Composite smoke tube extrusion device and method

Abstract

The invention relates to the technical field of smoke pipe forming, and particularly discloses a composite smoke pipe extrusion device and method.The composite smoke pipe extrusion device comprises a rack, a mold system and a feeding mechanism, a feeding conveying belt and a discharging conveying belt are arranged on the two sides of the rack correspondingly, the mold system is used for extruding a metal pipe, and therefore a wavy structure is formed; the feeding mechanism comprises supporting rods, a driving mechanism, a sliding seat and a shifting plate, the two supporting rods are distributed on the rack in parallel at intervals and used for supporting metal pipes, the driving mechanism comprises a lead screw and a driving motor, the lead screw is rotationally matched with the rack, the driving motor is connected with the lead screw, the sliding seat is in threaded fit with the lead screw, and the shifting plate is arranged on the sliding seat. The lead screw is used for driving the sliding seat to be close to or away from the mold system, and the shifting plate is arranged on the sliding seat and used for pushing the metal pipe on the supporting rod into the mold system; according to the composite smoke pipe extrusion device and method, automatic feeding of metal pipes can be achieved through the feeding mechanism, manpower is saved, and safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cigarette tube forming, and in particular to a composite cigarette tube extrusion device and method. Background Art

[0002] The foldable composite smoke pipe is a pipe used in ventilation or smoke exhaust systems. It is mainly composed of multiple layers of different materials, usually including an inner layer, an outer layer, and a functional layer such as heat insulation or thermal insulation in the middle. Its shape is folded, similar to the bellows structure of an accordion. This folding structure allows the smoke pipe to be flexibly stretched and bent during installation and use to adapt to different space layouts and installation requirements.

[0003] The metal tube corrugation machine is a device used to process corrugations on the surface of metal tubes. The basic principle is to apply periodic pressure to the metal tube through the mold to cause local plastic deformation of the tube, thus forming a wave shape. This corrugation can increase the strength of the metal tube, improve its flexibility or be used for other special purposes such as connection.

[0004] In the production process of foldable composite cigarette pipes, a wave making machine is needed to first make waves on the inner layer. The wave making material is usually a stainless steel round tube. After the wave making is completed, the functional layer and the outer layer are tightly fitted together with the inner layer.

[0005] A Chinese patent application with application publication number CN107088599A discloses a stainless steel pipe corrugating machine, which includes: a frame, a fixed frame arranged on the frame, a hollow propulsion cylinder is arranged in the fixed frame, the output end of the hollow propulsion cylinder is connected to a wave making mold, a mold plate on the outside of the wave making mold is connected to the fixed frame, the right end of the wave making mold is connected to a rear propulsion plate, a lateral clamping cylinder is arranged on the outside of the wave making mold, and an auxiliary guide column is arranged at the rear end of the hollow propulsion cylinder, and the auxiliary guide column is arranged horizontally with the processing pipe and the hollow propulsion cylinder.

[0006] The above patent application document reduces the vibration of the tube body during the wave-making process and ensures that the tube body is not easily deformed.

[0007] However, the above patent application documents need to be loaded manually, which has high labor costs and certain risks. Summary of the invention

[0008] The present invention provides a composite cigarette tube extrusion device and method, aiming to solve the problem of manual feeding in the related art.

[0009] The composite cigarette tube extrusion device of the present invention comprises: a frame, a mold system and a feeding mechanism; A feeding conveyor belt and a discharging conveyor belt are respectively arranged on both sides of the frame; The die system is used to extrude the metal tube to form a wavy structure; The feeding mechanism includes a support rod, a driving mechanism, a sliding seat and a paddle. The two support rods are parallelly and spaced apart on the frame. The support rod is used to support the metal tube. The driving mechanism includes a lead screw and a driving motor. The lead screw is rotatably engaged on the frame. The driving motor is connected to the lead screw. The sliding seat is threadedly engaged on the lead screw. The lead screw is used to drive the sliding seat to approach or move away from the mold system. The paddle is provided on the sliding seat. The paddle is used to push the metal tube on the support rod into the mold system.

