A CNC foam cutting and processing machine

Abstract

This invention discloses a CNC foam cutting machine, relating to the field of foam cutting machines. It includes a main unit with lifting platforms on both sides capable of moving longitudinally and vertically. A translation belt for transversely conveying foam is located in the center. A connecting rod has a connecting cylinder detachably connected to both ends. The other end of the connecting cylinder is connected to a thermal resistance wire wound on the lifting platform. A conveying structure for transversely conveying the connecting rod is installed on the lifting platform. The end of the connecting rod can pass through the foam after separating from the connecting cylinder and then reconnect to it. This invention connects detachable thermal resistance wires to both ends of the connecting rod capable of penetrating the foam board. After cutting the outline of the foam model, the thermal resistance wire at one end of the metal rod is wound up, allowing the metal rod to penetrate the part to be cut, and then the wound-up thermal resistance wire is reconnected. This allows cutting of the hole at the center of the foam model without damaging it.

Description

Technical Field

[0001] This invention relates to the field of foam cutting and processing machines, specifically a CNC foam cutting and processing machine. Background Technology

[0002] A foam cutting machine is a specialized piece of equipment for processing lightweight chemical materials such as foam and sponge. It achieves precise cutting through heat, mechanical force, or laser technology and is often used to manufacture foam models for lost foam casting.

[0003] The relevant Chinese patent announcement number CN104858919B discloses a foam plastic cutting and molding machine for lost foam casting, including a machine body, a first cutting device, a second cutting device, and a hydraulic rod. The machine body is generally cubic in structure. The first cutting device is located at the upper part of the machine body, the second cutting device runs through the entire machine body, and the hydraulic rod is located between the machine body and the second cutting device.

[0004] Another related Chinese patent announcement, CN104690771B, discloses an automated foam cutting machine, including a control host and a heating wire. The control host has a first horizontal lead screw and a second horizontal lead screw on its two sides, respectively. The first and second horizontal lead screws are equipped with a first servo motor and a second servo motor for driving the first and second horizontal lead screws, respectively. The first and second horizontal lead screws are also equipped with a first horizontal ball bearing slider and a second horizontal ball bearing slider, respectively. The machine also includes a first vertical lead screw and a second vertical lead screw, respectively vertically mounted on the first and second horizontal ball bearing sliders. The first and second horizontal ball bearing sliders are also equipped with a third servo motor and a fourth servo motor, respectively.

[0005] Regarding the aforementioned technologies, existing CNC foam cutting machines that use thermal resistance wire cutting generally include two two-dimensional moving stages, with a thermal resistance wire for cutting foam connected between the two stages. The movement of the stages controls the thermal resistance wire to cut the foam on the worktable.

[0006] However, in existing technologies, the thermal resistance wire needs to remain connected to two moving stages. During the cutting of foam material, after the outer contour of a foam model is cut, when it is necessary to cut the holes inside the foam model, the thermal resistance wire needs to move to a position close to the hole to be cut on the outer contour of the foam model, cut the foam model, enter the cutting position, and after cutting the holes inside the foam model, it moves out along the original path. This process is repeated for subsequent foam model cutting, resulting in the thermal resistance wire leaving kerfs on the foam model. After the foam model is sliced ​​into layers, manual repair of the kerfs is required. In summary, existing CNC foam cutting machines cannot cut the holes inside the foam model without damaging it. Summary of the Invention

[0007] Based on this, the purpose of the present invention is to provide a CNC foam cutting machine to solve the technical problem that existing CNC foam cutting machines are unable to cut the holes in the foam model without damaging it.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a CNC foam cutting and processing machine, comprising a main unit, lifting platforms that can move longitudinally and vertically on both sides of the main unit, and a translation belt that can transport foam laterally in the middle, a connecting rod, and a connecting cylinder detachably connected to one end of each end of the connecting rod, the other end of the connecting cylinder being connected to a thermal resistance wire wound on the lifting platform, a conveying structure for laterally transporting the connecting rod being installed on the lifting platform, and the end of the connecting rod being able to pass through the foam after separating from the connecting cylinder and then reconnect to the connecting cylinder.

