PET plastic steel packing belt tension adjusting mechanism

Abstract

The utility model provides a kind of PET plastic steel packing belt tension adjusting mechanism, it is related to the field of winding machine.The tension adjusting mechanism is applied to winding machine, winding machine includes processing platform and is set on processing platform and is provided with winding unit, and tension adjusting mechanism includes: traction unit, including several traction matched traction roller, and any traction roller rotatably set on processing platform;Wherein, the traction roller of traction unit inlet end and discharge end is all transmission connection with first driving motor;Pressure regulating structure, including mounting seat, compression roller, spring and hydraulic telescopic rod, compression roller and winding roller of winding unit extrusion cooperation, and with mounting seat through spring elastic connection, mounting seat can be slidably set on processing platform, hydraulic telescopic rod is set on processing platform, and is connected with mounting seat, for driving mounting seat sliding on processing platform.The tension adjusting structure of the application solves the problem that traditional packing belt is prone to tension control imbalance.

Description

Technical Field

[0001] This utility model relates to the field of winding machine technology, and more specifically, to a tension adjustment mechanism for PET plastic steel strapping. Background Technology

[0002] PET strapping is a high-strength packaging material made from polyethylene terephthalate (PET) through extrusion molding and stretching processes. Compared to traditional steel strapping, it is widely used in logistics, home appliance manufacturing, and building material packaging to securely bundle goods due to its lightweight, flexibility, corrosion resistance, and tensile strength of over 600 MPa.

[0003] As a key post-processing equipment in the production process, the winding machine plays a crucial role in the molding of PET plastic steel strip: after the extruder completes the shaping and stretching, the winding machine pulls the continuous strip to the winding station through the traction roller group. Under the action of the winding roller, the packing tape is wound around the core in a spiral trajectory, finally forming a neatly shaped strip coil.

[0004] However, if the tension of the strapping tape is unbalanced and excessive during the operation of the current winding machine, it will directly affect the quality of the finished product and the performance of the equipment: excessive tension will cause the PET tape to be overly taut on the winding roller, generating concentrated stress inside the tape, especially during the cooling and shrinkage process, which will lead to the inner layer of the tape roll being squeezed and broken or plastically deformed; at the same time, excessive tension will aggravate the mechanical wear of the winding roller and the traction roller, and may even cause transmission system failure; in addition, an overly tight winding state will cause the tape roll hardness to increase sharply, making it easy to break at the edges during handling, and subsequent problems such as tape feeding jamming and tape tearing will occur when the automatic packaging equipment grabs it, seriously affecting packaging efficiency and the safety of goods bundling. Utility Model Content

[0005] The purpose of this utility model is to provide a PET plastic steel strapping tension adjustment mechanism, which aims to solve the technical problems in the background art mentioned above.

[0006] The embodiments of this utility model are implemented as follows:

[0007] This application provides a PET plastic steel strapping tension adjustment mechanism applied to a winding machine. The winding machine includes a processing platform and a winding unit disposed on the processing platform. The tension adjustment mechanism includes: a traction unit comprising a plurality of traction rollers in traction engagement, any one of which is rotatably disposed on the processing platform; wherein the traction rollers at the inlet and outlet ends of the traction unit are both drivenly connected to a first drive motor, the inlet end being used to receive PET plastic steel strapping, and the outlet end being adapted to the winding unit; and a pressure adjustment structure comprising a mounting base, a pressure roller, a spring, and a hydraulic telescopic rod. The pressure roller is in compression engagement with the winding roller of the winding unit and is elastically connected to the mounting base via the spring. The mounting base is slidably disposed on the processing platform, and the hydraulic telescopic rod is disposed on the processing platform and connected to the mounting base, for driving the mounting base to slide on the processing platform.

[0008] Furthermore, based on the aforementioned scheme, the winding roller of the winding unit is driven by a gearbox, and the gearbox is driven by a second drive motor.

[0009] Furthermore, based on the aforementioned scheme, the mounting base includes: a mounting portion slidably disposed on the processing platform; a fixed portion fixedly disposed on the mounting portion; a movable portion slidably disposed on the mounting portion and cooperating with the fixed portion in opposite directions or away from it; a connecting rod, one end of which is connected to the movable portion, and the other end of which passes through the fixed portion and is rotatably connected to the pressure roller; wherein, the spring is sleeved on the connecting rod between the fixed portion and the movable portion, and both ends are respectively connected to the fixed portion and the movable portion.

[0010] Furthermore, based on the aforementioned scheme, the number of guide structures formed by the aforementioned connecting rod and the aforementioned spring is two sets.

