Spraying device for coating for preparing balloon catheter

Abstract

The spraying device comprises a bin, a horizontal rail part, two limiting guide rails, a plurality of mounting frames and a plurality of horizontal moving parts, the bin is internally provided with a feeding position, a positioning position, a spraying position, a curing position, a lower moving position and a discharging position, and the positioning position is provided with an inserting device; the spraying position is provided with an ultrasonic spraying unit; the curing position is provided with a UV curing unit; the positioning position, the spraying position and the curing position are each provided with a rotary driving unit. According to the spraying device, cleaning before spraying can be achieved, in the whole process, the far end of the balloon catheter can be limited and supported through the mandrel, and therefore the balloon catheter is limited during machining, and better spraying and curing can be achieved; the repeated operation of spraying-curing can be automatically executed; according to the balloon catheter feeding device, feeding of a plurality of balloon catheters can be achieved at a time, the balloon catheters can be automatically moved to the machining positions one by one, and spraying and curing are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coating spraying device, more particularly, to a coating spraying device for balloon catheter preparation. BACKGROUND

[0002] Medical balloon catheter is an interventional medical device, which is widely used in the interventional treatment of cardiovascular, peripheral vascular and non-vascular cavity. It is usually used for expanding the narrow lumen (such as blood vessels), delivering and releasing stents, or serving as a delivery platform for other interventional operations. The core functional component of balloon catheter is an inflatable and contractible balloon. A typical medical balloon catheter usually includes the following basic components: a catheter and an inflatable balloon at the distal end of the catheter. In order to reduce the friction between the surface of the catheter and the human tissue and blood, and improve its smoothness in the blood vessel, a hydrophilic coating is usually applied to the surface of the balloon catheter. The hydrophilic coating can significantly reduce tissue damage and vascular trauma during interventional operation, improve the pushability and maneuverability of the catheter, make it easier for doctors to position the catheter to the target position, improve the comfort of patients and reduce the risk of surgical complications. The main process of hydrophilic coating usually involves the following key steps: 1) surface pretreatment: in order to improve the adhesion of the coating to the catheter substrate (such as balloon), the surface needs to be cleaned and activated. The traditional method may include chemical cleaning or preliminary plasma treatment. 2) coating operation: the coating solution is usually applied to the surface of the catheter by dipping, spraying or brushing. Among them, the spraying method is preferred because it can more accurately control the deposition of the coating on the complex shape (such as the folded balloon). 3) curing and crosslinking: the coated catheter needs to be heat treated (such as oven curing) or cured by ultraviolet light, so that the polymers in the coating are crosslinked to form a stable and durable film. Since the uniformity of the thickness of the hydrophilic coating has a direct impact on its lubricity, durability and biocompatibility. In order to accurately control the thickness of the final coating, especially to achieve the thickness requirement of microns or thinner, the existing technology often adopts a multi-step cycle process of "spraying-curing-re-spraying-re-curing". That is, first spray a very thin coating and immediately cure, then repeat the process several times, and accurately accumulate to the target thickness by layer-by-layer stacking.

[0003] Due to the need for repeated switching of equipment and environment in such a "spraying-curing" cycle operation, when lacking corresponding automatic processing devices, not only the operation complexity is increased, but also the production efficiency of single-piece products is significantly reduced. In addition, in the prior art, surface pretreatment (such as plasma cleaning to improve adhesion), spraying coating and curing crosslinking are sometimes independent processes, and the workpiece needs to be transferred between different equipment or stations. There is a lack of an integrated process scheme that seamlessly integrates and continuously performs the three key steps. In addition, when facing the production demand of a large number of balloon catheters, it is necessary to involve the problems of multiple balloon catheter batch feeding and processing one by one. Therefore, it is urgent to develop a new type of efficient batch, automatic and integrated production device suitable for the preparation of hydrophilic coating of medical balloon catheter, to improve the automation degree and batch production capacity of the preparation of hydrophilic coating of balloon catheter. SUMMARY

