A servo tracking pipette fixed length pneumatic cutting device

Abstract

The utility model discloses a kind of servo tracking straw fixed-length pneumatic cutting device, including straw traction assembly, servo module assembly, opposite pneumatic cutting assembly, control unit and rack. Straw traction assembly drags straw along linear movement, servo module assembly is driven opposite pneumatic cutting assembly and straw synchronous tracking by servo motor and synchronous belt sliding table module. Opposite pneumatic cutting assembly uses the relative cutter of pneumatic drive, in combination with straw guide plate, ensure cutting accuracy. Control unit coordinates traction, tracking and cutting action, and realizes fixed-length control by length detection sensor. Compared with traditional rotary fly cutter, the device reduces tool wear by opposite cutting, prolongs service life, and the cut is flat, especially suitable for thicker straw, with high precision and economy.

Description

Technical Field

[0001] This utility model relates to the field of straw cutting technology, specifically a servo-tracking straw fixed-length pneumatic cutting device. Background Technology

[0002] In the straw production process, fixed-length cutting is a crucial step to ensure consistent straw length. Current technology typically employs a rotary cutter device for fixed-length straw cutting, where the high-speed rotation of the cutter cuts the formed straw. While this method is efficient for processing standard, narrow-diameter straws, it has significant drawbacks for thicker straws. Because thicker straws are made of thicker, more resilient material, the rotary cutter experiences greater cutting resistance during the cutting process, leading to accelerated tool wear and a significantly shortened lifespan.

[0003] To extend tool life, existing technologies attempt to mitigate wear by improving tool materials or optimizing the rotational speed of the rotary cutter, but with limited effectiveness. Frequent tool replacements not only increase production costs but also reduce production efficiency due to downtime for maintenance. Furthermore, when cutting thicker straws, the rotary cutter struggles to guarantee cut quality, easily producing burrs or uneven surfaces, affecting straw quality and subsequent use. Therefore, a new cutting device is urgently needed that can effectively extend tool life while ensuring cutting accuracy and efficiency, adapting to the fixed-length cutting requirements of thicker straws. Utility Model Content

[0004] The purpose of this invention is to provide a servo-tracking pneumatic cutting device for a fixed-length suction tube. By adopting a combination design of a suction tube traction component, a servo module component, and a counter-pneumatic cutting component, it significantly solves the problem of short tool life when the rotating flying knife cuts a thicker suction tube in the prior art.

[0005] To achieve the above objectives, the present invention proposes the following technical solution: a servo-tracking straw fixed-length pneumatic cutting device, comprising a straw traction assembly, a servo module assembly, and a counter-pneumatic cutting assembly;

[0006] The straw traction assembly is used to traction the shaped straw to move along a predetermined direction;

[0007] The servo module assembly is connected to the opposing pneumatic cutting assembly and is used to drive the opposing pneumatic cutting assembly to move along the suction tube;

[0008] The opposing pneumatic cutting assembly includes at least a pair of oppositely arranged cutters, which can move relative to each other in a direction of mutual approach under pneumatic drive in order to cut the straw to a fixed length.

[0009] The servo module component controls the opposing pneumatic cutting component to perform a cutting action when the suction tube moves to a predetermined length.

[0010] Preferably, the servo module assembly includes a servo motor, a synchronous belt slide module, and a moving platform. The output end of the servo motor is connected to and drives the synchronous belt slide module. The moving platform is fixedly connected to the slider of the synchronous belt slide module and is slidably mounted on the synchronous belt slide module.

[0011] The opposing pneumatic cutting assembly is mounted on the mobile platform. The servo motor drives the synchronous belt slide module to move the mobile platform along the synchronous belt slide module, so as to achieve synchronous tracking between the opposing pneumatic cutting assembly and the suction tube.

[0012] Preferably, the straw traction assembly includes a traction roller group and a drive motor. The traction roller group includes at least one pair of traction rollers arranged opposite each other. The drive motor is connected to the traction roller group and is used to drive the traction rollers to rotate in order to traction the straw to move.

[0013] Preferably, the opposing pneumatic cutting assembly includes a cylinder group and a cutter group. The cylinder group includes at least two cylinders arranged opposite each other, each cylinder is connected to a cutter, and the cylinder drives the cutter to move in the opposite direction to complete the cutting.

[0014] Preferably, the cutter is semi-circular, and the cutting direction of the blade is perpendicular to the moving direction of the straw.

