Raw material crushing device for producing cyclic thermosetting powder coating

Abstract

The application discloses a raw material crushing device for producing ring thermosetting powder coating, which is applied to the field of crushing ring thermosetting powder coating raw materials and comprises a crushing tank, wherein an opening and closing assembly is arranged on the upper end face of a tank cover. In the rotating process of a rotating shaft, a driving bevel gear drives a driven bevel gear and a speed reducer to rotate a reciprocating lead screw at a low speed, so that a connecting plate drives a blocking plate to move leftward and rightward to open and close a feeding cavity, thereby intermittently discharging raw materials in a feeding cylinder, avoiding that all the raw materials in the feeding cylinder fall into the crushing tank at the same time and increasing the instantaneous load of a crushing assembly. The speed regulating motor drives a cam head to rotate through a transmission shaft to intermittently press a pressure plate, and meanwhile, a reset spring exerts an upward extrusion force on the pressure plate, so that the pressure plate drives multiple crushing teeth to move up and down to preliminarily crush raw material pieces around, thereby improving the crushing efficiency of the subsequent raw material pieces.

Description

Technical Field

[0001] This invention relates to the field of raw material crushing for cyclic thermosetting powder coatings, and particularly to a raw material crushing device for the production of cyclic thermosetting powder coatings. Background Technology

[0002] Thermosetting powder coatings are composed of thermosetting resins, curing agents, pigments, fillers, and additives, and are processed into powder form through physical and mechanical processing. In the production process of thermosetting powder coatings, the weighed raw materials are put into a high-speed mixer for dry mixing. The mixed raw materials are then melted, sheared, dispersed, and extruded through a twin-screw extruder. The extruded strips enter a cooling conveyor belt (with built-in cooling water circulation) and are cooled by spraying or contact. The cooled strips then enter a tablet press to be pressed into thin sheets. The raw materials pressed into thin sheets are then crushed by a crushing device. Finally, the crushed raw materials are sieved to remove impurities and powders with unqualified particle sizes, resulting in powder coating products that meet the requirements.

[0003] A search of Chinese patents revealed that, according to publication number CN222469254U, a raw material crushing device for the production of cyclic thermosetting powder coatings is used. The device controls the lifting and lowering of the crushing cylinder through a lifting raw material holding mechanism and, in conjunction with a tilting drive mechanism, controls the tilting of the crushing cylinder. This allows the powder raw material inside the crushing cylinder to be poured onto the bottom inner wall of the material tank, making the material handling of the device more convenient.

[0004] The feeding hopper in this crushing device lacks intermittent feeding capability, causing the raw materials to all fall into the crushing drum after being poured into the feeding hopper. At this time, the instantaneous load on the drive motor and crushing blades will suddenly increase. Repeated occurrences will reduce the service life of the drive motor and crushing blades. Furthermore, the feeding hopper in this crushing device cannot pre-crush the raw materials, which not only increases the wear of the crushing blades but also reduces the crushing efficiency of the crushing blades. To solve the above problems, we propose a raw material crushing device for the production of cyclic thermosetting powder coatings. Summary of the Invention

[0005] The purpose of this invention is to provide a raw material crushing device for the production of cyclic thermosetting powder coatings. Its advantages are that it has the ability to feed intermittently and pre-crush the raw materials, thereby ensuring the efficiency and uniformity of subsequent crushing.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a raw material crushing device for the production of cyclic thermosetting powder coatings, comprising a crushing tank and a tank cover, wherein the tank cover is bolted to the upper end face of the crushing tank, a stabilizing bracket is welded to the lower side of the annular side of the crushing tank, a feeding cylinder is welded to the right side of the upper end face of the tank cover, a crushing component is provided inside the crushing tank, an opening and closing component is provided on the upper end face of the tank cover, a pre-crushing component is provided above the feeding cylinder, and a pneumatic powder butterfly valve is bolted to the bottom of the crushing tank, and the outlet end of the pneumatic powder butterfly valve is connected to the inlet of an external powder screening equipment through a pipeline.

