A self-cleaning mechanism for mold cavity and its injection molding machine

Abstract

This invention discloses a self-cleaning mechanism for mold cavities and its corresponding injection molding machine, relating to the field of mold cavity cleaning technology for injection molding machines. It aims to solve the technical problem of difficult cleaning of deep cavity dead corners and stubborn impurities in molds. The mechanism includes a moving module, a stationary module, a cleaning mechanism, and a control component. This invention uses a sliding ring inside and outside the deep cavity to trigger the control component, switching the connection state of the outer and inner fan blades to achieve automatic adaptation of the cleaning mode. When the moving ring slides into the deep cavity, the outer and inner fan blades are fixed and rotate at an angle, generating a highly penetrating spiral flow. Combined with the axial jet from the transmission cylinder, this effectively solves the problems of difficult cleaning of deep cavity dead corners and insufficient axial impact force. When the moving ring slides out of the deep cavity, the outer fan blades rotate independently, narrowing the flow channel to form a high-pressure annular jet. Through the negative pressure suction effect generated by the convergence with the axial jet, large impurities are thoroughly removed and secondary adhesion is prevented, achieving precise and non-damaging full-coverage cleaning of the cylindrical mold cavity.

Description

Technical Field

[0001] This invention relates to the field of injection molding machine cavity cleaning technology, and more specifically, to a cavity self-cleaning mechanism and an injection molding machine thereof. Background Technology

[0002] During long-term use, traditional injection molds are prone to leaving contaminants such as release agents and carbonized plastics on the inner wall of the mold cavity. In particular, the bottom of cylindrical mold cavities with a large depth-to-diameter ratio are difficult to reach due to the attenuation of airflow energy. Conventional air-blowing cleaning has the problem that the axial impact force decreases sharply with the distance, resulting in poor cleaning effect in deep cavity areas. The accumulation of residues affects the surface quality of the product and the life of the mold. Frequent shutdowns for manual cleaning seriously drag down production efficiency.

[0003] Existing cleaning devices mostly adopt a fixed flow field mode, which cannot adapt to the needs of impurity treatment with different adhesion characteristics. Large-area light dust requires high flow rate coverage cleaning, while stubborn agglomerated impurities require high-pressure impact peeling. Traditional equipment lacks a dynamic adjustment mechanism. High-pressure direct flow is prone to energy waste in shallow cavity areas and is prone to rebound contamination, while diffusion flow cannot provide sufficient shear force. This functional contradiction leads to low cleaning efficiency and makes it difficult to meet the stringent requirements of high-end injection molding production for mold cavity cleanliness.

[0004] Mechanical scraping cleaning carries the risk of damaging the mold surface, while impurities removed by pneumatic cleaning are easily suspended in the cavity and re-adhere, causing cross-contamination. Existing technologies lack the ability to guide and remove detached impurities, and cannot automatically switch cleaning strategies according to the characteristics of the mold cavity structure. This passive cleaning method has a low level of intelligence, cannot perform preventive maintenance, and is difficult to achieve closed-loop control of the cleaning process. It has become a key bottleneck restricting the efficiency improvement of injection molding automated production lines. In view of this, we propose a mold cavity self-cleaning mechanism and its injection molding machine. Summary of the Invention

[0005] The purpose of this invention is to provide a mold cavity self-cleaning mechanism and its injection molding machine to solve the technical problem of difficult cleaning of deep cavity dead corners and stubborn impurities in molds.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a mold cavity self-cleaning mechanism and its injection molding machine, comprising a moving module with an inner cavity, a stationary module with an ejector pin structure, a cleaning mechanism and a control component arranged inside the moving module, wherein the cleaning mechanism includes an adjustment plate slidably disposed inside the moving module, and a plurality of cleaning holes are provided on one side of the adjustment plate, the cleaning holes being coaxial laterally with the mold cavity on the moving module, and each cleaning hole having a deep cavity arranged inside;

[0007] Each of the cleaning holes is fitted with a movable ring and an inner ring. The movable ring and the inner ring are rotatably connected by a hollow rod, and the hollow rod is fixedly connected to the outer fan blades. Each of the hollow rods is fitted with an inner fan blade.