[0010] Beneficial effects: The feeding conveyor belt delivers the metal tube to between the two support rods, and the sliding seat is driven to move by the driving mechanism. The paddle plate moves synchronously with the sliding seat, and the paddle plate can stop at the end of the metal tube and push the metal tube along the support rod into the mold system, thereby realizing automatic loading.

[0011] Preferably, the mold system includes an upper mold, a lower mold and a mold core, the upper mold is slidably fitted on the frame, the frame is provided with a first driving member, the first driving member is used to drive the upper mold to move, the frame is provided with a second driving member, the second driving member is used to drive the lower mold to move, the frame is also provided with a positioning column, the mold core is arranged on the positioning column, and the mold core is used to support the metal tube.

[0012] The effect is that the mold core is used to open the metal tube so that an annular protrusion is formed on the metal tube, and the upper mold and the lower mold are used to squeeze the annular protrusion on the metal tube and shape the annular protrusion on the metal tube into a desired wave-like structure.

[0013] Preferably, the lower mold includes a mold frame, a first template and a second template, the mold frame is slidably fitted on the frame, the first template and the second template are both slidably fitted on the mold frame, and a third driving member and a fourth driving member are provided on the mold frame, the third driving member is connected to the first template, and the fourth driving member is connected to the second template.

[0014] The effect is that when extruding the annular protrusion on the metal tube, the first template and the second template stop against the end of the annular protrusion on the metal tube, and the upper mold extrude the annular protrusion on the metal tube from the other side. At this time, the first template and the second template can fix the metal tube. After the extrusion is completed, the first template and the second template are driven away from each other by the third driving member and the fourth driving member, and then the second driving member drives the mold frame to cross the shaped annular protrusion, and the first template and the second template come to the other side of the shaped annular protrusion, and approach each other and stop under the drive of the third driving member and the fourth driving member. At this time, the second driving member drives the mold frame to reset, and the first template and the second template push the metal tube to move, thereby realizing the feeding of the metal tube.

[0015] Preferably, the mold core includes a plurality of mold flaps, a driving rod and a fifth driving member, the positioning column is a hollow structure, the fifth driving member is arranged in the positioning column, the driving rod is connected to the fifth driving member, the plurality of mold flaps are continuously distributed along the circumference of the driving rod, the plurality of mold flaps can be assembled to form an annular structure, each mold flap is connected to the positioning column through a first elastic member, the end of the driving rod is in a truncated cone shape, and the driving rod can drive the mold flaps to expand.

[0016] The effect is that when the fifth driving member drives the truncated cone-shaped structure of the driving rod to approach the mold flap, the truncated cone-shaped structure on the driving rod stops at the mold flap and pushes the mold flap to open. The opening of the mold flap can squeeze the metal tube from the inside to the outside, thereby forming an annular protrusion on the side wall of the metal tube. When the fifth driving member drives the truncated cone-shaped structure of the driving rod to move away from the mold flap, the mold flap is reset under the action of the first elastic member.

[0017] Preferably, an adjustment mechanism is also provided on the support rod, and the adjustment mechanism includes a movable rod, an adjusting gear, a first connecting rod and a second connecting rod. The movable rod is slidably fitted on the mold frame, and a second elastic member is provided between the movable rod and the mold frame. The top end of the movable rod can stop against the metal pipe, and the adjusting gear is rotatably fitted on the frame. The bottom end of the movable rod is meshed with the adjusting gear, and the first connecting rod and the second connecting rod are both meshed with the adjusting gear. The top ends of the first connecting rod and the second connecting rod are respectively connected to the two support rods.

[0018] The effect is that the support rod can support the metal tube, thereby preventing the metal tube from being too long and causing the end away from the mold system to tilt downward. The movable rod always stops at the bottom end of the metal tube during the forming process. When the mold system extrude the metal tube, the outer contour diameter of the metal tube increases and pushes the movable rod to move downward. The movable rod drives the adjusting gear to rotate, and the adjusting gear drives the two support rods to move away from each other through the first connecting rod and the second connecting rod, so that the two support rods can adapt to the metal tube with increased outer diameter.