[0007] By adopting the above technical solution, the installation of the tank cover not only seals the opening at the top of the crushing tank, but also facilitates subsequent maintenance and cleaning of the inside of the crushing tank. The welded stabilizing bracket provides stable support for the crushing tank, preventing swaying and displacement during use. The welded feeding cylinder allows workers to easily feed raw material pieces into the crushing tank. The crushing components crush and grind the raw materials entering the crushing tank. The opening and closing components allow for intermittent feeding of raw materials from the feeding cylinder, preventing all the raw materials from falling into the crushing tank and causing a sudden increase in the instantaneous load on the crushing components, thus ensuring their service life. The pre-crushing components pre-crush the raw material pieces remaining inside the feeding cylinder, thereby accelerating the crushing efficiency of the subsequent crushing components.

[0008] The invention is further configured such that: the crushing component includes a rotating shaft, which is inserted into the middle of the inside of the tank cover; the upper end of the rotating shaft is connected to a servo motor via a coupling; the servo motor is electrically connected to an external servo controller via a wire; a transmission roller is welded to the lower end of the rotating shaft; multiple crushing rods are staggered welded to the annular side of the transmission roller; a crushing hammer is welded to the annular side of the crushing rod; and a motor bracket is welded to the rear side of the upper end face of the tank cover.

[0009] By adopting the above technical solution, the installation of a rotating shaft facilitates the servo motor to drive the transmission roller to rotate at the required speed. By welding the transmission roller together, multiple crushing rods can be driven to rotate. By welding multiple crushing rods and crushing hammers, the raw materials entering the crushing roller can be crushed. By welding the motor bracket, the servo motor can be supported and fixed.

[0010] The present invention is further configured such that: the opening and closing assembly includes a driving bevel gear, the driving bevel gear is welded to the upper side of the annular side of the rotating shaft, a driven bevel gear meshes with the right side of the annular side of the driving bevel gear, a reducer is connected to the right end of the driven bevel gear through a coupling, a reciprocating screw is connected to the lower side of the right end face of the reducer through a coupling, a connecting plate is connected to the right side of the annular side of the reciprocating screw, and a blocking plate is welded to the bottom of the connecting plate.

[0011] By adopting the above technical solution, the rotating shaft can drive the reducer to rotate through the driven bevel gear by welding the active bevel gear. At this time, the reducer will reduce the high speed transmitted by the driven bevel gear and drive the reciprocating screw to rotate at a low speed. The reciprocating screw rotating at a low speed will drive the connecting plate to move slowly left and right through the sliding cavity, so that the connecting plate drives the blocking plate to move slowly left and right in sync, thereby intermittently feeding the raw material in the feeding cylinder. Since the internal detailed structure and working principle of the reducer are relatively mature technologies in the existing technology, they will not be described in detail here.

[0012] The invention is further configured such that: the pre-crushing component includes a rectangular vertical rod, which is vertically installed at the center of the feeding cylinder and extends through the support frame; multiple extension rods are staggered welded to the lower side of the outer surface of the rectangular vertical rod; a pressure plate is bolted to the upper end of the rectangular vertical rod; a support frame is welded to the right side of the upper end face of the tank cover; a speed-regulating motor is bolted to the upper end face of the support frame; the speed-regulating motor is electrically connected to an external motor speed controller via a wire; a drive shaft is connected to the front end of the speed-regulating motor via a coupling; a cam head is welded to the front end of the drive shaft, and the bottom of the cam head contacts the upper end face of the pressure plate.

[0013] By adopting the above technical solution, the vertically installed rectangular vertical rod can support the extension rod. By staggered welding of multiple extension rods, multiple crushing teeth can be supported, so that the crushing teeth can crush most of the raw material flakes in the feeding cylinder during the up and down movement. By installing a pressure plate, the rotating cam head can apply downward pressure to the rectangular vertical rod. By welding a support frame, not only can the speed-regulating motor be supported and fixed, but the rectangular vertical rod can also be limited to prevent it from shaking or rotating during use. By installing a speed-regulating motor, the cam head can be driven to rotate at the required speed through the transmission shaft.

[0014] The invention is further configured such that: multiple crushing teeth are symmetrically welded on the upper and lower sides of the annular side of the extension rod, and a return spring is fitted on the upper side of the outer surface of the rectangular vertical rod.

[0015] By adopting the above technical solution, multiple crushing teeth are welded together to crush the surrounding raw material pieces during the up-and-down movement. By installing a reset spring, an upward squeezing force can be applied to the pressure plate so that when the cam head rotates to a specified angle, the pressure plate will drive the rectangular vertical rod to move upward.

