CN110745459B - Non-homogeneous section conveyer belt - Google Patents

Abstract

The invention discloses a non-homogeneous section conveyor belt which comprises an upper cover layer, a framework layer and a lower cover layer, wherein the upper cover layer is arranged on one side of the framework layer facing outwards, the lower cover layer is arranged on one side of the framework layer facing inwards, the upper cover layer comprises a middle rubber material section and side rubber material sections positioned on two sides of the middle rubber material section along the width direction of the upper cover layer, and the wear resistance of a covering rubber adopted by the middle rubber material section is higher than that of a covering rubber adopted by the side rubber material section. The invention changes the structure of the upper cover layer of the conveyer belt, adopts high-quality sizing materials with high wear resistance to the easily damaged parts positioned in the middle of the upper cover layer, ensures the durable service life of the middle part, adopts general sizing materials to the parts with lower wear degree of the edge part of the upper cover layer, and reduces the manufacturing cost as much as possible on the premise of ensuring the durable service life of the edge part.

Description

Non-homogeneous section conveyer belt

Technical Field

The invention relates to the technical field, in particular to a non-homogeneous section conveyer belt.

Background

The conveyer belt is suitable for transporting powdery and blocky materials between each working procedure and working section, is convenient and quick, has high production efficiency, and is a necessary means for continuously conveying mass materials in modern mass production.

The adhesive tape skeleton layer is an adhesive tape strong layer (one of steel wire ropes, steel wire nets, laminated canvas and whole core canvas) and bears the main pulling force in the operation process of the adhesive tape, and the upper and lower covering layers play a role in protecting the skeleton layer. Therefore, how to improve the service life of the covering layer, especially the durability of the sizing material in the middle of the working surface covering layer, is an important index for the design of the adhesive tape.

The existing adhesive tape standard and the applied technology are both of a flat structure (shown in figure 1), the cover layers are of homogeneous structures, the performances of all parts are consistent, the adhesive tape is not manufactured according to the actual needs of all parts, the parts which are easy to wear and tear are insufficient in adhesive material performance, the parts which are difficult to wear and tear are superfluous in adhesive material performance, the service life of the adhesive tape is insufficient, the cost is high, and the damaged parts of the adhesive tape are not the whole adhesive tape, so that a great amount of high-quality resources are wasted.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a non-homogeneous section conveyer belt.

In order to solve the technical problems, the technical scheme of the invention is as follows:

the utility model provides a non-homogeneous section conveyer belt, includes overburden, framework layer and lower overburden, the overburden sets up one side outwards of framework layer, the overburden sets up down one side inwards of framework layer, the overburden includes middle part sizing material section and the limit portion sizing material section that is located middle part sizing material section both sides along its width direction, the wear resistance of the overburden that middle part sizing material section adopted is higher than the wear resistance of the overburden that the limit portion sizing material section adopted.

As a preferable embodiment of the non-homogeneous section conveyor belt of the present invention, wherein: the side rubber material sections comprise a plurality of side rubber material sections along the width direction of the upper covering layer, and the wear resistance of the covering rubber adopted by the side rubber material sections is sequentially reduced from the middle part of the upper covering layer to the side part.

As a preferable embodiment of the non-homogeneous section conveyor belt of the present invention, wherein: the width of the middle sizing section accounts for 45-55% of the width of the upper covering layer.

The utility model provides a multi-roll calendering device for in producing above-mentioned arbitrary non-homogeneous section conveyer belt go up the overburden, including at least three can be around its axis pivoted compression roller, the axis of compression roller is all parallel to each other, the compression roller is arranged in proper order, makes adjacent two all form the roll gap between the compression roller, just the width of roll gap is progressively decreased in proper order, is located widest the front end of roll gap is provided with the baffle, the baffle is including being located the tip baffle at roll gap both ends and be located two piece at least middle part baffles between the tip baffle, the tip baffle with the one end of middle part baffle all stretches into in the roll gap.

As a preferable embodiment of the multi-roll calender of the present invention, wherein: the rear end of the narrowest roll gap is provided with an end baffle, and the end baffles are positioned at two ends of the corresponding roll gap.

As a preferable embodiment of the multi-roll calender of the present invention, wherein: the middle baffle plate and the end baffle plates can translate along the axial direction of the corresponding press roller.

As a preferable embodiment of the multi-roll calender of the present invention, wherein: the end baffle and the middle baffle are both made of stainless steel, and the thickness of the end baffle and the middle baffle is 5-10 mm.