[0004] The present application aims to overcome the defects of the prior art and provide a coating spraying device for balloon catheter preparation.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a balloon catheter spraying device, comprising a warehouse, a horizontal rail part, two limiting guide rails and a plurality of mounting racks, a plurality of horizontal moving parts are installed at the horizontal rail part, an electric telescopic rod is fixed at the horizontal moving part, the mounting rack comprises an L-shaped translation frame and an L-shaped lifting frame, the L-shaped translation frame has two limiting sliding grooves, the L-shaped translation frame is installed with a rotating tube through a first bearing and a rotating shaft through a second bearing, a plurality of clamping blocks connected with the rotating tube through a first spring are arranged in the rotating tube, the rotating tube is fixedly connected with a gear ring, the rotating shaft is installed with a gear matched with the gear ring, the top end of the rotating shaft is fixed with a rotating block with an inverted frustum-shaped groove, the L-shaped translation frame is provided with a vertical groove, the vertical groove is provided with a vertical sliding groove and a positioning insertion hole, the top end of the vertical groove is provided with a first magnetic block, the L-shaped lifting frame is provided with a vertical sliding rail, the top end of the L-shaped lifting frame is provided with a second magnetic block, the L-shaped lifting frame is installed with a mandrel through a third bearing; the warehouse has a plurality of working positions, which are respectively a feeding position, a positioning position, a spraying position, a curing position, a downward moving position and a discharging position, the positioning position is provided with an insertion device capable of inserting the mandrel into the balloon catheter; the spraying position is provided with an ultrasonic spraying unit; the curing position is provided with a UV curing unit; the positioning position, the spraying position and the curing position are all installed with a rotary drive unit, the rotary drive unit comprises a first electric lifting rod, a drive motor installed on the first electric lifting rod and a drive block installed on the drive motor, the drive block can be inserted into the inverted frustum-shaped groove to drive the rotating block to rotate synchronously.

[0006] Further, the horizontal moving part is greater than or equal to four.

[0007] Further, the mounting rack can mount the balloon catheter.

[0008] Further, the clamping blocks are arc-shaped clamping blocks capable of clamping the balloon catheter; the number of the clamping blocks is greater than or equal to three and the clamping blocks are arranged in a ring shape at equal intervals.

[0009] Further, the two limiting sliding grooves are respectively matched with the two limiting guide rails.

[0010] Further, the movable end of the electric telescopic rod can be inserted into the positioning insertion hole.

[0011] Thus, the horizontal moving part can synchronously move with the mounting frame.

[0012] Further, the vertical sliding rail is matched with the vertical sliding groove.

[0013] Further, the second magnetic block can abut against and attract the first magnetic block.

[0014] Further, the top end of the vertical recess has a first recess, and the first magnetic block is fixed in the first recess; the top end of the L-shaped lifting frame has a second recess, and the second magnetic block is fixed in the second recess.

[0015] Further, the first electric lifting rod is fixed in the warehouse; and the horizontal rail part and the two limiting guide rails are fixed in the warehouse.

[0016] Further, the warehouse has a first door unit and a second door unit, the first door unit faces the upper feeding position, and the second door unit faces the lower feeding position.

[0017] Thus, the feeding and discharging operations are facilitated.

[0018] Further, the L-shaped translation frame includes a first horizontal rod and a first vertical rod, the rotating tube and the rotating shaft are located at the first horizontal rod, and the vertical recess and the positioning insertion hole are located at the first vertical rod; the L-shaped lifting frame includes a second horizontal rod and a second vertical rod, and the mandrel is mounted at the second horizontal rod.

[0019] Further, the horizontal moving part can move along the horizontal rail part.

[0020] Further, the apparatus further includes a protective gas supply unit capable of supplying nitrogen.

[0021] Thus, inert protective gas is provided for the spraying of the balloon catheter.

[0022] Further, the driving block includes a cylindrical portion and an inverted frustum-shaped portion connected with the cylindrical portion.

[0023] Further, the upper and lower feeding positions are each provided with a plurality of upper fixing blocks fixed to the upper limiting guide rails and a plurality of lower fixing blocks fixed to the lower limiting guide rails, the upper and lower fixing blocks are each connected with a positioning block through a second spring, and the L-shaped translation frame is provided with two positioning grooves capable of being inserted by the positioning blocks.

[0024] Further, the positioning grooves are semispherical or spherical crown-shaped, and the edges of the positioning grooves are provided with arc-shaped chamfers.

[0025] Therefore, the positioning blocks are more convenient to be inserted into or removed from the positioning grooves.

