High borosilicate microsyringe inner hole polishing device based on walnut skin powder as polishing medium

Abstract

The invention discloses a high borosilicate microsyringe inner hole polishing device based on walnut skin powder as a polishing medium, and relates to the technical field of syringe machining. The injector is kept in a fixed posture and is in stable contact with the powder supply plate through a magnetic attraction sliding coaxial positioning structure, and powder is controlled to fall into a workpiece through a coaxial leakage hole in a trace and directional manner by utilizing local shaking of a top vibration plate and synchronous rotation of an execution rotating rod; the brush head is centrifugally unfolded at different diameter sections to drive mixed powder composed of diamond powder and walnut skin powder to rotate to form stable centrifugal positive pressure to extrude the inner wall to finish polishing, and meanwhile, an orifice conical guide rubber sleeve realizes cooperative control of powder splash prevention and funnel powder guide; and a medium recycling and backfilling closed loop is constructed by the recycling screw rod and the inclined gravity chute.

Description

Technical Field

[0001] This invention relates to the field of syringe processing technology, specifically to a high borosilicate micro-syringe inner hole polishing device based on walnut shell powder as a polishing medium. Background Technology

[0002] Existing high borosilicate micro-injector internal hole polishing technologies mostly employ an integral vibratory grinding cylinder or a hard abrasive blasting chamber tumbling processing mode. The polishing media are typically ceramic sand, alumina, or single diamond powder. The workpiece is freely tumbling or randomly placed horizontally in the grinding chamber, and the abrasive relies on the overall vibration of the chamber, airflow, or mutual collision and friction between workpieces to complete the surface treatment. This type of technology has significant shortcomings when polishing the slender internal holes and Luer head variable diameter channel structures of injectors: the workpiece lacks a coaxial constraint positioning structure, and its posture is prone to wobble or flipping during processing, resulting in random and discontinuous contact force between the Luer section and the piston hole section, making it impossible to establish a stable positive pressure on the inner hole wall, resulting in poor polishing consistency, large fluctuations in the micro-roughness of the hole wall, and low batch quality reliability; the friction medium system lacks low-resistance lubrication and powder, and the single hard abrasive will generate high temperature due to high frictional resistance when rotating in the narrow channel; the injector Luer joint and the polished section of the tube have obvious differences in inner diameter and gradual diameter change characteristics, and traditional fixed-diameter rigid abrasives or blasting methods cannot adapt to the dynamic changes in hole diameter. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides the following technical solution: a high borosilicate micro-injector inner hole polishing device based on walnut shell powder as a polishing medium, comprising a top vibrating plate, a bottom fixing plate, an elastic pad, and a mounting support plate supporting the elastic pad, wherein the elastic pad is fixed on the mounting support plate, and both the elastic pad and the mounting support plate have multiple through holes for inserting the syringe, and the through holes on the mounting support plate and the elastic pad are aligned one-to-one; wherein the top vibrating plate is positioned above the bottom fixing plate, and both the bottom fixing plate and the top vibrating plate are fixed to the inner wall of the grinding tank; it should be noted that a vibration unit is provided inside the top vibrating plate or on the lower surface of the top vibrating plate to increase the internal vibration of the grinding tank. The flowability of walnut shell powder and diamond powder is achieved through a mechanism where a top vibrating plate is fixed to the inner wall of the powdering tank via a sealing vibrating rubber ring, enabling the top vibrating plate to vibrate within the tank. Multiple feed holes are provided on the bottom fixed plate, and multiple discharge holes are coaxially aligned with all feed holes on the top vibrating plate. A conical guide rubber sleeve is elastically connected between each discharge hole and feed hole, with the diameter of the conical guide rubber sleeve at the discharge hole end being larger than that at the feed hole end. The system also includes multiple actuator rods, coaxially passing through the discharge holes and feed holes, with the bottom end of each actuator rod extending into a syringe. A brush head is fixed to the bottom end of each actuator rod, and a gap is maintained between the inner wall of the discharge hole and the actuator rod.

[0004] Preferably, three sliding sleeve blocks are fixedly installed on the circumferential edge of the mounting support plate, and each sliding sleeve block is fixed with a magnetic fixing block; wherein a magnetic support ring is fixedly installed on the circumferential surface of the collection tank, and the magnetic support ring is suspended and fixed above the collection tank by three support rods.