[0009] By adopting the above technical solution, detachable thermal resistance wires are connected to both ends of the connecting rod that can penetrate the foam board. After the outline of the foam model is cut, the thermal resistance wire at one end of the metal rod is wound up so that the metal rod penetrates the part to be cut. Then the wound thermal resistance wire is connected. This allows the hole at the center of the foam model to be cut without damaging the foam model.

[0010] The present invention is further configured such that both ends of the connecting rod are connected to a tapered connector, the connector is coaxially fixedly connected to a magnetic ring and can be inserted into the connecting cylinder, and the inner wall of the connecting cylinder is fixedly connected to an iron ring adapted to the magnetic ring.

[0011] Preferably, the magnetic attraction of the magnetic ring is used to engage with the iron ring inside the connecting cylinder, so as to achieve quick insertion of the connector and the connecting cylinder.

[0012] The present invention is further configured such that a threaded portion is provided on the conical surface of the connector, a fixed frame is installed in the middle of the lifting platform, a rotating ring coaxial with the connecting rod is rotatably installed in the fixed frame, a plurality of telescopic locking blocks for pressing the outer wall of the connecting rod are slidably connected to the inner wall of the rotating ring in the radial direction, and an end cap is rotatably connected to the end of the connecting cylinder, and the end cap is fixedly connected to the thermal resistance wire.

[0013] Preferably, when processing high-density foam raw materials, rotating the screw-in connecting rod allows the connecting rod to pass through the foam raw material without pushing it.

[0014] The present invention is further configured such that at least two sets of conveying wheels for conveying connecting rods are installed on the lifting platform, each set of conveying wheels can press against the outer wall of the connecting rod, the conveying wheels are installed on the sliding platform, the sliding platform is provided with a motor for driving the conveying wheels and is slidably connected to the fixed platform, and a compression spring in a compressed state is provided between the fixed platform and the sliding platform.

[0015] Preferably, a conveyor wheel is used to push the connecting rod through the foam material.

[0016] The present invention is further configured such that each set of conveyor wheels has a recessed portion on its outer wall in the circumferential direction, and is in contact with each other when not in contact with the connecting rod or connecting cylinder.

[0017] Preferably, the conveyor wheel is made to fully contact the connecting rod, thereby pressing the connecting rod together.

[0018] The invention is further configured such that each of the two lifting platforms is fixedly installed with a wire clamping box at one end close to the other. The wire clamping box is equipped with a telescopic column that can extend and retract radially along the connecting rod. The end of the telescopic column is fixedly connected with a pressure head for clamping the thermal resistance wire. A conductive sheet is fixedly connected inside the wire clamping box towards the pressure head. The conductive sheet is connected with a lug extending out of the wire clamping box.

[0019] Preferably, the telescopic column is extended to bring the pressure head closer to the conductive sheet, thereby pressing the thermal resistance wire onto the conductive sheet.

[0020] The present invention is further configured such that the conductive sheet has a V-shaped structure, the pressure head has an inclined surface adapted to the conductive sheet in the direction facing the conductive sheet, and a concave arc surface is provided at the front end.

[0021] Preferably, the thermal resistance wire can be pushed horizontally more effectively, and each fixation of the thermal resistance wire ensures that the thermal resistance wire is fixed in the same position, which facilitates the control of the movement of the lifting platform and thus accurately plans the cutting path of the thermal resistance wire.

[0022] The present invention is further configured such that the end of the connecting cylinder facing the thermal resistance wire has a tapered structure, and the pressure head is fixedly connected to a blocking block at the end away from the other lifting platform. The blocking block is provided with a recessed portion for adapting to the tapered structure at the end of the connecting cylinder.

