A processing technology for medical chitosan dressing

Abstract

The present invention relates to the technical field of chitosan dressing processing, and discloses a medical chitosan dressing processing technology, including: obtaining a coil for packaging medical chitosan dressing, and detecting whether the supply coil is used up; when the supply coil is used up, connecting the replacement coil and the supply coil with an adhesive; setting the length of the coil connection, denoted as the connection length; setting up an auxiliary shaft for assisting the connection of the replacement coil and the supply coil; implementing a timing duration calculation strategy to obtain a timing duration, and after a first moment, pushing the auxiliary shaft to connect the supply coil and the replacement coil at an interval of the timing duration; implementing a same tension maintaining strategy to keep the tensions of the supply coil and the replacement coil the same during the connection process; unwinding the replacement coil at the calculated linear velocity, implementing an end connection strategy to connect the coil clamped in the clamping mechanism and the replacement coil; enhancing the strength of the connected coil, avoiding the interruption of the production process, and improving the efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of chitosan dressing processing, and specifically to a processing technology for medical chitosan dressings. Background Art

[0002] Chitosan is extracted from the shells of crustaceans and has excellent biodegradability and non-toxicity, meeting the requirements of modern medicine for materials. The functions of this dressing are mainly reflected in promoting wound healing, reducing the risk of infection, and alleviating pain, etc. Chitosan can form a protective film, keep the wound moist, promote cell regeneration, and improve local immunity by releasing bioactive substances. When packaging chitosan dressings, the roll replacement technology has gradually become a key link to meet the dual requirements of production efficiency and material properties. Roll replacement mainly involves the selection and application of packaging materials, usually including the combination of polymer films, non-woven fabrics, and other functional materials.

[0003] The existing roll replacement process is that when it is detected that the remaining amount of the supply roll reaches the set threshold, the new roll and the old roll are connected using an adhesive. After the connection is completed, the old roll is cut off, and the new roll is used to replace the old roll. At this time, the roll on the old roll has not been used up, resulting in waste. At the same time, during the connection process, the different tensions of the new roll and the old roll are not considered, which causes the new roll to deform, and when the old roll is cut off, due to the sudden release of the elastic force of the old roll, the cut-off part deforms, both of which will cause the roll at the connection to not meet the standards.

[0004] This solution proposes that when it is determined that the supply roll is exhausted, an auxiliary shaft is used to assist in connecting the supply roll and the replacement roll, and at the same time, the same-tension maintenance strategy is executed. During the connection process, the pulling forces on the replacement roll and the supply roll are kept the same. Finally, the roll in the clamping mechanism is released, and the end connection strategy is executed to connect the released roll and the replacement roll. Summary of the Invention

[0005] The present invention provides a processing technology for medical chitosan dressings to help solve the problems mentioned in the above background art.

[0006] The present invention provides the following technical solution: A processing technology for medical chitosan dressings, including:

[0007] Obtain the roll for packaging medical chitosan dressings, where the roll is divided into a supply roll and a replacement roll;

[0008] Add a clamping mechanism to the shaft of the supply roll, and the clamping mechanism includes a groove, and a cylinder is used in the groove to clamp one end of the supply roll;

[0009] Detect whether the supply roll is exhausted;

[0010] When the supply coil is exhausted, the replacement coil and the supply coil are connected using an adhesive;

[0011] The specific method is as follows:

[0012] Set the length of the coil connection, denoted as the connection length;

[0013] Set up an auxiliary shaft to assist in connecting the replacement coil and the supply coil;

[0014] Record the moment when it is detected that the supply coil is exhausted as the first moment;

[0015] Execute a timing duration calculation strategy to obtain the timing duration. Among them, after the first moment, the auxiliary shaft is pushed after an interval of the timing duration to connect the supply coil and the replacement coil;

[0016] Execute the same tension maintenance strategy to keep the tensions of the supply coil and the replacement coil the same during the connection process;

[0017] Obtain the linear velocity of the rotation of the supply coil and execute an equal ratio calculation strategy to calculate the linear velocity of the replacement coil;

[0018] Unwind the replacement coil at the calculated linear velocity. When the connection between the replacement coil and the supply coil is completed, execute an end connection strategy to connect the coil held in the clamping mechanism and the replacement coil.

[0019] Optionally, the detection of whether the supply coil is exhausted includes:

[0020] Make a plane parallel to the horizontal plane through the axis of the supply coil, denoted as the horizontal plane;

[0021] The horizontal plane divides the supply coil into upper and lower parts, denoted as the first segmented coil and the second segmented coil respectively;

[0022] segmented coil;

[0023] Obtain the tangent line of the plane formed by the wound supply coil and the unwound supply coil, denoted as the transition line, where the transition line is located in the second segmented coil;

[0024] Denote the direction in which the supply coil is stretched as the stretching direction;

[0025] Make a straight line pointing to the ground through the midpoint of the axis of the supply coil, denoted as the vertical line;

[0026] The angle between the straight line in the stretching direction and the straight line in the vertical direction is an acute angle;

[0027] Make a vertical plane downward through the axis of the supply coil, denoted as the vertical plane;

[0028] The vertical plane divides the supply coil into two parts. Denote the part containing the transition line as the third segmented coil,

[0029] Record the other part as the fourth segmented coil.

