Composite PET plastic steel belt

Abstract

The invention relates to the technical field of PET plastic steel belts, in particular to a composite PET plastic steel belt which comprises a plastic steel belt body, a limiting ring is arranged outside the plastic steel belt body and surrounds the plastic steel belt body, the limiting ring is used for preventing the plastic steel belt body from being split into small strips to be dispersed in the lateral direction, and a cutting assembly is further arranged between the limiting ring and the plastic steel belt. The cutting assembly comprises a rotating shaft rotationally arranged on the limiting ring, a grabbing part is arranged at one end of the rotating shaft, a pushing spring is arranged in the limiting ring, the axis direction of the rotating shaft is perpendicular to the radial direction of the plastic steel belt body, and a plurality of first blades are arranged on the rotating shaft. The side direction of the plastic steel belt body is limited through the limiting rings, the situation that the strength of the plastic steel belt is affected after the plastic steel belt body is punctured and split into a plurality of small strips by sharp objects and then scattered is avoided, and the cutting assembly is further arranged in the limiting rings so that the plastic steel belt can be conveniently cut off.

Description

Technical Field

[0001] The invention relates to the technical field of PET plastic-steel belts, in particular to a composite PET plastic-steel belt. Background Art

[0002] PET plastic steel belt is a polyester strapping belt component made of polyethylene terephthalate as the main raw material, which is formed by extrusion and unidirectional stretching. PET plastic steel belt can be used in a stress state for a long time. It is a new type of environmentally friendly packaging material with low cost. It can replace metal strapping belts such as steel belts and steel wires. It can also be thermoplastically pressed into shape according to the needs of oil pressure patterns, lines and lines during production.

[0003] However, when in use, the PET plastic-steel belt is in a taut state and is subjected to radial tension as a whole. The overall lateral tensile strength of the PET plastic-steel belt is insufficient. After being pierced by a sharp thorn, the PET plastic-steel belt is easily split laterally into small strips. The PET plastic-steel belt split into small strips is easy to slide, resulting in the dispersion of the binding position of the goods, and the binding ability of the goods is weakened. In addition, the strength of the dispersed small strips of PET plastic-steel belts is reduced, and they are prone to breakage, which in turn causes the goods to lose their restraints and become loose, causing safety accidents.

[0004] In addition, the existing PET plastic-steel belts are connected by thermoplastic bonding after bundling, and tools such as scissors and pliers are needed to cut the PET plastic-steel belts. When there are no tools, people need to find tools first to cut the plastic-steel belts, which reduces the efficiency of cargo disassembly.

[0005] Therefore, a composite PET plastic-steel belt is proposed to prevent the PET plastic-steel belt from being subjected to poor stress after being split laterally, and to facilitate cutting of the plastic-steel belt. Summary of the invention

[0006] The object of the present invention is to provide a composite PET plastic-steel belt to solve the problems of poor stress resistance and inconvenience in cutting of the PET plastic-steel belt after lateral splitting proposed in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A composite PET plastic-steel belt comprises a plastic-steel belt body, a limiting ring is arranged around the plastic-steel belt body outside, the limiting ring is used to prevent the plastic-steel belt body from splitting into small strips and then dispersing laterally, a cutting assembly is also arranged between the limiting ring and the plastic-steel belt, the cutting assembly comprises a rotating shaft rotatably arranged on the limiting ring, a gripping portion is arranged at one end of the rotating shaft, the gripping portion passes through the side wall of the limiting ring and extends out of the limiting ring, a pushing spring is arranged inside the limiting ring, the pushing spring is used to keep the rotating shaft pushed in the direction of the gripping portion, the axial direction of the rotating shaft is perpendicular to the radial direction of the plastic-steel belt body, a plurality of first blades are arranged on the rotating shaft, the first blades are all located between the plastic-steel belt body and the limiting ring, the plurality of first blades are evenly arranged along the lateral direction of the plastic-steel belt body, a second blade is also arranged on the side of the first blade, and the second blade is perpendicular to the first blade.

