CN217528034U - Device for dip-coating intravascular stent - Google Patents
Device for dip-coating intravascular stent Download PDFInfo
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- CN217528034U CN217528034U CN202221531083.3U CN202221531083U CN217528034U CN 217528034 U CN217528034 U CN 217528034U CN 202221531083 U CN202221531083 U CN 202221531083U CN 217528034 U CN217528034 U CN 217528034U
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Abstract
The utility model discloses a device for dip-coating of a vascular stent, which comprises a lifting device, wherein the outside of the lifting device is connected with a dip-coating mechanism, and the lifting device is used for driving the dip-coating mechanism to move up and down; the dip-coating mechanism comprises a rotating motor, a motor wheel set is connected below the rotating motor, and at least one dip-coating frame is connected below the motor wheel set; the bracket is arranged on the dip-coating frame; the dip-coating container is arranged below the dip-coating mechanism and is used for containing dip-coating solution; and the air hood is wrapped outside the dip coating mechanism, and the air valve member can be arranged around the inner side or the outer side of the dip coating mechanism and used for removing residual paint on the surface of the stent. The device can carry out the dip-coating to the support by high efficiency, can get rid of the unnecessary coating in support surface after the dip-coating simultaneously for support surface coating is more even, avoids the conjunctiva structure that forms between the mesh.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to a device for vascular support dip-coating.
Background
At present, stents (all called intravascular wall stents) have become the main means of PCI treatment. The stent can maintain the postoperative vessel expansion state through the weak support of the stent, simultaneously reduce the damage repair influence and prevent the vessel from narrowing in a longer time. The stent is generally made into cylinders with different structures by adopting special alloy, is implanted into a stenotic lesion of a blood vessel through a catheter, keeps smooth blood flow through balloon posting, and increases perfusion. Particularly, the rising and application of coating stents (such as drug eluting stents, chemical coating stents, etc.) in recent years obviously reduces the incidence rate of restenosis after stent operation. The preparation method of such stents includes dip coating, sputtering, deposition, etc., wherein the dip coating method is widely adopted because of its advantages of low cost, convenient operation, etc.
According to the manufacturing process of the bracket, the bracket can be divided into a laser engraving bracket and a weaving bracket, and the common characteristic is that the bracket comprises uniformly distributed reticular unit structures which are connected with each other. The complex reticular unit structure of the stent causes that when a coating solution is dip-coated and pulled, partial coating is remained among the reticular unit structures due to the surface tension of the coating (such as drugs and polymers), so that the prepared coated stent has the defects of coating blockage, entanglement, local over-thickness of the coating and the like. In addition, the entangled or occluded part is easily detached from the stent, and serious adverse effects are caused after the stent enters the blood vessel.
Coated medical devices and methods of making and using them are disclosed in CN 105073070B, which uses a single coated stent fixed to a frame in a manner to be dipped into a coating solution and then air knife is used to de-air the stent surface to remove excess coating between the meshes. However, this method can only process one stent in one process flow, the application efficiency is too low, and it is difficult to work with some coating air knives which crosslink faster, and it is still not effective to ensure the uniformity and integrity of the coating. In other documents, it is also possible to use a fast rotating stent to throw off excess coating residues, but this approach does not solve the coating uniformity of the coating very well and may affect the structural characteristics of the stent.
Therefore, people pay attention to how to improve the physical dip coating efficiency of the stent and further improve the dip coating effect of the complex structure of the stent.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a device for dip-coating a vascular stent.
In order to realize the purpose, the utility model adopts the following technical scheme: a device for dip-coating a vascular stent comprises a lifting device, wherein a dip-coating mechanism is connected to the outside of the lifting device, and the lifting device is used for driving the dip-coating mechanism to move up and down;
the dip-coating mechanism comprises a rotating motor, a motor wheel set is connected below the rotating motor, and at least one dip-coating frame is connected below the motor wheel set;
the bracket is arranged on the dip-coating frame;
the dip-coating container is arranged below the dip-coating mechanism and is used for containing dip-coating solution;
and the gas hood is wrapped outside the dip-coating mechanism, and the gas valve member is arranged on the inner side or the periphery of the outer side of the dip-coating mechanism and used for removing residual paint on the surface of the bracket.
As a further description of the above technical solution: the dip-coating mechanism is connected with the motion connecting rod on the lifting equipment through a hole on the wheel set, the wheel set consists of a fixed wheel and a wheel box, and a plurality of mounting holes used for being connected with the dip-coating frame are distributed on the fixed wheel along the center.