[0030] Draw a line parallel to the horizontal plane and perpendicular to the vertical plane through the midpoint of the axis of the supply coil, and record it as the horizontal line.

[0031] Take a picture of the fourth segmented coil on the horizontal line from a perspective perpendicular to the vertical plane.

[0032] Obtain the taken picture and make a determination on the picture:

[0033] When the coil on the supply coil is used up, a separating line segment is formed between the remaining material of the supply coil and the shaft.

[0034] Record the separating line segment as the demarcation line.

[0035] Judge whether the demarcation line appears on the picture.

[0036] If the demarcation line appears, it is determined that the coil is used up.

[0037] If the demarcation line does not appear, it is determined that the coil is not used up.

[0038] Optionally, the auxiliary shaft for assisting in replacing the coil and connecting the supply coil includes:

[0039] Obtain the shaft of the supply coil, and record it as the supply shaft. The shape of the supply shaft is a cylinder.

[0040] Place the supply shaft and the auxiliary shaft in parallel so that the axes of the supply shaft and the auxiliary shaft are on the same horizontal plane.

[0041] Set a number of rows of protruding nails on the auxiliary shaft to reinforce the connection between the supply coil and the replacement coil.

[0042] Optionally, the execution of the timing duration calculation strategy includes:

[0043] Obtain the connection length;

[0044] Obtain any bottom surface of the supply shaft;

[0045] Obtain the radius of the bottom surface and record it as the supply radius;

[0046] Calculate 360° * connection length / (2 * * supply radius), and record the result as the fixed-point angle;

[0047] On the bottom surface, make a radius pointing to the axis of the auxiliary shaft and record it as the fixed-point radius;

[0048] After rotating the fixed-point radius in the opposite direction of the unwinding direction of the supply coil by the fixed-point angle, obtain the position point of the rotated fixed-point radius on the circumference of the bottom surface and record it as the fixed point.

[0049] Optionally, the execution timing duration calculation strategy includes:

[0050] Obtain the line segment corresponding to the dividing line on the picture on the supply axis, denoted as the separation line;

[0051] Obtain the intersection point of the separation line and the bottom surface, denoted as the separation point;

[0052] Obtain the arc length between the separation point and the fixed point on the bottom surface;

[0053] Obtain the angular velocity of the supply axis;

[0054] Calculate arc length / (angular velocity * supply radius), and denote the result as the timing duration.

[0055] Optionally, the execution same-tension maintenance strategy includes:

[0056] Measure the tension on the plane of the supply coil where the supply coil is stretched, denoted as the standard tension;

[0057] Measure the total distance that the coil per unit length is stretched under the standard tension, denoted as the unit stretching distance;

[0058] Measure the length of the coil reserved for connecting the supply coil in the replacement coil, denoted as the first length;

[0059] Calculate the first length * unit stretching distance, and denote the result as the second length;

[0060] Calculate the second length - the first length, and denote the result as the interval distance;

[0061] Denote one end of the replacement coil used for connection as the connection end, and let the coil reserved for connection in the replacement coil hang naturally, so that the connection end is between the auxiliary axis and the supply axis, where the horizontal distance between the connection end and the replacement axis is 3 cm;

[0062] Keep the auxiliary axis stationary and point the convex nail on the auxiliary axis towards the supply axis;

[0063] When it is judged at the first moment that the supply coil is exhausted, and after the first moment passes through the timing duration, push the auxiliary axis to bond the connection end to the remaining material of the supply coil;

[0064] Fix the replacement coil not to rotate and vertically lift the replacement coil by a height of the interval distance.

[0065] Optionally, the execution equal-ratio calculation strategy includes:

[0066] When the replacement coil is lifted by the interval distance, rotate the replacement coil so that the unwinding direction of the replacement coil is the same as the unwinding direction of the supply coil;

[0067] Rotate the auxiliary shaft in a direction opposite to the unwinding direction of the replacement coil, and the linear velocity of the rotation of the auxiliary shaft is equal to the linear velocity of the rotation of the supply shaft;

[0068] Calculate the angular velocity of the rotating replacement coil, and the calculation method is:

[0069] Obtain the angular velocity of the supply shaft, denoted as the first angular velocity;

[0070] Obtain the distance from the axis of the replacement coil to the outermost coil, denoted as the replacement radius;

[0071] Calculate the supply radius * the first angular velocity / the replacement radius, and denote the result as the second angular velocity, which is used as the angular velocity of the rotation of the axis of the replacement coil.