[0008] When the movable ring slides into the deep cavity, the outer fan blade and the inner fan blade are fixed by the control component, while the inner fan blade and the inner ring move relative to each other. The outer fan blade and the inner fan blade tilt and rotate to generate a spiral flow, which, together with the axial jet of the transmission cylinder, cleans the dead corners of the cylindrical mold cavity and areas with insufficient axial impact force.

[0009] When the movable ring slides out of the deep cavity, the inner fan blade is fixed to the inner ring, while the outer fan blade moves relative to the inner fan blade. The outer fan blade rotates to narrow the flow channel, forming a high-pressure annular jet. Combined with the negative pressure entrainment effect of the axial jet convergence, large impurities are removed. This invention uses a sliding trigger control component of the movable ring inside and outside the deep cavity to intelligently switch the connection state of the outer and inner fan blades, achieving automatic adaptation of the cleaning mode. When the movable ring slides into the deep cavity, the outer and inner fan blades are fixed and tilted to rotate, generating a strong penetrating spiral flow. Combined with the axial jet of the transmission cylinder, this effectively solves the problems of difficult cleaning of dead corners in the deep cavity and insufficient axial impact force. When the movable ring slides out of the deep cavity, the outer fan blade rotates independently to narrow the flow channel, forming a high-pressure annular jet. Through the negative pressure entrainment effect generated by the convergence with the axial jet, large impurities are thoroughly removed and secondary adhesion is prevented. Ultimately, efficient, precise, and non-damaging full-coverage cleaning of the cylindrical mold cavity is achieved.

[0010] Preferably, the cleaning mechanism further includes a plurality of guide rods, which are fixedly connected to the inner walls on both sides of the cleaning hole in a circular array. Each guide rod has two balloons arranged on its surface, and the movable ring is slidably adapted to the surface of the guide rod by an electric slider.

[0011] Preferably, the inner ring is fitted inside the movable ring, and each inner ring surface has a plurality of insertion holes arranged in a ring array.

[0012] Preferably, the end of the hollow rod passes through the inner ring, and the end of the hollow rod is provided with several through slots in a circular array, and the through slots are connected to the interior of the hollow rod.

[0013] Preferably, the inner fan blade has a spherical cavity at its end, and a support frame is slidably fitted on the surface of several guide rods. Each support frame is rotatably connected to a transmission cylinder with a spiral channel on one side, and the end of the hollow rod rolls in contact with the inner wall of the spiral channel on the transmission cylinder.

[0014] Preferably, the control component includes a plurality of push rods, each of which is slidably sleeved inside the hollow rod and passes through a movable ring. Each push rod end is fixedly connected to a contact block, which is in movable contact with the inner wall of the cleaning hole. Each push rod end surface is sleeved with a first spring, and the end of the first spring is fixedly connected to the hollow rod.

[0015] Preferably, a limiting ring is fixedly connected to the other end of each of the top rods, a first locking rod is fixedly connected to one side of each of the limiting rings in a circular array, a rotating ring is rotatably sleeved on the side surface of each of the limiting rings, and a second locking rod is fixedly connected to the side of each rotating ring away from the first locking rod in a circular array, and the second locking rod passes through the spherical cavity and is inserted into the socket for adaptation.

[0016] Preferably, the spherical cavity has a fixed rod fixedly connected in a ring array inside, and a rotating ring is sleeved on the surface of the fixed rod. The inner wall of the spherical cavity has a number of slots in a ring array, and the first locking rod is inserted into and adapted to the slot.

[0017] Preferably, the moving module has several rigid pipes arranged inside, and the output ends of the rigid pipes are all connected to atomizing nozzles, which are arranged inside the cleaning hole. The moving module also has a diversion box arranged inside, which is connected to the cleaning hole.

