A double-layer film unwinding device and unwinding method

Abstract

The application discloses a double-layer film unwinding device, which comprises a film grabbing hand arranged on the upper part of a cooling air box and comprising a grabbing part and a pressing roller, the grabbing part being used for extending into the cooling air box and grabbing the film on a film hanging rod; a transfer unit, the film being pressed to the transfer unit by the pressing roller, the transfer unit being independently driven by a first driving part to convey the film during operation and to press the film together with the pressing roller when stopping; and a receiving belt arranged at intervals downstream of the transfer unit, the receiving belt being in a normally open state and being used for bearing and conveying the film. The transfer unit is additionally arranged in the conveying process of the film to convey the double-layer film together with the receiving belt during the conveying process of the film, to realize the unwinding of the double-layer film together with the pressing roller, so that the receiving belt can convey the single-layer film smoothly, and the production efficiency is improved. The application further provides an unwinding method for unwinding the double-layer film by using the above-mentioned unwinding device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber product production equipment, in particular to a double-layer rubber sheet unfolding device and an unfolding method. BACKGROUND

[0002] In the manufacturing process of rubber products such as tires, rubber blocks need to be processed into rubber sheets, and then the rubber sheets are cooled, stacked, and aged at the rubber sheet cooling line before being transferred to the next process flow. In the rubber sheet cooling line, the rubber sheets are usually hung on multiple hanging rods in the cooling air box for cooling. After cooling is completed, the rubber sheets need to be grabbed out of the cooling air box. Currently, a commonly used structure for grabbing rubber sheets is a mechanical rubber grabbing device as shown in Figure 1 The grabbing structure 100 generally falls to reach the position of the rubber hanging rod and grab the rubber sheet 300, moves to the position of the belt 200 after rising into place, and then presses the rubber sheet 300 with the pressure roller on the grabbing structure 100 to enable the belt 200 to smoothly transport the rubber sheet 300 away. However, the grabbing structure 100 cannot accurately position the end of the rubber sheet 300 when grabbing, resulting in that the rubber sheet 300 grabbed by the grabbing structure 100 is in a double-layer stacked state on the belt 200, which cannot be unfolded into a single-layer structure on the belt 200, and thus affects the subsequent automatic stacking and other processes. Manual unfolding of the rubber sheet by production personnel is time-consuming and laborious, affecting production efficiency.

[0003] Therefore, how to enable the rubber sheet to be smoothly transported in a single-layer structure on the receiving belt is a problem that needs to be solved by those skilled in the art. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a double-layer rubber sheet unfolding device to enable the rubber sheet to be smoothly transported in a single-layer structure on the receiving belt.

[0005] Another purpose of the present application is to provide an unfolding method for unfolding double-layer rubber sheets using the above-mentioned unfolding device.

[0006] To achieve the above-mentioned purposes, the present application provides the following technical solutions:

[0007] A double-layer rubber sheet unfolding device, comprising:

[0008] A rubber grabbing hand is arranged at the upper part of the cooling air box, and the rubber grabbing hand comprises a grabbing part and a pressure roller. The grabbing part is used to extend into the cooling air box and grab the rubber sheet on the rubber hanging rod.

[0009] A transfer unit, the pressure roller presses the rubber sheet onto the transfer unit, and the transfer unit is independently driven by a first driving part to transport the rubber sheet when running and press the rubber sheet with the pressure roller when stopping.

[0010] A pickup belt is arranged downstream of the transfer unit, and the pickup belt is in a normally open state and used to carry and transport the film.

[0011] Preferably, in the double-layer film unwinding device, the transfer unit and the pickup belt are arranged at the same height.

[0012] Preferably, in the double-layer film unwinding device, the first driving part is a clutch motor.

[0013] Preferably, in the double-layer film unwinding device, the transfer unit is a transfer roller.

[0014] Preferably, in the double-layer film unwinding device, the transfer unit is a transfer belt.