The application method of the multi-roller calendaring device comprises the following steps:

s1: adjusting the positions of the end baffles and the middle baffle according to the widths of the middle rubber section and the edge rubber section of the produced conveyor belt;

s2: putting the sizing materials adopted by the sizing material sections at the middle part and the sizing material sections at the side parts between corresponding baffles, and rotating the press roller;

s3: the rubber material is pressed through the widest roll gap to form a rubber rough sheet, then the rubber rough sheet is sequentially pressed through the rear roll gap, and finally the narrowest roll gap is pressed to obtain the rubber sheet;

s4: and processing and cutting the rubber film to obtain the upper covering layer.

The beneficial effects of the invention are as follows:

(1) The invention changes the structure of the upper cover layer of the conveyer belt, adopts high-quality sizing materials with high wear resistance to the easily damaged parts positioned in the middle of the upper cover layer, ensures the durable service life of the middle part, adopts general sizing materials to the parts with lower wear degree on the edge of the upper cover layer, reduces the manufacturing cost as much as possible on the premise of ensuring the durable service life of the edge, thereby prolonging the operation service life of the conveyer belt by more than 3 times compared with the original one and having lower manufacturing cost;

(2) According to the invention, the edge rubber material can be divided into a plurality of sections of edge rubber material sections for the wider conveyer belt, and the wear resistance of the covering rubber adopted by the sections of edge rubber material sections is sequentially reduced from the middle part of the upper covering layer to the edge part, so that the manufacturing cost of the conveyer belt is reduced on the premise of ensuring the longer service life of the conveyer belt;

(3) According to the invention, an upper covering layer is prepared by a special multi-roller calendaring device, the device divides a roller gap serving as a rubber material inlet into a plurality of rubber material adding ports by a plurality of baffle plates according to the bandwidth distribution of the upper covering layer, the types of the rubber materials added by each rubber material adding port can be different, so that a plurality of rubber materials are mixed and adhered to each other in the roller gap behind the baffle plates, the aim of seamless transition is fulfilled, and a rubber sheet with a non-homogeneous section is formed;

(4) According to the invention, the widths of a plurality of roll gaps are sequentially reduced, the roll gap at the front end coarsely presses the rubber material and supplies the material for the next roll gap, so that the rubber material is subjected to repeated fine pressing, and the quality and stability of the prepared rubber sheet are ensured;

(5) According to the invention, the baffle can translate along the axial direction of the press roller, so that the width of different rubber material sections and the types of the rubber materials can be adjusted, and the higher preparation requirements are met;

(6) The baffle plate is made of stainless steel, the thickness of the baffle plate is regulated to be 5-10mm, deformation of the baffle plate caused by excessive thickness of the baffle plate is avoided, the purpose of blocking sizing materials cannot be achieved, and the influence on the mixing and melting effects of two adjacent sizing materials due to the increase of the distance of a transition area caused by excessive thickness of the baffle plate is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a non-homogeneous section conveyor belt according to a first embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating the operation of a multi-roll calender according to a first embodiment of the present invention;

FIG. 3 is a schematic view of the structure of FIG. 2 in the direction A;

FIG. 4 is a schematic view of the structure in the direction B in FIG. 2;

FIG. 5 is a side view of FIG. 3;

FIG. 6 is a schematic view of a non-homogeneous cross-section conveyor belt according to a second embodiment of the invention;

FIG. 7 is a schematic view of a non-homogeneous cross-section conveyor belt according to a second embodiment of the invention;

wherein: 1. an upper cover layer; 2. a framework layer; 3. a lower cover layer; 4. edge glue; 5. a middle sizing section; 6. a side sizing section; 7. a first press roller; 8. a second press roller; 9. a third press roller; 10. a first roll gap; 11. a second roll gap; 12. an end baffle; 13. a middle baffle; 14. using an optimal section of glue; 15. using a glue better section; 16. a glue section is generally used; 17. a superfine sizing material working surface; 18. a working surface of the H-level sizing material; 19. d-level sizing material working surface; 20. l-level sizing material working surface.

Detailed Description

In order that the invention may be more readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

The existing adhesive tape standard and the applied technology are both of a flat structure (shown in figure 1), the cover layers are of homogeneous structures, the performances of all parts are consistent, the adhesive tape is not manufactured according to the actual needs of all parts, the parts which are easy to wear and tear are insufficient in adhesive material performance, the parts which are difficult to wear and tear are superfluous in adhesive material performance, the service life of the adhesive tape is insufficient, the cost is high, and the damaged parts of the adhesive tape are not the whole adhesive tape, so that a great amount of high-quality resources are wasted.