As a further description of the above technical solution: the wheel set comprises a sun wheel and planet wheels meshed with the sun wheel through gears, the protruding portions of the planet wheels are connected with the dip-coating frame, and multiple groups of planet wheels are arranged.
As a further description of the above technical solution: the dip-coating frame includes the connecting block, the external connection of connecting block has the framework, the needle bar has been inserted in the through-hole of connecting block, with the core pipe that sets up on the framework cooperatees for adjust the axial position of support.
As a further description of the above technical solution: the gas hood is in a circumferential semi-closed shape or a circumferential full-closed shape.
As a further description of the above technical solution: the air valve component comprises an air knife and an air pipe or an air valve matched with the air knife, a plurality of air exhaust grooves or air holes are formed in the side wall of the air knife along the axial direction and the circumferential direction, and the height of each air exhaust groove is 10-50mm.
As a further description of the above technical solution: the air knife is a nozzle, and the shape of an air hole or an exhaust groove at the front end of the nozzle is circular, square or rhombic.
As a further description of the above technical solution: the aperture of the air hole or the width of the air exhaust groove is 1-5mm.
As a further description of the above technical solution: the air valve component is provided with one or more.
As a further description of the above technical solution: the gas valve member sprays gas flow which is air, nitrogen, argon gas amber or mixed gas, the distance between a nozzle of the gas knife and the support is 2-15mm, the gas flow parameter of the gas valve member is 20-50slpm or 60-300slpm, and the gas pressure parameter is 10-20psi.
The utility model discloses following beneficial effect has:
1. the utility model can move or stop in the vertical direction by connecting the lifting equipment with the dip-coating mechanism, the dip-coating speed and time of the bracket can be adjusted, and then the dip-coating mechanism is connected with the bracket and drives the bracket to rotate at a certain speed; when the support is immersed completely by the immersion liquid, the immersion mechanism stops moving downwards, the mesh of the support is completely covered by the immersion liquid due to forward/reverse rotation of the support, and the coating is adsorbed on the surface of the support through intermolecular force, so that the immersion efficiency of the support is improved.
2. The utility model discloses an air knife of pneumatic valve member is under the condition that lets in high pressure draught, and to the radial direction of support, keeps rotatory or limit rotation side reciprocating motion at the support, just can blow off the unnecessary coating in support surface for support surface coating is more even, avoids the conjunctiva structure that forms between the mesh, utilizes the gas hood can be restrained the air current that sprays in the gas hood simultaneously, and unnecessary coating is difficult to be caused the pollution by spraying around the equipment.
Drawings
Fig. 1 is a schematic view of a device for dip-coating a vascular stent according to the present invention;
fig. 2 is a schematic view of the circumferential semi-closed gas hood of the device for dip-coating the vascular stent provided by the utility model in use;
fig. 3 is a perspective view of a wheel set of a device for dip-coating a vascular stent according to the present invention;
FIG. 4 is a perspective view of another view angle of the wheel set of the device for dip-coating the stent-graft according to the present invention
FIG. 5 is an exploded view of a planetary gear set of a device for dip-coating a vascular stent according to the present invention
FIG. 6 is a schematic view of a dip-coating frame of a device for dip-coating a stent
FIG. 7 is a schematic view of a circumferential semi-closed gas hood of a device for dip-coating a vascular stent provided by the present invention
FIG. 8 is a schematic view of the circumferential totally-enclosed gas hood of the device for dip-coating the vascular stent of the present invention
FIG. 9 is a schematic view of the circumferential totally-enclosed gas hood of the device for dip-coating of vascular stents in use
FIG. 10 is a schematic view of an air valve member of a device for dip-coating a vascular stent according to the present invention
FIG. 11 is a schematic view of an air knife of an apparatus for dip-coating a stent graft according to the present invention
FIG. 12 is a schematic view of an air knife of an apparatus for dip-coating a stent graft according to the present invention
FIG. 13 is a schematic view of an air knife of an apparatus for dip-coating a stent graft according to the present invention
FIG. 14 is a schematic view of an air knife of an apparatus for dip coating a stent graft according to the present invention
Fig. 15 is a schematic view of an air knife of an apparatus for dip coating a vascular stent according to the present invention.