[0019] Preferably, the shift plate includes a first plate and a second plate, the top end of the first plate is rotatably connected to the second plate, the bottom end of the first plate is provided with a connecting plate, one end of the connecting plate is provided with a flange, and the other end of the connecting plate is connected to the sliding seat through a third elastic member, the connecting plate is slidably matched with the sliding seat, the adjusting mechanism is provided with a shift rod, the shift rod is stopped against the corresponding flange, the sliding seat is provided with a fixing rod, the first plate is rotatably matched with a driving gear, the driving gear is meshed with the fixing rod, the first plate is slidably matched with a limiting plate, and the limiting plate is meshed with the driving gear.

[0020] Preferably, a material unloading mechanism is also provided under the frame, and the material unloading mechanism includes a lifting mechanism and a push block, and the lifting mechanism is used to drive the push block to move up and down, and the push block is located between the two support rods. The top of the push block is a slope structure, and the top of the push block can stop against the metal pipe.

[0021] Preferably, a composite cigarette tube forming method is applied to the composite cigarette tube extrusion device described above, comprising the following steps: The first step is to load the material. The lead screw rotates and drives the sliding seat to approach the metal tube. When the paddle plate and the end of the metal tube stop, the paddle plate pushes the metal tube to move until the metal tube passes through the lower die and is sleeved on the positioning column. The second step is extrusion molding. The mold core expands outward to support an annular protrusion at the corresponding position of the metal tube. Then the mold core shrinks, the lower mold stops against one side of the annular protrusion, and the upper mold gradually approaches the lower mold. During this process, the upper mold and the lower mold will squeeze the annular protrusion, thereby shaping the annular protrusion into a set wave-like structure. Then the first template and the second template move away from each other, and the mold frame moves to the other side of the wave-like structure. The first template and the second template approach and stop, and the mold frame moves and resets to realize the feeding of the metal tube. Repeat the above process until the metal tube is completed. The third step is blanking. After the metal tube is formed, its outer contour diameter increases, and the two support rods are moved away from each other through the adjustment mechanism. The lever drives the paddle to move away from the sliding seat, and the lead screw drives the sliding seat to move until the paddle extends into between the two wavy structures of the metal tube. Then the lead screw rotates in the opposite direction, the paddle and the wavy structure of the metal tube stop, and the metal tube is pulled out of the mold system. Then the blanking mechanism moves upward to push the metal tube out from the support rod to complete the blanking.

[0022] Beneficial effects: The feeding conveyor belt delivers the metal tube to between the two support rods, and the sliding seat is driven to move by the driving mechanism. The paddle plate moves synchronously with the sliding seat, and the paddle plate can stop at the end of the metal tube and push the metal tube along the support rod into the mold system, thereby realizing automatic loading.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are: According to the composite cigarette tube extrusion device of the present invention, the feeding conveyor belt delivers the metal tube between the two support rods, the sliding seat is driven to move by the driving mechanism, the shift plate moves synchronously with the sliding seat, the shift plate can stop at the end of the metal tube and push the metal tube along the support rod into the mold system, thereby realizing automatic loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of a composite cigarette tube extrusion device according to an embodiment of the present invention.

[0025] Figure 2It is a cross-sectional view of a composite cigarette tube extrusion device according to an embodiment of the present invention.

[0026] Figure 3 Schematic diagram of the upper mold structure of an embodiment of the present invention.

[0027] Figure 4 Schematic diagram of the lower mold structure of an embodiment of the present invention.

[0028] Figure 5 Schematic diagram of the core structure of an embodiment of the present invention.

[0029] Figure 6 It is a schematic diagram of the mold flap structure of an embodiment of the present invention.

[0030] Figure 7 It is a structural schematic diagram of a feeding mechanism and an adjusting mechanism according to an embodiment of the present invention.

[0031] Figure 8 2 is a schematic diagram of the structure of a sliding seat according to an embodiment of the present invention.

[0032] Fig. 9 It is a schematic diagram of the structure of the dial plate according to an embodiment of the present invention.

[0033] Fig.10 It is a schematic diagram of the position of the unloading mechanism of an embodiment of the present invention.

