A grinding device for low-density hard rubber parts

Abstract

The present invention belongs to the technical field of parts grinding and processing, and specifically discloses a low-density hard rubber parts edge grinding processing device, including a two-way mixed grinding component and a base, the two-way mixed grinding component includes a central spindle, an inner ring auger and an outer ring auger, the inner ring auger is provided with a central sleeve, the inner ring auger is fixed to the central spindle through the central sleeve, one end of the outer ring auger is provided with an end sealing plate, the outer ring auger is fixed to the central spindle through the end sealing plate. The present invention utilizes the low density of the "porous material" to ensure that it is always within the effective pushing range of the outer ring auger, avoiding the workpiece from entering the range of action of the inner ring auger; not only that, this solution ensures that the abrasive inside the barrel is evenly distributed and the total amount is stable through abrasive recovery and two-way pushing, thereby achieving continuous throughput and grinding of the workpiece.

Description

Technical Field

[0001] This invention belongs to the field of low-density parts grinding and processing technology, specifically referring to a grinding and edge processing device for low-density hard rubber parts. Background Art

[0002] Low-density hard rubber materials mostly refer to hard rubber materials with many pores inside. They involve a foaming process during molding, so compared with traditional rubber materials, they have the characteristics of being lightweight and having excellent impact resistance. Therefore, they are widely used as cushioning and separating components such as bushings, bushings, and pads. Since the elasticity of this type of material is mainly achieved through its porous structure and its material itself is relatively hard, its edges need to be ground before leaving the factory to prevent debris from falling or the edges of parts from scratching the operator during installation and use.

[0003] Because these parts are small and have varied and complex shapes, traditional edge grinding devices not only have low grinding efficiency, but also require different programs and parameters to be matched for parts of different specifications.

[0004] Ball mills are a suitable and efficient technology for this type of work. However, ball mills are generally used to process metal parts with a density greater than or equal to that of abrasives. Therefore, the abrasives can "grind" the workpieces, and the workpieces can be driven laterally through the texture inside the ball mill. If a ball mill is used to process low-density materials, not only will the contact between the workpiece and the abrasives be insufficient, but the controllability of the workpiece movement will also be severely lacking. Summary of the Invention

[0005] To address the above issues and overcome the shortcomings of existing technologies, this invention proposes a low-density hard rubber parts grinding device. This solution utilizes the low density of porous materials, placing them within a fluid abrasive stream to ensure they remain within the effective pushing range of the outer auger, preventing the workpiece from entering the inner auger's operating range. Furthermore, this solution employs abrasive recycling and bidirectional pushing to ensure uniform abrasive distribution and stable total abrasive volume within the barrel, thereby achieving continuous feeding and grinding of the workpiece.

[0006] In addition, to further improve the grinding effect, the present invention also provides an arc-shaped protrusion on the outer ring of the outer ring auger; the lateral friction of the arc-shaped protrusion can make the workpiece rotate, thereby ensuring that the outer surface of the workpiece can fully contact the abrasive; the downward pressure of the protrusion of the arc-shaped protrusion can also make the workpiece partially "submerged" in the abrasive, thereby increasing the surface area of ​​the workpiece in contact with the abrasive at the same time and improving the grinding efficiency.

[0007] The technical solution adopted by this invention is as follows: This invention proposes a low-density hard rubber parts edge grinding processing device, including a bidirectional hybrid grinding assembly and a base. The bidirectional hybrid grinding assembly includes a central spindle, an inner auger, and an outer auger. The inner auger is provided with a central sleeve and is fixed to the central spindle through the central sleeve. One end of the outer auger is provided with an end cap and is fixed to the central spindle through the end cap. By rotating the central spindle, the inner and outer augers can be rotated simultaneously. The helical directions of the blades of the inner and outer augers are opposite, and the helical blades of the inner and outer augers do not overlap in the axial projection.

[0008] The inner and outer augers push the abrasive in opposite directions. By designing the inner and outer augers, the lateral movement speed of the abrasive in both directions can be balanced, thus preventing the abrasive from accumulating in one direction. Since the inner and outer augers rotate at the same speed, the factors affecting the pushing effect mainly include: whether the blades are hollow, the axial projected area of ​​the blades, and the helical distance of the blades.