At present, the covering glue for the conveyer belt is generally classified into three grades, namely: grade H (strength is more than or equal to 24MPa, elongation is more than or equal to 450%, abrasion is less than or equal to 120 mm) ³ ) Grade D (strength is more than or equal to 18MPa, elongation is more than or equal to 400%, abrasion is less than or equal to 100 mm) ³ ) And grade L (strength not less than 15MPa, elongation not less than 350%, abrasion not more than 200 mm) ³ ) Specific information can be referred to related standards such as GB/T7984-2013 or GB/T9770-2013 or HG/T3646-2014. Wherein the H-grade sizing material is suitable for sharp abrasion materials with strong damage to the adhesive tape; the D-grade sizing material is suitable for materials with high abrasion to the adhesive tape; the L-grade sizing material is suitable for materials with moderate abrasion to the adhesive tape.

Among the above-mentioned sizing materials, the H-grade sizing material has the best comprehensive performance, the best durability, the D-grade and the L-grade are general sizing materials. In addition, special-grade sizing materials with strength more than or equal to 27MPa, elongation more than or equal to 500 percent and abrasion less than or equal to 40mm3 exist nowadays, the composition components and the mass percentages of the special-grade sizing materials are shown in the table 1, the comprehensive performance, the durability and the special price are further improved, and the special-grade sizing materials are the development direction of the conveyor belt covering layer in the future.

Material for material	Dosage (weight ratio)
		Malaysia-No. one tobacco flake	70
Cis-butadiene BR9000	30
		800 mesh sulfur powder	1.45
Accelerator NOBS	0.9
		99.5% Zinc oxide	7
Industrial first-grade stearic acid	1.75
		Anti-aging agent 4010NA	2
Anti-aging agent RD	1.75
		Anti-aging agent 4020	0.6
Protective wax	1
		N234 carbon black	20
DN-1 carbon black	20
		N220 carbon black	15
Totalizing	171.45

TABLE 1

Referring to fig. 1, in view of this, a first embodiment of the present invention provides a non-homogeneous section conveyor belt including an upper cover layer 1, a carcass layer 2, and a lower cover layer 3, the upper cover layer 1 being disposed at an upper end of the carcass layer 2, the lower cover layer 3 being disposed at a lower end of the carcass layer 2. The end part of the framework layer 2 is also provided with edge glue 4, the layer structures are formed and pressed together on a production line to form a strip blank, and then the strip blank is subjected to plate vulcanization to form a finished product. The upper covering layer 1 is divided into three sections along the width direction, namely a middle sizing material section 5 and side sizing material sections 6 positioned at two sides of the middle sizing material section 5, wherein the grade of covering glue adopted by the middle sizing material section 5 is higher than that of the side sizing material section 6, namely the middle sizing material section 5 can adopt D-grade sizing material, and the side sizing material section 6 adopts L-grade sizing material; or the middle sizing material section 5 adopts H-level sizing material, and the side sizing material section 6 adopts D-level sizing material; or the middle sizing section 5 adopts special sizing, and the side sizing section 6 adopts H-grade sizing, which is specific to the working condition.

The high-quality rubber material with high wear resistance is adopted for the easily damaged part positioned in the middle of the upper cover layer 1, the durable service life of the middle is ensured, the common rubber material is adopted for the part with lower wear degree of the edge of the upper cover layer 1, and the manufacturing cost is reduced as much as possible on the premise of ensuring the durable service life of the edge. Therefore, the invention prolongs the service life of the conveyer belt by more than 3 times compared with the original conveyer belt, and has lower manufacturing cost.

The width of the middle glue segment 5 is 45-55% of the width of the upper cover layer 1.

Referring to fig. 2 to 5, the present embodiment also provides a multi-roll calender apparatus for producing an upper cladding layer 1, which includes a first roll 7, a second roll 8 and a third roll 9 rotatable along axes, the axes of the three rolls being parallel to each other. Wherein a first roll gap 10 is formed between the first press roll 7 and the second press roll 8, a second roll gap 11 is formed between the second press roll 8 and the third press roll 9, and the width of the second roll gap 11 is smaller than that of the first roll gap 10. Two end baffles 12 and two middle baffles 13 are arranged at the front end of the first roll gap 10, the two end baffles 12 are positioned at the left side and the right side of the first roll gap 10, and the two middle baffles 13 are positioned between the two end baffles 12. One end of each of the end baffle 12 and the middle baffle 13 extends into the first roll gap 10, and the shape of the end of the baffle extending into the first roll gap 10 is matched with the shape of the roll gap.