[0026] Further, the bottom end of the vertical groove of the L-shaped translation frame is provided with an insertion through hole, the insertion device comprises a second electric lifting rod, a first vertical track part, a first upper moving part capable of moving along the first vertical track part, a first upper electric push rod mounted to the first upper moving part, a limiting block fixed to the end of the first upper electric push rod, a fan mounted to the limiting block, an air pump mounted to the limiting block, a first lower moving part mounted to the first vertical track part, a first lower electric push rod mounted to the first lower moving part, and a plasma cleaning unit driven by the first lower electric push rod, the limiting block is provided with a U-shaped groove, the U-shaped groove is provided with a U-shaped air outlet nozzle and a limiting air bag in a U-shaped shape when filled, the air outlet nozzle is provided with an inner cavity and a plurality of air outlet holes, the fan is capable of blowing air into the inner cavity, and the air pump is capable of pumping and inflating the limiting air bag, and the movable end of the second electric lifting rod is capable of passing through the insertion through hole and abutting against the L-shaped lifting frame to make the L-shaped lifting frame rise.

[0027] Further, the air outlet holes are distributed in two horizontal heights, and the air outlet holes in the same horizontal height are arranged in a U-shaped manner.

[0028] Therefore, under the action of air outlet of the air outlet holes, the balloon catheter will not touch the U-shaped groove, thereby avoiding the adverse effects of unnecessary touching on the balloon catheter.

[0029] Further, the plasma cleaning unit comprises a main machine and a spray gun, and the spray gun is mounted to the movable end of the first lower electric push rod.

[0030] Therefore, the spray gun can move up and down, thereby realizing plasma cleaning of the part to be sprayed of the balloon catheter.

[0031] Further, the first vertical track part is fixed in the warehouse, and the second electric lifting rod is fixed in the warehouse.

[0032] Further, the mandrel comprises a cylindrical part and a frustoconical part connected to the cylindrical part and located above the cylindrical part.

[0033] Further, the diameter of the cylindrical portion of the mandrel is less than the inner diameter of the inner tube of the balloon catheter.

[0034] Thus, the mandrel can be more easily inserted into the channel of the inner tube of the balloon catheter, and after insertion, the mandrel and the inner side wall of the channel of the balloon catheter have a gap, so that when rotating, the mandrel does not need to rotate synchronously with the balloon catheter, and only needs to be limited to the bottom end of the balloon catheter.

[0035] Further, the balloon catheter comprises an outer tube, an inner tube, and a balloon, the distal end of the balloon is connected with the inner tube, and the proximal end of the balloon is connected with the outer tube.

[0036] Thus, the mandrel can be more easily inserted into the channel of the inner tube of the balloon catheter.

[0037] Further, the spraying position has a second vertical track portion, a second moving portion mounted on the second vertical track portion and capable of moving along the second vertical track portion, and a second electric push rod mounted on the second moving portion; the ultrasonic spraying unit is connected with the second electric push rod.

[0038] Thus, the ultrasonic spraying unit can move up and down to spray the balloon catheter.

[0039] Further, the second vertical track portion is fixed in the warehouse.

[0040] Further, the curing position has a fixed plate and a third electric push rod mounted on the fixed plate, the UV curing unit is connected with the third electric push rod, the UV curing unit comprises a curing chamber and a plurality of UV light sources mounted in the curing chamber; the top end and the bottom end of the curing chamber both have end recesses capable of being passed through by the balloon catheter.

[0041] Further, the fixed plate is fixed in the warehouse.

[0042] Further, the lower moving position is provided with a pulling-down device, the pulling-down device comprises a third vertical track portion, a third moving portion mounted on the third vertical track portion and capable of moving along the third vertical track portion, a fourth electric push rod mounted on the third moving portion, a translation seat connected with the fourth electric push rod, a rotating mechanism mounted on the translation seat, and a U-shaped rotating frame mounted on the rotating mechanism.

[0043] Further, the rotating mechanism is a rotary motor or a rotary air cylinder.

[0044] Thus, the rotating frame can abut against the L-shaped lifting frame, so that the L-shaped lifting frame can be lowered to the bottom end of the vertical recess.

[0045] Further, the third vertical track portion is fixed in the warehouse.

[0046] Further, the number of upper fixed blocks and lower fixed blocks at the upper feeding position is equal and is greater than or equal to 10.

[0047] Further, the number of upper fixed blocks and lower fixed blocks at the lower feeding position is equal and is greater than or equal to 10.

[0048] Beneficial effects:

[0049] 1. The spraying device of the present application can realize cleaning before spraying, and the entire process can realize positioning and supporting of the distal end of the balloon catheter by the mandrel, so that the balloon catheter is positioned during processing, better spraying and curing can be realized.