[0018] An injection molding machine includes a machine tool, a machine cover with a sliding door arranged on top of the machine tool, a hydraulic transmission system arranged inside the machine cover, a plurality of tie rods arranged in a square array and fixed on one side inner wall of the machine cover, and an injection molding system arranged on top of the machine tool. The machine tool is characterized in that it further includes the aforementioned mold cavity self-cleaning mechanism, wherein the moving module is arranged at the output end of the hydraulic transmission system and the stationary module is arranged on top of the machine tool.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention uses a sliding trigger control component with a movable ring inside and outside the deep cavity to intelligently switch the connection state of the outer and inner fan blades, achieving automatic adaptation of the cleaning mode. When the movable ring slides into the deep cavity, the outer and inner fan blades are fixed and rotate at an angle, generating a highly penetrating spiral flow. Combined with the axial jet of the transmission cylinder, this effectively solves the problems of difficult cleaning of dead corners in the deep cavity and insufficient axial impact force. When the movable ring slides out of the deep cavity, the outer fan blades rotate independently, narrowing the flow channel to form a high-pressure annular jet. Through the negative pressure suction effect generated by the intersection with the axial jet, large impurities are thoroughly removed and secondary adhesion is prevented, ultimately achieving efficient, precise, and non-damaging full-coverage cleaning of the cylindrical mold cavity.

[0021] 2. This invention achieves two fixed combination modes—outer and inner fan blades, and inner fan blades and inner ring—through the sliding of the movable ring inside and outside the deep cavity, in conjunction with the control component. These correspond to two cleaning functions: a spiral flow and an axial jet are formed inside the deep cavity, specifically addressing the problems of dead corners in the cylindrical mold cavity and insufficient impact force on axial dirt; a high-pressure annular jet and a negative pressure suction effect are formed outside the deep cavity, efficiently removing large impurities and preventing secondary adhesion of detached impurities. It can adapt to different pollution scenarios without replacing cleaning components.

[0022] 3. In this invention, the cleaning hole and the cylindrical mold cavity are designed to be horizontally coaxial. Combined with the spiral channel of the transmission cylinder to guide the fan blades to rotate at an angle, the airflow is ensured to act precisely on the inner wall of the mold cavity. The combination of the atomizing nozzle and the diverter box can achieve gas-liquid synergistic cleaning at the same time, improving the impurity removal effect. The combination of the balloon and the guide rod can quickly fix the support frame and the transmission cylinder, ensuring the stability of the mechanism during the cleaning process. It is adapted to the structural characteristics of the circular cylindrical mold cavity, ensuring that no part of the cleaning is missed. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the injection molding machine of the present invention.

[0024] Figure 2 This is a schematic diagram of the internal structure of the moving module of the present invention.

[0025] Figure 3 This is a cross-sectional structural diagram of the cleaning mechanism of the present invention.

[0026] Figure 4 This is a partial cross-sectional structural diagram of the cleaning mechanism of the present invention.

[0027] Figure 5 This is a schematic diagram of the static module structure of the present invention. Figure 1 .

[0028] Figure 6 This is a schematic diagram of the internal structure of the cleaning hole in the present invention. Figure 1 .

[0029] Figure 7 This is a schematic diagram of the internal structure of the cleaning hole in the present invention. Figure 2 .

[0030] Figure 8 This is a three-dimensional partial structural diagram of the cleaning mechanism of the present invention.

[0031] Figure 9 This is a schematic cross-sectional view of the three-dimensional structure of the inner fan blade of the present invention, to illustrate the three-dimensional structure of the spherical cavity.

[0032] Figure 10 For the present invention Figure 9 A magnified structural diagram at point A in the diagram.

[0033] Figure 11 This is a three-dimensional exploded view of the control component of the present invention.

[0034] Figure 12 This is a schematic cross-sectional view of the inner ring three-dimensional structure of the present invention.

[0035] Figure 13 This is a schematic diagram of the concentrated high-pressure annular jet in use according to the present invention.