[0009] By arranging a limiting ring around the outside of the plastic steel belt body, the limiting ring is used to limit the lateral direction of the plastic steel belt body, so as to prevent the plastic steel belt body from being scattered after being pierced by a sharp object and split into multiple small strips, thereby affecting the strength of the plastic steel belt, and also to prevent these split small strips from sliding to other positions of the goods and failing to effectively bind the goods. When multiple limiting rings are arranged at intervals on the plastic steel belt body, it is also possible to prevent the cracks of the plastic steel belt body from spreading along the radial direction of the plastic steel belt body after the plastic steel belt body is broken, thereby further ensuring the strength of the plastic steel belt when in use.

[0010] When the plastic-steel belt body needs to be cut, it is only necessary to rotate the rotating shaft, let the first blade rotate toward the direction of the plastic-steel belt body and cut the plastic-steel belt body into multiple small strips along the radial direction of the plastic-steel belt body. After the first blade cuts the plastic-steel belt body into multiple small strips, push the rotating shaft in the direction of the push spring, and the second blade cuts the plastic-steel belt body cut into small strips one by one. There is no need to find additional tools to cut the plastic-steel belt, which facilitates the disassembly of the goods.

[0011] Taking advantage of the fact that the plastic-steel belt itself is easy to crack along the axial direction, the plastic-steel belt body is first split into multiple small strips, which makes it easier for the second blade to cut these split small strips. This is more labor-saving than cutting the entire plastic-steel belt.

[0012] Preferably, the limiting ring is divided into an upper cover and a bottom groove, the rotating shaft and the pushing spring are both arranged on the upper cover, and latches are arranged on the left and right sides of the bottom groove, and a hook portion is arranged at one end of the latch away from the bottom groove, and the hook portion is folded back toward the bottom groove, and the hook portion is made of elastic material, and pin holes matching the latch are correspondingly opened on the left and right sides of the upper cover.

[0013] The limiting ring is separated from the plastic-steel belt body, and the limiting ring is divided into an upper cover and a bottom groove, and they are connected by plugging, which is convenient for the installation of the limiting ring, so that the limiting ring can be put on any position of the plastic-steel belt body according to the needs of use, and it is also convenient for the user to reasonably determine the number of limiting rings to be used and the distance between adjacent limiting rings according to the usage situation, thereby improving the convenience of the plastic-steel belt during use.

[0014] Preferably, a torsion spring is provided on the upper cover, and the torsion spring is used to keep the first blade parallel to the upper surface of the plastic-steel belt body. The torsion spring keeps the first blade parallel to the upper surface of the plastic-steel belt body, so as to prevent the first blade from contacting the upper surface of the plastic-steel belt body due to shaking during the transportation of goods, and to prevent the first blade from scratching the plastic-steel belt body and reducing the strength of the plastic-steel belt.

[0015] Preferably, a pressing block is provided on the rotating shaft, and the pressing block is made of soft rubber material. The pressing block is fixedly mounted on the rotating shaft, and the angle between the pressing block and the first blade is 90°. When the first blade is parallel to the upper surface of the plastic-steel belt body, the pressing block faces the direction of the plastic-steel belt body and presses the plastic-steel belt body toward the bottom groove.

[0016] The pressing block is pressed on the upper surface of the plastic-steel belt body, pressing the plastic-steel belt body toward the bottom groove on the bottom groove, further limiting the position of the plastic-steel belt body, and the pressing block is made of soft rubber material, which can generate a large friction force when in contact with the plastic-steel belt body to prevent the plastic-steel belt body from sliding after splitting, and the pressing block can also adapt to the upper surface of the plastic-steel belt body by deformation, which helps to increase the contact area between the pressing block and the plastic-steel belt body, and helps to increase the friction between the pressing block and the plastic-steel belt body to further prevent the plastic-steel belt body from sliding after splitting.