[0009] The density of abrasive is much greater than that of porous materials, and the diameter of abrasive particles is small. Therefore, when the abrasive is kept flowing, the part will be located on top of the abrasive (similar to that in a liquid, but the abrasive has a lower fluidity than the liquid).

[0010] Furthermore, the outer ring of the auger is also provided with arc-shaped protrusions and connecting rods evenly distributed in a ring, wherein the number of connecting rods is less than the number of arc-shaped protrusions, and the connecting rods are connected to the end sealing plate.

[0011] Since the workpiece "floats" on the upper surface of the abrasive, the lateral friction of the arc-shaped protrusion allows the workpiece to rotate, thus ensuring that the outer surface of the workpiece can fully contact the abrasive. The downward pressure of the protrusion of the arc-shaped protrusion also allows part of the workpiece to "submerge" into the abrasive, thereby increasing the surface area of ​​contact between the workpiece and the abrasive at the same time and improving the grinding efficiency.

[0012] Preferably, the bidirectional mixing and grinding assembly further includes a material cylinder, which is disposed on a base. The central spindle, inner auger, and outer auger are all rotatably disposed in the material cylinder. The central spindle extends from one end of the material cylinder, and a main gear is provided on the end of the central spindle located outside the material cylinder. The outer ring of the outer auger is in contact with the inner wall of the material cylinder.

[0013] The finished workpiece is discharged from the outlet. Inevitably, some abrasive material will also be discharged. This abrasive material is collected and can be reintroduced into the barrel through the return port.

[0014] As a further preferred embodiment of the present invention, a feed inlet is provided at the top of one end of the barrel, and the length of the arc-shaped convex tube does not reach the feed inlet, so the parts in the feed inlet can fall into the barrel through the gap of the connecting rod. A discharge outlet is provided at the other end of the barrel, and a return outlet is provided below the discharge outlet. The abrasive that falls with the workpiece in the discharge outlet can re-enter the barrel through the return outlet.

[0015] Furthermore, it also includes a screening and reflux assembly, which includes a collection hood, side baffles and an arc-shaped screen. The collection hood is fixed to the outside of the reflux port, the side baffles are fixed to the material cylinder and are located on both sides of the discharge port, one end of the arc-shaped screen is fixed to the material cylinder and the other end of the arc-shaped screen is fixed to the collection hood.

[0016] The screening and reflux assembly can screen the workpieces and abrasives discharged from the outlet.

[0017] Preferably, the lowest point of the arc-shaped screen is located above the collection hood.

[0018] Furthermore, it also includes a rotating stop assembly, which includes a stop shaft and a stop wheel. The outer surface of the collection cover is provided with an external boss, and the external boss is provided with a through hole. The stop shaft is rotatably disposed in the through hole, and the stop wheel is fixedly connected to the stop shaft.

[0019] Preferably, the stop wheel is composed of several independent wheels, and the arc-shaped screen is arrayed with straight screening grooves, with the stop wheel located in the straight screening grooves.

[0020] Since abrasive particles tend to accumulate inside parts with central holes, storing the parts on an arc-shaped screen for a period of time and rotating them using a stop wheel can remove most of the abrasive particles from the workpiece, thereby reducing abrasive consumption.

[0021] As a further preferred embodiment of the present invention, the rotary stop assembly further includes a stop motor, which is disposed on an external boss, and the output shaft of the stop motor is connected to the stop long shaft.

[0022] The blades of the outer auger have hollowed-out sections larger than the diameter of the abrasive.

[0023] The curved screen also has an upward curve on both sides, which allows the workpiece to automatically slide towards the center position as it slides along the curved screen.

[0024] The beneficial effects achieved by the present invention using the above structure are as follows:

[0025] (1) The inner and outer augers push the abrasive in opposite directions. By designing the inner and outer augers, the lateral movement speed of the abrasive in the two directions can be balanced, thereby preventing the abrasive from accumulating in one direction.

[0026] (2) The density of abrasive is much greater than that of porous materials, and the diameter of abrasive particles is small. Therefore, when the abrasive is kept flowing, the part will be located on top of the abrasive.

