Rubber part production liquid nitrogen refrigeration trimming machine

Abstract

The application discloses a kind of liquid nitrogen refrigeration trimming machines for rubber production, it is related to refrigeration trimming machine technical field, including refrigeration trimming machine cabinet, the top surface of one side of refrigeration trimming machine cabinet is hinged rotation installation with cabinet door, the surface of one side of refrigeration trimming machine cabinet is provided with control panel;Through the setting of reciprocating swing bar, continuously rotating wedge-shaped scraper and reciprocating telescopic sleeve, so that rubber part is in the state of continuous movement during cooling process and trimming process, avoid rubber part to be accumulated together in the refrigeration trimming processing basket of inclined arrangement, continuous movement can prevent rubber part due to gravity, ensure that each component is evenly exposed to liquid nitrogen environment, the contact frequency of rubber part surface and liquid nitrogen is improved under dynamic state, to shorten overall cooling time, avoid that rubber part is not thoroughly cooled, simultaneously, during trimming operation, rubber part in motion is not easy to form fixed stacking structure, there is no sheltered corner when high-speed projectile impacts.

Description

Technical Field

[0001] This invention relates to the field of cryogenic trimming machine technology, specifically a liquid nitrogen cryogenic trimming machine for rubber parts production. Background Technology

[0002] Cryogenic trimming, also known as cryoblasting or cryogenic deburring, is a semi-finished product processing technology that utilizes the difference in embrittlement at low temperatures to remove burrs from rubber, injection molded, and die-cast parts. The principle is that polymer materials such as rubber, plastics, and alloys are in different phases at different temperatures. Their physical properties change from hardening to embrittlement to crystallization as the temperature decreases, and the degree of embrittlement varies depending on the thickness. The trimming is completed by utilizing the embrittlement gradient caused by the thickness difference between the burr and the body.

[0003] Existing cryogenic trimming machines place rubber parts in an inclined basket. While the basket rotates due to a motor, high-speed particles collide with the rubber parts at low temperatures, causing the rubber parts to move randomly within the basket. By utilizing the difference in brittleness between the rubber parts and their edges at low temperatures, the trimming process of the rubber products is completed.

[0004] In existing technologies, the tilted parts basket causes rubber parts to accumulate in the tilted direction of the basket under gravity. This accumulation of parts hinders the uniform penetration of liquid nitrogen cooling gas.

[0005] Furthermore, an existing invention patent with publication number CN114311448A discloses a cryogenic trimming machine. This machine utilizes a method where "the working ring rotates with the parts basket; a sliding component is provided inside the housing to control the working ring's movement along the axis of the parts basket; during the process of the parts basket changing from a loading / unloading state to a freezing state, the working ring slides away from the parts basket; when the parts basket is in a freezing state, the working ring is aligned with the ejector wheel and liquid nitrogen delivery pipe; during the process of the parts basket changing from a freezing state to a loading / unloading state, the working ring slides closer to the parts basket; several vibrating blocks are also provided on the working ring; a material leveling component is provided inside the housing to control the vibration of the vibrating blocks; and a pushing component is also provided inside the parts basket to slide along the axis of the parts basket." This method achieves the goal of "performing material leveling of the workpiece with the assistance of the material leveling component, thereby improving the trimming efficiency of the cryogenic trimming machine."

[0006] In practice, the bottom of the parts basket after trimming will store projectiles, which makes it difficult to discharge the projectiles directly and is not conducive to subsequent continuous operation.

[0007] To address this issue, we propose a liquid nitrogen cryogenic trimming machine for rubber parts production. Summary of the Invention

[0008] Technical problems to be solved

[0009] In view of this, and in view of the shortcomings of the prior art, the present invention provides a liquid nitrogen cryogenic trimming machine for rubber parts production, so as to solve the problems mentioned in the background art.