[0017] After the pressing block is deformed, it will push the upper cover upwards under the action of elastic force, which helps to increase the preload force between the upper cover and the bottom groove, ensure that the upper cover and the bottom groove will not loosen, and ensure that the limit ring will not slide during use, avoiding changes in the distance between two adjacent limit rings during use. Because the distance between two adjacent limit rings is too long, if the plastic-steel belt body between the two adjacent limit rings is cracked into multiple small strips, these small strips are easy to slide to other positions of the goods and cannot effectively bundle the goods. In addition, the cracked small strips are easy to touch other sharp objects and break after sliding freely, which reduces the bundling effect of the goods and is prone to safety accidents. The setting of the pressing block helps to ensure the stability of the plastic-steel belt during use.

[0018] Preferably, the gripping portion is rotatably connected to the rotating shaft via a pin, and a side wall of the upper cover on one side of the gripping portion is provided with a slot for clamping the gripping portion. When the gripping portion is inserted into the slot, the connection between the gripping portion and the rotating shaft does not protrude outside the side wall of the upper cover.

[0019] The gripping part is inserted into the card slot to prevent other goods from touching the gripping part during the process of bundling and transporting the goods by the plastic-steel belt body, causing the first blade and the second blade to move between the plastic-steel belt body and the upper cover, further preventing the first blade and the second blade from accidentally damaging the plastic-steel belt body, causing the strength of the plastic-steel belt body to decrease, and further ensuring the stability of the plastic-steel belt during use.

[0020] Preferably, the upper surface of the plastic-steel belt body is provided with a plurality of protrusions and a plurality of recesses, both of which are arc-shaped, and the protrusions and recesses are arranged alternately, and the protrusions and recesses are smoothly transitionally connected, and the plurality of recesses are aligned one by one with the plurality of first blades. The provision of the protrusions and recesses increases the contact area between the pressing block and the plastic-steel belt body, thereby increasing the friction between the pressing block and the plastic-steel belt body, helping to further limit the plastic-steel belt body, further avoiding the dispersion of the plastic-steel belt body after cracking and affecting its strength, and ensuring the bundling effect of the plastic-steel belt body on the goods. The alignment of the recesses with the first blade helps to guide the first blade, facilitates the cutting of the plastic-steel belt body by the first blade, and improves the effect of the first blade when cutting the plastic-steel belt body. At the same time, the setting of the recessed portion also increases the distance between the first blade and the plastic-steel belt body, avoiding the first blade and the plastic-steel belt body from contacting each other due to shaking of the goods when the plastic-steel belt is used to bundle the goods, and avoiding the first blade scratching the plastic-steel belt body and reducing the strength of the plastic-steel belt body.

[0021] The raised and recessed parts are both arc-shaped and smoothly transitioned, which can avoid stress concentration at the sharp corners of the plastic-steel belt body after it is bent during the process of bundling goods with the plastic-steel belt, causing the plastic-steel belt body to crack into small strips, further ensuring the use strength of the plastic-steel belt.

[0022] Preferably, friction plates are provided on both the front and rear sides of the upper cover, the width of the friction plates is the same as the width of the plastic-steel belt body, the upper end of the friction plate is fixed on the upper cover, the lower end of the friction plate is a free end, the friction plate is made of soft rubber, and the lower end of the friction plate abuts against the upper surface of the plastic-steel belt body.

[0023] The friction plate abuts against the upper surface of the plastic-steel belt body, further preventing the plastic-steel belt body from splitting and dispersing through friction. In addition, the friction plate helps prevent dust, stones, debris and other debris from entering between the limit ring and the plastic-steel belt body, ensuring that they will not affect the rotation of the shaft, and helping to ensure the normal use of the cutting assembly. In addition, when the plastic-steel belt body is used to tie up goods, it is usually in a tight state. Cutting the plastic-steel belt body at this time may cause the plastic-steel belt body to suddenly break and injure nearby personnel. The friction plate is blocked at the front and rear ends of the upper cover to block the plastic-steel belt body from suddenly breaking, preventing the broken plastic-steel belt body from injuring people.

[0024] Preferably, extrusion parts are provided inside both left and right sides of the upper cover, and the two extrusion parts are arranged in a trumpet shape as a whole, and the two extrusion parts gradually move away from the top direction of the upper cover toward the bottom groove.

