Extruder semi-automatic mirror polishing device

Abstract

The application discloses a kind of extruder semi-automatic mirror polishing device, belong to extruder screw polishing technical field, including polishing table, be provided with mirror polishing unit by thread polishing mechanism and screw polishing mechanism on polishing table.The thread polishing mechanism of the application is slid by connecting rod and polishing sliding frame, to limit the rotational freedom of polishing ring, form the screw thread pair movement mechanism with the polishing seat of adjustable axial position, so that polishing wheel group and the thread surface of extruder screw dynamically fit, the thread surface of screw does not cause polishing interruption due to non-equal distance setting of thread, and screw polishing mechanism is linked based on variable-diameter arc slider and multistage abrasive belt, driven by servo motor, realize the continuous adjustment of abrasive belt transmission radius, and cooperate with the mesh gradient configuration of multistage abrasive belt, can realize the single-pass progressive polishing process to the screw part of extruder screw, reach the effect of improving the polishing quality and efficiency of extruder screw surface.

Description

Technical Field

[0001] This invention relates to the field of extruder screw polishing technology, and more particularly to a semi-automatic mirror polishing device for extruders. Background Technology

[0002] After processing, the extruder screw needs to be polished to improve its smoothness, reduce the frictional resistance between the material inside the extruder and the screw, make the melt flow more smoothly, and improve the extruder's conveying efficiency.

[0003] Currently, polishing equipment for extruder screws generally uses two methods: hard polishing and soft polishing. By gradually increasing the abrasive mesh size and polishing speed of the polishing equipment, the smoothness of the extruder screw can be improved. However, this polishing method results in a large number of polishing passes. In addition, traditionally, the screw thread and the screw shaft are polished separately, and they cannot be polished simultaneously. Therefore, when polishing the extruder screw, each part needs to be polished multiple times, which increases the overall polishing time of the extruder screw and reduces the overall polishing efficiency.

[0004] Furthermore, the current extruder screw thread pitch needs to be set to a non-equidistant state to cope with the different thrust of materials with different densities injected into different parts of the pipeline. However, conventional extruder polishing equipment can only use flexible polishing abrasive belts to polish the threaded parts at equal intervals when polishing extruder screws with non-equidistant threads. It cannot grind the threaded parts according to the changes of the screw, resulting in orange peel and pitting on the polished screw threaded parts, which reduces the polishing quality of the extruder screw. Summary of the Invention

[0005] The purpose of this invention is to solve the problems raised in the prior art by proposing a semi-automatic mirror polishing device for an extruder.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A semi-automatic mirror polishing device for an extruder includes a polishing table for polishing the extruder screw, wherein a mirror polishing unit is provided on the polishing table, and the mirror polishing unit consists of a thread polishing mechanism and a screw polishing mechanism;

[0008] The thread polishing mechanism includes a polishing sliding frame on a polishing table, a thread polishing ring connected to the polishing sliding frame via a connecting rod, a strip polishing seat fixedly mounted on the thread polishing ring, and a pair of polishing wheels slidably mounted on the strip polishing seat via a slider. Each pair of polishing wheels is movably connected via an elastic contraction component.

[0009] The screw polishing mechanism consists of a differential polishing assembly and a differential polishing drive assembly. The differential polishing assembly includes a screw polishing seat mounted on a polishing table. A sanding stabilizing frame is mounted on the screw polishing seat. A sanding drive wheel is mounted on the sanding stabilizing frame. A servo motor is mounted at one end of the sanding drive wheel. The sanding drive wheel is connected to a driven wheel of equal diameter via a multi-stage sanding belt drive.

[0010] Preferably, one end of the extruder screw is rotatably mounted on the polishing table via a stepper motor, and the other end of the extruder screw is provided with a rotating push rod that is rotatably connected to the polishing table.

[0011] Preferably, the inner wall of the strip polishing seat is provided with a polishing groove, and the top of the polishing wheel is provided with a rotating seat fixed to the slider, and the rotating seat is slidably connected to the strip polishing seat.

