Blade heating device and cutting machine with same

Abstract

The utility model relates to the technical field of pipe cutting, in particular to a blade heating device and a cutting machine with the same, and the blade heating device comprises a shell with a cavity, and a sheath, a support and a resistance wire which are sequentially sleeved in the shell from outside to inside, a fan is further arranged in the shell and located at the bottom of the resistance wire, air channels are formed in the resistance wire, between the resistance wire and the support and between the support and the sheath, an air outlet is formed in the top of the shell, and the air outlet is communicated with the air channels. The utility model aims to overcome the defect that the existing heating device is not suitable for heating the blade, and provides the blade heating device and the cutting machine with the same, the heating device can be arranged on the cutting machine, and the blade can be heated and can be heated in a non-contact manner through the non-contact heating of the heating device and the blade. And moreover, the heating device does not need to be detached and replaced along with the blade.

Description

Technical Field

[0001] This utility model relates to the field of pipe cutting technology, and more specifically, to a blade heating device and a cutting machine having the heating device. Background Technology

[0002] The production process of PVC pipes involves heating, plasticizing, and extruding the raw materials in a PVC extruder using a screw. The pipes then pass through a sizing sleeve and a water tank for cooling. After inkjet or laser marking, they are driven by a belt conveyor and cut to a fixed length by a cutting machine. Finally, they are lifted into a storage cage by an elevator, completing the entire production process. The cutting machine is a crucial step in the pipe finishing process; the shape, roughness, and aesthetics of the finished PVC pipe ends directly impact product quality and the satisfaction of distributors and customers.

[0003] Currently, due to adjustments in PVC pipe formulations and changes in winter temperatures, PVC pipe ends often exhibit burrs, roughness, and visible imperfections. To address these issues, heating the cutting machine blade to the Vicat softening temperature of the PVC pipe (approximately 82°C) can achieve a more aesthetically pleasing cut. However, current PVC pipe cutting machines lack blade heating devices. Conventional heating devices (such as ordinary electric heating wire heaters), if directly mounted on the blade, present several problems: firstly, securing the heating device to the blade is difficult; secondly, blades frequently wear out and require replacement, necessitating disassembly and reinstallation of the heating device – a cumbersome process. Therefore, existing heating devices are unsuitable for blade heating. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing heating devices that are not suitable for heating blades, and to provide a blade heating device and a cutting machine with the heating device. By installing the heating device on the cutting machine, non-contact heating of the blade can be achieved, and the installation of the heating device is convenient, without the need to disassemble and replace it along with the blade.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A blade heating device is provided, comprising a housing with a cavity, a sheath, a bracket, and a resistance wire sequentially fitted inside the housing from the outside to the inside, a fan being installed inside the housing and at the bottom of the resistance wire, air ducts being formed inside the resistance wire, between the resistance wire and the bracket, and between the bracket and the sheath, and an air outlet being provided at the top of the housing, the air outlet being connected to the air ducts.

[0007] The blade heating device of this utility model provides heat energy through resistance wire heating, and uses a fan to transfer the heat to the blade through the air duct and air outlet. It adopts the non-contact heating principle of air heating, which enables the blade to be heated and improves the cutting effect on pipes. At the same time, the blade heating device can be installed on the cutting machine through the housing, which not only facilitates the installation and fixation of the blade heating device, but also allows it to be set independently of the blade, without the need to disassemble, replace and reinstall it along with the blade, which greatly saves labor costs.

[0008] Furthermore, the resistance wire consists of multiple wires, which are evenly distributed circumferentially, with adjacent wires abutting against each other. The outer side of each resistance wire also abuts against the inner wall of the support. The arrangement of multiple resistance wires facilitates the fixing of the wires to each other and to the support, and also helps to improve heating efficiency.

[0009] Furthermore, the bracket has multiple limiting protrusions evenly distributed circumferentially on its outer side. These limiting protrusions enhance the fixation effect between the bracket and the sheath.