[0016] The present invention is further configured such that: a feeding cavity is provided on the right side of the upper end face of the can lid, and the inner diameter of the feeding cavity is the same as the inner diameter of the feeding cylinder; a limiting cavity is provided on the left side of the inner wall of the feeding cavity, and the limiting cavity matches the baffle plate; the right end face of the baffle plate is semi-circular, and the front and rear width of the baffle plate is the same as the inner diameter of the feeding cavity.

[0017] By adopting the above technical solution, by opening the feeding cavity, the raw materials inside the feeding cylinder can fall down into the crushing tank under gravity. By opening the limiting cavity, the baffle plate can move left and right inside the tank cover. By setting the right end face of the baffle plate to be semi-circular, the right end face and the front and rear sides of the baffle plate can fit more closely with the inner wall of the feeding cavity.

[0018] The present invention is further configured such that: an avoidance groove is provided on the right side of the upper end face of the can lid, and the avoidance groove matches the connecting plate; the avoidance groove is connected to the limiting cavity; and a sliding cavity is provided on the upper side inside the connecting plate, and the sliding cavity matches the reciprocating screw.

[0019] By adopting the above technical solution, the connecting plate can move left and right on the upper surface of the can lid by opening the clearance groove, and the rotating reciprocating screw can drive the connecting plate to move left and right by opening the sliding cavity. Since the detailed working principle and internal structure of the reciprocating screw are relatively mature technologies in the existing technology, they will not be described in detail here.

[0020] The invention is further configured such that: an expansion hopper is welded to the upper end face of the feeding cylinder, and the expansion hopper is conical; a guide plate is welded to the right side of the inner annular side of the crushing tank, and the guide plate has an inclination angle of 60°.

[0021] By adopting the above technical solution, the expansion bucket, which is welded into a cone shape, not only makes it convenient for workers to feed materials into the feeding cylinder, but also increases the temporary storage space of the feeding cylinder. By welding a guide plate with an inclination angle of 60°, the raw materials that slide down through the feeding cavity can be guided to the cone-shaped guide surface at the top of the transmission roller for dispersion.

[0022] The invention is further configured such that: four linkage shafts are symmetrically welded to the left and right sides and the front and rear sides of the bottom of the transmission roller; a crushing disc is welded to the lower end of the linkage shaft; the crushing disc has grinding patterns on its annular side; the crushing disc is clearance-fitted with the inner diameter of the bottom of the crushing tank; and multiple crushing heads are bolted to the annular side of the crushing tank.

[0023] By adopting the above technical solution, the welding linkage shaft facilitates the synchronous rotation of the crushing disc and the transmission roller. The crushing disc with grinding patterns on the annular side can grind the surrounding raw materials when rotating. The crushing disc with a clearance fit between it and the inner diameter of the bottom of the crushing tank also facilitates the crushed raw materials to fall into it for grinding. By installing multiple crushing heads, the crushing effect of the breaker hammer can be further improved.

[0024] The present invention is further configured such that: the upper end face of the transmission roller and the upper end face of the crushing grinding disc are both provided with a tapered guide surface, and a through hole is provided in the middle position of the upper end face of the can cover, and the through hole matches the rotating shaft.

[0025] By adopting the above technical solution, the conical guide surface can be set to disperse and guide the raw materials falling on the upper surface of the transmission roller and the crushing disc. By opening the through hole, it is convenient for the rotating shaft to be inserted into the inside of the can lid for use.

[0026] In summary, the present invention has the following beneficial effects:

[0027] 1. In the operation of the servo motor, the rotating shaft drives the reducer through the active bevel gear and the driven bevel gear, which in turn drives the reciprocating screw to rotate at low speed. The reciprocating screw rotates at low speed and drives the blocking plate to move left and right through the connecting plate to open and close the feeding cavity. This allows the raw material in the feeding cylinder to be fed intermittently, thereby preventing all the raw material in the feeding cylinder from falling into the crushing tank and increasing the instantaneous load on the crushing components, thus ensuring the service life of the crushing components.