[0015] Preferably, the opposing pneumatic cutting assembly further includes two suction guide plates, which are fixedly connected to the moving platform. The suction guide plates have through holes through which the suction tubes pass. The cylinder assembly and the cutter assembly are located between the two suction guide plates.

[0016] Preferably, it also includes a control unit, which is electrically connected to the straw traction assembly, the servo module assembly and the opposing pneumatic cutting assembly, for coordinating the traction speed of the straw traction assembly, the moving speed of the servo module assembly and the cutting timing of the opposing pneumatic cutting assembly.

[0017] Preferably, the control unit includes a length detection sensor, which is used to detect the moving length of the straw and send the detection signal to the control unit to trigger the opposing pneumatic cutting assembly to perform a cutting action.

[0018] Preferably, the cutter of the opposing pneumatic cutting assembly is made of wear-resistant material to extend its service life.

[0019] Preferably, it also includes a frame, on which the suction tube traction assembly, the servo module assembly and the opposing pneumatic cutting assembly are all mounted.

[0020] Beneficial effects: The technical solution of this application has the following technical effects:

[0021] This invention provides a servo-tracking pneumatic cutting device for straws of fixed length. Utilizing at least one pair of opposing cutters, it achieves relative motion cutting via pneumatic drive. Compared to the unidirectional high-speed cutting of rotating blades, this opposing cutting method results in more even force distribution on the cutters, reducing blade wear and significantly extending their service life. Furthermore, the servo module drives the opposing pneumatic cutting component to synchronously track the straw's movement direction, ensuring precise cutting when the straw reaches the predetermined length. This servo tracking mechanism not only improves the fixed-length cutting accuracy but also avoids the uneven cut caused by the high-speed rotation of rotating blades, making it particularly suitable for cutting thicker straws. The improved cut smoothness and consistency further enhance the quality of the straws, meeting the production requirements for high-quality straws. Through the above design, this invention reduces the frequency of blade replacement and maintenance costs while maintaining high-efficiency production, demonstrating significant economic benefits and practicality. The device has a simple structure, is easy to integrate into existing straw production lines, and is suitable for fixed-length cutting of various straw specifications, exhibiting excellent performance, especially when processing thicker straws.

[0022] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below can be considered as part of the utility model subject matter of this disclosure, provided that such concepts do not contradict each other.

[0023] The foregoing and other aspects, embodiments, and features of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as features and / or beneficial effects of exemplary embodiments, will become apparent from the following description or may be learned through practice of specific embodiments according to the teachings of the present invention. Attached Figure Description

[0024] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a partial structural diagram of the present invention;

[0027] Figure 3 This is a top view of the present invention;

[0028] Figure 4 This is a partial structural diagram of the present invention;

[0029] The meanings of the labels in the figures are as follows: 1. Suction tube traction assembly; 2. Servo module assembly; 3. Opposing pneumatic cutting assembly; 4. Frame; 5. Suction tube; 101. Traction roller assembly; 201. Servo motor; 202. Synchronous belt slide module; 203. Moving platform; 204. Suction tube guide plate; 301. Cylinder; 302. Cutter. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below with reference to the accompanying drawings to clearly illustrate the structure, purpose, advantages, positional relationship, and connection method of each component. It should be noted that the directional indicators (such as "front," "rear," "up," and "down") involved in this embodiment are based on the posture shown in the drawings and are only used to describe the relative positional relationship and movement of the components. If the posture changes, the directional indicators will be adjusted accordingly. The term "connection" includes mechanical connections and electrical connections, and can be fixed connections, detachable connections, or indirect connections through an intermediate medium. The specific meaning is understood by those skilled in the art based on the context.

[0031] For thicker straws, the rotary cutter method has significant drawbacks. Because thicker straws are made of thicker, more resilient material, the rotary cutter must withstand greater cutting resistance during the cutting process, leading to accelerated tool wear and a significantly shortened tool life. Therefore, as... Figure 1-4 As shown, this embodiment provides a servo-tracking pneumatic cutting device for fixed-length straw cutting, which is used to cut shaped straws to a fixed length. It is particularly suitable for cutting thicker straws, thus solving the problems of short blade life and poor cut quality of existing rotary flying knives. The device includes a straw traction assembly 1, a servo module assembly 2, a counter-rotating pneumatic cutting assembly 3, a control unit, and a frame 4. The frame 4 provides overall support for the device and is welded from Q235 steel with a rust-proof paint coating.

