A continuous production method for rewinding and changing collagen sausage casings

Abstract

This invention discloses a continuous production method for rewinding and changing collagen sausage casings, belonging to the field of sausage casing production technology. A first and second wheel group are arranged vertically at intervals. Clamping mechanisms are located at the feeding positions of the first and second wheel groups, and a winding mechanism is located at the feeding position of the clamping mechanisms. During normal production, the sausage casings pass between the first and second wheel groups in a straight line. The clamping mechanisms are released, and the casings are continuously wound up by the winding mechanism. When changing rolls, the clamping mechanisms clamp and cut the casings. The first and / or second wheel groups move to change the distance between them, creating a wavy feeding path for the casings to store a predetermined length. The storage speed generated by the wheel group movement is equal to the casing feeding speed. After changing rolls, the clamping mechanisms are released, the wheel groups move in the opposite direction to return to the normal spacing, and the casings resume a straight feeding pattern. This invention enables continuous roll changing without stopping the machine, eliminates human contact contamination, and improves production efficiency and product quality.

Description

Technical Field

[0001] This invention relates to the field of sausage casing production technology, and more specifically to a continuous production method for rewinding and changing collagen sausage casings. Background Technology

[0002] Collagen casings are tubular films made from animal skin collagen, widely used as outer casings for sausages, hams, and other meat products. Currently, the industry commonly uses single-station winding equipment for casing winding. The production line continuously produces casings, which are then guided and wound onto the winding equipment. When the winding equipment is full and needs to be replaced, the machine must be stopped to complete the changeover, resulting in discontinuous production and reduced overall casing production efficiency. Furthermore, during the stoppage and changeover process, the production line continues to produce casings; if not handled promptly, the produced casings will accumulate or even fall off, causing material waste.

[0003] Furthermore, to ensure that sausage casings do not pile up or wrinkle during machine downtime for rewinding, two operators are typically required to work closely together. One operator continuously holds and tightens the casing by hand to maintain tension, while the other quickly disassembles and replaces the rewinding roller. This manual pulling method not only consumes a lot of manpower, but also exposes operators' hands to direct contact with the casings. Sweat and skin flakes from their hands can easily adhere to the casing surface, posing a food safety and hygiene hazard. At the same time, the tension provided by manual pulling relies entirely on the operator's experience and cannot be quantitatively and consistently controlled. Excessive tension can easily stretch the wet collagen casings thin or even break them, while insufficient tension will cause the casings to sag and wrinkle, seriously affecting the rewinding quality. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a continuous production method for collagen casing winding and changing, solving the technical problems of existing single-station winding equipment requiring machine stoppage and waiting during roll changing, the risk of product contamination during the roll changing process, and unstable casing tension control.

[0005] The technical solution of the present invention is as follows: In a first aspect of the present invention, a continuous production method for rewinding and changing collagen casings is provided, comprising a first wheel group and a second wheel group arranged at a predetermined distance along a vertical direction, a clamping mechanism provided at the unloading position of the first wheel group and the second wheel group, and a winding mechanism provided at the unloading position of the clamping mechanism. During normal production, the casings pass through the gap between the first and second roller groups in a straight line, the clamping mechanism is in the loose state, and the casings are continuously wound up by the winding mechanism. When the winding mechanism needs to change rolls, the clamping mechanism clamps the casing and cuts it at the end of the casing near the winding mechanism. The first wheel group and / or the second wheel group move vertically to change the distance between them, so that the casing forms a wavy material path between the first wheel group and the second wheel group to store the casing of a predetermined length. The casing storage speed generated by the movement of the first wheel group and / or the second wheel group is equal to the casing feeding speed. After the winding mechanism completes the roll change, the clamping mechanism releases the casing and supplies the casing to the winding mechanism. The first and / or second roller groups move in the opposite direction to restore the spacing during normal production, and the casing resumes its straight-line feeding mode.

[0006] In some embodiments of the present invention, a frame is also included, wherein the first wheel set is fixedly disposed on the upper part of the frame, and the second wheel set is movably disposed on the lower part of the frame. When changing rolls, the second wheel set moves upward to reduce the distance between it and the first wheel set.

[0007] In some embodiments of the present invention, a frame is also included, wherein the first wheel set is movably disposed on the upper part of the frame, and the second wheel set is fixedly disposed on the lower part of the frame. When changing rolls, the first wheel set moves downward to reduce the distance between it and the second wheel set.

[0008] In some embodiments of the present invention, a frame is also included, wherein the first wheel set and the second wheel set are both movably mounted on the frame, and the two move toward each other to reduce the gap during roll changing.

