A mandrel transfer and conveying mechanism

Abstract

A mandrel transfer and conveying mechanism includes a cutting component, a preheating box, a heating component, a mandrel, a first fixing component, a second fixing component, a clamping component, and a moving component. The mandrel is disposed inside the preheating box, with its front and rear ends protruding from the front and rear sides of the preheating box, respectively. The first and second fixing components are used to alternately clamp and fix the mandrel. The cutting component is located at the front of the preheating box and is used to cut the pipe material. The heating component is used to heat the interior of the preheating box. The clamping component is used to clamp the pipe material. The moving component is used to drive the clamping component to move back and forth. This invention provides a mandrel transfer and conveying mechanism that solves the problem in the prior art where, when using mandrel-assisted pipe bending, it is usually necessary to manually insert the mandrel or manually place the pipe around the mandrel, resulting in low processing continuity and low production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of conveying mechanisms for pipe bending machines, and in particular to a mandrel conversion and conveying mechanism. Background Technology

[0002] In the field of pipe processing, especially in the pipe bending process, to prevent pipe wall collapse, wrinkling, or cracking during bending, the pipe material is usually preheated before bending to improve its plasticity. Simultaneously, to ensure accurate pipe feeding and avoid dimensional deviations after bending, large-diameter thin-walled pipes require mandrel-assisted guidance and support. However, in existing technologies using mandrel-assisted bending, the mandrel usually needs to be manually inserted or the pipe manually placed around its periphery, resulting in low processing continuity and low production efficiency. Utility Model Content

[0003] The purpose of this invention is to propose a mandrel conversion and conveying mechanism to solve the problem that in the prior art, when using mandrel-assisted pipe bending, it is usually necessary to manually insert the mandrel or manually place the pipe on the outer periphery of the mandrel, which leads to low processing continuity and low production efficiency.

[0004] To achieve this objective, the present invention adopts the following technical solution: A mandrel transfer and conveying mechanism includes a cutting assembly, a preheating box, a heating assembly, a mandrel, a first fixing assembly, a second fixing assembly, a clamping assembly, and a moving assembly; The mandrel is disposed inside the preheating box, and the front and rear ends of the mandrel protrude from the front and rear sides of the preheating box, respectively. The first fixing component and the second fixing component are used to alternately clamp and fix the mandrel. The cutting component is located on the front side of the preheating box. The cutting component is used to cut the pipe material. The heating component is used to heat the interior of the preheating box. The clamping component is used to clamp the pipe material. The moving component is used to drive the clamping component to move back and forth.

[0005] Furthermore, the first fixing component includes a first mounting base, a first driving part, and a first clamping block; The first driving unit is mounted on the first mounting base, and the first clamping blocks are respectively mounted on the upper and lower output ends of the first driving unit. The first driving unit is used to drive the two first clamping blocks to move closer to each other or further away from each other.

[0006] Specifically, the second fixing component includes a second mounting base, a second driving part, a fixing plate, a fixing block, a second clamping block, and a connecting rod; The top of the second mounting base is equipped with the fixing plate, the fixing block is installed on one end of the fixing plate, the middle parts of the upper and lower second clamping blocks are respectively hinged to the upper and lower ends of the fixing block, one end of the upper and lower second clamping blocks is respectively hinged to one end of the connecting rod, and the other end of the upper and lower second clamping blocks is provided with a second clamping groove. The second drive unit is mounted on the other end of the fixed plate, and the output shaft of the second drive unit passes through the fixed plate and is hinged to the other end of the two connecting rods.

[0007] Preferably, the moving component includes a moving base, a slider, a slide rail, a gear rail, a third drive unit, and a gear; The slide rail and the gear rail are respectively located on the outside of the preheating box, and the slider is installed at the bottom of the movable seat, and the slider is slidably mounted on the slide rail; The third drive unit is mounted on the movable base, and the output end of the third drive unit is equipped with the gear, which meshes with the gear rail; The preheating box has a clearance groove on its side. The clamping assembly is installed on the movable base. The clamping end of the clamping assembly passes through the clearance groove and is placed inside the preheating box.