[0023] Preferably, the connecting cylinder is positioned after being disengaged from the connecting rod by using a blocking block, which facilitates accurate connection of the end of the connecting rod to the connecting cylinder.

[0024] The invention is further configured such that each of the two lifting platforms is equipped with a take-up device for winding the thermal resistance wire at one end away from each other, and a first fixed pulley and a second fixed pulley are respectively installed below the take-up device on the lifting platform. The first fixed pulley and the second fixed pulley are both installed on the side of the lifting platform that is closer to the take-up device than the connecting rod.

[0025] Preferably, a take-up device is used to wind up the thermal resistance wire.

[0026] The invention is further configured such that both the first fixed pulley and the second fixed pulley are in the same vertical plane as the connecting rod, and the installation position of the second fixed pulley on the lifting platform is closer to the take-up device than that of the first fixed pulley.

[0027] Preferably, the thermal resistance wire should be kept away from interfering with the movement of the connecting rod.

[0028] The present invention is further configured such that a drive structure for driving the rotating ring to rotate is installed inside the fixed frame, and at least three telescopic blocks are provided inside the rotating ring, and each of them is provided with an arc-shaped recess for adapting to the outer wall of the connecting rod at one end facing the connecting rod. The telescopic blocks are also provided with rounded chamfers at both ends along the length of the connecting rod for contacting the connecting cylinder.

[0029] Preferably, the thermal resistance wire is kept in the same vertical plane as the connecting rod after passing over the first fixed pulley.

[0030] In summary, the present invention has the following main beneficial effects:

[0031] This invention connects detachable thermal resistance wires to both ends of a connecting rod that can penetrate the foam board. After the outline of the foam model is cut, the thermal resistance wire at one end of the metal rod is wound up, allowing the metal rod to penetrate the part to be cut. Then, the wound-up thermal resistance wire is connected again. This allows the hole at the center of the foam model to be cut without damaging the foam model.

[0032] This invention installs a translation belt on the main unit that can laterally transport foam raw materials. After the connecting rod penetrates the middle part of the foam model to be cut, the translation belt synchronously transports the foam raw materials and the connecting rod to the lifting platform for winding the heat resistance wire, so that the connecting rod can be smoothly connected to the connecting cylinder, thereby stably completing the step of transferring the connecting rod from one lifting platform to another.

[0033] This invention installs a fixed frame on a lifting platform, and uses a rotating ring inside the fixed frame to drive the connecting rod to rotate. At the same time, threads are provided on the joints connected to both ends of the connecting rod, so that the connecting rod can rotate and drill when it needs to penetrate high-density foam material, avoiding the connecting rod pushing the foam material during the penetration process and affecting the accuracy of subsequent cutting.

[0034] This invention uses a pressure head and a blocking block that are slidably connected together inside a pressure box, and uses a telescopic column to control the movement of the pressure head and the blocking block. By adjusting the extension and retraction of the telescopic column, the positioning of the thermal resistance wire and the connecting cylinder can be achieved respectively, which facilitates the rapid switching of the cutting position of the thermal resistance wire. Attached Figure Description

[0035] Figure 1 This is a perspective view of the present invention;

[0036] Figure 2 After the outer contour of a foam model is cut for this invention, a three-dimensional view of the foam model before holes are cut inside will be taken.

[0037] Figure 3 For the present invention Figure 2 Enlarged view of A in the middle;

[0038] Figure 4 This is a perspective view of the protective cover of the present invention after it has been removed;

[0039] Figure 5 For the present invention Figure 4 Enlarged view of B in the middle;

[0040] Figure 6 For the present invention Figure 4 Enlarged view of C;

[0041] Figure 7 This is a perspective view of the connecting cylinder of the present invention being snapped into the wire clamping box;

[0042] Figure 8 For the present invention Figure 7 Enlarged view of D;

[0043] Figure 9 This is a perspective view of the thermal resistance wire of the present invention being compressed.