[0050] 2. The spraying device of the present application can realize automatic execution of the repeated operation of spraying-curing, does not need manual intervention in the middle, has high automation degree, and greatly improves production efficiency.

[0051] 3. The spraying device of the present application can realize feeding of multiple balloon catheters at one time, and can realize automatic movement of the balloon catheters to the processing position one by one, realize spraying and curing. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 The first perspective view when the spraying device performs spraying operation on one of the balloon catheters;

[0053] Figure 2 The enlarged view of the A area;

[0054] Figure 3 The enlarged view of the B area;

[0055] Figure 4 The enlarged view of the C area;

[0056] Figure 5 The second perspective view when the spraying device performs curing operation on one of the balloon catheters;

[0057] Figure 6 The enlarged view of the D area;

[0058] Figure 7 The enlarged view of the E area;

[0059] Figure 8 The first perspective view when the spraying device performs curing operation on one of the balloon catheters;

[0060] Figure 9 The enlarged view of the F area;

[0061] Figure 10 The enlarged view of the G area;

[0062] Figure 11 Second perspective view of the spraying device when performing a curing operation on one of the balloon catheters;

[0063] Figure 12 Enlarged view of region H;

[0064] Figure 13 Enlarged view of region I;

[0065] Figure 14 Third perspective view of the spraying device when performing a curing operation on one of the balloon catheters.

[0066] Figure 15 Enlarged view of region J;

[0067] Figure 16 Enlarged view of region K;

[0068] Figure 17 Enlarged view of region L.

[0069] BRIEF DESCRIPTION OF THE DRAWINGS: horizontal rail part 1; horizontal moving part 1.1; electric telescopic rod 1.2; limiting guide rail 2; lower fixed block 2.1; second spring 2.2; positioning block 2.3; L-shaped translation frame 3; vertical recess 3.1; vertical sliding groove 3.2; positioning jack 3.3; positioning recess 3.4; insertion through hole 3.5; L-shaped lifting frame 4; second magnetic block 4.1; mandrel 4.2; rotating tube 5; clamping block 5.1; gear ring 5.2; rotating shaft 6; gear wheel 6.1; rotating block 6.2; inverted conical recess 6.2.1; balloon catheter 7; second electric lifting rod 8.1; first vertical rail part 8.2; first upper moving part 8.2.1; first upper electric push rod 8.3; limiting block 8.4; air outlet nozzle 8.4.1; air outlet hole 8.4.2; limiting air bag 8.4.3; air blower 8.5; air pump 8.6; first lower moving part 8.7; first lower electric push rod 8.8; plasma cleaning unit 8.9; ultrasonic spraying unit 9; second vertical rail part 9.1; second moving part 9.2; second electric push rod 9.3; UV curing unit 10; fixed plate 10.1; third electric push rod 10.2; curing chamber 10.3; UV light source 10.4; end recess 10.5; first electric lifting rod 11.1; drive motor 11.2; drive block 11.3; third vertical rail part 12.1; third moving part 12.2; fourth electric push rod 12.3; translation seat 12.4; rotating mechanism 12.5; U-shaped rotating frame 12.6. DETAILED DESCRIPTION

[0070] Embodiments of the present application are described below in the context of example embodiments, which are shown in the drawings, wherein like or similar designations refer to like or similar elements or elements having the same or similar function throughout the text. The embodiments described below by way of example are intended to explain the present application, but are not to be understood as limiting the present application.