[0025] The trumpet-shaped extrusion portion makes the lower opening of the upper cover gradually shrink upwards. In this way, when the upper cover presses the plastic-steel belt body from top to bottom, the plastic-steel belt body can be squeezed from both sides to the middle, further improving the limiting effect of the limiting ring on the plastic-steel belt body, and preventing the plastic-steel belt from spreading out after the body splits and affecting the bundling effect on the objects.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The composite PET plastic-steel belt designed by the present invention has a limiting ring arranged around the outside of the plastic-steel belt body, and the limiting ring is used to limit the lateral direction of the plastic-steel belt body, so as to prevent the plastic-steel belt body from being scattered after being pierced by sharp objects and split into multiple small strips, thereby affecting the strength of the plastic-steel belt. When multiple limiting rings are arranged at intervals on the plastic-steel belt body, it can also prevent the cracks of the plastic-steel belt body from spreading radially along the plastic-steel belt body after the plastic-steel belt body is broken, thereby further ensuring the strength of the plastic-steel belt when in use.

[0028] 2. The composite PET plastic-steel belt designed by the present invention is also provided with a first blade and a second blade on the limit ring. By rotating the rotating shaft, the first blade can be used to tear the plastic-steel belt body surrounded by the limit ring into multiple small strips. Finally, the second blade can be used to cut the plastic-steel belt body in small strips by pushing the rotating shaft, which is convenient for cutting the plastic-steel belt when there are no tools. The first blade is kept parallel to the plastic-steel belt body by the torsion spring, and will not damage the plastic-steel belt body under normal use.

[0029] 3. The composite PET plastic-steel belt designed by the present invention also has a plurality of protrusions and a plurality of recesses on the plastic-steel belt body. The protrusions and recesses increase the contact area between the pressing block and the plastic-steel belt body, which helps to further limit the plastic-steel belt body and further prevent the plastic-steel belt body from being dispersed after cracking and affecting its strength. In addition, the recess is aligned with the first blade, which helps to guide the first blade and improves the effect of the first blade when cutting the plastic-steel belt body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0031] Figure 2 A three-dimensional diagram of the internal structure of the upper cover of the present invention;

[0032] Figure 3 It is a front view of the present invention;

[0033] Figure 4 For the present invention Figure 3 Sectional view at AA in the middle;

[0034] Figure 5 For the present invention Figure 4 The enlarged view of point B in the middle;

[0035] Figure 6 It is a three-dimensional diagram of the rotating shaft, the first blade, and the second blade of the present invention;

[0036] Figure 7 It is a front view of the rotating shaft, the first blade and the second blade of the present invention;

[0037] Figure 8 It is a schematic diagram of the three-dimensional structure of the bottom groove of the present invention.

[0038] In the figure: 1, steel belt body; 2, limit ring; 201, upper cover; 202, bottom groove; 3, rotating shaft; 4, gripping part; 5, pushing spring; 6, first blade; 7, second blade; 8, latch; 9, hook part; 10, pin hole; 11, torsion spring; 12, pressing block; 13, pin shaft; 14, slot; 15, raised part; 16, recessed part: 17, friction plate; 18, extrusion part; 19, guide ramp; 20, push plate; 21, rotating gripping plate; A1, radial direction; A2, lateral direction. DETAILED DESCRIPTION

[0039] See also Figures 1 to 8 The present invention provides a composite PET plastic-steel belt, and the technical solution is as follows:

[0040] A composite PET plastic steel belt, reference Figure 1 and Figure 2 , comprising a plastic-steel belt body 1, the upper surface of which is provided with a plurality of raised portions 15 and a plurality of recessed portions 16, wherein the raised portions 15 and the recessed portions 16 are alternately arranged.

