Slitting device for narrow edge rubber of rubber conveying belt

Abstract

The utility model discloses a slitting device for narrow strip edge rubber of a rubber conveying belt. The slitting device comprises a feeding roller, a traction roller, a first-section slitting knife device, a slitting roller, a second-section slitting knife device, a guide roller set and a double-station coiling device which are sequentially arranged in the material advancing direction. And the first-section slitting knife device and the second-section slitting knife device form a two-stage slitting structure which is used for cutting the wide-width rubber sheet into narrow-strip edge rubber in a staged manner. And the slitting roller is positioned between the first-section slitting knife device and the second-section slitting knife device to form a stress release area, so that the rubber sheet subjected to the first-section slitting is subjected to second-section slitting after being subjected to extrusion deformation recovery. According to the utility model, the stable slitting of the 15mm adhesive tape and the coiling of the 300mm diameter are realized, and meanwhile, the coking waste of materials is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of narrow strip edge rubber cutting technology, and particularly relates to a cutting device for narrow strip edge rubber of rubber conveyor belts. Background Technology

[0002] Because the film is relatively thick and elastic, but narrow, the increased blade thickness during slitting leads to severe compression deformation, making it impossible to rewind – a major technical challenge in the industry. Typically, the film to be slit is 600 mm wide. To cut 40 15 mm wide rolls of film, 39 slitting blades are needed. The blades have a certain thickness (typically 0.85 mm wide with a tapered tip), resulting in severe compression of the slit film, making it trapezoidal rather than rectangular, with a rounded surface, making it impossible to rewind. The industry primarily uses circular saw blades for cutting, but this method has the following drawbacks: 1. Because there is a protective film on one side of the film, it mixes with the scraps after cutting, making it unusable and wasting material; 2. The heat generated during cutting can easily cause the film to char into particles, affecting product quality. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a slitting device for narrow strip rubber of rubber conveyor belts, which realizes stable slitting of 15mm rubber strips and rolling into 300mm diameter rolls, while avoiding material charring and waste.

[0004] Technical solution: To achieve the above objectives, the present invention provides a slitting device for narrow strip edge rubber of a rubber conveyor belt, comprising a feeding roller, a traction roller, a first-stage slitting knife device, a slitting roller, a second-stage slitting knife device, a guide roller group, and a dual-station winding device arranged sequentially along the material travel direction; the first-stage slitting knife device and the second-stage slitting knife device constitute a two-stage slitting structure, used to cut wide rubber sheets into narrow strip edge rubber in stages.

[0005] Furthermore, the slitting roller is located between the first-stage slitting device and the second-stage slitting device, forming a stress relief zone, so that the film that has been squeezed and deformed by the first-stage slitting can recover before entering the second-stage slitting.

[0006] Furthermore, both the first-stage slitting device and the second-stage slitting device contain at least 20 slitting blades, with a blade width ≤ 0.85 mm and a blade tip cone angle ≤ 15°.

[0007] Furthermore, the first-stage slitting device is driven to lift and lower as a whole by a first cylinder, and is equipped with a first slitting airbag to provide blade preload. The second-stage slitting device is driven to lift and lower as a whole by a second cylinder, and is equipped with a second slitting airbag to provide blade preload. The preload pressure is higher than the total cylinder pressure.

[0008] Furthermore, the preload of the first and second slitting blade airbags is configured to compensate for blade diameter errors, ensuring that all blades are compacted with the slitting roller.

[0009] Furthermore, the dual-station winding device includes a winding shaft A and a winding shaft B. Both winding shaft A and winding shaft B are made of square steel, and the matching winding core is provided with square holes that mate with the winding shaft.

[0010] Furthermore, the tension of the A winding shaft and the B winding shaft are independently controlled by the magnetic powder brake, and the winding tension decreases with the tapered direction as the winding diameter increases.

[0011] Furthermore, the traction roller and the slitting roller are directly driven by the same drive motor through a synchronous belt pulley, while the A winding shaft and the B winding shaft are indirectly driven by a clutch.

[0012] Furthermore, the guide roller group includes guide roller A and guide roller B. Several narrow strips of edge adhesive, after two-stage slitting strokes, are divided into two winding paths. One winding path is guided by guide roller A and wound onto the core of winding shaft A, while the other winding path is guided by guide roller B and wound onto the core of winding shaft B.

[0013] Furthermore, the upper surface of the film fed by the feed roller is covered with a protective film to reduce surface deformation during the slitting process.

[0014] Beneficial effects: This utility model reduces the number of cuts per cut from 39 to 20 through a two-stage slitting structure design, and significantly reduces extrusion deformation, enabling 15mm ultra-narrow adhesive strips to be stably rolled up to a diameter of 300mm, breaking through the industry's 25mm width limit. It can handle adhesive strips with a film thickness of ≤4mm and a slitting width of 15–300mm, with a minimum roll width of 15mm and a maximum roll diameter of 300mm. Attached Figure Description

[0015] Figure 1 This is a side view of the structure of this utility model;

[0016] Figure 2 This is a top view of the structure of this utility model. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] There are two major drawbacks in the current narrow strip rubber slitting of rubber conveyor belts:

[0019] 1. Low roll width limit: Traditional slitting machines can only cut the narrowest rubber strips to 25mm. When the width is less than 25mm, the roll is prone to collapse, which cannot meet the production needs of ultra-narrow rubber strips of 15-20mm.

