Tire mold forming method based on SLM process and tire mold

Abstract

The present invention relates to the field of tire mold forming, and provides a tire mold forming method and a tire mold based on an SLM process, comprising the following steps: Step 1, using an SLM printing device to print in layers to produce a small layer thickness entity, a small layer thickness air permeable structure is provided on the small layer thickness entity, and by adjusting the printing parameters of the SLM printing device, the small layer thickness air permeable structure is made to have a porous structure inside and have a certain strength; Step 2, using an SLM printing device to print in layers to produce a large layer thickness entity, a large layer thickness air permeable structure and two or more through holes are provided on the large layer thickness entity; by adjusting the printing parameters of the SLM printing device, the large layer thickness air permeable structure is made to have a porous structure inside and have a certain strength; Step 3, the small layer thickness entity and the large layer thickness entity are nested with each other to form a tire mold. The present invention adopts a layered printing method of an SLM printing device to make the positioning holes on the mold into a small layer thickness air permeable structure and a large layer thickness air permeable structure, thereby reducing post-processing procedures and time.

Description

Technical Field

[0001] The present invention relates to the technical field of tire mold forming, and in particular to a tire mold forming method and a tire mold based on a SLM process. Background Art

[0002] The traditional method of making tire molds is to print them as a whole, which takes a long time and is costly. When preparing the tire, it is necessary to drill the positioning holes on the mold, and then vulcanize the rubber material. The resulting tire surface has a large amount of dense fetal hair, which must then be removed to complete the tire preparation. The process is cumbersome and time-consuming. Summary of the invention

[0003] In view of the above technical problems, the present invention aims to provide a tire mold forming method and a tire mold based on the SLM process. To solve the above technical problems, the present invention adopts the following technical solutions:

[0004] A tire mold forming method based on SLM technology comprises the following steps:

[0005] Step 1: Use an SLM printing device to print in layers to produce a small layer thickness entity, the thickness of the small layer thickness entity is set to 2-3mm, and a small layer thickness breathable structure is provided on the small layer thickness entity. By adjusting the printing parameters of the SLM printing device, the inside of the small layer thickness breathable structure reaches a porous structure and has a certain strength;

[0006] Step 2: Use an SLM printing device to print in layers to produce a large-layer-thick entity, on which a large-layer-thick breathable structure is provided, and on which two or more through holes are provided, and the inner diameters of all through holes are 0.3-0.4 mm, and the through holes enable the large-layer-thick breathable structure to achieve a good breathable effect; by adjusting the printing parameters of the SLM printing device, the interior of the large-layer-thick breathable structure reaches a porous structure with a certain strength, so that the large-layer-thick breathable structure and the small-layer-thick breathable structure can be well ventilated and intercommunicated;

[0007] Step 3: Nest the small layer thickness entity and the large layer thickness entity to form a tire mold.

[0008] Furthermore, in the step 2, the printing parameters of the SLM printing device are adjusted, including adjusting the process permeability parameters. After adjusting the process permeability parameters, the permeability parameters closest to the entity parameters are obtained, and then the metallographic phase is prepared to observe the internal pores of the thick entity, the porosity is quantified using the imagepro software, and the pore size is detected using a two-dimensional measuring instrument.

[0009] Further, the SLM printing device includes a base, a printer, a filtering device, an air outlet pipe, a gas tank 1, a gas tank 2, an air pipe 1, an air pipe 2, a converter, an air inlet pipe and an air return pipe. The printer and the filtering device are both fixedly connected to the top wall of the base. The gas tank 1 and the gas tank 2 can be detachably connected to the top wall of the base. The filtering device is connected to the printer through the air outlet pipe and the air return pipe. A filtering cavity is provided on the filtering device. A filtering assembly is provided in the filtering cavity. The filtering assembly includes a filter screen, and the filter screen is fixedly connected to the inner wall of the filtering cavity. The air inlet pipe is fixedly connected to the printer. The converter is fixedly connected to the air inlet pipe. The gas tank 1 is connected to the converter through the air pipe 1, and the gas tank 2 is connected to the converter through the air pipe 2.

[0010] The converter is provided with an air intake channel and a threaded channel that are interconnected, the air intake channel is connected with the air intake pipe, the air pipe 1 and the air pipe 2 are both connected with the threaded channel, a threaded column is connected with the inner thread of the threaded channel, a through hole is provided on the threaded column, a transmission column is fixedly connected to the lower end of the threaded column, a telescopic groove is provided at the lower end of the transmission column, a slider is slidably connected to the inner wall of the telescopic groove, a threaded rod is fixedly connected to the lower end of the slider, a spur gear 1 is fixedly connected to the threaded rod, the lower end of the threaded rod is rotatably connected to the bottom wall of the filter chamber, a fixing plate is fixedly connected to the top wall of the filter device, a motor is slidably connected to the fixing plate, a spur gear 2 is fixedly connected to the output shaft of the motor, and the spur gear 2 is meshed with the spur gear 1;

[0011] A cleaning piece is slidably connected to the inner wall of the filter cavity. A threaded hole is provided on the cleaning piece. The threaded rod is threadedly connected to the inner wall of the threaded hole. Bristles are fixedly connected to the cleaning piece. The bristles and the filter screen are against each other.