[0011] Furthermore, based on the aforementioned scheme, a distance sensor is provided on the side of the fixed part facing the movable part.

[0012] Furthermore, based on the aforementioned scheme, the processing platform is equipped with a guide rod, and the fixing part is slidably connected to the guide rod.

[0013] Furthermore, based on the aforementioned scheme, the processing platform is also provided with a guide groove, which slides in conjunction with the aforementioned fixing part;

[0014] The two ends of the aforementioned fixing part are slidably engaged with the aforementioned guide rod and the aforementioned guide groove, respectively.

[0015] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0016] The tension adjustment mechanism of this application is applied when the tension of the packing strap in the winding machine is too high. This tension adjustment mechanism achieves coordinated adaptation through the differential speed control of dual drive motors and the hydraulic-spring composite pressure adjustment: the first drive motors at the feed end and the discharge end of the traction unit can independently adjust their speeds. By changing the conveying speed difference of the traction roller group, the tension of the packing strap in the traction path is directly adjusted. This is coordinated with the synchronous adjustment of the speed of the winding unit to form a dynamic tension balance mechanism. At the same time, the hydraulic telescopic rod drives the mounting seat to slide, compressing or releasing the elastic force of the spring on the pressure roller, so that the squeezing pressure between the pressure roller and the winding roller is adaptively adjusted with the tension change. When the tension is too high, the hydraulic system drives the mounting seat to move upward, and the spring buffers and releases part of the pressure, avoiding excessive tension of the strap. The elastic compensation characteristics of the spring can also absorb tension fluctuations in real time, preventing the inner layer of the strap roll from breaking or plastically deforming due to stress concentration. This also reduces the mechanical wear of the winding roller and the traction roller. Finally, through the dual mechanism of traction speed difference adjustment and dynamic compensation of clamping force, the problem of tension control imbalance that is prone to occur in traditional packing straps is solved. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 An isometric view of a PET plastic steel strapping tension adjustment mechanism according to an embodiment of this utility model. Figure 1 ;

[0019] Figure 2 An isometric view of a PET plastic steel strapping tension adjustment mechanism according to an embodiment of this utility model. Figure 2 ;

[0020] Figure 3 An isometric view of a PET plastic steel strapping tension adjustment mechanism according to an embodiment of this utility model. Figure 3 ;

[0021] Figure 4 This is an isometric view of the pressure regulating structure according to an embodiment of the present invention;

[0022] Figure 5 for Figure 3 A magnified view of part A in the image.

[0023] Icons: 1-Processing platform, 2-Traction roller, 3-Guide groove, 4-Guide rod, 5-Mounting base, 501-Mounting part, 502-Moving part, 503-Connecting rod, 504-Fixed part, 6-Pressure roller, 7-Winding roller, 8-Hydraulic telescopic rod, 9-First drive motor, 10-Second drive motor, 11-Gearbox, 12-Spring, 13-Distance sensor. Detailed Implementation

[0024] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0025] Example

[0026] Please refer to Figures 1-5 This application provides a PET plastic steel strapping tension adjustment mechanism applied to a winding machine. The winding machine includes a processing platform 1 and a winding unit disposed on the processing platform 1. The tension adjustment mechanism includes: a traction unit comprising a plurality of traction rollers 2 in traction cooperation, and any one of the traction rollers 2 is rotatably disposed on the processing platform 1; wherein the traction rollers 2 at the inlet and outlet ends of the traction unit are both drivenly connected to a first drive motor 9, the inlet end being used to receive PET plastic steel strapping, and the outlet end being adapted to the winding unit; and a pressure adjustment structure comprising a mounting base 5, a pressure roller 6, a spring 12, and a hydraulic telescopic rod 8, the pressure roller 6 being in compression cooperation with the winding roller 7 of the winding unit, and elastically connected to the mounting base 5 through the spring 12, the mounting base 5 being slidably disposed on the processing platform 1, and the hydraulic telescopic rod 8 being disposed on the processing platform 1 and connected to the mounting base 5, for driving the mounting base 5 to slide on the processing platform 1.