[0009] In some embodiments of the present invention, the first wheel set includes a plurality of parallel first guide wheels, and the second wheel set includes a plurality of parallel second guide wheels, wherein the plurality of first guide wheels and the plurality of second guide wheels are arranged vertically in an alternating manner. The first guide wheel and the second guide wheel are provided with annular grooves in the circumferential direction. The casing is wrapped in the annular groove. The surfaces of the first guide wheel and the second guide wheel are coated with an anti-stick coating. The edges of the first guide wheel and the second guide wheel are provided with arc transitions. The clamping mechanism includes a set of opposing jaws, and the clamping surfaces of the jaws are provided with a flexible anti-slip layer.

[0010] In some embodiments of the present invention, a control system is also included. The first wheel group and / or the second wheel group are provided with a drive mechanism. When the winding mechanism needs to change rolls, the control system acquires the casing feeding speed and converts the casing feeding speed into a target movement speed of the first wheel group and / or the second wheel group according to the number of folds in the wavy material path formed by the casing between the first wheel group and the second wheel group. The control system controls the first wheel group and / or the second wheel group to move at the target movement speed, so that the casing storage speed generated by the movement of the first wheel group and / or the second wheel group is equal to the casing feeding speed.

[0011] In some embodiments of the present invention, when the winding mechanism needs to change rolls, the first wheel group and / or the second wheel group, starting from the end near the loading or unloading position, move closer to each other in sequence along the casing direction, so that the casing gradually forms a wavy material path and expands along the casing direction from a straight material path. After the winding mechanism completes the roll change, the first wheel group and / or the second wheel group, starting from the end closest to the loading or unloading position, move away from each other sequentially along the casing direction, so that the casing gradually changes from a wavy material path to a straight material path along the casing direction and expands.

[0012] In some embodiments of the present invention, a tension detection unit is provided between the unloading position of the first wheel group and / or the second wheel group and the clamping mechanism. The tension detection unit monitors the tension value of the casing in real time and transmits it to the control system. The control system compares the tension value with a preset tension range. When the tension value exceeds the preset tension range, the control system adjusts the target movement speed of the first wheel group and / or the second wheel group to compensate for the tension change.

[0013] In some embodiments of the present invention, after the winding mechanism has changed rolls, the control system obtains the current winding speed of the winding mechanism, calculates the target release speed based on the current winding speed and the number of folds in the casing, and controls the first wheel group and / or the second wheel group to move in the opposite direction at the target release speed to release the stored casings. During the release process, the tension detection unit detects the casing tension in real time and adjusts the reverse movement speed of the wheel assembly based on the comparison between the detected tension value and the preset tension range, so that the casing tension is maintained within the preset tension range.

[0014] In some embodiments of the present invention, an early warning module is also included, wherein the first wheel set and / or the second wheel set are provided with displacement sensors, and the early warning module is communicatively connected to the displacement sensors; When the winding mechanism needs to change rolls, the displacement sensor detects the motion displacement data of the first wheel group and / or the second wheel group and transmits it to the control system. The control system compares the motion displacement data with preset displacement data. When the motion displacement data reaches the preset displacement data, the control system controls the early warning module to issue an early warning signal.

[0015] One or more technical solutions of the present invention have the following beneficial effects: Through the coordinated action of the first and second roller groups, the casings are clamped by the clamping mechanism during roll changing. The change in the roller spacing forms a wave-shaped material feeding path, temporarily storing the continuously produced casings from upstream between the two sets of guide rollers. This provides sufficient time for the roll changing operation of the winding mechanism, allowing the production line to complete the replacement of the winding rollers without stopping the machine, fundamentally eliminating production interruptions and material waste caused by machine stoppage.

[0016] The mechanized clamping mechanism and wheel storage action replace the traditional manual pulling operation. The entire roll changing process does not require the operator to touch the casing with their hands, completely eliminating the risk of contamination by sweat, skin flakes and microorganisms caused by hand contact, and meeting the hygiene and safety requirements of collagen casings as food filling outer layer.

[0017] The control system adjusts the speed of the wheel assembly in real time according to the casing feeding speed to keep the material storage speed matched with the feeding speed. At the same time, during the release stage, the target release speed is calculated based on the winding speed and a tension detection unit is introduced for closed-loop correction. This effectively avoids the problems of wet casings being stretched thin or even broken due to excessive tension, or becoming loose and wrinkled due to insufficient tension.