[0015] A double-layer film unwinding method using the unwinding device of any one of the above embodiments, the unwinding method comprising at least the following steps:

[0016] Grabbing the film: after the film reaches the grabbing position in the cooling air box, the grabbing part is driven to extend into the cooling air box to grab the film, and then the grabbing part is driven to rise to a position;

[0017] Transferring the film: the grabbing part drives the film to be sent forward to the pickup belt, and the transfer unit also carries the film, the grabbing hand rotates to press the film to the transfer unit through the pressing roller, and the transfer unit and the pickup belt are simultaneously in an activated state and run for a first preset time;

[0018] Unwinding the film: the first driving part stops the transfer unit, the pressing roller and the transfer unit press the single-layer film, and the pickup belt continues to run and unwind the film head and the double-layer film;

[0019] Transporting the film: the first driving part is restarted to drive the transfer unit to run, and the grabbing hand drives the pressing roller to return to the initial position.

[0020] Preferably, in the unwinding method, in the step of grabbing the film, the horizontal height of the grabbing part when rising to the position is higher than the horizontal height of the transfer unit.

[0021] Preferably, in the unwinding method, in the step of transferring the film, after the transfer unit and the pickup belt run simultaneously for the first preset time, at least the double-layer film length between adjacent two hanging rods is transported.

[0022] Preferably, in the unwinding method, in the step of transferring the film, the double-layer film is synchronously transported on the pickup belt.

[0023] Preferably, in the above unwinding method, in the step of unwinding the film, the take-up belt at least conveys half the length of the film between two adjacent film hanging rods.

[0024] It can be seen from the above technical solution that the double-layer film unwinding device provided by the application comprises a film grabbing hand, a transfer unit and a take-up belt, wherein the film grabbing hand is arranged at the upper part of the cooling air box, the film grabbing hand comprises a grabbing part for grabbing the film and a compression roller for compressing the film, the grabbing part can move in and out of the cooling air box under the driving of the film grabbing hand to perform the film grabbing action in the cooling air box, and the compression roller is rotationally arranged to limit and convey the film; the transfer unit is used for carrying the film and is independently driven by a first driving part, the film is compressed onto the transfer unit by the movement of the compression roller after the film is grabbed, and when the transfer unit moves, it can cooperate with the compression roller to perform the film conveying action, but when the transfer unit stops running, it can cooperate with the compression roller to compress the film and make the film at the compression position move at a reduced speed or be stationary through friction; the take-up belt is arranged at the downstream position of the transfer unit in intervals and is used for taking the film released by the grabbing part, and the take-up belt is in a normally open state to smoothly carry and convey the film. In the above structure, since the transfer unit is independently driven, it can be independently started and stopped, and after the film is released by the grabbing part, if there are double-layer films, the transfer unit can be started to cooperate with the take-up belt to convey the double-layer films away from the transfer unit, and then the transfer unit is stopped to make the transfer unit cooperate with the compression roller to compress the film in the single-layer state, so that the rear film and the front film have different speeds, and the double-layer film at the front part moves downstream on the take-up belt due to the conveying action of the take-up belt and is unwound on the take-up belt as a single-layer film, thereby realizing the smooth conveying of the film on the take-up belt in a single-layer structure. The double-layer film unwinding device provided by the application is additionally provided with the transfer unit independently driven by the first driving part, which can cooperate with the take-up belt in the started state to smoothly convey the film, and can cooperate with the compression roller in the film grabbing hand in the stopped state to compress the film, so that the film at the compression position moves at a reduced speed or is stationary, and the film at the downstream position, i.e. on the take-up belt, keeps running at the original speed, so that the film is unwound from double layers to single layers by the speed difference. The process is ingenious and the structure is simple, the change to the original structure is small, and the device is suitable for various unwinding devices and has low installation space requirement, which improves the production efficiency and reduces the modification cost. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to make the technical solution of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the accompanying drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 A schematic diagram of the film grabbing structure in the prior art is shown in the figure.

[0027] Figure 2 A schematic diagram of the film grabbing structure in the prior art is shown in the figure.

[0028] Figure 3 A schematic diagram of the film grabbing structure in the prior art is shown in the figure.