[0010] Furthermore, the sheath is made of stainless steel, and the housing is made of insulating, high-temperature resistant material. The housing serves as an outer protective layer, providing installation space for the resistance wire and facilitating installation and fixation with the cutting machine; the sheath also acts as a heat insulator, protecting the housing and preventing thermal damage.

[0011] Furthermore, it also includes an air nozzle with an air outlet channel connected to the air outlet. Using the air nozzle to heat the blade improves the heating effect.

[0012] Furthermore, the air nozzle has an L-shaped structure. The L-shaped air nozzle facilitates the installation and fixation of the blade heating device, and also facilitates the heating of the blade.

[0013] This utility model also provides a cutting machine, including a frame, a rotary cutting mechanism with blades, a blade heating device as described above, and a conductive slip ring. The rotary cutting mechanism is rotatably connected to the frame, the blade heating device is installed on the rotary cutting mechanism and acts on the blade, the conductive slip ring is sleeved on the end of the rotary cutting mechanism and partially connected to the frame, and the blade heating device is also electrically connected to the conductive slip ring.

[0014] The frame of this utility model is used to install and fix the rotary cutting mechanism. By installing the blade heating device on the rotary cutting mechanism, the blade heating device can rotate together with the rotary cutting mechanism and the blade. The blade heating device is powered by a conductive slip ring, so that the blade heating device can always keep heating the blade.

[0015] Furthermore, the conductive slip ring includes an outer ring, an inner ring, and a connecting assembly. The rotary cutting mechanism includes a bushing and a cutting mechanism with a blade. The bushing is rotatably connected to the frame and has a window. The cutting mechanism is mounted on the bushing, and the blade is located at the window. The inner ring and the outer ring are sequentially fitted onto the outside of the bushing. The inner ring is electrically connected to the outer ring through the connecting assembly. The outer ring is also fixedly connected to the frame. The blade heating device is electrically connected to the inner ring. When cutting pipes, the pipe is passed through the bushing, and the bushing drives the cutting mechanism to rotate. The blade acts on the pipe through the window to cut it. Simultaneously, the heating device heats the blade, improving the cutting effect on the pipe.

[0016] Furthermore, the connecting assembly includes a fixing frame, a pin, and a ball bearing. The fixing frame is fixedly connected to the inner ring. Both the inner side of the outer ring and the outer side of the inner ring have receiving grooves for accommodating the ball bearing. The pin is installed between the outer ring and the inner ring, passes through the ball bearing, and is connected to the fixing frame. The ball bearing is located within the receiving groove. The ball bearing can rotate around the pin. The fixing frame is used to install and fix the pin. The outer ring can be connected to a power source. The ball bearing connects the outer ring and the inner ring electrically. Power is then supplied to the resistance wire through the electrical connection between the inner ring and the blade heating device.

[0017] Furthermore, both the outer ring and the inner ring are made of conductive material, and the surfaces of both the outer ring and the inner ring outside the receiving groove are covered with an insulating layer. The insulating layer provides insulation between the outer and inner ring surfaces, thus offering safety protection.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This invention employs air-cooled heating to blow out hot air and heat the blade to a suitable temperature, thereby improving the cutting effect of the pipe end face, reducing burrs and roughness, and increasing aesthetics. Moreover, the heating device can be fixed on the cutting machine in a limited space, which facilitates the installation and fixation of the heating device, and it can be set independently of the blade, eliminating the need for disassembly, replacement, and reinstallation along with the blade, thus greatly saving labor costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of a blade heating device according to the present invention;

[0021] Figure 2 for Figure 1 AA section view;

[0022] Figure 3 for Figure 1 BB cross-sectional view;

[0023] Figure 4 This is a schematic diagram of the structure of a cutting machine according to the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the conductive slip ring of this utility model;

[0025] Figure 6 for Figure 5 CC section view.

