A plastic pipe cutting device

Abstract

This utility model discloses a plastic tube cutting device, including a feeding assembly, a cutting assembly, and a positioning assembly. The feeding assembly is used to feed the plastic tube; the cutting assembly is used to cut the plastic tube; the positioning assembly includes a limiting baffle, a rotating shaft, a driven turntable, a driving cam, and a driving component. A first protrusion and a second protrusion are fixed on the driven turntable. The driving component drives the driving cam to rotate smoothly. The driving cam alternately engages with the first and second protrusions to drive the rotating shaft to rotate intermittently by 180°. The limiting baffle is fixed to the rotating shaft, and the reference position of the limiting baffle is perpendicular to the feeding direction of the feeding assembly. The technical solution of this utility model aims to achieve continuous and uninterrupted feeding and cutting of plastic tubes.

Description

Technical Field

[0001] This utility model relates to the field of cutting device technology, and in particular to a plastic pipe cutting device. Background Technology

[0002] Plastic pipes are widely used in production and daily life, and they often need to be cut to specific lengths. A plastic pipe cutting device is an automated machine used to cut continuous lengths of plastic hoses to a fixed length. Its core requirement is reliable continuous production. For flexible pipes, deformation easily occurs during cutting, and if the cut pipe segments cannot be removed from the workstation in time, they are prone to accumulation and tangling in the cutting area, leading to production interruptions, poor cut quality, or even equipment failure. Therefore, achieving efficient, continuous, and uninterrupted automated cutting is key to improving both production capacity and quality.

[0003] Existing plastic pipe cutting devices often use fixed limit blocks for positioning. That is, after the hose is fed to the block, the cutting component cuts it. After each cut, the equipment must pause feeding and wait for the robotic arm or air blower to remove the cut pipe section before the next feeding and cutting can be carried out. This makes it impossible to achieve truly continuous operation. Utility Model Content

[0004] The purpose of this invention is to provide a plastic pipe cutting device that enables continuous and uninterrupted feeding and cutting of plastic pipes.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A plastic pipe cutting device includes a feeding assembly, a cutting assembly, and a positioning assembly; the feeding assembly is used to feed the plastic pipe; the cutting assembly is used to cut the plastic pipe.

[0007] The positioning component includes a limiting baffle, a rotating shaft, a driven turntable, an active cam, and a driving component. The driven turntable has a first protrusion and a second protrusion fixed on it. The driving component is used to drive the active cam to rotate smoothly. The active cam alternately cooperates with the first protrusion and the second protrusion to drive the rotating shaft to rotate intermittently by 180°. The limiting baffle is fixed to the rotating shaft, and the reference position of the limiting baffle is perpendicular to the feeding direction of the feeding component.

[0008] In one embodiment, the active cam is an external helical cylindrical cam.

[0009] In one embodiment, the feeding assembly includes a first feeding roller, a second feeding roller, a third feeding roller, a fourth feeding roller, and a guide trough;

[0010] The first feeding roller and the second feeding roller are respectively disposed on both sides of the guide groove and are located close to the cutting assembly; the third feeding roller and the fourth feeding roller are respectively disposed on both sides of the guide groove and are located close to the positioning assembly.

[0011] The first and third feed rollers are synchronously driven by a first belt; the second and fourth feed rollers are synchronously driven by a second belt, and the first and second belts are driven in opposite directions.

[0012] In one embodiment, the feeding assembly further includes a guide plate located between the cutting assembly and the third feeding roller, and disposed on both sides of the guide groove.

[0013] In one embodiment, the distance between the first feed roller and the second feed roller is less than the distance between the third feed roller and the fourth feed roller.

[0014] In one embodiment, the device further includes a frame, a limiting element is provided on the side edge of the limiting baffle, the frame is provided with a photoelectric switch, the photoelectric switch is signal-connected to the cutting assembly, and the limiting element triggers the photoelectric switch during the rotation of the limiting baffle.