[0010] Technical solution

[0011] To achieve the above objectives, the present invention provides the following technical solution: a liquid nitrogen cryogenic trimming machine for rubber parts production, comprising a cryogenic trimming machine cabinet, a cabinet door mounted on the top surface of one side of the cryogenic trimming machine cabinet via a hinge, a control panel provided on one side surface of the cryogenic trimming machine cabinet, a liquid nitrogen delivery pipe fixedly connected to one side of the top of the cryogenic trimming machine cabinet, a drive motor detachably and fixedly installed inside one side of the cryogenic trimming machine cabinet, and further comprising a cryogenic treatment component, a disturbance component, an auxiliary flipping component, and a drive component disposed inside the cryogenic trimming machine cabinet;

[0012] The freezing processing assembly includes a limiting frame fixedly mounted to the output shaft end of a drive motor via a drive rod. A freezing trimming basket is rotatably mounted on the top surface of the limiting frame. A wedge-shaped scraper is fixedly mounted in a circumferential array on the bottom surface of the inner wall of the limiting frame. A positioning ring is fixedly connected to the bottom surface of multiple wedge-shaped scrapers. A pressing rod is fixedly mounted on the side surface of multiple wedge-shaped scrapers away from the inner wall of the freezing trimming basket.

[0013] The disturbance component includes a limiting ring rotatably mounted on the surface of multiple wedge-shaped scrapers that is close to each other. The surface of the limiting ring away from the wedge-shaped scrapers has through slots arranged in a circumferential array. The surface of the through slots away from the wedge-shaped scrapers has positioning rails fixedly mounted in a circumferential array.

[0014] The auxiliary tilting component works in conjunction with the freezing treatment component and the disturbance component to disturb the rubber parts inside the freezing trimming basket, preventing the rubber parts from piling up when the freezing trimming basket is tilted, which would affect the penetration of liquid nitrogen gas.

[0015] The auxiliary flipping component includes a positioning sleeve located at the center of the bottom of the frozen trimming basket. A telescopic sleeve is slidably installed inside the positioning sleeve. Connecting rods are fixedly installed in a circumferential array on the outer surface of the top of the telescopic sleeve. A traction ring is rotatably installed inside the end of the connecting rod away from the telescopic sleeve.

[0016] Preferably, the center of the limiting frame on the side away from the output shaft end of the drive motor is rotatably mounted on the inner wall of the freeze trimming machine cabinet via a metal rod. The wedge-shaped scraper is set to fit against the inner wall of the freeze trimming basket, and the side of the wedge-shaped scraper away from the freeze trimming basket is composed of two inclined surfaces with different inclinations connected together.

[0017] Preferably, the disturbance component further includes a circular connecting rod fixedly installed in the middle of multiple positioning track components. The surface of the circular connecting rod is arranged in a circumferential array with a swing arm for damping rotation. A connecting member is fixedly installed between the surfaces of two adjacent swing arms.

[0018] Preferably, each positioning track component is located between two adjacent through slots, the number of multiple swing rods is adapted to the number of through slots, and every two swing rods are located between two adjacent positioning track components. The distance between two swing rods located within two adjacent positioning track components is greater than the distance between the swing rod and the positioning track component.

[0019] Preferably, the drive assembly includes a stepper motor fixedly installed inside the limiting frame, a drive gear fixedly installed on the top output shaft end of the stepper motor, a turntable fixedly connected to the top surface of the drive gear, planetary gears meshing symmetrically on both sides of the drive gear, a driven gear ring meshing on the tooth surface of the two planetary gears away from the turntable, and a limit disk fixedly installed on the top surface of the limiting frame.

[0020] Preferably, the limiting disc is disposed inside the frozen trimming basket and fits against the bottom surface of the frozen trimming basket. The drive gear, planetary gear and driven gear ring are rotatably mounted on the top surface of the limiting disc, and the outer arc surface of the driven gear ring is fixedly mounted to the bottom inner wall of the frozen trimming basket.

[0021] Preferably, the outer inclined surface of the turntable fits into the inner surface of the driven toothed ring, sealing the bottom of the freeze trimming basket. The telescopic sleeve, the positioning sleeve, and the turntable are arranged coaxially from top to bottom, and the bottom surface of the positioning sleeve is fixedly installed on the upper surface of the turntable.

[0022] Preferably, the traction ring is rotatably mounted on the bottom surface of the swing arm.

[0023] Preferably, the extrusion rods are all located below the limiting ring, and the extrusion rods are located on the movement trajectory at the top of the positioning track component.