[0032] The straw traction assembly 1 is used to stably move the formed straw 5 in a straight line. It includes a traction roller group 101 and a drive motor. The traction roller group 101 consists of multiple sets of opposing rubber traction rollers with anti-slip textures on the roller surface to increase friction with the straw 5 and ensure stable traction. The drive motor is a servo motor, connected to the traction roller group 101 through a reducer, driving the traction rollers to rotate. The traction assembly 1 can provide a constant traction speed, suitable for straws of different diameters, especially thicker straws, avoiding slippage or jamming. The straw traction assembly 1 is fixed to the top of the frame 4, and the straw 5 passes through the gaps between the traction roller groups 101 to enter the subsequent cutting process.

[0033] The servo module assembly 2 is used to drive the opposing pneumatic cutting assembly 3 to synchronously track along the axis of the suction tube 5, ensuring precise cutting position. It includes a servo motor 201, a synchronous belt slide module 202, and a moving platform 203. The output end of the servo motor 201 is connected to and drives the synchronous belt slide module 202. The moving platform 203 is fixedly connected to the slider of the synchronous belt slide module 202 and is slidably mounted on the synchronous belt slide module 202. The synchronous belt slide module 202 provides high-precision transmission, ensuring smooth movement of the moving platform 203 and minimal tracking error. The servo module assembly 2 is located at the end of the suction tube traction assembly 1, and the opposing pneumatic cutting assembly 3 is mounted on the upper surface of the moving platform 203 to achieve synchronous tracking.

[0034] The opposing pneumatic cutting assembly 3 is used to cut the straw 5 to a fixed length. It includes a cylinder assembly, a cutter assembly, and two straw guide plates 204. The cylinder assembly consists of two opposing cylinders 301, model SMC CDQ2B32-50DZ. The piston rod of each cylinder 301 is connected to a semi-circular cutter 302. The cutter 302 is made of wear-resistant high-speed steel (HSS), and the cutting direction of the blade is perpendicular to the straw's movement direction to ensure a clean cut. The two straw guide plates 204 are fixed to the moving platform 203 and located on both sides of the cylinder assembly and the cutter assembly. Each straw guide plate 204 has a through hole through which the straw passes to maintain stability. The cylinder assembly and the cutter assembly are located between the two straw guide plates 204, and the cylinders 301 are connected to an external air source via pneumatic pipelines. The opposing cutting method ensures even force distribution on the cutter, reducing wear compared to rotating fly knives and extending tool life to 2-3 times that of traditional fly knives, while producing burr-free cuts. The suction tube guide plate 204 limits suction tube vibration, further improving cutting accuracy. (Control unit structure and function)

[0035] The control unit coordinates the actions of each component to ensure the accuracy and synchronization of the cutting length. Its main hardware includes a PLC, a touchscreen, and a length detection sensor. The PLC is a Siemens S7-1200, the length detection sensor is a KEYENCE IL-1000, and the touchscreen is a Weitek MT8071iE. The PLC is electrically connected via I / O modules to the drive motor of the suction traction assembly 1, the servo motor 201 of the servo module assembly 2, and the cylinder 301 of the opposing pneumatic cutting assembly 3. The length detection sensor is mounted on the suction guide plate 204 and detects the moving length of the suction tube with high accuracy using laser ranging. The touchscreen is used to set the suction tube length parameters and display the operating status. The advantages of the control unit are that it enables automated control, fast and reliable signal transmission, and ensures coordinated traction, tracking, and cutting actions.

[0036] The working principle is as follows: First, the required straw length parameter is set, and the PLC initializes the system according to the parameter. The drive motor of the straw traction component 1 starts, driving the guide roller group 101 to rotate, and pulling the formed straw 5 to move linearly along the straw guide plate 204. The length detection sensor monitors the moving length of the straw in real time and transmits the data to the PLC through the RS-485 interface. When the straw 5 moves to the predetermined length, the PLC sends a pulse signal to the servo motor 201 of the servo module component 2. The servo motor 201 drives the moving platform 203 to move along the synchronous belt slide module 202 through the synchronous belt slide module 202, so that the opposing pneumatic cutting component 3 and the straw 5 track synchronously. At the same time, the PLC triggers the solenoid valve, driving the cylinder 301 to move, so that the two semi-circular cutters 302 move relative to each other between the straw guide plate 204, completing the fixed-length cutting of the straw 5. After the cutting is completed, the cutter 302 resets and waits for the next cutting command. The entire process is coordinated and controlled by a PLC to ensure precise synchronization of traction, tracking and cutting actions, resulting in a clean cut, which is especially suitable for cutting thicker straws.