[0015] In one embodiment, the cutting assembly includes a first support, a blade holder, a second support, and a cylinder; the first support is fixed to the frame and hinged to the blade holder, the second support is fixed to the frame and hinged to the cylinder, the drive end of the cylinder is hinged to the blade holder, and when the cylinder is driven, the blade holder can cut the plastic tube.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model effectively solves the downtime problem caused by poor material feeding in the background technology, thereby achieving efficient and continuous production. Specifically, this technical solution uses the ingenious cooperation of the driving component, the active cam, and the double protrusions on the driven turntable to drive the rotating shaft and the fixed limiting baffle to rotate intermittently by 180°. In the first station, the limiting baffle, set on one side, is perpendicular to the feeding direction to block the tube end and ensure a fixed length; in the second station, it deviates from the feeding channel to make room, realizing the intermittent switching of the limiting baffle between the two stations. This allows time for the feeding component to feed the material. This solution allows the limiting baffle to complete one station cycle every two rotations (i.e., one complete cycle). The first rotation ensures that the plastic tube with the blocked end and fixed length is smoothly passed under the drive of the feeding component. The second rotation prepares for the blocked end and provides a new positioning reference for the subsequent plastic tube, thereby achieving seamless connection between cutting, feeding, and re-feeding positioning. This fundamentally avoids the accumulation of plastic tubes at the cutting station and ensures the continuity and high efficiency of production. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the plastic pipe cutting device of this utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the AA cross-section structure in the diagram;

[0022] Figure 3 for Figure 2 Enlarged view of part B in the image;

[0023] Figure 4 Figure 1 Another structural diagram from the center;

[0024] Figure 5 for Figure 1 Top view in the middle;

[0025] Illustration: 100, Plastic pipe cutting device; 110, Feeding assembly; 111, First feeding roller; 112, Second feeding roller; 113, Third feeding roller; 114, Fourth feeding roller; 115, Guide chute; 116, Guide plate; 120, Cutting assembly; 121, First support; 122, Tool holder; 123, Second support; 124, Cylinder; 130, Positioning assembly; 131, Limiting baffle; 131a, Limiting element; 132, Rotating shaft; 133, Driven turntable; 133a, First protrusion; 133b, Second protrusion; 134, Active cam; 135, Driving element; 140, Frame; 141, Photoelectric switch. Detailed Implementation

[0026] To make the technical objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] This utility model embodiment provides a plastic pipe cutting device 100.

[0030] Please see Figures 1 to 5 The plastic pipe cutting device 100 includes a feeding assembly 110, a cutting assembly 120, and a positioning assembly 130; the feeding assembly 110 is used for feeding the plastic pipe; the cutting assembly 120 is used for cutting the plastic pipe.

[0031] The positioning component 130 includes a limiting baffle 131, a rotating shaft 132, a driven turntable 133, an active cam 134, and a driving member 135. The driven turntable 133 is fixed with a first protrusion 133a and a second protrusion 133b. The driving member 135 is used to drive the active cam 134 to rotate smoothly. The active cam 134 alternately cooperates with the first protrusion 133a and the second protrusion 133b to drive the rotating shaft 132 to rotate intermittently by 180°. The limiting baffle 131 is fixed to the rotating shaft 132. The reference position of the limiting baffle 131 is perpendicular to the feeding direction of the feeding component 110.

[0032] It is understood that this embodiment can effectively solve the downtime problem caused by poor material feeding in the background art, thereby achieving efficient and continuous production. Specifically, this technical solution utilizes the ingenious cooperation of the driving component 135, the active cam 134, and the double protrusions on the driven turntable 133 to drive the rotating shaft 132 and the fixed limiting baffle 131 to rotate intermittently by 180°. This allows the limiting baffle 131, which is set on one side, to block the tube end and ensure a fixed length in the first station, perpendicular to the feeding direction; and in the second station, it deviates from the feeding channel to make room. This intermittent switching of the limiting baffle 131 between the two stations allows time for the feeding assembly 110 to feed the tube. This solution allows the limiting baffle 131 to complete one station cycle every two rotations (i.e., one complete cycle). The first rotation ensures that the plastic tube with the blocked end and fixed length is smoothly passed under the drive of the feeding assembly 110. The second rotation prepares for the blocked end and provides a new positioning reference for the subsequent plastic tube. This achieves seamless connection between cutting, unloading, and re-feeding positioning, fundamentally avoiding the accumulation of plastic tubes at the cutting station and ensuring the continuity and high efficiency of production.

[0033] Specifically, the feeding assembly 110 is the mechanism in the device responsible for continuously and stably conveying the continuous plastic tubes to the designated cutting position. Its specific implementation is not limited to one particular method; for example, it can be based on one or more pairs of counter-rotating rollers using frictional force, or it can be based on pushers on chains or belts for step-by-step feeding, or it can utilize hydraulically or pneumatically driven clamps for clamping and feeding. Its core function is to achieve automated feeding of the plastic tubes.