[0034] Reference numerals: 1. Frame; 11. Guide rod; 12. Positioning column; 13. Limit rod; 21. Upper mold; 22. First driving member; 23. Lower mold; 231. Mold frame; 232. First mold plate; 233. Second mold plate; 234. Third driving member; 235. Fourth driving member; 24. Second driving member; 25. Mold core; 251. Fifth driving member; 252. Driving rod; 253. Mold flap; 254. First elastic member; 3. Feeding mechanism; 31. Support rod; 321. Lead screw; 322. Driving motor Machine; 33, sliding seat; 331, fixed rod; 34, dial plate; 341, first plate; 342, second plate; 343, connecting plate; 344, third elastic member; 345, driving gear; 346, limit plate; 4, adjusting mechanism; 41, movable rod; 411, second elastic member; 421, first adjusting gear; 422, second adjusting gear; 43, first connecting rod; 44, second connecting rod; 5, dial rod; 61, lifting mechanism; 62, push block; 7, feed conveyor belt; 8, discharge conveyor belt. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] like Figures 1 to 10 As shown, the composite cigarette tube extrusion device of the present invention comprises: a frame 1, a mold system, a feeding mechanism 3, an adjusting mechanism 4 and a feeding mechanism. The mold system comprises an upper mold 21, a lower mold 23 and a mold core 25, the feeding mechanism 3 comprises a support rod 31, a driving mechanism, a sliding seat 33 and a dial plate 34, the adjusting mechanism 4 comprises a movable rod 41, an adjusting gear, a first connecting rod 43 and a second connecting rod 44, and the feeding mechanism comprises a lifting mechanism 61 and a push block 62. The lower mold 23 comprises a mold frame 231, a first mold plate 232 and a second mold plate 233, the mold core 25 comprises a plurality of mold petals 253, a driving rod 252 and a fifth driving member 251, the driving mechanism comprises a lead screw 321 and a driving motor 322, and the dial plate 34 comprises a first plate 341 and a second plate 342.

[0037] Specifically, Figure 1 As shown, the frame 1 is supported on the ground, a feed conveyor belt 7 is provided on the left side of the frame 1 , and a discharge conveyor belt 8 is provided on the right side of the frame 1 .

[0038] like Figures 1 to 6As shown, the mold system includes an upper mold 21, a lower mold 23 and a mold core 25. A guide rod 11 is provided on the frame 1. The upper mold 21 is slidably fitted on the guide rod 11. A positioning hole is provided at the center of the upper mold 21. The aperture of the positioning hole is the same as the outer diameter of the metal tube. A first driving member 22 is provided on the frame 1. The first driving member 22 is a hydraulic cylinder. The output end of the first driving member 22 is fixedly connected to the upper mold 21. The first driving member 22 is used to drive the upper mold 21 to move forward and backward. The lower mold 23 includes a mold frame 231, a first template 232 and a second template 233. The mold frame 231 is slidably fitted on the guide rod 11. A second driving member 24 is provided on the frame 1. The second driving member 24 is a hydraulic cylinder. The mold frame 231 is fixedly connected to the output end of the second driving member 24 through a connecting rod. The second driving member 24 is used to drive the mold frame 231 to move forward and backward. The first template 232 and the second template 233 are respectively arranged on the left and right sides of the mold frame 231. The first template 232 and the second template 233 are both slidably matched with the mold frame 231. The mold frame 231 is provided with a third driving member 234 and a fourth driving member 235. The third driving member 234 and the fourth driving member 235 are both hydraulic cylinders. The output end of the third driving member 234 is fixedly connected to the first template 232, and the output end of the fourth driving member 235 is fixedly connected to the second template 233. The third driving member 234 and the fourth driving member 235 are used to drive the first template 232 and the second template 233 to move closer to or away from each other. The first template 232 is provided with a semicircular groove, and the second template 233 is provided with a semicircular groove symmetrical to the first template 232. When the first template 232 and the second template 233 are stopped, the two semicircular grooves can be assembled to form a circular hole, and the aperture of the circular hole is the same as the outer diameter of the metal pipe. A positioning column 12 is provided at the front end of the frame 1. The positioning column 12 extends backward. The outer diameter of the positioning column 12 is the same as the inner diameter of the metal pipe. The positioning column 12 can extend into the metal pipe, and its outer wall can fit with the inner wall of the metal pipe. The positioning column 12 is a hollow structure. The mold core 25 includes multiple mold halves 253, a driving rod 252 and a fifth driving member 251. The fifth driving member 251 is a hydraulic cylinder, which is arranged in the positioning column 12 and fixedly connected to the positioning column 12. The front end of the driving rod 252 extends into the positioning column 12 and is fixedly connected to the output end of the fifth driving member 251. The rear end of the driving rod 252 is truncated cone-shaped, and the small diameter end of the truncated cone-shaped structure is close to the front end of the driving rod 252. Multiple mold halves 253 are continuously distributed along the circumference of the driving rod 252. The front end of the mold halves 253 extends into the positioning column 12 and is elastically connected to the inner wall of the positioning column 12 through the first elastic member 254. The first elastic member 254 is an elastic column. The rear end of the mold halves 253 has a protrusion, and the protrusions of multiple mold halves 253 can be assembled into an annular structure.When the fifth driving member 251 drives the driving rod 252 to move forward, the truncated cone-shaped structure at the rear end of the driving rod 252 stops against the mold flap 253 and pushes the mold flap 253 to move radially outward along the driving rod 252, and the first elastic member 254 contracts. When the fifth driving member 251 drives the driving rod 252 to move backward, the truncated cone-shaped structure at the rear end of the driving rod 252 breaks away from contact with the mold flap 253, and the mold flap 253 moves radially inward along the driving rod 252 under the elastic force of the first driving member 22, thereby achieving resetting.