[0027] The tension adjustment mechanism of this application is applied when the tension of the packing strap in the winding machine is too high. This tension adjustment mechanism achieves coordinated adaptation through the differential speed control of dual drive motors and the combined pressure adjustment of hydraulic-spring 12: the first drive motor 9 at the feed end and the discharge end of the traction unit can independently adjust its speed. By changing the conveying speed difference of the traction roller 2 group, the tension of the packing strap in the traction path is directly adjusted. This is coordinated with the synchronous adjustment of the speed of the winding unit to form a dynamic tension balance mechanism. At the same time, the hydraulic telescopic rod 8 drives the mounting seat 5 to slide, compressing or releasing the elastic force of the spring 12 on the pressure roller 6, so that the squeezing pressure between the pressure roller 6 and the winding roller 7 is adaptively adjusted with the tension change. When the tension is too high, the hydraulic system drives the mounting seat 5 to move upward, and the spring 12 buffers and releases part of the pressure to avoid excessive tension of the strap. The elastic compensation characteristic of the spring 12 can also absorb tension fluctuations in real time, preventing the inner layer of the strap roll from breaking or plastically deforming due to stress concentration. This also reduces the mechanical wear of the winding roller 7 and the traction roller 2. Finally, through the dual mechanism of traction speed difference adjustment and dynamic compensation of clamping force, the problem of tension control imbalance that is prone to occur in traditional packing straps is solved.

[0028] In a preferred embodiment, the winding roller 7 of the winding unit is driven by a gearbox 11, and the gearbox 11 is driven by a second drive motor 10.

[0029] In the above embodiments, as the packing tape winding gradually increases in diameter from the initial core, the gearbox 11 can adjust the transmission ratio in real time, making the rotational speed of the second drive motor 10 inversely proportional to the change in tape diameter, ensuring a constant linear speed of the winding roller 7, thereby maintaining the stability of the packing tape tension. At the same time, the gearbox 11 can automatically increase the output torque according to the load change caused by the increase in tape diameter (such as an increase in tape weight), avoiding motor overload. Especially when winding PET tape at high temperatures, the torque compensation mechanism of the gearbox 11 can prevent winding jamming caused by material shrinkage stress. In addition, the linkage design of the gearbox 11 and the second drive motor 10 supports tension closed-loop control. When the tension sensor detects fluctuations, the system can adjust the transmission ratio of the gearbox 11 and the motor speed to achieve millisecond-level response of the winding speed. Combined with the differential speed adjustment of the traction unit and the pressure compensation of the pressure roller 6, a multi-dimensional tension collaborative control is formed, improving the uniformity of tension in the inner and outer layers of the tape roll and the reliability of equipment operation.

[0030] In a preferred embodiment, the mounting base 5 includes: a mounting portion 501, slidably disposed on the processing platform 1; a fixed portion 504, fixedly disposed on the mounting portion 501; a movable portion 502, slidably disposed on the mounting portion 501, and cooperating with the fixed portion 504 in an opposing or disengaging manner; and a connecting rod 503, one end of which is connected to the movable portion 502, and the other end of which passes through the fixed portion 504 and is rotatably connected to the pressure roller 6; wherein the spring 12 is sleeved on the connecting rod 503 between the fixed portion 504 and the movable portion 502, and both ends are respectively connected to the fixed portion 504 and the movable portion 502.

[0031] In the above embodiment, the mounting base 5 adopts a layered linkage structure of "mounting part 501 - fixed part 504 - movable part 502 - connecting rod 503 - spring 12". Its core advantage lies in achieving precise and flexible tension compensation through a composite design of mechanical elasticity and sliding adjustment: the opposing sliding cooperation between the movable part 502 and the fixed part 504 allows the compression of the spring 12 on the connecting rod 503 to change linearly with the driving displacement of the hydraulic telescopic rod 8, forming a dual adjustment mechanism of "hydraulic drive coarse adjustment + spring 12 elastic fine adjustment"—when the hydraulic telescopic rod 8 pushes the mounting base 5 to move as a whole, the movable part 502... The spring 12 can slide adaptively on the mounting part 501 to avoid sudden pressure changes caused by rigid extrusion. The spring 12 is sleeved between the fixed part 504 and the movable part 502. It can absorb the impact of tension fluctuations of the packing tape through elastic deformation, and can also form a dynamic buffer for the extrusion pressure of the pressure roller 6 and the winding roller 7 to prevent stress concentration of the tape due to excessive local pressure. In addition, the design of the connecting rod 503 passing through the fixed part 504 ensures the stability of the position of the pressure roller 6, so that the elastic force is evenly transmitted to the winding contact surface. Combined with the driving accuracy of the hydraulic system, it realizes the smooth transition and real-time compensation of pressure during tension adjustment.

[0032] In a preferred embodiment, the guide structure formed by the connecting rod 503 and the spring 12 is in the form of two sets.