[0024] Preferably, the surfaces of the positioning track and the swing arm on the side away from the frozen trimming basket are both designed as polygonal shapes, and the surface curve of the polygonal surface is composed of a section of inclined curve, a section of horizontal curve, a section of short inclined curve and a section of long horizontal curve.

[0025] Compared with the prior art, the present invention provides a liquid nitrogen cryogenic trimming machine for rubber parts production, which has the following beneficial effects:

[0026] By using a reciprocating swing arm, a continuously rotating wedge-shaped scraper, and a reciprocating telescopic sleeve, the rubber parts are kept in continuous motion during the cooling and trimming processes. This prevents the rubber parts from piling up in the inclined freezing trimming basket. Continuous motion prevents the rubber parts from being damaged by gravity, ensuring that each component is evenly exposed to the liquid nitrogen environment. In a dynamic state, the contact frequency between the rubber part surface and the liquid nitrogen increases, thereby shortening the overall cooling time and preventing incomplete cooling of the rubber parts. At the same time, during the trimming operation, the moving rubber parts are less likely to form a fixed stacking structure, and there are no blind spots when subjected to high-speed projectile impact.

[0027] The opposing movements of the swing arm and the wedge-shaped scraper cause the rubber parts to be continuously subjected to two opposing forces during the processing, generating a compound motion mode similar to "kneading". This dynamic interference can improve the uniformity of the distribution of the rubber parts in the centrifugal force field, making it easier to disperse the rubber parts. Moreover, when the rubber parts show a tendency to accumulate locally, the opposing force can instantly disintegrate the stable structure that is about to be formed.

[0028] The reciprocating lifting operation of the telescopic sleeve lifts the rubber parts piled up at the bottom of the frozen trimming basket in an inclined direction. The periodic lifting breaks the static friction between the rubber parts, causing the piled rubber parts to change from a stable state to a dynamic discrete state, thus reducing local density differences.

[0029] The wedge-shaped scraper, positioning track components, and inclined surface of the swing arm facilitate the sliding of the rubber components along the inclined surface when the cryogenic trimming basket is in an inclined state. This prevents the rubber components inside the inclined cryogenic trimming basket from being too unevenly distributed, which would affect the contact between the rubber components and liquid nitrogen.

[0030] The continuous contact between the extrusion rod and the swing rod in motion generates a reverse vibration force that is transmitted to the frozen trimming basket. During the trimming process, the frozen trimming basket in the vibrating state facilitates the discharge of impurities from the shot and rubber parts after processing, thus avoiding affecting the next use of the frozen trimming basket. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the cabinet door in the unfolded state of the present invention;

[0033] Figure 3 This is a schematic diagram showing the positional relationship of the drive motor in this invention;

[0034] Figure 4 This is a schematic diagram showing the positional relationship of the freeze trimming basket in this invention;

[0035] Figure 5This is a schematic diagram of the internal cross-sectional structure of the freeze trimming basket of the present invention;

[0036] Figure 6 This is a schematic diagram showing the positional relationship of the turntable in this invention;

[0037] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point A in the middle;

[0038] Figure 8 This is a schematic diagram of the internal cross-sectional structure of the frame defined by the present invention;

[0039] Figure 9 This is a schematic diagram of the connection relationship at the limiting ring of the present invention;

[0040] Figure 10 This is a schematic diagram showing the positional relationship of the extrusion rod in this invention.

[0041] In the diagram: 11. Refrigerated trimming machine cabinet; 12. Cabinet door; 13. Control panel; 14. Liquid nitrogen delivery pipeline; 15. Drive motor;

[0042] 21. Limiting frame; 22. Freezing trimming basket; 23. Wedge scraper; 24. Positioning ring; 25. Extrusion rod;

[0043] 31. Limiting ring; 32. Through groove; 33. Positioning track component; 34. Ring connecting rod; 35. Swing rod; 36. Connecting component;

[0044] 41. Positioning sleeve; 42. Telescopic sleeve; 43. Connecting rod; 44. Traction ring;

[0045] 51. Stepper motor; 52. Drive gear; 53. Turntable; 54. Planetary gear; 55. Driven gear ring; 56. Limiting disc. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0047] Embodiments of the present invention

