A fixed-length cutting system for cylindrical medicaments

Abstract

The application discloses a fixed-length cutting system for columnar medicaments, comprising a work platform, a conveying unit located on the work platform and used for conveying columnar medicaments at a preset conveying speed along a conveying direction, a following unit located downstream of the conveying unit and movably connected with the work platform, and a cutting unit located on the following unit, wherein the following unit can drive the cutting unit to move back and forth in the conveying direction synchronously, so that the cutting unit cuts the columnar medicaments at the same instantaneous speed as the preset conveying speed. The application drives the cutting unit by the movable following unit, so that the cutting unit realizes uninterrupted cutting at the same instantaneous speed as the preset conveying speed at the cutting moment, effectively improves the fixed-length control precision of the columnar medicaments, reduces the damage of cutting to the columnar medicaments, and improves the cutting efficiency and cutting yield.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical processing technology, and in particular to a fixed-length cutting system for columnar pharmaceutical preparations. Background Technology

[0002] Currently, the cutting process for columnar pharmaceuticals is mostly completed manually or with general-purpose bar cutting equipment. Manual cutting is not only labor-intensive and inefficient, but also suffers from poor cutting accuracy and difficulty in ensuring product consistency. General-purpose bar cutting equipment is mostly specialized equipment designed for processing rigid materials such as metals and hard plastics, and is not suitable for soft columnar pharmaceuticals. These columnar pharmaceuticals are soft, easily deformed, and prone to chipping, which can easily lead to defects such as uneven cross-sections, excessive length deviations, and waste during cutting. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention provides a fixed-length cutting system for columnar pharmaceutical preparations, the technical solution of which is as follows: This invention provides a fixed-length cutting system for columnar pharmaceutical preparations, comprising: Work platform A conveying unit, located on the working platform, is used to convey columnar medicine along the conveying direction at a preset conveying speed; A follower unit is located downstream of the conveying unit and is movably connected to the working platform; A cutting unit is located on the following unit. The following unit can drive the cutting unit to move synchronously back and forth in the conveying direction, so that the cutting unit cuts the columnar medicine at the same instantaneous speed as the preset conveying speed.

[0004] Furthermore, the working platform is provided with a first driving component; the conveying unit includes a transmission wheel assembly and at least one conveying channel, the conveying channel being used to place the columnar medicine, the first driving component being drivenly connected to the transmission wheel assembly, the transmission wheel assembly being used to contact the columnar medicine to drive the columnar medicine to move.

[0005] Furthermore, the conveying unit also includes a shock-absorbing component, which includes a mounting component and multiple pressure rollers. The mounting component is located on both sides of the conveying channel. The mounting component is provided with multiple mounting parts, which are upwardly protruding structures. The pressure rollers are rotatably connected to the mounting parts and are supported above the conveying channel.

[0006] Furthermore, the working platform is also provided with a second driving component; the following unit includes a transmission rod and a support platform, the support platform being movably connected to the working platform, and the cutting unit being located on the support platform; The transmission rod is arranged parallel to the conveying direction, and the second driving member is connected to one end of the transmission rod. The transmission rod is also connected to the support platform. The second driving member can drive the transmission rod to move axially, so as to drive the support platform and the cutting unit to move back and forth along the conveying direction.

[0007] Furthermore, the following unit also includes an elastic sealing tube, which is sleeved on the transmission rod.

[0008] Furthermore, the cutting unit includes a third drive element, a transmission gear assembly, a grooved cam, a cutting channel, and at least one blade assembly, wherein the cutting channel is located downstream of the delivery channel and is used for the passage of the columnar agent; The output end of the third driving component is connected to the transmission gear assembly, the grooved cam is connected to the transmission gear assembly and rotates synchronously, and the grooved cam is rotatably sleeved on the cutting channel; The blade assembly is provided with a cam follower, and the inner edge of the end face of the grooved cam can contact at least one of the cam follower during rotation, for driving the at least one blade assembly to move to cut the columnar drug.

[0009] Furthermore, the cutting unit also includes a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate being connected to the support platform respectively, the grooved cam being rotatably connected to the first mounting plate; the second mounting plate is provided with at least one cutting guide, and the blade assembly is slidably connected to the cutting guide.

[0010] Furthermore, the blade assembly includes a cutting blade, a connector, and at least one positioning member, wherein the tip of the cutting blade is positioned toward the center of the cutting channel in a plane perpendicular to the conveying direction, and the cutting blade is inserted into the gap of the connector; The connector has at least one first positioning hole, and the cutting blade has at least one second positioning hole. The cutting blade and the connector are fixedly connected through the positioning holes, the first positioning holes, and the second positioning holes.

[0011] Furthermore, the fixed-length cutting system for columnar pharmaceuticals also includes a control unit, the control unit comprising: The length determination module is used to integrate the preset conveying speed and duration of the conveying unit to obtain the length information of the columnar medicine; the length information is used to indicate the conveying length of the columnar medicine through the cutting unit; The drive module is used to control the following unit to move downstream in the conveying direction at an instantaneous speed equal to the preset conveying speed when the conveying length reaches the preset length, and to control the cutting unit to cut the columnar medicine.

[0012] Furthermore, the fixed-length cutting system for columnar pharmaceuticals also includes multiple sealed housings, with the first drive unit, the second drive unit, and the third drive unit of the cutting unit on the working platform respectively sealed within each of the sealed housings.

[0013] Implementing this invention has the following beneficial effects: This invention employs a following unit to drive the cutting unit to move relative to the working platform in the conveying direction. This allows the cutting unit to continuously follow and cut the columnar pharmaceutical agent at an instantaneous speed identical to the preset conveying speed. This effectively adapts to the characteristics of columnar pharmaceutical agents, such as their soft texture, easy deformation, and tendency to chip, avoiding defects such as uneven cut surfaces, excessive length deviations, and waste. This improves the cutting yield and product quality of columnar pharmaceutical agents. At the same time, the cutting unit's instantaneous cutting speed identical to the preset conveying speed greatly improves the accuracy of fixed-length cutting of columnar pharmaceutical agents. Furthermore, automated production ensures good cutting consistency, significantly improving the cutting efficiency and product quality consistency of columnar pharmaceutical agents. Attached Figure Description

[0014] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the embodiments will be briefly described below, wherein the same components are represented by the same reference numerals. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of a fixed-length cutting system for columnar pharmaceuticals provided in an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the positional relationship between an extrusion unit and a conveying channel, provided as an embodiment of the present invention. Figure 3 for Figure 1 A partial enlarged view of the conveyor unit; Figure 4 for Figure 1 A schematic diagram of the drive connection structure between the follower unit and the cutting unit; Figure 5 This is a cross-sectional schematic diagram of a connection structure between a driven gear and a grooved cam provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the mounting structure of a grooved cam provided in an embodiment of the present invention; Figure 7 This is a three-dimensional structural diagram of a grooved cam provided in an embodiment of the present invention; Figure 8 A schematic diagram of the arrangement structure of multiple blade assemblies provided in an embodiment of the present invention; Figure 9 for Figure 8 A schematic diagram of the rear of the arrangement structure of multiple blade assemblies; Figure 10 This is a schematic diagram of the linkage structure between a grooved cam and a cam follower provided in an embodiment of the present invention; Figure 11 A schematic diagram of a transmission structure for a driven gear and blade assembly provided in an embodiment of the present invention; Figure 12 This is a schematic diagram of a blade assembly provided in an embodiment of the present invention.