[0008] In some embodiments, it also includes a sealing strip, a connecting plate, a third mounting base, and a pulley; The two third mounting seats are respectively located on the outer sides of the front and rear ends of the preheating box. The two pulleys are rotatably mounted on the left and right ends of the third mounting seats. The two ends of the sealing strip are connected by the connecting plate. The sealing strip is wrapped around the four pulleys. The connecting plate is mounted on the clamping assembly. The sealing strip is directly opposite the clearance groove.

[0009] Furthermore, it also includes a protective cover, the front and rear ends of which are respectively mounted on the two third mounting seats, and the protective cover is placed over the pulley.

[0010] Specifically, the heating assembly includes a hot air blower and a delivery pipe; The hot air blower is located below the preheating box, and the output end of the hot air blower is connected to the interior of the preheating box through the delivery pipe.

[0011] Preferably, the cutting assembly further includes a fourth mounting base, a cutting block, a moving block, a mounting plate, a cutter, a guide rod, and a fourth drive unit; The fourth mounting base is located on the front side of the first fixing component, the cutting block is mounted on the fourth mounting base, and the cutting block is provided with a through hole and a cutting groove, the through hole being directly opposite the core rod; The guide rod is mounted on the fourth mounting base, the movable block is mounted on the guide rod and can move up and down, the cutter is mounted on the movable block through the mounting plate, the cutter is facing the cutting groove, and the fourth driving unit is used to drive the movable block to move up and down.

[0012] In some embodiments, the inner wall of the preheating box is provided with heat insulation cotton.