[0048] Please see Figures 1 to 10A liquid nitrogen cryogenic trimming machine for rubber parts production includes a cryogenic trimming machine cabinet 11, a cabinet door 12 that is hinged to rotate on the top surface of one side of the cryogenic trimming machine cabinet 11, a control panel 13 that is provided on one side of the cryogenic trimming machine cabinet 11, a liquid nitrogen delivery pipe 14 that is fixedly connected to one side of the top of the cryogenic trimming machine cabinet 11, a drive motor 15 that is detachably fixedly installed inside one side of the cryogenic trimming machine cabinet 11, and also includes a cryogenic treatment component, a disturbance component, an auxiliary flipping component and a drive component disposed inside the cryogenic trimming machine cabinet 11;

[0049] The freezing processing assembly includes a limiting frame 21 fixedly mounted to the output shaft end of the drive motor 15 via a drive rod. A freezing trimming basket 22 is rotatably mounted on the top surface of the limiting frame 21. Wedge-shaped scrapers 23 are fixedly mounted in a circumferential array on the bottom surface of the inner wall of the limiting frame 21. A positioning ring 24 is fixedly connected to the bottom surface of multiple wedge-shaped scrapers 23. A pressing rod 25 is fixedly mounted on the side surface of multiple wedge-shaped scrapers 23 away from the inner wall of the freezing trimming basket 22.

[0050] The limiting frame 21 is rotatably mounted on the inner wall of the freeze trimming machine cabinet 11 via a metal rod at the center of the surface on the side away from the output shaft end of the drive motor 15. The wedge scraper 23 is set to fit against the inner wall of the freeze trimming basket 22, and the side of the wedge scraper 23 away from the freeze trimming basket 22 is composed of two inclined surfaces with different inclinations connected together.

[0051] The liquid nitrogen delivery pipeline 14 is equipped with a control valve that is controlled to open and close via a control panel 13. The liquid nitrogen delivery pipeline 14 is connected to the output end of an external liquid nitrogen storage device.

[0052] Further embodiments

[0053] Please see Figure 5 , Figure 9 and Figure 10 The liquid nitrogen freezing trimming machine for rubber parts production also includes a disturbance component. The disturbance component includes a limiting ring 31 that is rotatably installed on the surface of multiple wedge scrapers 23 that are close to each other. The surface of the limiting ring 31 away from the wedge scrapers 23 is provided with through grooves 32 in a circumferential array. The surface of the through grooves 32 away from the wedge scrapers 23 is fixedly installed with positioning track components 33 in a circumferential array.

[0054] The disturbance component also includes a circular connecting rod 34 fixedly installed in the middle of multiple positioning track components 33. The surface of the circular connecting rod 34 is arranged in a circumferential array with damped rotation and a swing rod 35 is mounted thereon. A connecting member 36 is fixedly installed between the surfaces of two adjacent swing rods 35.

[0055] Each positioning track component 33 is located between two adjacent through slots 32. The number of multiple swing rods 35 is matched with the number of through slots 32. Each pair of swing rods 35 is located between two adjacent positioning track components 33. The distance between two swing rods 35 located in two adjacent positioning track components 33 is greater than the distance between the swing rod 35 and the positioning track component 33.

[0056] The extrusion rods 25 are all located below the limiting ring 31, and the extrusion rods 25 are located on the movement trajectory of the top of the positioning track 33.

[0057] Among them, the surfaces of the positioning track 33 and the swing rod 35 on the side away from the frozen trimming basket 22 are both set as polygonal shapes. The surface curve of the polygonal curved surface is composed of a section of inclined curve, a section of horizontal curve, a section of short inclined curve and a section of long horizontal curve.

[0058] The inclined surfaces of the swing arm 35 and the positioning track 33 facilitate the sliding of the rubber parts along the surfaces of the swing arm 35 and the positioning track 33 when the cryogenic trimming basket 22 is in an inclined state, thus preventing the rubber parts from accumulating in large quantities at the bottom of the cryogenic trimming basket 22 and affecting the liquid nitrogen cooling and shot blasting trimming process.