[0034] Please see Figure 1In one specific embodiment, the feeding assembly 110 includes a first feeding roller 111, a second feeding roller 112, a third feeding roller 113, a fourth feeding roller 114, and a guide trough 115; the first feeding roller 111 and the second feeding roller 112 are respectively disposed on both sides of the guide trough 115 and are located close to the cutting assembly 120; the third feeding roller 113 and the fourth feeding roller 114 are respectively disposed on both sides of the guide trough and are located close to the positioning assembly 130; the first feeding roller 111 and the third feeding roller 113 are synchronously driven by a first belt; the second feeding roller 112 and the fourth feeding roller 114 are synchronously driven by a second belt, and the transmission directions of the first belt and the second belt are opposite.

[0035] Understandably, the first feeding roller 111 and the second feeding roller 112, located close to the cutting assembly 120, provide a stable and directional clamping force for the plastic tube, effectively preventing the plastic tube from slipping during the cutting process. The third feeding roller 113 and the fourth feeding roller 114 ensure the accuracy of the feeding length, laying a solid foundation for the subsequent positioning of the plastic tube.

[0036] It is also understood that the feeding assembly 110 can ensure that the plastic tube can perform position compensation by slipping with the feeding roller when it is in contact with the limiting baffle 131, thereby improving the robustness and adaptability of the device.

[0037] Furthermore, the first belt and the second belt are driven by drive motors respectively.

[0038] Furthermore, the feeding assembly 110 also includes a guide plate 116, which is located between the cutting assembly 120 and the third feeding roller 113, and is disposed on both sides of the guide groove.

[0039] Understandably, by adding symmetrically arranged guide plates 116 near the feeding end of the positioning component 130, a stable guiding channel is formed together with the guide groove 115. This effectively eliminates the lateral swaying, warping, or deviation that may occur in the plastic tube (especially the flexible hose) during the distance from when it is cut off or released from the clamping of the first feeding roller 111 and the second feeding roller 112 until it contacts the third feeding roller 113 and the fourth feeding roller 114. This improves the displacement accuracy of the feeding terminal, provides a guarantee for subsequent fixed-length cutting, and further enhances the reliability and stability of the system's continuous operation.

[0040] Optionally, the distance between the first feeding roller 111 and the second feeding roller 112 is smaller than the distance between the third feeding roller 113 and the fourth feeding roller 114. It is understood that the arrangement of the first feeding roller 111 and the second feeding roller 112 enhances the local fixing force on the pipe during cutting, effectively preventing the pipe from retracting, vibrating, or deforming due to cutting impact, thereby ensuring a neat, vertical, and dimensionally accurate cut. Simultaneously, the larger distance between the third feeding roller 113 and the fourth feeding roller 114 reduces pressure on the pipe, decreases feeding resistance, and facilitates accuracy compensation during the feeding process, making the entire feeding process smoother and more stable.

[0041] Please see Figure 4 and Figure 5 In a specific embodiment of this utility model, the plastic pipe cutting device 100 further includes a frame 140, a limiting member 131a is provided on the side edge of the limiting baffle 131, the frame 140 is provided with a photoelectric switch 141, the photoelectric switch 141 is signal connected to the cutting assembly 120, and during the rotation of the limiting baffle 131, the limiting member 131a triggers the photoelectric switch 141.

[0042] It is understandable that the combination of the limit switch 131a and the photoelectric switch 141 provides a reliable and accurate position feedback mechanism. This allows the photoelectric switch 141 to detect in real time whether the limit switch 131 has been accurately rotated to the preset working position, and ensures that the cutting action is triggered at the exact moment after positioning is completed through signal connection. This avoids accidental cutting that may occur due to mechanical transmission errors or timing disorders, and greatly improves the automation, reliability and safety of the entire system.

[0043] Please see Figure 1 In a specific embodiment, the cutting assembly 120 includes a first support 121, a blade holder 122, a second support 123, and a cylinder 124.

[0044] The first support 121 is fixed to the frame 140 and hinged to the tool holder 122. The second support 123 is fixed to the frame 140 and hinged to the cylinder 124. The driving end of the cylinder 124 is hinged to the tool holder 122. When the cylinder 124 is driven, the tool holder 122 can cut the plastic tube.

[0045] It is understood that this embodiment, by using a cylinder 124 as a power source and in conjunction with a multi-hinged linkage-type tool holder 122 structure, provides the cutting assembly 120 with a cutting solution that features high impact force, fast response speed, simple structure, and convenient maintenance.