[0013] Compared with the prior art, one of the above technical solutions has the following beneficial effects: By using a cutting assembly, a preheating box, a heating assembly, a mandrel, a first fixing assembly, a second fixing assembly, a clamping assembly, and a moving assembly, the first fixing assembly and the second fixing assembly are used in an alternating clamping manner to keep the mandrel in a constantly clamped and fixed state. This effectively avoids deviations in the pipe material conveying trajectory caused by mandrel offset and ensures the consistency of the preheating path of the pipe material in the preheating box. It also prevents uneven local preheating of the pipe material from affecting the subsequent pipe bending quality. Moreover, there is no need to manually insert the mandrel to assist in pipe bending, which is conducive to improving the processing continuity and production efficiency of pipe bending. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the protective cover according to one embodiment of the present invention; Figure 2 This is a schematic diagram of the mandrel conversion and conveying mechanism according to one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first fixing component according to one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the second fixing component according to one embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a mobile component according to one embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the cutting component according to one embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the clamping component, the first fixing component, and the second fixing component according to one embodiment of the present invention; The components include: cutting assembly 1, fourth mounting base 11, cutting block 12, through hole 121, cutting groove 122, moving block 13, mounting plate 14, cutter 15, guide rod 16, fourth drive unit 17, preheating box 2, clearance groove 21, conveying pipe 32, mandrel 4, first fixing assembly 5, first mounting base 51, first drive unit 52, first clamping block 53, second fixing assembly 6, second mounting base 61, second drive unit 62, fixing plate 63, fixing block 64, second clamping block 65, second clamping groove 651, connecting rod 66, clamping assembly 7, moving assembly 8, moving base 81, slider 82, slide rail 83, gear rail 84, third drive unit 85, gear 86, sealing strip 91, connecting plate 92, third mounting base 93, pulley 94, and protective cover 95. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "inner side," "outer side," "inner end," "outer end," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, 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. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0017] In one embodiment of this utility model, such as Figure 1-7As shown, a mandrel transfer and conveying mechanism includes a cutting component 1, a preheating box 2, a heating component, a mandrel 4, a first fixing component 5, a second fixing component 6, a clamping component 7, and a moving component 8; the mandrel 4 is disposed inside the preheating box 2, and the front and rear ends of the mandrel 4 protrude from the front and rear sides of the preheating box 2, respectively; the first fixing component 5 and the second fixing component 6 are used to alternately clamp and fix the mandrel 4.The cutting component 1 is located on the front side of the preheating box 2 and is used to cut the pipe material. The heating component is used to heat the interior of the preheating box 2. The clamping component 7 is used to clamp the pipe material. The moving component 8 is used to drive the clamping component 7 to move back and forth. In this embodiment, the first fixing component 5 is located between the preheating box 2 and the cutting component 1, that is, the first fixing component 5 is located on the front side of the preheating box 2, and the clamping end of the first fixing component 5 is located on the outside of the preheating box 2. The second fixing component 6 is located on the left side of the rear end of the preheating box 2, and the clamping end of the second fixing component 6 is located inside the preheating box 2. The clamping component 7 is located on the right side of the preheating box 2, and the clamping end of the clamping component 7 is located inside the preheating box 2. The front side of the cutting component 1 is provided with a corresponding coding mechanism and a pipe material feeding mechanism. The mandrel conversion and conveying mechanism is specifically installed... In the pipe bending machine, the first fixing component 5, the second fixing component 6, the clamping component 7, the moving component 8, the coding mechanism, and the pipe feeding mechanism are electrically connected to the control system of the pipe bending machine. During operation, the heating component starts working to heat the interior of the preheating box 2. The second fixing component 6 clamps and fixes the mandrel 4. At this time, the first fixing component 5 does not work; that is, the clamping end of the first fixing component 5 releases the front end of the mandrel 4. Then, the pipe feeding mechanism starts feeding the pipe, causing the pipe to fit around the mandrel 4 and enter the interior of the preheating box 2. Then, the clamping end of the clamping component 7 clamps the pipe and passes it through the... The moving component 8 drives the tube to move along the length of the mandrel 4. Simultaneously, the coding mechanism records and feeds back the tube's feeding length. Once the tube's feeding length reaches a set value, the tube feeding mechanism and the moving component 8 stop working. The cutting component 1 cuts the tube. After the tube is cut, the moving component 8 drives the clamping component 7 to continue moving the tube towards the rear end of the mandrel 4 until the clamping end of the clamping component 7 moves to the front of the second fixing component 6. Then, the clamping component 7 releases the front end of the tube and resets under the action of the moving component 8, causing the clamping component 7 to move to the front end of the tube and clamp it. During this process, the first... The first fixing component 5 and the second fixing component 6 alternately clamp and fix the mandrel 4. Specifically, the first fixing component 5 clamps and fixes the front end of the mandrel 4. At this time, the outer periphery of the front end of the mandrel 4 is not covered with tube material, while the clamping end of the second fixing component 6 releases the mandrel 4. After the clamping and fixing of the mandrel 4 is completed, the clamping component 7 clamps the front end of the tube material and continues to clamp and move the tube material under the drive of the moving component 8, so that the clamping component 7 moves to the rear side of the second fixing component 6, so that the tube material enters the subsequent tube bending mechanism. During the tube material guiding and conveying process, the tube material is preheated in the preheating box 2 to prepare for the subsequent tube bending after secondary heating.This invention utilizes a cutting component 1, a preheating box 2, a heating component, a mandrel 4, a first fixing component 5, a second fixing component 6, a clamping component 7, and a moving component 8. The first fixing component 5 and the second fixing component 6 employ an alternating clamping method, ensuring that the mandrel 4 is always clamped and fixed. This effectively avoids deviations in the pipe conveying trajectory caused by mandrel 4 offset, and ensures the consistency of the preheating path of the pipe within the preheating box 2. It prevents uneven local preheating of the pipe from affecting the subsequent pipe bending quality. Furthermore, it eliminates the need for manual insertion of the mandrel to assist in bending, thus improving the continuity of pipe bending processing and production efficiency.

[0018] like Figure 1-3 As shown, the first fixing component 5 includes a first mounting base 51, a first driving part 52, and a first clamping block 53. The first driving part 52 is mounted on the first mounting base 51, and the first clamping blocks 53 are respectively mounted on the upper and lower output ends of the first driving part 52. The first driving part 52 is used to drive the two first clamping blocks 53 to move closer to each other or further away from each other. In this embodiment, the first mounting base 51 is mounted on the frame of the pipe bending machine, and the first driving part 52 is a clamping cylinder. When it is necessary to clamp and fix the mandrel 4, the first driving part 52 drives the two output ends to retract vertically in sync, so that the two first clamping blocks 53 move closer to each other and clamp and fix the mandrel 4. When it is released, it drives the two output ends to extend vertically in sync, so that the first clamping blocks 53 move further away from each other. Specifically, the first clamping block 53 is provided with a first clamping groove, which is adapted to the outer periphery of the mandrel 4.