[0036] Figure 14This is a schematic diagram of the usage state structure of the centrally reinforced spiral composite flow of the present invention.

[0037] The following are the labeling instructions in the diagram: 1. Machine tool; 11. Machine cover; 12. Hydraulic transmission system; 13. Guiding column; 14. Injection molding system; 2. Moving module; 3. Stationary module; 4. Cleaning mechanism; 41. Adjusting plate; 42. Cleaning hole; 421. Deep cavity; 422. Guide rod; 423. Balloon; 43. Moving ring; 44. Inner ring; 441. Insertion hole; 45. Outer fan blade; 46. Hollowed-out rod; 461. Through groove; 47. Inner fan blade; 471. Spherical cavity; 48. Support frame; 49. Transmission cylinder; 5. Control component; 51. Top rod; 511. Contact block; 52. First spring; 53. Limiting ring; 531. First locking rod; 54. Rotating ring; 541. Second locking rod; 55. Fixing rod; 56. Slot; 61. Rigid pipe; 62. Atomizing nozzle; 63. Diverter box. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figures 1-14 As shown, this embodiment provides an injection molding machine, including a machine tool 1, a machine cover 11 with a sliding door arranged on the top of the machine tool 1, a hydraulic transmission system 12 arranged inside the machine cover 11, a plurality of tie rods 13 fixedly connected in a square array on one side inner wall of the machine cover 11, an injection molding system 14 arranged on the top of the machine tool 1, and a mold cavity self-cleaning mechanism.

[0040] It is worth noting that the injection molding machine described in this embodiment is a conventional technology. The hydraulic transmission system 12 is composed of components such as hydraulic rods and multi-link transmission components; the injection molding system 14 is composed of components such as a hopper, heating elements and injection conveying components, and is used to convey the injection molding solution.

[0041] The self-cleaning mechanism of the mold cavity includes a moving module 2 with an inner cavity, a stationary module 3 with an ejector pin structure, a cleaning mechanism 4 arranged inside the moving module 2, and a control component 5. The moving module 2 is arranged at the output end of the hydraulic transmission system 12, and the stationary module 3 is arranged on the top of the machine tool 1.

[0042] It is worth noting that the upper cavity of the moving module 2 is cylindrical, and the stationary module 3 is equipped with ejector pins to eject the injection molded product.

[0043] The cleaning mechanism 4 includes an adjusting plate 41 with a pneumatic slider. The adjusting plate 41 is sealed and slidably fitted inside the vertical groove on the moving module 2. Several cleaning holes 42 are opened on one side of the adjusting plate 41, and the cleaning holes 42 are coaxial with the mold cavity on the moving module 2 laterally. Each cleaning hole 42 has a deep cavity 421 arranged inside (the diameter of the deep cavity 421 is larger than the inner diameter of the cleaning hole 42). Several guide rods 422 are fixedly connected in a ring array on both sides of the inner wall of each cleaning hole 42. Two balloons 423 that can expand or contract are arranged on the surface of each guide rod 422 (the balloons 423 are existing conventional technology; when expanded, the diameter of the balloons 423 is larger than the surface diameter of the guide rods 422; when contracted, the diameter of the balloons 423 is smaller than the surface diameter of the guide rods 422). A movable ring 43 is slidably fitted inside each cleaning hole 42, and the movable ring 43 is slidably fitted to the guide rod by an electric slider. On surface 422, each movable ring 43 is fitted with an inner ring 44. Each inner ring 44 has several insertion holes 441 arranged in a ring array on its surface. The movable ring 43 and the inner ring 44 are rotatably connected to several outer fan blades 45 through a hollow rod 46 in a ring array. The end of the hollow rod 46 passes through the inner ring 44 and is fitted inside the outer fan blades 45. The end of the hollow rod 46 has several through slots 461 arranged in a ring array and communicates with the inside of the hollow rod 46. Each hollow rod 46 has an inner fan blade 47 fitted on its surface, and the outer fan blades 45 are in close contact with the inner fan blades 47. The end of the inner fan blades 47 is provided with a spherical cavity 471. Several guide rods 422 are slidably fitted with support frames 48 on their surfaces. Each support frame 48 is rotatably connected to a transmission cylinder 49 with a spiral channel on one side, and the end of the hollow rod 46 rolls in contact with the inside of the spiral channel on the transmission cylinder 49.