[0071] The application provides a coating spraying device for balloon catheter preparation, which is shown in the figure and comprises a warehouse, a horizontal track part 1, two limiting guide rails 2 and a plurality of mounting frames, a plurality of horizontal moving parts 1.1 are installed at the horizontal track part 1, an electric telescopic rod 1.2 is fixed at the horizontal moving part 1.1, the mounting frame comprises an L-shaped translation frame 3 and an L-shaped lifting frame 4, the L-shaped translation frame 3 is provided with two limiting sliding grooves, the L-shaped translation frame 3 is installed with a rotating tube 5 through a first bearing and a rotating shaft 6 through a second bearing, a plurality of clamping blocks 5.1 connected with the rotating tube 5 through first springs are arranged in the rotating tube 5, the rotating tube 5 is fixedly connected with a gear ring 5.2, the rotating shaft 6 is installed with a gear 6.1 matched with the gear ring 5.2, the top end of the rotating shaft 6 is fixed with a rotating block 6.2 with an inverted frustum-shaped groove 6.2.1, the L-shaped translation frame 3 is provided with a vertical groove 3.1, the vertical groove 3.1 is provided with a vertical sliding groove 3.2 and a positioning insertion hole 3.3, the top end of the vertical groove 3.1 is provided with a first magnetic block, the L-shaped lifting frame 4 is provided with a vertical sliding rail, the top end of the L-shaped lifting frame 4 is provided with a second magnetic block 4.1, the L-shaped lifting frame 4 is installed with a mandrel 4.2 through a third bearing; a plurality of working positions are arranged in the warehouse, which are respectively a feeding position, a positioning position, a spraying position, a curing position, a downward moving position and a discharging position, the positioning position is provided with an insertion device capable of inserting the mandrel 4.2 into a balloon catheter 7; the spraying position is provided with an ultrasonic spraying unit 9; the curing position is provided with a UV curing unit 10; the positioning position, the spraying position and the curing position are all installed with a rotary drive unit, the rotary drive unit comprises a first electric lifting rod 11.1, a drive motor 11.2 installed on the first electric lifting rod 11.1 and a drive block 11.3 installed on the drive motor 11.2, the drive block 11.3 can be inserted into the inverted frustum-shaped groove 6.2.1 to drive the rotating block 6.2 to rotate synchronously. The mounting frame can mount the balloon catheter 7. The clamping block 5.1 is an arc-shaped clamping block, and the clamping block 5.1 can clamp the balloon catheter 7; the number of the clamping blocks 5.1 is greater than or equal to three and is arranged in a ring shape at equal intervals. The movable end of the electric telescopic rod 1.2 can be inserted into the positioning insertion hole 3.3. The second magnetic block 4.1 can abut and attract the first magnetic block. The top end of the vertical groove 3.1 is provided with a first groove, and the first magnetic block is fixed in the first groove; the top end of the L-shaped lifting frame 4 is provided with a second groove, and the second magnetic block 4.1 is fixed in the second groove. The spraying device further comprises a protective gas supply unit capable of supplying nitrogen. The drive block 11.3 comprises a cylindrical part and an inverted frustum-shaped part connected with the cylindrical part.

[0072] The upper and lower feeding positions are provided with a plurality of upper fixed blocks of the fixed position guide rail 2 and a plurality of lower fixed blocks 2.1 of the fixed position guide rail 2, the upper fixed blocks and the lower fixed blocks are connected with a positioning block 2.3 through a second spring 2.2, the L-shaped translation frame 3 is provided with two positioning grooves 3.4 capable of being inserted by the positioning block 2.3; the positioning block 2.3 comprises a cylindrical portion and a hemispherical portion connected with the cylindrical portion. The bottom end of the vertical groove 3.1 of the L-shaped translation frame 3 is provided with an insertion through hole 3.5; the insertion device comprises a second electric lifting rod 8.1, a first vertical track part 8.2, a first upper moving part 8.2.1 capable of moving along the first vertical track part 8.2, a first upper electric push rod 8.3 installed on the first upper moving part 8.2.1, a limiting block 8.4 fixed to the end of the first upper electric push rod 8.3, a fan 8.5 installed on the limiting block 8.4, an air pump 8.6 installed on the limiting block 8.4, a first lower moving part 8.7 installed on the first vertical track part 8.2, a first lower electric push rod 8.8 installed on the first lower moving part 8.7 and a plasma cleaning unit 8.9 driven by the first lower electric push rod 8.8, the limiting block 8.4 is provided with a U-shaped groove, the U-shaped groove is provided with a U-shaped air outlet nozzle 8.4.1 and a limiting air bag 8.4.3 in U shape when filled, the air outlet nozzle 8.4.1 is provided with an inner cavity and a plurality of air outlet holes 8.4.2, the fan 8.5 can blow air into the inner cavity, the air pump 8.6 can pump and inflate the limiting air bag 8.4.3; the movable end of the second electric lifting rod 8.1 can pass through the insertion through hole 3.5 and abut against the L-shaped lifting frame 4 so that the L-shaped lifting frame 4 rises. The mandrel 4.2 comprises a cylindrical portion and a frustoconical portion connected with the cylindrical portion and located above the cylindrical portion; the diameter of the cylindrical portion of the mandrel 4.2 is smaller than the inner diameter of the inner tube of the balloon catheter 7. The balloon catheter 7 comprises an outer tube, an inner tube and a balloon, the distal end of the balloon is connected with the inner tube, and the proximal end of the balloon is connected with the outer tube.

