Internal rotation type abrasive flow processing equipment of plastic machine screw mixing element

Abstract

Internal rotation type abrasive flow machining equipment of a plastic machine screw mixing element comprises a base and a polishing mechanism arranged on the base and used for polishing, the polishing mechanism comprises a box body used for bearing abrasive and a shaft sleeve arranged in the box body, and a rotating shaft used for driving the shaft sleeve to rotate synchronously is arranged on the shaft sleeve. A plurality of polishing grooves used for driving grinding materials to flow are formed in the shaft sleeve, and a plurality of communicating grooves used for driving the grinding materials to flow are formed in the rotating shaft. Compared with the prior art, under the action of the polishing groove and the communicating groove, grinding materials act on the surface of the mixing element, then grinding and polishing of the mixing element are achieved, meanwhile, under the action of the moving assembly, the whole polishing mechanism is driven to move, and then the position of the mixing element in the box body is adjusted; therefore, the surface of the mixing element is completely ground and polished, the polishing precision and smoothness are improved, and the polishing effect of the mixing element is improved.

Description

Technical Field

[0001] This invention relates to the field of screw polishing technology, and more specifically to an internal vortex abrasive flow processing device for plastic machinery screw mixing components. Background Technology

[0002] As a core component of some mechanical equipment, the screw has been found to significantly affect the slip characteristics of viscoelastic materials when extruded through its helical surface, thanks to research. When the surface roughness is less than 0.8 μm after hardening treatment, not only is extrusion efficiency improved, but the screw's service life is also extended. Therefore, improving the screw's surface roughness and quality has become an important research topic in engineering machinery. Polishing is a commonly used processing method to improve the precision and smoothness of the screw surface, thereby enhancing its performance and lifespan. With increasingly complex manufacturing processes and the continuous application of new materials, conventional screw extruders have gradually revealed various problems, making it difficult to meet the processing requirements of new materials. While CNC milling technology for injection molding machine screws is highly mature, residual tool marks and burrs on the machined surface significantly affect surface quality. The surface finishing quality of the screw mixing elements directly impacts the mixing effect of the polymer melt, and mixing performance is crucial for injection molding machines. Traditional screw mixing elements, due to their numerous complex curved surface structures, are extremely difficult to polish, often requiring manual grinding, resulting in high processing costs, low efficiency, and poor processing uniformity.

[0003] To address the aforementioned issues, Chinese Patent Application No. 202411338779.8 discloses an abrasive flow polishing device for screw polishing. This device includes a base, an internal rotating polishing device mounted on and slidably connected to the base for abrasive flow polishing of the screw to be processed, a transmission device mounted on one side of the base and connected to the internal rotating polishing device for driving the internal rotating polishing device to move along the length of the base, and a positioning and clamping device mounted on the base at both ends of the internal rotating polishing device for fixing the screw to be processed. Chinese Patent Application No. 201420282125.3 discloses a screw polishing device. The disclosed screw polishing device includes a workable screw, abrasive, a sealed box, a fixed mold, a gap, and a screw drive device. One end of the workable screw is connected to the screw drive device, and the other end is immersed in the abrasive. The screw drive device is installed on the upper part of the sealed box. The fixed mold is installed inside the sealed box by a support rod. The abrasive is a viscoelastic abrasive, and the fixed mold is a tubular hollow mold.

[0004] In the aforementioned prior art, during screw polishing, the polishing device is moved by a transmission device, and the screw is polished in the polishing device. However, during the polishing of the screw, the screw surface cannot fully contact the abrasive, resulting in incomplete polishing of the screw surface and thus low polishing precision and smoothness. Summary of the Invention

[0005] The present invention aims to overcome the defects in the prior art and provide an internal vortex abrasive flow processing device for plastic machinery screw mixing elements that can achieve complete polishing and improve polishing accuracy and surface finish.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: an internal rotary abrasive flow processing device for a plastics machinery screw mixing element, comprising a base and a polishing mechanism disposed on the base for use. The polishing mechanism includes a housing for carrying abrasive and a bushing disposed in the housing. The bushing is provided with a rotating shaft for driving the bushing to rotate synchronously. The bushing has a plurality of polishing grooves for driving the abrasive flow, and the rotating shaft has a plurality of connecting grooves for driving the abrasive flow. The polishing mechanism is provided with a power component for driving the rotating shaft to rotate, and the base is also provided with a moving component for controlling the movement of the polishing mechanism.