[0018] In addition, the method's early warning module issues an early warning signal when the wheel assembly moves to a preset displacement position, preventing the storage amount from exceeding the device's capacity, which could lead to equipment damage or casing accumulation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram showing the state of the casing provided in Embodiment 1 of the present invention passing between the first and second wheel groups in a straight-line feeding manner; Figure 2 This is a schematic diagram of the state of the casing provided in Embodiment 1 of the present invention, which forms a wavy material feeding path between the first and second wheel groups.

[0020] In the diagram: 1. First roller group, 2. Second roller group, 3. Clamping mechanism, 4. Frame, 5. Winding mechanism, 6. Tension detection unit, 7. Sausage casing. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Example 1 In a typical embodiment of the present invention, such as Figure 1 As shown, a continuous production method for rewinding and changing collagen casings is provided. The equipment used includes a frame 4. A first wheel group 1 and a second wheel group 2 are arranged at preset distances along the vertical direction on the frame 4. Each of the first wheel group 1 and the second wheel group 2 includes multiple parallel guide wheels. The multiple guide wheels are arranged vertically in an alternating manner, that is, the guide wheels of the first wheel group 1 and the guide wheels of the second wheel group 2 are staggered in the horizontal projection.

[0023] A clamping mechanism 3 is provided at the unloading position of the first roller group 1 and the second roller group 2. The clamping mechanism 3 is used to clamp and fix the casing 7 when changing rolls. A winding mechanism 5 is provided at the unloading position of the clamping mechanism 3. The winding mechanism 5 is used to wind the casing 7 into a roll.

[0024] During normal production, the casing 7 passes through the gap between the first wheel group 1 and the second wheel group 2 in a straight line. At this time, the clamping mechanism 3 is in a fully released state and does not clamp the casing 7.

[0025] The casing 7 is continuously produced from the upstream production line and conveyed forward at a set feed speed. Under normal production conditions, since the distance between the first roller group 1 and the second roller group 2 remains constant, the casing 7 passes through them in a straight line without creating an additional storage path. The clamping mechanism 3 remains loose, allowing the casing 7 to pass smoothly through and reach the winding mechanism 5, where it is continuously wound up. Throughout the normal production process, the production line operates continuously, and the feed speed of the casing 7 matches the winding speed of the winding mechanism 5, ensuring smooth winding operations.

[0026] When the winding roller on the winding mechanism 5 is full and needs to be replaced, the clamping mechanism 3 first acts to clamp and fix the casing 7 located at the unloading position. After clamping, the clamping mechanism 3 cuts the casing 7 at the end of the casing 7 close to the winding mechanism 5. After cutting, the fully wound winding roller is separated from the casing 7 continuously supplied from upstream. The operator can then remove the fully wound roller and replace it with a new empty roller.

[0027] Subsequently, at least one of the first wheel group 1 and the second wheel group 2 moves vertically to change the distance between them. When the distance between the wheel groups changes, the casing 7, which originally passed in a straight line, is forced to form a wavy material path between the first wheel group 1 and the second wheel group 2.

[0028] The wavy feeding path essentially increases the actual path length of the casing 7 between the first roller group 1 and the second roller group 2. The greater the variation in the roller group spacing, the larger the amplitude of the wavy path, and the more casing 7 it can accommodate. In this way, during the roll-changing operation of the winding mechanism 5, the casings 7 continuously produced by the upstream production line can be temporarily stored between the first roller group 1 and the second roller group 2, and will not accumulate or fall off due to the downstream winding being paused.

[0029] To ensure that the casing 7 is not subjected to additional tensile force during the storage process, the storage speed of the casing 7 generated by the movement of the first set of rollers 1 and the second set of rollers 2 needs to be equal to the feeding speed of the casing 7. When the storage speed is equal to the feeding speed of the casing 7, the casing 7 can be smoothly contained in the wavy path after entering the storage area. At this time, the casing 7 will not accumulate due to the storage speed being too slow, nor will it generate additional tensile force on the casing 7 due to the storage speed being too fast. This speed matching relationship ensures that the wet collagen casing 7 is almost free from any tensile force during the storage process, thereby avoiding the problem of the casing 7 becoming thin or even breaking due to excessive tension.

[0030] After the rewinding mechanism 5 completes the roll change operation, the new rewinding roller is installed in place. At this time, the clamping mechanism 3 releases the casing 7, releasing the stored casing 7 and supplying it to the rewinding mechanism 5. One or more of the first roller group 1 and the second roller group 2 that moved during the roll change move in opposite directions, restoring the spacing to the normal production spacing. As the roller spacing is restored, the wavy material path gradually straightens, and the stored casing 7 is released and supplied to the rewinding mechanism 5 for winding. When the roller group has completely returned to the normal production spacing, the casing 7 resumes straight material feeding, and the entire production line returns to the normal continuous winding state.