[0016] The corresponding reference numerals in the figure are as follows: 1-Working platform, 11-First drive component, 12-Second drive component, 13-Lifting platform, 14-Lifting bracket, 15-Following guide component, 2-Conveying unit, 21-Conveying channel, 22-Transmission wheel assembly, 220-Driven conveyor wheel, 221-Driven conveyor wheel, 23-Anti-vibration component, 230-Setting component, 231-Pressure roller, 24-Extrusion unit, 25-Diameter detection device, 3-Following unit, 31-Transmission rod, 32-Support platform, 320-Moving component, 33-Elastic sealing pipe component, 4-Cutting unit, 41-Third drive component, 410-Second coupling, 42-Transmission gear assembly, 420-Driven gear, 421-Driven gear, 43-Groove cam, 430 - Sleeve, 431- First bearing, 432- Bearing end cap, 433- First anti-loosening component, 434- Second bearing, 435- Second anti-loosening component, 44- Cutting channel, 440- First channel, 441- Second channel, 45- Blade assembly, 450- Cam follower, 451- Cutting blade, 452- Connector, 4520- Sliding part, 4521- Connector, 4522- Mounting part, 4523- Limiting part, 453- Positioning component, 454- Reset component, 46- First mounting plate, 47- Second mounting plate, 470- Cutting guide, 471- Limiting component, 5- Columnar reagent, 6- Sealing housing, 7- Feed channel, 71- Laser sensor, 72- Plasma electrostatic eliminator. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments, and therefore should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that, in the description of this invention, the following definitions of terms shall apply unless a different definition is given elsewhere in the claims or this specification. All numerical values, whether explicitly indicated or not, are defined herein as being modified by the term "about." The term "about" generally refers to a range of numerical values ​​that a person skilled in the art would consider equivalent to the stated values ​​to produce substantially the same properties, functions, results, etc. A range of numerical values ​​indicated by a low value and a high value is defined as including all numerical values ​​within that range and all subranges included within that range.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such objects can be used interchangeably where appropriate so that embodiments of the invention can be implemented in orders other than those illustrated or described below. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, or product comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, or products.

[0020] Implantable drug formulations are increasingly used in clinical treatment due to their advantages such as precise drug delivery, long-lasting effect, and few side effects. The production of these formulations requires the raw materials to be made into cylindrical forms of specific dimensions. The precision of the column's length directly determines the accuracy of the dosage, thus having a crucial impact on clinical treatment efficacy and medication safety.

[0021] Currently, in the pharmaceutical industry, the cutting process of columnar pharmaceutical preparations is mostly completed manually or with general-purpose bar cutting equipment. Manual cutting is not only labor-intensive and inefficient, but also suffers from poor cutting precision, difficulty in ensuring product consistency, and the risk of introducing external contamination during operation, failing to meet the requirements of Good Manufacturing Practices (GMP). General-purpose bar cutting equipment is primarily designed for processing rigid materials such as metals and hard plastics, making it unsuitable for the soft, easily deformed, and chipped characteristics of columnar pharmaceutical preparations. This often results in uneven cut surfaces, excessive length deviations, and damaged or wasted pharmaceutical columns. Furthermore, existing cutting equipment generally lacks design for dust-free and sterile pharmaceutical manufacturing conditions, with insufficient sealing performance and ease of cleaning, failing to meet the stringent standards of the pharmaceutical industry for sterile and clean production environments.

[0022] To address at least one of the aforementioned technical problems, embodiments of the present invention provide a fixed-length cutting system for columnar pharmaceutical preparations, such as... Figure 1 As shown, the fixed-length cutting system for columnar pharmaceuticals includes a working platform 1, a conveying unit 2, a following unit 3, and a cutting unit 4. The conveying unit 2 is located on the working platform 1 and is used to convey the columnar pharmaceuticals 5 along the conveying direction at a preset conveying speed. The following unit 3 is located downstream of the conveying unit 2 and is movably connected to the working platform 1. The cutting unit 4 is located on the following unit 3 and can drive the cutting unit 4 to move synchronously back and forth in the conveying direction, so that the cutting unit 4 cuts the columnar pharmaceuticals 5 at the same instantaneous speed as the preset conveying speed.

[0023] In some exemplary embodiments, the preset conveying speed can be a pre-set speed, which is a fixed value; in other exemplary embodiments, the preset conveying speed can be a dynamic speed monitored during the conveying process, which is a dynamically changing value, so as to improve the consistency between the instantaneous speed of the cutting unit 4 during cutting and the preset conveying speed, improve cutting efficiency, length control accuracy and cutting stability, effectively improve the flatness of the cut surface and the length consistency of the relatively soft columnar agent 5, and avoid cutting damage and waste of the columnar agent 5.

[0024] Thus, the columnar agent 5 is conveyed by the conveying unit 2 at a preset conveying speed, and the following unit 3 is displaced in the conveying direction based on the preset conveying speed, so that the cutting module can achieve uninterrupted following cut at the same instantaneous speed as the preset conveying speed at the moment of cutting. This not only adapts to the characteristics of the columnar agent 5, which is soft, easily deformed, and prone to chipping, resulting in a flat cross-section and a significant reduction in the breakage and waste of the columnar agent 5, but also ensures high precision in length control after cutting, with qualified and consistent lengths. The automated uninterrupted following cut can also greatly improve cutting efficiency.

[0025] like Figure 2 As shown, an extrusion unit 24 is provided upstream of the conveying channel 21. The extrusion unit 24 is used to extrude columnar agent 5, and the extrusion port of the extrusion unit is correspondingly set to the inlet of the conveying channel 21 so that the columnar agent 5 can be transferred to the conveying channel 21 for subsequent automated cutting operations.

[0026] In some exemplary implementations, such as Figure 2 As shown, the conveying unit 2 is also equipped with a diameter detection device 25, which is used to detect the diameter of the columnar agent 5 on the conveying unit 2, thereby improving the accuracy of the morphology of the columnar agent 5. In some preferred embodiments, the conveying unit 2 is equipped with multiple diameter detection devices 25, wherein at least one diameter detection device 25 is located at the inlet of the conveying channel 21 or at the extrusion port of the extrusion unit 24, for detecting the diameter of the columnar agent 5 currently in a flexible state. In addition, there is also at least one diameter detection device 25 located on the side of the conveying channel 21 near the cutting unit 4, for detecting the diameter of the columnar agent 5 after cooling and solidification through the conveying channel 21. Optionally, the diameter detection device 25 includes a diameter detection laser, which is accurate and easy to arrange.