[0044] Figure 10 For the present invention Figure 9 Enlarged view of E in the middle;

[0045] Figure 11 This is an exploded view of the connecting rod of the present invention;

[0046] Figure 12 For the present invention Figure 11 Enlarged view of F in the middle;

[0047] Figure 13 For the present invention Figure 11 Enlarged view of G in the middle;

[0048] Figure 14 This is a perspective view of the fixing frame of the present invention;

[0049] Figure 15 This is a schematic diagram of the cutting trajectory left by the thermal resistance wire on the foam material when it is necessary to cut circular holes in the foam model in the prior art;

[0050] Figure 16 This is a schematic diagram of a foam model after cutting circular holes in the prior art;

[0051] Figure 17 This is a schematic diagram of the cutting trajectory left by the thermal resistance wire on the foam material when it is necessary to cut circular holes in the foam model according to the present invention.

[0052] Explanation of reference numerals in the attached figures:

[0053] 1. Main unit; 2. Moving track; 3. Moving platform; 4. Lifting platform; 5. Translation belt; 6. Thermal resistance wire; 7. Connecting rod; 8. Connecting cylinder; 801. End cap; 802. Iron ring; 9. Connector; 901. Threaded part; 902. Magnetic ring; 10. Wire clamp box; 1001. Connector ear; 11. Conductive sheet; 12. Telescopic column; 13. Pressure head; 14. Blocking block; 15. Fixed platform; 16. Sliding platform; 17. Compression spring; 18. Conveying wheel; 19. Fixed frame; 20. Rotating ring; 21. Telescopic locking block; 22. First fixed pulley; 23. Second fixed pulley; 24. Wire take-up device; 25. Protective cover; 26. Foam raw material. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0055] The embodiments of the present invention will now be described.

[0056] First embodiment:

[0057] A CNC foam cutting machine, please refer to Figure 1-17 The system includes a main unit 1, with lifting platforms 4 on both sides that can move longitudinally and vertically, and a translation belt 5 in the middle that can transport foam laterally. Specifically, there are moving tracks 2 on both sides of the main unit 1, with a moving platform 3 arranged longitudinally in the moving track 2, and a lifting platform 4 arranged vertically on the moving platform 3. In this embodiment, the movement of the lifting platform 4 and the moving platform 3 is controlled by a servo motor.

[0058] It also includes a connecting rod 7, both ends of which are detachably connected to one end of a connecting cylinder 8. The other end of the connecting cylinder 8 is connected to a thermal resistance wire 6 wound on the lifting platform 4. Specifically, the part of the connecting cylinder 8 used to connect the thermal resistance wire 6 is made of high-temperature resistant insulating material to prevent the heat from the thermal resistance wire 6 after it is energized from being transferred to the connecting rod 7. The lifting platform 4 is equipped with a conveying structure for horizontally conveying the connecting rod 7. The end of the connecting rod 7 can pass through the foam after separating from the connecting cylinder 8 and then connect to the connecting cylinder 8.

[0059] For details regarding the above embodiments, please refer to [link / reference]. Figure 11-13Both ends of the connecting rod 7 are connected to a tapered connector 9. The tapered connector 9 can easily penetrate the low-density foam material 26. The connector 9 is coaxially fixedly connected to a magnetic ring 902 and can be inserted into the connecting cylinder 8. The inner wall of the connecting cylinder 8 is fixedly connected to an iron ring 802 that is compatible with the magnetic ring 902. The magnetic force of the magnetic ring 902 attracts and cooperates with the iron ring 802 in the connecting cylinder 8 to achieve quick insertion of the connector 9 and the connecting cylinder 8.

[0060] Furthermore, in order to enable the connecting cylinder 8 to penetrate the foam material 26 more smoothly and reduce the resistance of the connecting cylinder 8 moving within the foam material 26, in other undisclosed embodiments, the outer diameter of the connecting cylinder 8 can be the same as the outer diameter of the connecting rod 7, and a magnetic attraction structure is provided between the part of the connector 9 that penetrates into the connecting cylinder 8 and the inner wall of the connecting cylinder 8 to ensure a stable connection between the connecting rod 7 and the connecting cylinder 8.