[0028] 2. By starting the speed-regulating motor, the speed-regulating motor can drive the cam head to rotate through the transmission shaft. During this process, the rotating cam head will intermittently press down on the pressure plate, while the return spring will apply an upward squeezing force to the pressure plate, causing the pressure plate to drive multiple crushing teeth to move up and down together through the rectangular vertical rod and the extension rod. This allows the multiple crushing teeth to pre-crush the surrounding raw material pieces, thereby improving the subsequent crushing efficiency of the raw material pieces.

[0029] 3. By starting the servo motor, the servo motor can drive the transmission roller to rotate via the rotating shaft. The transmission roller will drive the crushing rod and the crushing hammer to rotate together to crush the surrounding raw materials. In addition, multiple crushing heads can further improve the crushing effect of the crushing hammer. At the same time, the transmission roller will drive the grinding disc to rotate together via the linkage shaft to grind the crushed raw materials, resulting in a good crushing effect. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural view of the present invention;

[0031] Figure 2This is a left view of the crushing component, opening and closing component, and pre-crushing component in this invention;

[0032] Figure 3 This is a three-dimensional cross-sectional view of the crushing tank in this invention;

[0033] Figure 4 This is a structural diagram of the opening and closing component in this invention;

[0034] Figure 5 This is a structural diagram of the can lid in this invention;

[0035] Figure 6 This is a structural diagram of the pre-crushing component in this invention;

[0036] Figure 7 This is a structural diagram of the connecting plate and the blocking plate in this invention.

[0037] Reference numerals: 1. Stabilizing bracket; 2. Crushing tank; 3. Tank cover; 31. Through hole; 4. Crushing assembly; 41. Rotating shaft; 42. Motor bracket; 43. Servo motor; 44. Crushing head; 45. Crusher hammer; 46. Crushing rod; 47. Drive roller; 48. Linkage shaft; 49. Crushing disc; 5. Opening and closing assembly; 51. Driving bevel gear; 52. Driven bevel gear; 53. Reducer; 54. Guide plate; 55. Reciprocating lead screw; 56. Connecting plate; 561. Sliding cavity; 57. Baffle plate; 58. Clearance groove; 59. Limiting cavity; 511. Feeding cavity; 6. Feeding cylinder; 61. Expansion hopper; 7. Pre-crushing assembly; 71. Rectangular vertical rod; 72. Pressure plate; 73. Speed ​​regulating motor; 74. Support frame; 75. Return spring; 76. Extension rod; 761. Crushing teeth; 77. Drive shaft; 78. Cam head. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings.

[0039] Example 1:

[0040] refer to Figure 1A raw material crushing device for the production of cyclic thermosetting powder coatings includes a crushing tank 2 and a tank cover 3. The tank cover 3 is bolted to the upper end face of the crushing tank 2. A stabilizing bracket 1 is welded to the lower side of the annular side of the crushing tank 2. A feeding cylinder 6 is welded to the right side of the upper end face of the tank cover 3. A crushing component 4 is installed inside the crushing tank 2. An opening and closing component 5 is installed on the upper end face of the tank cover 3. A pre-crushing component 7 is installed above the feeding cylinder 6. A pneumatic powder butterfly valve 8 is bolted to the bottom of the crushing tank 2, and the outlet end of the pneumatic powder butterfly valve 8 is connected to the inlet of an external powder screening equipment through a pipeline. The bolted connection of the pneumatic powder butterfly valve 8 not only facilitates the control of the material discharge at the bottom of the crushing tank 2 by the operator, but also facilitates the screening of the ground raw materials by the external powder screening equipment. By installing the tank cover 3, the opening at the upper end face of the crushing tank 2 can be sealed, and it also facilitates the later maintenance personnel to inspect and clean the inside of the crushing tank 2. The stabilizing bracket 1 provides stable support for the crushing tank 2, preventing it from shaking or shifting during use. The welded feeding cylinder 6 allows workers to easily feed raw material pieces into the crushing tank 2. The crushing assembly 4 crushes and grinds the raw material entering the crushing tank 2. The opening and closing assembly 5 allows for intermittent feeding of the raw material from the feeding cylinder 6, preventing it from all falling into the crushing tank 2 and thus avoiding a sudden increase in the load on the crushing assembly 4, thereby ensuring its service life. The pre-crushing assembly 7 pre-crushes the raw material pieces remaining in the feeding cylinder 6, accelerating the crushing efficiency of the subsequent crushing assembly 4. Furthermore, during use, workers can install external industrial dust collection equipment nearby to filter out ambient dust as needed.