[0026] The markings in the diagram are explained below:

[0027] 1. Housing; 2. Sheath; 3. Bracket; 31. Limiting protrusion; 4. Resistance wire; 5. Fan; 6. Air duct; 7. Air nozzle; 8. Air outlet; 9. Blade; 10. Outer ring; 101. Outer ring terminal; 11. Inner ring; 111. Inner ring terminal; 12. Connecting assembly; 121. Fixing bracket; 122. Pin; 123. Ball bearing; 13. Receiving groove; 14. Bushing; 15. Cutting mechanism; 1001. Frame; 1002. Rotary cutting mechanism; 1003. Blade heating device; 1004. Conductive slip ring; 1005. Pipe. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0029] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they 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. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0030] Example 1

[0031] like Figures 1 to 3The present invention provides an embodiment of a blade heating device, comprising a housing 1 with a cavity, a sheath 2, a bracket 3, and a resistance wire 4 sequentially fitted inside the housing 1 from the outside to the inside, a fan 5 installed inside the housing 1 and located at the bottom of the resistance wire 4, and air ducts 6 formed inside the resistance wire 4, between the resistance wire 4 and the bracket 3, and between the bracket 3 and the sheath 2, and an air outlet 8 provided at the top of the housing 1, which is connected to the air ducts 6.

[0032] This utility model's blade heating device provides heat energy through the heating of resistance wire 4. A fan 5 transfers the heat to the blade 9 via air duct 6, air outlet 8, and air outlet channel. Employing a non-contact heating principle, the blade 9 is heated, improving the cutting effect on pipes. Simultaneously, the blade heating device can be installed on the cutting machine through the housing 1, facilitating its installation and fixation. It can also be set independently of the blade 9, eliminating the need for disassembly, replacement, and reinstallation, significantly saving labor costs. The number of resistance wires 4 in this utility model is not limited to one. By placing the resistance wire 4 inside the bracket 3, the outer side of the resistance wire 4 is tightly fitted to the inner side of the bracket 3, the outer side of the bracket 3 is tightly fitted to the inner side of the sheath 2, and the outer side of the sheath 2 is tightly fitted to the inner side of the housing 1. This ensures reliable installation of all components within the blade heating device and prevents movement or displacement between components during use. The fan 5 is used to increase the airflow between the air ducts 6. An air inlet is provided at the bottom of the housing 1 on the side of the fan 5 away from the resistance wire 4. After the outside air enters the air duct 6 through the fan 5, it is heated by the resistance wire 4 and flows out from the air outlet 8 to heat the blade 9.

[0033] In one embodiment of this utility model, there are multiple resistance wires 4, which are evenly distributed circumferentially, with adjacent resistance wires 4 abutting against each other, and the outer side of each resistance wire 4 also abutting against the inner wall of the support 3. The arrangement of multiple resistance wires 4 facilitates the fixing of the resistance wires 4 to each other and to the support 3, and also helps to improve heating efficiency. When there are two resistance wires 4, they are symmetrically arranged about the central axis of the housing 1; when there are three or more resistance wires 4, they are evenly distributed circumferentially.

[0034] In one embodiment of this utility model, multiple limiting protrusions 31 are evenly distributed circumferentially on the outer side of the bracket 3. The limiting protrusions 31 are used to enhance the fixing effect between the bracket 3 and the sheath 2. Preferably, the limiting protrusions 31 are arc-shaped structures. The limiting protrusions 31 achieve contact between the bracket 3 and the sheath 2 to fix the bracket 3. This not only ensures the stable installation of the bracket 3, but also avoids excessive friction between the bracket 3 and the sheath 2, increasing the convenience of installation and disassembly.

[0035] In one embodiment of this utility model, the sheath 2 is made of stainless steel, and the shell 1 is made of an insulating, high-temperature resistant material. The shell 1 serves as an outer protective layer, providing installation space for the resistance wire 4 and facilitating installation and fixation with the cutting machine; the sheath 2 provides heat insulation, protecting the shell 1 and preventing thermal damage. Within the technical knowledge of those skilled in the art, the sheath 2 can also be made of other materials used for heat insulation and protection.