[0007] As a preferred embodiment of the present invention, a polishing hole is formed in the bushing along the axial direction of the bushing, and a plurality of stirring grooves are formed on the wall of the polishing hole along the circumferential direction of the bushing, and the plurality of stirring grooves are arranged along the axial direction of the bushing.

[0008] As a preferred embodiment of the present invention, the plurality of polishing grooves are evenly distributed along the circumferential direction of the bushing, and the plurality of polishing grooves are connected to the polishing holes.

[0009] As a preferred embodiment of the present invention, the rotating shaft has a sleeve hole arranged along the axial direction of the rotating shaft, and the bushing is disposed in the sleeve hole.

[0010] As a preferred embodiment of the present invention, the plurality of the connecting grooves are evenly distributed along the circumferential direction of the rotating shaft, and the plurality of connecting grooves are connected to the plurality of polishing grooves.

[0011] As a preferred embodiment of the present invention, a polishing space is formed in the housing, and the bushing and the rotating shaft are both disposed in the polishing space. Mounting holes communicating with the polishing space are formed at both ends of the housing, and both ends of the rotating shaft and the bushing are connected to the mounting holes.

[0012] As a preferred embodiment of the present invention, the top of the housing is provided with a feed inlet that communicates with the polishing space.

[0013] As a preferred embodiment of the present invention, the power assembly includes a power motor and a pulley disposed at the output end of the power motor. A belt that drives the rotating shaft to rotate is connected to the pulley, and the end of the rotating shaft is provided with a belt groove that connects to the belt.

[0014] As a preferred embodiment of the present invention, the base is provided with a slide rail arranged along the length of the base, a slider is slidably connected on the slide rail, and the housing is disposed on the slider.

[0015] As a preferred embodiment of the present invention, the moving component includes a moving motor and a lead screw connected to the output end of the moving motor, the lead screw being threadedly connected to the bottom of the housing.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting the bushing in the housing, the rotating shaft drives the bushing to rotate. The mixing element of the screw is set in the bushing. The bushing is provided with several polishing grooves, and the rotating shaft is provided with several connecting grooves that communicate with the polishing grooves. The power component drives the rotating shaft and the bushing to rotate synchronously. The abrasive in the housing is continuously turned over by the rotation of the rotating shaft and the bushing. Under the action of the polishing grooves and connecting grooves, the abrasive acts on the surface of the mixing element, thereby achieving grinding and polishing of the mixing element. At the same time, the moving component drives the entire polishing mechanism to move, thereby adjusting the position of the mixing element in the housing, thus ensuring that the surface of the mixing element is completely ground and polished, improving the polishing accuracy and smoothness, and thus improving the polishing effect of the mixing element. 2. Furthermore, by having several connecting grooves on the rotating shaft cooperate with several polishing grooves on the bushing, the abrasive is continuously stirred, preventing the abrasive from adhering to the inner wall of the polishing hole of the bushing under the action of centrifugal force, thus improving the polishing effect of the abrasive on the surface of the mixing element and avoiding incomplete polishing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the connection between the bushing and the rotating shaft of the present invention; Figure 3 This is a schematic diagram of the structure of the rotating shaft of the present invention; Figure 4 This is a schematic diagram of the bushing structure; Figure 5 This is a schematic diagram of the screw structure. Reference numerals: Base 1, slide rail 101, slider 102, polishing mechanism 2, housing 201, feed inlet 2011, polishing space 2012, mounting hole 2013, bushing 202, polishing groove 2021, polishing hole 2022, stirring groove 2023, rotating shaft 203, connecting groove 2031, belt groove 2032, socket hole 2033, sealing ring 204, bearing 205, power component 3, power motor 301, motor base 3011, pulley 302, belt 303, moving component 4, moving motor 401, lead screw 402, screw 5, mixing element 501. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0019] like Figures 1-5 As shown, an internally rotating abrasive flow processing device for a plastics screw mixing element includes a base 1 and a polishing mechanism 2 disposed on the base 1. The polishing mechanism 2 includes a housing 201 for carrying abrasive and a bushing 202 disposed in the housing 201. The bushing 202 is provided with a rotating shaft 203 for driving the bushing 202 to rotate synchronously. The bushing 202 has a plurality of polishing grooves 2021 for driving the abrasive flow, and the rotating shaft 203 has a plurality of connecting grooves 2031 for driving the abrasive flow. The polishing mechanism 2 is provided with a power component 3 for driving the rotating shaft 203 to rotate, and the base 1 is also provided with a moving component 4 for controlling the movement of the polishing mechanism 2.