[0041] refer to Figure 2 and Figure 3 The crushing assembly 4 includes a rotating shaft 41, which is inserted into the middle of the inside of the can lid 3. The upper end of the rotating shaft 41 is connected to a servo motor 43 via a coupling. The servo motor 43 is electrically connected to an external servo controller via wires. The lower end of the rotating shaft 41 is welded to a transmission roller 47. Multiple crushing rods 46 are staggered welded to the annular side of the transmission roller 47. Crushing hammers 45 are welded to the annular side of the crushing rods 46. A motor bracket 42 is welded to the rear side of the upper end face of the can lid 3. By installing the rotating shaft 41, the servo motor 43 can drive the transmission roller 47 to rotate at the required speed. By welding the transmission roller 47, multiple crushing rods 46 can be driven to rotate. By welding multiple crushing rods 46 and crushing hammers 45, the raw materials entering the crushing roller can be crushed. By welding the motor bracket 42, the servo motor 43 can be supported and fixed.

[0042] refer to Figure 3 and Figure 5Four linkage shafts 48 are symmetrically welded to the left and right sides and the front and rear sides of the bottom of the drive roller 47. A crushing disc 49 is welded to the lower end of the linkage shaft 48, and the annular side of the crushing disc 49 is provided with grinding patterns. The crushing disc 49 and the inner diameter of the bottom of the crushing tank 2 are clearance fit. Multiple crushing heads 44 are bolted to the annular side of the crushing tank 2. By welding the linkage shafts 48, the crushing disc 49 and the drive roller 47 can rotate synchronously. By welding the crushing disc 49 with grinding patterns on the annular side, it can grind the surrounding raw materials when rotating. The crushing disc 49, which is fitted with a gap between itself and the inner diameter of the bottom of the crushing tank 2, facilitates the crushed raw materials to fall into it for grinding. By installing multiple crushing heads 44, the crushing effect of the crushing hammer 45 can be further improved. The upper end face of the transmission roller 47 and the upper end face of the crushing disc 49 are both provided with conical guide surfaces. A through hole 31 is opened in the middle of the upper end face of the tank cover 3, and the through hole 31 is matched with the rotating shaft 41. By setting the conical guide surfaces, the raw materials falling on the upper end face of the transmission roller 47 and the crushing disc 49 can be dispersed and guided.

[0043] Example 2:

[0044] refer to Figure 2 and Figure 4 The opening and closing assembly 5 includes a driving bevel gear 51, which is welded to the upper side of the annular side of the rotating shaft 41. A driven bevel gear 52 meshes with the right side of the annular side of the driving bevel gear 51. A reducer 53 is connected to the right end of the driven bevel gear 52 via a coupling. A reciprocating screw 55 is connected to the lower side of the right end face of the reducer 53 via a coupling. A connecting plate 56 is connected to the right side of the annular side of the reciprocating screw 55. A blocking plate 57 is welded to the bottom of the connecting plate 56. By welding the driving bevel gear 51, the rotating shaft 41 can drive the reducer 53 to rotate via the driven bevel gear 52. At this time, the reducer 53 will... The high-speed transmission from the driven bevel gear 52 is reduced, driving the reciprocating screw 55 to rotate at a low speed. The low-speed rotating reciprocating screw 55 drives the connecting plate 56 to move slowly left and right through the sliding cavity 561. This causes the connecting plate 56 to drive the blocking plate 57 to move slowly left and right in sync, opening and closing, thereby intermittently feeding the raw material into the feeding cylinder 6. Since the detailed internal structure and working principle of the reducer 53 are relatively mature technologies in the existing field, they will not be described in detail here. During the use of this device, a corresponding dust cover needs to be installed on the outside of the transmission structure in the opening and closing assembly 5. Figure 1 (As shown in the drawing), to prevent dust or powder from adhering to the outer surface of the transmission structure and causing jamming.