[0027] like Figure 1 As shown, in some exemplary embodiments, the center of the conveying channel 21 and the center of the cutting channel 44 in the subsequent cutting unit 4 are located on the same axis, avoiding positional deviation that could damage the columnar agent 5, and improving the overall operating accuracy, stability, and reliability of the fixed-length cutting system for columnar agents. In some optional embodiments, the working platform 1 is provided with a lifting platform 13 and at least one lifting bracket 14. One end of the lifting bracket 14 is connected to the working platform 1, and the other end is connected to the lifting platform 13, so that the lifting bracket 14 can effectively support the lifting platform 13. The height of the lifting platform 13 is higher than that of the working platform 1, and the conveying unit 2 is disposed on the lifting platform 13 to increase the height of the conveying unit 2 and improve the cutting compatibility between the conveying unit 2 and the cutting unit 4. In addition, the space between the lifting platform 13 and the working platform 1 can also be used to accommodate subsequent components such as the second driving component 12, improving space utilization.

[0028] Specifically, such as Figure 1 As shown, the working platform 1 is provided with a first driving component 11, which is used to drive the conveying unit 2 to convey the columnar medicine 5 at a preset conveying speed. In some exemplary embodiments, the first driving component 11 can be a servo motor, which has high control precision, can effectively improve the accuracy of the preset conveying speed, and has a fast dynamic response, which can maintain the dynamic stability of the preset conveying speed.

[0029] like Figure 1 and Figure 3As shown, the conveying unit 2 includes a drive wheel assembly 22 and at least one conveying channel 21, which extends along the conveying direction and is used to place columnar medicine 5; in some optional embodiments, the conveying channel 21 is a V-shaped channel, that is, the cross-sectional area of ​​the conveying channel 21 is V-shaped, and the columnar medicine 5 is placed on the surface of the V-shaped channel.

[0030] The first driving component 11 is driven to connect with the transmission wheel assembly 22. The transmission wheel assembly 22 is used to contact the columnar medicine 5 to drive the columnar medicine 5 to move, thereby improving the delivery effectiveness, delivery accuracy and delivery stability.

[0031] In some exemplary embodiments, the conveying unit 2 includes a conveying channel 21, and in the conveying direction, the drive wheel assembly 22 is located upstream or downstream of the conveying channel 21; in other exemplary embodiments, the conveying unit 2 includes multiple conveying channels 21, which are arranged at intervals along the conveying direction, and the drive wheel assembly 22 is located between two adjacent conveying channels 21; for example, Figure 3 As shown, the conveying unit 2 includes two conveying channels 21 and a set of drive wheel assemblies 22. The drive wheel assembly 22 is located between the downstream end face of one conveying channel 21 and the upstream end face of the other conveying channel 21, which provides good controllability, high conveying accuracy and good conveying stability.

[0032] Specifically, in some exemplary implementations, such as Figure 3 As shown, the transmission wheel assembly 22 includes an active conveying wheel 220 and a driven conveying wheel. The first driving member 11 is connected to the active conveying wheel 220, and the active conveying wheel 220 is connected to the driven conveying wheel. The columnar medicine 5 passes between the active conveying wheel 220 and the driven conveying wheel. The conveying unit 2 controls the preset conveying speed by controlling the linear speed of the active conveying wheel 220 and / or the linear speed of the driven conveying wheel (i.e., the linear speed of the transmission wheel assembly 22). It has high conveying accuracy and good conveying stability.

[0033] There is a gap between the active conveyor wheel 220 and the driven conveyor wheel, which allows the columnar agent 5 to pass through and come into contact with the columnar agent 5. Without excessively squeezing the columnar agent 5, the rotation of the active conveyor wheel 220 and the driven conveyor wheel drives the columnar agent 5 to move along the conveying direction.

[0034] In some optional embodiments, the active conveying wheel 220 and the driven conveying wheel can be rubber-coated wheels, which include an inner hard wheel and a covering layer surrounding the hard wheel; wherein, the hard wheel can be made of stainless steel, which is low in cost and easy to maintain a sterile environment; the covering layer can be made of fluororubber, which can provide a certain degree of elasticity, avoid applying excessive pressure to the columnar drug 5 during the conveying process, which would cause the columnar drug 5 to deform or even break, thus helping to maintain the stability and reliability of the conveying, and is resistant to sterilization by 35% hydrogen peroxide vapor and also resistant to moist heat sterilization, making it suitable for achieving a Class 100 clean and sterile environment.

[0035] In some exemplary embodiments, the active conveyor wheel 220 is located above the driven conveyor wheel, and with the conveying direction as a reference, the linear velocity direction of the bottom end of the active conveyor wheel 220 and the linear velocity direction of the top end of the driven conveyor wheel are parallel to the conveying direction; in other exemplary embodiments, such as Figure 3 As shown, the active conveyor wheel 220 is located below the driven conveyor wheel. With the conveying direction as the reference, the linear velocity direction of the top of the active conveyor wheel 220 and the linear velocity direction of the bottom of the driven conveyor wheel are parallel to the conveying direction. In this way, the transmission wheel assembly 22 is set up flexibly and conveniently, while maintaining good conveying accuracy and conveying stability.

[0036] Specifically, in some exemplary embodiments, the conveying unit 2 further includes a first coupling (not shown), the output end of the first drive member 11 is drivenly connected to the first coupling, and the first coupling is drivenly connected to the transmission wheel assembly 22. Specifically, the first coupling is drivenly connected to the active conveying wheel 220 in the transmission wheel assembly 22, so as to effectively transmit the power of the first drive member 11 to the active conveying wheel 220 and the driven conveying wheel, while compensating for the offset caused by installation errors or thermal deformation.

[0037] Specifically, such as Figure 3 As shown, the conveying unit 2 also includes a vibration damping component 23, which is used to limit the vibration of the columnar medicine 5 during the conveying process. The vibration damping component 23 includes a mounting member 230 and multiple pressure rollers 231. The mounting member 230 is located on both sides of the conveying channel 21. Specifically, it can be detachably connected to the conveying channel 21 by fixing elements such as pins and / or screws. The mounting member 230 is located on both sides of the conveying channel 21 to avoid contact with the columnar medicine 5 and to avoid affecting the conveying efficiency and conveying stability of the columnar medicine 5 by the conveying channel 21. In some preferred embodiments, the mounting members 230 are symmetrically arranged on both sides of the conveying channel 21, which is beneficial to improve the vibration damping balance.

[0038] In some exemplary embodiments, the pressure roller 231 is supported above the conveying channel 21. The mounting member 230 is provided with multiple mounting parts. The pressure roller 231 is rotatably connected to the mounting parts, and the mounting parts are upwardly protruding structures. That is, the mounting parts serve as the rotating shaft of the pressure roller 231. This does not affect the rotation of the pressure roller 231, and can effectively support the pressure roller 231 above the conveying channel 21. While avoiding affecting the normal conveying of the columnar agent 5, it absorbs the vibration that may occur during the conveying of the columnar agent 5, thereby reducing the measurement error of the preset conveying speed of the columnar agent 5 on the conveying channel 21 caused by vibration. This is beneficial for dynamically adjusting the instantaneous speed of the following unit 3 according to the measured preset conveying speed, thereby improving the following and cutting accuracy and following and cutting stability.

[0039] Exemplarily, in some implementations, such as Figure 3 As shown, multiple mounting parts are symmetrically arranged about the axis of the conveying channel 21, and each pressure roller 231 is rotatably connected to two symmetrical mounting parts on both sides, thereby further improving the balance of the pressure roller 231 and its anti-vibration performance.

