JPH0648530A - Wide belt - Google Patents

Abstract

PURPOSE:To provide a special thin plate-like wide belt which can travel at high speed by coming into pressure contact with a tooth shape roller and can endure a high temperature and is excellent in heat conductivity and can endure various severe conditions sufficiently by restraining a bite of a roller tooth shape in a belt surface. CONSTITUTION:A belt 1 presents such a specific shape as a thin plate-like wide shape, and a belt lengthwise directional spiral cord is used as a tension member 2, and reinforcing members 5 and 6 composed of cords extending in a belt width direction while being covered respectively with cover elastic layers 3 and 4, are arranged on both the obverse and the reverse of the tension member 2, and these tension members 2 and reinforcing members 5 and 6 are composed of a group of plural members juxtaposed respectively in the belt width direction. Joints 2a of these respective member butting shape tension members 2 and respective joints 5a, 5b, 6a and 6b of both the obverse and reverse reinforcing members 5 and 6 are dislocated positionally, and a heat-conductive particulate member 7 is mixed particularly in the reverse cover elastic layer 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wide belt, and more particularly to a wide belt for producing corrugated paper which is used by being incorporated in a part of a corrugating machine in a corrugated paper production line.

[0002]

2. Description of the Related Art In a conventional corrugated paperboard manufacturing apparatus, high temperature steam is fed into the inside of the corrugated paperboard, the surface of the corrugated paper is heated, and the corrugated core paper is corrugated and rolled up between a pair of toothed rolls meshing with each other. Starch glue is applied to the paste, and the core paper and liner paper after the corrugated mold with the glue are sent to a pressure bonding device which is a combination of heat resistant belts, rollers, felts, etc., in a separate rear line, The work of attaching the core paper and the liner paper is carried out. However, in the conventional corrugated paperboard manufacturing means, the work efficiency is largely reduced by first adopting the patterning step, the subsequent sticking step, the molding step and the multi-step step.

Thereafter, for the purpose of simplifying the mechanism and increasing the efficiency of the work, a corrugating process of corrugating with a pair of corrugating tooth rolls, the tooth rolls, and a wide belt arranged so as to come into contact with the corrugating rolls. A corrugated paperboard manufacturing apparatus has been proposed which is capable of accomplishing a series of the work of patterning core paper by combining and sticking with liner paper in an integrated manner.

That is, the improved corrugated paperboard manufacturing apparatus (11) has a core paper (13) between a pair of meshing tooth type rolls (12A) (12B) as shown in FIG. Is sent, both rolls (12A) (12B)
During the meshing process, the corrugated paper is applied to the core paper (13), and starch paste is applied to the top of the corrugated core paper (13) by the adhesive application device (14). A heating device (not shown) for evaporating and vaporizing the water impregnated in the corrugated paperboard and performing accurate patterning on the tooth roll (12B) surface on the side where the glue applying device (14) is attached. Endless belt mechanism (15) for pressure application, that is, a part of the wide belt (A) suspended between a pair of drum-shaped pulleys (16) (16) is arranged so as to be press-contactable while maintaining an arc-shaped contact area. Has been done. Liner paper (17) fed between the wide belt (A) and the tooth type roll (12B)
Is wound around a part of the tooth mold roll (12B) and is moving,
The corrugated paper (18) is completed by superposing it on the glued core paper (13A) and pressure-bonding it between the wide belt (1) and the tooth type roll (12B).

[0005]

The pressure belt used in this type of apparatus is in constant pressure contact with the tooth portion of the tooth type roll, is placed in a high temperature environment, and the object to be manufactured is a corrugated cardboard paper having a wide width. Therefore, the wide belt itself is required to withstand the load in the belt width direction. A wide belt having a wide shape and a small thickness has a peculiar shape, and when the rigidity in the belt width direction is insufficient, wrinkles occur during belt running, which also contributes to belt meandering. Therefore, conventionally, a steel belt is widely used as the wide belt for pressure application. However, this wide steel belt is expensive,
Also, in the event of an unexpected belt cutting accident, personal injury, large-scale damage to incidental equipment, and the adoption of steel belts makes the entire equipment larger, and steel belts have unique problems in terms of bending fatigue resistance, As described above, the corrugated paperboard making machine used for a part of the wide steel belt could not be sufficiently satisfied in terms of work efficiency as the line speed was increased.