[0045] refer to Figure 4 and Figure 5A feeding cavity 511 is provided on the right side of the upper end face of the can lid 3, and the inner diameter of the feeding cavity 511 is the same as the inner diameter of the feeding cylinder 6. A limiting cavity 59 is provided on the left side of the inner wall of the feeding cavity 511, and the limiting cavity 59 matches the baffle plate 57. The right end face of the baffle plate 57 is semi-circular, and the front and rear width of the baffle plate 57 is the same as the inner diameter of the feeding cavity 511. By providing the feeding cavity 511, the raw materials inside the feeding cylinder 6 can fall down into the crushing tank 2 under gravity. By providing the limiting cavity 59, the baffle plate 57 can move left and right inside the can lid 3. By setting the right end face of the baffle plate 57 to be semi-circular, the right end face and the front and rear sides of the baffle plate 57 can fit more closely with the inner wall of the feeding cavity 511.

[0046] refer to Figure 2 , Figure 4 , Figure 5 and Figure 7 A clearance groove 58 is provided on the right side of the upper end face of the can lid 3, and the clearance groove 58 matches the connecting plate 56. The clearance groove 58 is connected to the limiting cavity 59, and a sealing layer (not shown in the figure) is provided between the clearance groove 58 and the limiting cavity 59 to prevent dust generated during the crushing process from flying out through the gap between the clearance groove 58 and the limiting cavity 59. The left and right reciprocating range of the connecting plate 56 is less than the left and right length of the clearance groove 58 to prevent the connecting plate 56 from driving the blocking plate 57 to overtravel and damage the reducer 53 and the reciprocating screw 55. A sliding cavity 561 is provided on the upper side of the inside of the connecting plate 56, and the sliding cavity 561 matches the reciprocating screw 55. By providing the clearance groove 58, the connecting plate 56 can move left and right on the upper end face of the can lid 3. By providing the sliding cavity 561, the rotating reciprocating screw 55 can move left and right. The connecting plate 56 can be moved left and right. Since the detailed working principle and internal structure of the reciprocating screw 55 are relatively mature technologies in the existing technology, they will not be described in detail here. An expansion bucket 61 is welded to the upper end face of the feeding cylinder 6, and the expansion bucket 61 is conical. A guide plate 54 is welded to the right side of the inner annular side of the crushing tank 2, and the guide plate 54 is inclined at an angle of 60°. By welding the conical expansion bucket 61, it is not only convenient for the staff to feed materials into the feeding cylinder 6, but also increases the temporary storage space of the feeding cylinder 6. By welding the guide plate 54 with an inclination angle of 60°, the raw materials that slide down through the feeding cavity 511 can be guided to the conical guide surface at the upper end of the transmission roller 47 for dispersion. By opening the through hole 31, it is convenient for the rotating shaft 41 to be inserted into the tank cover 3 for use.

[0047] Example 3:

[0048] refer to Figure 2 and Figure 6The pre-crushing component 7 includes a rectangular vertical rod 71, which is vertically installed at the center of the feeding cylinder 6 and extends through the support frame 74. Multiple extension rods 76 are staggered welded to the lower outer surface of the rectangular vertical rod 71. A pressure plate 72 is bolted to the upper end of the rectangular vertical rod 71. A support frame 74 is welded to the right side of the upper surface of the tank cover 3. A speed-regulating motor 73 is bolted to the upper surface of the support frame 74. The speed-regulating motor 73 is electrically connected to an external motor speed controller via a wire. A drive shaft 77 is connected to the front end of the speed-regulating motor 73 via a coupling. A cam head 78 is welded to the front end of the drive shaft 77, and the bottom of the cam head 78 contacts the upper surface of the pressure plate 72. The vertical installation... The rectangular vertical rod 71 supports the extension rod 76. By staggering the welding of multiple extension rods 76, multiple crushing teeth 761 can be supported so that the crushing teeth 761 can crush most of the raw material pieces in the feeding cylinder 6 during the up and down movement. By installing the pressure plate 72, the rotating cam head 78 can apply downward pressure to the rectangular vertical rod 71. By welding the support frame 74, not only can the speed-regulating motor 73 be supported and fixed, but the rectangular vertical rod 71 can also be limited to prevent the rectangular vertical rod 71 from shaking or rotating during use. By installing the speed-regulating motor 73, the cam head 78 can be driven to rotate at the required speed through the transmission shaft 77.