[0039] like Figure 1 , Figure 2 , Figure 4 and Figure 7 As shown, the feeding mechanism 3 includes a support rod 31, a driving mechanism, a sliding seat 33 and a paddle 34. There are two support rods 31, and the two support rods 31 are distributed in parallel and at intervals. The rear end of each support rod 31 is slidably matched with the frame 1, and the front end of the support rod 31 is fixedly connected to the mold frame 231. The front end of the support rod 31 is provided with an adjustment mechanism 4, and the adjustment mechanism 4 includes a movable rod 41, an adjustment gear, a first connecting rod 43 and a second connecting rod 44. The movable rod 41 is slidably matched on the mold frame 231. A second elastic member 411 is provided between the movable rod 41 and the mold frame 231. The second elastic member 411 is a spring, and the movable rod 41 can move up and down. A rotating shaft is rotatably matched on the frame 1, and the rear end of the rotating shaft is rotatably matched with the frame 1, and its front end passes through the mold frame 231 and extends forward, and the rotating shaft is slidably matched with the mold frame 231, and the adjusting gear includes a first adjusting gear 421 and a second adjusting gear 422, the first adjusting gear 421 is fixedly connected to the front end of the rotating shaft, and the second adjusting gear 422 is fixedly connected to the rear end of the rotating shaft, and a tooth groove is provided at the bottom of the movable rod 41, and the movable rod 41 is meshed with the first adjusting gear 421, and the two first connecting rods 43 are respectively arranged at the front end and rear end of the left support rod 31, and the two second connecting rods 44 are respectively arranged at the front end and rear end of the right support rod 31, and the top ends of the first connecting rod 43 and the second connecting rod 44 are fixedly connected to the corresponding support rod 31, and the first connecting rod 43 and the second connecting rod 44 located at the front ends of the two support rods 31 are meshed with the first adjusting gear 421, and the first connecting rod 43 and the second connecting rod 44 located at the rear ends of the two support rods 31 are meshed with the second adjusting gear 422. When the movable rod 41 moves upward, the movable rod 41 drives the adjusting gear to rotate forward, and the adjusting gear drives the first connecting rod 43 and the second connecting rod 44 to approach each other, and makes the two support rods 31 approach each other synchronously. When the movable rod 41 moves downward, the movable rod 41 drives the adjusting gear to rotate reversely, and the adjusting gear drives the first connecting rod 43 and the second connecting rod 44 to move away from each other, and makes the two support rods 31 move away from each other synchronously.