[0005] Preferably, the three sliding sleeves are slidably mounted on the three support rods, wherein the magnetic fixing block that is fixedly engaged with the sliding sleeves is magnetically engaged with the magnetic support ring.

[0006] Preferably, all the actuators are fixedly mounted on the output shafts of the corresponding drive motors, all the drive motors are fixedly mounted on the drive motor mounting plate, the drive motor mounting plate is fixedly mounted on the lifting star frame, the lifting star frame is driven by the lifting electric cylinder; the lifting star frame is fixedly mounted on the lifting crossbeam, the two ends of the lifting crossbeam are fixedly mounted on the ends of the telescopic rods of the two lifting electric cylinders, the two lifting electric cylinders are fixedly mounted on the circumferential surface of the pool, and the telescopic rods of the two lifting electric cylinders move synchronously.

[0007] Preferably, a sliding guide groove is fixedly installed on the top edge of the sink via a conical connecting sleeve, and the sliding guide groove is inclined.

[0008] Preferably, the bottom of the collection pool is fixedly connected to a recycling channel via an inclined guide pool, and the top of the recycling channel is fixedly connected to a sliding guide trough. The height of the end of the sliding guide trough connected to the recycling channel is higher than the height of the end connected to the conical connecting sleeve; the height of the end of the guide pool connected to the collection pool is higher than the height of the end connected to the recycling channel.

[0009] Preferably, a recovery screw is rotatably installed within the recovery channel, driven by a recovery motor fixedly installed at the bottom of the recovery channel, with the top end of the recovery screw extending above the sliding guide groove. The collection pool and recovery channel are fixedly installed on the base.

[0010] Compared with the prior art, the present invention has the following advantages: (1) The present invention uses magnetic sliding sleeve block and support rod to guide and position, so that the syringe workpiece is kept in a fixed posture and in stable coaxial contact with the powder supply plate, forming a positive pressure contact relationship between the Luer joint section and the piston section under continuous force, avoiding the defects of random workpiece posture, discontinuous contact force, and inability to establish stable positive pressure in the inner hole under the traditional grinding chamber tumbling mode, thereby improving the consistency, reliability and processing accuracy of polishing slender inner holes, and realizing true coaxial constraint of directional powder supply and polishing operation; (2) The present invention uses mixed polishing medium in Walnut shell powder is introduced as a lubricating component, so that diamond powder forms a rotating flow state with lower frictional resistance under the drive of the brush head, thereby reducing the frictional resistance of the powder to the inner wall during the polishing process; (3) The brush head of the present invention expands centrifugally into a fan-shaped profile, automatically expanding the contact profile when the diameter of the syringe inner hole changes, so that the mixed powder can form a stable centrifugal positive pressure extrusion polishing in different diameter sections, solving the defects of traditional fixed diameter abrasives or rigid sandblasting that cannot adapt to the diameter change of the Luer joint to the tube polishing section and cannot achieve uniform positive pressure polishing in different hole diameter sections, and realizing continuous progressive polishing of the micro-hole variable diameter section. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0012] Figure 2 This is a schematic diagram of the structure of the collection pool in this invention.

[0013] Figure 3 This is a schematic diagram of the internal structure of the end-of-life tank of the present invention.

[0014] Figure 4 This is a diagram showing the installation position of the conical guide rubber sleeve of the present invention.

[0015] Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle.

[0016] Figure 6 This is a schematic diagram of the brush head structure of the present invention.

[0017] Figure 7 This is a diagram showing the fan-shaped unfolded state of the brush head of the present invention.

[0018] In the diagram: 101-Collection pool; 102-Guide pool; 103-Recovery motor; 104-Recovery channel; 105-Recovery screw; 106-Sliding guide groove; 107-Lifting star frame; 108-Drive motor; 109-Drive motor mounting plate; 110-Conical connecting sleeve; 111-Lifting crossbeam; 112-Lifting electric cylinder; 113-Base; 114-Sinking pool; 115-Magnetic support ring; 116-Support rod; 117-Magnetic fixing block; 118-Mounting support plate; 119-Elastic rubber pad; 120-Bottom fixing plate; 121-Conical guide rubber sleeve; 122-Top vibrating plate; 123-Leakage hole; 124-Infeed hole; 125-Injector; 126-Actuating rod; 127-Sealing vibrating rubber ring; 128-Brush head; 129-Sliding sleeve block. Detailed Implementation