[0059] During the movement, the extrusion rod 25 continuously contacts the surface of the swing rod 35. This continuous and rapid contact causes the extrusion rod 25 to vibrate, which is then transmitted to the cryogenic trimming basket 22, thereby assisting in the discharge of the shot and the processed rubber debris from the cryogenic trimming basket 22.

[0060] Further embodiments

[0061] Please see Figure 6 and Figure 9 The liquid nitrogen cryogenic trimming machine for rubber parts production also includes an auxiliary turning component. The auxiliary turning component works in conjunction with the cryogenic treatment component and the disturbance component to disturb the rubber parts being cryogenically treated inside the cryogenic trimming basket 22, so as to prevent the rubber parts from being piled up when the cryogenic trimming basket 22 is tilted, which would affect the penetration of liquid nitrogen gas.

[0062] The auxiliary flipping assembly includes a positioning sleeve 41 located at the center of the bottom of the frozen trimming basket 22. A telescopic sleeve 42 is slidably installed inside the positioning sleeve 41. A connecting rod 43 is fixedly installed in a circumferential array on the outer surface of the top of the telescopic sleeve 42. A traction ring 44 is rotatably installed inside the end of the connecting rod 43 away from the telescopic sleeve 42.

[0063] The traction ring 44 is rotatably mounted on the bottom surface of the swing arm 35.

[0064] The bottom end of the positioning track component 33 is fixedly installed on the top surface of the turntable 53.

[0065] Among them, see Figure 5 A protective cover is fitted to the inner wall of the bottom of the frozen trimming basket 22. The protective cover consists of an inner ring cover and an outer ring cover, which are rotatably installed relative to each other. The outer ring cover is fitted to the surface of the wedge-shaped scraper 23. Rotation mounting slots are equidistantly provided inside the inner ring cover. The bottom ends of the swing rods 35 are rotatably installed in the rotation mounting slots. The protective cover is used to protect the bottom of the frozen trimming basket 22 to prevent loose rubber parts after trimming from getting stuck in the space at the bottom of the swing rods 35, which would make it difficult to remove the rubber parts after the repair is completed.

[0066] Further embodiments

[0067] Please see Figures 6 to 8 The liquid nitrogen cryogenic trimming machine for rubber parts production also includes a drive assembly, which includes a stepper motor 51 fixedly installed inside the limiting frame 21. A drive gear 52 is fixedly installed on the top output shaft end of the stepper motor 51. The top surface of the drive gear 52 is coaxially fixedly connected to the turntable 53. Planetary gears 54 are centrally symmetrically meshed on both sides of the drive gear 52. The tooth surfaces of the two planetary gears 54 on the side away from the turntable 53 are jointly meshed with a driven gear ring 55. A limit disk 56 is fixedly installed on the top surface of the limiting frame 21.

[0068] The limiting disc 56 is disposed inside the frozen trimming basket 22 and fits against the bottom surface of the frozen trimming basket 22. The drive gear 52, planetary gear 54 and driven gear ring 55 are rotatably mounted on the top surface of the limiting disc 56. The outer arc surface of the driven gear ring 55 is fixedly mounted to the bottom inner wall of the frozen trimming basket 22.

[0069] The outer inclined surface of the turntable 53 fits against the inner surface of the driven toothed ring 55, sealing the bottom of the frozen trimming basket 22. The telescopic sleeve 42, the positioning sleeve 41, and the turntable 53 are arranged coaxially from top to bottom, and the bottom surface of the positioning sleeve 41 is fixedly installed on the upper surface of the turntable 53.

[0070] The top of the telescopic sleeve 42 is designed with an arc surface, which makes it easy for the rubber parts to slide along the curved surface and will not accumulate in the center of the frozen trimming basket 22.

[0071] The overall working process and principle of the above embodiments are as follows:

[0072] Placement of rubber parts to be trimmed:

[0073] The staff opens the cabinet door 12 and then controls the output shaft of the drive motor 15 to rotate via the control panel 13. The rotation direction is towards the direction close to the cabinet door 12. Subsequently, the limiting frame 21 fixedly installed at the end of the output shaft of the drive motor 15 will rotate accordingly, driving the frozen trimming basket 22 to rotate in the same direction. Then, the staff opens the cover at the top of the frozen trimming basket 22 and places the rubber parts to be frozen trimmed into the frozen trimming basket 22.