[0044] It is worth noting that during injection molding, the adjusting plate 41 moves upward, and the cleaning hole 42 on the adjusting plate 41 is misaligned with the mold cavity on the moving module 2. When the moving module 2 and the stationary module 3 are closed, the mold cavity on the moving module 2 can be in a closed state for injection molding of products. During cleaning, the adjusting plate 41 moves downward, and the cleaning hole 42 is connected to the mold cavity on the moving module 2 for cleaning the mold cavity on the moving module 2.

[0045] It is worth noting that the movement of the movable ring 43 causes the hollow rod 46 to roll in the spiral channel on the transmission cylinder 49. The end of the hollow rod 46 can be forced to roll along the trajectory of the inner wall of the spiral. At the same time, the airflow can flow in a spiral or diffused manner through the spiral channel on the transmission cylinder 49.

[0046] This invention utilizes the sliding of the movable ring 43 within and outside the deep cavity 421, in conjunction with the control component 5, to achieve two fixed combination modes: the outer fan blade 45 and the inner fan blade 47, and the inner fan blade 47 and the inner ring 44. These correspond to two cleaning functions: a spiral flow and an axial jet are formed within the deep cavity 421, specifically addressing the issues of dead corners in the cylindrical mold cavity and insufficient axial dirt impact force; a high-pressure annular jet and a negative pressure suction effect are formed outside the deep cavity 421, efficiently removing large impurities and preventing secondary adhesion of detached impurities. This allows it to adapt to different pollution scenarios without the need to replace cleaning components.

[0047] In this invention, the cleaning hole 42 is designed to be horizontally coaxial with the cylindrical mold cavity, and the spiral channel of the transmission cylinder 49 guides the fan blades to tilt and rotate, ensuring that the airflow is precisely applied to the inner wall of the mold cavity; the combination of the atomizing nozzle 62 and the diverter box 63 can simultaneously achieve gas-liquid synergistic cleaning, improving the impurity removal effect; the combination of the balloon 423 and the guide rod 422 can quickly fix the support frame 48 and the transmission cylinder 49, ensuring the stability of the mechanism during the cleaning process, adapting to the structural characteristics of the circular cylindrical mold cavity, and ensuring that no part of the cleaning is missed.

[0048] like Figure 2 and Figures 10-11 As shown, the control component 5 includes several push rods 51, each of which is slidably sleeved inside the hollow rod 46 and passes through the movable ring 43. Each push rod 51 has a contact block 511 fixedly connected to its end, and the contact block 511 is in movable contact with the inner wall of the cleaning hole 42 (the contact block 511 is in movable contact with the inner wall of the cleaning hole 42 and the inner wall of the deep cavity 421, allowing the push rod 51 to slide inside the hollow rod 46). A first spring 52 is sleeved on the surface of the end of each push rod 51, and the end of the first spring 52 is fixedly connected to the hollow rod 46. A limit switch is fixedly connected to the other end of each push rod 51. Each limiting ring 53 has a first locking rod 531 fixedly connected to one side in a ring array. Each limiting ring 53 has a rotating ring 54 rotatably sleeved on its side surface. Each rotating ring 54 has a second locking rod 541 fixedly connected to the side away from the first locking rod 531 in a ring array. The second locking rod 541 passes through the spherical cavity 471 and is inserted into the insertion hole 441. The spherical cavity 471 has a fixed rod 55 fixedly connected to it in a ring array inside. The rotating ring 54 is sleeved on the surface of the fixed rod 55. The inner wall of the spherical cavity 471 has several slots 56 in a ring array. The first locking rod 531 is inserted into the slot 56.