[0029] Figure 4 A schematic diagram of the film grabbing structure in the prior art is shown in the figure.

[0030] Figure 5 A schematic diagram of the film grabbing structure in the prior art is shown in the figure.

[0031] In the figure, 10 is a film grabbing hand, 110 is a grabbing part, 120 is a pressing roller, 20 is a transfer unit, 30 is a receiving belt, 40 is a cooling air box, 410 is a film hanging rod, and 50 is a film.

[0032] 100 is a film grabbing structure, 200 is a belt, and 300 is a film. DETAILED DESCRIPTION

[0033] The core of the present application is to disclose a double-layer film unwinding device, so that the film is smoothly conveyed on the receiving belt in a single-layer structure.

[0034] Another core of the present application is to provide an unwinding method for unwinding double-layer films using the above-mentioned unwinding device.

[0035] In order to make the technical solution of the present application better understood by those skilled in the art, the embodiments of the present application will be described below with reference to the accompanying drawings, and in addition, the embodiments shown below do not have any limiting effect on the invention content recorded in the claims. In addition, the entire content of the structure represented by the following embodiments is not limited to the solution of the invention recorded in the claims.

[0036] As Figure 2 and Figure 3As shown, the double-layer film unwinding device provided by the embodiment of the application comprises a film grabbing hand 10, a transfer unit 20 and a receiving belt 30, wherein the film grabbing hand 10 is arranged at the upper part of a cooling air box 40, the film grabbing hand 10 comprises a grabbing part 110 for grabbing the film 50 and a compression roller 120 for compressing the film 50, the grabbing part 110 can move in and out of the cooling air box 40 under the driving of the film grabbing hand 10 to perform the grabbing action of the film 50 in the cooling air box 40, and the compression roller 120 is rotationally arranged to limit and convey the film 50; the transfer unit 20 is used for bearing the film 50 and is independently driven by a first driving part, the movement position of the compression roller 120 after grabbing the film 50 is moving towards the transfer unit 20 and compressing the film 50 to the transfer unit 20, and when the transfer unit 20 moves, it can cooperate with the compression roller 120 to perform the conveying action of the film 50, but when the transfer unit 20 stops running, it can cooperate with the compression roller 120 to compress the film 50 and make the film 50 at the compression position move at a reduced speed or be stationary through friction; the receiving belt 30 is arranged at the downstream position of the transfer unit 20 in intervals and is used for receiving the film 50 released by the grabbing part 110, and the receiving belt 30 is in an open state to smoothly bear and convey the film 50.

[0037] In the above structure, since the transfer unit 20 is independently driven, it can be independently started and stopped, and if there is a double-layer film after the film 50 is released by the grabbing part 110, the transfer unit 20 can be started to cooperate with the receiving belt 30 to convey the double-layer film away from the transfer unit 20, and then the transfer unit 20 is stopped to make the transfer unit 20 cooperate with the compression roller 120 to compress the film 50 in a single-layer state, so that the rear film 50 and the front film 50 generate a speed difference, and the double-layer film at the front part moves downstream on the receiving belt 30 due to the conveying action of the receiving belt 30 and is unwound as a single-layer film 50 on the receiving belt 30, thereby realizing the smooth conveying of the film 50 in a single-layer structure on the receiving belt 30.

[0038] The double-layer film unwinding device provided by the embodiment of the application is additionally provided with the transfer unit 20 independently driven by the first driving part, which can cooperate with the receiving belt 30 in the starting state to smoothly convey the film 50, and can cooperate with the compression roller 120 in the film grabbing hand 10 in the stopping state to compress the film 50, so that the film 50 at the compression position moves at a reduced speed or is in a stationary state, and the film 50 at the downstream position, i.e. on the receiving belt 30, keeps running at the original speed, so that the film 50 is unwound from a double layer to a single layer by the speed difference, the process is ingenious and the structure is simple, the change to the original structure is small, and the device is suitable for various unwinding devices, has low installation space requirement, improves the production efficiency and reduces the modification cost.