[0020] Furthermore, the mixing element 501 is disposed at the end of the screw 5 and is housed in the housing 201. Specifically, the mixing element 501 is located in the bushing 202. The screw 5 remains stationary, and the power assembly 3 drives the rotating shaft 203 and the bushing 202 to rotate synchronously. The abrasive material in the housing 201 is tumbled by the rotation of the rotating shaft 203 and the bushing 202, thereby achieving grinding and polishing of the mixing element 501. In addition, several polishing grooves 2021 are provided on the bushing 202. The 3 is provided with several connecting grooves 2031. Under the action of the polishing groove 2021 and the connecting grooves 2031, the abrasive acts on the surface of the mixing element 501, thereby achieving grinding and polishing of the mixing element 501. At the same time, under the action of the moving component 4, the entire polishing mechanism 2 is moved, thereby adjusting the position of the mixing element 501 in the box 201, thus ensuring that the surface of the mixing element 501 is completely ground and polished, improving the polishing accuracy and smoothness, and thus improving the polishing effect of the mixing element 501.

[0021] A polishing hole 2022 is formed in the bushing 202 along the axial direction of the bushing 202. A plurality of stirring grooves 2023 are formed on the wall of the polishing hole 2022, evenly distributed along the circumferential direction of the bushing 202. The stirring grooves 2023 are arranged along the axial direction of the bushing 202. Furthermore, the polishing hole 2022 extends through the entire bushing 202. A mixing element 501 is disposed in the polishing hole 2022. Simultaneously, a plurality of stirring grooves 2023 are provided on the wall of the polishing hole 2022, extending along the axial direction of the bushing 202. The bushing 202 is set along its length, and several stirring tanks 2023 are evenly arranged along the circumferential direction of the bushing 202. During the rotation of the bushing 202, the abrasive adheres to the wall of the polishing hole 2022 under the action of centrifugal force. Under the action of the stirring tanks 2023, the abrasive can be turned over during the rotation of the bushing 202, thereby preventing the abrasive from adhering to the wall of the polishing hole 2022, improving the fluidity of the abrasive, and thus enabling the abrasive to act on the surface of the mixing element 501, thereby improving the polishing effect.

[0022] Several polishing grooves 2021 are evenly distributed along the circumferential direction of the bushing 202, and the several polishing grooves 2021 are connected to the polishing holes 2022. Furthermore, the several polishing grooves 2021 are arranged along the axial direction of the bushing 202, and the several polishing grooves 2021 are evenly distributed on the circumference of the bushing 202. During the rotation of the bushing 202, the abrasive is driven to tumble. Under the action of the several polishing grooves 2021, the degree of tumbling of the abrasive is increased, the fluidity of the abrasive is increased, and thus the polishing effect of the abrasive on the mixing element 501 is improved.

[0023] A sleeve hole 2033 is formed in the rotating shaft 203 along the axial direction of the rotating shaft 203. The bushing 202 is disposed in the sleeve hole 2033. Furthermore, the inner diameter of the sleeve hole 2033 is adapted to the outer diameter of the bushing 202. The bushing 202 is disposed in the sleeve hole 2033 and is connected and fixed to the rotating shaft 203 by a screw. The rotating shaft 203 drives the bushing 202 to rotate synchronously.

[0024] A number of connecting grooves 2031 are evenly distributed along the circumferential direction of the rotating shaft 203, and the connecting grooves 2031 are connected to a number of polishing grooves 2021. Furthermore, the connecting grooves 2031 are arranged along the axial direction of the rotating shaft 203, and the connecting grooves 2031 are evenly distributed on the circumference of the rotating shaft 203. At the same time, the connecting grooves 2031 are connected to the polishing grooves 2021. During the synchronous rotation of the rotating shaft 203 and the bushing 202, the abrasive is driven to tumble. Under the combined action of the connecting grooves 2031 and the polishing grooves 2021, the degree of tumbling of the abrasive is increased, the fluidity of the abrasive is increased, and thus the grinding and polishing effect of the abrasive on the mixing element 501 is improved.