[0049] Specifically, the movable ring 43 slides inside the cleaning hole 42 via an electric slider, driving the transmission cylinder 49 to move, causing the support frame 48 to abut against and fix the inflated balloon 423 located within the deep cavity 421. When the contact block 511 slides inside the deep cavity 421, the first spring 52 applies a force to the contact block 511, causing it to make active contact with the inner wall of the deep cavity 421. The push rod 51 moves inside the hollow rod 46, driving the limiting ring 53 to move, causing the first locking rod 531 to be inserted into the slot 56, and the second locking rod 541 to be pulled out from the insertion hole 441. This causes the outer fan blade 45 and the inner fan blade 47 to be fixedly connected. Then, the movable ring 43 moves again, and the end of the hollow rod 46 rolls in the spiral channel on the transmission cylinder 49. The rotation of the hollow rod 46 drives the outer fan blade 45 to rotate, and the outer fan blade 45 drives the inner fan blade 47 to rotate, causing the outer fan blade 45 and the inner fan blade 47 to tilt axially. The airflow generates a spiral flow, and the airflow flows through the inside of the transmission cylinder 49 and its spiral channel, applying an axial jet to the center of the spiral flow, so that the external airflow flows in a spiral shape, thus solving the problems of traditional cleaning methods. Problems include difficulty in cleaning dead corners, insufficient axial impact force for stains, and easy secondary settling of pollutants; the movable ring 43 slides inside the cleaning hole 42 via an electric slider, driving the transmission cylinder 49 to move, so that the support frame 48 abuts against and is fixed within the range of the expanded spherical balloon 423 located within the inner wall of the cleaning hole 42 (diameter smaller than the depth cavity 421). The contact block 511 is subjected to pressure, and the push rod 51 pushes the rotating ring 54 to move towards the inner ring 44, so that the second locking rod 541 passes through the spherical cavity 471 and is inserted into the insertion hole 441, thus fixing the inner fan blade 47 to the inner ring 44. The inner fan blade 47 and the outer fan blade 45 are movably adapted to each other, the movable ring 43 moves again, and the end of the hollow rod 46 rolls in the spiral channel on the transmission cylinder 49. The rotation of the hollow rod 46 drives the outer fan blade 45 to rotate, causing it to rotate axially and reducing the airflow space. For the circular cylindrical mold cavity, by reducing the airflow space, a high-pressure annular jet is formed to impact and peel off impurities. Combined with the negative pressure entrainment effect generated by the intersection of the axial jet and the annular jet, the technical problems of the attenuation of the impact force of impurities at the bottom of the cavity, the secondary adhesion of detached impurities, and the difficulty in completely removing large impurities have been solved.

[0050] like Figure 4 As shown, the moving module 2 has several rigid pipes 61 arranged inside, and the output ends of the rigid pipes 61 are all connected to atomizing nozzles 62. The atomizing nozzles 62 are arranged inside the cleaning hole 42. The moving module 2 has a diversion box 63 arranged inside, and the diversion box 63 is connected to the cleaning hole 42.

[0051] Working principle: During injection molding, the external control system first activates the hydraulic transmission system 12, which drives the moving module 2 to move and close with the stationary module 3. The pneumatic slider causes the adjusting plate 41 to slide upward, causing the cleaning hole 42 to be misaligned with the mold cavity on the moving module 2, thus closing the mold cavity. After mold closing, the injection molding system 14 melts the injection granules into liquid and delivers them into the mold cavity. The cooling system then forms the mold cavity. Finally, the hydraulic transmission system 12 separates the moving module 2 and the stationary module 3.