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Reference Figures 1-7As shown, this invention provides a high borosilicate micro-injector inner hole polishing device based on walnut shell powder as a polishing medium. It includes a top vibrating plate 122, a bottom fixing plate 120, an elastic pad 119, and a mounting support plate 118 supporting the elastic pad 119. The elastic pad 119 is fixed to the mounting support plate 118. Both the elastic pad 119 and the mounting support plate 118 have multiple through holes for inserting the syringe 125, and these through holes are aligned. The top vibrating plate 122 is positioned above the bottom fixing plate 120, and both are fixed to the inner wall of a powder collection tank 114. It should be noted that a vibration unit is provided inside the top vibrating plate 122 or on its lower surface to increase the flowability of the walnut shell powder and diamond powder inside the powder collection tank 114. The top vibrating plate 122 is fixed to the inner wall of the slurry tank 114 by a sealing vibrating rubber ring 127, allowing the top vibrating plate 122 to vibrate within the slurry tank 114. The bottom fixed plate 120 has multiple feed holes 124, and the top vibrating plate 122 has multiple discharge holes 123 coaxially aligned with all the feed holes 124. A conical guide rubber sleeve 121 is elastically connected between each discharge hole 123 and each feed hole 124. The diameter of the guide rubber sleeve 121 at one end of the discharge hole 123 is larger than the diameter at one end of the feed hole 124. It also includes multiple actuator rods 126, which are coaxially arranged inside the discharge hole 123 and the feed hole 124, with the bottom end of each actuator rod 126 extending into the syringe 125. A brush head 128 is fixed to the bottom end of each actuator rod 126, and a gap is left between the inner wall of the discharge hole 123 and the actuator rod 126. Three sliding sleeve blocks 129 are fixedly installed on the circumferential edge of the mounting support plate 118, and each sliding sleeve block 129 is fixed with a magnetic fixing block 117. A magnetic support ring 115 is fixedly installed on the circumferential surface of the collection tank 114, and the magnetic support ring 115 is suspended and fixed above the collection tank 101 by three support rods 116. Three sliding sleeves 129 are respectively slidably sleeved on three support rods 116, wherein the magnetic fixing block 117, which is fixedly engaged with the sliding sleeve 129, is magnetically engaged with the magnetic support ring 115.

[0021] All actuators 126 are fixedly mounted on the output shafts of their respective drive motors 108. All drive motors 108 are fixedly mounted on drive motor mounting plates 109, which are in turn fixedly mounted on lifting star-shaped frames 107. The lifting star-shaped frames 107 are driven by lifting electric cylinders 112. The lifting star-shaped frames 107 are fixedly mounted on lifting crossbeams 111, and both ends of the lifting crossbeams 111 are fixedly mounted on the ends of the telescopic rods of two lifting electric cylinders 112. The two lifting electric cylinders 112 are fixedly mounted on the circumferential surface of the waste collection tank 114, and their telescopic rods move synchronously. A sliding guide groove 106 is fixedly mounted on the top edge of the waste collection tank 114 via a tapered connecting sleeve 110. The sliding guide groove 106 is inclined. The bottom of the collection pool 101 is fixedly connected to a recycling channel 104 via an inclined guide pool 102. The top of the recycling channel 104 is fixedly connected to a sliding guide groove 106, wherein the height of the end of the sliding guide groove 106 connected to the recycling channel 104 is higher than the height of the end connected to the conical connecting sleeve 110; the height of the end of the guide pool 102 connected to the collection pool 101 is higher than the height of the end connected to the recycling channel 104. A recycling screw 105 is rotatably installed inside the recycling channel 104, driven by a recycling motor 103 fixedly installed at the bottom of the recycling channel 104, and the top of the recycling screw 105 extends above the sliding guide groove 106. The collection pool 101 and the recycling channel 104 are fixedly installed on a base 113.

