CN220261162U - Tread cutting device - Google Patents

Abstract

The utility model relates to the field of tire manufacturing, in particular to a tread cutting device, which comprises: the supporting plate for supporting the tread, the cutter arranged above the supporting plate, the motor connected to the cutter through the transmission mechanism, the motor driving the cutter to move along the supporting plate, the tread cutting is realized, the sensor is arranged on one side of the cutter, the sensor and the cutter synchronously move, the detection end of the sensor faces downwards to detect the distance from the target position, the sensor is electrically connected with the motor controller of the motor, and the motor controller adjusts the motor rotation speed according to the detection signal of the sensor and/or the internal program of the motor controller. In the cutting process, the speed of the cutter is correspondingly adjusted according to the cutting position, so that the cutting efficiency is generally improved.

Description

Tread cutting device

Technical Field

The utility model relates to the field of tire manufacturing, in particular to a tread cutting device.

Background

The tread is an essential component of the tire. The tread is a flat long strip-shaped structure in the production and processing process, and in order to facilitate the processing and shaping of subsequent tires, the tread needs to be cut into individual small treads by a cutting device.

Chinese patent (CN 216099185U) discloses a cutting device comprising: a transfer member, at least part of which is movably arranged for transferring the tread; a supporting plate which is positioned above the conveying component and fixedly arranged so that a part of the tread conveyed by the conveying component is transferred onto the supporting plate; the supporting plate is provided with a strip-shaped cutting groove, and an included angle between the extending direction of the cutting groove and the moving direction of the transmission part is an acute angle or an obtuse angle; and the cutting device comprises a cutting knife which is movably arranged along the cutting groove so as to cut the tread on the supporting plate.

The automatic cutting of tread has been realized to above-mentioned cutting equipment, has improved the cutting efficiency of tread, but in whole cutting process, the travel speed of cut-off knife is invariable, has restricted the further improvement of cutting efficiency.

Disclosure of Invention

In order to solve the above problems, an object of the present utility model is to provide a tread cutting device, in which the speed of a cutter is adjusted according to the cutting position during the cutting process, so as to improve the cutting efficiency as a whole.

For the purpose of the utility model, the following technical scheme is adopted for implementation:

a tread cutting device, comprising: the supporting plate for supporting the tread, the cutter arranged above the supporting plate, the motor connected to the cutter through the transmission mechanism, the motor driving the cutter to move along the supporting plate, the tread cutting is realized, the sensor is arranged on one side of the cutter, the sensor and the cutter synchronously move, the detection end of the sensor faces downwards to detect the distance from the target position, the sensor is electrically connected with the motor controller of the motor, and the motor controller adjusts the motor rotation speed according to the detection signal of the sensor and/or the internal program of the motor controller. Therefore, in the cutting process, the rotating speed of the motor can be controlled by the motor controller, so that the moving speed of the cutter can be correspondingly adjusted, and when the cutter is close to the tire shoulder position of the tire tread, the sensor detects thicker tire tread, the detection signal changes, the rotating speed of the motor is further reduced, the cutter is ensured to cut the tire shoulder position at a lower moving speed, the cutting quality is ensured, and after the cutter passes through the tire shoulder position, the motor is accelerated to a high rotating speed until cutting is completed, so that the cutting efficiency is improved.

Preferably, the sensor is disposed above the cutting portion of the cutter and on the front side in the cutting direction of the cutter. Therefore, when the tire is cut, the sensor senses the position of the tire tread firstly, so that the cutter can be decelerated when the tire shoulder is cut, the cutting quality is ensured, and the problems of poor shape of the tire tread notch, curled edge of the tire tread, displacement caused by tire tread collision and the like due to too high moving speed of the cutter are avoided.

Preferably, the cutting assembly further comprises a fixing frame fixedly arranged, a cutter rest movably arranged on the fixing frame, the cutter is fixedly arranged on the cutter rest, the motor is connected with the cutter rest through the transmission mechanism, so that the cutter is driven to move, and the sensor is fixedly connected with the cutter rest. Therefore, synchronous movement of the sensor and the cutter is realized, and the sensor can accurately detect the tread on the moving path of the cutter.

Preferably, the tread cutting device further comprises a conveying member, the conveying member is located below the cutter, and the conveying member is at least partially movable to move the tread. Therefore, automatic conveying of the tread can be achieved, and cutting efficiency of the tread is improved.