[0027] (3) Since the workpiece “floats” on the upper surface of the abrasive, the workpiece can rotate through the lateral friction of the arc-shaped convex tube, thus ensuring that the outer surface of the workpiece can fully contact the abrasive; through the downward pressure of the protrusion of the arc-shaped convex tube, the workpiece can also be partially “submerged” in the abrasive, thereby increasing the surface area of ​​the workpiece in contact with the abrasive at the same time and improving the grinding efficiency.

[0028] (4) The workpiece after grinding is discharged from the discharge port. At this time, some abrasive will inevitably be discharged together. This part of the abrasive can be collected and re-enter the barrel through the return port.

[0029] (5) The screening and reflux assembly can screen the workpieces and abrasives discharged from the outlet.

[0030] (6) Since abrasive material is easily retained inside the part with a central hole, the part is left on the arc screen for a period of time and rotated by the stop wheel, which can discharge most of the abrasive material inside the workpiece, thereby reducing the consumption of abrasive material.

[0031] (7) The blades of the outer ring auger are provided with a hollow part larger than the diameter of the abrasive, which can further improve the grinding efficiency. Attached Figure Description

[0032] Figure 1 This is a perspective view of a low-density hard rubber parts grinding device proposed in this invention;

[0033] Figure 2 This is a front view of a low-density hard rubber parts grinding device proposed in this invention;

[0034] Figure 3 This is a left view of a low-density hard rubber parts grinding device proposed in this invention.

[0035] Figure 4 for Figure 3 A cross-sectional view along section line AA;

[0036] Figure 5 for Figure 4 A cross-sectional view along the cutting line BB;

[0037] Figure 6This is a half-sectional schematic diagram of a low-density hard rubber parts edge grinding processing device proposed in this invention.

[0038] Figure 7 for Figure 1 A magnified view of a section at point I;

[0039] Figure 8 for Figure 4 Enlarged view of a section at point II;

[0040] Figure 9 A three-dimensional view of the outer auger;

[0041] Figure 10 A schematic diagram showing the movement direction of the workpiece and the abrasive. Figure 1 ;

[0042] Figure 11 A schematic diagram showing the movement direction of the workpiece and the abrasive. Figure 2 .

[0043] The components include: 1. Bidirectional mixing and grinding assembly; 2. Screening and reflux assembly; 3. Rotary stop assembly; 4. Base; 5. Central spindle; 6. Inner ring auger; 7. Outer ring auger; 8. Material cylinder; 9. Main gear; 10. Central sleeve; 11. Arc-shaped protrusion tube; 12. Connecting rod; 13. End sealing plate; 14. Feed inlet; 15. Discharge outlet; 16. Reflux port; 17. Collection cover; 18. Side baffle; 19. Arc-shaped screen; 20. External boss; 21. Through hole; 22. Stop motor; 23. Stop long shaft; 24. Stop wheel.

[0044] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0047] like Figures 1-9 As shown, the present invention proposes a low-density hard rubber parts edge grinding device, including a bidirectional hybrid grinding assembly 1 and a base 4. The bidirectional hybrid grinding assembly 1 includes a central spindle 5, an inner auger 6 and an outer auger 7. The inner auger 6 is provided with a central sleeve 10 and is fixed to the central spindle 5 through the central sleeve 10. One end of the outer auger 7 is provided with an end sealing plate 13 and is fixed to the central spindle 5 through the end sealing plate 13. By rotating the central spindle 5, the inner auger 6 and the outer auger 7 can be rotated simultaneously. The helical directions of the blades of the inner auger 6 and the outer auger 7 are opposite, and the helical blades of the inner auger 6 and the outer auger 7 do not overlap in the axial projection.

[0048] The inner auger 6 and the outer auger 7 push the abrasive in opposite directions. By designing the inner auger 6 and the outer auger 7, the lateral movement speed of the abrasive in the two directions can be balanced, thereby preventing the abrasive from accumulating in one end. Since the inner auger 6 and the outer auger 7 rotate at the same speed, the factors affecting the pushing effect mainly include: whether the blades are hollow, the axial projected area of ​​the blades, and the spiral distance of the blades.