[0031] As an optional configuration in this embodiment, the device used in this method further includes a frame 4, which serves as the supporting structure for the entire device, used to support and fix the various functional components. In a specific fixed and movable configuration, the first wheel set 1 is fixedly disposed on the upper part of the frame 4, and the second wheel set 2 is movably disposed on the lower part of the frame 4. The first wheel set 1 is rigidly connected to the frame 4 through bearing seats or fixed brackets, and its vertical and horizontal positions remain fixed. The second wheel set 2 is mounted on the frame 4 through a sliding mechanism or guide rail mechanism, and can slide freely in the vertical direction.

[0032] When the winding mechanism 5 needs to change rolls, the second wheel group 2 moves upward under the driving force, thereby reducing the distance between it and the first wheel group 1. During the upward movement of the second wheel group 2, the casings 7, which were originally moving in a straight line between the first wheel group 1 and the second wheel group 2, are gradually lifted up, forming a wavy material path. The greater the upward displacement of the second wheel group 2, the larger the amplitude of the wavy path, and the more casings 7 are stored. After the roll change is completed, the second wheel group 2 moves downward, returning to its lowest position during normal production. As the second wheel group 2 descends, the wavy material path gradually straightens, and the stored casings 7 are released to the winding mechanism 5.

[0033] As another optional configuration in this embodiment, the first wheel group 1 is movably disposed on the upper part of the frame 4, and the second wheel group 2 is fixedly disposed on the lower part of the frame 4. The second wheel group 2 is rigidly connected to the frame 4 through a bearing seat or a fixed bracket, and its vertical and horizontal positions remain fixed. The first wheel group 1 is mounted on the frame 4 through a sliding mechanism or a guide rail mechanism, and can slide freely in the vertical direction.

[0034] When the winding mechanism 5 needs to change rolls, the first roller group 1 moves downward under the driving force, thereby reducing the distance between it and the second roller group 2. During the downward movement of the first roller group 1, the casings 7, which were originally moving in a straight line between the first roller group 1 and the second roller group 2, are gradually pressed down as the first roller group 1 descends, forming a wavy material path. After the roll change is completed, the first roller group 1 moves upward, returning to its highest position during normal production. As the first roller group 1 rises, the wavy material path gradually straightens, and the stored casings 7 are released to the winding mechanism 5.

[0035] As another optional configuration in this embodiment, the first wheel group 1 and the second wheel group 2 are both movably mounted on the frame 4, that is, neither the first wheel group 1 nor the second wheel group 2 is fixed, and both can move in the vertical direction.

[0036] When the winding mechanism 5 needs to change rolls, the first wheel group 1 and the second wheel group 2 move towards each other in the vertical direction under the action of driving force. That is, the first wheel group 1 moves downward and the second wheel group 2 moves upward, and the two move closer to each other at the same time, thereby reducing the gap.

[0037] Compared to a scheme where only one wheelset moves, the opposing motion of the two wheelsets allows for a faster pitch change rate at the same drive speed. With the same pitch change, the speed of each wheelset can be halved, which helps to further improve the smoothness and control precision of the wheelset motion. After the reel change, wheelset 1 and wheelset 2 move in opposite directions, moving away from each other and restoring the pitch to the normal production pitch.

[0038] As a further optimization of this embodiment, the first wheel group 1 includes multiple parallel first guide wheels, and the second wheel group 2 includes multiple parallel second guide wheels. The multiple first guide wheels and multiple second guide wheels are arranged vertically in an alternating pattern. The alternating arrangement means that, in the vertical projection direction, the position of the first guide wheel is exactly above the gap between two adjacent second guide wheels.

[0039] As the casing 7 alternately passes around the first guide wheel and the second guide wheel, this staggered arrangement ensures that the casing 7 can smoothly transition from the previous guide wheel to the next guide wheel, forming a continuous wave-shaped material feeding path.

[0040] The first and second guide rollers are circumferentially grooved. These grooves are circumferentially formed on the outer circumferential surface of the guide rollers, designed to accommodate and guide the casing 7. When the casing 7 is wound within the groove, the side walls of the groove limit its movement, preventing it from slipping off the guide roller surface during transport and ensuring the stability of the transport path. The width of the groove bottom is matched to the width of the casing 7, ensuring smooth passage while preventing excessive gaps that could cause the casing 7 to wobble within the groove.