[0046] Specifically, the cylinder 124 ensures rapid and powerful action, quickly overcoming the resistance of the plastic tube to complete the cut. This structure is particularly suitable for automated cutting applications requiring high-frequency, high-reliability execution. The cylinder 124, combined with the photoelectric switch 141 mentioned above, enables precise timing control, ensuring that the cutting action starts only momentarily after the tube is positioned, thus perfectly integrating into the entire production cycle.

[0047] Optionally, the cutting assembly 120 may be a high-speed rotating disc cutter, a reciprocating bow saw, or a straight cutter; its driving method may also be electric, pneumatic, or hydraulic.

[0048] Optionally, when the plastic tube is pushed by the feeding assembly 110 and its end contacts the limiting baffle 131, it indicates that it has been delivered to the position required for the predetermined cutting length. Its specific shape can be flat or other structures that can provide a reliable blocking surface; the limiting baffle 131 is fixed to the rotating shaft 132 and rotates synchronously therewith.

[0049] Specifically, in this technical solution, the reference position refers to the position it is in when it blocks the end of the tube at the first working position. This position is perpendicular to the feeding direction to ensure the effectiveness of the blocking surface.

[0050] Specifically, in this technical embodiment, the driven turntable 133 is a disc-shaped part used to receive power from the driving cam 134 and realize intermittent motion. A first protrusion 133a and a second protrusion 133b, arranged radially along the turntable, are fixed on it. These two protrusions are key to realizing intermittent motion. Their specific forms can be pins, rollers, sliders, or machined bosses, and their materials should have high wear resistance. They are typically arranged symmetrically about the center of the turntable to ensure that each push produces a 180° rotation. The driving cam 134 is directly driven by the drive member 135, and its external helical characteristic refers to its working profile being a groove or flange with specific lift and return strokes surrounding the outer surface of the cylinder. Its cylindrical cam shape allows it to smoothly transmit motion. It converts continuous rotational motion into intermittent rotation by sequentially and alternately meshing or contacting the first protrusion 133a and the second protrusion 133b on the driven turntable 133.

[0051] Optionally, the drive unit 135 for driving the active cam 134 can be a combination of a servo motor, a stepper motor, a conventional motor, and a reducer. Its function is to drive the active cam 134 to perform smooth and continuous rotary motion.

[0052] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A plastic pipe cutting device, characterized by, It includes a feeding assembly, a cutting assembly, and a positioning assembly; the feeding assembly is used to feed the plastic tube; the cutting assembly is used to cut the plastic tube. The positioning component includes a limiting baffle, a rotating shaft, a driven turntable, an active cam, and a driving component. The driven turntable has a first protrusion and a second protrusion fixed on it. The driving component is used to drive the active cam to rotate smoothly. The active cam alternately cooperates with the first protrusion and the second protrusion to drive the rotating shaft to rotate intermittently by 180°. The limiting baffle is fixed to the rotating shaft, and the reference position of the limiting baffle is perpendicular to the feeding direction of the feeding component.

2. The plastic pipe cutting device of claim 1, wherein, The active cam is an external helical cylindrical cam.

3. The plastic tube cutting apparatus of claim 2, wherein The feeding assembly includes a first feeding roller, a second feeding roller, a third feeding roller, a fourth feeding roller, and a guide trough; The first feeding roller and the second feeding roller are respectively disposed on both sides of the guide groove and are located close to the cutting assembly; the third feeding roller and the fourth feeding roller are respectively disposed on both sides of the guide groove and are located close to the positioning assembly. The first and third feed rollers are synchronously driven by a first belt; the second and fourth feed rollers are synchronously driven by a second belt, and the first and second belts are driven in opposite directions.

4. The plastic tube cutting apparatus of claim 3, wherein The feeding assembly also includes a guide plate, which is located between the cutting assembly and the third feeding roller, and is disposed on both sides of the guide groove.

5. The plastic tube cutting apparatus of claim 4, wherein The distance between the first feed roller and the second feed roller is less than the distance between the third feed roller and the fourth feed roller.

6. The plastic tube cutting apparatus of claim 4, wherein It also includes a frame, with a limiting element provided on the side edge of the limiting baffle, and a photoelectric switch provided on the frame. The photoelectric switch is signal-connected to the cutting assembly. During the rotation of the limiting baffle, the limiting element triggers the photoelectric switch.

7. The plastic tube cutting apparatus of claim 6, wherein The cutting assembly includes a first support, a blade holder, a second support, and a cylinder; The first support is fixed to the frame and hinged to the tool holder, the second support is fixed to the frame and hinged to the cylinder, the drive end of the cylinder is hinged to the tool holder, and when the cylinder is driven, the tool holder can cut the plastic tube.

Images