[0041] refer to Figures 1 to 5The plastic-steel belt body 1 is provided with a limit ring 2 around the plastic-steel belt. The limit ring 2 is divided into an upper cover 201 and a bottom groove 202. The left and right sides of the upper cover 201 are provided with an extrusion part 18. The two extrusion parts 18 are provided in a trumpet shape as a whole. The two extrusion parts 18 gradually move away from the top direction of the upper cover 201 toward the bottom groove 202. The front and rear sides of the upper cover 201 are provided with a friction plate 17. The width of the friction plate 17 is the same as the width of the plastic-steel belt body 1. The upper end of the friction plate 17 is fixed on the upper cover 201, and the lower end of the friction plate 17 is a free end. The friction plate 17 is made of soft rubber, and the lower end of the friction plate 17 is used to abut against the upper surface of the plastic-steel belt body 1. The left and right sides of the bottom groove 202 are provided with a latch 8. The end of the latch 8 away from the bottom groove 202 is provided with a hook part 9, and the hook part 9 is folded back toward the bottom groove 202. The hook portion 9 is made of elastic material, and the hook portion 9 can be made of an elastic metal sheet. The left and right sides of the upper cover 201 are respectively provided with pin holes 10 that match the plug pin 8. The stop ring 2 is used to prevent the plastic steel belt body 1 from splitting into small strips and then dispersing laterally.

[0042] refer to Figure 2 , Figure 4 , Figure 6 and Figure 7 A cutting assembly is also provided between the limit ring 2 and the plastic-steel belt, and the cutting assembly includes a rotating shaft 3 rotatably provided on the upper cover 201, and both ends of the rotating shaft 3 are rotatably connected to both sides. A gripping portion 4 is provided at one end of the rotating shaft 3, and the gripping portion 4 extends out of the side wall of the upper cover 201. The gripping portion 4 is rotatably connected to the rotating shaft 3 through a pin shaft 13. A slot 14 for clamping the gripping portion 4 is provided on the side wall of the upper cover 201 on one side of the gripping portion 4. When the gripping portion 4 is clamped into the slot 14, the connection between the gripping portion 4 and the rotating shaft 3 does not protrude out of the side wall of the upper cover 201. A push spring 5 is arranged inside the upper cover 201, and the push spring 5 is used to push the rotating shaft 3 toward the gripping portion 4. The axial direction of the rotating shaft 3 is perpendicular to the radial direction A1 of the plastic-steel belt body 1. A plurality of first blades 6 are arranged on the rotating shaft 3, and the first blades 6 are all located between the plastic-steel belt body 1 and the limiting ring 2. The plurality of first blades 6 are evenly arranged along the lateral direction A2. The first blade 6 is used to split the plastic-steel belt along the radial direction A1 into a plurality of small strips. A second blade 7 is also arranged on the side of the first blade 6, and the second blade 7 is perpendicular to the first blade 6. A guide slope 19 is arranged at the angle between the first blade 6 and the second blade 7, and the second blade 7 is used to cut off the plastic-steel belt body 1 after being split by the first blade 6. The length of the first blade 6 shall not extend outside the upper cover 201.

[0043] refer to Figure 6 and Figure 7 A pressing block 12 is also provided on the rotating shaft 3. The pressing block 12 is made of soft rubber material. The pressing block 12 is fixedly mounted on the rotating shaft 3, and the angle between the pressing block 12 and the first blade 6 is 90°.

[0044] When using, refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 When the plastic-steel belt body 1 is used to bundle the goods, the side of the plastic-steel belt body 1 with the concave portion 16 and the convex portion 15 faces outward, while the flat side faces the goods. Then, the bottom groove 202 is set between the goods and the plastic-steel belt body 1, and the plastic-steel belt body 1 is inserted into the bottom groove 202. Then, the upper cover 201 is brought above the bottom groove 202, and the pin hole 10 of the upper cover 201 is aligned with the latch 8 on the bottom groove 202. Then, the latch 8 is inserted into the pin hole 10 until the hook portion 9 completely passes through the pin hole 10 from the top of the upper cover 201. At this time, the connection between the upper cover 201 and the bottom groove 202 is completed, and the plastic-steel belt body 1 is surrounded by the upper cover 201 and the bottom groove 202. The pressing block 12 on the upper cover 201 presses on the raised portion 15 and the recessed portion 16 on the plastic-steel belt body 1, and the pressing block 12 is deformed and fits with the upper surface of the plastic-steel belt body 1. The torsion spring 11 keeps the first blade 6 parallel to the upper surface of the plastic-steel belt body 1, and the plurality of first blades 6 are aligned one by one with the plurality of recessed portions 16. The gripping portion 4 in the initial state is bent along the pin 13 and snapped into the inside of the card slot 14. In this way, the limiting ring 2 is fastened to the outside of the plastic-steel belt body 1. Subsequently, the limiting ring 2 is evenly distributed on the plastic-steel belt body 1 according to the above steps, with an interval of 20 cm as a reference. The limiting ring 2 limits the plastic-steel belt body 1 from the lateral direction A2 to prevent the plastic-steel belt body 1 from sliding in the lateral direction A2 after being split into small strips.