[0061] For details regarding the above embodiments, please refer to [link / reference]. Figure 4-6 The lifting platform 4 is equipped with at least two sets of conveying wheels 18 for conveying the connecting rod 7. Each set of conveying wheels 18 can press against the outer wall of the connecting rod 7. Specifically, in this embodiment, a total of two sets of conveying wheels 18 are provided.

[0062] The conveyor wheel 18 is mounted on the sliding table 16, and the sliding table 16 is equipped with a motor for driving the conveyor wheel 18 and is slidably connected to the fixed table 15. Specifically, in this embodiment, in order to save axial space, the motor for driving the conveyor wheel 18 to rotate can be an axial flux motor. A compression spring 17 in a compressed state is provided between the fixed table 15 and the sliding table 16. The conveyor wheel 18 pushes the connecting rod 7 through the foam material 26, and the elastic force of the compression spring 17 makes the conveyor wheel 18 press the connecting rod 7.

[0063] For details regarding the above embodiments, please refer to [link / reference]. Figure 7-10 Each of the two lifting platforms 4 has a wire clamping box 10 fixedly installed at one end close to the other. The wire clamping box 10 has a telescopic column 12 that can extend and retract radially along the connecting rod 7. Specifically, in this embodiment, the telescopic column 12 can be an electric telescopic rod to facilitate control of the extension and retraction of the telescopic column 12.

[0064] The end of the telescopic column 12 is fixedly connected to a pressure head 13 for pressing the thermal resistance wire 6. The inside of the wire clamping box 10 is fixedly connected to a conductive sheet 11 facing the pressure head 13. The conductive sheet 11 is connected to a lug 1001 extending out of the wire clamping box 10. The lug 1001 is used to connect wires. By extending the telescopic column 12, the pressure head 13 is brought close to the conductive sheet 11, and the thermal resistance wire 6 is pressed onto the conductive sheet 11.

[0065] For details regarding the above embodiments, please refer to [link / reference]. Figure 7-10The end of the connecting cylinder 8 facing the thermal resistance wire 6 has a tapered structure. The pressure head 13 is fixedly connected to a blocking block 14 at the end away from the other lifting platform 4. The blocking block 14 is provided with a recessed part for adapting to the tapered structure at the end of the connecting cylinder 8. When the telescopic column 12 retracts to the appropriate position, the recessed part on the blocking block 14 corresponds to the end of the connecting cylinder 8. When the connecting cylinder 8 is blocked by the blocking block 14, the conductive sheet 11 and the pressure head 13 can simultaneously restrict the outer wall of the connecting cylinder 8.

[0066] Specifically, the recessed portion of the blocking block 14 will not block the thermal resistance wire 6, but it can match the end of the connecting cylinder 8 well. The blocking block 14 is used to position the connecting cylinder 8 after it is separated from the connecting rod 7, so that the end of the connecting rod 7 can be accurately connected to the connecting cylinder 8.

[0067] For details regarding the above embodiments, please refer to [link / reference]. Figure 1-6 Each of the two lifting platforms 4 has a take-up device 24 for winding the thermal resistance wire 6 at one end away from the other. Specifically, the length of the thermal resistance wire 6 wound in the take-up device 24 is greater than the width of the main unit 1. The lifting platform 4 has a first fixed pulley 22 and a second fixed pulley 23 installed below the take-up device 24. The first fixed pulley 22 and the second fixed pulley 23 are installed on the lifting platform 4 at a position closer to the take-up device 24 than the connecting rod 7. When the take-up device 24 is working, it can be used to wind the thermal resistance wire 6.