[0074] It should be noted that the starting and operation of the drive motor 15 by the control panel 13 in the above process are existing technologies, so they will not be described in detail here.

[0075] Subsequently, the staff put the lid on the frozen trimming basket 22 and drove the output shaft of the drive motor 15 to rotate in the opposite direction again through the control panel 13, driving the frozen trimming basket 22 in reverse and retracting it into the frozen trimming machine cabinet 11. Finally, the cabinet door 12 was closed.

[0076] It should be noted that during the above process, the frozen trimming basket 22 will be tilted under the action of the output shaft of the drive motor 15, with the tilt direction facing away from the cabinet door 12. Simultaneously, the freezer cabinet 11 is equipped with a nozzle for spraying projectiles to impact the frozen rubber parts, completing the trimming process. The tilt direction of the frozen trimming basket 22 is aligned with the spray direction of the nozzle. Figure 2 Meanwhile, the liquid nitrogen delivery pipeline 14 is connected to the output end of the external liquid nitrogen storage device, and the liquid nitrogen delivery pipeline 14 has a built-in control valve, which is controlled to open and close via the control panel 13. The above processes are all existing technologies, so they will not be described in detail here.

[0077] Cryogenic trimming of rubber parts:

[0078] After the staff closes the cabinet door 12, they then activate the control valve through the control panel 13 to deliver liquid nitrogen through the liquid nitrogen delivery pipe 14 to the inside of the cryogenic trimming machine cabinet 11, and then cool the rubber parts placed inside the cryogenic trimming basket 22 until the rubber parts are completely cooled to the operating temperature required by the equipment.

[0079] Subsequently, the staff used the control panel 13 to control the projectile to spray towards the cryogenic trimming basket 22 to complete the cryogenic trimming operation of the rubber parts.

[0080] During the above process, when the rubber parts are cooled by liquid nitrogen, the operator drives the stepper motor 51 to start through the control panel 13. The drive gear 52 fixedly connected to the top output shaft of the stepper motor 51 will rotate accordingly, and drive the two planetary gears 54 meshing on both sides of the drive gear 52 to rotate. The rotation of the planetary gears 54 will drive the driven gear ring 55 meshing with it to rotate, and drive the frozen trimming basket 22 fixedly installed on the driven gear ring 55 to rotate on the surface of the limiting frame 21.

[0081] It should be noted that during the above process, the frozen trimming basket 22 is restricted by the limiting frame 21 when it rotates, so the frozen trimming basket 22 will rotate stably on the top surface of the limiting frame 21.

[0082] When the drive gear 52 rotates, the turntable 53, which is coaxially fixed at its top, will rotate accordingly. The positioning sleeve 41, which is fixedly installed at the top of the turntable 53, will drive the telescopic sleeve 42, the connecting rod 43, and the traction ring 44 to rotate synchronously.

[0083] Since the traction ring 44 is fixedly connected to the bottom end of the swing arm 35, the swing arm 35 will rotate accordingly, driving the ring connecting rod 34, the positioning track component 33 and the limiting ring 31 to rotate. It should be noted that when the drive gear 52 rotates clockwise under the action of the output shaft of the stepper motor 51, the frozen trimming basket 22 and the wedge scraper 23 driven by the planetary gear 54 and the driven gear ring 55 will rotate counterclockwise. That is, the rotation direction of the frozen trimming basket 22 and the wedge scraper 23 is opposite to the rotation direction of the positioning track component 33 and the swing arm 35.

[0084] Meanwhile, when the stepper motor 51 rotates, its output shaft will indirectly drive the positioning track component 33 and the swing arm 35 to rotate synchronously. Since the bottom end of the positioning track component 33 is fixedly installed on the top surface of the turntable 53, the swing arm 35 will be subjected to centrifugal force in a direction away from the center of the frozen trimming basket during rotation. Due to the restriction of the traction ring 44, connecting rod 43 and telescopic sleeve 42 at the bottom end of the swing arm 35, the top end of the swing arm 35 will rotate away from the center of the frozen trimming basket 22 with the ring connecting rod 34 as the fulcrum.