It should be noted that, the end baffles 12 and the middle baffles 13 can both translate along the axial direction of the first press roller 7 and the second press roller 8, so that the distance between the adjacent baffles is adjusted, the distance between the two middle baffles 13 is equal to the width of the middle rubber segment 5, and the distance between the middle baffles 13 and the end baffles 12 adjacent to the middle baffles is equal to the width of the side rubber segment 6.

Two baffle ends are arranged at the rear end of the second roll gap 11, two end baffles 12 are positioned at the left side and the right side of the second roll gap 11, and one ends of the two end baffles 12 also extend into the second roll gap 11.

It should be noted that, the end baffle 12 and the middle baffle 13 are located at the connecting line of the two roller centers of the roller gap, so that the front half section of the roller gap forms a separation area, the rear half section forms a transition area, the transition area is avoided being too large, and one sizing material is easy to permeate into the other sizing material, thus the purpose of the invention is not achieved; and the problem that the mixing and melting effects among different sizing materials are affected due to the shortage or insufficient material consumption of the transition zone caused by the too small transition zone is avoided.

In addition, the end shield 12 is made of nylon and has a thickness of 25-30mm. The middle baffle 13 is made of stainless steel materials, the thickness of the middle baffle is 5-10mm, deformation of the baffle caused by excessive thinness of the baffle is avoided, the purpose of blocking sizing materials cannot be achieved, the distance between transition areas is prevented from being increased due to excessive thickness of the baffle, and the mixing and melting effects of two adjacent sizing materials are prevented from being affected.

The embodiment also provides a using method of the multi-roller calendaring device, which comprises the following steps:

s1: adjusting the positions of the end baffles 12 and the middle baffle 13 according to the widths of the middle rubber section 5 and the edge rubber section 6 of the produced conveyor belt;

s2: putting the sizing materials adopted by the middle sizing material section 5 and the side sizing material section 6 between corresponding baffles, and rotating a compression roller;

s3: the rubber material is pressed through a first roll gap 10 to form a rubber rough sheet, and then sequentially passes through a second roll gap 11 at the rear to finish the rubber rough sheet, so that the rubber film is obtained after pressing;

s4: the rubber film is processed and cut to obtain the upper cover layer 1.

It should be noted that, when feeding, a certain residual glue amount needs to be ensured at the second roll gap 11 so as to compact and stabilize the size of the glue, the residual glue amount is preferably 3 to 5 cm in diameter, too large glue is easy to cause the glue to move, and too small glue is easy to cause incomplete calendaring and material shortage.

Referring to fig. 6, a second embodiment of the non-uniform section conveyor belt according to the present invention is different from the first embodiment in that: in this embodiment, the upper cover layer 1 is divided into five sections along the width direction thereof, and is suitable for the production of a medium-width adhesive tape (the width is 800-1400 mm), and the sections are respectively an optimal section 14 for adhesive, optimal sections 15 for adhesive, and general adhesive sections 16 for adhesive, wherein the optimal sections are positioned in the middle, the optimal sections 15 for adhesive are positioned on two sides of the optimal section 14 for adhesive, and the general adhesive sections 16 are positioned on the outer sides of the optimal sections 15 for adhesive. Wherein the glue grade adopted by the glue optimal section 14, the glue optimal section 15 and the glue general section 16 is increased in sequence.

Specifically, the non-homogeneous section conveyer belt comprises an upper cover layer 1, a framework layer 2 and a lower cover layer 3, wherein the upper cover layer 1 is arranged at the upper end of the framework layer 2, and the lower cover layer 3 is arranged at the lower end of the framework layer 2. The upper covering layer 1 is divided into five sections along the width direction, namely an optimal section 14 for glue located in the middle, optimal sections 15 for glue located on two sides of the optimal section 14 for glue, and general glue sections 16 located on two sides of the optimal sections 15 for glue. The glue grade adopted by the glue optimal section 14, the glue optimal section 15 and the general glue section 16 is respectively H grade, D grade and L grade or special grade glue, H grade and D grade. Depending on the working situation.