[0072] Optionally, the execution end connection strategy includes:

[0073] Calculate the connection length / (the supply radius * the first angular velocity), and denote the result as the connection duration;

[0074] Denote the moment when the replacement coil and the supply coil start to be connected as the second moment;

[0075] At an interval of the connection duration after the second moment, connect the coil in the clamping mechanism and the replacement coil, and the connection method is:

[0076] Obtain the interval distance;

[0077] Lower the replacement shaft vertically downward by a height equal to the interval distance;

[0078] Release the coil clamped by the clamping mechanism;

[0079] Rotate the supply shaft in the opposite direction of the unwinding direction to push the auxiliary shaft to connect the released coil and the replacement coil.

[0080] The present invention has the following beneficial effects:

[0081] 1. In the processing technology of the medical chitosan dressing, by adding an auxiliary shaft on the side of the supply shaft to assist in connecting the supply coil and the replacement coil, that is, placing the replacement coil between the auxiliary shaft and the supply shaft, and applying pressure to the coil at the connection by pushing the auxiliary shaft to increase the strength of the connection. At the same time, the auxiliary shaft rotates simultaneously with the supply shaft under the friction of the coil, ensuring that every part of the connection meets the standard, enhancing the reliability of the connection, reducing the possibility of disconnection at the connection, and improving the production efficiency.

[0082] 2. For the processing technology of this medical chitosan dressing, since it has been determined that the supply coil has been exhausted and the thickness of the single-layer coil is extremely small, when obtaining the radius of the supply shaft, the thickness of the single-layer coil is not considered to be added to the radius; a radius pointing to the auxiliary axis is made on the bottom surface of the supply shaft to obtain the fixed-point radius, that is, the end point of the fixed-point radius on the bottom surface circumference is denoted as the connection end point. Then the connection end point is the position point on the bottom surface of the line segment where the replacement coil and the supply coil start to connect. The fixed-point angle is calculated according to the connection length. After rotating the fixed-point radius in the opposite direction of the unwinding direction of the supply coil by the fixed-point angle, the intersection point of the rotated fixed-point radius and the bottom surface circumference is obtained, which is the fixed point. That is, the arc length between the fixed point and the connection end point on the bottom surface circumference is the connection length. The purpose of calculating the fixed point is to facilitate the subsequent calculation of when to connect the replacement coil and the supply coil. The connection length is converted from the arc length on the bottom surface to the point position, which is convenient for controlling the connection accuracy and simplifying the connection complexity.

[0083] 3. For the processing technology of this medical chitosan dressing, when it is judged that the supply coil has been exhausted, the dividing line at this time must be due to one end of the supply coil being exposed to the outside. The photos taken of the shaft surface and the coil surface on both sides of one end of the supply coil are different due to different materials, resulting in an obvious dividing line. At this time, it can be determined that there is only one layer of coil on the supply shaft. The line segment corresponding to the dividing line on the supply shaft is obtained to get the separation line, and the intersection point of the separation line and the bottom surface is obtained, which is the separation point. The separation point is used as the first-level signal for connecting the coils. At this time, the arc length between the separation point and the fixed point is obtained. According to the angular velocity of the supply shaft, the time required to rotate the arc length is calculated to get the timing duration, which is used as the second-level signal for connecting the coils. After an interval of the timing duration after the first moment, the connection operation is executed. By first converting the connection length into a point on the bottom surface of the supply shaft, then converting the point into an arc length on the bottom surface into time, and finally, the connection operation is executed through the time judgment signal, which simplifies the connection steps and improves the efficiency. Judging that the coil is exhausted can meet the requirement that the bonding length of the coil meets the connection length while achieving the maximum utilization efficiency of the supply coil.

[0084] 4. In the processing technology of this medical chitosan dressing, when connecting the replacement coil and the supply coil, the supply coil is subjected to the pulling force of the conveyor belt, but the replacement coil is not subjected to any pulling force. If the replacement coil remains without any pulling force, the thickness of the replacement coil at the connection will be too thick, resulting in obvious connection marks during packaging. At this time, it is necessary to apply a pulling force to the replacement coil, and the magnitude of the pulling force is the same as that of the supply coil, to avoid the supply coil being stretched while the replacement coil is not stretched, which may cause the coil to bend during connection and result in unqualified connection. At the same time, stretching the replacement coil ensures that the stress between the coils at the connection part is the same and the connection is qualified. At this time, the magnitude of the pulling force is converted into the extended length of the coil. By calculating the total length of the coil change caused by stretching the unit length of the coil under the standard pulling force, the unit stretching distance is obtained. Then, by calculating the total distance that the replacement coil is stretched when it is subjected to the same magnitude of pulling force, the distance that the replacement coil needs to increase currently is obtained, and the interval distance is obtained. Converting the pulling force into distance simplifies the operation steps, and at the same time keeps the thickness at the connection part the smallest. And because the coils at the connection part are connected under the same pulling force, when the coils at the connection part are subjected to the pulling force of the conveyor belt subsequently, the possibility of disconnection is small, improving the production efficiency.