[0012] Furthermore, the filter assembly also includes a mesh frame, which is filled with main purification balls, and the mesh frame is inlaid with permanent magnets three. The bottom wall of the filter device is rotatably connected to a baffle, the baffle and the bottom wall of the mesh frame are abutted against each other, the baffle is connected to the filter device through elastic parts four, and the baffle supports the mesh frame.

[0013] The top wall of the filter chamber is connected with the top wall of the filter device through a transmission channel, and a accommodating groove is provided on the side wall of the transmission channel, and a permanent magnet 2 is inlaid on the side wall of the accommodating groove. A storage box is slidably connected to the inner wall of the transmission channel, and a storage chamber is provided on the storage box, and spare purification balls are filled in the storage chamber. A sheet groove is provided on the bottom wall of the storage box, and a sliding sheet is slidably connected to the inner wall of the sheet groove, and the sliding sheet is connected to the side wall of the sheet groove through an elastic member 3. A blocking sheet is slidably connected to the bottom wall of the storage box, and the blocking sheet supports the spare purification balls. A permanent magnet 1 is fixedly connected to the blocking sheet, and the permanent magnet 1 is fixedly connected to the sliding sheet. An embedded sheet is fixedly connected to the blocking sheet, and a pressure strip is fixedly connected to the bottom wall of the storage box. An embedded groove is provided on the pressure strip, and a press-type elastic self-locking mechanism is provided in the embedded groove. The embedded sheet and the press-type elastic self-locking mechanism are locked, and a tooth groove is provided on the side wall of the storage box, and a transmission tooth is fixedly connected to the inner wall of the tooth groove. A connecting plate and an extension rod are fixedly connected to the storage box, and the bottom wall of the connecting plate is connected to the top wall of the filter device through an elastic member 2, and a rack is fixedly connected to the extension rod.

[0014] A pressing plate is fixedly connected to the transmission column, a worm is fixedly connected to the bottom wall of the spur gear two, spur gear three and spur gear four are rotatably connected to the fixed plate, spur gear four is meshed with the transmission teeth, a worm wheel is fixedly connected to the spur gear three, the worm wheel and the worm are meshed, a moving seat is slidably connected to the fixed plate, a spur gear five is rotatably connected to the moving seat, a connecting plate and a supporting plate are fixedly connected to the fixed plate, the connecting plate is connected to the moving seat through an elastic member one, the connecting plate is connected to the moving seat through an airbag ball, an inflatable ball is fixedly connected to the support plate, an air valve is fixedly connected to the inflatable ball, a gear-shaped knob switch is rotatably connected to the air valve, and the air valve is connected to the airbag ball through a catheter.

[0015] Furthermore, a vibration chamber is provided on the filter device, an impact piece is fixedly connected to the threaded rod, the filter screen extends into the vibration chamber, a vibration piece is fixedly connected to the filter screen, and both the impact piece and the vibration piece are located in the vibration chamber.

[0016] Furthermore, a recycling box is detachably connected to the top wall of the base.

[0017] Furthermore, the bottom wall of the filter cavity is detachably connected with a recoverer.

[0018] Furthermore, the printer is movably connected to a door.

[0019] Furthermore, a vacuum pump is fixedly connected to the printer, a temperature detector is fixedly connected to the printer, and the filter device is fixedly connected to the top wall of the base through a bracket.

[0020] A tire mold is made by using the tire mold forming method based on the SLM process.

[0021] The tire mold comprises a small-layer-thickness entity and a large-layer-thickness entity which are nested with each other. The small-layer-thickness entity is provided with two or more small-layer-thickness breathable structures, and the large-layer-thickness entity is provided with two or more large-layer-thickness breathable structures.

[0022] The present invention has the following beneficial effects:

[0023] The present invention adopts a layered printing method of an SLM printing device, which greatly shortens the mold forming time. The positioning holes on the mold are made into a small-layer thick breathable structure and a large-layer thick breathable structure. There is no need to open them during tire preparation. After vulcanization treatment, some areas with large roughness formed on the tire surface can be effectively solved, which greatly reduces the post-processing steps and processing time, and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0025] Figure 1 It is a front view of a tire mold in a tire mold forming method based on the SLM process of the present invention;

[0026] Figure 2 It is a bottom view of a tire mold in a tire mold forming method based on the SLM process of the present invention;

[0027] Figure 3 It is a structural schematic diagram of an SLM printing device in a tire mold forming method based on the SLM process of the present invention;

[0028] Figure 4 The present invention Figure 3 The enlarged view of point A in the middle;

[0029] Figure 5 The present invention Figure 4 The enlarged view of point B in the middle;

[0030] Figure 6 The present invention Figure 4 Enlarged view of point C in the middle;

[0031] Figure 7 It is a structural schematic diagram of the spur gear five and the moving seat in the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of the transmission column and the slider in the present invention;

[0033] Fig. 9 The present invention Figure 4 Enlarged view of point D in the middle.