Illustration of the drawings:
1. a pulling apparatus; 2. a dip coating mechanism; 21. a rotating electric machine; 22. a machine wheel set; 23. dip-coating the frame; 231. connecting blocks; 232. a frame body; 233. a needle bar; 234. a core tube; 3. a support; 4. dip-coating the container; 5. a gas hood; 6. a gas valve member; 61. an air knife; 62. the trachea.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides an embodiment: a device for dip-coating a vascular stent comprises a lifting device 1, wherein the lifting device 1 is a linear motion mechanism capable of moving up and down and is connected with a dip-coating mechanism 2 through a motion connecting rod, the dip-coating mechanism 2 is connected to the outside of the lifting device 1, and the lifting device 1 is used for driving the dip-coating mechanism 2 to move up and down;
the dip-coating mechanism 2 comprises a rotating motor 21, an organic wheel set 22 is connected below the rotating motor 21, and at least one dip-coating frame 23 is connected below the organic wheel set 22;
the bracket 3 is arranged on the dip-coating frame 23;
the dip-coating container 4 is arranged below the dip-coating mechanism 2 and is used for containing dip-coating solution;
and the air hood 5 is wrapped outside the dip-coating mechanism 2, and the air valve member 6 is arranged on the inner side or the periphery of the dip-coating mechanism 2 and used for removing residual paint on the surface of the bracket 3.
According to the technical scheme, the support 3 to be subjected to dip coating is arranged between the needle bar 233 and the core pipe 234 of the dip coating frame 23, then the dip coating frame 23 is arranged on the mounting hole below the locomotive unit 22, the dip coating mechanism 2 is driven to move downwards by the lifting device 1, so that the support 3 is immersed into the dip coating container 4 below, then the wheel set 22 is driven to rotate by the rotating motor 21, so that the dip coating frame 23 is driven to perform dip coating in the dip coating container 4, after the dip coating is completed, the dip coating mechanism 2 is driven to move upwards by the lifting device 1, when the dip coating mechanism 2 is completely removed from the dip coating liquid, the dip coating container 4 is withdrawn, then as shown in fig. 2, when the upper end face of the wheel set 22 is nearly aligned with the upper end face of the air hood 5, the dip coating mechanism 2 stops moving upwards, the air knife 61 is arranged at the center of the plurality of dip coating frames 23, the air knife 61 is sprayed out from the open slot or air hole formed on the surface of the air knife, at the moment, the support 3 is only required to rotate, the redundant coating on the surface of the support 3 is blown off under the impact of air flow, so that the coating is more uniform, the coating surface, the conjunctiva structure is prevented from being formed between the air knife, and the temperature after the air knife is heated to be 30 minutes, so that the sample can be heated to be heated for curing time of the sample at the room temperature of 50 minutes (30 minutes) or the heating temperature of the sample can be heated to be 50 minutes after the temperature of the sample.
Further, the dip-coating mechanism 2 is connected with a moving connecting rod on the lifting device 1 through a hole on the machine wheel set 22, the machine wheel set 22 is composed of a fixed machine wheel and a machine wheel set, a plurality of mounting holes used for being connected with the dip-coating frame 23 are distributed on the fixed machine wheel along the center, the fixed machine wheel can be one of a gear, a roller or a belt, the fixed machine wheel can fix the interior of the machine wheel set through the fixing holes formed in the surface of the fixed machine wheel by using pin pins to avoid left and right shaking among the machine wheels, the dip-coating frame 23 is connected with the machine wheel set 22 through the mounting holes and used for driving the dip-coating frame 23 to rotate, wherein the dip-coating frame 23 is mechanically matched with the mounting holes, so that the upper end of the dip-coating frame 23 can be coated with a high polymer material (nylon, PET, PTFE or other elastic materials), and the coated high polymer material is tightly attached to the mounting holes and provides effective friction force during matching; or the inside of the mounting hole contains a clamping piece which is used for clamping the upper part of the dip coating frame 23 to fix the dip coating frame in matching.
Referring to fig. 3-5, the present invention provides an embodiment, wheel set 22 includes sun gear and planetary gear engaged with it through gear, the protruding portion of sun gear penetrates through the through hole located at the center of the wheel box and is connected with the rotating shaft of rotating electrical machine 21, rotating electrical machine 21 drives sun gear to rotate, so that planetary gear can rotate along with the sun gear synchronously, dip-coating frame 23 can rotate around the sun gear, so as to increase the efficiency of dip-coating, the protruding portion of planetary gear is connected with dip-coating frame 23, the planetary gear is provided with multiple sets, and the specifications of planetary gear are the same, such as one set, two sets, three sets or more, and the rotating speed of planetary gear is preferably between 20-180rpm, and most preferably between 60-100 rpm.