[0012] Preferably, the elastic shrinkage assembly includes an elastic shrinkage rod and a rotating sleeve fitted on the surface of each pair of polishing wheels. A tension spring is provided inside the elastic shrinkage rod, and the polishing wheel shrinks through the tension spring to always fit against the threaded part of the extruder screw.

[0013] Preferably, the spacing between each pair of polishing wheels is determined by the pitch of adjacent threads of the extruder screw, and the outer surfaces of multiple pairs of polishing wheels are provided with abrasive surfaces of the same mesh size.

[0014] Preferably, the abrasive drive wheels are arranged in pairs, and each pair of abrasive drive wheels is radially slidably connected to a variable diameter arc-shaped slider on opposite sides via a variable diameter groove, and the multi-stage abrasive belt is sleeved on the outer surface of the variable diameter arc-shaped slider.

[0015] Preferably, the multi-stage abrasive belt consists of a first-stage abrasive belt, a second-stage abrasive belt, and a third-stage abrasive belt with progressively increasing mesh sizes, and the linear speeds of the first-stage, second-stage, and third-stage abrasive belts are driven by variable-diameter arc-shaped sliders of different diameters, gradually increasing in speed.

[0016] Preferably, the differential polishing drive assembly includes a drive screw disposed on the polishing table, one end of the drive screw being rotatably connected to the polishing table via a drive motor, and the drive screw being threadedly connected to the inner wall of the screw polishing seat.

[0017] Preferably, the screw polishing seat is inclined, and the inclination direction is adapted to the inclination direction of the adjacent threads on the upper surface of the extruder screw, and the drive screw shaft is arranged parallel to the extruder screw shaft.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The present invention designs a thread polishing mechanism that restricts the rotational freedom of the polishing ring by sliding the connecting rod and the polishing sliding frame. Combined with the axially adjustable polishing seat, it forms a thread-like motion mechanism, which enables the polishing wheel set to dynamically fit with the thread surface of the extruder screw. The screw thread surface will not be interrupted due to the non-equidistant setting of the threads, thus improving the polishing quality and efficiency of the extruder screw thread part.

[0020] 2. The screw polishing mechanism is based on the linkage between the variable diameter arc-shaped slider and the multi-stage abrasive belt. Driven by a servo motor, it realizes the continuous adjustment of the abrasive belt transmission radius. With the multi-stage abrasive belt mesh gradient configuration, it can realize the single-pass progressive polishing process of the screw part of the extruder screw.

[0021] 3. In the reverse-drive mirror polishing unit, the present invention configures the mesh size of the reverse multi-stage abrasive belt and adopts the radius gradient flipping technology in the reverse stroke, combined with the polishing ring phase synchronization adjustment mechanism, to form a forward and reverse angle polishing cycle, thereby improving the polishing efficiency and polishing quality of the extruder screw. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of a semi-automatic mirror polishing device for an extruder proposed in this invention;

[0023] Figure 2 For the present invention Figure 1 Enlarged view of the structure at point A in the middle;

[0024] Figure 3 For the present invention Figure 1 Enlarged view of the structure at point B;

[0025] Figure 4 This is an assembly view of the overall structure of a semi-automatic mirror polishing device for an extruder proposed in this invention;

[0026] Figure 5 This is a schematic diagram of the structure of the threaded polishing ring in a semi-automatic mirror polishing device for an extruder proposed in this invention;

[0027] Figure 6 This is a schematic diagram of the structure of the polishing wheel and the rotating sleeve in a semi-automatic mirror polishing device for an extruder proposed in this invention;

[0028] Figure 7 This is a schematic diagram of the differential polishing drive component in a semi-automatic mirror polishing device for an extruder proposed in this invention.