[0068] Second embodiment:

[0069] A CNC foam cutting machine, please refer to Figure 1-17 Based on the first embodiment, the difference from the first embodiment is that the conical surface of the connector 9 is provided with a threaded part 901. Specifically, the threaded part 901 is a threaded thread. A fixed frame 19 is installed in the middle of the lifting platform 4. A rotating ring 20 coaxial with the connecting rod 7 is rotatably installed in the fixed frame 19.

[0070] Furthermore, the inner wall of the rotating ring 20 is radially slidably connected with multiple telescopic blocks 21 for pressing the outer wall of the connecting rod 7. The end of the telescopic block 21 that does not contact the connecting rod 7 is provided with a spring. When the telescopic block 21 contacts the connecting rod 7, the spring will be further compressed, thereby enabling the telescopic block 21 to press the outer wall of the connecting rod 7. The end of the connecting cylinder 8 is rotatably connected with an end cap 801. Specifically, the end cap 801 is made of heat-resistant insulating material. The end cap 801 is rotatably connected to the connecting cylinder 8, which can effectively prevent the thermal resistance wire 6 from rotating due to the rotation of the connecting rod 7. The end cap 801 is fixedly connected to the thermal resistance wire 6. When processing high-density foam material 26, rotating and screwing the connecting rod 7 can facilitate the connecting rod 7 to pass through the foam material 26 without pushing the foam material 26.

[0071] Furthermore, in order to prevent the foam material 26 on the translation belt 5 from being pushed by the connecting rod 7, angle steel or other fixed structures for restricting the movement of the foam material 26 can be placed on both sides of the bottom end of the foam material 26 along the length direction of the foam material 26, so as to prevent the foam material 26 from moving relative to the translation belt 5, thereby ensuring the cutting accuracy of the thermal resistance wire 6.

[0072] For details regarding the above embodiments, please refer to [link / reference]. Figure 4-6 Each set of conveyor wheels 18 has a recessed portion on its outer wall along the circumference, and is in contact with each other when not in contact with the connecting rod 7 or the connecting cylinder 8, ensuring that the conveyor wheel 18 can fully contact the connecting rod 7 and thus press the connecting rod 7 tightly.

[0073] Third embodiment:

[0074] A CNC foam cutting machine, please refer to Figure 1-17 Based on the second embodiment, the difference from the second embodiment is that the conductive sheet 11 has a V-shaped structure, the pressure head 13 is provided with an inclined surface adapted to the conductive sheet 11 in the direction of the conductive sheet 11, and a concave arc surface is provided at the front end, which can better push the thermal resistance wire 6 horizontally. Each fixation of the thermal resistance wire 6 makes the thermal resistance wire 6 fixed to the same position, which facilitates the control of the movement of the lifting platform 4 and thus accurately plans the cutting path of the thermal resistance wire 6.

[0075] Furthermore, both the first fixed pulley 22 and the second fixed pulley 23 are in the same vertical plane as the connecting rod 7. The installation position of the second fixed pulley 23 on the lifting platform 4 is closer to the take-up device 24 than that of the first fixed pulley 22, so as to avoid the thermal resistance wire 6 interfering with the movement of the connecting rod 7. Furthermore, a protective cover 25 is also fixedly installed on the lifting platform 4. The protective cover 25 is used to protect the conveyor wheel 18, the fixed frame 19 and other components on the lifting platform 4.

[0076] For details regarding the above embodiments, please refer to [link / reference]. Figure 4-6 , Figure 14 The fixed frame 19 is equipped with a drive structure for driving the rotating ring 20 to rotate. Specifically, the drive structure can be a roller that contacts the outer wall of the rotating ring 20. Under the premise of using a motor to drive the roller to rotate, the friction between the roller and the outer wall of the rotating ring 20 drives the rotating ring 20 to rotate.