[0085] 5. In the processing technology of this medical chitosan dressing, when no connection signal is received, the connection end of the replacement coil is located between the auxiliary shaft and the supply shaft and is 3 cm away from the supply shaft. Therefore, it reduces the possibility that the replacement coil is affected and misconnected during the unwinding process of the supply coil. Only when a connection signal is received, the connection end of the replacement coil and the supply coil are connected, reducing the probability of misoperation during the production process and improving the production efficiency.

[0086] 6. In the processing technology of this medical chitosan dressing, after the connection starts, the coils conveyed by the conveyor belt at the connection part include both the replacement coil and the supply coil at the same time. Therefore, the replacement coil and the supply coil must move the same distance in the same time. On the rotating shaft, it means that the linear velocities of the supply shaft and the replacement coil are equal. At this time, since the supply coil has been used up, the radius of the supply shaft can be directly obtained. However, the coil on the replacement coil cannot be ignored. Therefore, the radius of rotation of the replacement coil includes the radius of the shaft and the thickness of the coil, which is used as the replacement radius. According to the equal linear velocity, the second angular velocity is calculated as the angular velocity of the shaft rotation of the replacement coil, so as to ensure that the same length of coil is unwound from the two coils in the same time and ensure the continuity of the production process and improve the production efficiency.

[0087] 7. In the processing technology of this medical chitosan dressing, after the connection is completed, some of the coiled materials in the clamping mechanism are not connected. To avoid waste of raw materials, after releasing the coiled materials in the clamping mechanism, the coiled materials are also connected to the replacement coiled materials. At this time, since the released coiled materials are not under tension while the replacement coiled materials are under tension, to ensure the reliability and qualification rate of the connection, the replacement coiled materials are lowered to eliminate the tension of the unconnected coiled materials on the replacement coiled materials and prevent the supply coiled materials from being stretched. However, the replacement coiled materials are not stretched, which may cause the coiled materials to bend during connection, resulting in unqualified connection. At the same time, stretching the replacement coiled materials ensures that the stress between the connected coiled materials is the same and the connection is qualified. At the same time, the supply shaft is rotated in the opposite direction of the unwinding direction, so that the supply shaft and the auxiliary shaft simultaneously squeeze the surplus materials of the supply coiled materials, and then the released coiled materials and the replacement coiled materials are connected, increasing the connection strength, avoiding waste, and improving the reliability of the connection. Brief Description of the Drawings

[0088] Figure 1 It is a schematic structural diagram of the present invention.

[0089] Figure 2 It is a schematic diagram of the supply shaft and the auxiliary shaft of the present invention.

[0090] Figure 3 It is a schematic diagram of the position of the demarcation line of the present invention in the photographed picture.

[0091] Figure 4 It is a schematic diagram of the relationship between the first segmented coiled material and the second segmented coiled material of the present invention.

[0092] Figure 5 It is a schematic diagram of the relationship between the third segmented coiled material and the fourth segmented coiled material of the present invention. Detailed Embodiments

[0093] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0094] Embodiment 1. Refer to Figure 1 , a processing technology of a medical chitosan dressing;

[0095] Clean and dry the raw materials for producing chitosan;

[0096] Add an acidic solution to the dried raw materials to remove the minerals therein, and then add an alkaline solution for treatment to obtain chitosan;

[0097] Mix the extracted chitosan with an acetic acid solution to obtain a chitosan solution;

[0098] Pour the chitosan solution onto a flat surface and heat it for curing to obtain a film.

[0099] Add a crosslinking agent to the film and dry it to obtain a chitosan dressing.

[0100] Cut and package the chitosan dressing. During the packaging process:

[0101] Obtain a roll of packaging medical chitosan dressing, where the roll is divided into a supply roll and a replacement roll.

[0102] Add a clamping mechanism to the shaft of the supply roll. The clamping mechanism includes a groove, and a cylinder is used to clamp one end of the supply roll in the groove.

[0103] Detect whether the supply roll is used up.

[0104] When the supply roll is used up, connect the replacement roll and the supply roll with an adhesive.

[0105] The specific method is as follows:

[0106] Set the length of the roll connection, denoted as the connection length.

[0107] Set up an auxiliary shaft for assisting the connection of the replacement roll and the supply roll.

[0108] Record the moment when it is detected that the supply roll is used up as the first moment.

[0109] Execute a timing duration calculation strategy to obtain a timing duration. After the first moment, push the auxiliary shaft after an interval of the timing duration to connect the supply roll and the replacement roll.

[0110] Execute a same-tension holding strategy to keep the tensions of the supply roll and the replacement roll the same during the connection process.

[0111] Obtain the linear velocity of the rotation of the supply roll and execute an equal-proportion calculation strategy to calculate the linear velocity of the replacement roll.

[0112] Unwind the replacement roll at the calculated linear velocity. When the connection between the replacement roll and the supply roll is completed, execute an end connection strategy to connect the roll clamped in the clamping mechanism and the replacement roll.