The present invention is actually directed to a pressure belt used as a member of the corrugated paperboard manufacturing machine, and is capable of sufficiently dealing with the severe conditions described above, and the worst case of belt cutting. Even if there is, it is possible to reliably prevent the occurrence of personal injury and property damage accidents, more specifically adapt to the high speed running of the belt due to the improvement of work efficiency, and contribute to the noise reduction of equipment, An object of the present invention is to provide a wide belt for pressurization that can maintain sufficient rigidity in the width direction of the belt even with a wide belt and can secure sufficient thermal conductivity of the belt itself.

[0007]

In order to achieve the above object, a wide belt used as a component of a corrugated paperboard manufacturing apparatus has the following structure. This wide belt has a thin plate-like special shape whose thickness is extremely small compared to the lateral width of the belt, and the tensile body arranged in the approximate center of the belt has a spiral shape in the longitudinal direction of the belt. An integral reinforcing member composed of a cord, which covers the entire width of the belt disposed on both the front and back surfaces of the cord tensile body, is formed by a cord extending in the belt width direction, a sudar record, or a canvas, and the integral reinforcing members are the front and back covers, respectively. Covered by elastic layers, both cover elastic layers contain short fibers oriented in the width direction of the belt, and the back cover elastic layers are made of carbon black, metal powder granules, etc. It is characterized in that a powdery member is mixed.

Further, this wide belt has several kinds of deformation, and the reinforcing members arranged on both sides of the cord tensile member may be either the front side or the back side. Instead of one continuous spiral, the cord tensile body is composed of a plurality of cord tensile members arranged in the belt width direction, and the reinforcing members arranged on both front and back sides of the tensile body are also plural belts. It is composed of an assembly of reinforcing members arranged in the width direction, and at that time, adopts a configuration in which the joint position derived between a plurality of tensile members and the joint position derived between reinforcing members are intentionally shifted. Another feature is that the joint position between the front and back reinforcing members is intentionally shifted.

Further, the pair of reinforcing members arranged on both front and back surfaces of the cord tensile member can be limited to only one of them, and the folding also has a seam in each of the cord tensile member and the reinforcing member. Is characterized by adopting a structure in which the seam position is intentionally shifted. In any of the belt configurations, the thickness of the cover rubber on the surface side of the cord tension body is 1.0 mm or less, and the hardness thereof is JIS-
It is set to 85 ° or more in K-6301.

[0010]

EXAMPLES Next, specific examples of the wide belt according to the present invention will be described with reference to the drawings. FIG. 1 is an end view of a wide belt having a continuous cord tensile body embodying the present invention as seen from the cross direction of the belt, and FIG. 2 is an enlarged detailed view of a part of the belt shown in FIG. The wide belt according to the present invention is wide and extremely thin. Specifically, the width is about 20
The peculiarity of this belt is also shown in the shape of the thin plate belt, which is 00 mm or more and the wall thickness is about 5 mm or less.

The wide belt (1) has a tensile member (2) made of a cord having a low elongation and a high strength, specifically, aromatic polyamide (also known as aramid), polyester, nylon, steel and composite fibers thereof. The spinning cord that is configured and continuous in the belt longitudinal direction is formed in a seamless endless shape in the belt longitudinal direction. The cord diameter of the tensile body is 0.5 to 1.3 mm. The cord tension member (2) is covered with thin elastic layers (3) and (4) on both the front and back sides, respectively, and a pair of upper and lower belt reinforcing members integrally provided with lateral rigidity in the belt width direction (5). ) (6)
Are stacked.