[0036] As one embodiment of this utility model, it also includes an air nozzle 7 with an air outlet channel connected to an air outlet 8. Using the air nozzle 7 to heat the blade 9 improves the heating effect. The air nozzle 7 can concentrate the airflow to maximize heat concentration and enhance the heating effect on the blade 9.

[0037] In one embodiment of this utility model, the air nozzle 7 has an L-shaped structure. The L-shaped air nozzle 7 facilitates the installation and fixation of the blade heating device, and also facilitates the heating of the blade 9. The nozzle 7 faces the blade 9 to heat the blade 9 by blowing air.

[0038] Example 2

[0039] like Figure 4 The first embodiment of the cutting machine of this utility model is shown, including a frame 1001, a rotary cutting mechanism 1002 with a blade 9, a blade heating device 1003 as described above, and a conductive slip ring 1004. The rotary cutting mechanism 1002 is rotatably connected to the frame 1001. The blade heating device 1003 is installed on the rotary cutting mechanism 1002 and acts on the blade 9. The conductive slip ring 1004 is sleeved on the end of the rotary cutting mechanism 1002 and partially connected to the frame 1001. The blade heating device 1003 is also electrically connected to the conductive slip ring 1004.

[0040] The frame 1001 of this invention is used to mount and fix the rotary cutting mechanism 1002. By mounting the blade heating device 1003 on the rotary cutting mechanism 1002, the blade heating device 1003 can rotate together with the rotary cutting mechanism 1002 and the blade 9. Power is supplied to the blade heating device 1003 via a conductive slip ring 1004, ensuring that the blade heating device 1003 continuously heats the blade 9. In this embodiment, the conductive slip ring 1004 can be a conventional conductive slip ring, as long as it provides power to the blade heating device 1003.

[0041] Example 3

[0042] The following is a second embodiment of a cutting machine according to the present invention. This embodiment is similar to embodiment 1, except that, as Figure 5 and Figure 6As shown, the conductive slip ring 1004 includes an outer ring 10, an inner ring 11, and a connecting assembly 12. The rotary cutter mechanism 1002 includes a bushing 14 and a cutter mechanism 15 with a blade 9. The bushing 14 is rotatably connected to the frame 1001. The bushing 14 has a window. The cutter mechanism 15 is mounted on the bushing 14. The blade 9 is located at the window. The inner ring 11 and the outer ring 10 are sequentially fitted onto the bushing 14. The inner ring 11 is electrically connected to the outer ring 10 through the connecting assembly 12. The outer ring 10 is also fixedly connected to the frame 1001. The blade heating device 1003 is electrically connected to the inner ring 11.

[0043] When cutting the pipe 1005, the pipe 1005 is passed through the bushing 14. The bushing 14 drives the cutting mechanism 15 to rotate, and the blade 9 acts on the pipe 1005 through the window to cut the pipe 1005. At the same time, the blade heating device 1003 heats the blade 9 to improve the cutting effect on the pipe 1005. The pipe 1005 is cut by rotating around it.

[0044] In one embodiment of this utility model, the connecting assembly 12 includes a fixing frame 121, a pin 122, and a ball bearing 123. The fixing frame 121 is fixedly connected to the inner ring 11. The inner side of the outer ring 10 and the outer side of the inner ring 11 are both provided with receiving grooves 13 for accommodating the ball bearing 123. The pin 122 is installed between the outer ring 10 and the inner ring 11, passes through the ball bearing 123, and is connected to the fixing frame 121. The ball bearing 123 is located within the receiving groove 13. The ball bearing 123 can rotate around the pin 122. The fixing frame 121 is used to install and fix the pin 122. The outer ring 10 can be connected to a power source. The ball bearing 123 connects the outer ring 10 and the inner ring 11 electrically. Power is then supplied to the resistance wire 4 through the electrical connection between the inner ring 11 and the blade heating device 1003. Preferably, both the outer ring 10 and the inner ring 11 are made of metal for easy conductivity. Preferably, the outer ring 10 is provided with an outer ring terminal 101, and the inner ring 11 is provided with an inner ring terminal 111. The resistance wire 4 of the blade heating device 1003 can be electrically connected to the inner ring terminal 111 through a wire, and then the outer ring 10 and the inner ring 11 are electrically connected by the ball bearing 123. The outer ring terminal 101 is then connected to the power supply, thereby enabling the blade heating device 1003 to be powered.