Preferably, the conveying member is a conveyor belt.

A tread cutting device, comprising: support the backup pad of tread, set up the cutting assembly of backup pad top, cutting assembly includes: the tire tread cutting device comprises a fixed frame, a movable cutter frame arranged on the fixed frame, a cutter fixedly arranged on the cutter frame, a motor for driving the cutter frame to move, and a motor controller for controlling the motor to move, wherein the motor is used for driving the cutter to move along a supporting plate to cut the tire tread, a sensor is arranged on the fixed frame, the position of the sensor corresponds to the position of a tire shoulder of the tire tread passing through the cutting direction for the first time, the sensor is used for detecting whether the cutter frame passes through the position of the sensor, the sensor is electrically connected with the motor controller, and the motor controller is used for adjusting the rotating speed of the motor according to the detection signal of the sensor and/or an internal program of the motor controller. Therefore, in the cutting process, the rotating speed of the motor can be controlled by the motor controller, so that the moving speed of the cutter can be correspondingly adjusted, and as the position of the sensor corresponds to the position of the tire shoulder which is cut for the first time in cutting, when the sensor detects the cutter rest, the cutter is indicated to be close to the position of the tire shoulder, the sensor detects the change of signals, the rotating speed of the motor is further reduced, the cutter is ensured to cut the position of the tire shoulder at a lower moving speed, the cutting quality is ensured, and after the cutter passes through the position of the tire shoulder, the motor is accelerated to a high rotating speed until the cutting is completed, and the cutting efficiency is improved.

Preferably, the fixing frame spans over the tread, and the sensor is movably arranged on the fixing frame. Therefore, when the treads with different widths are cut, the positions of the sensors can be correspondingly adjusted, so that the sensors are always positioned at the tire shoulder positions of the treads passing through for the first time in the cutting direction.

Preferably, the tread cutting device further comprises a conveying member, the conveying member is located below the cutter, and the conveying member is at least partially movable to move the tread.

Preferably, the conveying member is a conveyor belt.

Compared with the prior art, the embodiment of the utility model has the beneficial effects that: the sensor is added, the relative position between the cutter and the tread is detected through the sensor, a corresponding detection signal is sent to the motor controller, the rotating speed of the motor is adjusted, the moving speed of the cutter in the cutting process is finally changed, and the cutting efficiency is improved.

Drawings

Fig. 1 is a perspective view of a tread cutting device.

Fig. 2 is a front view of the tread cutting device.

Fig. 3 is a left side view of the tread cutting device.

Fig. 4 is a schematic diagram of motor speed during cutting.

Detailed Description

Embodiments of the present utility model provide a tread cutting device for cutting an entire tread into individual small treads of predetermined length for use in a subsequent tire building process. According to the cutting device, the moving speed of the cutting knife is correspondingly adjusted according to the relative position between the cutting knife and the tread, so that the cutting quality is ensured, the time required for cutting is reduced, and the cutting efficiency is improved.

The specific structure of the tread cutting device will be further described with reference to the accompanying drawings.

Fig. 1 shows a perspective view of a tread cutting device, see fig. 1, which includes a frame 10, a conveying member 20 provided on the frame 10 for conveying a tread, a cutting assembly 30 provided above the conveying member 20 and movable relative to a conveying direction of the conveying member 20 for cutting the tread, a support plate 40 provided on an outlet side of the conveying member 20 and positioned below the cutting assembly 30 for supporting the tread at the time of cutting, and a pressing plate 50 provided on an outlet side of the support plate 40 for pressing the tread downward at the time of cutting to avoid movement of the tread.

The conveying component 20 may be a conveying belt, and the width of the conveying belt needs to be greater than or equal to the width of the tread, because the tread can be spread on the conveying component 20 in a fully-unfolded manner, the conveying of the tread is convenient, more importantly, the subsequent cutting quality can be ensured, and the problems of poor shape of the incision and the like caused by incomplete unfolding of the tread are avoided.