Further, as shown in fig. 6, the dip coating frame 23 includes a connection block 231, a frame body 232 is connected to an outside of the connection block 231, a needle bar 233 is inserted into a through hole of the connection block 231 and is fitted with a core pipe 234 provided on the frame body 232, the frame body 232 has upper and lower ends, and the upper and lower portions of the frame body 232 may be an integral or two-part customized one/two-material, the material may be one or more of a metal material (e.g., aluminum, stainless steel, cobalt-chromium alloy, etc.) or a rigid polymer material (e.g., acryl, nylon, polyethylene, polytetrafluoroethylene, etc.), the frame body 232 may have one or more configurations of a cylindrical wire and a square wire, the needle bar 233 may be introduced into the through hole of the connection block 231 and may be moved and fixed in directions of the upper and lower ends of the frame 232, and for flexible movement and fixation of the needle bar 233, an O-shaped ring may be selected to be fitted on the connection rod on the frame body 232 to fix, and the needle bar 233 and the needle bar 234 may be approximately overlapped along an axis, and both ends of the needle bar 233 and the needle bar 3 may be fixed, and the length of the frame may be adjusted to have a mesh structure of a mesh angle of 3 equal to be changed when the needle bar is dipped and the mesh angle is equal to a minimum mesh angle is equal to a mesh angle of 40 degrees.
Further, the gas hood 5 is in a circumferential semi-closed shape or a circumferential fully-closed shape, as shown in fig. 7 and fig. 2, when the gas hood 5 is in a circumferential semi-closed shape, the gas hood 5 is arranged right below the dip-coating mechanism 2, the gas knife 61 extends into the central area of the dip-coating frames 23 from the slit of the gas hood, the gas knife 61 is kept axially parallel to the support 3, the air flow is sprayed along the line of the air discharge groove of the gas knife 61 at a height to completely cover the whole support 3 along the axial direction, the uniform air flow generated by the air discharge groove of the gas knife 61 acts on the surface of the support 3, and the residual coating on the surface of the support 3 can be uniformly reduced/eliminated only by rotating each dip-coating frame 23 with the support 3 sample. In addition, the air hood 5 with semi-closed circumference can adjust the position of the air knife 61 up and down along the slot, and the sprayed air flow is restricted in the air hood 5 due to the existence of the air hood 5, so that redundant coating is not easy to be sprayed to the periphery of equipment to cause pollution; as shown in fig. 8-9, when the air hood 5 is a circular totally-enclosed shape, the air knife 61 is fixed on the periphery of the wall of the air hood 5 and is disposed directly below the dip coating mechanism 2, wherein the nozzles of the air knife 61 are distributed along a single side or a circle of the air hood 5, that is, the nozzles are fixed in the connection holes of the air hood 5, the nozzles are transversely aligned or inclined at a certain angle (such as 0-90 °) relative to the stent 3 for point spraying, and at this time, the dip coating frame 23 and the stent 3 need to rotate and move up and down, because the air hood 5 with the circular totally-enclosed shape can restrain the sprayed air flow in the air hood 5 and generate convection between the air flows, the air flow between meshes of the stent 3 is increased, and the efficiency of removing the residual excess coating is improved. In addition, the number of the nozzles can be one or more, and the nozzles can be distributed in a circumferential distribution with one or more horizontal rows of air knives or in a circumferential distribution with the nozzles crossing up and down.
Further, as shown in fig. 10, the air valve member 6 includes an air knife 61 and an air tube 62 or an air valve matched with the air knife 61, the rear end of the air knife may be connected to the air tube 62 or directly fixed on the air valve, the air valve is connected to an external air bottle or an air pressure device, the side wall of the air knife 61 is provided with a plurality of air discharge grooves or air holes along the axial direction and the circumferential direction, and the height of the air discharge grooves is 10-50mm. As shown in the figures, the air knife 61 is a nozzle, as shown in the figures 11 to 13, the shape of the air hole or the air exhaust groove at the front end of the nozzle is circular, square or diamond, and when the point air blowing scheme shown in the figures 14 to 15 is adopted, the lifting device 1 needs to drive the moving connecting rod so as to drive the dip coating frame 23 and the bracket 3 to be processed to move up and down.