The present embodiment also provides a multi-roll calender for producing an upper cover layer 1, which comprises a first press roll 7, a second press roll 8 and a third press roll 9 rotatable along axes, the axes of the three press rolls being parallel to each other. Wherein a first roll gap 10 is formed between the first press roll 7 and the second press roll 8, a second roll gap 11 is formed between the second press roll 8 and the third press roll 9, and the width of the second roll gap 11 is smaller than that of the first roll gap 10. Two end baffles 12 and four middle baffles 13 are arranged at the front end of the first roll gap 10, the two end baffles 12 are positioned at the left side and the right side of the first roll gap 10, and the four middle baffles 13 are sequentially arranged between the two end baffles 12 along the axial direction of the press roll. One end of each of the end baffle 12 and the middle baffle 13 extends into the first roll gap 10, and the shape of the end of the baffle extending into the first roll gap 10 is matched with the shape of the roll gap.

It should be noted that, the end baffles 12 and the middle baffles 13 can translate along the axial direction of the first press roller 7 and the second press roller 8, so that the distance between the adjacent baffles is adjusted, the distance between the two middle baffles 13 positioned at the middle is equal to the width of the optimal section 14 for glue, the distance between the two middle baffles 13 positioned at the two sides and the middle baffle 13 positioned at the middle adjacent thereto is equal to the width of the optimal section 15 for glue, and the distance between the two middle baffles 13 positioned at the two sides and the end baffles 12 adjacent thereto is equal to the width of the segment 16 for general glue.

Two baffle ends are arranged at the rear end of the second roll gap 11, two end baffles 12 are positioned at the left side and the right side of the second roll gap 11, and one ends of the two end baffles 12 also extend into the second roll gap 11.

It should be noted that, the end baffle 12 and the middle baffle 13 are located at the connecting line of the two roller centers of the roller gap, so that the front half section of the roller gap forms a separation area, the rear half section forms a transition area, the transition area is avoided being too large, and one sizing material is easy to permeate into the other sizing material, thus the purpose of the invention is not achieved; and the problem that the mixing and melting effects among different sizing materials are affected due to the shortage or insufficient material consumption of the transition zone caused by the too small transition zone is avoided.

In addition, the end baffle 12 is made of nylon, the thickness of the end baffle is 25-30mm, the middle baffle 13 is made of stainless steel, the thickness of the end baffle is 5-10mm, deformation of the baffle caused by excessive thinness of the baffle is avoided, the purpose of blocking sizing materials is not achieved, the distance between a transition area caused by excessive thickness of the baffle is avoided, and the mixing and melting effects of two adjacent sizing materials are affected.

The embodiment also provides a using method of the multi-roller calendaring device, which comprises the following steps:

s1: adjusting the positions of the end baffles 12 and the middle baffle 13 according to the widths of the middle rubber section 5 and the edge rubber section 6 of the produced conveyor belt;

s2: putting the sizing materials adopted by the middle sizing material section 5 and the side sizing material section 6 between corresponding baffles, and rotating a compression roller;

s3: the rubber material is pressed through a first roll gap 10 to form a rubber rough sheet, and then sequentially passes through a second roll gap 11 at the rear to finish the rubber rough sheet, so that the rubber film is obtained after pressing;

s4: the rubber film is processed and cut to obtain the upper cover layer 1.

It should be noted that, when feeding, a certain residual glue amount needs to be ensured at the second roll gap 11 so as to compact and stabilize the size of the glue, the residual glue amount is preferably 3 to 5 cm in diameter, too large glue is easy to cause the glue to move, and too small glue is easy to cause incomplete calendaring and material shortage.

Referring to fig. 7, a third embodiment of the non-homogeneous section conveyor belt according to the present invention is different from the second embodiment in that: in this embodiment, the upper cover layer 1 is divided into seven sections along the width direction thereof, and is suitable for the production of wider adhesive tapes (the width is more than or equal to 1600 mm), and the seven sections are a special grade adhesive material working surface 17 positioned in the middle, H grade adhesive material working surfaces 18 positioned on two sides of the special grade working surface, a D grade working surface positioned on the outer side of the H grade adhesive material working surface 18 and an L grade working surface positioned on the outer side of the D grade working surface.

The present embodiment also provides a multi-roll calender for producing an upper cover layer 1, which comprises a first press roll 7, a second press roll 8 and a third press roll 9 rotatable along axes, the axes of the three press rolls being parallel to each other. Wherein a first roll gap 10 is formed between the first press roll 7 and the second press roll 8, a second roll gap 11 is formed between the second press roll 8 and the third press roll 9, and the width of the second roll gap 11 is smaller than that of the first roll gap 10. Two end baffles 12 and four middle baffles 13 are arranged at the front end of the first roll gap 10, the two end baffles 12 are positioned at the left side and the right side of the first roll gap 10, and the six middle baffles 13 are sequentially arranged between the two end baffles 12 along the axial direction of the press roll. One end of each of the end baffle 12 and the middle baffle 13 extends into the first roll gap 10, and the shape of the end of the baffle extending into the first roll gap 10 is matched with the shape of the roll gap.