Fig. 2 shows a front view of the tread cutting device, referring to fig. 2, the cutting assembly 30 includes a fixing frame 31 fixedly provided on the frame 10 and located above the transfer member 20, a cutter holder 32 movably provided (fig. 2 is embodied to move in and out of the paper surface direction) on the fixing frame 31, a cutter 33 fixedly provided on the cutter holder 32, a motor (not shown) connected to the cutter holder 32 through a transmission mechanism (not shown) to control the movement of the cutter holder 32 on the fixing frame 31, and a motor controller (not shown) to control the movement of the motor, the connection relationship and the positional relationship between the motor, the transmission mechanism and the cutter holder can refer to the structure in the chinese patent (CN 216099185U), and the transmission mechanism can adopt any mechanism in the prior art to convert the rotational movement into the linear translational movement, such as a screw mechanism, a rack-and-pinion mechanism. The motor controller is a well-known component in the motor field, and any motor controller in the prior art can be adopted, and the motor can be controlled to work according to the set direction, speed, angle and response time.

More specifically, as shown in fig. 2, the cutting portion 331 located at the left end of the cutter 33 is disposed above the supporting plate 40, and when the cutter 33 cuts the tread along the upper side of the supporting plate 40, that is, the position of the supporting plate 40 is the position of the tread cutting position. In the horizontal direction, the cutter 33 is disposed obliquely, specifically, the height of the cutter 33 is lowered as it approaches the support plate 40, thereby ensuring the cutting quality. Further, as shown in fig. 3, the cutter 33 is also disposed obliquely in the vertical direction, specifically, the cutting portion 331 of the cutter 33 is high near the front side in the cutting direction (right side in fig. 3), whereas it is low, also in order to secure the cutting quality.

Although the moving direction of the cutter holder 32 and the conveying direction of the conveying member 20 are perpendicular to each other in this embodiment, that is, the tread is rectangular after cutting, in other embodiments, the tread may be rectangular after cutting, that is, the tread may be rectangular after cutting, for example, in a bevel manner as in chinese patent application (CN 216099185U).

As shown in fig. 1, the supporting plate 40 is in an elongated plate structure, and the length of the supporting plate 40 needs to be greater than or equal to the width of the tread, so that the tread can be tiled on the supporting plate 40, and the tread is fully unfolded, so that the cutting of the cutter 33 is facilitated. Further, in order to ensure that the lower surface of the tread is completely cut off, the upper surface of the support plate 40 is provided with a cutting groove recessed downward, the extending direction of the cutting groove is identical to the direction in which the tread is to be cut, in this embodiment, both the left and right ends of the cutting groove extend to the end portions of the support plate 40, so that openings for the cutting blade 33 to enter and exit are formed at both end portions of the support plate 40, so that the cutting blade can cut the lower surface of the tread in the process of moving from one side of the tread to the other side. The rest of the upper surface of the support plate 40 except the position where the cutting groove is located is used for supporting the tread during cutting, which is also called a support surface, and the shape of the support surface can adopt the shape that the inclined surface and the plane of Chinese patent (CN 216099185U) are connected with each other so as to facilitate the conveying of the tread.

As shown in fig. 1, the compacting plate 50 has a flat plate structure, and the lower surface is flat, so that the compacting plate 50 can be stably compacted on the tread when moving downwards to the compacting position, ensuring that the tread is stably fixed and preventing the tread from moving. And the length of the pressing plate 50 is preferably close to the width of the tread, so that the whole width direction of the tread can be pressed, and the situation that the whole position of the tread in the width direction is not deviated during cutting is ensured. The pressing plate 50 is provided with a driving part 51 for driving the pressing plate 50 to move up and down, and the pressing plate 50 is provided with a loosening position at the upper part separated from the tread and a pressing position at the lower part for pressing the tread, in this embodiment, the driving part 51 is a cylinder arranged longitudinally, and the pressing plate 50 is fixedly arranged on the output end of the cylinder, so that the upward and downward movement is realized.

When the tread cutting device is used, the tread (not shown) is paved on the conveying part 20 and driven by the conveying part 20 to move to the positions of the supporting plate 40 and the pressing plate 50 until the conveying part 20 conveys the tread by a preset length (the length is determined according to the specification of the tire), and at the moment, the conveying part 20 stops moving; then the compacting plates 50 are switched from the releasing position to the compacting position under the action of the driving component, namely the compacting plates 50 move downwards and compact the tread, so that the tread is ensured not to displace; then the motor controller drives the motor to rotate according to a preset program, the motor drives the knife rest 32 to move on the fixed frame 31 through the transmission mechanism, and then the knife rest 32 drives the cutter 33 to correspondingly move, so that the cutter 33 moves from one side of the tread to the other side to cut the tread; then the cut small tread is driven by external equipment to move forwards continuously; finally, the motor controller drives the motor to rotate reversely to drive the cutter 33 to reset, so that a cutting action is realized.