[0034] Reference numerals: 1, base; 2, printer; 3, vacuum pump; 4, temperature detector; 5, machine door; 6, bracket; 7, filter device; 8, filter chamber; 9, air outlet pipe; 10, gas tank 1; 11, gas tank 2; 12, air pipe 1; 13, air pipe 2; 14, converter; 15, air inlet pipe; 16, air inlet channel; 17, threaded column; 171, through hole; 18, threaded channel; 19, transmission column; 20, telescopic slot; 21. Pressing plate; 22. Sliding block; 23. Spur gear 1; 24. Fixing plate; 25. Motor; 26. Spur gear 2; 27. Worm; 28. Worm wheel; 29. ​​Spur gear 3; 30. Spur gear 4; 31. Spur gear 5; 32. Moving seat; 33. Elastic piece 1; 34. Connecting piece; 35. Airbag ball; 36. Catheter; 37. Inflatable ball; 38. Air valve; 39. Gear-shaped knob switch; 40. Support plate; 41 , storage box; 42, storage chamber; 43, spare purification ball; 44, elastic member 2; 45, tooth groove; 46, transmission tooth; 47, connecting plate; 48, extension rod; 49, rack; 50, sheet groove; 51, elastic member 3; 52, sliding plate; 53, permanent magnet 1; 54, baffle; 55, embedded sheet; 56, pressure strip; 57, embedded groove; 58, transmission channel; 59, receiving groove; 60, permanent magnet 2; 61, vibration chamber ; 62. Threaded rod; 63. Cleaning part; 64. Threaded hole; 65. Bristles; 66. Impact part; 67. Vibrating part; 68. Filter; 69. Net frame; 70. Main purification ball; 71. Permanent magnet three; 72. Baffle; 73. Elastic part four; 74. Recycler; 75. Return air pipe; 76. Recycling box; 77. Small layer thickness entity; 78. Large layer thickness entity; 79. Small layer thickness breathable structure; 80. Large layer thickness breathable structure. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figure 1-Figure 9 As shown, a tire mold forming method based on the SLM process includes the following steps:

[0039] Step 1: Use an SLM printing device to print in layers to produce a small layer thickness entity 77, the thickness of the small layer thickness entity 77 is set to 2-3mm, and a small layer thickness air permeable structure 79 is provided on the small layer thickness entity 77. By adjusting the printing parameters of the SLM printing device, the inside of the small layer thickness air permeable structure 79 reaches a porous structure with a certain strength;

[0040] Step 2: Use an SLM printing device to print in layers to produce a thick layer entity 78. The thick layer entity 78 is provided with a thick breathable structure 80. The thick breathable structure 80 has two or more through holes. The inner diameter of all through holes is 0.3-0.4mm. The through holes enable the thick breathable structure 80 to achieve good ventilation effect. By adjusting the printing parameters of the SLM printing device, the inside of the thick breathable structure 80 reaches a porous structure with a certain strength, so that the thick breathable structure 80 and the thin breathable structure 79 can be well ventilated and communicated. Adjusting the printing parameters of the SLM printing device can be to reduce the laser power to reduce the melting degree of the powder, so as to keep part of the powder in a solid state and form a porous structure. It can also be other means such as increasing the scanning speed or adjusting the scanning interval.

[0041] Step 3: nest the small layer thickness entity 77 and the large layer thickness entity 78 to form a tire mold.

[0042] The present invention adopts a layered printing method of an SLM printing device, which greatly shortens the mold forming time. The positioning holes on the mold are made into a small-layer thick breathable structure 79 and a large-layer thick breathable structure 80. There is no need to open them during tire preparation. After vulcanization treatment, some areas with large roughness formed on the tire surface can be effectively solved, which greatly reduces the post-processing process and processing time, and saves costs.

[0043] According to an optional embodiment of the present invention, in step 2, adjusting the printing parameters of the SLM printing device includes adjusting the process permeability parameters. After adjusting the process permeability parameters, the permeability parameters closest to the entity parameters are obtained, and then the metallographic phase is prepared to observe the internal pores of the thick breathable structure 80, the porosity is quantified using imagepro software, and the pore size is detected using a two-dimensional measuring instrument.