It should be noted that, the end baffle 12 and the middle baffle 13 can translate along the axial direction of the first press roller 7 and the second press roller 8, so as to adjust the interval between the adjacent baffles, and make the interval between the two adjacent baffles equal to the width of the corresponding working surface.

Two baffle ends are arranged at the rear end of the second roll gap 11, two end baffles 12 are positioned at the left side and the right side of the second roll gap 11, and one ends of the two end baffles 12 also extend into the second roll gap 11.

It should be noted that, the end baffle 12 and the middle baffle 13 are located at the connecting line of the two roller centers of the roller gap, so that the front half section of the roller gap forms a separation area, the rear half section forms a transition area, the transition area is avoided being too large, and one sizing material is easy to permeate into the other sizing material, thus the purpose of the invention is not achieved; and the problem that the mixing and melting effects among different sizing materials are affected due to the shortage or insufficient material consumption of the transition zone caused by the too small transition zone is avoided.

In addition, the end baffle 12 is made of nylon, the thickness of the end baffle is 25-30mm, the middle baffle 13 is made of stainless steel materials, the thickness of the end baffle is 5-10mm, deformation of the baffle caused by excessive thinness of the baffle is avoided, the purpose of blocking sizing materials is not achieved, the distance between a transition area caused by excessive thickness of the baffle is avoided, and the mixing and melting effects of two adjacent sizing materials are affected.

The embodiment also provides a using method of the multi-roller calendaring device, which comprises the following steps:

s1: adjusting the positions of the end baffles 12 and the middle baffle 13 according to the widths of the middle rubber section 5 and the edge rubber section 6 of the produced conveyor belt;

s2: putting the sizing materials adopted by the middle sizing material section 5 and the side sizing material section 6 between corresponding baffles, and rotating a compression roller;

s3: the rubber material is pressed through a first roll gap 10 to form a rubber rough sheet, and then sequentially passes through a second roll gap 11 at the rear to finish the rubber rough sheet, so that the rubber film is obtained after pressing;

s4: the rubber film is processed and cut to obtain the upper cover layer 1.

It should be noted that, when feeding, a certain residual glue amount needs to be ensured at the second roll gap 11 so as to compact and stabilize the size of the glue, the residual glue amount is preferably 3 to 5 cm in diameter, too large glue is easy to cause the glue to move, and too small glue is easy to cause incomplete calendaring and material shortage.

In addition to the above embodiments, the present invention may have other embodiments; all technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.

Claims (3)

1. A multi-roll calendaring apparatus for producing an upper cover layer in a non-homogeneous section conveyor belt, characterized in that: the automatic rolling machine comprises at least three press rolls capable of rotating around the axes of the press rolls, wherein the axes of the press rolls are parallel to each other, the press rolls are sequentially arranged, so that roll gaps are formed between every two adjacent press rolls, the widths of the roll gaps are sequentially decreased, the front end of the roll gap which is the widest is provided with a baffle, the baffle comprises end baffles positioned at the two ends of the roll gap and at least two middle baffles positioned between the end baffles, and one ends of the end baffles and one end of the middle baffle extend into the roll gaps;

the rear end of the narrowest roll gap is provided with an end baffle plate, and the end baffle plate is positioned at two ends of the corresponding roll gap;

the middle baffle plate and the end baffle plates can translate along the axial direction of the corresponding press roller.

2. A multiple roll calendaring apparatus according to claim 1, further characterized in that: the end baffle is made of nylon with the thickness of 25-30mm, and the middle baffle is made of stainless steel with the thickness of 5-10 mm.

3. A method of using a multi-roll calendaring apparatus according to claim 1 or 2, characterized in that: the method comprises the following steps:

s1: adjusting the positions of the end baffles and the middle baffle according to the widths of the middle rubber section and the edge rubber section of the produced conveyor belt;

s2: putting the sizing materials adopted by the sizing material sections at the middle part and the sizing material sections at the side parts between corresponding baffles, and rotating the press roller;

s3: the rubber material is pressed through the widest roll gap to form a rubber rough sheet, then the rubber rough sheet is sequentially pressed through the rear roll gap, and finally the narrowest roll gap is pressed to obtain the rubber sheet;

s4: and processing and cutting the rubber film to obtain the upper covering layer.