[0113] The detection of whether the supply roll is used up includes:

[0114] Make a plane parallel to the horizontal plane through the axis of the supply roll, denoted as the horizontal plane.

[0115] The horizontal plane divides the supply roll into upper and lower parts, denoted as the first segmented roll and the second segmented roll respectively.

[0116] roll.

[0117] Obtain the tangent line formed by the wound supply coil and the unwound supply coil that is tangent to the plane, denoted as the transition line, where the transition line is located on the second segmented coil;

[0118] Denote the direction in which the supply coil is stretched as the stretching direction;

[0119] Draw a straight line pointing to the ground through the midpoint of the axis of the supply coil, denoted as the vertical straight line;

[0120] The included angle between the straight line in the stretching direction and the vertical straight line is an acute angle;

[0121] In this embodiment, refer to Figure 4 , the relationship between the first segmented coil and the second segmented coil is as shown in the figure, where the included angle in the figure is an acute angle.

[0122]

[0123] Draw a vertical plane downward through the axis of the supply coil, denoted as the vertical plane;

[0124] The vertical plane divides the supply coil into two parts. Denote the part containing the transition line as the third segmented coil,

[0125] Denote the other part as the fourth segmented coil;

[0126] Draw a straight line parallel to the horizontal plane and perpendicular to the vertical plane through the midpoint of the axis of the supply coil, denoted as the horizontal straight line;

[0127] Take a picture of the fourth segmented coil on the horizontal straight line from a perspective perpendicular to the vertical plane;

[0128] In this embodiment, as Figure 5 shown, the relationship between the third segmented coil and the fourth segmented coil is as shown in the figure, where the shooting point is the position point for shooting the fourth segmented coil.

[0129] Obtain the taken picture and make a determination on the picture:

[0130] When the coil on the supply coil is used up, a separating line segment is formed between the remaining material of the supply coil and the shaft;

[0131] Denote the separating line segment as the demarcation line;

[0132] Judge whether the demarcation line appears in the picture;

[0133] In this embodiment, taking the pictures of the supply shaft and the supply coil as the training set for training, and then comparing the pictures taken during the actual production process with the pictures in the training set to judge whether the demarcation line appears. This technical solution is the prior art.

[0134] If a demarcation line appears, it is determined that the supply coil is exhausted;

[0135] If no demarcation line appears, it is determined that the supply coil is not exhausted.

[0136] In this embodiment, referring to Figure 3 , the photos of the supply shaft and the supply coil are different, and an obvious demarcation line appears, so it is considered that the supply coil is exhausted.

[0137] The provided device for assisting in connecting the replacement coil and the supply coil includes:

[0138] Obtain the shaft of the supply coil, denoted as the supply shaft, and the shape of the supply shaft is a cylinder;

[0139] Place the supply shaft and the auxiliary shaft in parallel such that the axes of the supply shaft and the auxiliary shaft are on the same horizontal plane;

[0140] Set a number of rows of protruding nails on the auxiliary shaft for strengthening the connection between the supply coil and the replacement coil.

[0141] In this embodiment, referring to Figure 2 , the positional relationship between the auxiliary shaft and the supply shaft.

[0142] By adding an auxiliary shaft on the side of the supply shaft to assist in connecting the supply coil and the replacement coil, that is, placing the replacement coil between the auxiliary shaft and the supply shaft, and applying pressure to the coil at the connection by pushing the auxiliary shaft to increase the connection strength. At the same time, the auxiliary shaft rotates simultaneously with the supply shaft under the frictional force of the coil, ensuring that every connection point meets the standard, enhancing the connection reliability, reducing the possibility of disconnection at the connection, and improving the production efficiency.

[0143] The execution of the timing duration calculation strategy includes:

[0144] Obtain the connection length;

[0145] Obtain any bottom surface of the supply shaft;

[0146] Obtain the radius of the bottom surface, denoted as the supply radius;

[0147] Calculate 360° * connection length / (2 * * supply radius), and denote the result as the fixed-point angle;

[0148] Make a radius on the bottom surface pointing to the axis of the auxiliary shaft, denoted as the fixed-point radius;

[0149] After rotating the fixed-point radius in the opposite direction of the unwinding direction of the supply coil by the fixed-point angle, obtain the position point of the rotated fixed-point radius on the circumference of the bottom surface, denoted as the fixed point.