[0052] When cleaning the dead corners and areas with insufficient axial impact force in the cylindrical mold cavity, the control system causes the electric slider to drive the movable ring 43 to slide inside the cleaning hole 42 to the deep cavity 421. The support frame 48 slides on the surface of the guide rod 422. Through the expansion of the balloon 423, the support frame 48 abuts against the surface of the balloon 423, fixing it and the transmission cylinder 49 inside the cleaning hole 42. When the contact block 511 moves to the deep cavity 421, the first spring 52 applies a force to the contact block 511, causing it to move and make contact with the inner wall of the deep cavity 421. The push rod 51 moves inside the hollow rod 46, driving the limiting ring 53 to move. This causes the first locking rod 531 to be inserted into the slot 56, and the second locking rod 541 to be pulled out from the insertion hole 441. The outer fan blade 45 and the inner fan blade 47 are fixedly connected. The movable ring 43 moves again, and the end of the hollow rod 46 rolls in the spiral channel on the transmission cylinder 49. The rotation of the hollow rod 46 drives the outer fan blade 45 to rotate. Since the outer fan blade 45 and the inner fan blade 47 are fixed, the outer fan blade 45 and the inner fan blade 47 rotate axially at the same time and tilt, forming a guide channel. The airflow generates a spiral flow, and the airflow flows through the inside of the transmission cylinder 49, applying an axial jet to the center of the spiral flow to clean the mold cavity.

[0053] When removing large impurities, the control system first causes the electric slider to drive the movable ring 43 to slide out of the deep cavity 421 inside the cleaning hole 42. The expansion of the balloon 423 causes the support frame 48 to abut against the surface of the balloon 423, fixing it and the transmission cylinder 49 inside the cleaning hole 42. The contact block 511 is under pressure, and the push rod 51 pushes the rotating ring 54 towards the inner ring 44. The second locking rod 541 passes through the spherical cavity 471 and inserts into the insertion hole 441, causing the inner fan blade 47 and the inner ring 44 to... With a fixed connection, the inner fan blade 47 and the outer fan blade 45 are movably adapted, the movable ring 43 moves again, and the end of the hollow rod 46 rolls in the spiral channel on the transmission cylinder 49. The rotation of the hollow rod 46 drives the outer fan blade 45 to rotate, causing it to rotate axially. The airflow space is reduced. When dealing with large impurities in the cylindrical mold cavity, the high-pressure annular jet is formed by reducing the airflow space to impact and peel off the impurities. Combined with the negative pressure entrainment effect generated by the intersection of the axial jet and the annular jet, the large impurities are completely removed.

[0054] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A mold cavity self-cleaning mechanism, comprising a moving mold block (2) with an inner cavity, a stationary mold block (3) with a pin structure, a cleaning mechanism (4) arranged inside the moving mold block (2), and a regulating assembly (5), characterized in that, The cleaning mechanism (4) comprises an adjusting plate (41) slidingly arranged in the movable module (2), one side of the adjusting plate (41) is provided with a plurality of cleaning holes (42), the cleaning holes (42) are transversely coaxial with the mold cavities on the movable module (2), and a deep cavity (421) is arranged in each cleaning hole (42); Each cleaning hole (42) is sleeved with a movable ring (43) and an inner ring (44), a plurality of outer vanes (45) are rotatably connected between the movable ring (43) and the inner ring (44) through the hollow rod (46), and the hollow rod (46) is fixedly connected with the outer vanes (45); an inner vane (47) is sleeved on the surface of each hollow rod (46). When the movable ring (43) slides into the deep cavity (421), the outer vanes (45) and the inner vanes (47) are fixed by the regulating assembly (5), and the inner vanes (47) are relatively movable with the inner ring (44); the outer vanes (45) and the inner vanes (47) are inclined to rotate to generate a spiral flow, and the spiral flow is matched with the axial jet flow of the transmission cylinder (49) to clean the dead angle of the cylindrical mold cavity and the area where the axial impact force is insufficient; When the movable ring (43) slides out of the deep cavity (421), the inner vanes (47) are fixed with the inner ring (44), and the outer vanes (45) and the inner vanes (47) are relatively movable; the outer vanes (45) are rotated to reduce the flow passage to form a high-pressure annular jet flow, combined with the negative pressure suction effect of the intersection of the axial jet flow, to remove large impurities.