[0044] According to an optional embodiment of the present invention, the SLM printing device includes a base 1, a printer 2, a filter device 7, an air outlet pipe 9, a gas tank 10, a gas tank 2 11, an air pipe 12, an air pipe 2 13, a converter 14, an air inlet pipe 15 and an air return pipe 75. The printer 2 and the filter device 7 are both fixedly connected to the top wall of the base 1. The gas tank 10 and the gas tank 2 11 can be detachably connected to the top wall of the base 1. The filter device 7 is connected to the printer 2 through the air outlet pipe 9 and the air return pipe 75. A filter cavity 8 is provided on the filter device 7. A filter assembly is provided in the filter cavity 8. The filter assembly includes a filter screen 68. The filter screen 68 is made of stainless steel. The filter screen 68 is fixedly connected to the inner wall of the filter cavity 8. The air inlet pipe 15 is fixedly connected to the printer 2. The converter 14 is fixedly connected to the air inlet pipe 15. The gas tank 10 is connected to the converter 14 through the air pipe 12. The gas tank 2 11 is connected to the converter 14 through the air pipe 2 13.

[0045] The converter 14 is provided with an air intake passage 16 and a threaded passage 18 which are interconnected. The air intake passage 16 is connected to the air intake pipe 15. The air pipe 12 and the air pipe 2 13 are both connected to the threaded passage 18. The threaded passage 18 is internally threaded with a threaded column 17. The threaded column 17 can move up and down when it rotates. A through hole 171 is provided on the threaded column 17. A transmission column 19 is fixedly connected to the lower end of the threaded column 17. A telescopic groove 20 is provided at the lower end of the transmission column 19. A slider 22 is slidably connected to the inner wall of the telescopic groove 20. The lower end of the slider 22 A threaded rod 62 is fixedly connected, a spur gear 23 is fixedly connected to the threaded rod 62, the lower end of the threaded rod 62 is rotatably connected to the bottom wall of the filter chamber 8, a fixed plate 24 is fixedly connected to the top wall of the filter device 7, a motor 25 is slidably connected to the fixed plate 24, the motor 25 is a device for converting electrical energy into mechanical energy, which uses an energized coil to generate a rotating magnetic field and acts on the rotor to form a magneto-electrical power rotation torque to rotate the output shaft, and a spur gear 26 is fixedly connected to the output shaft of the motor 25, and the spur gear 26 is meshed with the spur gear 23;

[0046] A cleaning piece 63 is slidably connected to the inner wall of the filter chamber 8. A threaded hole 64 is provided on the cleaning piece 63. The threaded rod 62 is threadedly connected to the inner wall of the threaded hole 64. Bristles 65 are fixedly connected to the cleaning piece 63. There are more than two hundred bristles 65. The bristles 65 are embedded and fixedly connected to the cleaning piece 63, and the bristles 65 and the filter net 68 are against each other.

[0047] According to an optional embodiment of the present invention, the filter assembly further includes a mesh frame 69, the mesh frame 69 is made of stainless steel, a plurality of meshes are provided on the mesh frame 69, the mesh frame 69 is filled with a main purification ball 70, the mesh frame 69 is inlaid with a permanent magnet three 71, the bottom wall of the filter device 7 is rotatably connected with a baffle 72, the baffle 72 and the bottom wall of the mesh frame 69 are against each other, the baffle 72 is connected to the filter device 7 through an elastic member four 73, and the baffle 72 supports the mesh frame 69;

[0048] The top wall of the filter chamber 8 is connected to the top wall of the filter device 7 through a transmission channel 58, a receiving groove 59 is provided on the side wall of the transmission channel 58, and a permanent magnet 2 60 is embedded in the side wall of the receiving groove 59. The inner wall of the transmission channel 58 is slidably connected to a storage box 41, a storage chamber 42 is provided on the storage box 41, and the storage chamber 42 is filled with spare purification balls 43. A sheet groove 50 is provided on the bottom wall of the storage box 41, and a sliding plate 52 is slidably connected to the inner wall of the sheet groove 50. The sliding plate 52 is connected to the side wall of the sheet groove 50 through an elastic member 3 51. A baffle 54 is slidably connected to the bottom wall of the storage box 41, and the baffle 54 supports the spare purification balls 43. A permanent magnet 1 53 is fixedly connected to the baffle 54, and the permanent magnet 1 53 is fixedly connected to the sliding plate 52. An embedded sheet 55 is fixedly connected to the baffle 54. A pressure strip 56 is fixedly connected to the bottom wall of the storage box 41. The strip 56 is provided with an embedding groove 57, and a push-type elastic self-locking mechanism is provided in the embedding groove 57. The push-type elastic self-locking mechanism is a mechanism that can automatically lock a component by pressing the hand piece embedding sheet 55 on it, and automatically pop the component open by pressing the embedding sheet 55 again. The embedding sheet 55 can be designed with reference to the TF card structure, and the push-type elastic self-locking mechanism can be designed with reference to the existing TF card seat, or other existing push-type elastic self-locking mechanisms can be used. The embedding sheet 55 and the push-type elastic self-locking mechanism are locked. The side wall of the storage box 41 is provided with a tooth groove 45, and the inner wall of the tooth groove 45 is fixedly connected with a transmission tooth 46. The storage box 41 is fixedly connected with a connecting plate 47 and an extension rod 48. The bottom wall of the connecting plate 47 is connected to the top wall of the filter device 7 through the elastic member 2 44, and the extension rod 48 is fixedly connected with a rack 49;

