidable in the left-right direction. The strip-shaped blades 17 are attached to the slide table 15 on the center side so as to incline so as to intersect with each other, and are attached to the slide tables 16 on both sides so as to incline toward the inside of the strip-shaped blades 17. The inclination angle α of the belt-shaped blade 17 from 0 ° to 90 ° is equal to the angle α of the inclined portion 103 of the conveyor belt 102. The slide bases 15 and 16 are arranged so that the conveyor belt 102 has a predetermined length L.

Next, a conveyor belt molding and vulcanizing method using the above machine will be described with reference to FIGS. 1 and 2. Figure 1
In, the unvulcanized belt 8 is conveyed from the pressure roll 1 through the heating roll 2 to the drive roll 3 together with the steel band 5 in a wound state. Then, the belt 8 before vulcanization passes between the pressure roll 1 and the heating roll 2, and the belt 8 pressed against the surface of the heating roll 2 by the steel band 5 is heated and pressurized to be vulcanized. The vulcanized belt 8 is floated from the drive roll 3 and the steel band 5 by the guide rolls 10 and 11 and cooled. The cooled vulcanized belt 8 is nipped between the pressing roll 12 and the drive roll 3, and the peripheral speed of the inlet and outlet of the drive roll 3 is the same, so that thermal contraction due to cooling is regulated. A strong tension is applied to the vulcanized belt 8.
In addition, the vulcanized belt 8 near the guide rolls 10 and 11
Although it has been cooled, it maintains a high temperature of around 100 ° C and becomes soft. That is, when the belt-shaped blade is inserted into the vulcanized belt 8 which is soft and under strong tension, it is possible to accurately cut even at a slow speed of less than 1000 mm / min. That is, since the cutting is performed continuously with the molding and vulcanization of the belt, the process of winding the belt once and then cutting it with a feeding machine is omitted, and the productivity is greatly improved.

Further, as shown in FIG. 2, the rotocure type conveyor belt molding vulcanizer can handle wide belts and can mold and vulcanize two or more conveyor belt widths. Then, when the strip-shaped blades 17 are obliquely projected at predetermined intervals corresponding to the conveyor belt width L, the ear portion that causes a loss is minimized, and the yield is improved. This yield improves as the number of conveyor belts cut out from the belt increases.

Next, a cutting device 1 for holding the band-shaped blade
The structure of No. 3 will be described with reference to FIGS. The plate 20 is fixed to the slide base 15 which is slidable left and right with respect to the rail 14 with bolts 21, and the plate 20 is fixed with the slot 22.
Can be moved back and forth. This plate 2
Holders 25 and 26 are rotatably attached to shafts 23 and 24 that are provided so as to project at 0. The holders 25 and 26 are provided with slits 25a and 26a, respectively.
The strip-shaped cutting tool 17 sandwiched between the steel plates 27 is inserted into a and 26a, and is fixed by being pushed in with a bolt 28. As shown in FIG. 4, the holders 25 and 26 are displaced in the traveling direction of the vulcanized belt 8 so that the belt-shaped blades 17 and 17 do not interfere with each other.

In such a cutting device 13, the holder 2
By rotating 5 and 26 around the axes 23 and 24, the inclination angle α of the belt-shaped blade 17 from 0 ° to 90 ° can be adjusted. Further, by loosening the bolts 21 and moving the plate 20 back and forth, the strip-shaped blade 17 can be moved back and forth as a whole while maintaining a predetermined inclination angle. Further, when the slide base 15 is slid on the rail 14, the strip-shaped blade 1
7 can move left and right as a whole while maintaining a predetermined inclination angle. In this way, the band-shaped blade 17 can be moved back and forth and left and right, and the tilt angle can be adjusted. By utilizing this adjustment function, it is possible to minimize the cut ear portion (hatched portion).

[0017]

In the method of the present invention and the machine of the present invention, the belt at high temperature immediately after vulcanization is placed in a tension state in which a strong tension is applied, lifted from the drive roll, and the belt-like blade is inserted and cut. Even if it is late, it is cut accurately, and since a cutting device is incorporated in a part of the conveyor belt molding vulcanization device to perform the cutting after the molding vulcanization of the belt, the productivity is improved. Further, since the belt whose width direction is regulated by the pressure roll, the heating roll, and the drive roll is cut, the band-shaped blade can be set at a position where the ear portion to be cut is minimized, so that the yield is also improved.

[Brief description of drawings]

FIG. 1 is a schematic view showing the method of the present invention and the machine of the present invention.

FIG. 2 is a cross-sectional view taken along line XX of FIG. 1, showing an array of strip-shaped blades.

FIG. 3 is a top view of a cutting device that holds a band-shaped blade.

FIG. 4 is a side view of a cutting device that holds a band-shaped blade.

FIG. 5 is a sectional view of a conveyor belt.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pressurizing roll 2 Heating roll 3 Driving roll 8 Belt 10, 11 Guide roll 12 Holding roll 13 Cutting device 17 Belt-shaped blade 102 Conveyor belt 103 Inclined part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B29L 29:00 4F

Claims (2)

[Claims] 1. A conveyor belt molding vulcanization method in which a heating roll is arranged between a pressure roll and a drive roll, and the vulcanized belt is wound around these rolls in order and driven by a pair of guide rolls. The vulcanized high-temperature belt is floated from the roll, and the holding roll nips it against the drive roll to control the heat shrinkage of the floated belt. A method for forming and vulcanizing a conveyor belt, characterized in that a plurality of conveyor belts, each of which is cut in the running direction with a belt-shaped blade, and whose side edges are inclined. 2. A conveyor belt molding vulcanizer in which a heating roll is arranged between a pressure roll and a driving roll, and these rolls are wound in order to form a belt having a plurality of widths of the conveyor belt. A pair of guide rolls that float the belt with respect to the roll and a pressing roll that nips the belt are arranged in order, and between the pair of guide rolls,
A conveyor belt molding vulcanizer comprising: a cutting device in which belt-shaped blades inclined at an angle corresponding to the inclined portion of the side edge of the conveyor belt are projected at predetermined intervals corresponding to the width of the conveyor belt.