[0049] refer to Figure 6 The extension rod 76 has multiple crushing teeth 761 symmetrically welded on the upper and lower sides of its annular side. A return spring 75 is fitted on the upper side of the outer surface of the rectangular vertical rod 71. By welding multiple crushing teeth 761, it can crush the surrounding raw material pieces during the up and down movement. By fitting the return spring 75, it can apply an upward squeezing force to the pressure plate 72 so that when the cam head 78 rotates to a specified angle, the pressure plate 72 will drive the rectangular vertical rod 71 to move upward.

[0050] Brief description of the usage process: During the production of ring-shaped thermosetting powder coatings, the operator first starts the servo motor 43, which drives the active bevel gear 51 to rotate via the rotating shaft 41. The active bevel gear 51 then drives the reducer 53 via the driven bevel gear 52. At this time, the reducer 53 reduces the high speed transmitted from the driven bevel gear 52 and drives the reciprocating screw 55 to rotate at a low speed. The low-speed rotating reciprocating screw 55 drives the blocking plate 57 to move to the right via the connecting plate 56. The movement continues until the blocking plate 57 contacts the right side of the inner wall of the feed passage 511, at which point the servo motor 43 is turned off, so that the blocking plate 57 continuously blocks the feed passage. After sealing cavity 511, an appropriate amount of raw material flakes to be crushed can be poured into feeding cylinder 6. After pouring, start speed regulating motor 73, which drives cam head 78 to rotate through transmission shaft 77. During this process, rotating cam head 78 will intermittently press down on pressure plate 72, while return spring 75 will apply upward squeezing force to pressure plate 72, causing pressure plate 72 to drive rectangular vertical rod 71 to move up and down reciprocally. Rectangular vertical rod 71 will drive multiple crushing teeth 761 to move up and down together through extension rod 76, thereby causing multiple crushing teeth 761 to pre-crush the surrounding raw material flakes, thereby improving the crushing efficiency of subsequent raw material flakes.

[0051] Once the raw material flakes are shredded to the desired state, the operator can restart the servo motor 43. The servo motor 43 drives the transmission roller 47 to rotate via the rotating shaft 41. The transmission roller 47 then drives the crushing rod 46 and the crushing hammer 45 to rotate together. Furthermore, the transmission roller 47 drives the crushing grinding disc 49 to rotate via the linkage shaft 48. Simultaneously, the driving bevel gear 51, which rotates with the rotating shaft 41, drives the reducer 53 again via the driven bevel gear 52. The reducer 53 then drives the reciprocating screw 55 to rotate at a low speed. This low-speed rotating reciprocating screw 55 drives the blocking plate 57 to move left and right reciprocally via the connecting plate 56, thereby regulating the feed passage 511. The opening and closing operation allows for intermittent feeding of the raw materials in the feeding cylinder 6, preventing all the raw materials in the feeding cylinder 6 from falling into the crushing tank 2 and increasing the instantaneous load on the crushing component 4, thereby ensuring the service life of the crushing component 4. The raw materials falling downward through the feeding passage 511 are guided by the guide plate 54 to the conical guide surface at the upper end of the transmission roller 47 and dispersed in all directions. The dispersed raw materials are first crushed by the crushing hammer 45, crushing rod 46 and crushing head 44. Then, the crushed raw materials continue to slide downward to the bottom of the crushing roller and are ground by the rotating crushing disc 49. Finally, the ground raw materials fall downward and are discharged by the external conveyor belt to the next process.

[0052] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0053] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A raw material crushing device for the production of cyclic thermosetting powder coatings, comprising a crushing tank (2) and a tank cover (3), characterized in that, The crushing tank (2) is bolted with a tank cover (3) on its upper end face. A stabilizing bracket (1) is welded to the lower side of the annular side of the crushing tank (2). A feeding cylinder (6) is welded to the right side of the upper end face of the tank cover (3). A crushing component (4) is installed inside the crushing tank (2). An opening and closing component (5) is installed on the upper end face of the tank cover (3). A pre-crushing component (7) is installed above the feeding cylinder (6).

2. The raw material crushing device for producing cyclic thermosetting powder coatings according to claim 1, characterized in that, The crushing assembly (4) includes a rotating shaft (41) which is inserted in the middle of the inside of the can cover (3). The upper end of the rotating shaft (41) is connected to a servo motor (43) via a coupling. The lower end of the rotating shaft (41) is welded to a transmission roller (47). Multiple crushing rods (46) are staggered on the annular side of the transmission roller (47). A crushing hammer (45) is welded to the annular side of the crushing rod (46). A motor bracket (42) is welded to the rear side of the upper end face of the can cover (3).