[0150] Since it has been determined that the supply coil has been exhausted and the thickness of the single-layer coil is extremely small, when obtaining the radius of the supply shaft, the thickness of the single-layer coil is not considered to be added to the radius; a radius pointing to the auxiliary axis is made on the bottom surface of the supply shaft to obtain the fixed-point radius, that is, the end point of the fixed-point radius on the bottom surface circumference is denoted as the connection end point. Then the connection end point is the position point on the bottom surface of the line segment where the replacement coil and the supply coil start to connect. The fixed-point angle is calculated according to the connection length. After rotating the fixed-point radius in the opposite direction of the unwinding direction of the supply coil by the fixed-point angle, the intersection point of the rotated fixed-point radius and the bottom surface circumference is obtained, which is the fixed point. That is, the arc length between the fixed point and the connection end point on the bottom surface circumference is the connection length. The purpose of calculating the fixed point is to facilitate the subsequent calculation of when to connect the replacement coil and the supply coil. The connection length is converted from the arc length on the bottom surface to a point position, which is convenient for controlling the connection accuracy and simplifying the connection complexity.

[0151] The execution of the timing duration calculation strategy includes:

[0152] Obtain the line segment corresponding to the demarcation line on the picture on the supply shaft, denoted as the separation line;

[0153] Obtain the intersection point of the separation line and the bottom surface, denoted as the separation point;

[0154] Obtain the arc length between the separation point and the fixed point on the bottom surface;

[0155] Obtain the angular velocity of the supply shaft;

[0156] Calculate arc length / (angular velocity * supply radius), and record the result as the timing duration.

[0157] When it is judged that the supply coil has been exhausted, the demarcation line at this time must be due to one end of the supply coil being exposed to the outside. The photos taken of the shaft surface and the coil surface on both sides of one end of the supply coil are different due to different materials, resulting in an obvious demarcation. At this time, it can be determined that there is only one layer of coil on the supply shaft. Obtain the line segment corresponding to the demarcation line on the supply shaft to get the separation line, and the intersection point of the separation line and the bottom surface to get the separation point. The separation point is used as the first-level signal for connecting the coil. At this time, obtain the arc length between the separation point and the fixed point, and according to the angular velocity of the supply shaft, calculate the time required to rotate the arc length to get the timing duration, which is used as the second-level signal for connecting the coil. After an interval of the timing duration after the first moment, perform the connection operation. By first converting the connection length into a point on the bottom surface of the supply shaft, then converting the point into an arc length on the bottom surface to time, and finally, performing the connection operation through the time judgment signal, the connection steps are simplified and the efficiency is improved.

[0158] The execution of the same-tension maintenance strategy includes:

[0159] Measure the tension on the plane of the supply coil that is stretched, denoted as the standard tension;

[0160] The total distance that a coiled material of unit length is stretched under a standard tensile force is denoted as the unit stretching distance;

[0161] Measure the length of the coiled material reserved for connecting the supply coiled material in the replacement coiled material, denoted as the first length;

[0162] Calculate the first length * unit stretching distance, and the result is denoted as the second length;

[0163] Calculate the second length - the first length, and the result is denoted as the interval distance;

[0164] When connecting the replacement coiled material and the supply coiled material, the supply coiled material is subjected to the tensile force of the conveyor belt, but the replacement coiled material is not subjected to any tensile force. If the replacement coiled material is kept without any tensile force, it will cause the thickness of the replacement coiled material at the connection to be too thick, resulting in obvious connection marks during packaging. At this time, a tensile force needs to be applied to the replacement coiled material, and the magnitude of the tensile force is the same as that of the supply coiled material. At this time, the magnitude of the tensile force is converted into the extended length of the coiled material, and the total length of the change in the coiled material caused by stretching the unit length of the coiled material under the standard tensile force is calculated to obtain the unit stretching distance. Furthermore, the total distance that the replacement coiled material is stretched when subjected to the same magnitude of tensile force is calculated to obtain the distance that the replacement coiled material currently needs to increase, and the interval distance is obtained. Converting the tensile force into distance simplifies the operation steps, and at the same time keeps the thickness at the connection minimum. And because the coiled material at the connection is connected under the same tensile force, when the coiled material at the connection is subjected to the tensile force of the conveyor belt later, the possibility of disconnection is small, improving the production efficiency.

[0165] Denote one end of the replacement coiled material used for connection as the connection end, and let the coiled material reserved for connection in the replacement coiled material hang naturally, so that the connection end is between the auxiliary shaft and the supply shaft. Among them, the horizontal distance between the connection end and the replacement shaft is 3 cm;

[0166] When no connection signal is received, the connection end of the replacement coiled material is located in the middle between the auxiliary shaft and the supply shaft and is 3 cm away from the supply shaft. Therefore, it reduces the possibility that the replacement coiled material is affected and misconnected during the unwinding process of the supply coiled material. Only when a connection signal is received, the connection end of the replacement coiled material and the supply coiled material are connected, reducing the probability of misoperation during production and improving production efficiency.

[0167] Keep the auxiliary shaft stationary and point the protrusion on the auxiliary shaft towards the supply shaft;

[0168] When it is judged at the first moment that the supply coiled material is used up, and after the first moment passes through the timed duration, push the auxiliary shaft to bond the connection end to the remaining material of the supply coiled material;

[0169] Fix the replacement coiled material so that it does not rotate, and vertically lift the replacement coiled material by a height equal to the interval distance.