[0022] Walnut shell powder is mixed with diamond powder, which acts as a lubricant. The diamond powder and walnut shell powder are combined to form a mixed powder, which is then poured into collection tank 101 and storage tank 114. In use, the syringe 125 is first installed on the mounting support plate 118 and the elastic pad 119. Specifically, the syringe 125 is inserted into the corresponding through holes of the mounting support plate 118 and the elastic pad 119. The finger rest at the top of the syringe 125 will hook onto the upper surface of the elastic pad 119, preventing the syringe 125 from completely passing through the elastic pad 119. Thus, the syringe 125... 5 is installed on the elastic pad 119. Finally, the mounting support plate 118 is pushed to slide on the support rod 116, so that the elastic pad 119 moves towards the bottom fixing plate 120. When the finger support of the syringe 125 on the elastic pad 119 contacts the lower surface of the bottom fixing plate 120, the magnetic fixing block 117 is magnetically attracted to the magnetic support ring 115. In this way, the mounting support plate 118 is fixed on the magnetic support ring 115, ensuring that the syringe 125 is always in contact with the bottom fixing plate 120. Then, the telescopic rod of the lifting cylinder 112 is controlled to retract. The lifting cylinder 112 directly drives the lifting star frame 107, drive motor 108 and drive motor mounting plate 109 connected to it to move synchronously through the lifting crossbeam 111. Finally, the actuator rod 126 on the output shaft of all drive motors 108 is inserted into the syringe 125, and finally the bottom end of the brush head 128 passes through the Luer connector of the syringe 125.

[0023] Before use, the vibration unit on the top vibrating plate 122 needs to be activated to make the top vibrating plate 122 vibrate. At the same time, the drive motor 108 is activated, which drives the actuator rod 126 to rotate. The rotation of the actuator rod 126, combined with the vibration of the top vibrating plate 122, allows the mixed powder inside the powder tank 114 to pass smoothly through the discharge hole 123, and finally through the conical guide rubber sleeve 121 and the feed hole 124 into the syringe 125. It should be noted that when the vibration unit and drive motor 108 are not activated, all parts are in a static state, and the mixed powder will not pass smoothly through the gap between the discharge hole 123 and the actuator rod 126 due to the lack of vibration. The rotation of the actuator rod 126 will drive the brush head 128 to rotate. The rotation of the brush head 128 will cause it to fan out in a centrifugal force (e.g., Figure 6As shown), initially, the brush head 128 will slide into contact with the bottom edge of the Luer connector of the syringe 125. At this time, the mixed powder falling into the syringe 125 from above will accumulate in the syringe 125 and its Luer connector due to the obstruction of the brush head 128 (the powder falls little by little, not instantly filling the syringe 125). Some of the mixed powder will flow out of the syringe 125 through the gap of the brush head 128. The mixed powder inside the syringe 125 and its Luer connector will rotate under the action of the brush head 128. The rotating mixed powder will be subjected to centrifugal force and squeeze the inner wall of the syringe 125 and its Luer connector. This creates a positive pressure of diamond powder grinding and rubbing against the inner wall of the syringe 125 (the polishing time is determined according to the specific process requirements).

[0024] After the Luer connector of syringe 125 is machined, the control lifting cylinder 112 is used to lift the brush head 128 into the piston movement section (tube) inside syringe 125. Due to the increased internal diameter, the fan-shaped profile of the brush head 128 also increases, thus blocking the mixed powder falling from above (some mixed powder will pass through the gap after the brush head 128 unfolds and eventually flow out of syringe 125, while mixed powder will continuously enter syringe 125 from above to replenish it, so there will always be mixed powder rotating above the brush head 128 inside syringe 125). The principle is the same as that for machining the Luer connector. The brush head 128 drives the mixed powder to rotate inside syringe 125. The rotating mixed powder is subjected to centrifugal force and squeezes the inner wall of syringe 125, thereby polishing the inner wall of syringe 125. It is necessary to pull the actuator rod 126 upward while polishing, so that the inner wall of syringe 125 can fully contact the mixed powder accumulated on brush head 128. When the brush head 128 moves to the top of the syringe 125, part of the brush head 128 will move to the outside of the syringe 125. In order to prevent the mixed powder from splashing due to centrifugal force, a conical guide rubber sleeve 121 is provided. The conical guide rubber sleeve 121 is used to shield the mixed powder that is rotated by the brush head 128, and at the same time acts as a funnel (the diameter of the feed hole 124 is the same as the inner diameter of the syringe 125).