[0045] When the plastic-steel belt body 1 needs to be cut, refer to Figure 2 as well as Figures 5 to 7, select one of the limit rings 2, the gripping portion 4 on the limit ring 2 is taken out from the slot 14, and the gripping portion 4 is made coaxial with the rotating shaft 3. Then the rotating shaft 3 is rotated to rotate the first blade 6 toward the direction of the plastic steel belt body 1 below. As the first blade 6 gradually rotates, the pressing block 12 gradually separates from the upper surface of the plastic steel belt body 1. After the first blade 6 rotates, it cuts into the inside of the plastic steel belt body 1 along the recessed portion 16, and the plastic steel belt body 1 is split into uniform small strips by the first blade 6 along the radial direction A1. When the first blade 6 is perpendicular to the bottom surface of the bottom groove 202, the gripping portion 4 is pressed toward the direction of the push spring 5, and the rotating shaft 3 moves along the axis toward the direction of the push spring 5. At this time, the second blade 7 is perpendicular to the radial direction A1 of the plastic steel belt body 1, and the second blade 7 moves toward the direction of the push spring 5 together with the rotating shaft 3. The sharp edge of the second blade 7 cuts off the plastic steel belt body 1 split into uniform small strips one by one. Since the plastic-steel belt body 1 is subjected to a tensile force along the radial direction A1 when bundling the goods, at this time, when the plastic-steel belt body 1 is cut off and collapsed, under its own elastic force, the plastic-steel belt body 1 is broken from the fracture, and the friction plate 17 reduces the speed of the plastic-steel belt body 1 that flies out of the fracture through friction, so as to prevent the broken plastic-steel belt body 1 from causing harm to the human body. Subsequently, the gripping part 4 is released, and under the action of the torsion spring 11, the first blade 6 is reset by the torsion spring 11 to a state parallel to the bottom surface of the bottom groove 202, and the push spring 5 also resets the rotating shaft 3 under the action of the elastic force, and then the gripping part 4 is re-inserted into the inside of the card slot 14. At this point, the cutting operation of the plastic-steel belt body 1 is completed. After the plastic-steel belt body 1 is cut off by the second blade 7, the limit ring 2 can also be recycled for reuse.

[0046] In addition, reference Figure 6 In order to make it more convenient for manual use, a push piece 20 can be added at the end of the gripping portion 4. The push piece 20 is used to increase the force area between the user's hand and the gripping portion 4 when the user pushes the rotating shaft 3 toward the direction of the pushing spring 5, making it more convenient to push the rotating shaft 5. Secondly, a rotating gripping piece 21 can be added perpendicular to the push piece 20 on the side of the push piece 20 away from the rotating shaft 3, so that the human hand can better grip when rotating the rotating shaft 3.