[0085] During the above process, as the top of the swing rod 35 moves closer to the limiting ring 31, the top of the swing rod 35 will gradually move closer to the through groove 32 and be engaged with the through groove 32. At this time, the bottom of the swing rod 35 will move upward synchronously, and drive the telescopic sleeve 42 to move upward through the traction ring 44 and the connecting rod 43. During the upward movement of the telescopic sleeve 42, it is restricted by the positioning sleeve 41 and can only move in the vertical direction.

[0086] It should be noted that the swing arm 35 will rotate clockwise during the swing process, and cooperate with the counterclockwise rotating frozen trimming basket 22 and wedge scraper 23 to agitate the rubber parts located in the frozen trimming basket 22. At the same time, when the rubber parts move randomly under the action of the swing arm 35 and the frozen trimming basket 22, the swing arm 35 will be simultaneously subjected to the force of the rubber parts.

[0087] Meanwhile, the extrusion rod 25, which is fixedly connected to the wedge scraper 23, is located on the movement trajectory of the swing arm 35. Therefore, as the wedge scraper 23 moves, the extrusion rod 25 will come into contact with the top of the swing arm 35, causing the swing arm 35 to swing away from the wedge scraper 23. As the frozen trimming basket 22 continues to rotate, the swing arm 35 will be continuously subjected to centrifugal force, thus causing the swing arm 35 to be in a state of continuous rotation.

[0088] In addition, the reciprocating swing of the swing arm 35 will indirectly drive the telescopic sleeve 42 to reciprocate along the internal direction of the positioning sleeve 41 inside the positioning sleeve 41, repeatedly lifting the rubber parts on the telescopic sleeve 42, thereby facilitating the dispersion of the rubber parts piled together.

[0089] In the above process, the arrangement of the swing arm 35, the wedge scraper 23 and the telescopic sleeve 42 facilitates the dispersion of the rubber parts that are piled together, and avoids the rubber parts piled together affecting the penetration of the liquid nitrogen cold gas when the inclined freezing trimming basket 22 cools the rubber parts with liquid nitrogen, thus affecting the subsequent trimming operation of the rubber parts.

[0090] After the rubber parts have cooled down, the staff controls the projectiles via the control panel 13 to spray them into the rubber parts inside the freezing trimming basket 22. The projectiles collide with the rubber parts and utilize the difference in brittleness after cooling of rubber parts of different thicknesses to complete the trimming process.

[0091] It should be noted that during the above process, the stepper motor 51 will still operate under the control panel 13 and cooperate to agitate the rubber parts to prevent them from piling up. The rubber parts at the bottom of the piled-up area cannot make complete contact with the shot, thus affecting the trimming operation of the rubber parts.

[0092] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0093] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid nitrogen cryogenic trimming machine for rubber parts production, comprising a cryogenic trimming machine cabinet (11), a cabinet door (12) rotatably mounted on the top surface of one side of the cryogenic trimming machine cabinet (11) via a hinge, a control panel (13) provided on one side surface of the cryogenic trimming machine cabinet (11), a liquid nitrogen delivery pipe (14) fixedly connected to one side of the top of the cryogenic trimming machine cabinet (11), and a drive motor (15) detachably and fixedly mounted inside one side of the cryogenic trimming machine cabinet (11), characterized in that: It also includes a freezing processing component, a disturbance component, an auxiliary turning component and a drive component installed inside the freezer cabinet (11); The freezing processing assembly includes a limiting frame (21) fixedly mounted to the output shaft end of a drive motor (15) via a drive rod. A freezing trimming basket (22) is rotatably mounted on the top surface of the limiting frame (21). Wedge-shaped scrapers (23) are fixedly mounted in a circumferential array on the bottom surface of the inner wall of the limiting frame (21). A positioning ring (24) is fixedly connected to the bottom surface of multiple wedge-shaped scrapers (23). A pressing rod (25) is fixedly mounted on the side surface of multiple wedge-shaped scrapers (23) away from the inner wall of the freezing trimming basket (22). The disturbance component includes a limiting ring (31) that is rotatably mounted on the surface of multiple wedge scrapers (23) close to each other. The surface of the limiting ring (31) away from the wedge scrapers (23) is provided with through slots (32) in a circular array. A positioning track (33) is provided between adjacent through slots (32). The disturbance component also includes a circular connecting rod (34) fixedly installed in the middle of multiple positioning track components (33). The surface of the circular connecting rod (34) is arranged in a circular array with damped rotation and a swing rod (35) is installed. A connector (36) is fixedly installed between the surfaces of two adjacent swing rods (35). The auxiliary turning component works in conjunction with the freezing treatment component and the disturbance component to disturb the rubber parts inside the freezing trimming basket (22) to prevent the rubber parts from being piled up when the freezing trimming basket (22) is tilted, thus affecting the penetration of liquid nitrogen gas. The auxiliary flipping component includes a positioning sleeve (41) located at the center of the bottom of the frozen trimming basket (22). A telescopic sleeve (42) is slidably installed inside the positioning sleeve (41). A connecting rod (43) is fixedly installed in a circumferential array on the outer surface of the top of the telescopic sleeve (42). A traction ring (44) is rotatably installed inside the end of the connecting rod (43) away from the telescopic sleeve (42). The traction ring (44) is rotatably installed on the bottom surface of the swing arm (35). The extrusion rods (25) are all located below the limiting ring (31), and the extrusion rods (25) are located on the movement trajectory at the top of the positioning track (33).