Further, the aperture of the air hole or the width of the air discharge groove is 1 to 5mm, the most preferable diameter is 2mm, and the height of the air discharge groove of the air knife 61 is preferably 10 to 50mm.
Further, the air valve member 6 is provided with one or more, two, three, four or more, so as to ensure the removing effect of the residual paint.
Further, the gas flow sprayed by the gas valve member 6 is air, nitrogen, argon or mixed gas, the nozzle of the gas knife 61 is 2-15mm away from the support 3, the gas flow parameter of the gas valve member 6 is 20-50slpm or 60-300slpm, and the gas pressure parameter is 10-20psi.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (10)
1. A device for dip-coating of a vascular stent, characterized in that: the dip-coating device comprises a lifting device (1), wherein a dip-coating mechanism (2) is connected to the outer part of the lifting device (1), and the lifting device (1) is used for driving the dip-coating mechanism (2) to move up and down;
the dip-coating mechanism (2) comprises a rotating motor (21), an organic wheel set (22) is connected below the rotating motor (21), and at least one dip-coating frame (23) is connected below the organic wheel set (22);
the bracket (3) is arranged on the dip-coating frame (23);
the dip-coating container (4) is arranged below the dip-coating mechanism (2) and is used for containing dip-coating solution;
and the gas hood (5) is wrapped outside the dip-coating mechanism (2), and the gas valve member (6) is arranged on the inner side or the periphery of the outer side of the dip-coating mechanism (2) and used for removing residual paint on the surface of the support (3).
2. The device for dip coating of a vascular stent according to claim 1, wherein: dip-coating mechanism (2) through the hole on locomotive wheelset (22) with carry and pull up the motion connecting rod on the equipment (1) and be connected, locomotive wheelset (22) comprise fixed wheel and wheel case, just fixed wheel along the central distribution have a plurality of be used for with dip-coating frame (23) the mounting hole that is connected.
3. The device for dip coating of vascular stents according to claim 1, wherein: the engine wheel set (22) comprises a sun wheel and planet wheels meshed with the sun wheel through gears, the protruding parts of the planet wheels are connected with the dip-coating frame (23), and multiple groups of planet wheels are arranged.
4. The device for dip coating of vascular stents according to claim 1, wherein: dip-coating frame (23) is including connecting block (231), the external connection of connecting block (231) has framework (232), needle bar (233) have been inserted in the through-hole of connecting block (231), with core pipe (234) that set up on framework (232) cooperate, be used for adjusting the axial position of support (3).
5. The device for dip coating of a vascular stent according to claim 1, wherein: the gas hood (5) is in a circumferential semi-closed shape or a circumferential full-closed shape.
6. The device for dip coating of a vascular stent according to claim 1, wherein: the air valve component (6) comprises an air knife (61) and an air pipe (62) or an air valve matched with the air knife (61), a plurality of air exhaust grooves or air holes are formed in the side wall of the air knife (61) along the axial direction and the circumferential direction, and the height of each air exhaust groove is 10-50mm.
7. The device for dip coating of a vascular stent according to claim 6, wherein: the air knife (61) is a nozzle, and the shape of an air hole or an exhaust groove at the front end of the nozzle is circular, square or rhombic.
8. The device for dip coating of vascular stents according to claim 7, wherein: the aperture of the air hole or the width of the air exhaust groove is 1-5mm.
9. The device for dip coating of a vascular stent according to claim 1, wherein: the air valve component (6) is provided with one or more than one.
10. The device for dip coating of a vascular stent according to claim 6, wherein: the gas flow sprayed by the gas valve component (6) is air, nitrogen, argon gas amber or mixed gas, the distance between the nozzle of the gas knife (61) and the support (3) is 2-15mm, the gas flow parameter of the gas valve component (6) is 20-50slpm or 60-300slpm, and the gas pressure parameter is 10-20psi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221531083.3U CN217528034U (en) | 2022-06-16 | 2022-06-16 | Device for dip-coating intravascular stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221531083.3U CN217528034U (en) | 2022-06-16 | 2022-06-16 | Device for dip-coating intravascular stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217528034U true CN217528034U (en) | 2022-10-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221531083.3U Active CN217528034U (en) | 2022-06-16 | 2022-06-16 | Device for dip-coating intravascular stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217528034U (en) |
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2022
- 2022-06-16 CN CN202221531083.3U patent/CN217528034U/en active Active
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