[0170] The execution of the equal ratio calculation strategy includes:

[0171] After the replacement coil is lifted upward by the interval distance, rotate the replacement coil so that the unwinding direction of the replacement coil is the same as the unwinding direction of the supply coil.

[0172] Rotate the auxiliary shaft in the direction opposite to the unwinding direction of the replacement coil, and the linear velocity of the rotation of the auxiliary shaft is equal to the linear velocity of the rotation of the supply shaft.

[0173] Calculate the angular velocity of the rotating replacement coil, and the calculation method is:

[0174] Obtain the angular velocity of the supply shaft, denoted as the first angular velocity.

[0175] Obtain the distance from the axis of the replacement coil to the outermost coil, denoted as the replacement radius.

[0176] Calculate supply radius * first angular velocity / replacement radius, and record the result as the second angular velocity, which is used as the angular velocity of the rotation of the axis of the replacement coil.

[0177] After the start of connection, the coil conveyed by the conveyor belt includes both the replacement coil and the supply coil at the connection point. Therefore, the replacement coil and the supply coil must move the same distance in the same time. On the rotating shaft, it means that the linear velocities of the rotation of the supply shaft and the replacement coil are equal. At this time, since the supply coil has been exhausted, directly obtain the radius of the supply shaft, but the coil on the replacement coil cannot be ignored. Therefore, the rotation radius of the replacement coil includes the radius of the shaft and the thickness of the coil, which is used as the replacement radius. According to the equal linear velocity, calculate the second angular velocity as the angular velocity of the rotation of the axis of the replacement coil, so as to ensure that the two coils unwind the same length of coil in the same time, ensure the continuity in the production process, and improve the production efficiency.

[0178] The execution of the end connection strategy includes:

[0179] Calculate connection length / (supply radius * first angular velocity), and record the result as the connection duration.

[0180] Record the moment when the replacement coil and the supply coil start to be connected as the second moment.

[0181] At the time interval of the connection duration after the second moment, connect the coil in the clamping mechanism with the replacement coil, and the connection method is:

[0182] Obtain the interval distance.

[0183] Lower the replacement shaft vertically downward by a height of the interval distance.

[0184] Release the coil clamped by the clamping mechanism.

[0185] Rotate the supply shaft in the direction opposite to the unwinding direction to push the auxiliary shaft to connect the released coil and the replacement coil.

[0186] After the connection is completed, some of the coils in the clamping mechanism are not connected. To avoid waste of raw materials, after releasing the coil in the clamping mechanism, connect the coil to the replacement coil as well. At this time, since the released coil is not under tension while the replacement coil is under tension, to ensure the connection reliability and qualification rate, lower the replacement coil to eliminate the tension of the unconnected coil on the replacement coil. At the same time, rotate the supply shaft in the direction opposite to the unwinding direction so that the supply shaft and the auxiliary shaft simultaneously squeeze the remaining material of the supply coil, and then connect the released coil and the replacement coil to increase the connection strength, avoid waste, and improve the connection reliability.