[0040] Specifically, such as Figure 4 As shown, the working platform 1 is also provided with a second driving component 12, which is used to drive the following unit 3 to move back and forth along the conveying direction. Specifically, when cutting the columnar medicine, the following unit 3 is driven to move instantaneously at the same instantaneous speed as the preset conveying speed and reset after the cutting is completed. Then, the action of instantaneously moving and resetting in the conveying direction is repeated continuously so that the cutting unit 4 can move synchronously with the following unit 3 to achieve uninterrupted following and cutting. In some exemplary embodiments, the second driving component 12 can be a linear motor, which has high control precision, simple and direct drive path, high transmission efficiency, fast response speed, and efficient and accurate following and cutting, which is conducive to the stable and effective operation of uninterrupted automated production.

[0041] Specifically, such as Figure 4 As shown, the following unit 3 includes a transmission rod 31 and a support platform 32. The support platform 32 is movably connected to the working platform 1, and the cutting unit 4 is located on the support platform 32. The transmission rod 31 is arranged parallel to the conveying direction. The second driving member 12 is connected to one end of the transmission rod 31. The transmission rod 31 is also connected to the support platform 32. The second driving member 12 can drive the transmission rod 31 to move axially, so as to drive the support platform 32 and the cutting unit 4 to move back and forth synchronously along the conveying direction. The transmission method is simple, the displacement accuracy is high, and the controllability is good. In some optional embodiments, the transmission rod 31 can move in a telescopic motion along the axial direction. The material can be stainless steel, which is not easy to generate dust or breed bacteria.

[0042] Specifically, in some exemplary implementations, such as Figure 1 and Figure 4As shown, the working platform 1 is provided with at least one following guide 15, and the following unit 3 also includes at least one moving part 320. The moving part 320 is fixedly connected to the support platform 32, and the following guide 15 is slidably connected to the moving part 320. The following guide 15 extends along the conveying direction so that the moving part 320 and the support platform 32 can slide smoothly along the conveying direction, avoid jamming, and improve the accuracy and stability of automated following and cutting.

[0043] In some preferred embodiments, such as Figure 4 As shown, the working platform 1 is provided with multiple following guides 15, which are arranged in parallel. The following unit 3 includes multiple moving parts 320. Each following guide 15 is slidably connected to at least one of the multiple moving parts 320. On the one hand, the multiple following guides 15 can provide multiple points of guidance, which is conducive to improving the guiding balance and guiding stability. On the other hand, at least one moving part 320 is slidably connected to each following guide 15, which can disperse the pressure exerted by the support platform 32 on the following guide 15 through the moving parts 320, which is conducive to improving the stability and balance of the support platform 32, and also conducive to improving the smoothness of the movement of the support platform 32.

[0044] In some exemplary embodiments, the follower guide 15 includes a guide rail, which may be made of stainless steel, and the moving part 320 includes a slider, which is simple and convenient to arrange, has good sliding smoothness, and is low in cost.

[0045] Specifically, such as Figure 1 As shown, the following unit 3 also includes an elastic sealing tube 33, which is sleeved on the transmission rod 31. One end of the elastic sealing tube 33 is sealed to the support platform 32 on the following unit 3, and the other end is sealed to the sealing housing 6 outside the second drive member 12 to seal the transmission rod 31 and prevent dust and grease in the cavity of the second drive member 12 from being carried out during the axial movement of the transmission rod 31, thus avoiding damage to the dust-free and sterile environment of the fixed-length cutting system for columnar agents. In addition, the elastic sealing tube 33 can provide good elasticity and can extend and retract during the movement of the following unit 3, thus avoiding restriction on the smooth movement of the transmission rod 31 and the following unit 3, and ensuring good operational stability.

[0046] In some alternative implementations, the resilient sealing fitting 33 includes a bellows, which is easy to install and low in cost.

[0047] Specifically, such as Figure 4-8As shown, the cutting unit 4 includes a third driving member 41, a transmission gear assembly 42, a grooved cam 43, a cutting channel 44, and at least one blade assembly 45. The output end of the third driving member 41 is connected to the transmission gear assembly 42. The transmission gear assembly 42 is connected to the grooved cam 43 and rotates synchronously. The grooved cam 43 is rotatably sleeved on the cutting channel 44 and is connected to the blade assembly 45. The cutting channel 44 is located downstream of the conveying channel 21 and is used to allow the columnar agent 5 to pass through for cutting. The transmission method is simple and precise, with good controllability and high cutting accuracy.

[0048] Among them, such as Figure 4 As shown, the third drive unit 41 is used to drive the blade assembly 45 to move through the transmission gear assembly 42 and the grooved cam 43 to cut the columnar medicine 5. In some exemplary embodiments, the third drive unit 41 can be a servo motor, which has high control precision and fast response speed, and can effectively improve the accuracy of driving the blade assembly 45, and improve the cutting effectiveness, precision and stability.

[0049] In some exemplary implementations, such as Figure 4 As shown, the transmission gear assembly 42 includes a driving gear 420 and a driven gear 421 that mesh with each other. The third driving member 41 is connected to the driving gear 420, and the driven gear 421 is detachably connected to the grooved cam 43. Thus, the power of the third driving member 41 is transmitted to the grooved cam through the driving gear 420 and the driven gear 421, resulting in high transmission accuracy and good transmission reliability.

[0050] Specifically, in some exemplary implementations, such as Figure 4 As shown, the cutting unit 4 also includes a second coupling 410. The output end of the third driving member 41 is drivenly connected to the second coupling 410. The second coupling 410 is drivenly connected to the transmission gear assembly 42. Specifically, the second coupling 410 is drivenly connected to the driving gear 420 to effectively transmit the power of the third driving member 41 to the driving gear 420 and the driven gear 421, while compensating for the offset caused by installation errors or thermal deformation.

[0051] Specifically, such as Figure 5 As shown, the cutting unit 4 also includes a first mounting plate 46, which is connected to the support platform 32. The grooved cam 43 is rotatably connected to the first mounting plate 46 to maintain the structural stability and rotational flexibility of the grooved cam 43.

[0052] In some exemplary implementations, such as Figure 5 As shown, a first bearing 431 is fitted on the grooved cam 43. The grooved cam 43 is rotatably connected to the first mounting plate 46 through the first bearing 431. The assembly is convenient and quick, the connection is stable, and the rotation is smooth.

[0053] In some preferred embodiments, one end of the first bearing 431 is provided with an end cap, and one end of the grooved cam 43 is provided with a first anti-loosening element 433. The bearing end cap 432 and the first anti-loosening element 433 are located on the side surface of the first mounting plate 46 near the driven gear 421. The bearing end cap 432 is fixedly connected to the first mounting plate 46 so that the first bearing 431 can be stably connected to the first mounting plate 46, and the grooved cam 43 can rotate smoothly and stably relative to the first mounting plate 46. The first anti-loosening element 433 is sleeved on the outer side of the grooved cam 43. The first anti-loosening element 433 is optionally threaded to the grooved cam 43. At the same time, the end face of the first anti-loosening element 433 near the first mounting plate 46 can abut against the bearing end cap 432 to prevent the first bearing 431 from loosening along the conveying direction. For example, the first anti-loosening element 433 is a square anti-loosening nut to improve the connection stability and reliability.