[0049] The transmission column 19 is fixedly connected with a pressing plate 21, the bottom wall of the spur gear 26 is fixedly connected with a worm 27, the fixed plate 24 is rotatably connected with a spur gear 3 29 and a spur gear 4 30, the spur gear 4 30 is meshed with the transmission tooth 46, the spur gear 3 29 is fixedly connected with a worm wheel 28, the worm wheel 28 is meshed with the worm 27, the fixed plate 24 is slidably connected with a moving seat 32, the moving seat 32 is rotatably connected with a spur gear 5 31, the fixed plate 24 is fixedly connected with a connecting piece 34 and a supporting plate 40, the connecting piece 34 is connected to the moving seat 32 through an elastic piece 1 33, the connecting piece 34 is connected to the moving seat 32 through an airbag ball 35, an inflatable ball 37 is fixedly connected to the supporting plate 40, an air valve 38 is fixedly connected to the inflatable ball 37, a gear-shaped knob switch 39 is rotatably connected to the air valve 38, and the air valve 38 is connected to the airbag ball 35 through a conduit 36.

[0050] According to an optional embodiment of the present invention, a vibration chamber 61 is opened on the filter device 7, an impact piece 66 is fixedly connected to the threaded rod 62, the filter screen 68 extends into the vibration chamber 61, a vibration piece 67 is fixedly connected to the filter screen 68, and both the impact piece 66 and the vibration piece 67 are located in the vibration chamber 61.

[0051] According to an optional embodiment of the present invention, a recovery box 76 is detachably connected to the top wall of the base 1, and the recovery box 76 is used to recover the purification balls.

[0052] According to an optional embodiment of the present invention, the bottom wall of the filter chamber 8 is detachably connected to a recoverer 74, and the recoverer 74 is used to recover impurities.

[0053] According to an optional embodiment of the present invention, the printer 2 is movably connected to a door 5, and the door 5 can be opened and closed to facilitate taking out the tire mold.

[0054] According to an optional embodiment of the present invention, a vacuum pump 3 is fixedly connected to the printer 2, and the vacuum pump 3 can evacuate the printer 2 before printing. A temperature detector 4 is fixedly connected to the printer 2, and the temperature detector 4 can monitor the temperature inside the printer 2 in real time. The filtering device 7 is fixedly connected to the top wall of the base 1 through a bracket 6.

[0055] Implementation process of the SLM printing device: in the initial state, the trachea 2 13 is connected to the through hole 171, the threaded column 17 blocks the trachea 12, the spur gear 5 31 is not engaged with other components, the airbag ball 35 is in a collapsed state, and the permanent magnet 1 53 is located to the right of the permanent magnet 2 60.

[0056] The valves on the gas tank 1 10 and the gas tank 2 11 are opened, and the gas pipe 2 13 continuously introduces argon gas into the printer 2, and the laser source in the printer 2 is turned on to start printing the tire mold.

[0057] The argon gas carries away impurities of the laser-burned powder during the printing process of the printer 2. The argon gas enters the filter chamber 8 from the air outlet pipe 9. The filter screen 68 blocks and filters the impurities in the argon gas. The argon gas then passes through the mesh frame 69 and enters the main purification ball 70 to be purified by the main purification ball 70. The argon gas flows back to the printer 2 from the return air pipe 75 for recycling and reuse, saving resources.

[0058] When the argon gas in the gas tank 11 is exhausted, the motor 25 is turned on, and the output shaft of the motor 25 rotates a certain number of circles, driving the spur gear 26, the worm 27, the worm wheel 28, the spur gear 3 29, the spur gear 1 23, the threaded rod 62, the slider 22, the transmission column 19, and the threaded column 17 to rotate. The threaded column 17 moves downward while rotating until the through hole 171 is connected to the air pipe 12. The threaded column 17 blocks the air pipe 13 and is replaced with the gas tank 10 to continuously introduce argon gas into the printer 2.

[0059] The rotation of the threaded rod 62 drives the cleaning member 63 and the bristles 65 to move downward, and the bristles 65 brush off the impurities on the filter screen 68. The fallen impurities fall into the recoverer 74 for collection, so that the user can subsequently disassemble the recoverer 74 to process the impurities. When the impact member 66 rotates, it will continuously impact the vibration member 67, thereby causing the vibration member 67 and the filter screen 68 to vibrate, so as to shake off the impurities that cannot be brushed off, thereby improving the cleaning quality.

[0060] When the pressing sheet 21 moves downward, it presses the inflatable ball 37 so that the inflatable ball 37 inflates the airbag ball 35. The airbag ball 35 expands to a certain volume, thereby pushing the moving seat 32 to overcome the elastic force of the elastic member 1 33 and move downward a short distance.