[0040] like Figures 7 to 9As shown, the driving mechanism includes a lead screw 321 and a driving motor 322. The lead screw 321 is rotatably engaged with the frame 1, and the lead screw 321 is located below the two support rods 31. The output end of the driving motor 322 is fixedly connected to the lead screw 321, and the driving motor 322 is used to drive the lead screw 321 to rotate. The sliding seat 33 is threadedly engaged with the lead screw 321. The frame 1 is also provided with a limit rod 13, which is located above the lead screw 321 and is spaced apart from and parallel to the lead screw 321. The sliding seat 33 is slidably engaged with the limit rod 13, and the rotation of the lead screw 321 can drive the sliding seat 33 to move in the front-rear direction. There are two dial plates 34, which are respectively arranged on both sides of the sliding seat 33. The dial plates 34 include a first plate 341 and a second plate 342. The top of the first plate 341 and the bottom of the second plate 342 are rotatably matched through a torsion spring. The top of the first plate 341 has an arc surface structure, and the second plate 342 can rotate within a range of 90 degrees along the arc surface structure of the first plate 341. A connecting plate 343 is fixedly connected to the bottom end of the first plate 341. One end of the connecting plate 343 extends into the sliding seat 33 and is elastically connected to the sliding seat 33 through a third elastic member 344. The connecting plate 343 is slidably matched with the sliding seat 33. The connecting plate 343 can slide relative to the sliding seat 33, so that the first plate 341 and the second plate 342 can approach and then move away from the sliding seat 33. A flange is provided at the other end of the connecting plate 343, and a lever 5 is provided between the two first connecting rods 43 and the two second connecting rods 44. Each flange is stopped by a lever 5. A fixing rod 331 is also provided on the side wall of the sliding seat 33. A driving gear 345 is rotatably fitted on the first plate 341, and the driving gear 345 is meshed with the fixing rod 331. A limiting plate 346 is also slidably fitted on the first plate 341, and the side wall of the limiting plate 346 is meshed with the driving gear 345. The limiting plate 346 can stop with the second plate 342, thereby limiting the rotation of the second plate 342. When the first plate 341 is away from the sliding seat 33, the driving gear 345 moves along the fixing rod 331, and the fixing rod 331 drives the driving gear 345 to rotate, and the driving gear 345 drives the limiting plate 346 to move downward, so that the limiting plate 346 is out of contact with the second plate 342, and the second plate 342 can rotate relative to the first plate 341. When the first plate 341 is close to the sliding seat 33, the driving gear 345 drives the limiting plate 346 to move upward, and the limiting plate 346 stops against the second plate 342, so that the second plate 342 remains in a vertical state to prevent it from rotating.

[0041] like Fig.10 As shown, a material unloading mechanism is also provided under the frame 1, and the material unloading mechanism includes a lifting mechanism 61 and a push block 62. The lifting mechanism 61 is a hydraulic cylinder, and the bottom end of the push block 62 is fixedly connected to the output end of the lifting mechanism 61. The push block 62 is located below the two support rods 31, and the top end of the push block 62 has a bevel end. The lifting mechanism 61 is used to drive the push block 62 to move up and down.

[0042] The forming method of the composite cigarette tube according to the embodiment of the present invention is applied to the composite cigarette tube extrusion device according to the embodiment of the present invention, comprising the following steps: The first step is loading. The feed conveyor 7 continuously transports the metal tube to the frame 1, and the metal tube on the left side can push the metal tube on the frame 1 to between the two support rods 31 under the drive of the feed conveyor 7, and then the driving motor 322 drives the lead screw 321 to rotate, so that the sliding seat 33 moves forward. During the movement of the sliding seat 33, the paddle 34 stops at the rear end of the metal tube and pushes the metal tube on the support rod 31 forward until the positioning column 12 extends into the metal tube. At this time, the metal tube extends into the circular hole between the first template 232 and the second template 233 and the positioning hole in the center of the upper mold 21 respectively.