[0187] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0188] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A processing technology for medical chitosan dressing, characterized in that: include: Obtaining a roll material for packaging a medical chitosan dressing, wherein the roll material is divided into a supply roll material and a replacement roll material; A clamping mechanism is added to the shaft of the supply coil, wherein the clamping mechanism includes a groove in which a cylinder is used to clamp one end of the supply coil; Check whether the supplied coil is exhausted; When the supply coil is exhausted, the replacement coil and the supply coil are connected using an adhesive; The specific method is: Set the length of the coil connection, recorded as the connection length; An auxiliary shaft is provided for assisting the replacement of coils and the connection of the supply coils; The moment when the supply coil is detected to be exhausted is recorded as the first moment; Execute the timing duration calculation strategy to obtain the timing duration, wherein the auxiliary shaft is pushed to connect the supply coil and the replacement coil after the timing duration has elapsed after the first moment; Implement the same tension maintenance strategy to keep the tension of the supply coil and the replacement coil the same during the connection process; Obtain the linear speed of the supply coil, execute the proportional calculation strategy, and calculate the linear speed of the replacement coil; The replacement coil is unwound at the calculated line speed, and when the replacement coil is connected to the supply coil, an end connection strategy is executed to connect the coil clamped in the clamping mechanism to the replacement coil; The method of detecting whether the supplied coil is exhausted comprises: A plane parallel to the horizontal plane is made through the axis of the supply coil and is recorded as the horizontal plane; The horizontal plane divides the supply coil into two parts, upper and lower, which are respectively recorded as the first segment coil and the second segment coil; Obtaining a tangent line between a plane formed by a wound supply coil and an unwound supply coil, and recording it as a transition line, wherein the transition line is located at the second segmented coil; The direction in which the supply coil is stretched is recorded as the stretching direction; Draw a straight line through the midpoint of the axis of the supply coil pointing to the ground, which is recorded as the vertical straight line; The angle between the straight line where the stretching direction is located and the vertical straight line direction is an acute angle; A plane is made vertically downward through the axis of the supply coil, which is recorded as the vertical plane; The vertical plane divides the supply coil into two parts, the part containing the transition line is recorded as the third section coil, and the other part is recorded as the fourth section coil; A straight line parallel to the horizontal plane and perpendicular to the vertical plane is drawn through the midpoint of the axis of the supply coil, which is recorded as the horizontal straight line; photographing the fourth segmented coil on the horizontal straight line at a viewing angle perpendicular to the vertical plane; Get the captured picture and make judgment on it: When the coil on the supply coil is exhausted, a separation line segment is formed between the remaining material of the supply coil and the shaft; The dividing line segment is recorded as the dividing line; Determine whether a dividing line appears on the image; If a dividing line appears, it is considered that the coil is exhausted; If no dividing line appears, it is deemed that the coil has not been used up; The auxiliary shaft provided for assisting the connection of the replacement coil and the supply coil comprises: Obtaining an axis for supplying coiled material, denoted as supply axis, wherein the shape of the supply axis is a cylinder; Place the supply shaft and the auxiliary shaft in parallel so that the axes of the supply shaft and the auxiliary shaft are in the same horizontal plane; Several rows of protruding nails are arranged on the auxiliary shaft for reinforcing the connection of the supply coil and the replacement coil; The execution timing duration calculation strategy includes: Get the connection length; Get any bottom surface of the supply axis; Get the radius of the bottom surface, recorded as the supply radius; Calculate 360°*connection length / (2*π*supply radius), and record the result as the fixed point angle; Make a radius on the bottom surface pointing to the axis of the auxiliary shaft, which is recorded as the fixed point radius; After rotating the fixed point radius by a fixed point angle in the opposite direction of the unwinding direction of the supply coil, the position point of the fixed point radius on the bottom surface circumference after rotation is obtained and recorded as the fixed point; The execution timing duration calculation strategy includes: Get the line segment corresponding to the dividing line on the image on the supply axis, and record it as the separation line; Get the intersection point of the separation line and the bottom surface, and record it as the separation point; Get the arc length between the separation point and the fixed point on the bottom surface; Get the angular velocity of the supply axis; Calculate arc length / (angular velocity*supply radius), and record the result as the timing duration; The implementation of the same tension maintenance strategy includes: Measure the tension on the plane of the coil where the supply coil is stretched, and record it as the standard tension; Measure the total distance that a unit length of coil is stretched under standard tension, which is recorded as unit stretching distance; measuring the length of the coil reserved for connecting the supply coil by the replacement coil, and recording it as the first length; Calculate the first length * unit stretching distance, and record the result as the second length; Calculate the second length minus the first length, and record the result as the interval distance; One end of the replacement coil for connection is marked as the connection end, and the coil reserved for connection of the replacement coil is naturally dropped so that the connection end is between the auxiliary shaft and the supply shaft, wherein the horizontal distance between the connection end and the replacement shaft is 3 cm; Keep the auxiliary shaft fixed and point the convex pin on the auxiliary shaft toward the supply shaft; When it is determined at the first moment that the supply coil is exhausted and after the first moment has elapsed for a timed period, the auxiliary shaft is pushed to bond the connection end to the remaining material of the supply coil; The replacement coil is fixed without rotation, and the replacement coil is raised vertically upward, and the raised height is the spacing distance.

2. The processing technology of medical chitosan dressing according to claim 1, characterized in that: The execution of the equal proportion calculation strategy includes: When the replacement coil is raised upward by the spacing distance, the replacement coil is rotated so that the unwinding direction of the replacement coil is the same as the unwinding direction of the supply coil; Rotate the auxiliary shaft in a direction opposite to the direction of unwinding of the replacement coil, and the linear speed of the auxiliary shaft is equal to the linear speed of the supply shaft; Calculate the angular velocity of the rotating replacement coil as follows: Obtain the angular velocity of the supply shaft, recorded as the first angular velocity; Obtain the distance from the axis of the replacement coil to the outermost coil, which is recorded as the replacement radius; Calculate supply radius*first angular velocity / replacement radius, and record the result as second angular velocity, which is the angular velocity of the axis rotation of the replacement coil.

3. The processing technology of medical chitosan dressing according to claim 2, characterized in that: The execution of the terminal connection strategy includes: Calculate the connection length / (supply radius*first angular velocity), and record the result as the connection duration; The moment when the replacement coil and the supply coil begin to connect is recorded as the second moment; After the second moment, at the interval connection time, the coil in the clamping mechanism is connected with the replacement coil in the following manner: Get the interval distance; Lower the replacement shaft vertically downward to a height corresponding to the spacing distance; releasing the coil held by the clamping mechanism; The supply shaft is rotated in the opposite direction of the unwinding direction, and the auxiliary shaft is pushed to connect the released roll and the replacement roll.

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