[0054] In some exemplary implementations, such as Figure 5 and Figure 6 As shown, the grooved cam 43 is provided with a sleeve 430 and a second bearing 434. The cutting channel 44 is detachably installed inside the sleeve 430. Specifically, it can be quickly fixed by fixing elements such as positioning pins or positioning screws, which can play a positioning role during disassembly and assembly, improving the accuracy of the assembly position. The second bearing 434 is sleeved on the sleeve 430, and the grooved cam 43 is sleeved outside the second bearing 434, so that the grooved cam 43 and the sleeve 430 are rotatably connected through the second bearing 434. During the cutting process, the grooved cam 43 can rotate, while the sleeve 430 and the cutting channel 44 will not rotate, which helps to maintain the overall structural stability, cutting accuracy and cutting stability of the cutting unit 4.

[0055] In some optional embodiments, a second anti-loosening member 435 is also provided on the outside of the sleeve 430. The second anti-loosening member 435 is optionally threadedly connected to the sleeve 430. At the same time, the end face of the second anti-loosening member 435 near the driven gear 421 can abut against the second bearing 434 to prevent the second bearing 434 from loosening along the conveying direction. For example, the second anti-loosening member 435 is a square anti-loosening nut to improve the connection stability and reliability.

[0056] In some exemplary implementations, such as Figure 5As shown, the cutting channel 44 has a split structure, including a first channel 440 and a second channel 441. Both the first channel 440 and the second channel 441 extend along the conveying direction. The two are installed together to form the cutting channel 44. Specifically, it can be quickly disassembled and assembled using fixing elements such as pins or screws, which is convenient for disassembly and inspection when the system malfunctions. In addition, during the manufacturing process, the cutting channel 44 needs to be cleaned and sterilized after each batch is produced. The split structure of the cutting channel 44 also facilitates cleaning and sterilization, improving cleanliness and sterility.

[0057] In addition, the cutting channel 44 has a guiding function, which can suppress the jumping of the columnar agent 5 during cutting, thus improving cutting accuracy and cutting stability.

[0058] In some exemplary implementations, such as Figure 7 As shown, the grooved cam 43 is an end-face type internal cylindrical grooved cam.

[0059] Specifically, such as Figure 8 As shown, the cutting unit 4 also includes a second mounting plate 47, which is located on the side of the first mounting plate 46 away from the driven gear 421. The second mounting plate 47 is connected to the support platform 32. The second mounting plate 47 is provided with at least one cutting guide 470, which is located on the surface of the second mounting plate 47 away from the first mounting plate 46. The blade assembly 45 is slidably connected to the cutting guide 470. In this way, the connection stability of the blade assembly 45 is improved by the second mounting plate 47, and the sliding smoothness of the blade assembly 45 during cutting is also improved, which is beneficial to improving cutting efficiency, cutting accuracy and cutting stability.

[0060] In some exemplary embodiments, the cutting guide 470 includes a guide rail, which may be made of stainless steel, making it less prone to dust and bacterial growth; in some preferred embodiments, the guide rail is made of 316L stainless steel.

[0061] Specifically, such as Figure 9 and Figure 10 As shown, the blade assembly 45 is provided with a cam follower 450. The inner edge of the end face of the grooved cam 43 can contact at least one cam follower 450 during rotation, which is used to drive at least one blade assembly 45 to move to cut the columnar agent 5. The second mounting plate 47 is provided with a through hole for the cam follower 450 to be connected to the grooved cam 43 for transmission. Thus, as the grooved cam 43 rotates, it effectively drives the cam follower 450 to drive the blade assembly 45 to move to cut the columnar agent 5. The transmission accuracy is high, which is beneficial to improving the cutting accuracy and cutting stability.

[0062] It should be noted that, for example Figure 10As shown, on the cross-section of the grooved cam 43, the distance between the inner edge of the end face and the center of the circle corresponding to the central axis of the grooved cam 43, that is, the cross-sectional radius corresponding to different areas of the inner edge of the end face, is different. This allows the cam follower 450 to move under the pushing force of different areas of the inner edge of the end face during the rotation of the grooved cam 43, thereby driving the blade assembly 45 to move within the cross-section. Specifically, as the cross-sectional radius corresponding to the contact point between the cam follower 450 and the inner edge of the end face of the grooved cam 43 gradually decreases, the blade assembly 45 is driven to move towards the columnar agent 5 to cut the columnar agent 5. Conversely, as the cross-sectional radius corresponding to the contact point gradually increases, the blade assembly 45 is driven to move away from the columnar agent 5. After cutting, the blade assembly 45 quickly returns to its original position to avoid affecting the stable cutting of the next section of columnar agent 5. The cutting accuracy is high and the degree of automation is high.

[0063] Specifically, such as Figure 8 and Figure 11 As shown, the blade assembly 45 includes a cutting blade 451, a connector 452, and at least one positioning element 453. The tip of the cutting blade 451 is positioned on a plane perpendicular to the conveying direction and faces the center of the cutting channel 44 to facilitate contact with the columnar agent 5 during cutting. The connector 452 is slidably connected to the cutting guide 470 on the second mounting plate 47. The cutting blade 451 is inserted into the gap of the connector 452 so that the connector 452 drives the cutting blade 451 to move synchronously. The connector 452 has at least one first positioning hole (not shown), and the cutting blade 451 has at least one second positioning hole (not shown). The cutting blade 451 and the connector 452 are fixedly connected through the positioning elements 453, the first positioning holes, and the second positioning holes. This provides accurate and convenient positioning, improves the stability of the cutting blade 451, and helps to improve cutting accuracy and stability. In addition, the cutting blade 451 may become dull after long-term use. The connection method of the positioning elements 453, the first positioning holes, and the second positioning holes facilitates the replacement of the cutting blade 451.

[0064] In some exemplary embodiments, the connector 452 has a first positioning hole, and the cutting blade 451 has a second positioning hole. The positioning member 453 passes through the first positioning hole and the second positioning hole to detachably fix the cutting blade 451 to the connector 452. In other exemplary embodiments, the connector 452 has a first positioning hole, and the cutting blade 451 has multiple second positioning holes, with the first positioning hole corresponding to one of the multiple second positioning holes. Alternatively, the connector 452 has multiple first positioning holes, and the cutting blade 451 has a second positioning hole, with one of the multiple first positioning holes corresponding to the second positioning hole. In other exemplary embodiments, the connector 452 has multiple first positioning holes, and the cutting blade 451 has multiple second positioning holes, with each of the multiple first positioning holes and the multiple second positioning holes corresponding to one another. Multiple positioning members 453 pass through each of the first positioning holes and the corresponding second positioning holes to achieve connection and secure fixation.

[0065] In some exemplary embodiments, the positioning element 453 includes a pin or screw, and the corresponding first positioning hole and second positioning hole include a pin hole or screw hole.

[0066] Specifically, such as Figure 12 As shown, the connector 452 includes a sliding part 4520, a connecting part 4521, a connecting part 4522, and a limiting part 4523. The sliding part 4520 is slidably connected to the cutting guide 470. The sliding part 4520 and the connecting part 4522 are connected through the connecting part 4521. The limiting part 4523 is located on the side of the connecting part 4521 away from the connecting part 4521. The gap between the limiting part 4523 and the connecting part 4522 is used to place the cutting blade 451. A first positioning hole is opened on the limiting part 4523 so that the positioning member 453 passes through the first positioning hole and the second positioning hole to be fixed. The assembly is convenient and the fixation is reliable.