Note that in order to cut the tread in the width direction, the cutter 33 should be located outside the tread width direction at the initial stage of cutting, so that when the cutter 33 just contacts the side edge of the tread (i.e. when cutting the shoulder), the entering edge has no other supporting point except the edge contact with the shoulder, so that in order to ensure that the cutter 33 can smoothly cut into the shoulder position, the cutting speed is not easy to be too fast, in practice, the moving speed of the cutter 33 is usually 0-20 mm/s, once the moving speed of the cutter is too fast, the problems of poor shape of the cut, curling of the tread, shifting caused by bumping the tread and the like are caused, while in the prior art, the cutter 33 is consistent in speed in the whole cutting process, the cutter 33 cuts at a low speed, and the cutting efficiency is lower.

In order to solve the above problems, the inventors have noted that as the cutting proceeds, when the cutter 33 enters the middle region of the tread (i.e., leaves the shoulder position), both sides of the cutter 33 are supported by the rubber material, and the progress can be made smoothly, and even if the moving speed of the cutter 33 is increased, the problems of poor shape of the cut, chipping, and the like are not generated, and the collision to the tread is not generated, so that the displacement to the tread is not generated, and further, the moving speed of the cutter can be increased when the tread middle region is cut. For the shoulder on the other side, the cutter 33 can also be supported by the rubber, so that a higher displacement speed can also be used. In addition, when the cutter 33 moves on both sides other than the tread width direction, the cutter 33 can also move at a high speed because the cutting operation is not required.

From the above analysis, it can be found that in order to improve the cutting efficiency, the cutting speed of the rest positions except for the first shoulder position should be improved as much as possible, that is, the curve of the motor rotation speed should be as shown in fig. 4, specifically, in this embodiment, the motor rotation speed is exemplified by a higher 2300rpm and a lower 500rpm, when the cutter 33 is located at the left side of the tread, the motor rotation speed drives the cutter to move to the left side of the tread at 2300rpm, when the cutter 33 approaches the left shoulder, the motor rotation speed is reduced to 500rpm, the cutting quality is ensured, and after the cutter 33 leaves the left shoulder, the motor rotation speed is increased to 2300rpm until the tread is cut. After cutting is completed, the cutter may be reversed at 2300rpm to return to the starting position.

It should be noted that the value of the motor rotation speed is merely an example, and may be adjusted according to the actual situation. In addition, the rotational speed before the motor deceleration may also be different from the rotational speed recovered after the motor deceleration, for example, the rotational speed recovered after the motor deceleration may exceed 2300rpm, for example 3000rpm; it may also be below 2300rpm, for example 2000rpm. Likewise, the rotational speed before deceleration may be higher or lower than the rotational speed recovered after completion of deceleration.

As described above, the adjustment of the rotation speed can be achieved by the motor controller, but it is noted that the tread of different specifications has different widths and the widths of the shoulders are different, so in order to achieve the purpose of decelerating the above-mentioned cutter 33 near the shoulder position, as shown in fig. 1, in this embodiment, a sensor 60 is disposed above the cutter 33, and the sensor 60 moves synchronously with the cutter 33, the detection end of the sensor 60 is located at the front side of the cutter 33 in the cutting direction and faces downward, the sensor 60 is used for detecting the distance of the target position (the position of the object facing the detection end of the sensor 60), so as to obtain a detection signal, and the sensor 60 is connected with the motor controller by an electrical signal, so that the motor controller can receive the detection signal and adjust the rotation speed of the motor accordingly. The sensor 60 may specifically be a laser sensor that detects a change in distance.

Specifically, when the cutter 33 is at the start position, both the sensor 60 and the cutter 33 are located outside the tread width direction, and thus the detection end of the sensor 60 can only detect the frame 10 or the support plate 40, and the distance between the detection end of the sensor 60 and the target position is relatively long. When cutting, along with the movement of the cutter 33, the sensor 60 gradually approaches the tire shoulder and can be moved to the upper part of the tire shoulder, at this time, the tire shoulder position is the target position, and then the distance between the detection end of the sensor 60 and the target position is relatively reduced, so that the detection signal changes, and the motor controller changes the motor rotation speed, specifically: when the sensor 60 detects a decrease in distance, the motor controller decreases the rotational speed of the motor, for example, to 500rpm at 2300rpm. The time required for the cutter to pass the shoulder can then be calculated based on the length of the shoulder, and when the time for the motor speed to drop reaches that time, the motor speed is restored to 2300rpm, or it can be determined based on the motor start-up period when the motor speed is restored to 2300rpm, for example, 8s after the motor is started up, the motor speed is restored to 2300rpm. When the cut tread is conveyed away, the cutter motor is returned to the origin at 2300rpm.