[0077] Specifically, at least three telescopic blocks 21 are provided inside the rotating ring 20, and each of them has an arc-shaped recess at the end facing the connecting rod 7 to fit the outer wall of the connecting rod 7, so as to better fit the outer wall of the connecting rod 7 and drive the connecting rod 7 to rotate. The telescopic blocks 21 also have rounded chamfers at both ends along the length of the connecting rod 7 for contacting the connecting cylinder 8. After the connecting cylinder 8 contacts the telescopic blocks 21, it will push them away from each other radially to avoid the telescopic blocks 21 blocking the movement of the connecting cylinder 8, so that the thermal resistance wire 6 can remain in the same vertical plane as the connecting rod 7 after passing over the first fixed pulley 22.

[0078] In the specific process of foam cutting and processing, the present invention states:

[0079] The foam material 26 is fixed on the translation belt 5 of the main unit 1. The two sets of lifting platforms 4 move to allow the thermal resistance wire 6 to enter the foam material 26. The thermal resistance wire 6 moves along the preset path to cut out the outer contour of the foam model. After the outer contour of the foam model is cut, the thermal resistance wire continues to move to the waste area of ​​the foam material 26. Without affecting the foam model, a small hole for the connecting cylinder 8 to pass through is cut in the waste area.

[0080] Then the telescopic column 12 retracts to release the restriction on the thermal resistance wire 6. Specifically, at this time, the telescopic column 12 on the lifting platform 4 without the connecting rod 7 retracts to the position where the blocking block 14 can engage the connecting cylinder 8, while the telescopic column 12 on the lifting platform 4 with the connecting rod 7 retracts completely to avoid blocking the movement of the connecting cylinder 8.

[0081] The take-up device 24 on the lifting platform 4 where the connecting rod 7 is located is temporarily not working, while the take-up device 24 on another lifting platform 4 is working, winding up the thermal resistance wire 6, causing the connecting cylinder 8 connected to the thermal resistance wire 6 to separate from the end of the connecting rod 7. During the continuous winding of the thermal resistance wire 6, the connecting cylinder 8 passes through the foam material 26 and continues to move towards the lifting platform 4, and finally gets stuck in the wire pressing box 10, with the opening of the connecting cylinder 8 facing the connecting rod 7.

[0082] The two lifting platforms 4 move synchronously, so that the end of the connecting rod 7 is toward the area of ​​the hole to be cut in the middle of the foam model. The translation belt 5 conveys the foam material 26 toward the connecting rod 7 until the foam material 26 is close to the connecting rod 7 and located at the edge of the translation belt 5.

[0083] The conveyor wheel 18 on the lifting platform 4 pushes the connecting rod 7 to penetrate the foam material 26. When the conveyor wheel 18 can no longer push the connecting rod 7, the connecting rod 7 is in a state of penetrating the foam material 26 and located inside the foam material 26. Then the translation belt 5 conveys the foam material 26 in the opposite direction, causing the end of the connecting rod 7 that is not connected to the connecting cylinder 8 to move toward the connecting cylinder 8 that is limited by the blocking block 14. When the connecting rod 7 is reconnected to the connecting cylinder 8, the telescopic column 12 that is not fully retracted continues to retract to a fully retracted state to avoid continuing to block the connecting cylinder 8.

[0084] The translation belt 5 continues to transport the foam material 26, causing the connecting rod 7 to continue moving. When the connecting rod 7 is inserted between the conveyor wheels 18, the translation belt 5 stops moving. The conveyor wheels 18 work to pull the connecting rod 7 out of the foam material 26 and continue to transport it until the connecting rod 7 and the connecting cylinder 8 are completely away from the position of the wire pressing box 10. Then the telescopic columns 12 in the two wire pressing boxes 10 extend synchronously, pressing the thermal resistance wire 6 onto the conductive sheet 11. At this time, the work of cutting holes in the middle of the foam model can begin.

[0085] Similarly, when it is necessary to cut the next foam model on the foam material 26, it is only necessary to cut a round hole in the middle of the cut waste material for the connecting cylinder 8 to pass through, and repeat the above steps. In this way, it is possible to easily cut the hole in the center of the foam model without destroying the foam model.