[0043] The second step is extrusion molding. The fifth driving member 251 drives the driving rod 252 to move forward. The truncated cone-shaped structure at the rear end of the driving rod 252 pushes the mold flap 253 to expand outward. The mold flap 253 squeezes the metal tube from the inside, so that an annular protrusion is formed on the metal tube. Then the fifth driving member 251 drives the driving rod 252 to move backward. The truncated cone-shaped structure at the rear end of the driving rod 252 is out of contact with the mold flap 253. The mold flap 253 shrinks and resets under the action of the first elastic member 254. When an annular protrusion is formed on the metal tube, the first template 232 and the second template 233 stop against the rear end of the annular protrusion. After the mold flap 253 is reset, the first driving member 22 drives the upper mold 21 to move backward. During the movement, the upper mold 21 stops against the front end of the annular protrusion and squeezes the annular protrusion together with the first template 232 and the second template 233 to shape the annular protrusion into a set wave-like structure. Then, the first driving member 22 drives the upper mold 21 to reset, and the third driving member 234 and the fourth driving member 235 drive the first template 232 and the second template 233 to move the upper mold 21 backward. 233 move away from each other, and then the second driving member 24 drives the mold frame 231 to move forward, so that the first template 232 and the second template 233 pass over the shaped wavy structure on the metal tube, and the third driving member 234 and the fourth driving member 235 drive the first template 232 and the second template 233 to approach each other until the first template 232 and the second template 233 stop, at this time, the first template 232 and the second template 233 stop with the front end of the shaped wavy structure on the metal tube, and then repeat the above process until the metal tube completes the forming operation.

[0044] The third step is blanking. During the forming process, the movable rod 41 always stops at the bottom end of the metal tube. After the wavy structure is formed on the metal tube, the outer diameter of the outer contour of the metal tube increases, thereby pushing the movable rod 41 to move downward. The movable rod 41 moves downward to drive the first adjusting gear 421 to rotate. The second adjusting gear 422 rotates synchronously with the first adjusting gear 421, and drives the two support rods 31 to move away from each other through the first connecting rod 43 and the second connecting rod 44, so that the two support rods 31 adapt to the increased outer diameter of the metal tube. At the same time, the two levers 5 will drive the connecting plate 343 to move relative to the sliding seat 33 through the flange, so that the two lever plates 34 on both sides of the sliding seat 33 move away from each other. In this process, the driving gear 345 moves along the fixed rod 331, thereby driving the limit plate 346 to move downward, and the limit plate 346 releases the limit on the second plate 342. The driving motor 322 drives the lead screw 321 to rotate, and the lead screw 321 drives the sliding seat 33 to move forward. When the second plate 342 stops contacting with the wavy protrusion of the metal tube, the second plate 342 will bend backward so as to be able to pass over the wavy protrusion. After the second plate 342 passes over the wavy protrusion at the rear end, it will extend between the two wavy protrusions under the action of the torsion spring. Then the driving motor 322 drives the lead screw 321 to rotate in the opposite direction, and the lead screw 321 drives the sliding seat 33 to move backward. The second plate 342 stops contacting with the wavy protrusion, thereby being able to drive the formed metal tube to move backward and withdraw the metal tube from the mold system until the metal tube moves to the rear end of the support rod 31. At this time, the lifting mechanism 61 drives the push block 62 to move upward, and the push block 62 pushes the formed metal tube out of the support rod 31. The formed metal tube moves to the right and falls on the discharge conveyor belt 8.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A composite cigarette tube extrusion device, comprising: A frame, wherein a feeding conveyor belt and a discharging conveyor belt are respectively provided on both sides of the frame; A die system, wherein the die system is used to extrude the metal tube to form a wavy structure; It is characterized in that a feeding mechanism is also provided, which includes a support rod, a driving mechanism, a sliding seat and a paddle plate, the two support rods are distributed on the frame in parallel and at intervals, the support rod is used to support the metal tube, the driving mechanism includes a lead screw and a driving motor, the lead screw is rotatably engaged on the frame, the driving motor is connected to the lead screw, the sliding seat is threadedly engaged on the lead screw, the lead screw is used to drive the sliding seat to approach or move away from the mold system, the paddle plate is arranged on the sliding seat, and the paddle plate is used to push the metal tube on the support rod into the mold system.

2. The composite cigarette tube extrusion device according to claim 1, characterized in that: The mold system includes an upper mold, a lower mold and a mold core. The upper mold is slidably fitted on the frame. The frame is provided with a first driving member, which is used to drive the upper mold to move. The frame is provided with a second driving member, which is used to drive the lower mold to move. The frame is also provided with a positioning column, and the mold core is arranged on the positioning column. The mold core is used to support the metal tube.