[0049] The density of abrasive is much greater than that of porous materials, and the diameter of abrasive particles is small. Therefore, when the abrasive is kept flowing, the part will be located on top of the abrasive (similar to that in a liquid, but the abrasive has a lower fluidity than the liquid).

[0050] The outer ring of the auger 7 is also provided with arc-shaped protrusions 11 and connecting rods 12 evenly distributed in a ring. The number of connecting rods 12 is less than the number of arc-shaped protrusions 11. The connecting rods 12 are connected to the end sealing plate 13.

[0051] Since the workpiece "floats" on the upper surface of the abrasive, the workpiece can rotate through the lateral friction of the arc-shaped protrusion 11, thus ensuring that the outer surface of the workpiece can fully contact the abrasive. The downward pressure of the protrusion of the arc-shaped protrusion 11 can also make the workpiece partially "submerged" in the abrasive, thereby increasing the surface area of ​​the workpiece in contact with the abrasive at the same time and improving the grinding efficiency.

[0052] The bidirectional mixing and grinding assembly 1 also includes a material cylinder 8, which is mounted on a base 4. The central spindle 5, the inner auger 6, and the outer auger 7 are all rotatably mounted in the material cylinder 8. The central spindle 5 extends from one end of the material cylinder 8, and a main gear 9 is provided on the end of the central spindle 5 located outside the material cylinder 8. The outer ring of the outer auger 7 is in contact with the inner wall of the material cylinder 8.

[0053] The finished workpiece is discharged from the discharge port 15. Inevitably, some abrasive material will be discharged along with it. This abrasive material is collected and can be re-entered into the feed cylinder 8 through the return port 16.

[0054] The top of one end of the barrel 8 is provided with a feed port 14. The length of the arc-shaped protrusion 11 does not reach the feed port 14, so the parts in the feed port 14 can fall into the barrel 8 through the gap of the connecting rod 12. The other end of the barrel 8 is provided with a discharge port 15. Below the discharge port 15 is a return port 16. The abrasive that falls with the workpiece in the discharge port 15 can re-enter the barrel 8 through the return port 16.

[0055] It also includes a screening and reflux assembly 2, which includes a collection hood 17, a side baffle 18, and an arc-shaped screen 19. The collection hood 17 is fixed to the outside of the reflux port 16, the side baffle 18 is fixed to the material cylinder 8, and the side baffle 18 is located on both sides of the discharge port 15. One end of the arc-shaped screen 19 is fixed to the material cylinder 8, and the other end of the arc-shaped screen 19 is fixed to the collection hood 17.

[0056] The screening and reflux assembly 2 can screen the workpieces and abrasives discharged from the discharge port 15.

[0057] The lowest point of the arc-shaped screen 19 is located above the collection hood 17.

[0058] It also includes a rotating stop assembly 3, which includes a stop shaft 23 and a stop wheel 24. The outer surface of the collection cover 17 is provided with an external boss 20, and the external boss 20 is provided with a through hole 21. The stop shaft 23 is rotatably disposed in the through hole 21, and the stop wheel 24 is fixedly connected to the stop shaft 23.

[0059] The stop wheel 24 is composed of several independent wheels, and the arc-shaped screen 19 is provided with a straight screening groove, in which the stop wheel 24 is located.

[0060] Since abrasive material tends to accumulate inside parts with central holes, leaving the parts on the arc-shaped screen 19 for a period of time and rotating them using the stop wheel 24 can discharge most of the abrasive material from inside the workpiece, thereby reducing the consumption of abrasive material.

[0061] The rotary stop assembly 3 also includes a stop motor 22, which is mounted on the external boss 20. The output shaft of the stop motor 22 is connected to the stop long shaft 23.

[0062] The blades of the outer ring auger 7 have hollowed-out sections larger than the diameter of the abrasive.

[0063] The curved screen 19 also has curved upward curves on both sides, which allows the workpiece to automatically slide towards the middle position as it slides along the curved screen 19.

[0064] like Figure 10As shown, the arrows inside the barrel 8 indicate the direction of movement of the workpiece and the abrasive. Under the pushing action of the inner ring auger 6 and the outer ring auger 7, the abrasive in the central area A and the outer area B move in opposite directions.