[0019] like Figure 1-2 and Figure 4As shown, the second fixing component 6 includes a second mounting base 61, a second driving part 62, a fixing plate 63, a fixing block 64, a second clamping block 65, and a connecting rod 66; the fixing plate 63 is mounted on the top of the second mounting base 61, the fixing block 64 is mounted on one end of the fixing plate 63, the middle parts of the upper and lower second clamping blocks 65 are respectively hinged to the upper and lower ends of the fixing block 64, one end of the upper and lower second clamping blocks 65 is respectively hinged to one end of the connecting rod 66, and the other end of the upper and lower second clamping blocks 65 is provided with a second clamping groove 651; the second driving part 62 is mounted on the other end of the fixing plate 63, and the output shaft of the second driving part 62 passes through the fixing plate 63 and is hinged to the other end of the two connecting rods 66. In this embodiment, the second drive unit 62 is a dual-shaft cylinder. The second drive unit 62 is mounted on the left end of the fixed plate 63. The two output shafts of the second drive unit 62 pass through the fixed plate 63 and are connected to the upper and lower second clamping blocks 65 through four connecting rods 66. That is, each output shaft is connected to the corresponding upper and lower second clamping blocks 65 through two connecting rods 66. Specifically, the fixed block 64 is fixedly mounted on the right end of the fixed plate 63. The middle part of the upper second clamping block 65 is hinged to the front and rear sides of the top of the fixed block 64. The front and rear ends of the upper second clamping block 65 are hinged to the two output shafts of the second drive unit 62 through two connecting rods 66. The lower second clamping block 65... The middle part is hinged to the front and rear sides of the bottom of the fixed block 64. The front and rear ends of the lower second clamping block 65 are hinged to the two output shafts of the second drive unit 62 through the two connecting rods 66. During operation, the second drive unit 62 drives the two output shafts to extend and retract under the guidance of the fixed plate 63, and drives the second clamping block 65 to swing open and close along the hinge of the fixed block 64 through the connecting rods 66, so that the two second clamping blocks 65 open and close and clamp the fixed core rod 4 through the second clamping block 651. Through the above structure, the output shaft of the second drive unit 62 adopts the left and right extension and retraction method, so that the two second clamping blocks 65 can swing up and down to open and close within the small space inside the preheating box 2 to clamp or release the core rod 4.

[0020] like Figure 1-2 and Figure 5As shown, the moving component 8 includes a moving base 81, a slider 82, a slide rail 83, a gear rail 84, a third drive unit 85, and a gear 86. The slide rail 83 and the gear rail 84 are respectively located on the outside of the preheating box 2. The slider 82 is installed at the bottom of the moving base 81 and is slidably mounted on the slide rail 83. The third drive unit 85 is installed on the moving base 81, and the gear 86 is installed at the output end of the third drive unit 85. The gear 86 meshes with the gear rail 84. The side of the preheating box 2 is provided with a clearance groove 21. The clamping component 7 is installed on the moving base 81, and the clamping end of the clamping component 7 passes through the clearance groove 21 and is placed inside the preheating box 2. In this embodiment, the clamping assembly 7 and the second fixing assembly 6 have the same structure. The slide rail 83 is located on the right side of the preheating box 2, and the gear rail 84 is located on the right side of the slide rail 83. The slide rail 83 and the gear rail 84 are parallel to the length direction of the preheating box 2. The third driving part 85 is a motor. When working, the third driving part 85 drives the gear 86 at its output end to rotate. Under the meshing action of the gear 86 and the gear rail 84, the moving seat 81 moves back and forth along the length direction of the slide rail 83 through the slider 82, thereby causing the clamping end of the clamping assembly 7 to move back and forth along the length direction of the clearance groove 21.

[0021] like Figure 1-2 and Figure 5 As shown, it also includes a sealing strip 91, a connecting plate 92, a third mounting base 93, and pulleys 94; the two third mounting bases 93 are respectively located on the outer sides of the front and rear ends of the preheating box 2, the two pulleys 94 are respectively rotatably mounted on the left and right ends of the third mounting base 93, the two ends of the sealing strip 91 are connected by the connecting plate 92, the sealing strip 91 is wrapped around the four pulleys 94, the connecting plate 92 is mounted on the clamping assembly 7, and the sealing strip 91 is directly opposite the clearance groove 21. In this embodiment, there are two third mounting bases 93 and four pulleys 94. The two third mounting bases 93 are respectively located on the right side of the front and rear ends of the preheating box 2. Each third mounting base 93 has a pulley 94 mounted on its top surface at both ends. The connecting plate 92 is mounted on the clamping assembly 7 and is directly opposite the clearance groove 21. The two ends of the connecting plate 92 are respectively connected to the two ends of the sealing strip 91, so that the sealing strip 91 is in a rectangular structure and wrapped around the four pulleys 94. The sealing strip 91 fits and covers the clearance groove 21. During operation, when the clamping assembly 7 moves back and forth, the clamping assembly 7 drives the connecting plate 92 to move back and forth, and drives the sealing strip 91 to rotate around the four pulleys 94, so that the sealing strip 91 and the connecting plate 92 always fit and cover the clearance groove 21 of the preheating box 2, preventing the heat in the preheating box 2 from being dissipated to the outside through the clearance groove 21. Preferably, the sealing strip 91 is made of a high-temperature resistant and flexible material.