[0041] The surfaces of both the first and second guide rollers are coated with an anti-stick coating. The anti-stick coating can reduce the adhesion between the casing 7 and the surface of the guide roller, preventing the wet collagen casing 7 from adhering to the surface of the guide roller during the feeding process, thus avoiding damage to the surface of the casing 7 or obstruction of feeding caused by adhesion.

[0042] The edges of the first and second guide wheels are provided with arc transitions. The arc transition means that the edge of the guide wheel and the end face are smoothly connected by an arc surface, rather than a right angle or sharp corner. The arc transition eliminates the sharp edges of the guide wheel edges. When the casing 7 bends and feeds at the edge of the guide wheel, it will not be cut or scratched by the sharp edges, effectively protecting the surface integrity of the wet collagen casing 7.

[0043] As a further optimization of this embodiment, the clamping mechanism 3 includes a set of opposing jaws. A set of opposing jaws means that two jaws are opposite to each other, with one jaw located above the casing 7 and the other jaw located below the casing 7, or the two jaws are located on the horizontal sides of the casing 7. When the clamping mechanism 3 is activated, the two jaws move towards each other to clamp and fix the casing 7 located between them.

[0044] The gripping surfaces of the jaws are equipped with a flexible anti-slip layer, which can be made of materials with good elasticity and wear resistance, such as silicone or rubber. This flexible anti-slip layer serves two purposes: firstly, it cushions the clamping force through the elastic deformation of the flexible material, preventing the rigid jaws from directly contacting the casing 7 and causing indentations or compression damage; secondly, the high coefficient of friction of the anti-slip material enhances the reliability of the gripping, preventing the casing 7 from slipping out during clamping. The thickness and hardness of the flexible anti-slip layer are carefully selected to allow for appropriate elastic deformation during clamping, evenly distributing the clamping force while providing sufficient frictional resistance.

[0045] As a further optimization of this embodiment, the device used in this method also includes a control system. One or more movable parts of the first wheel set 1 and the second wheel set 2 are provided with a drive mechanism. The drive mechanism is used to provide driving force for the movement of the wheel set. The drive mechanism can be a combination of a servo motor and a ball screw, or it can be other drive forms such as a linear motor. Under the command of the control system, the drive mechanism precisely controls the movement speed, displacement and direction of the wheel set.

[0046] When the winding mechanism 5 needs to change rolls, the control system first obtains the feed speed of casing 7. The feed speed of casing 7 can be obtained by the speed sensor set in the upstream production line. The feed speed of casing 7 refers to the conveying speed of casing 7 from the upstream production line into the area where the first roller group 1 and the second roller group 2 are located. It is usually determined by the output speed of the upstream extrusion molding equipment.

[0047] After acquiring the feeding speed of casing 7, the control system converts the feeding speed of casing 7 into the target movement speed of the first wheel group 1 and / or the second wheel group 2 based on the number of bends in the wavy material path formed by casing 7 between the first wheel group 1 and the second wheel group 2. The number of bends in the wavy material path refers to the number of curved segments in the wavy path formed by casing 7 alternately passing around the guide wheels of the first wheel group 1 and the second wheel group 2. The specific value of the number of bends depends on the actual number of guide wheel pairs that casing 7 passes around; the more guide wheel pairs that casing 7 passes around, the larger the number of bends. The conversion logic of the number of bends is as follows: when the wheel group spacing changes by a unit distance, the length of casing 7 in each bend of the wavy path will change accordingly, and the sum of the changes in all bends is the total change in the storage capacity of casing 7.

[0048] Therefore, the total storage speed is equal to the wheel set speed multiplied by the fold number. When the control system aims to make the storage speed equal to the casing 7 feeding speed, the target speed of the wheel set should be equal to the casing 7 feeding speed divided by the fold number. The control system controls the movement of the first wheel set 1 and / or the second wheel set 2 according to this target speed, so that the casing 7 storage speed generated by the wheel set movement remains equal to the casing 7 feeding speed.

[0049] Through the above control logic, no matter how the feeding speed of casing 7 changes, the control system can adjust the movement speed of the wheel group accordingly to ensure that the storage speed is always matched with the feeding speed, thereby maintaining the tension of casing 7 basically constant during the storage process.

[0050] As another wheel group movement mode in this embodiment, when the winding mechanism 5 needs to change rolls, the first wheel group 1 and / or the second wheel group 2 start from the end closest to the loading position and move closer to each other in sequence along the casing conveying direction. That is, the pair of guide wheels closest to the loading position moves first to form a wave-shaped path, and then the next adjacent pair of guide wheels moves in sequence, so that the casing gradually forms a wave-shaped material path along the casing conveying direction from a straight material movement mode and expands forward until all guide wheel pairs have completed approaching.