[0029] Reference numerals: 1. Polishing table; 11. Stepper motor; 12. Rotary ejector pin; 2. Extruder screw; 3. Polishing sliding frame; 31. Threaded polishing ring; 32. Strip polishing seat; 33. Polishing wheel; 331. Rotary seat; 34. Rotary sleeve; 341. Elastic retraction rod; 4. Screw polishing seat; 41. Abrasive stabilizing frame; 42. Abrasive drive wheel; 421. Servo motor; 43. Multi-stage abrasive belt; 431. First-stage abrasive belt; 432. Second-stage abrasive belt; 433. Third-stage abrasive belt; 44. Equal diameter driven wheel; 45. Variable diameter arc-shaped slider; 5. Drive motor; 51. Drive screw. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example, refer to Figures 1 to 7 A semi-automatic mirror polishing device for an extruder includes a polishing table 1 for polishing the extruder screw 2, and a mirror polishing unit is provided on the polishing table 1. The mirror polishing unit consists of a thread polishing mechanism and a screw polishing mechanism.

[0034] Furthermore, one end of the extruder screw 2 is rotatably mounted on the polishing table 1 via the stepper motor 11, and the other end of the extruder screw 2 is provided with a rotating push rod 12 rotatably connected to the polishing table 1. A rotating frame fixed by bolts is provided at the rotating push rod 12, which can lock the other end of the extruder screw 2 after it is installed on the output shaft of the stepper motor 11.

[0035] It should be noted that when the stepper motor 11 drives the extruder screw 2 to rotate, the threaded part and the screw part can move relative to the mirror polishing unit. At this time, the thread polishing mechanism can always keep in contact with the threaded part with the changing pitch and polish the threads at all parts of the screw. At the same time, the screw polishing mechanism following the thread polishing mechanism can gradually increase the mesh size and polishing speed in the screw polishing process. Thus, while the surface of the extruder screw 2 is polished quickly, the non-equidistant threads on its surface will not prevent the polishing mechanism from being unable to keep in contact for polishing. This improves the polishing quality of the extruder screw 2 and speeds up the polishing process.

[0036] like Figure 2 and Figures 4 to 6 As shown, the thread polishing mechanism includes a polishing sliding frame 3 set on the polishing table 1. The polishing sliding frame 3 is connected to a thread polishing ring 31 via a connecting rod. A strip polishing seat 32 is fixedly set on the thread polishing ring 31. A pair of polishing wheels 33 are slidably set on the strip polishing seat 32 via a slider. Each pair of polishing wheels 33 is movably connected via an elastic contraction component.

[0037] Furthermore, the inner wall of the strip polishing seat 32 is provided with a polishing groove, and the top of the polishing wheel 33 is provided with a rotating seat 331 fixed to the slider, and the rotating seat 331 is slidably connected to the strip polishing seat 32.

[0038] Furthermore, the elastic shrinkage assembly includes an elastic shrinkage rod 341 and a rotating sleeve 34 sleeved on the surface of each pair of polishing wheels 33. A tension spring is provided inside the elastic shrinkage rod 341. The polishing wheel 33 shrinks through the tension spring and always fits against the threaded part of the extruder screw 2. Other similar materials with rebound force, such as buffer cylinders and connecting rods made of elastic materials, can also be used inside the elastic shrinkage rod 341.

[0039] Furthermore, the spacing between each pair of polishing wheels 33 is determined by the pitch of the adjacent threads of the extruder screw 2, and the outer surfaces of multiple pairs of polishing wheels 33 are provided with abrasive surfaces of the same mesh size as the polishing requirements of the threaded parts. This allows the extruder screw 2 to rotate under the drive of the stepper motor 11, thereby generating a driving force that moves the strip polishing seat 32 along the screw axis, so that multiple pairs of polishing wheels 33 always fit against the threaded parts to polish the extruder screw 2.

[0040] It should be noted that the thread polishing ring 31 is slidably connected to the polishing sliding frame 3 via a connecting rod, which can limit the rotation angle of the thread polishing ring 31, making it similar to a threaded rod driving a threaded sleeve structure. This allows the strip polishing seat 32 to move along the screw axis and always fit against the threaded part of the extruder screw 2. By setting multiple pairs of polishing wheels 33 to polish the threaded part simultaneously, the polishing speed of the threaded part of the extruder screw 2 can be accelerated, and its polishing efficiency can be improved.