[0033] In the above embodiment, the guide structure consisting of two sets of connecting rods 503 and springs 12 can significantly improve the operational stability and tension adjustment balance of the pressure roller 6. The two sets of guide structures are symmetrically distributed at both ends of the pressure roller 6, which can effectively avoid the roller tilting or offset caused by unilateral force, ensuring that the pressure roller 6 and the winding roller 7 always maintain parallel compression, so that the strapping is subjected to uniform force and prevents damage to the strapping material due to excessive local pressure.

[0034] In a preferred embodiment, a distance sensor 13 is provided on the side of the fixed part 504 facing the movable part 502.

[0035] In the above embodiment, a distance sensor 13 is provided on the side of the fixed part 504 facing the movable part 502, which can monitor the relative displacement between the movable part 502 and the fixed part 504 in real time, accurately feedback the compression of the spring 12, provide adjustment basis for the hydraulic telescopic rod 8, realize closed-loop precise control of the tension of the packing strap, and effectively avoid damage to the strapping material or winding quality problems caused by improper pressure adjustment.

[0036] In a preferred embodiment, the processing platform 1 is provided with a guide rod 4, and the fixing part 504 is slidably connected to the guide rod 4.

[0037] In the above embodiment, the guide rod 4 provides rigid support for the reciprocating motion of the fixing part 504, avoids lateral displacement when the hydraulic telescopic rod 8 is driven, ensures that the parallelism error between the pressing roller 6 and the winding roller 7 is controlled within a very small range, and makes the packing strap uniformly stressed during the winding process.

[0038] In a preferred embodiment, the processing platform 1 is further provided with a guide groove 3, which slides in conjunction with the fixing part 504.

[0039] The two ends of the fixing part 504 are respectively slidably engaged with the guide rod 4 and the guide groove 3.

[0040] In the above embodiments, the guide groove 3 and the guide rod 4 form a bidirectional guide structure, which further improves the stability of the mounting base 5 sliding on the processing platform 1.

[0041] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0042] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A PET plastic steel strapping tension adjustment mechanism, applied to a winding machine, the winding machine comprising a processing platform (1) and a winding unit disposed on the processing platform (1), characterized in that, The tension adjustment mechanism includes: The traction unit includes a plurality of traction rollers (2) that are engaged in traction, and any one of the traction rollers (2) is rotatably mounted on the processing platform (1); The traction rollers (2) at the feed end and the discharge end of the traction unit are both connected to a first drive motor (9). The feed end is used to receive PET plastic steel packing straps, and the discharge end is adapted to the winding unit. The pressure regulating structure includes a mounting base (5), a pressure roller (6), a spring (12), and a hydraulic telescopic rod (8). The pressure roller (6) is pressed and engaged with the winding roller (7) of the winding unit and is elastically connected to the mounting base (5) through the spring (12). The mounting base (5) is slidably mounted on the processing platform (1). The hydraulic telescopic rod (8) is mounted on the processing platform (1) and connected to the mounting base (5) for driving the mounting base (5) to slide on the processing platform (1).

2. The PET plastic steel strapping tension adjustment mechanism according to claim 1, characterized in that, The winding roller (7) of the winding unit is driven by a gearbox (11), and the gearbox (11) is driven by a second drive motor (10).

3. The PET plastic strapping tension adjustment mechanism according to claim 1, characterized in that, The mounting base (5) includes: The mounting part (501) is slidably mounted on the processing platform (1); The fixing part (504) is fixedly disposed on the mounting part (501); The movable part (502) is slidably disposed on the mounting part (501) and is engaged with the fixed part (504) facing or separating from it; A connecting rod (503) has one end connected to the movable part (502) and the other end passing through the fixed part (504) and rotatably connected to the pressure roller (6); The spring (12) is sleeved on the connecting rod (503) between the fixed part (504) and the movable part (502), and its two ends are respectively connected to the fixed part (504) and the movable part (502).

4. The PET plastic steel strapping tension adjustment mechanism according to claim 3, characterized in that, The number of guide structures formed by the connecting rod (503) and the spring (12) is two.

5. The PET plastic steel strapping tension adjustment mechanism according to claim 3, characterized in that, A distance sensor (13) is provided on the side of the fixed part (504) facing the movable part (502).

6. The PET plastic strapping tension adjustment mechanism according to claim 3, characterized in that, The processing platform (1) is provided with a guide rod (4), and the fixing part (504) is slidably connected to the guide rod (4).

7. The PET plastic steel strapping tension adjustment mechanism according to claim 6, characterized in that, The processing platform (1) is also provided with a guide groove (3), which slides in cooperation with the fixing part (504); The two ends of the fixing part (504) are slidably engaged with the guide rod (4) and the guide groove (3), respectively.

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