[0061] The old gas tank 11 is removed, and a new gas tank 11 is installed on the top wall of the base 1 and connected to the gas pipe 13. When the argon gas in the gas tank 10 is exhausted, the motor 25 is turned on, and the output shaft of the motor 25 rotates in the opposite direction for a certain number of circles, and the through hole 171 is connected to the gas pipe 13 again, and the threaded column 17 blocks the gas pipe 12, so that the new gas tank 11 continues to pass argon gas into the printer 2, and the gas tank 10 is replaced. This is repeated. After the inflatable ball 37 is pressed by the pressing sheet 21 for many times, the airbag ball 35 expands to a certain extent, and the spur gear 5 31 moves down to mesh with the spur gear 3 29 and the spur gear 4 30. The spur gear 430 rotates, and the spur gear 430 drives the storage box 41 to overcome the elastic force of the elastic member 244 and move downward. The baffle 54 pushes the main purification ball 70 to move downward, so that the main purification ball 70 pushes the baffle 72 to overcome the elastic force of the elastic member 473 and rotate the main purification ball 70 along the inclined baffle 72 to fall into the recovery box 76. After the pressure strip 56 and the baffle 72 are against each other, the baffle 72 can keep the tilt so that all the main purification balls 70 fall into the recovery box 76. When the permanent magnet 1 53 moves to the right of the permanent magnet 3 71, the magnetic repulsion of the permanent magnet 3 71 causes the permanent magnet 1 53 to move right a short distance. As a result, the embedded sheet 55 moves rightward for a short distance and then releases the lock of the push-type elastic self-locking mechanism. After the rack 49 moves downward, it will mesh with the gear-shaped knob switch 39, thereby driving the gear-shaped knob switch 39 to rotate, so that the air valve 38 opens, the airbag ball 35 deflates and shrinks, and the spur gear five 31 and the moving seat 32 move upward under the elastic force of the elastic member one 33. The spur gear five 31 is disengaged from the meshing with the spur gear three 29 and the spur gear four 30. The storage box 41 slowly moves upward and resets under the elastic force of the elastic member two 44. The baffle 72 is again against the bottom wall of the screen frame 69 under the elastic force of the elastic member four 73. The gear-shaped knob switch 39 is driven to reverse, and the air valve 38 is closed, so that the subsequent inflation ball 37 can inflate the airbag ball 35. After the baffle 54 moves to the right of the accommodating groove 59, the baffle 54 moves to the left and enters the accommodating groove 59 under the elastic force of the elastic member three 51, and the storage cavity 42 falls into the mesh frame 69. When the permanent magnet one 53 moves to the right of the permanent magnet two 60, the permanent magnet one 53 moves to the right under the magnetic repulsion of the permanent magnet two 60, and the embedding sheet 55 is inserted into the embedding groove 57 and locked by the push-type elastic self-locking mechanism, so that the subsequent user can re-add the spare purification ball 43 into the storage cavity 42.

[0062] The present invention can reuse argon gas after double filtration and purification, saving resources, and the gas tank 1 10 and the gas tank 2 11 can automatically and alternately provide argon gas for the printer 2 without stopping and pausing the forming, and during the alternation between the gas tank 1 10 and the gas tank 2 11, the bristles 65 can brush off the impurities on the filter 68, and the impact member 66 can impact the vibration member 67 to shake off the impurities on the filter 68, and perform double cleaning to improve the cleaning quality and convenience. After the gas tank 1 10 and the gas tank 2 11 are alternated for many times, the main purification ball 70 can automatically fall into the recycling box 76, and the spare purification ball 43 can automatically fall into the net frame 69, and the replacement of the purification ball is automatically completed. The components, modules, mechanisms and devices that are not described in detail in the present invention are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0063] like Figure 8-9 As shown, a tire mold is made by using the tire mold forming method based on the SLM process;

[0064] The tire mold includes a small layer thickness entity 77 and a large layer thickness entity 78 which are nested with each other. The small layer thickness entity 77 is provided with two or more small layer thickness air permeable structures 79 , and the large layer thickness entity 78 is provided with two or more large layer thickness air permeable structures 80 .

[0065] In the past, tire molds were made using an integrated printing method, which took a long time to print and was costly. When preparing a tire, it is necessary to drill the positioning holes on the tire mold, then vulcanize the rubber material, resulting in a large amount of dense fetal hair on the tire surface, and finally remove the fetal hair to complete the tire preparation work. The process is cumbersome and time-consuming.

[0066] In the present invention, the thickness of the small layer thickness entity 77 is 2-3mm, the contact surface of the small layer thickness entity 77 and the large layer thickness entity 78 needs to be nested, the depth of the nesting between the small layer thickness entity 77 and the large layer thickness entity 78 is 0.1mm, and the outer surface of the small layer thickness breathable structure 79 parallel to the central axis needs to be offset by 0.1mm in a direction perpendicular to the central axis.