[0067] Optionally, the cam follower 450 can be set on the cutting blade 451, on the connecting part 4521, or on the connecting part 4522, allowing for flexible setting and precise driving.

[0068] Specifically, in some exemplary implementations, such as Figure 12 As shown, the blade assembly 45 also includes a reset member 454, which is disposed on the connecting portion 4521; as Figure 8 As shown, the second mounting plate 47 is provided with at least one limiting member 471. When the cutting blade 451 moves to cut, the limiting member 471 can abut against the reset member 454 so that when the blade assembly 45 completes the cutting by following the trajectory of the groove cam 43, the blade assembly 45 is driven to quickly reset, so as to avoid affecting the subsequent delivery of the columnar medicine 5.

[0069] In some alternative implementations, the reset element 454 can be a reset spring, which is convenient and quick to assemble and has high reset efficiency.

[0070] In some exemplary embodiments, a reset hole is provided on the connecting part 4521, and a reset member 454 is disposed in the reset hole. The reset member 454 includes an adjusting part and an elastic part, wherein the elastic part abuts against the limiting member 471 and is moderately compressed; the adjusting part is located on the side of the elastic part away from the limiting member 471, and the adjusting part abuts against the elastic part; the adjusting part is detachably disposed in the reset hole, and the adjusting part can move axially in the reset hole to adjust the tightness of the elastic part, that is, to adjust the rebound force of the elastic part. On the one hand, this allows the elastic part to be effectively and quickly reset after cutting, and on the other hand, it avoids the elastic part being too tight and the rebound force required for reset being too large, which may cause jamming; optionally, the adjusting part includes a set screw, which has good controllability and is convenient and labor-saving to adjust.

[0071] In some preferred embodiments, each blade assembly 45 is provided with a plurality of reset members 454, which are symmetrically arranged about the central axis of the cutting blade 451 to improve reset balance and stability.

[0072] In some exemplary embodiments, the cutting unit 4 includes a blade assembly 45 with a cutting blade 451 facing the center of the cutting channel 44. During the cutting process, the groove cam 43 rotates, driving the cam follower 450 to move toward the center of the cutting channel 44 to cut the columnar agent 5 on the cutting channel 44.

[0073] In some other exemplary embodiments, the cutting unit 4 includes a plurality of blade assemblies 45, and the cutting blades 451 of each blade assembly 45 are all arranged facing the center of the cutting channel 44; in some preferred embodiments, the cutting unit 4 includes a plurality of blade units, and the plurality of blade units are symmetrically arranged about the center of the cutting channel 44 to improve cutting balance, reduce the damage to the columnar agent 5 caused by the single-sided force applied by the cutting blade 451, and improve cutting efficiency and cutting yield; and the tips of the plurality of cutting blades 451 do not contact each other and leave a certain gap to reduce the wear of the cutting blades 451.

[0074] For example, such as Figure 8 As shown, the cutting unit 4 includes four blade units, such as... Figure 10As shown, the grooved cam 43 has a fourth-order rotationally symmetric shape. The inner edge of the end face of the grooved cam 43 can contact the four cam followers 450 during rotation, so that the four cam followers 450 follow the grooved cam 43 and synchronously drive the four blade assemblies 45 to move towards the center of the cutting channel 44 to cut the columnar agent 5. That is, the driven gear 421 or the grooved cam 43 rotates 90°, and the four blade assemblies 45 can achieve synchronous feeding and cutting in one go. The cutting accuracy is high, and the cutting point of the columnar agent 5 is evenly stressed, resulting in a flat cut (non-oblique cut), no chipping of the cutting end face, good cutting stability, and effective improvement of cutting yield and cutting efficiency.

[0075] Specifically, such as Figure 1 As shown, the fixed-length cutting system for columnar agents also includes a discharge channel 7, which is located downstream of the cutting channel 44 and is used to receive columnar agents 5 cut to a preset length by the cutting unit 4. In some optional embodiments, the discharge channel 7 is inclined in the vertical direction, and the end of the discharge channel 7 near the cutting channel 44 is higher than the end of the discharge channel 7 away from the cutting channel 44, so that the columnar agents 5 can fall into the collection device.

[0076] Specifically, such as Figure 1 As shown, the fixed-length cutting system for columnar pharmaceuticals also includes a laser sensor 71, which monitors the position of the cut columnar pharmaceuticals 5 to determine whether the columnar pharmaceuticals 5 have left the cutting channel 44 and entered the feeding channel 7. The laser sensor 71 can send the monitored position information to the control unit of the fixed-length cutting system for columnar pharmaceuticals. This position information is used to indicate the position of the cut columnar pharmaceuticals 5, so that the control unit can make a judgment based on the position information and issue an error if it determines that the laser sensor 71 has not detected any material, so as to remind the operator that the fixed-length cutting system for columnar pharmaceuticals is faulty. Taking two columnar pharmaceuticals per second as an example, if the laser sensor 71 does not detect any material within 1 second, an error can be issued.

[0077] Specifically, such as Figure 1As shown, the fixed-length cutting system for columnar drugs also includes a plasma static eliminator 72, used to remove static electricity generated during cutting or rubbing of the columnar drug when the columnar drug 5 is a columnar drug, to prevent the columnar drug from being attracted to the surrounding area due to static electricity and affecting the cutting effect. For example, the main components of the goserelin acetate sustained-release implant are PLGA (polylactic acid-glycolic acid copolymer) biodegradable polymer and goserelin. The PLGA biodegradable polymer will generate static electricity when rubbed. If the fixed-length cutting system for columnar drugs provided in this embodiment of the invention is used to cut the goserelin acetate sustained-release implant, static electricity is easily generated during cutting, and the weight after cutting is in the milligram range. It is lightweight and easily attracted to the surrounding area. The plasma static eliminator 72 can effectively remove static electricity and avoid affecting the cutting effect.

[0078] Specifically, such as Figure 1 As shown, the fixed-length cutting system for columnar pharmaceuticals also includes multiple sealed housings 6. The first drive component 11, the second drive component 12, and the third drive component 41 on the working platform 1 are respectively sealed within each sealed housing 6. The first drive component 11, the second drive component 12, and the third drive component 41 have complex structures and many gaps, which can easily generate dust and breed bacteria. By isolating them with the sealed housings 6, dust and bacteria can be prevented from contaminating the columnar pharmaceuticals 5, maintaining a dust-free and sterile working environment. This meets the stringent standards for dust-free and sterile pharmaceutical use conditions for material cutting equipment, especially for material cutting equipment in the pharmaceutical field.

[0079] In some exemplary embodiments, a sealing housing 6 is also provided around the transmission gear assembly 42. On the one hand, this prevents dust, oil, and other contaminants in the gaps of the transmission gear assembly 42 from contaminating the columnar agent 5. On the other hand, it prevents the transmission gear assembly 42 from accidentally injuring the operator and improves system safety.

[0080] In some optional embodiments, the sealing housing 6 is made of stainless steel; wherein the components of the first drive member 11, the second drive member 12 and the third drive member 41 that are prone to oxidation, corrosion and dust and bacteria are all housed inside their respective stainless steel sealing housings 6.