Each of the reinforcing members (5) and (6) intersects the cord tension member (2) extending in the longitudinal direction of the belt and has a diameter or thickness of 0.5 to 1.0 m extending in the belt width direction.
The reinforcing members (5) and (6), which are composed of m cords, Suda records, canvas, and cover the entire width of the belt, are members for increasing the rigidity in the belt width direction. Like the tension body (2), it is composed of aromatic polyamide, polyester, nylon, steel and composite fibers thereof, and the like, while the reinforcing member (5)
Both the front and back cover elastic layers (3) and (4) covering (6) are made of heat resistant elastomer such as styrene-butadiene rubber,
Ethylene / propylene rubber, butyl rubber, fluorine rubber,
It is composed of hydrogenated nitrile rubber or synthetic resin such as polytetrafluoroethylene.

The front cover portion of the wide belt including the reinforcing member (5) covered with the front cover elastic layer (3) has a hardness of 85.
(JIS-K-6301) or more, and at the same time, the rigidity of the belt, especially in the width direction, which is a concern in a wide belt, is secured, and the belt cover portion on the surface side of the cord tension body (2) is secured. The wall thickness is specifically set to 1.0 mm or less.

On the other hand, in the elastic layer (4) of the back cover, the thermally conductive powdery granular material (7), for example, carbon black, metal granular material, etc., is added to 4 parts by weight of rubber or synthetic resin.
The belt is mixed and embedded in a proportion of 0 to 70 parts by weight to make the thermal conductivity of the belt itself good, and the thickness of the folded back cover portion is set in the range of 0.5 to 1.5 mm. If necessary, the heat-conductive powder-granular member (7) can be mixed in the front cover elastic layer (3). The above description is centered on the belt having a structure in which the reinforcing members (5) and (6) respectively covered with the elastic layers (3) and (4) of the front and back covers are laminated on both sides of the cord tensile body (2). However, a structure in which the reinforcing member is laminated on the front surface side of the cord tensile member (2) (see FIG. 3) or the reinforcing member is laminated only on the rear surface side of the cord tensile member (2) (see FIG. 4) is adopted. You can also

Further, in the above description centering on FIGS. 1 to 4, the cord tension member (2) and the cords on the front and back, the sudar records or the canvas reinforcing members (5) (6).
Has been described with a wide body which is wide enough to cover the entire width of the belt, but the wide belt according to this structure also has a large manufacturing facility, which in turn increases the cost of the wide belt itself. Therefore, using the conventional belt manufacturing equipment,
That is, a plurality of sets of spiral cord tensile members that match the narrow belt longitudinal direction are arranged side by side in the belt width direction, and the side edges of each cord tensile member are made into a butt shape, and the abutting portion has a resistance. Even if the front and back reinforcing members (5) and (6) are both derived from the tensioned seam (2a), several sets of small reinforcing members are integrally arranged in the belt width direction, and side edges of each reinforcing member are arranged. Composed with each other in a butt shape, and a reinforcing member seam (5a) at that portion
In a wide belt, an example of which is shown in FIG. 5, in which (5b), (6a), and (6b) are derived, the joint (2a) of the spiral cord tensile body (2) and the reinforcing member (5) are provided.
Reinforcing members (5) arranged so that the seam positions of the seams (5a), (5b), (6a), and (6b) of (6) are shifted from each other so that they do not coincide with each other in the vertical position, and are arranged as a pair of upper and lower parts.
Even at (6), the joints (5a) (5b), (6
Similarly, by intentionally shifting the positions a) and (6b), the cord tension body (2) and the upper and lower reinforcing members (5)
By intentionally shifting the position of each seam in (6), it is possible to provide a structure that prevents concentration of stress when the belt is bent.

The wide belt (1) having the above structure is
In a wide belt, the rigidity in the belt width direction, which is insufficient only with the cord tension body (2), is secured by the reinforcing members (5) and (6) arranged in the belt width direction so as to cover the entire belt width. It is possible to prevent wrinkles from being generated on the belt, which contributes to the belt meandering when the belt is running, and the cord tensile body (2) and the reinforcing members (5) and (6) are formed by a plurality of divided members. By intentionally shifting the seam position of the cord tension body and the reinforcing member, the seam part derived from the abutting part of the side edge is suppressed, and the occurrence of fragile parts of each member is suppressed, and overall The belt is tough.