[0039] Further, in order to reduce the height difference of the film 50 during the conveying process between the transfer unit 20 and the receiving belt 30, so as to avoid the film 50 from being stacked again due to the height difference, in an embodiment of the present application, the transfer unit 20 and the receiving belt 30 are arranged at the same height, so that the film 50 is conveyed at the same height.

[0040] Further, in an embodiment of the present application, the first driving part is a brake motor, which can accurately control the start and stop of the transfer unit 20 to achieve the purpose of conveying the belt and clamping the belt.

[0041] Further, as shown in Figure 4 , in an embodiment of the present application, the transfer unit 20 is a transfer roller, which rotates under the driving of the first driving part, or is locked and stopped.

[0042] Further, as shown in Figure 5 , in another embodiment of the present application, the transfer unit 20 is a transfer belt, and the film 50 is pressed to any position on the surface of the transfer belt by the pressing roller 120, and the transfer belt is switched between the state of conveying the film 50 and the state of stopping conveying under the driving of the first driving part.

[0043] The embodiment of the present application also provides a double-layer film unwinding method, which uses the unwinding device provided by any of the above embodiments to unwind the double-layer film, and the unwinding method at least includes the following steps:

[0044] S01: grabbing the film: after the film 50 reaches the film grabbing position in the cooling air box 40, the grabbing part 110 is driven to extend into the cooling air box 40 to grab the film 50, and then the grabbing part 110 is driven to rise to a position;

[0045] It should be noted that the position of the grabbing part 110 rising to the position is the initial position or any position higher than the transfer unit 20 and the receiving belt 30.

[0046] S02: transferring the film: the grabbing part 110 drives the film 50 to be sent to the receiving belt 30, and the transfer unit 20 also carries the film 50, the film grabbing hand 10 rotates to press the film 50 to the transfer unit 20 by the pressing roller 120, and the transfer unit 20 and the receiving belt 30 are in the starting state and run for a first preset time;

[0047] It should be noted that the purpose of the transfer unit 20 and the receiving belt 30 being in the starting state and running for the first preset time is to move all the possible double-layer films from the transfer unit 20 to the receiving belt 30, so that the double-layer films can be unwound on the receiving belt 30.

[0048] S03: Unfolding the film: the first driving part stops the transfer unit 20, the compression roller 120 is pressed against the single-layer film 50 on the transfer unit 20, and the take-up belt 30 continues to run and unfold the film head and double-layer film of the film 50;

[0049] S04: Transporting the film: the first driving part restarts to drive the transfer unit 20 to run, and the film grabbing hand 10 drives the compression roller 120 to return to the initial position.

[0050] It should be noted that the initial position of the film grabbing hand 10 driving the compression roller 120 to return here is the position for preparing the next film grabbing action of the film 50.

[0051] Further, in another specific embodiment of the present application, in step S01, the horizontal height of the film grabbing part 110 when it is raised to the position is higher than the horizontal height of the transfer unit 20, so that the film 50 in the film grabbing part 110 can be smoothly released onto the transfer unit 20.

[0052] Further, in another specific embodiment of the present application, in step S02, the first preset time length is set by the designer according to the hanging film length of the corresponding film 50 in the cooling air box 40, which needs to make the transfer unit 20 and the take-up belt 30 run simultaneously for the first preset time length, and at least transport the double-layer film length between adjacent two hanging rods 410. It should be noted that the first preset time length is the longest time length that the transfer unit 20 needs to be turned on. When the film grabbing part 110 grabs the film 50, if there is a film 50 stacking situation, the longest size of the stacked film 50 is the film 50 fully overlapped between adjacent two hanging rods 410. Therefore, the above-mentioned first preset time length can ensure that the longest size of the stacked film 50 can also be smoothly transported to the take-up belt 30, so that the first preset time length in the actual working condition only needs to be determined by the production personnel according to the hanging film length and the transport speed of the transfer unit 20 and the take-up belt 30.

[0053] Further, on the basis of the above-mentioned embodiment, in step S02, the double-layer film is synchronously transported on the take-up belt 30, that is, the rotation rates of the transfer unit 20 and the take-up belt 30 are the same, so that the movement process of the film 50 is smoother.