[0081] Furthermore, the stainless steel used in the embodiments of the present invention may include 316L stainless steel, which is resistant to 35% hydrogen peroxide vapor sterilization and also resistant to moist heat sterilization, making it suitable for achieving a Class 100 clean and sterile environment.

[0082] In some exemplary embodiments, the sealing housing 6 includes a protective cover, a base, and an elastic seal. The protective cover and the base are detachably connected, and the protective cover and the base are sealed together by the elastic seal. Optionally, the elastic seal includes a fluororubber gasket, which has good sealing performance, is easy to install, and is inexpensive.

[0083] In addition, the fixed-length cutting system for columnar pharmaceuticals is located entirely inside a sterile isolation chamber to maintain a Class 100 clean and sterile working environment, further reducing the risk of contamination.

[0084] In some exemplary embodiments, the columnar drug 5 can be selected as a columnar drug. The fixed-length cutting system for columnar drugs is applied in the field of pharmaceutical processing equipment. It can be used to cut subcutaneously implanted columnar drugs to a fixed length, adapting to the soft and easily deformable material characteristics of columnar drugs. It has high-precision fixed-length control, adaptability to dust-free and sterile working environment and automated process connection capability. It solves the defects of poor cutting accuracy, low cutting consistency and high risk of contamination in the prior art for relatively soft columnar drugs, and greatly improves the production quality and production efficiency of implantable columnar drugs.

[0085] Specifically, the length-cutting system for columnar pharmaceuticals also includes a control unit, which comprises: The length determination module is used to integrate based on the preset conveying speed and duration of the conveying unit 2 to obtain the length information of the columnar medicine 5; the length information is used to indicate the conveying length of the columnar medicine 5 through the cutting unit 4; The drive module is used to control the following unit 3 to move downstream in the conveying direction at an instantaneous speed of the same as the preset conveying speed when the conveying length reaches the preset length, and to control the cutting unit 4 to cut the columnar medicine 5.

[0086] The preset conveying speed is the same as the linear speed of the drive wheel assembly 22 (active conveying wheel 220 and driven conveying wheel). In the upstream of the conveying unit 2, the extrusion speed of the columnar agent 5 is mostly constant and the same as the initial linear speed of the drive wheel assembly 22. Therefore, during the conveying process of the conveying unit 2, the linear speed of the drive wheel assembly 22 fluctuates. The linear speed of the drive wheel assembly 22 is dynamically adjusted by the PID system, which is the preset conveying speed. In other words, the preset conveying speed is dynamically fluctuated and changed by the extrusion speed upstream of the columnar agent 5.

[0087] The preset conveying speed can be obtained by setting a sensor element to monitor the linear speed of the transmission wheel assembly 22. Accordingly, during the conveying process, the sensor element can send speed monitoring information to the control unit. The speed monitoring information is used to indicate the linear speed of the transmission wheel assembly 22. Then, the control unit can receive the speed monitoring information and send a control command to the output based on the speed monitoring information. The conveying control command is used to drive the first drive member 11 to output power to dynamically adjust the linear speed of the transmission wheel assembly 22 so that the adjusted linear speed approaches the extrusion speed.

[0088] Next, by integrating the dynamically changing preset conveying speed and duration, the conveying length of the columnar agent 5 through the cutting unit 4 can be determined, that is, the conveying length of the columnar agent 5 within this time range can be determined. This allows for further judgment on whether the conveying length is equal to the preset length. If the conveying length is equal to the preset length, a follow command is output. This follow command drives the second drive unit 12, which in turn drives the support platform 32 and the cutting unit 4 as a whole to move downstream in the conveying direction at the same instantaneous speed as the current preset conveying speed via the transmission rod 31. A cutting command is then output, which drives the third drive unit 12. The actuator 41 drives the cutting blade 451 of the blade assembly 45 to move towards the center of the cutting channel 44 through the transmission gear assembly 42, the grooved cam 43, and the cam follower 450 to achieve cutting. Then, at the moment the cutting is completed, the second drive member 12 rotates in the opposite direction, and drives the support platform 32 to move in the opposite direction through the transmission rod 31 to achieve reset. The support platform 32 takes a very short time to make one round trip, and can immediately perform the next cutting without affecting the continuous cutting of the next columnar agent 5. The overall automation level is high, the continuous cutting efficiency is high, the control accuracy of the columnar agent 5 is high, the product consistency is also high, and the product yield can be greatly improved.

[0089] It should be noted that during the conveying process of the conveying unit 2, the curing diameter of the columnar agent 5 can be controlled by adjusting the flexible diameter of the columnar agent 5 detected by the diameter detection device 25 located at the extrusion port and changing the linear speed of the transmission wheel assembly 22. The diameter detection device 25 located at the extrusion port is used to detect the flexible diameter of the columnar agent 5 extruded from the extrusion unit 24 to the upstream of the conveying channel 21. At this time, the columnar agent 5 is in a flexible state, and its diameter can still change to a certain extent. Then the control unit: Obtain the current flexible diameter; When there is a deviation between the current flexible diameter and the target diameter, and the flexible diameter is larger than the target diameter, the first driving component is controlled to drive the transmission wheel assembly to accelerate until the updated flexible diameter matches the target diameter. If there is a deviation between the current flexible diameter and the target diameter and the flexible diameter is smaller than the target diameter, control the first driving component to drive the transmission wheel assembly to decelerate until the updated flexible diameter matches the target diameter; With the current flexible diameter matching the target diameter, the first drive component is controlled to maintain the current preset conveying speed.

[0090] The target diameter is a preset value that can be adjusted according to the type of columnar agent to be cut. It can be a point value, such as 1.1 mm, or a numerical range, such as 1.08 mm to 1.15 mm.

[0091] In some exemplary embodiments, the control unit uses PID control to calculate the change in the linear speed of the transmission wheel assembly 22 and feeds it back to the first drive component 11 for adjustment. In this way, by controlling the change in the linear speed of the transmission wheel assembly 22, the flexible diameter of the columnar agent 5 and the cured diameter after cooling and curing can be precisely controlled.

[0092] On the other hand, embodiments of the present invention provide a method for cutting columnar pharmaceutical preparations to a fixed length, comprising: The length information of the columnar drug is obtained by integrating the preset conveying speed and duration of the conveying unit; the length information is used to indicate the conveying length of the columnar drug through the cutting unit. When the conveying length reaches the preset length, the control follower unit moves downstream in the conveying direction at the same instantaneous speed as the preset conveying speed, and controls the cutting unit to cut the columnar medicine.

[0093] The fixed-length cutting method for columnar pharmaceuticals is based on the same concept as the system embodiment, and its specific implementation process is detailed in the system embodiment, which will not be repeated here.