[0022] like Figure 1-2 and Figure 5 As shown, it also includes a protective cover 95, the front and rear ends of which are respectively mounted on the two third mounting bases 93, and the protective cover 95 covers the pulley 94. In this embodiment, the bottom of the front and rear ends of the protective cover 95 are respectively mounted on the top surface of the two third mounting bases 93 by two support rods, and the support rods are located between the two pulleys 94. The protective cover 95 covers the pulley 94 and part of the sealing strip 91, which helps to protect the working stability of the sealing strip 91 and the pulley 94 and prevents them from being disturbed by external factors.

[0023] like Figure 1-2 and Figure 5 As shown, the heating assembly includes a hot air blower and a conveying pipe 32. The hot air blower is located below the preheating box 2, and its output end is connected to the interior of the preheating box 2 through the conveying pipe 32. In this embodiment, an air inlet is provided at the bottom of the rear end of the preheating box 2, and an air outlet is provided at the bottom of the front end of the preheating box 2. The hot air blower is existing technology. During operation, the hot air blows out hot air and conveys it into the interior of the preheating box 2 through the conveying pipe 32, thereby achieving the purpose of heating the interior of the preheating box 2.

[0024] like Figure 1-2 and Figure 6As shown, the cutting assembly 1 further includes a fourth mounting base 11, a cutting block 12, a moving block 13, a mounting plate 14, a cutter 15, a guide rod 16, and a fourth driving unit 17. The fourth mounting base 11 is located on the front side of the first fixing assembly 5. The cutting block 12 is mounted on the fourth mounting base 11. The cutting block 12 has a through hole 121 and a cutting groove 122. The through hole 121 is directly opposite the mandrel 4. The guide rod 16 is mounted on the fourth mounting base 11. The moving block 13 is movable up and down and mounted on the guide rod 16. The cutter 15 is mounted on the moving block 13 through the mounting plate 14. The cutter 15 is directly opposite the cutting groove 122. The fourth driving unit 17 is used to drive the moving block 13 to move up and down. In this embodiment, there are two mounting plates 14 and two guide rods 16. The upper and lower ends of each guide rod 16 are respectively mounted on the inner top and bottom surfaces of the fourth mounting base 11. The left and right ends of the moving block 13 are slidably mounted on the two guide rods 16. The fourth drive unit 17 is a cylinder, mounted on the top of the fourth mounting base 11. The output end of the fourth drive unit 17 is connected to the moving block 13. Specifically, the rear end faces of the left and right ends of the moving block 13 are respectively provided with multiple first mounting holes, while the mounting plate 14 is provided with multiple second mounting holes, and the two ends of the cutter 15 are respectively provided with third mounting holes. During installation, the... The two third mounting holes of the cutter 15 are aligned with the two first mounting holes of the moving block 13. The mounting position of the cutter 15 is adjusted, and then the second mounting hole of the mounting plate 14 is aligned with the third mounting hole and the first mounting hole. The plate is then locked with locking screws. During operation, the tube passes through the through hole 121 of the cutting block 12. After the tube reaches the required length, the output end of the fourth drive unit 17 extends downward, causing the moving block 13 to move downward along the length of the guide rod 16. This drives the cutter 15 to move downward and cut the tube in the cutting groove 122. After cutting, the fourth drive unit 17 drives the moving block 13 to move upward and reset. The cutting is convenient and quick.

[0025] like Figure 1-2 As shown, the inner wall of the preheating box 2 is provided with heat insulation cotton. In this embodiment, the inner wall of the preheating box 2 is provided with heat insulation cotton, and the heat insulation cotton is made of glass wool, which can reduce the heat loss inside the preheating box 2.