[0020] 2. Poor cutting quality: The use of circular saw blades for cutting leads to charring of the rubber material (heat accumulation), mixing and contamination of the protective film and scraps, and the 0.85mm thickness of the slitting blade causes the rubber strip to be squeezed and deformed into a trapezoidal shape (not a rectangle), affecting the flatness of the roll-up.

[0021] To solve the above problems, the technical solution of this utility model is as follows: Figure 1 and Figure 2 As shown, the slitting device for narrow-strip rubber on a rubber conveyor belt includes a feed roller 1, a traction roller 2, a first-stage slitting blade device 3, a slitting roller 5, a second-stage slitting blade device 4, a guide roller group, and a dual-station winding device arranged sequentially along the material travel direction. The first-stage slitting blade device 3 and the second-stage slitting blade device 4 constitute a two-stage slitting structure, used to cut wide rubber sheets into narrow-strip rubber in stages. Through the two-stage slitting structure design, the number of cuts per pass is reduced from 39 to 20, and extrusion deformation is significantly reduced, enabling 15mm ultra-narrow rubber strips to be stably wound to a diameter of 300mm, breaking through the industry's 25mm width limit. It can handle rubber strips with a thickness ≤4mm and a slitting width of 15–300mm, with a minimum roll width of 15mm and a maximum roll diameter of 300mm.

[0022] The slitting roller 5 is located between the first-stage slitting blade device 3 and the second-stage slitting blade device 4, forming a stress relief zone. This allows the film, after being squeezed and deformed by the first-stage slitting, to recover before entering the second-stage slitting. By overcoming physical limitations through stress relief, residual stress after the first-stage slitting can be eliminated, preventing the deformation from being superimposed during the second-stage slitting. Furthermore, the natural rebound of the rubber strip forms a "V-shaped gap," reducing the resistance of the second-stage slitting.

[0023] Within the width range, the original single-section 39-blade slitting device was changed to a two-section slitting structure, namely: a single-section slitting device 3 and a two-section slitting device 4, each with 20 slitting blades; the single-section slitting device 3 cuts the 600 mm wide film into 20 30 mm film sheets, and the compression deformation of the film by the blades is reduced by 50% compared to cutting 40 15 mm film sheets, greatly improving the degree of deformation of the film under compression. The 30mm wide film is fed forward by the slitting roller 5 to the second-stage slitting device 4. After the film leaves the first-stage slitting device 3, the extrusion pressure disappears, the film stress is released, and the film deformation is reduced. When the film enters the second-stage slitting device 4, there is a certain "V-shaped gap" (the cone tip shape of the slitting blade) between the films. During slitting, the extrusion within the width range is basically absorbed by the "V-shaped gap". Therefore, when the second-stage slitting device 4 slits the film into 40 films with a width of 15mm, the extrusion pressure within the width range is very small, the uniformity of the top and bottom of the film is good, and it is easy to roll up when rewinding.

[0024] Both the first-stage slitting device 3 and the second-stage slitting device 4 contain at least 20 slitting blades, with a blade width ≤ 0.85 mm and a blade tip cone angle ≤ 15°. The reduced cone angle lowers slitting resistance, prevents trapezoidal deformation of the rubber strip, and the ultra-thin blades reduce material waste.

[0025] The first-stage slitting device 3 is driven to lift and lower as a whole by the first cylinder 12, and is equipped with a first slitting airbag 14 to provide blade pre-tensioning force. The second-stage slitting device 4 is driven to lift and lower as a whole by the second cylinder 11, and is equipped with a second slitting airbag 13 to provide blade pre-tensioning force, with the pre-tensioning pressure being higher than the total cylinder pressure. The airbag pre-pressure compensates for blade diameter errors, ensuring the cutting rate.

[0026] The pre-tightening force of the first slitting blade airbag 14 and the second slitting blade airbag 13 is configured to compensate for the blade diameter error and ensure that all blades are pressed firmly against the slitting roller 5, so as to solve the problem of film adhesion caused by some blades not being pressed firmly.

[0027] The dual-station winding device includes a winding shaft A 8 and a winding shaft B 9. Both winding shaft A 8 and winding shaft B 9 are made of 30×30mm square steel structure, which allows for quick manual correction of the rubber strip offset and avoids winding misalignment. The matching core is provided with a 30.5×30.5mm square hole that mates with the winding shaft. The outer diameter is 90mm and the width is 25mm. The square hole prevents the core from slipping.