[0054] Further, in another specific embodiment of the present application, in step S03, the take-up belt 30 needs to run alone for a period of time to transport a certain length of the film 50 to realize the unfolding of the double-layer film. Specifically, the take-up belt 30 transports at least half the length of the film 50 between adjacent two hanging rods 410, which can realize the complete unfolding of the film 50 and proceed to the subsequent steps.

[0055] The terms "first", "second", "left", "right", and the like as used throughout the specification and claims, and in the above figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Moreover, the terms "include", "have", and the like, as used herein, are intended to be interpreted as "including but not limited to". For example, a process, method, system, product, or apparatus that comprises a list of steps or units are not necessarily limited to those listed steps or units but can include additional steps or units not expressly listed.

[0056] The above description of disclosed embodiments is intended to be illustrative and not restrictive. Many modifications of the embodiments described herein will obvious to those with skill and other embodiments that incorporate the general principles described herein can be used without departing from the spirit and scope of the present application. Thus, the present application is not to be limited to the embodiments described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for developing a double-layer film, characterized in that, A double-layer film unfolding device is used to unfold double-layer film, the double-layer film unfolding device comprising: A glue gripper (10) is provided on the upper part of the cooling air box (40). The glue gripper (10) includes a gripping part (110) and a pressure roller (120). The gripping part (110) is used to extend into the cooling air box (40) and grip the rubber sheet (50) on the glue hanging rod (410). The transfer unit (20) is provided with a pressure roller (120) pressing the film (50) onto the transfer unit (20). The transfer unit (20) is independently driven by a first drive unit to transport the film (50) during operation and to cooperate with the pressure roller (120) to press the film (50) when stopped. A receiving belt (30) is positioned downstream of the transfer unit (20) at intervals. The receiving belt (30) is normally open and is used to carry and transport the film (50). The unfolding method includes at least the following steps: Grabbing the film: After the film (50) reaches the gripping position in the cooling air box (40), the gripping part (110) is driven to extend into the cooling air box (40) to grab the film (50), and then the gripping part (110) is driven to rise into position. Transfer of film: The gripping part (110) drives the film (50) forward to the receiving belt (30), and the transfer unit (20) also carries the film (50). The gripper (10) rotates to press the film (50) to the transfer unit (20) through the pressure roller (120). The transfer unit (20) and the receiving belt (30) are simultaneously in the start state and run for a first preset time. Unfolding the film: The first drive unit stops the transfer unit (20), the pressure roller (120) and the transfer unit (20) press the single layer of the film (50) together, and the receiving belt (30) continues to run and unfolds the glue head and double layer of the film (50); Conveying film: The first drive unit restarts to drive the transfer unit (20) to run, and the glue gripper (10) drives the pressure roller (120) back to the initial position.

2. The unfolding method as described in claim 1, characterized in that, The transfer unit (20) and the receiving belt (30) are set at the same horizontal height.

3. The unfolding method as described in claim 1, characterized in that, The first drive unit is a brake motor.

4. The unfolding method as described in claim 1, characterized in that, The transfer unit (20) is a transfer roller.

5. The unfolding method as described in claim 1, characterized in that, The transfer unit (20) is a transfer belt.

6. The unfolding method as described in claim 1, characterized in that, During the film gripping step, the horizontal height of the gripping part (110) when it rises to the position is higher than the horizontal height of the transfer unit (20).

7. The unfolding method as described in claim 1, characterized in that, In the film transfer step, after the transfer unit (20) and the receiving belt (30) run simultaneously for a first preset time, at least the length of the double-layer film between two adjacent glue-hanging rods (410) is transported.

8. The unfolding method as described in claim 7, characterized in that, In the film transfer step, the double-layer film is synchronously conveyed on the receiving belt (30).

9. The unfolding method as described in claim 1, characterized in that, In the film unfolding step, the pick-up belt (30) transports at least half the length of the film (50) between two adjacent adhesive rods (410).

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