[0051] After the winding mechanism 5 completes the roll change, the first wheel group 1 and / or the second wheel group 2 start from the end closest to the unloading position and move away from each other in the opposite direction of the casing conveying direction. That is, the pair of guide wheels closest to the unloading position first returns to a straight state, and then the adjacent pair of guide wheels moves in sequence, so that the casing gradually returns to a straight conveying mode along the opposite conveying direction from a wavy material path and extends backward until all guide wheel pairs return to the spacing during normal production.

[0052] As an alternative, the wheelsets can also move closer to each other in sequence, starting from the end closest to the unloading position and gradually advancing towards the upper material position in the opposite direction of the conveying to form a wave-shaped material path. When releasing, they can start from the end closest to the loading position and gradually return to a straight material path in the conveying direction.

[0053] By moving the wheelset in pairs sequentially, the load that needs to be overcome in a single drive is reduced, making the movement of the wheelset smoother and more stable.

[0054] As a further optimization of this embodiment, a tension detection unit 6 is provided between the unloading position of the first wheel group 1 and the second wheel group 2 and the clamping mechanism 3. The tension detection unit 6 is used to monitor the tension value of the casing 7 in real time and transmit the detected tension value to the control system.

[0055] The tension detection unit 6 can employ a tension sensor, which typically includes a force-measuring roller in contact with the casing 7 and a force-sensitive element connected to the force-measuring roller. During the feeding process, the casing 7 applies pressure to the force-measuring roller, and the force-sensitive element converts this pressure into an electrical signal. The control system calculates the current tension value based on this electrical signal. The control system compares the received tension value with a preset tension range. The preset tension range is an upper and lower limit value pre-set based on the material properties, wet strength, and production process requirements of the collagen casing 7.

[0056] When the tension value detected by the tension detection unit 6 exceeds the preset tension range, it indicates that there is a deviation between the actual movement speed of the wheel set and the theoretical calculation value. This deviation may originate from fluctuations in the feeding speed of the casing 7, lag in the response of the drive mechanism, or changes in the characteristics of the casing 7 itself. At this time, the control system adjusts the target movement speed of the first wheel set 1 and / or the second wheel set 2 according to the magnitude and direction of the tension deviation to compensate for the tension change.

[0057] Specifically, when the detected tension value is higher than the upper limit of the preset tension range, it indicates that the material storage speed is too fast, and the casing is overstretched. The control system then appropriately reduces the movement speed of the wheel assembly. When the detected tension value is lower than the lower limit of the preset tension range, it indicates that the material storage speed is too slow, and the casing accumulates, causing it to loosen. The control system then appropriately increases the movement speed of the wheel assembly. Through this closed-loop tension control, the control system can correct the movement speed of the wheel assembly in real time, ensuring that the tension of the casing 7 remains within the preset tension range during the material storage process, further improving the accuracy and reliability of tension control.

[0058] As a further optimization of this embodiment, after the winding mechanism 5 completes the roll change, the clamping mechanism 3 remains clamped. At this time, the casing 7 stored between the first roller group 1 and the second roller group 2 needs to be released and supplied to a new winding roller. The control system obtains the current winding speed of the winding mechanism 5. The winding speed refers to the actual winding linear speed of the winding mechanism 5 during the start-up phase. This speed can be obtained from the encoder of the drive motor of the winding mechanism 5 or from the speed sensor located at the entrance of the winding mechanism 5.

[0059] When the winding mechanism 5 has just completed a roll change and restarted, its winding speed may not have reached a stable production speed yet, but is in the process of gradually accelerating. After the control system obtains this real-time winding speed, it calculates the target release speed based on the current winding speed and the number of folds in the casing 7.

[0060] The calculation logic for the target release speed corresponds to the calculation logic for the material storage stage. During the release stage, the relationship between the reverse motion speed and the winding speed of the wheel set is as follows: the reverse motion speed of the wheel set multiplied by the number of folds equals the casing feed speed minus the winding speed, that is, the wheel set release speed equals the difference between the feed speed and the winding speed divided by the number of folds.

[0061] When the winding mechanism 5 restarts after changing rolls, the winding speed gradually increases from zero. If the winding speed is lower than the feed speed, the difference is the rate at which the wheel assembly needs to release the casings by reversing its movement. The wheel assembly releases the stored casings by reversing its movement at the corresponding speed. When the winding speed gradually increases to be equal to the feed speed, the difference drops to zero, the wheel assembly returns to its initial position and stops moving. At this point, the wavy material feeding path changes to a straight feeding path, and the casings are directly wound up by the winding mechanism 5 at the same speed as the feed speed, entering a stable production state.