[0094] During operation, the columnar medicine to be cut is placed on the conveying channel 21 of the conveying unit 2 and enters the gap between the active conveying wheel 220 and the driven conveying wheel. The first driving member 11 drives the active conveying wheel 220 to rotate, which in turn drives the driven conveying wheel to rotate at the same linear speed. Correspondingly, the preset conveying speed of the columnar medicine 5 is the same as this linear speed. At the same time, the pressure roller 231 on the conveying channel 21 can effectively prevent the columnar medicine 5 from shaking on the conveying channel 21. Then, the columnar medicine 5 enters the cutting channel 44 of the cutting unit 4, and the second driving member 12 drives the transmission rod 31 to extend, pushing the support platform 32 and the cutting unit. 4. The entire unit moves in the direction of conveying, and when the conveying length of the columnar agent 5 is determined to reach the preset length according to the integral algorithm of the preset conveying speed and time, the cutting unit 4 is pushed to move at the same instantaneous speed as the preset conveying speed. At the same time, the third driving member 41 drives the driving gear 420, which drives the driven gear 421 and the grooved cam 43 to rotate, and then drives the cam follower 450 to move the blade assembly 45 towards the center of the cutting channel 44 to achieve follow-cutting. At the moment the cutting is completed, the second driving member 12 drives the transmission rod 31 to retract, which drives the support platform 32 and the cutting unit 4 to reset. The time is extremely short to achieve uninterrupted follow-cutting.

[0095] Thus, the columnar agent 5 is conveyed by the conveying unit 2 at a preset conveying speed, and the following unit 3 determines the conveying length of the columnar agent 5 based on the integral algorithm of the preset conveying speed and time. This allows the cutting unit 4 to continuously follow and cut at the same instantaneous speed at the moment of cutting, resulting in a flat cutting surface, high precision in length control, high length consistency, high degree of automation, and high cutting efficiency. It is also suitable for dust-free and sterile working environments. By adjusting the integral algorithm, it is possible to cut and produce columnar agents 5 of different specifications and lengths. The cutting unit 4 can be matched with cutting blades 451 of different thicknesses and cutting channels 44 of different diameters to achieve the cutting and production of columnar agents 5 of different specifications and diameters. This effectively adapts to the characteristics of columnar agents 5, which are soft, easily deformed, and prone to chipping. The cutting surface is flat, the length is highly consistent, and material breakage and waste are greatly reduced.

[0096] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0097] The above description is merely some embodiments of the present invention and is not intended to limit the present invention. Those skilled in the art should understand that the present invention can have various changes and improvements, and any modifications, equivalent substitutions and improvements made in accordance with the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A fixed-length cutting system for columnar pharmaceutical preparations, characterized in that, include: Work platform (1), The conveying unit (2) is located on the working platform (1) and is used to convey columnar medicine (5) along the conveying direction at a preset conveying speed. The following unit (3) is located downstream of the conveying unit (2) and is movably connected to the working platform (1); The cutting unit (4) is located on the following unit (3). The following unit (3) can drive the cutting unit (4) to move synchronously back and forth in the conveying direction so that the cutting unit (4) cuts the columnar medicine (5) at the same instantaneous speed as the preset conveying speed.

2. The fixed-length cutting system for columnar pharmaceuticals according to claim 1, characterized in that, The working platform (1) is provided with a first driving member (11); the conveying unit (2) includes a transmission wheel assembly (22) and at least one conveying channel (21), the conveying channel (21) is used to place the columnar medicine (5), the first driving member (11) is drivenly connected to the transmission wheel assembly (22), the transmission wheel assembly (22) is used to contact the columnar medicine (5) to drive the columnar medicine (5) to move.

3. The fixed-length cutting system for columnar pharmaceuticals according to claim 2, characterized in that, The conveying unit (2) further includes a shock-absorbing component (23), which includes a mounting component (230) and multiple pressure rollers (231). The mounting component (230) is located on both sides of the conveying channel (21). The mounting component (230) is provided with multiple mounting parts, which are upwardly protruding structures. The pressure rollers (231) are rotatably connected to the mounting parts and are supported above the conveying channel (21).

4. The fixed-length cutting system for columnar pharmaceuticals according to claim 1, characterized in that, The working platform (1) is also provided with a second driving component (12); the following unit (3) includes a transmission rod (31) and a support platform (32), the support platform (32) is movably connected to the working platform (1), and the cutting unit (4) is located on the support platform (32); The transmission rod (31) is arranged parallel to the conveying direction. The second driving member (12) is connected to one end of the transmission rod (31). The transmission rod (31) is also connected to the support platform (32). The second driving member (12) can drive the transmission rod (31) to move axially, so as to drive the support platform (32) and the cutting unit (4) to move back and forth along the conveying direction.

5. The fixed-length cutting system for columnar pharmaceuticals according to claim 4, characterized in that, The following unit (3) also includes an elastic sealing tube (33), which is sleeved on the transmission rod (31).

6. The fixed-length cutting system for columnar pharmaceuticals according to claim 4, characterized in that, The cutting unit (4) includes a third drive (41), a transmission gear assembly (42), a grooved cam (43), a cutting channel (44), and at least one blade assembly (45). The cutting channel (44) is located downstream of the delivery channel (21) and is used for the passage of the columnar agent (5). The output end of the third driving component (41) is connected to the transmission gear assembly (42) for transmission. The grooved cam (43) is connected to the transmission gear assembly (42) and rotates synchronously. The grooved cam (43) is rotatably sleeved on the cutting channel (44). The blade assembly (45) is provided with a cam follower (450), and the inner edge of the end face of the grooved cam (43) can contact at least one of the cam follower (450) during rotation, for driving the at least one blade assembly (45) to move to cut the columnar drug (5).

7. The fixed-length cutting system for columnar pharmaceuticals according to claim 6, characterized in that, The cutting unit (4) further includes a first mounting plate (46) and a second mounting plate (47), the first mounting plate (46) and the second mounting plate (47) are respectively connected to the support platform (32), the grooved cam (43) is rotatably connected to the first mounting plate (46); the second mounting plate (47) is provided with at least one cutting guide (470), and the blade assembly (45) is slidably connected to the cutting guide (470).

8. The fixed-length cutting system for columnar pharmaceuticals according to claim 6, characterized in that, The blade assembly (45) includes a cutting blade (451), a connector (452), and at least one positioning member (453). The tip of the cutting blade (451) is positioned toward the center of the cutting channel (44) on a plane perpendicular to the conveying direction. The cutting blade (451) is inserted into the gap of the connector (452). The connector (452) has at least one first positioning hole, and the cutting blade (451) has at least one second positioning hole. The cutting blade (451) and the connector (452) are fixedly connected through each of the positioning elements (453), each of the first positioning holes and each of the second positioning holes.

9. The fixed-length cutting system for columnar pharmaceuticals according to any one of claims 1-8, characterized in that, The fixed-length cutting system for columnar pharmaceuticals further includes a control unit, the control unit comprising: The length determination module is used to integrate the preset conveying speed and duration of the conveying unit (2) to obtain the length information of the columnar medicine (5); the length information is used to indicate the conveying length of the columnar medicine (5) through the cutting unit (4); The drive module is used to control the following unit (3) to move downstream in the conveying direction at an instantaneous speed equal to the preset conveying speed when the conveying length reaches the preset length, and to control the cutting unit (4) to cut the columnar medicine (5).

10. The fixed-length cutting system for columnar pharmaceuticals according to any one of claims 1-8, characterized in that, The fixed-length cutting system for columnar pharmaceuticals also includes multiple sealed housings (6), and the first drive member (11), the second drive member (12) on the working platform (1) and the third drive member (41) of the cutting unit (4) are respectively sealed in each of the sealed housings (6).

Images