[0026] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A mandrel transfer and conveying mechanism, characterized in that: It includes a cutting assembly, a preheating box, a heating assembly, a mandrel, a first fixing assembly, a second fixing assembly, a clamping assembly, and a moving assembly; The mandrel is disposed inside the preheating box, and the front and rear ends of the mandrel protrude from the front and rear sides of the preheating box, respectively. The first fixing component and the second fixing component are used to alternately clamp and fix the mandrel. The cutting component is located on the front side of the preheating box. The cutting component is used to cut the pipe material. The heating component is used to heat the interior of the preheating box. The clamping component is used to clamp the pipe material. The moving component is used to drive the clamping component to move back and forth.

2. The mandrel transfer and conveying mechanism according to claim 1, characterized in that: The first fixing component includes a first mounting base, a first driving part, and a first clamping block; The first driving unit is mounted on the first mounting base, and the first clamping blocks are respectively mounted on the upper and lower output ends of the first driving unit. The first driving unit is used to drive the two first clamping blocks to move closer to each other or further away from each other.

3. The mandrel transfer and conveying mechanism according to claim 1, characterized in that: The second fixing component includes a second mounting base, a second drive unit, a fixing plate, a fixing block, a second clamping block, and a connecting rod; The top of the second mounting base is equipped with the fixing plate, the fixing block is installed on one end of the fixing plate, the middle parts of the upper and lower second clamping blocks are respectively hinged to the upper and lower ends of the fixing block, one end of the upper and lower second clamping blocks is respectively hinged to one end of the connecting rod, and the other end of the upper and lower second clamping blocks is provided with a second clamping groove. The second drive unit is mounted on the other end of the fixed plate, and the output shaft of the second drive unit passes through the fixed plate and is hinged to the other end of the two connecting rods.

4. The mandrel transfer and conveying mechanism according to claim 1, characterized in that: The moving component includes a moving base, a slider, a slide rail, a gear rail, a third drive unit, and gears; The slide rail and the gear rail are respectively located on the outside of the preheating box, and the slider is installed at the bottom of the movable seat, and the slider is slidably mounted on the slide rail; The third drive unit is mounted on the movable base, and the output end of the third drive unit is equipped with the gear, which meshes with the gear rail; The preheating box has a clearance groove on its side. The clamping assembly is installed on the movable base. The clamping end of the clamping assembly passes through the clearance groove and is placed inside the preheating box.

5. The mandrel transfer and conveying mechanism according to claim 4, characterized in that: It also includes a sealing strip, a connecting plate, a third mounting base, and a pulley; The two third mounting seats are respectively located on the outer sides of the front and rear ends of the preheating box. The two pulleys are rotatably mounted on the left and right ends of the third mounting seats. The two ends of the sealing strip are connected by the connecting plate. The sealing strip is wrapped around the four pulleys. The connecting plate is mounted on the clamping assembly. The sealing strip is directly opposite the clearance groove.

6. The mandrel transfer and conveying mechanism according to claim 5, characterized in that: It also includes a protective cover, the front and rear ends of which are respectively mounted on the two third mounting bases, and the protective cover is placed over the pulley.

7. The mandrel transfer and conveying mechanism according to claim 1, characterized in that: The heating assembly includes a hot air blower and a delivery pipe; The hot air blower is located below the preheating box, and the output end of the hot air blower is connected to the interior of the preheating box through the delivery pipe.

8. The mandrel transfer and conveying mechanism according to claim 1, characterized in that: The cutting assembly also includes a fourth mounting base, a cutting block, a moving block, a mounting plate, a cutter, a guide rod, and a fourth drive unit; The fourth mounting base is located on the front side of the first fixing component, the cutting block is mounted on the fourth mounting base, and the cutting block is provided with a through hole and a cutting groove, the through hole being directly opposite the core rod; The guide rod is mounted on the fourth mounting base, the movable block is mounted on the guide rod and can move up and down, the cutter is mounted on the movable block through the mounting plate, the cutter is facing the cutting groove, and the fourth driving unit is used to drive the movable block to move up and down.

9. A mandrel transfer and conveying mechanism according to claim 1, characterized in that: The inner wall of the preheating box is lined with insulation cotton.

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