[0041] like Figure 3 , Figure 4 and Figure 7 As shown, the screw polishing mechanism consists of a differential polishing assembly and a differential polishing drive assembly. The differential polishing assembly includes a screw polishing seat 4 mounted on a polishing table 1. A sanding stabilizer 41 is mounted on the screw polishing seat 4. A sanding drive wheel 42 is mounted on the sanding stabilizer 41. A servo motor 421 is mounted at one end of the sanding drive wheel 42. Each pair of sanding drive wheels 42 is connected to a driven wheel 44 of equal diameter via a multi-stage sanding belt 43.

[0042] Furthermore, the abrasive drive wheels 42 are arranged in pairs, and the opposite side of the abrasive drive wheels 42 is radially slidably connected to the variable diameter arc slider 45 through the variable diameter groove. The multi-stage abrasive belt 43 is sleeved on the outer surface of the variable diameter arc slider 45. The variable diameter arc slider 45 is driven by the existing jaw drive structure. Its variable diameter drive process is the same as the variable diameter principle of the movable jaw of the existing three-jaw chuck. It is existing technology. The variable diameter drive of the variable diameter arc slider 45 will not be described in detail in the following.

[0043] Furthermore, the multi-stage abrasive belt 43 is composed of a first-stage abrasive belt 431, a second-stage abrasive belt 432, and a third-stage abrasive belt 433 with successively increasing mesh sizes. The linear speeds of the first-stage abrasive belt 431, the second-stage abrasive belt 432, and the third-stage abrasive belt 433 are driven by variable-diameter arc-shaped sliders 45 of different diameters, gradually increasing. The multi-stage abrasive belt 43 is a flexible abrasive belt, which, under the drive of the servo motor 421, ensures that the lower surface of the abrasive belt is always in contact with the screw portion of the upper surface of the extruder screw 2 at the threaded interval, thereby enabling the screw portion to be polished step by step, accelerating the polishing speed of the extruder screw 2.

[0044] like Figure 4As shown, the differential polishing drive assembly includes a drive screw 51 mounted on the polishing table 1. One end of the drive screw 51 is rotatably connected to the polishing table 1 via a drive motor 5, and the drive screw 51 is threadedly connected to the inner wall of the screw polishing seat 4. The screw polishing seat 4 is inclined, and the inclination direction is adapted to the inclination direction of the adjacent threads on the upper surface of the extruder screw 2. The axis of the drive screw 51 is parallel to the axis of the extruder screw 2. The rotation speed of the drive motor 5 is adapted to the rotation speed of the stepper motor 11, so that when the threads on the upper surface of the extruder screw 2 rotate, the lower surface of the abrasive belt is in contact with the screw portion at the threaded interval.

[0045] It should be noted that the variable-diameter arc-shaped slider 45 located between two adjacent abrasive drive wheels 42 can change the transmission radius of the corresponding multi-stage abrasive belt 43 by changing the distance between it and the axis of the abrasive drive wheel 42. Since the linear speed of the transmission belt is equal to the linear speed of the drive wheel, the linear speed of the transmission belt depends on the angular velocity and rotation radius of the drive wheel. Since the abrasive drive wheels 42 are driven by the same servo motor 421 output shaft and have the same angular velocity, the transmission speed of the abrasive belt can be changed when the variable-diameter arc-shaped slider 45 changes the transmission radius of the multi-stage abrasive belt 43. Thus, different polishing speeds can be achieved on the screw part of the extruder screw 2 through the same motor, achieving the effect of polishing the screw part step by step. This eliminates the need for repeated processes of different abrasive mesh and polishing speeds on the screw part, thereby improving the polishing efficiency of the screw part of the extruder screw 2.