[0047] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A composite PET plastic-steel belt, comprising a plastic-steel belt body (1), characterized in that: A limiting ring (2) is arranged around the plastic steel belt body (1) on the outside of the plastic steel belt body, and the limiting ring (2) is used to prevent the plastic steel belt body (1) from being split into small strips and then dispersed in the lateral direction (A2). A cutting assembly is also arranged between the limiting ring (2) and the plastic steel belt, and the cutting assembly includes a rotating shaft (3) rotatably arranged on the limiting ring (2), and a gripping portion (4) is arranged at one end of the rotating shaft (3), and the gripping portion (4) passes through the side wall of the limiting ring (2) and extends out of the limiting ring (2). A pushing spring (5) is arranged inside the limiting ring (2), and the pushing spring (5) is used to keep the rotating shaft (3) pushed in the direction of the gripping portion (4). The axial direction of the rotating shaft (3) is perpendicular to the radial direction (A1) of the plastic-steel belt body (1); a plurality of first blades (6) are arranged on the rotating shaft (3); the plurality of first blades (6) are located between the plastic-steel belt body (1) and the limiting ring (2); the plurality of first blades (6) are evenly spaced along the lateral direction (A2) of the plastic-steel belt body (1); the first blade (6) is used to split the plastic-steel belt into a plurality of small strips along the radial direction; a second blade (7) is also arranged on the side of the first blade (6); the second blade (7) is perpendicular to the first blade (6); the second blade (7) is used to cut the plastic-steel belt body (1) after being split by the first blade (6).

2. A composite PET plastic-steel belt according to claim 1, characterized in that: The upper surface of the plastic-steel belt body (1) is provided with a plurality of raised portions (15) and a plurality of recessed portions (16), the raised portions (15) and the recessed portions (16) are both arc-shaped, the raised portions (15) and the recessed portions (16) are arranged alternately, and the connection between the raised portions (15) and the recessed portions (16) is smoothly transitioned, and the plurality of recessed portions (16) are aligned one by one with the plurality of first blades (6).

3. The composite PET plastic-steel belt according to claim 1, characterized in that: The limiting ring (2) is divided into an upper cover (201) and a bottom groove (202); the rotating shaft (3) and the pushing spring (5) are both arranged on the upper cover (201); a latch (8) is arranged on both the left and right sides of the bottom groove (202); a hook portion (9) is arranged at one end of the latch (8) away from the bottom groove (202); the hook portion (9) is folded back in the direction of the bottom groove (202); the hook portion (9) is made of elastic material; and pin holes (10) matching the latch (8) are correspondingly opened on both the left and right sides of the upper cover (201).

4. A composite PET plastic-steel belt according to claim 3, characterized in that: The upper cover (201) is provided with a torsion spring (11), and the torsion spring (11) is used to keep the first blade (6) parallel to the upper surface of the plastic-steel belt body (1).

5. A composite PET plastic-steel belt according to claim 4, characterized in that: The rotating shaft (3) is provided with a pressing block (12), and the pressing block (12) is made of a soft rubber material. The pressing block (12) is fixedly mounted on the rotating shaft (3), and the angle between the pressing block (12) and the first blade (6) is 90°. When the first blade (6) is parallel to the upper surface of the plastic-steel belt body (1), the pressing block (12) faces the direction of the plastic-steel belt body (1) and presses the plastic-steel belt body (1) towards the bottom groove (202).

6. The composite PET plastic-steel belt according to claim 3, characterized in that: The gripping portion (4) is rotatably connected to the rotating shaft (3) via a pin shaft (13); a side wall of the upper cover (201) on one side of the gripping portion (4) is provided with a slot (14) for clamping the gripping portion (4); when the gripping portion (4) is clamped into the slot (14), the connection between the gripping portion (4) and the rotating shaft (3) does not protrude outside the side wall of the upper cover (201).

7. The composite PET plastic-steel belt according to claim 1, characterized in that: The upper cover (201) is provided with friction plates (17) on both the front and rear sides. The width of the friction plates (17) is the same as the width of the plastic-steel belt body (1). The upper end of the friction plates (17) is fixed on the upper cover (201). The lower end of the friction plates (17) is a free end. The friction plates (17) are made of soft rubber. The lower end of the friction plates (17) is used to abut against the upper surface of the plastic-steel belt body (1).

8. The composite PET plastic-steel belt according to claim 3, characterized in that: Extrusion parts (18) are arranged inside the left and right sides of the upper cover (201), and the two extrusion parts (18) are arranged in a trumpet shape as a whole, and the two extrusion parts (18) gradually move away from the top direction of the upper cover (201) towards the bottom groove (202).

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