3. The composite cigarette tube extrusion device according to claim 2, characterized in that: The lower mold includes a mold frame, a first template and a second template. The mold frame is slidably fitted on the frame. The first template and the second template are both slidably fitted on the mold frame. A third driving member and a fourth driving member are provided on the mold frame. The third driving member is connected to the first template, and the fourth driving member is connected to the second template.

4. The composite cigarette tube extrusion device according to claim 3, characterized in that: The mold core includes multiple mold pieces, a driving rod and a fifth driving member. The positioning column is a hollow structure. The fifth driving member is arranged in the positioning column. The driving rod is connected to the fifth driving member. The multiple mold pieces are continuously distributed along the circumference of the driving rod. The multiple mold pieces can be assembled to form an annular structure. Each mold piece is connected to the positioning column through a first elastic member. The end of the driving rod is in a truncated cone shape. The driving rod can drive the mold pieces to expand.

5. The composite cigarette tube extrusion device according to claim 3, characterized in that: The support rod is also provided with an adjustment mechanism, which includes a movable rod, an adjustment gear, a first connecting rod and a second connecting rod. The movable rod is slidably fitted on the mold frame, and a second elastic member is provided between the movable rod and the mold frame. The top end of the movable rod can stop against the metal pipe, and the adjustment gear is rotatably fitted on the frame. The bottom end of the movable rod is meshed with the adjustment gear, and the first connecting rod and the second connecting rod are both meshed with the adjustment gear. The top ends of the first connecting rod and the second connecting rod are respectively connected to the two support rods.

6. The composite cigarette tube extrusion device according to claim 5, characterized in that: The shift plate includes a first plate and a second plate, the top end of the first plate is rotatably connected to the second plate, the bottom end of the first plate is provided with a connecting plate, one end of the connecting plate is provided with a flange, and the other end of the connecting plate is connected to the sliding seat through a third elastic member, the connecting plate is slidably matched with the sliding seat, the adjusting mechanism is provided with a shift rod, the shift rod is stopped by the corresponding flange, the sliding seat is provided with a fixing rod, the first plate is rotatably matched with a driving gear, the driving gear is meshed with the fixing rod, the first plate is slidably matched with a limiting plate, and the limiting plate is meshed with the driving gear.

7. The composite cigarette tube extrusion device according to claim 1, characterized in that: A material unloading mechanism is also provided under the frame, and the material unloading mechanism includes a lifting mechanism and a push block. The lifting mechanism is used to drive the push block to move up and down. The push block is located between the two support rods. The top of the push block is a slope structure, and the top of the push block can stop against the metal pipe.

8. A composite cigarette tube forming method, applied to the composite cigarette tube extrusion device according to claim 7, characterized in that: The following steps are involved: The first step is to load the material. The lead screw rotates and drives the sliding seat to approach the metal tube. When the paddle plate and the end of the metal tube stop, the paddle plate pushes the metal tube to move until the metal tube passes through the lower die and is sleeved on the positioning column. The second step is extrusion molding. The mold core expands outward to support an annular protrusion at the corresponding position of the metal tube. Then the mold core shrinks, the lower mold stops against one side of the annular protrusion, and the upper mold gradually approaches the lower mold. During this process, the upper mold and the lower mold will squeeze the annular protrusion, thereby shaping the annular protrusion into a set wave-like structure. Then the first template and the second template move away from each other, and the mold frame moves to the other side of the wave-like structure. The first template and the second template approach and stop, and the mold frame moves and resets to realize the feeding of the metal tube. Repeat the above process until the metal tube is completed. The third step is blanking. After the metal tube is formed, its outer contour diameter increases, and the two support rods are moved away from each other through the adjustment mechanism. The lever drives the paddle to move away from the sliding seat, and the lead screw drives the sliding seat to move until the paddle extends into between the two wavy structures of the metal tube. Then the lead screw rotates in the opposite direction, the paddle and the wavy structure of the metal tube stop, and the metal tube is pulled out of the mold system. Then the blanking mechanism moves upward to push the metal tube out from the support rod to complete the blanking.

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