[0046] Based on the above, when the extruder screw 2 moves the mirror polishing unit to the rotating push rod 12 via the stepper motor 11, the multi-stage abrasive belt 43 on the abrasive drive wheel 42 can be replaced so that the abrasive belt that first contacts the extruder screw 2 has a higher mesh count than the original three-stage abrasive belt 433, and the subsequent abrasive belts are replaced step by step. That is, at this time, the mesh count of the first-stage abrasive belt 431 in the reverse movement process is the highest compared to the second-stage abrasive belt 432 and the third-stage abrasive belt 433.

[0047] Furthermore, during the reverse movement of the differential polishing assembly towards the stepper motor 11, the variable-diameter arc-shaped slider 45 can be adjusted to align with... Figure 7 The radius distribution is opposite when moving towards the rotating push rod 12. At the same time, the thread polishing mechanism can polish the threaded part of the extruder screw 2 in the opposite direction by passing multiple pairs of polishing wheels 33 through the threaded part of the extruder screw 2 one by one. In this way, the surface of the extruder screw 2 can be polished quickly in a cyclical manner.

[0048] Working principle:

[0049] The present invention divides the polishing process of the extruder screw 2 into a thread polishing process and a screw polishing process. The thread polishing process is as follows: when polishing the threaded part of the extruder screw 2, the thread polishing ring 31 is slidably connected to the polishing sliding frame 3 through a connecting rod, which can limit the rotation angle of the thread polishing ring 31, making it similar to a thread rod driving a thread sleeve structure, pushing the strip polishing seat 32 to move along the screw axis direction, always in contact with the threaded part of the extruder screw 2, and by setting multiple pairs of polishing wheels 33 to polish the threaded part at the same time, the polishing speed of the threaded part of the extruder screw 2 can be accelerated and its polishing efficiency can be improved.

[0050] The screw polishing process is as follows: When polishing the screw part of the extruder screw 2, the variable diameter arc slider 45 located between two adjacent abrasive drive wheels 42 changes the distance between itself and the shaft center of the abrasive drive wheel 42, which can change the transmission radius of the corresponding multi-stage abrasive belt 43. According to the fact that the linear speed of the transmission belt is equal to the linear speed of the drive wheel, the linear speed of the transmission belt depends on the angular velocity and rotation radius of the drive wheel. Since the abrasive drive wheels 42 are driven by the same servo motor 421 output shaft and have the same angular velocity, when the variable diameter arc slider 45 changes the transmission radius of the multi-stage abrasive belt 43, the transmission speed of the abrasive belt can be changed. Thus, different polishing speeds of the screw part of the extruder screw 2 can be achieved through the same motor, achieving the effect of polishing the screw part step by step. This eliminates the need to repeat the process of different abrasive mesh and polishing speeds on the screw part multiple times, improving the polishing efficiency of the screw part of the extruder screw 2.

[0051] Based on the above, when the extruder screw 2 moves the mirror polishing unit to the rotating push rod 12 via the stepper motor 11, the multi-stage abrasive belt 43 on the abrasive drive wheel 42 can be replaced so that the abrasive belt that first contacts the extruder screw 2 has a higher mesh count than the original three-stage abrasive belt 433, and the subsequent abrasive belts are replaced step by step. That is, at this time, the mesh count of the first-stage abrasive belt 431 in the reverse movement process is the highest compared to the second-stage abrasive belt 432 and the third-stage abrasive belt 433.