[0025] The mixed powder flowing from the Luer connector of syringe 125 will eventually be collected in collection pool 101, and then conveyed to the bottom of recovery channel 104 through guide pool 102. Then, recovery motor 103 is started, and recovery screw 105 is rotated. Recovery screw 105 conveys the collected mixed powder to sliding guide trough 106, and then slides back into the powder collection pool 114 through sliding guide trough 106. After all syringes 125 have been processed, drive motor 108, recovery motor 103 and vibration unit are stopped. Finally, pull down magnetic fixing block 117 to move elastic pad 119 away from bottom fixing plate 120. Finally, remove elastic pad 119 and syringes 125 from mounting support plate 118.

Claims

1. A high borosilicate microsyringe inner hole polishing device based on walnut husk powder as polishing medium, characterized by: It includes top vibration plate (122), bottom fixed plate (120), elastic rubber pad (119) and mounting support disc (118) supporting elastic rubber pad (119), wherein elastic rubber pad (119) and mounting support disc (118) are provided with a plurality of through holes allowing syringes (125) to be inserted; wherein the top vibration plate (122) is arranged above the bottom fixed plate (120), and the bottom fixed plate (120) and the top vibration plate (122) are both fixed on the inner wall of the pool (114); A plurality of feeding holes (124) are arranged on the bottom fixed plate (120), and a plurality of material leakage holes (123) coaxially aligned with all the feeding holes (124) are arranged on the top vibration plate (122), and a conical guide rubber sleeve (121) is elastically connected between each material leakage hole (123) and the feeding hole (124); It also includes a plurality of execution rotating rods (126), the execution rotating rods (126) are coaxially arranged inside the material leakage hole (123) and the feeding hole (124), and the bottom end of the execution rotating rod (126) can extend into the syringe (125), wherein the bottom end of the execution rotating rod (126) is fixed with a brush head (128), and a gap is left between the inner wall of the material leakage hole (123) and the execution rotating rod (126).

2. A high borosilicate microsyringe inner hole polishing device based on walnut shell powder as polishing medium according to claim 1, characterized in that: Three sliding sleeve blocks (129) are fixedly installed on the circumferential edge of the mounting support disc (118), and each sliding sleeve block (129) is fixedly provided with a magnetic attraction fixing block (117); wherein the circumferential surface of the pool (114) is fixedly provided with a magnetic attraction support ring (115), and the magnetic attraction support ring (115) is fixedly arranged above the collection pool (101) by three support rods (116).

3. A high borosilicate microsyringe inner hole polishing device based on walnut shell powder as polishing medium according to claim 2, characterized in that: The three sliding sleeve blocks (129) are respectively slidably arranged on the three support rods (116), wherein the magnetic attraction fixing block (117) fixedly matched with the sliding sleeve block (129) is magnetically matched with the magnetic attraction support ring (115).

4. A high borosilicate microsyringe inner hole polishing device based on walnut shell powder as polishing medium according to claim 3, characterized in that: All the execution rotating rods (126) are fixedly installed on the output shaft of the corresponding driving motor (108), all the driving motors (108) are fixedly installed on the driving motor mounting plate (109), the driving motor mounting plate (109) is fixedly installed on the lifting star-shaped frame (107), and the lifting star-shaped frame (107) is driven by the lifting cylinder (112).

5. A high borosilicate microsyringe inner hole polishing device based on walnut shell powder as polishing medium according to claim 4, characterized in that: The top edge of the pool (114) is fixedly provided with a sliding guide groove (106) through a conical connecting sleeve (110), and the sliding guide groove (106) is arranged obliquely.

6. A high borosilicate microsyringe inner hole polishing device based on walnut shell powder as polishing medium according to claim 5, characterized in that: The bottom of the collection pool (101) is fixedly connected with a recycling channel (104) through an inclined material guide pool (102), and the top end of the recycling channel (104) is fixedly connected with the sliding guide groove (106).

7. A high borosilicate microsyringe inner hole polishing device based on walnut shell powder as polishing medium according to claim 6, characterized in that: A recycling screw (105) is rotatably installed in the recycling channel (104), the recycling screw (105) is driven by a recycling motor (103) fixedly installed at the bottom of the recycling channel (104), and the top end of the recycling screw (105) extends above the sliding guide groove (106). The collection pool (101) and the recycling channel (104) are fixedly installed on the base (113).

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