The following beneficial effects can be obtained after the sensor 60 is provided: when the cutter 33 approaches the shoulder position for the first time, the detection signal of the sensor 60 is changed, so that the motor controller reduces the rotation speed of the motor, the motor rotation speed is low, the cutter 33 is ensured to cut the shoulder position stably, the cutting quality is ensured, when the cutter 33 leaves the shoulder, the motor rotation speed is increased, the time required for cutting is reduced, the cutting efficiency can be improved as a whole, and the cutting quality can be ensured.

As shown in fig. 1, the sensor 60 is fixedly disposed on top of the blade holder 32 by a mounting plate 61 so that the sensor 60 can move in synchronization with the cutter 33. And the sensor 60 is disposed on the front side in the cutting direction of the cutter 33 so that the sensor 60 will move to the shoulder position prior to the cutter 33, thereby ensuring that the cutter 33 can be decelerated.

In other embodiments, the sensor 60 may not move synchronously with the cutter 33, for example, the sensor 60 may be mounted on the top of the fixing frame 31 and disposed above the position of the shoulder cut first in the cutting direction, where the detection end of the sensor 60 is not directed downward any more, but is directed toward the cutter holder 32 for detecting whether the cutter holder 32 moves to the position of the shoulder, and when the cutter holder 32 moves to the position of the shoulder, a detection signal is sent to the motor controller to slow down the motor, so that the purpose of reducing the rotation speed of the motor can be achieved. In this embodiment, the sensor 60 is preferably movable so that the position at which the sensor 60 is mounted on the mount 31 can be changed according to different specifications of tires.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art. The generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A tread cutting device, comprising: the supporting plate for supporting the tread, the cutter arranged above the supporting plate, the motor connected to the cutter through the transmission mechanism, the motor driving the cutter to move along the supporting plate, the tread cutting is realized, the sensor is arranged on one side of the cutter, the sensor and the cutter synchronously move, the detection end of the sensor faces downwards to detect the distance from the target position, the sensor is electrically connected with the motor controller of the motor, and the motor controller adjusts the motor rotation speed according to the detection signal of the sensor and/or the internal program of the motor controller.

2. The tread cutting device of claim 1, wherein the sensor is disposed above the cutting portion of the cutter and on the front side in the cutting direction of the cutter.

3. The tread cutting device of claim 1, wherein the cutting assembly further comprises a fixed mount fixedly disposed, a knife rest movably disposed on the fixed mount, the knife is fixedly mounted on the knife rest, the motor is coupled to the knife rest via the transmission mechanism to move the knife, and the sensor is fixedly coupled to the knife rest.

4. The tread cutting device of claim 1, further comprising a conveying member located below the cutter and at least partially movable to move the tread.

5. Tread cutting device according to claim 4, wherein the conveying means is a conveyor belt.

6. A tread cutting device, comprising: support the backup pad of tread, set up the cutting assembly of backup pad top, cutting assembly includes: the tire tread cutting device comprises a fixed frame, a movable cutter frame arranged on the fixed frame, a cutter fixedly arranged on the cutter frame, a motor for driving the cutter frame to move, and a motor controller for controlling the motor to move, wherein the motor is used for driving the cutter to move along a supporting plate to cut the tire tread, a sensor is arranged on the fixed frame, the position of the sensor corresponds to the position of a tire shoulder of the tire tread passing through the cutting direction for the first time, the sensor is used for detecting whether the cutter frame passes through the position of the sensor, the sensor is electrically connected with the motor controller, and the motor controller is used for adjusting the rotating speed of the motor according to the detection signal of the sensor and/or an internal program of the motor controller.

7. The tread cutting device of claim 6, wherein the mount straddles over the tread, and the sensor is movably mounted to the mount.

8. The tread cutting device of claim 6, further comprising a transfer member positioned below the cutter and at least partially movable to move the tread.

9. Tread cutting device according to claim 8, wherein the conveying means is a conveyor belt.