[0025] A polishing space 2012 is formed in the housing 201. The bushing 202 and the rotating shaft 203 are both disposed in the polishing space 2012. Mounting holes 2013 communicating with the polishing space 2012 are formed at both ends of the housing 201. Both ends of the rotating shaft 203 and the bushing 202 are connected to the mounting holes 2013. Furthermore, a hollow structure is formed in the housing 201, which forms the polishing space 2012 for grinding and polishing the mixing element 501. The mounting holes 2013 are located at both ends of the housing 201. On the surface, the mounting hole 2013 is located in the middle of the end face of the housing 201. Both ends of the rotating shaft 203 and the bushing 202 are rotatably set in the mounting hole 2013. In addition, bearings 205 are sleeved on both ends of the rotating shaft 203. The outer ring of the bearing 205 is fixedly set in the mounting hole 2013. A sealing ring 204 is also provided between the bearing 205 and the rotating shaft 203. The sealing ring 204 abuts against the hole wall of the mounting hole 2013, and the sealing between the mounting hole 2013 and the rotating shaft 203 is achieved by the sealing ring 204.

[0026] The top of the housing 201 is provided with a feed port 2011 that communicates with the polishing space 2012. Furthermore, the feed port 2011 is connected to the polishing space 2012. Abrasive is added into the polishing space 2012 through the feed port 2011. At the same time, the feed port 2011 is also connected to the connecting groove 2031 and the polishing groove 2021. After entering the polishing space 2012, the abrasive then enters the connecting groove 2031 and the polishing groove 2021, and then enters the polishing hole 2022, thereby achieving the polishing of the mixing element 501.

[0027] The power assembly 3 includes a power motor 301 and a pulley 302 located at the output end of the power motor. A belt 303 that drives the rotating shaft 203 to rotate is connected to the pulley 302. The end of the rotating shaft 203 is provided with a belt groove 2032 that connects to the belt 303. Furthermore, a motor base 3011 is provided on the top of the housing 201, and the power motor 301 is fixed on the motor base 3011. A belt hole 3012 for the belt 303 to pass through is formed on the motor base 3011. 303 passes through the belt hole 3012 and is connected to the belt groove 2032 of the rotating shaft 203. The belt groove 2032 is located at the end of the rotating shaft 203, and one end of the belt groove 2032 of the rotating shaft 203 extends out of the mounting hole 2013. The power motor 301 drives the pulley 302 and the belt 303 to rotate synchronously, thereby driving the rotating shaft 203 and the bushing 202 to rotate synchronously. At the same time, the abrasive is turned over in the polishing space 2012, realizing the grinding and polishing of the mixing element 501.

[0028] The base 1 is provided with a slide rail 101 arranged along the length of the base 1. A slider 102 is slidably connected to the slide rail 101. The housing 201 is arranged on the slider 102. Furthermore, there are two slide rails 101, and the two slide rails 101 are located on both sides of the base 1. The two slide rails 101 are arranged along the axial direction of the screw 5. The slider 102 is slidably connected to the slide rail 101. The housing 201 is fixedly arranged on the slider 102. The housing 201 slides on the slide rail 101 through the slider 102.

[0029] The moving component 4 includes a moving motor 401 and a lead screw 402 connected to the output end of the moving motor 401. The lead screw 402 is threaded to the bottom of the housing 201. Furthermore, the moving motor 401 is located at the end of the base 1, and the lead screw 402 is connected to the output end of the moving motor 401. Both ends of the lead screw 402 are rotatably connected to the base 1. The lead screw 402 passes through the bottom end of the housing 201 and is threaded to the housing 201. The moving motor 401 drives the lead screw 402 to rotate, thereby causing the housing 201 to slide on the slide rail 101. The moving motor 401 drives the housing 201 to reciprocate along the axial direction of the screw 5, thereby adjusting the position of the mixing element 501 in the housing 201. This achieves grinding and polishing of different positions of the mixing element 501, improving the polishing efficiency of the mixing element 501.