2. The liquid nitrogen cryogenic trimming machine for rubber parts production according to claim 1, characterized in that: The center of the limiting frame (21) on the side away from the output shaft end of the drive motor (15) is rotatably mounted on the inner wall of the freeze trimming machine cabinet (11) via a metal round rod. The wedge scraper (23) is set against the inner wall of the freeze trimming basket (22), and the side of the wedge scraper (23) away from the freeze trimming basket (22) is composed of two inclined surfaces with different inclinations.

3. The liquid nitrogen cryogenic trimming machine for rubber parts production according to claim 1, characterized in that: The number of multiple swing rods (35) is matched with the number of through slots (32), and every two swing rods (35) are set between two adjacent positioning rails (33). The distance between two swing rods (35) located in two adjacent positioning rails (33) is greater than the distance between the swing rod (35) and the positioning rail (33).

4. The liquid nitrogen cryogenic trimming machine for rubber parts production according to claim 1, characterized in that: The drive assembly includes a stepper motor (51) fixedly installed inside the limiting frame (21). A drive gear (52) is fixedly installed on the top output shaft end of the stepper motor (51). A turntable (53) is fixedly connected to the top surface of the drive gear (52) coaxially. Planetary gears (54) are meshed on both sides of the drive gear (52) in a centrally symmetrical manner. The tooth surfaces of the two planetary gears (54) on the side away from the turntable (53) mesh together with a driven gear ring (55). A limiting disk (56) is fixedly installed on the top surface of the limiting frame (21).

5. A liquid nitrogen cryogenic trimming machine for rubber parts production according to claim 4, characterized in that: The limiting disc (56) is located inside the frozen trimming basket (22) and fits against the bottom surface of the frozen trimming basket (22). The drive gear (52), planetary gear (54) and driven gear ring (55) are rotatably mounted on the top surface of the limiting disc (56). The outer arc surface of the driven gear ring (55) is fixedly mounted to the bottom inner wall of the frozen trimming basket (22).

6. A liquid nitrogen cryogenic trimming machine for rubber parts production according to claim 4, characterized in that: The outer inclined surface of the turntable (53) fits against the inner surface of the driven toothed ring (55), sealing the bottom of the frozen trimming basket (22). The telescopic sleeve (42), the positioning sleeve (41), and the turntable (53) are arranged coaxially from top to bottom. The bottom surface of the positioning sleeve (41) is fixedly installed on the upper surface of the turntable (53).

7. A liquid nitrogen cryogenic trimming machine for rubber parts production according to claim 1, characterized in that: The surfaces of the positioning track (33) and the swing arm (35) on the side away from the frozen trimming basket (22) are both set as polygonal lines. The surface curve of the polygonal curved surface consists of a section of inclined curve, a section of horizontal curve, a section of short inclined curve and a section of long horizontal curve.

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