This wide belt (1) is wound around a belt (A) wound around a drum-shaped pulley (16) (16) having a pair of heating devices, as shown in the schematic example in FIG. ), The moisture impregnated in the corrugated board component material is subjected to evaporation and vaporization through a pulley and a wide belt (1) which reaches about 160 ° C. Molding proceeds. In order to allow the belt itself to retain this high temperature, the thermal conductivity of the belt itself is ensured by a thermally conductive powdery material such as carbon black (7) mixed in the elastic layer (4) of the back cover of the belt. There is.

When the wide belt (1) is blended with 100 parts by weight of both front and back cover rubbers and carbon black, 50 parts by weight, and the thickness of the elastic layer of the front cover is 0.6.
mm, the thickness of the elastic layer of the back cover is 1.0 mm, the diameter of the tensile body cord is 1.3 mm, the thickness of both the front and back reinforcing members is 0.9 mm, and the total thickness of the wide belt is 4.7 mm. The surface hardness is 85 ° or more, and 20 parts by weight of the aromatic polyamide short fibers in the surface cover layer are mixed with 100 parts by weight of the surface cover layer. The temperature of the drum-shaped pulley around which this wide belt (1) is hung is about 1
Wide belt with carbon black blended in the back cover rubber layer after setting the temperature to 80 ° C and 3 minutes after running the belt, wide belt with carbon black blended in both front and back cover rubber layers and carbon black blended in both front and back cover rubber layers The surface temperature of each belt was measured using three types of wide belts that were not used, and the results shown in [Table 1] below were obtained. From this result, it was confirmed that the surface temperature of the belt greatly changed depending on the presence or absence of the carbon black compounded and the position of the carbon black compounded.

[Table 1]

Further, a core paper and a liner paper are sequentially supplied onto a wide belt (1) which is hung on a drum pulley and travels at a maximum speed of 400 m / min, and is pressed against the belt surface. With respect to the strong pressure contact force of the tooth type roll (12) that performs corrugating and pressure bonding work on the core paper and the liner paper, this is dealt with by the belt surface cover rubber layer having a hardness of 85 ° or more. In addition, when the amount of biting of the tooth profile part of the roll due to the pressure contact of the tooth profile roll is large in the belt surface cover rubber layer, cutting of the core paper and liner paper also occurs. The thickness of the front cover rubber layer is 1.0m in order to suppress the biting amount of the part.
This is dealt with by setting m or less.

Further, in the wide belt, by adopting the endless cord tension member which is seamless in the longitudinal direction of the belt in particular, the bonding using the tooth type roll executed on the belt surface, With respect to a series of severe operations such as a patterning operation, the belt has a small effect and is greatly effective in suppressing the occurrence of a step in the longitudinal direction of the belt, which is a great obstacle to the bonding operation. Further, the presence of the reinforcing members arranged in the belt width direction increases the rigidity of the belt itself in the width direction, and is a wide and thin plate-shaped belt, which is a great obstacle to the smooth production of corrugated paperboard. The local wrinkles that occur on the belt are prevented, ensuring smooth running of the belt.

[0021]

EFFECTS OF THE INVENTION The wide belt according to the present invention is wide and at the same time its wall thickness is abnormally thin in comparison with the belt width. Further, this belt always maintains a strong pressure contact state with the tooth type roll, The belt itself is expected to have a unique effect of helping the evaporation and evaporation of the water impregnated in the corrugated paper, and the belt is hung and run on the drum-shaped pulley that has been further heated. In order to facilitate smooth pasting work, there is no step on the surface of the belt, especially in the longitudinal direction of the belt, smooth running is expected, and it is possible to handle a number of severe usage conditions, and also from the aspect of improving work efficiency. Even if it is used under the above-mentioned severe conditions that can withstand high-speed traveling sufficiently, and even if it is used under the severe conditions mentioned above, wrinkles are generated during belt traveling by securing rigidity in the belt width direction and suppressing deformation. Is also prevented, and the occurrence of meandering caused by this is surely prevented, strong molding to the core paper and strong adhesion between the core paper and the liner paper can be realized, further reducing the noise of the device It is a product that can greatly contribute to the special purpose of manufacturing corrugated cardboard. Also, even in the worst case of belt cutting, in comparison with the conventional steel wide belt,
In terms of cost, many excellent effects can be expected in terms of preventing personal injury and damage to peripheral equipment.