[0030] Specific working principle: Before processing, the mixing element 501 of the screw 5 is inserted into the polishing hole 2022 of the bushing 202. Fluid abrasive is added through the feed port 2011 so that the abrasive completely covers the mixing element 501 of the screw 5. Then, the power motor 301 is started, and the belt 303 on the pulley 302 drives the rotating shaft 203 and the bushing 202 to rotate synchronously at high speed. At the same time, the moving motor 401 moves the housing 201 back and forth along the axial direction of the screw 5. By controlling the speed of the power motor 301 and the moving motor 401, the mixing element 501 of the screw 5 is polished by abrasive flow at different angles.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0032] Although this document frequently uses reference numerals from the figures, such as base 1, slide rail 101, slider 102, polishing mechanism 2, housing 201, feed inlet 2011, polishing space 2012, mounting hole 2013, bushing 202, polishing groove 2021, polishing hole 2022, stirring tank 2023, rotating shaft 203, connecting groove 2031, belt groove 2032, socket hole 2033, sealing ring 204, bearing 205, power assembly 3, power motor 301, motor base 3011, pulley 302, belt 303, moving assembly 4, moving motor 401, lead screw 402, screw 5, and mixing element 501, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. An internally rotating abrasive flow processing device for a plastic machine screw mixing element, characterized in that: The invention comprises a base (1) and a polishing mechanism (2) arranged on the base (1) for use in alignment, wherein the polishing mechanism (2) comprises a box (201) for carrying abrasives and a shaft sleeve (202) arranged in the box (201), a rotating shaft (203) for driving the shaft sleeve (202) to rotate synchronously is provided on the shaft sleeve (202), a plurality of polishing grooves (2021) for driving the flow of abrasives is formed on the shaft sleeve (202), and a plurality of connecting grooves (2031) for driving the flow of abrasives is formed on the rotating shaft (203); the polishing mechanism (2) is provided with a power component (3) for driving the rotating shaft (203) to rotate, and the base (1) is also provided with a moving component (4) for controlling the movement of the polishing mechanism (2).

2. The internal rotating abrasive flow processing equipment of a plastic machine screw mixing element according to claim 1, characterized in that: The shaft sleeve (202) is formed with a polishing hole (2022) arranged along the axial direction of the shaft sleeve (202), and a plurality of stirring grooves (2023) evenly distributed along the circumferential direction of the shaft sleeve (202) are formed on the hole wall of the polishing hole (2022), and the plurality of stirring grooves (2023) are arranged along the axial direction of the shaft sleeve (202).

3. The internal rotating abrasive flow processing equipment of a plastic machine screw mixing element according to claim 2, characterized in that: The plurality of polishing grooves (2021) are evenly distributed along the circumferential direction of the shaft sleeve (202), and the plurality of polishing grooves (2021) are connected to the polishing holes (2022).

4. The internal rotating abrasive flow processing equipment of a plastic machine screw mixing element according to claim 1, characterized in that: The rotating shaft (203) is formed with a sleeve hole (2033) arranged along the axial direction of the rotating shaft (203), and the shaft sleeve (202) is arranged in the sleeve hole (2033).

5. The internal rotating abrasive flow processing equipment of a plastic machine screw mixing element according to claim 1, characterized in that: The plurality of connecting grooves (2031) are evenly distributed along the circumferential direction of the rotating shaft (203), and the plurality of connecting grooves (2031) are connected to the plurality of polishing grooves (2021).

6. The internal rotating abrasive flow processing equipment of a plastic machine screw mixing element according to claim 1, characterized in that: A polishing space (2012) is formed in the housing (201), the shaft sleeve (202) and the rotating shaft (203) are both arranged in the polishing space (2012), mounting holes (2013) connected to the polishing space (2012) are formed at both ends of the housing (201), and both ends of the rotating shaft (203) and the shaft sleeve (202) are connected to the mounting holes (2013).

7. The internal rotating abrasive flow processing equipment of a plastic machine screw mixing element according to claim 6, characterized in that: The top of the box body (201) is provided with a feed port (2011) which is connected to the polishing space (2012).

8. The internal-rotation abrasive flow processing equipment of a screw mixing element of a plastic machine according to claim 1, characterized in that: The power assembly (3) comprises a power motor (301) and a pulley (302) arranged at the output end of the power motor, the pulley (302) is connected to a belt (303) for driving the rotating shaft (203) to rotate, and the end of the rotating shaft (203) is provided with a belt groove (2032) connected to the belt (303).

9. The internal rotating abrasive flow processing equipment of a plastic machine screw mixing element according to claim 1, characterized in that: The base (1) is provided with a slide rail (101) arranged along the length direction of the base (1), a slider (102) is slidably connected to the slide rail (101), and the box (201) is arranged on the slider (102).

10. The internal rotating abrasive flow processing equipment of a plastic machine screw mixing element according to claim 1, characterized in that: The moving assembly (4) comprises a moving motor (401) and a screw rod (402) connected to the output end of the moving motor (401), and the screw rod (402) is threadedly connected to the bottom of the box body (201).

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