[0065] The double-line arrows on the outside of the barrel 8 indicate the movement trajectory and direction of the abrasive, while the single-line arrows on the outside of the barrel 8 indicate the movement trajectory and direction of the workpiece (upper) and the rotation direction of the stop wheel 24 (lower).

[0066] like Figure 11 As shown, area A represents the effective working range of the inner auger 6, area B represents the effective working range of the outer auger 7, and the horizontal dashed line represents the upper surface of the abrasive. Under the joint push of the abrasive and the outer auger 7, the workpiece will be axially pushed along a position biased to one side (the dashed circle represents the workpiece). At this time, the arc-shaped convex tube 11 moves the workpiece to rotate (the rotation direction is shown by the arc-shaped arrow), and on the other hand, it squeezes the workpiece, causing it to sink towards the bottom of the dashed line (the pressing direction is shown by the straight arrow).

[0067] In practical use, the user first needs to start the stop motor 22, which meshes with the main gear 9 through an external drive gear, and drives the central spindle 5 to rotate continuously through an external drive device. While rotating, the central spindle 5 also drives the inner auger 6 and the outer auger 7 to rotate. Since the spiral directions of the blades of the inner auger 6 and the outer auger 7 are opposite, the inner auger 6 and the outer auger 7 push the abrasive in opposite directions. Through the design of the inner auger 6 and the outer auger 7, the lateral movement speed of the abrasive in the two directions can be balanced, thereby preventing the abrasive from accumulating at one end. Since the rotation speed of the inner auger 6 and the outer auger 7 is the same, the factors affecting the pushing effect mainly include: whether the blades are hollow, the axial projected area of ​​the blades, and the spiral distance of the blades.

[0068] When the workpiece is placed into the feed inlet 14, it will fall into the material cylinder 8 under its own weight. Since the length of the arc-shaped convex tube 11 does not extend below the feed inlet 14, there are only sparse connecting rods 12 below the feed inlet 14. When there are no connecting rods 12 blocking the feed inlet 14, the workpiece will fall smoothly into the material cylinder 8.

[0069] Because the density of the "porous material" is much smaller than that of the abrasive, the workpiece will "float" on the upper surface of the abrasive while the abrasive is kept flowing. The abrasive's fluidity can be maintained by the stirring of the inner ring auger 6 and the outer ring auger 7, which in turn causes relative motion and friction between the abrasive and the workpiece. Through this disordered friction and impact, the workpiece surface can be ground.

[0070] During the grinding process, the blades of the outer ring auger 7 will also push the workpiece axially. Under the action of this thrust, the workpiece can be stably moved from below the feed port 14 to the discharge port 15 and fall from the discharge port 15.

[0071] Meanwhile, since the blades of the outer ring auger 7 are inclined, the workpiece will shift to one side of the barrel 8 when it moves. Therefore, even if the diameter of the workpiece is different, the top can still contact the arc-shaped protrusion 11. The arc-shaped protrusion 11 can rotate the workpiece through its own friction, thereby ensuring that the outer surface of the workpiece can fully contact the abrasive. The downward pressure of the protrusion of the arc-shaped protrusion 11 can also make the workpiece partially "submerged" in the abrasive, thereby increasing the surface area of ​​the workpiece in contact with the abrasive at the same time and improving the grinding efficiency.

[0072] The finished workpiece falls onto the arc-shaped screen 19 through the discharge port 15, and the abrasive falls into the collection hood 17 through the gaps in the arc-shaped screen 19, and then re-enters the material cylinder 8 through the return port 16.

[0073] Since the lowest point of the arc screen 19 is located above the collection cover 17, and with the addition of the stop wheel 24, the workpiece will not slide directly off the arc screen 19, but will stay on the arc screen 19 for a period of time. At this time, due to the rotation of the stop wheel 24, the workpiece will also rotate, thereby discharging most of the abrasive residue inside the workpiece. When the next workpiece slides off, it will be pushed out.

[0074] As long as the workpiece can stay on the arc screen 19 for a period of time, most of the abrasive inside can be discharged, whether by rotation or vibration. Therefore, the number of workpieces on the arc screen 19 is not important.