[0062] During the release process, the tension detection unit 6 continues to monitor the tension value of the casing 7 in real time. The control system adjusts the reverse movement speed of the wheel assembly based on a comparison between the detected tension value and the preset tension range. If the release speed is too fast, causing the tension to fall below the lower limit of the preset range, the control system appropriately reduces the reverse movement speed of the wheel assembly; if the release speed is too slow, causing the tension to exceed the upper limit of the preset range, the control system appropriately increases the reverse movement speed of the wheel assembly.

[0063] This closed-loop tension control during the release phase ensures that the tension of the stored casing 7 remains within the preset range throughout the release process, preventing the casing 7 from breaking or becoming loose and wrinkled due to improper release speed. Once the stored casing 7 is fully released and the roller assembly returns to the normal production spacing, the casing 7 resumes its straight-line feeding mode, and the production line enters normal continuous winding mode.

[0064] As a further optimization of this embodiment, the device used in this method also includes a warning module. The movable wheel sets in the first wheel set 1 and the second wheel set 2 are equipped with displacement sensors, and the warning module is communicatively connected to the displacement sensors. The displacement sensors are used to detect the amount of vertical displacement of the movable wheel sets. The displacement sensors can be devices capable of accurately measuring linear displacement, such as linear encoders or magnetostrictive displacement sensors.

[0065] When the winding mechanism 5 needs to change rolls, the displacement sensor detects the motion displacement data of the first wheel group 1 and / or the second wheel group 2 in real time, and transmits the detected motion displacement data to the control system. The motion displacement data reflects the cumulative displacement of the wheel group from its initial position. This displacement directly corresponds to the amplitude change of the wavy material feeding path, and thus corresponds to the length of the casing 7 stored between the first wheel group 1 and the second wheel group 2.

[0066] The control system stores preset displacement data, which corresponds to the warning position of the wheelset in the vertical direction. This warning position is usually set at a distance before the limit of the wheelset's travel. The preset displacement data is set by determining a safety margin based on the maximum usable travel of the wheelset, and then subtracting the safety margin from the maximum travel to obtain the preset displacement data.

[0067] Since the preset displacement data is less than the maximum stroke, the warning signal is issued in advance before the wheel set reaches the limit position, reminding the operator to complete the roll change operation in time, and preventing the casing 7 from continuing to be supplied after the wheel set is in place, which may lead to accumulation or equipment damage.

[0068] When the roll set moves to the preset displacement position, the material storage capacity is close to the limit, but there is still a safety margin for continued material storage, allowing the operator reaction time. At this time, the control system controls the early warning module to issue an early warning signal. The early warning signal can be in the form of an audible and visual alarm, using warning lights and buzzers installed on the equipment to issue visual and audible alarms, reminding the operator to complete the roll change operation as soon as possible.

[0069] By setting up the early warning module, operators can promptly obtain information about the material storage status, rationally arrange the roll changing operation rhythm, and avoid the material storage exceeding the equipment capacity due to excessive roll changing time, thereby improving the reliability and safety of the production process.

[0070] During the roll changing process described above, operators do not need to directly touch the casing 7 with their hands. From clamping by the clamping mechanism 3, cutting the casing 7, and the wheel assembly moving to store the material, to the wheel assembly reversing to release the casing 7 and the clamping mechanism 3 releasing after the roll changing is completed, all steps are automatically completed by the equipment. The entire operation process completely eliminates the risk of contaminants such as sweat and skin flakes adhering to the surface of the casing 7 due to hand contact, ensuring the food safety and hygiene of the collagen casing 7.

[0071] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A continuous production method for rewinding and changing collagen sausage casings, characterized in that, It includes a first wheel group and a second wheel group arranged at a preset distance along the vertical direction, a clamping mechanism is provided at the unloading position of the first wheel group and the second wheel group, and a winding mechanism is provided at the unloading position of the clamping mechanism; During normal production, the casings pass through the gap between the first and second roller groups in a straight line, the clamping mechanism is in the loose state, and the casings are continuously wound up by the winding mechanism. When the winding mechanism needs to change rolls, the clamping mechanism clamps the casing and cuts it at the end of the casing near the winding mechanism. The first wheel group and / or the second wheel group move vertically to change the distance between them, so that the casing forms a wavy material path between the first wheel group and the second wheel group to store the casing of a predetermined length. The casing storage speed generated by the movement of the first wheel group and / or the second wheel group is equal to the casing feeding speed. After the winding mechanism completes the roll change, the clamping mechanism releases the casing and supplies the casing to the winding mechanism. The first and / or second roller groups move in the opposite direction to restore the spacing during normal production, and the casing resumes its straight-line feeding mode.