2. A mold cavity self-cleaning mechanism according to claim 1, wherein The cleaning mechanism (4) further comprises a plurality of guide rods (422), a plurality of guide rods (422) are fixedly connected to the inner walls on both sides of the cleaning hole (42) in a ring array, two balloon (423) are arranged on the surface of each guide rod (422), and the movable ring (43) is slidingly fitted on the surface of the guide rod (422) by the electric sliding block.

3. A mold cavity self-cleaning mechanism according to claim 2, wherein The inner ring (44) is sleeved in the movable ring (43), and a plurality of insertion holes (441) are arranged in a ring array on the surface of each inner ring (44).

4. A mold cavity self-cleaning mechanism according to claim 3, wherein The end of the hollow rod (46) penetrates through the inner ring (44), a plurality of through grooves (461) are arranged in a ring array on the end of the hollow rod (46), and the through grooves (461) are communicated with the inside of the hollow rod (46).

5. A mold cavity self-cleaning mechanism according to claim 4, wherein The end of the inner vane (47) is provided with a spherical cavity (471), a plurality of guide rods (422) are slidingly fitted with a support frame (48) on the surface, each support frame (48) is rotatably connected with a transmission cylinder (49) having a spiral channel on one side, and the end of the hollow rod (46) is rolling contact with the inner wall of the spiral channel on the transmission cylinder (49).

6. A mold cavity self-cleaning mechanism according to claim 5, wherein, The regulating assembly (5) comprises a plurality of top rods (51), each of the top rods (51) is slidingly sleeved in the hollow rod (46), and the top rod (51) penetrates through the movable ring (43); each top rod (51) is fixedly connected with a contact block (511) at the end, and the contact block (511) is in movable contact with the inner wall of the cleaning hole (42); a first spring (52) is sleeved on the surface of the end of each top rod (51), and the end of the first spring (52) is fixedly connected with the hollow rod (46).

7. A mold cavity self-cleaning mechanism according to claim 6, wherein Another end of each of the top rods (51) is fixedly connected with a limiting ring (53), one side of each of the limiting rings (53) is fixedly connected with a first locking rod (531) in an annular array, a side surface of each of the limiting rings (53) is rotatably sleeved with a rotating ring (54), and one side of each of the rotating rings (54) away from the first locking rod (531) is fixedly connected with a second locking rod (541) in an annular array, and the second locking rod (541) is insertedly connected with the socket (441) through the spherical cavity (471).

8. A mold cavity self-cleaning mechanism according to claim 7, wherein The spherical cavity (471) is fixedly connected with a fixed rod (55) in an annular array inside, and the rotating ring (54) is sleeved on the surface of the fixed rod (55), and the inner wall of the spherical cavity (471) is provided with a plurality of insertion grooves (56) in an annular array, and the first locking rod (531) is insertedly connected in the insertion grooves (56).

9. A mold cavity self-cleaning mechanism according to claim 8, wherein, The movable module (2) is internally arranged with a plurality of hard pipes (61), the output ends of the plurality of hard pipes (61) are all communicated with atomizing nozzles (62), and the atomizing nozzles (62) are arranged in the cleaning hole (42), and the movable module (2) is internally arranged with a shunt box (63), and the shunt box (63) is communicated with the cleaning hole (42).

10. An injection molding machine comprising a machine bed (1), a hood (11) with a sliding door arranged on top of the machine bed (1), a hydraulic drive system (12) arranged inside the hood (11), a number of corinthian columns (13) fixed in a square array in the inner wall of one side of the hood (11), and an injection molding system (14) arranged on top of the machine bed (1), characterized in that, Also comprising the mold cavity self-cleaning mechanism of any one of claims 1-9, the movable module (2) is arranged at the output end of the hydraulic transmission system (12), and the static module (3) is arranged at the top of the machine tool (1).

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