[0067] By adjusting the parameters of the SLM printing device, the small-layer-thickness air-permeable structure 79 and the large-layer-thickness air-permeable structure 80 are made to have a porous structure with a certain strength, and can be well combined with the surrounding entities.

[0068] By changing the morphology of the small-layer-thick breathable structure 79 and the large-layer-thick breathable structure 80, through holes with a diameter of 0.3-0.4 mm are made in the small-layer-thick breathable structure 79 and the large-layer-thick breathable structure 80 to achieve a good ventilation effect.

[0069] By adjusting the parameters of the SLM printing device, the permeability parameters closest to the physical parameters are obtained, the metallographic structure is prepared, the internal pores are observed, the porosity is quantified using the imagepro software, and the pore size is detected using a two-dimensional measuring instrument.

[0070] The layered printing method is adopted to greatly shorten the tire mold forming time. The positioning holes on the tire mold are made into a small-layer thick breathable structure 79 and a large-layer thick breathable structure 80. There is no need to open them during tire preparation. After vulcanization, some areas with large roughness formed on the tire surface can be effectively solved, which greatly reduces the post-processing process and processing time, and saves costs.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A tire mold forming method based on SLM technology, characterized in that: The following steps are involved: Step 1: Using an SLM printing device to print in layers to produce a small layer thickness entity (77), wherein the thickness of the small layer thickness entity (77) is set to 2-3 mm, and a small layer thickness air permeable structure (79) is provided on the small layer thickness entity (77), and by adjusting the printing parameters of the SLM printing device, the inside of the small layer thickness air permeable structure (79) reaches a porous structure with a certain strength; Step 2, using an SLM printing device to print in layers to produce a large-layer-thick entity (78), a large-layer-thick breathable structure (80) is provided on the large-layer-thick entity (78), and two or more through holes are provided on the large-layer-thick breathable structure (80), and the inner diameter of all the through holes is 0.3-0.4 mm, and the through holes enable the large-layer-thick breathable structure (80) to achieve a good breathable effect; by adjusting the printing parameters of the SLM printing device, the interior of the large-layer-thick breathable structure (80) reaches a porous structure with a certain strength, so that the large-layer-thick breathable structure (80) and the small-layer-thick breathable structure (79) can be well breathed and communicated; Step 3, nesting the small layer thickness entity (77) and the large layer thickness entity (78) to form a tire mold; The SLM printing device comprises a base (1), a printer (2), a filter device (7), an air outlet pipe (9), a gas tank 1 (10), a gas tank 2 (11), a gas pipe 1 (12), a gas pipe 2 (13), a converter (14), an air inlet pipe (15) and an air return pipe (75). The printer (2) and the filter device (7) are both fixedly connected to the top wall of the base (1). The gas tank 1 (10) and the gas tank 2 (11) are both detachably connected to the top wall of the base (1). The filter device (7) is connected to the top wall of the base (1) through the air outlet pipe (9) and the air return pipe (75). The air pipe (75) is connected to the printer (2); the filter device (7) is provided with a filter chamber (8); a filter assembly is provided in the filter chamber (8); the filter assembly comprises a filter screen (68); the filter screen (68) is fixedly connected to the inner wall of the filter chamber (8); the air inlet pipe (15) is fixedly connected to the printer (2); the converter (14) is fixedly connected to the air inlet pipe (15); the first air tank (10) is connected to the converter (14) via the first air pipe (12); and the second air tank (11) is connected to the converter (14) via the second air pipe (13); The converter (14) is provided with an air intake passage (16) and a threaded passage (18) which are connected to each other. The air intake passage (16) is connected to the air intake pipe (15). The air pipe 1 (12) and the air pipe 2 (13) are both connected to the threaded passage (18). The threaded passage (18) is internally threaded with a threaded column (17). The threaded column (17) is provided with a through hole (171). The lower end of the threaded column (17) is fixedly connected with a transmission column (19). The lower end of the transmission column (19) is provided with a telescopic groove (20). The inner wall of the contraction groove (20) is slidably connected to a slider (22), the lower end of the slider (22) is fixedly connected to a threaded rod (62), a spur gear one (23) is fixedly connected to the threaded rod (62), the lower end of the threaded rod (62) is rotatably connected to the bottom wall of the filter chamber (8), the top wall of the filter device (7) is fixedly connected to a fixed plate (24), a motor (25) is slidably connected to the fixed plate (24), a spur gear two (26) is fixedly connected to the output shaft of the motor (25), and the spur gear two (26) and the spur gear one (23) are meshed; A cleaning member (63) is slidably connected to the inner wall of the filter chamber (8); a threaded hole (64) is formed on the cleaning member (63); a threaded rod (62) is threadedly connected to the inner wall of the threaded hole (64); bristles (65) are fixedly connected to the cleaning member (63); the bristles (65) and the filter screen (68) are in contact with each other.