[0075] As another new embodiment of the present invention, the blades of the outer ring auger 7 are provided with a hollow portion larger than the diameter of the abrasive. In this case, the pushing effect of the outer ring auger 7 on the abrasive will be weakened, but the pushing effect on the workpiece remains unchanged. This design can further increase the relative motion between the workpiece and the abrasive, and further improve the grinding efficiency. When using this scheme, it is still necessary to ensure that the pushing speeds of the inner ring auger 6 and the outer ring auger 7 are matched to each other to avoid the abrasive accumulating at one end.

[0076] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0077] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A grinding device for low-density hard rubber parts, characterized in that: The assembly includes a bidirectional hybrid grinding component (1) and a base (4). The bidirectional hybrid grinding component (1) includes a central spindle (5), an inner auger (6) and an outer auger (7). The inner auger (6) is provided with a central sleeve (10). The inner auger (6) is fixed to the central spindle (5) through the central sleeve (10). One end of the outer auger (7) is provided with an end cap (13). The outer auger (7) is fixed to the central spindle (5) through the end cap (13). By rotating the central spindle (5), the inner auger (6) and the outer auger (7) can rotate simultaneously. The blades of the inner auger (6) and the outer auger (7) have opposite spiral directions. The spiral blades of the inner auger (6) and the outer auger (7) do not overlap in axial projection. The outer ring of the auger (7) is also provided with arc-shaped protrusions (11) and connecting rods (12) evenly distributed in an annular pattern. The number of connecting rods (12) is less than the number of arc-shaped protrusions (11). The connecting rods (12) are connected to the end sealing plate (13). The bidirectional mixing and grinding assembly (1) also includes a barrel (8), which is mounted on a base (4). The central spindle (5), inner auger (6), and outer auger (7) are all rotatably mounted in the barrel (8). The central spindle (5) extends from one end of the barrel (8). A main gear (9) is provided on one end of the central spindle (5) located outside the barrel (8). The outer ring of the outer auger (7) is in contact with the inner wall of the barrel (8). The top of one end of the barrel (8) is provided with a feed inlet (14). The length of the arc-shaped convex tube (11) does not reach the feed inlet (14), so the parts in the feed inlet (14) can pass through the gap of the connecting rod (12) and fall into the barrel (8). The other end of the barrel (8) is provided with a discharge port (15). Below the discharge port (15) is a return port (16). The abrasive that falls with the workpiece in the discharge port (15) can re-enter the barrel (8) through the return port (16). It also includes a screening and reflux assembly (2), which includes a collection hood (17), a side baffle (18) and an arc screen (19). The collection hood (17) is fixed to the outside of the reflux port (16), the side baffle (18) is fixed to the material cylinder (8), the side baffle (18) is located on both sides of the discharge port (15), one end of the arc screen (19) is fixed to the material cylinder (8), and the other end of the arc screen (19) is fixed to the collection hood (17).

2. The low-density hard rubber parts edge grinding device according to claim 1, characterized in that: The lowest point of the arc-shaped screen (19) is located above the collection hood (17).

3. The low-density hard rubber parts edge grinding device according to claim 2, characterized in that: It also includes a rotating stop assembly (3), which includes a stop shaft (23) and a stop wheel (24). The outer surface of the collection cover (17) is provided with an external boss (20), and the external boss (20) is provided with a through hole (21). The stop shaft (23) is rotatably disposed in the through hole (21), and the stop wheel (24) is fixedly connected to the stop shaft (23).

4. The low-density hard rubber parts edge grinding device according to claim 3, characterized in that: The stop wheel (24) is composed of several independent wheels. The arc-shaped screen (19) is provided with a straight screening groove, and the stop wheel (24) is located in the straight screening groove.

5. The low-density hard rubber parts edge grinding device according to claim 4, characterized in that: The rotary stop assembly (3) also includes a stop motor (22), which is mounted on an external boss (20). The output shaft of the stop motor (22) is connected to the stop long shaft (23).

6. The low-density hard rubber parts edge grinding device according to claim 5, characterized in that: The outer ring auger (7) has a hollowed-out part on its blades that is larger than the diameter of the abrasive.

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