[0086] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A CNC foam cutting and processing machine, characterized in that, include: The main unit has lifting platforms on both sides that can move longitudinally and vertically, and a translation belt in the middle that can transport foam laterally. A connecting rod has a connecting cylinder detachably connected to one end at each end. The other end of the connecting cylinder is connected to a heat-resistant wire wound on a lifting platform. A conveying structure for laterally conveying the connecting rod is installed on the lifting platform. The end of the connecting rod can pass through foam and reconnect to the connecting cylinder after separation. Both ends of the connecting rod are connected to a tapered connector. A magnetic ring is coaxially fixedly connected to the connector and can be inserted into the connecting cylinder. An iron ring adapted to the magnetic ring is fixedly connected to the inner wall of the connecting cylinder. A threaded portion is provided on the tapered surface of the connector. A fixing frame is installed in the middle of the lifting platform. A rotating ring coaxial with the connecting rod is rotatably installed in the fixing frame. Multiple rings for pressing the outer wall of the connecting rod are slidably connected radially to the inner wall of the rotating ring. The telescopic locking block has an end cap rotatably connected to the end of the connecting cylinder, which is fixedly connected to the thermal resistance wire. Two lifting platforms are each fixedly equipped with a wire pressing box at their respective ends, and a telescopic column capable of radial extension and retraction along the connecting rod is installed inside the wire pressing box. A pressure head for pressing the thermal resistance wire is fixedly connected to the end of the telescopic column. A conductive sheet is fixedly connected inside the wire pressing box towards the pressure head, and the conductive sheet is connected to an ear extending out of the wire pressing box. Two lifting platforms are each equipped with a take-up device for winding the thermal resistance wire at their respective ends, and a first fixed pulley and a second fixed pulley are respectively installed below the take-up device on the lifting platform. The first and second fixed pulleys are both positioned on the lifting platform closer to the take-up device than the connecting rod.

2. The CNC foam cutting machine according to claim 1, characterized in that: At least two sets of conveyor wheels for conveying connecting rods are installed on the lifting platform. Each set of conveyor wheels can press against the outer wall of the connecting rod. The conveyor wheels are installed on a sliding platform. A motor for driving the conveyor wheels is provided on the sliding platform and is slidably connected to a fixed platform. A compression spring in a compressed state is provided between the fixed platform and the sliding platform.

3. The CNC foam cutting machine according to claim 2, characterized in that: Each set of conveyor wheels has a recessed portion on its outer wall along the circumference, and they are in contact with each other when not in contact with the connecting rod or connecting cylinder.

4. The CNC foam cutting machine according to claim 1, characterized in that: The conductive sheet has a V-shaped structure, and the pressure head has an inclined surface that matches the conductive sheet in the direction facing the conductive sheet, and a concave arc surface is provided at the front end.

5. The CNC foam cutting machine according to claim 1, characterized in that: The end of the connecting cylinder facing the thermal resistance wire has a tapered structure, and the pressure head is fixedly connected to a blocking block at the end away from the other lifting platform. The blocking block is provided with a recessed portion for adapting to the tapered structure at the end of the connecting cylinder.

6. The CNC foam cutting machine according to claim 1, characterized in that: Both the first and second fixed pulleys are in the same vertical plane as the connecting rod. The second fixed pulley is installed closer to the take-up device on the lifting platform than the first fixed pulley.

7. The CNC foam cutting machine according to claim 1, characterized in that: The fixed frame is equipped with a drive structure for driving the rotating ring to rotate. At least three telescopic blocks are provided inside the rotating ring, and each block has an arc-shaped recess at one end facing the connecting rod to fit the outer wall of the connecting rod. The telescopic blocks also have rounded chamfers at both ends along the length of the connecting rod to contact the connecting cylinder.

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