3. The raw material crushing device for producing cyclic thermosetting powder coatings according to claim 2, characterized in that, The opening and closing assembly (5) includes a driving bevel gear (51), which is welded to the upper side of the annular side of the rotating shaft (41). A driven bevel gear (52) meshes with the right side of the annular side of the driving bevel gear (51). A reducer (53) is connected to the right end of the driven bevel gear (52) via a coupling. A reciprocating screw (55) is connected to the lower side of the right end face of the reducer (53) via a coupling. A connecting plate (56) is connected to the right side of the annular side of the reciprocating screw (55). A blocking plate (57) is welded to the bottom of the connecting plate (56).

4. The raw material crushing device for producing cyclic thermosetting powder coatings according to claim 1, characterized in that, The pre-crushing component (7) includes a rectangular vertical rod (71), which is vertically installed at the center of the feeding cylinder (6). Multiple extension rods (76) are staggered on the lower side of the outer surface of the rectangular vertical rod (71). A pressure plate (72) is bolted to the upper end of the rectangular vertical rod (71). A support frame (74) is welded to the right side of the upper end face of the can cover (3). A speed-regulating motor (73) is bolted to the upper end face of the support frame (74). A transmission shaft (77) is connected to the front end of the speed-regulating motor (73) through a coupling. A cam head (78) is welded to the front end of the transmission shaft (77), and the bottom of the cam head (78) is in contact with the upper end face of the pressure plate (72).

5. The raw material crushing device for producing cyclic thermosetting powder coatings according to claim 4, characterized in that, The extension rod (76) has multiple crushing teeth (761) symmetrically welded on the upper and lower sides of its annular side, and a return spring (75) is fitted on the upper side of the outer surface of the rectangular vertical rod (71).

6. The raw material crushing device for producing cyclic thermosetting powder coatings according to claim 3, characterized in that, The upper right side of the can lid (3) is provided with a feeding cavity (511), and the inner diameter of the feeding cavity (511) is the same as the inner diameter of the feeding cylinder (6). A limiting cavity (59) is provided on the left side of the inner wall of the feeding cavity (511), and the limiting cavity (59) matches the baffle plate (57). The right end face of the baffle plate (57) is semi-circular.

7. The raw material crushing device for producing cyclic thermosetting powder coatings according to claim 3, characterized in that, The upper right side of the can lid (3) is provided with a relief groove (58), and the relief groove (58) matches the connecting plate (56). The upper side of the connecting plate (56) is provided with a sliding cavity (561), and the sliding cavity (561) matches the reciprocating screw (55).

8. The raw material crushing device for producing cyclic thermosetting powder coatings according to claim 1, characterized in that, The upper end face of the feeding cylinder (6) is welded with an expansion bucket (61), and the expansion bucket (61) is conical. The right side of the inner annular side of the crushing tank (2) is welded with a guide plate (54), and the guide plate (54) has an inclination angle of 60°. The bottom of the crushing tank (2) is bolted with a pneumatic powder butterfly valve (8), and the outlet end of the pneumatic powder butterfly valve (8) is connected to the inlet of the external powder screening equipment through a pipe.

9. A raw material crushing device for producing cyclic thermosetting powder coatings according to claim 2, characterized in that, Four linkage shafts (48) are symmetrically welded to the bottom left and right sides and front and back sides of the transmission roller (47). A crushing grinding disc (49) is welded to the lower end of the linkage shaft (48), and the crushing grinding disc (49) has grinding patterns on its annular side. The crushing grinding disc (49) and the inner diameter of the bottom of the crushing tank (2) are in clearance fit. Multiple crushing heads (44) are bolted to the annular side of the crushing tank (2).

10. A raw material crushing device for producing cyclic thermosetting powder coatings according to claim 9, characterized in that, The upper end face of the transmission roller (47) and the upper end face of the crushing grinding disc (49) are both provided with a conical guide surface. A through hole (31) is provided in the middle of the upper end face of the can cover (3), and the through hole (31) matches the rotating shaft (41).

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