[0045] In one embodiment of this utility model, both the outer ring 10 and the inner ring 11 are made of conductive material, and the surfaces of both the outer ring 10 and the inner ring 11 outside the receiving groove 13 are covered with an insulating layer. The insulating layer can insulate the outer ring 10 and the inner ring 11 from each other, thus providing a safety protection function.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A blade heating device, characterized in that, The device includes a housing (1) with a cavity, a sheath (2), a bracket (3), and a resistance wire (4) which are sequentially fitted inside the housing (1) from the outside to the inside. A fan (5) is also installed inside the housing (1) and at the bottom of the resistance wire (4). Air ducts (6) are formed inside the resistance wire (4), between the resistance wire (4) and the bracket (3), and between the bracket (3) and the sheath (2). An air outlet (8) is provided at the top of the housing (1), and the air outlet (8) is connected to the air duct (6).

2. The blade heating device according to claim 1, characterized in that, The resistance wire (4) consists of multiple wires, which are evenly distributed circumferentially, and adjacent resistance wires (4) abut against each other. The outer side of the resistance wire (4) also abuts against the inner wall of the support (3).

3. The blade heating device according to claim 1, characterized in that, The bracket (3) has multiple limiting protrusions (31) evenly distributed circumferentially on its outer side.

4. The blade heating device according to claim 1, characterized in that, The sheath (2) is made of stainless steel, and the shell (1) is made of insulating and high-temperature resistant material.

5. The blade heating device according to claim 1, characterized in that, It also includes an air nozzle (7) with an air outlet channel, which is connected to the air outlet (8).

6. The blade heating device according to claim 1, characterized in that, The air nozzle (7) has an L-shaped structure.

7. A cutting machine, characterized in that, The device includes a frame (1001), a rotary cutting mechanism (1002) with a blade (9), a blade heating device (1003) as described in any one of claims 1 to 6, and a conductive slip ring (1004). The rotary cutting mechanism (1002) is rotatably connected to the frame (1001). The blade heating device (1003) is mounted on the rotary cutting mechanism (1002) and acts on the blade (9). The conductive slip ring (1004) is sleeved on the end of the rotary cutting mechanism (1002) and partially connected to the frame (1001). The blade heating device (1003) is also electrically connected to the conductive slip ring (1004).

8. The cutting machine according to claim 7, characterized in that, The conductive slip ring (1004) includes an outer ring (10), an inner ring (11), and a connecting assembly (12). The rotary cutter mechanism (1002) includes a bushing (14) and a cutter mechanism (15) with a blade (9). The bushing (14) is rotatably connected to the frame (1001). The bushing (14) has a window. The cutter mechanism (15) is mounted on the bushing (14). The blade (9) is located at the window. The inner ring (11) and the outer ring (10) are sequentially sleeved on the bushing (14). The inner ring (11) is electrically connected to the outer ring (10) through the connecting assembly (12). The outer ring (10) is also fixedly connected to the frame (1001). The blade heating device (1003) is electrically connected to the inner ring (11).

9. The cutting machine according to claim 8, characterized in that, The connecting assembly (12) includes a fixing frame (121), a pin (122), and a ball (123). The fixing frame (121) is fixedly connected to the inner ring (11). The inner side of the outer ring (10) and the outer side of the inner ring (11) are provided with receiving grooves (13) for accommodating the ball (123). The pin (122) is installed between the outer ring (10) and the inner ring (11) and passes through the ball (123) before being connected to the fixing frame (121). The ball (123) is located in the receiving groove (13).

10. The cutting machine according to claim 9, characterized in that, Both the outer ring (10) and the inner ring (11) are made of conductive material, and the outer ring (10) and the inner ring (11) outside the receiving groove (13) are covered with an insulating layer.

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