2. The continuous production method for rewinding and changing collagen casings as described in claim 1, characterized in that, It also includes a frame, with the first wheel set fixedly mounted on the upper part of the frame and the second wheel set movably mounted on the lower part of the frame. When changing rolls, the second wheel set moves upward to reduce the distance between it and the first wheel set.

3. A continuous production method for rewinding and changing collagen casings as described in claim 1, characterized in that, It also includes a frame, with the first wheel set movably mounted on the upper part of the frame and the second wheel set fixedly mounted on the lower part of the frame. When changing rolls, the first wheel set moves downward to reduce the distance between it and the second wheel set.

4. A continuous production method for rewinding and changing collagen casings as described in claim 1, characterized in that, It also includes a frame, on which the first wheel set and the second wheel set are movably mounted. When changing rolls, the two move toward each other to reduce the distance between them.

5. A continuous production method for rewinding and changing collagen sausage casings as described in claim 1, characterized in that, The first wheel set includes a plurality of parallel first guide wheels, and the second wheel set includes a plurality of parallel second guide wheels. The plurality of first guide wheels and the plurality of second guide wheels are arranged vertically in an alternating pattern. The first guide wheel and the second guide wheel are provided with annular grooves in the circumferential direction. The casing is wrapped in the annular groove. The surfaces of the first guide wheel and the second guide wheel are coated with an anti-stick coating. The edges of the first guide wheel and the second guide wheel are provided with arc transitions. The clamping mechanism includes a set of opposing jaws, and the clamping surfaces of the jaws are provided with a flexible anti-slip layer.

6. A continuous production method for rewinding and changing collagen casings as described in claim 1, characterized in that, It also includes a control system. The first wheel group and / or the second wheel group are equipped with a drive mechanism. When the winding mechanism needs to change rolls, the control system obtains the casing feeding speed and converts the casing feeding speed into a target movement speed of the first wheel group and / or the second wheel group according to the number of folds in the wavy material path formed by the casing between the first wheel group and the second wheel group. The control system controls the first wheel group and / or the second wheel group to move at the target movement speed, so that the casing storage speed generated by the movement of the first wheel group and / or the second wheel group is equal to the casing feeding speed.

7. A continuous production method for rewinding and changing collagen casings as described in claim 6, characterized in that, When the winding mechanism needs to change rolls, the first wheel group and / or the second wheel group, starting from the end closest to the loading or unloading position, move closer to each other in sequence along the casing direction, so that the casing gradually forms a wavy material path and expands along the casing direction from a straight material path. After the winding mechanism completes the roll change, the first wheel group and / or the second wheel group, starting from the end closest to the loading or unloading position, move away from each other sequentially along the casing direction, so that the casing gradually changes from a wavy material path to a straight material path along the casing direction and expands.

8. A continuous production method for rewinding and changing collagen casings as described in claim 6, characterized in that, A tension detection unit is provided between the unloading position of the first wheel group and / or the second wheel group and the clamping mechanism. The tension detection unit monitors the tension value of the casing in real time and transmits it to the control system. The control system compares the tension value with a preset tension range. When the tension value exceeds the preset tension range, the control system adjusts the target movement speed of the first wheel group and / or the second wheel group to compensate for the tension change.

9. A continuous production method for rewinding and changing collagen casings as described in claim 8, characterized in that, After the winding mechanism changes rolls, the control system obtains the current winding speed of the winding mechanism, calculates the target release speed based on the current winding speed and the number of folds in the casing feed, and controls the first wheel group and / or the second wheel group to move in the opposite direction at the target release speed to release the stored casings. During the release process, the tension detection unit detects the casing tension in real time and adjusts the reverse movement speed of the wheel assembly based on the comparison between the detected tension value and the preset tension range, so that the casing tension is maintained within the preset tension range.

10. A continuous production method for rewinding and changing collagen casings as described in claim 6, characterized in that, It also includes an early warning module, wherein the first wheel group and / or the second wheel group are equipped with displacement sensors, and the early warning module is communicatively connected to the displacement sensors; When the winding mechanism needs to change rolls, the displacement sensor detects the motion displacement data of the first wheel group and / or the second wheel group and transmits it to the control system. The control system compares the motion displacement data with preset displacement data. When the motion displacement data reaches the preset displacement data, the control system controls the early warning module to issue an early warning signal.

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