2. A tire mold forming method based on SLM process according to claim 1, characterized in that: In the step 2, the adjustment of the printing parameters of the SLM printing device includes adjusting the process permeability parameters. After adjusting the process permeability parameters, the permeability parameters closest to the entity parameters are obtained, and then the metallographic phase is prepared to observe the internal pores of the thick permeable structure (80), the porosity is quantified using the imagepro software, and the pore size is detected using a two-dimensional measuring instrument.

3. The tire mold forming method based on SLM process according to claim 1 is characterized in that: The filter assembly further comprises a mesh frame (69), the mesh frame (69) being filled with a main purification ball (70), the mesh frame (69) being inlaid with a third permanent magnet (71), the bottom wall of the filter device (7) being rotatably connected to a baffle (72), the baffle (72) and the bottom wall of the mesh frame (69) being in contact with each other, the baffle (72) being connected to the filter device (7) via a fourth elastic member (73), and the baffle (72) supporting the mesh frame (69); The top wall of the filter cavity (8) is connected to the top wall of the filter device (7) through a transmission channel (58); a receiving groove (59) is provided on the side wall of the transmission channel (58); a permanent magnet second (60) is embedded in the side wall of the receiving groove (59); a storage box (41) is slidably connected to the inner wall of the transmission channel (58); a storage cavity (42) is provided on the storage box (41); the storage cavity (42) is filled with spare purification balls (43); a sheet groove (50) is provided on the bottom wall of the storage box (41); a sliding plate (52) is slidably connected to the inner wall of the sheet groove (50); the sliding plate (52) is connected to the side wall of the sheet groove (50) through an elastic member third (51); a blocking plate (54) is slidably connected to the bottom wall of the storage box (41); the blocking plate (54) supports the spare purification balls (43); and the blocking plate (54) supports the spare purification balls (43). A permanent magnet 1 (53) is fixedly connected to the plate (54), the permanent magnet 1 (53) and the sliding plate (52) are fixedly connected, an embedding plate (55) is fixedly connected to the blocking plate (54), a pressure strip (56) is fixedly connected to the bottom wall of the storage box (41), an embedding groove (57) is provided on the pressure strip (56), a push-type elastic self-locking mechanism is provided in the embedding groove (57), the embedding plate (55) and the push-type elastic self-locking mechanism are locked, a tooth groove (45) is provided on the side wall of the storage box (41), a transmission tooth (46) is fixedly connected to the inner wall of the tooth groove (45), a connecting plate (47) and an extension rod (48) are fixedly connected to the storage box (41), the bottom wall of the connecting plate (47) is connected to the top wall of the filter device (7) through an elastic member 2 (44), and a rack (49) is fixedly connected to the extension rod (48); The transmission column (19) is fixedly connected to a pressing plate (21), the bottom wall of the spur gear 2 (26) is fixedly connected to a worm (27), the fixed plate (24) is rotatably connected to a spur gear 3 (29) and a spur gear 4 (30), the spur gear 4 (30) and the transmission tooth (46) are meshed, the spur gear 3 (29) is fixedly connected to a worm wheel (28), the worm wheel (28) and the worm (27) are meshed, the fixed plate (24) is slidably connected to a moving seat (32), the moving seat (32) is rotatably connected to a spur gear 5 (31 ), a connecting piece (34) and a supporting plate (40) are fixedly connected to the fixing plate (24), the connecting piece (34) is connected to the movable seat (32) via an elastic member (33), the connecting piece (34) is connected to the movable seat (32) via an airbag ball (35), an inflatable ball (37) is fixedly connected to the supporting plate (40), an air valve (38) is fixedly connected to the inflatable ball (37), a gear-shaped knob switch (39) is rotatably connected to the air valve (38), and the air valve (38) is connected to the airbag ball (35) via a conduit (36).

4. The tire mold forming method based on SLM process according to claim 3 is characterized in that: The filter device (7) is provided with a vibration chamber (61), an impact piece (66) is fixedly connected to the threaded rod (62), the filter screen (68) extends into the vibration chamber (61), a vibration piece (67) is fixedly connected to the filter screen (68), and both the impact piece (66) and the vibration piece (67) are located in the vibration chamber (61).

5. The tire mold forming method based on SLM process according to claim 4 is characterized in that: The top wall of the base (1) is detachably connected to a recovery box (76).

6. The tire mold forming method based on SLM process according to claim 5 is characterized in that: The bottom wall of the filter chamber (8) is detachably connected to a recoverer (74).

7. The tire mold forming method based on SLM process according to claim 6 is characterized in that: The printer (2) is movably connected to a door (5).

8. The tire mold forming method based on SLM process according to claim 7 is characterized in that: The printer (2) is fixedly connected to a vacuum pump (3) and a temperature detector (4), and the filter device (7) is fixedly connected to the top wall of the base (1) via a bracket (6).

9. A tire mold, characterized in that: The tire mold is made by using the tire mold forming method based on the SLM process as described in any one of claims 1-8.

Images