[0052] Furthermore, during the reverse movement of the differential polishing assembly towards the stepper motor 11, the variable-diameter arc-shaped slider 45 can be adjusted to align with... Figure 7 The radius distribution is opposite when moving towards the rotating push rod 12. At the same time, the thread polishing mechanism can polish the threaded part of the extruder screw 2 in the opposite direction by passing multiple pairs of polishing wheels 33 through the threaded part of the extruder screw 2 one by one. In this way, the surface of the extruder screw 2 can be polished quickly in a cyclical manner.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A semi-automatic mirror polishing device for an extruder, comprising a polishing table (1) for polishing the extruder screw (2), characterized in that, The polishing table (1) is provided with a mirror polishing unit, which consists of a thread polishing mechanism and a screw polishing mechanism; The thread polishing mechanism includes a polishing sliding frame (3) set on a polishing table (1), the polishing sliding frame (3) is connected to a thread polishing ring (31) by a connecting rod, a strip polishing seat (32) is fixedly set on the thread polishing ring (31), and a pair of polishing wheels (33) are slidably set on the strip polishing seat (32) by a slider, and each pair of polishing wheels (33) is movably connected by an elastic contraction component. The screw polishing mechanism consists of a differential polishing assembly and a differential polishing drive assembly. The differential polishing assembly includes a screw polishing seat (4) set on a polishing table (1). A sanding stabilizer (41) is set on the screw polishing seat (4). A sanding drive wheel (42) is set on the sanding stabilizer (41). A servo motor (421) is set at one end of the sanding drive wheel (42). The sanding drive wheel (42) is connected to a driven wheel (44) of equal diameter through a multi-stage sanding belt (43).

2. The semi-automatic mirror polishing device for an extruder according to claim 1, characterized in that, One end of the extruder screw (2) is rotatably mounted on the polishing table (1) via a stepper motor (11), and the other end of the extruder screw (2) is provided with a rotating push rod (12) rotatably connected to the polishing table (1).

3. The semi-automatic mirror polishing device for an extruder according to claim 1, characterized in that, The inner wall of the strip polishing seat (32) is provided with a polishing groove, and the top of the polishing wheel (33) is provided with a rotating seat (331) fixed to the slider, and the rotating seat (331) is slidably connected to the strip polishing seat (32).

4. The semi-automatic mirror polishing device for an extruder according to claim 3, characterized in that, The elastic shrinking assembly includes an elastic shrinking rod (341) and a rotating sleeve (34) sleeved on the surface of each pair of polishing wheels (33). The elastic shrinking rod (341) is provided with a tension spring. The polishing wheel (33) shrinks through the tension spring and always fits against the threaded part of the extruder screw (2).

5. The semi-automatic mirror polishing device for an extruder according to claim 1, characterized in that, The spacing between each pair of polishing wheels (33) is determined by the pitch of adjacent threads of the extruder screw (2), and the outer surfaces of multiple pairs of polishing wheels (33) are provided with abrasive surfaces of the same mesh size.

6. The semi-automatic mirror polishing device for an extruder according to claim 1, characterized in that, The abrasive drive wheels (42) are arranged in pairs, and each pair of abrasive drive wheels (42) is radially slidably connected to a variable diameter arc-shaped slider (45) on the opposite side through a variable diameter groove. The multi-stage abrasive belt (43) is sleeved on the outer surface of the variable diameter arc-shaped slider (45).

7. The semi-automatic mirror polishing device for an extruder according to claim 1, characterized in that, The multi-stage abrasive belt (43) consists of a first-stage abrasive belt (431), a second-stage abrasive belt (432), and a third-stage abrasive belt (433) with successively increasing mesh sizes. The linear speed of the first-stage abrasive belt (431), the second-stage abrasive belt (432), and the third-stage abrasive belt (433) is driven by variable-diameter arc-shaped sliders (45) of different diameters, and gradually increases.

8. The semi-automatic mirror polishing device for an extruder according to claim 7, characterized in that, The differential polishing drive assembly includes a drive screw (51) disposed on the polishing table (1). One end of the drive screw (51) is rotatably connected to the polishing table (1) via a drive motor (5), and the drive screw (51) is threadedly connected to the inner wall of the screw polishing seat (4).

9. A semi-automatic mirror polishing device for an extruder according to claim 8, characterized in that, The screw polishing seat (4) is inclined and the inclination direction is adapted to the inclination direction of the adjacent thread on the upper surface of the extruder screw (2). The axis of the drive screw (51) is parallel to the axis of the extruder screw (2).

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