[0028] The tension of the A take-up shaft 8 and the B take-up shaft 9 is independently controlled by the magnetic powder brake, and the take-up tension decreases with the increase of the roll diameter by taper, that is, the inner layer tension is greater than the outer layer tension, so as to avoid excessive extrusion and deformation of the internal film, thereby preventing the narrow film strip from sinking in during winding and improving the uniformity of the roll density.

[0029] The traction roller 2 and the slitting roller 5 are directly driven by the same drive motor 10 through a synchronous belt pulley. The traction roller 2 and the slitting roller 5 are driven synchronously to avoid stretching and deformation of the film. The A winding shaft 8 and the B winding shaft 9 are indirectly driven by a clutch. The clutch controls the winding shaft to realize the independent start and stop of the A / B winding shafts, which can realize the function of changing rolls without stopping the machine.

[0030] The guide roller assembly includes guide roller A 6 and guide roller B 7. Several narrow strips of adhesive, after two slitting strokes, are divided into two winding paths. One winding path is guided by guide roller A 6 and wound onto the core of take-up shaft A 8. The other winding path is guided by guide roller B 7 and wound onto the core of take-up shaft B 9. Forty adhesive strips are diverted to take-up shafts A and B (20 strips each) to prevent the narrow strips from tangling. Guide roller B 7 is located below guide roller A 6 and also functions as a storage roller, thus buffering the speed difference between slitting and winding.

[0031] The upper surface of the rubber sheet fed by the feed roller 1 is covered with a protective film to reduce surface deformation during the slitting process. The protective film absorbs slitting stress, improves the flatness of the rubber strip surface, and avoids film contamination caused by traditional circular saw cutting.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A slitting device for the narrow edge coating of a rubber conveyor belt, characterized in that: It includes a feed roller (1), a traction roller (2), a first-stage slitting device (3), a slitting roller (5), a second-stage slitting device (4), a guide roller group, and a dual-station winding device arranged sequentially along the material travel direction; the first-stage slitting device (3) and the second-stage slitting device (4) constitute a two-stage slitting structure, which is used to cut wide-width film into narrow strips of film in stages.

2. The slitting apparatus for the edge strip of a rubber conveyor belt strip according to claim 1, characterized in that: The slitting roller (5) is located between the first-stage slitting device (3) and the second-stage slitting device (4), forming a stress relief zone, so that the film that has been squeezed and deformed by the first-stage slitting can be restored before entering the second-stage slitting.

3. The slitting apparatus for the edge strip of a rubber conveyor belt according to claim 1, characterized in that: Both the first-stage slitting device (3) and the second-stage slitting device (4) contain at least 20 slitting blades, with a blade width ≤ 0.85 mm and a blade head cone angle ≤ 15°.

4. The slitting apparatus for the edge strip of a rubber conveyor belt according to claim 1, characterized in that: The first-stage slitting device (3) is driven to lift and lower as a whole by the first cylinder (12), and is equipped with a first slitting airbag (14) to provide the blade preload. The second-stage slitting device (4) is driven to lift and lower as a whole by the second cylinder (11), and is equipped with a second slitting airbag (13) to provide the blade preload, and the preload pressure is higher than the total cylinder pressure.

5. The slitting apparatus for the edge strip of a rubber conveyor belt strip according to claim 4, characterized in that: The preload of the first slitting blade airbag (14) and the second slitting blade airbag (13) is configured to compensate for the blade diameter error and ensure that all blades are compacted with the slitting roller (5).

6. The slitting apparatus for the edge strip of a rubber conveyor belt strip according to claim 1, characterized in that: The dual-station winding device includes a winding shaft A (8) and a winding shaft B (9). Both winding shaft A (8) and winding shaft B (9) are made of square steel, and the matching core is provided with square holes that cooperate with the winding shaft.

7. The slitting apparatus for the edge strip of a rubber conveyor belt strip according to claim 6, characterized in that: The tension of the A winding shaft (8) and the B winding shaft (9) is independently controlled by the magnetic powder brake, and the winding tension decreases with the increase of the winding diameter by taper.

8. The slitting apparatus for the edge strip of a rubber conveyor belt strip according to claim 6, characterized in that: The traction roller (2) and the slitting roller (5) are directly driven by the same drive motor (10) through a synchronous belt pulley, while the A winding shaft (8) and the B winding shaft (9) are indirectly driven by a clutch.

9. The slitting apparatus for the edge strip of a rubber conveyor belt strip according to claim 6, characterized in that: The guide roller group includes A guide roller (6) and B guide roller (7). Several narrow strips of edge rubber are divided into two winding paths after two-stage slitting strokes. One winding path is guided by A guide roller (6) and wound onto the core of A winding shaft (8). The other winding path is guided by B guide roller (7) and wound onto the core of B winding shaft (9).

10. The slitting apparatus for the edge strip of a rubber conveyor belt according to claim 1, characterized in that: The upper surface of the film fed by the feed roller (1) is covered with a protective film to reduce surface deformation during the slitting process.

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