[0073] The spraying position has a second vertical track 9.1, a second moving part 9.2 mounted on the second vertical track 9.1 and movable along the second vertical track 9.1, and a second electric push rod 9.3 mounted on the second moving part 9.2; the ultrasonic spraying unit 9 is connected to the second electric push rod 9.3. The curing position has a fixing plate 10.1 and a third electric push rod 10.2 mounted on the fixing plate 10.1; the UV curing unit 10 is connected to the third electric push rod; the UV curing unit 10 includes a curing chamber 10.3 and multiple UV light sources 10.4 installed in the curing chamber 10.3; the top and bottom ends of the curing chamber 10.3 each have end grooves 10.5 through which the balloon catheter 7 can pass. The fixing plate 10.1 is fixed inside the chamber. A pull-down device is installed at the lower displacement position. The pull-down device includes a third vertical track section 12.1, a third moving section 12.2 mounted on the third vertical track section 12.1 and movable along the third vertical track section 12.1, a fourth electric push rod 12.3 mounted on the third moving section 12.2, a translation seat 12.4 connected to the fourth electric push rod 12.3, a rotating mechanism 12.5 mounted on the translation seat 12.4, and a U-shaped rotating frame 12.6 mounted on the rotating mechanism 12.5. The number of upper and lower fixed blocks at the loading position is equal and greater than or equal to 10; the number of upper and lower fixed blocks at the unloading position is equal and greater than or equal to 10.

[0074] Working Principle: The spraying device of this application, as shown in the figure, has a loading position, a positioning position, a spraying position, a curing position, a lowering position, and a unloading position sequentially from upstream to downstream. At the loading position, multiple balloon catheters can be installed on the mounting frame. The horizontal moving part can move the mounting frame one by one, moving it to the positioning position for inserting and positioning the mandrel and cleaning the area of ​​the balloon catheter to be sprayed, moving it to the spraying position for spraying, moving it to the curing position for curing, moving it to the lowering position to lower the L-shaped lifting frame, and finally moving it to the unloading position. The horizontal moving part moves the mounting frame by inserting the movable end of the electric telescopic rod into the positioning hole. Under the external force of the horizontal moving part, the positioning block can be embedded in the positioning groove or emerge from the positioning groove.

[0075] Specifically, in the positioning position, the proximal end of the balloon catheter is held by the clamping block, allowing it to accurately embed into the U-shaped groove of the limiting block. A fan blows air through multiple vents, creating a gentle breeze. This gentle breeze prevents the balloon catheter from contacting the sidewall of the U-shaped groove as the limiting block moves downwards. Once the limiting block reaches the set position, the fan stops, and the limiting airbag inflates, precisely positioning the bottom end of the balloon catheter. Then, the second electric lifting rod rises, causing the L-shaped lifting frame to move upwards. This allows the mandrel to insert into the bottom end of the balloon catheter, and the first and second magnetic blocks attract each other, fixing the L-shaped lifting frame in place. Because of the mandrel's support, the bottom end of the balloon catheter remains more stable when rotating (the mandrel itself can rotate, but it doesn't need to rotate with the balloon catheter; it only needs to limit the bottom end of the balloon catheter). The bottom end of the balloon catheter will not drift. In the positioning position, the balloon catheter rotates, and the plasma cleaning device can clean the sprayed area.

[0076] At the spraying position, the ultrasonic spraying unit sprays the balloon catheter while it rotates. At the curing position, the balloon catheter rotates, and a UV light source cures the sprayed area. The spraying-curing cycle can be automatically switched and repeated multiple times under the drive of the horizontal moving part. In the downward movement position, the U-shaped rotating frame abuts against the second horizontal bar of the L-shaped lifting frame, thereby lowering the L-shaped lifting frame and disengaging the mandrel from the balloon catheter, facilitating the subsequent unloading of the balloon catheter at the unloading position.

[0077] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention without departing from the scope defined by the claims.