[Brief description of drawings]

FIG. 1 is an end view of a wide belt having a continuous cord tensile body embodying the present invention as seen from a belt transverse direction.

FIG. 2 is an enlarged detailed view of a part of the belt shown in FIG.

FIG. 3 is a view corresponding to FIG. 1 showing another embodiment.

FIG. 4 is a view corresponding to FIG. 1 showing still another embodiment.

FIG. 5 is an end view of a wide belt having a plurality of cord tension members according to the present invention, as viewed in a belt transverse direction.

6 is an enlarged detail view of a portion of the belt shown in FIG.

FIG. 7 is a view corresponding to FIG. 5 showing another embodiment.

FIG. 8 is a view corresponding to FIG. 5 showing still another embodiment.

FIG. 9 is a schematic front view of a corrugated paperboard manufacturing apparatus incorporating a wide belt.

[Explanation of symbols]

 1 Wide Belt 2 Cord Tensile Body 2a Joint of Cord Tensile Body 3 Front Cover Elastic Layer 4 Back Cover Elastic Layer 5 Upper Reinforcing Member 5a, 5b Upper Reinforcing Member Joint 6 Lower Reinforcing Member 6a, 6b Lower Reinforcing Member Joint 7 Thermal conduction milling granular material

Claims (8)

[Claims] 1. A belt having a wide width and a thin plate shape, wherein a tensile member arranged substantially in the center of the belt is composed of a spiral cord extending in the longitudinal direction of the belt. An integral reinforcing member that can cover the entire width of the belt and extends in the belt width direction is covered with elastic layers on both front and back covers, and a thermal conductive powder-granular member is mixed in the elastic layers on the back cover. belt. 2. A belt having a wide width and a thin plate shape, wherein the tensile member arranged substantially in the center of the belt is composed of a spiral cord in the longitudinal direction of the belt, and both sides of the cord tensile member are arranged. An integral reinforcing member extending in the belt width direction capable of covering the entire width of the belt is embedded in either the front or back of the elastic layer of the belt cover arranged in A wide belt in which a short fiber having the above is blended, and a heat conductive powdery material is blended in the elastic layer of the back cover. 3. A belt having a wide width and a thin plate shape, and a tensile member arranged at a substantially central portion of the belt is constituted by a spiral cord in a belt longitudinal direction, and the cord tensile members are a plurality of belts. Consists of tensile bodies arranged in the width direction,
In the seam portion of each of these cord tension members, the seams of a plurality of reinforcing members arranged in the belt width direction and arranged on both front and back surfaces of the cord tension member are displaced in position. 1 wide belt. 4. A belt having a wide width and a thin plate shape, wherein a tensile member arranged at a substantially central portion of the belt is composed of a spiral cord in a longitudinal direction of the belt, and the cord tensile member has a plurality of cords. Consists of cord tension members arranged in the belt width direction, and at the joints of these cord tension members,
3. The wide belt according to claim 2, wherein the joints of a plurality of reinforcing members arranged in the belt width direction and arranged on one of the front and back sides of the cord tensile member are extended in the belt width direction. 5. The wide belt according to claim 3, wherein the joints of the front and back reinforcing members arranged on both sides of the cord tensile member are displaced in position. 6. The cord reinforcing member, which is disposed on at least one of the front and back surfaces of the cord tensile member in the belt width direction, is formed of any one of a cord, a sudar record and a canvas extending in the belt width direction. The wide belt according to any one of items 1 to 5. 7. The front cover layer on the surface side of the cord tensile body is set to have a thickness of 1.0 mm or less and a hardness of 85 ° or more, according to any one of claims 1 to 6. Wide belt as described. 8. The wide belt according to claim 1, wherein the heat-conductive powder-granular member mixed in the elastic layer of the back cover is selected from carbon black and metal powder particles.