[0037] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, this application will not explain the control method and circuit connection in detail.

[0038] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A servo-tracked pipette fixed-length pneumatic cutting device, characterized by, It includes a straw traction assembly (1), a servo module assembly (2), and a counter-pneumatic cutting assembly (3). The straw traction assembly (1) is used to traction the shaped straw to move along a predetermined direction; The servo module component (2) is connected to the opposing pneumatic cutting component (3) and is used to drive the opposing pneumatic cutting component (3) to move along the suction tube; The opposing pneumatic cutting assembly (3) includes at least a pair of oppositely arranged cutters (302), which are capable of moving relative to each other in a direction of mutual approach under pneumatic drive in order to cut the straw to a fixed length; The servo module component (2) controls the opposing pneumatic cutting component (3) to perform a cutting action when the suction tube moves to a predetermined length.

2. The servo-tracked pipette fixed-length pneumatic cutting device of claim 1, wherein, The servo module assembly (2) includes a servo motor (201), a synchronous belt slide module (202), and a moving platform (203). The output end of the servo motor (201) is connected to and drives the synchronous belt slide module (202). The moving platform (203) is fixedly connected to the slider of the synchronous belt slide module (202). The moving platform (203) is slidably mounted on the synchronous belt slide module (202). The opposing pneumatic cutting assembly (3) is mounted on the mobile platform (203). The servo motor (201) drives the synchronous belt slide module (202) to move the mobile platform (203) along the synchronous belt slide module (202) so as to realize the synchronous tracking of the opposing pneumatic cutting assembly (3) and the suction tube.

3. The servo-tracked pipette fixed-length pneumatic cutting device of claim 1 or 2, wherein, The straw traction assembly (1) includes a traction roller group (101) and a drive motor. The traction roller group (101) includes at least one pair of traction rollers arranged opposite each other. The drive motor is connected to the traction roller group (101) and is used to drive the traction rollers to rotate in order to move the straw.

4. The servo-tracking suction tube fixed-length pneumatic cutting device according to claim 2, characterized in that, The opposing pneumatic cutting assembly (3) includes a cylinder group and a cutting blade group. The cylinder group includes at least two cylinders (301) arranged opposite each other. Each cylinder (301) is connected to a cutting blade (302). The cylinder (301) drives the cutting blade (302) to move in opposite directions to complete the cutting.

5. The servo-tracking suction tube fixed-length pneumatic cutting device according to claim 4, characterized in that, The cutter (302) is semi-circular, and the cutting direction of the blade is perpendicular to the moving direction of the straw.

6. The servo-tracking suction tube fixed-length pneumatic cutting device according to claim 4, characterized in that, The opposing pneumatic cutting assembly (3) also includes two suction guide plates (204), which are fixedly connected to the moving platform (203). The suction guide plates (204) have through holes through which the suction tube passes. The cylinder (301) group and the cutter (302) group are located between the two suction guide plates (204).

7. The servo-tracking suction tube fixed-length pneumatic cutting device according to claim 1, characterized in that, It also includes a control unit, which is electrically connected to the straw traction assembly (1), the servo module assembly (2) and the opposing pneumatic cutting assembly (3), and is used to coordinate the traction speed of the straw traction assembly (1), the moving speed of the servo module assembly (2) and the cutting timing of the opposing pneumatic cutting assembly (3).

8. The servo-tracking suction tube fixed-length pneumatic cutting device according to claim 7, characterized in that, The control unit includes a length detection sensor, which is used to detect the moving length of the straw and send the detection signal to the control unit to trigger the opposing pneumatic cutting assembly (3) to perform a cutting action.

9. The servo-tracking suction tube fixed-length pneumatic cutting device according to claim 4, characterized in that, The cutter (302) of the opposing pneumatic cutting assembly (3) is made of wear-resistant material to extend its service life.

10. The servo-tracked pipette fixed-length pneumatic cutting device of claim 1, wherein, It also includes a frame (4), on which the suction traction assembly (1), the servo module assembly (2) and the opposing pneumatic cutting assembly (3) are all mounted.

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