Claims

1. A coating spray device for balloon catheter preparation, characterized by, The utility model provides a kind of automatic spraying device for balloon catheter, including warehouse, horizontal track part, two limiting guide rails and multiple mounting racks, multiple horizontal moving parts are installed at the horizontal track part, electric telescopic rod is fixed at the horizontal moving part, the mounting rack includes L-shaped translation frame and L-shaped lifting frame, the L-shaped translation frame has two limiting sliding slot, the L-shaped translation frame is installed with rotating tube by first bearing and rotating shaft by second bearing, rotating tube has multiple clamping blocks connected by first spring in it, the rotating tube is fixedly connected with gear ring, the rotating shaft is installed with gear that cooperates with gear ring, the top of rotating shaft is fixed with rotating block with inverted cone frustum recess, the L-shaped translation frame has vertical recess, vertical recess has vertical sliding slot and positioning insertion hole, the top of vertical recess has first magnetic block, the L-shaped lifting frame has vertical slide rail, the top of L-shaped lifting frame has second magnetic block, the L-shaped lifting frame is installed with core shaft by third bearing;The warehouse has multiple work positions, respectively, feeding position, positioning position, spraying position, curing position, down position and discharging position, the positioning position has insertion device that can insert core shaft into balloon catheter;The spraying position has ultrasonic spraying unit;The curing position has UV curing unit;Rotary drive unit is installed at the positioning position, spraying position and curing position, and the rotary drive unit includes first electric lifting rod, drive motor mounted on the first electric lifting rod and drive block mounted on the drive motor, the drive block can be inserted into inverted cone frustum recess to drive rotating block to rotate synchronously.

2. The balloon catheter preparation coating spray device according to claim 1, characterized in that The feeding position and discharging position have multiple upper fixed blocks fixed to the limiting guide rails above and multiple lower fixed blocks fixed to the limiting guide rails below, the upper fixed blocks and lower fixed blocks are connected with positioning blocks by second springs, and the L-shaped translation frame has two positioning recesses that can be inserted by the positioning blocks;The positioning block includes a cylindrical portion and a hemispherical portion connected to the cylindrical portion.

3. The balloon catheter preparation coating spray device of claim 1, wherein, The bottom end of the vertical recess of the L-shaped translation frame has an insertion through hole;The insertion device includes a second electric lifting rod, a first vertical track part, a first upper moving part capable of moving along the first vertical track part, a first upper electric push rod mounted on the first upper moving part, a limiting block fixed to the end of the first upper electric push rod, a fan mounted on the limiting block, an air pump mounted on the limiting block, a first lower moving part mounted on the first vertical track part, a first lower electric push rod mounted on the first lower moving part, and a plasma cleaning unit driven by the first lower electric push rod, the limiting block has a U-shaped recess, the U-shaped recess has a U-shaped air outlet nozzle and a limiting air bag that is U-shaped when filled, the air outlet nozzle has an inner cavity and multiple air outlet holes, the fan can blow air into the inner cavity, and the air pump can deflate and inflate the limiting air bag;The movable end of the second electric lifting rod can pass through the insertion through hole and abut against the L-shaped lifting frame to make the L-shaped lifting frame rise.

4. The balloon catheter preparation coating spray device of claim 1, wherein, The core shaft includes a cylindrical portion and a frustum portion connected to the cylindrical portion and located above the cylindrical portion;The diameter of the cylindrical portion of the core shaft is smaller than the inner diameter of the inner tube of the balloon catheter.

5. The balloon catheter preparation coating spray device of claim 1, wherein, The spraying position is provided with a second vertical track part, a second moving part installed on the second vertical track part and capable of moving along the second vertical track part, and a second electric push rod installed on the second moving part; the ultrasonic spraying unit is connected with the second electric push rod.

6. The balloon catheter preparation coating spray device of claim 1, wherein, The curing position is provided with a fixing plate, a third electric push rod installed on the fixing plate, and a UV curing unit connected with the third electric push rod, wherein the UV curing unit comprises a curing chamber and a plurality of UV light sources installed in the curing chamber; the top end and the bottom end of the curing chamber are both provided with an end recess capable of being passed through by the balloon catheter.

7. The balloon catheter preparation coating spray device of claim 1, wherein, The lowering position is provided with a pulling-down device, which comprises a third vertical track part, a third moving part installed on the third vertical track part and capable of moving along the third vertical track part, a fourth electric push rod installed on the third moving part, a translation seat connected with the fourth electric push rod, a rotating mechanism installed on the translation seat, and a U-shaped rotating frame installed on the rotating mechanism.

8. The balloon catheter preparation coating spray device of claim 1, wherein, The number of the upper fixing blocks and the lower fixing blocks at the feeding position is equal and is greater than or equal to 10; the number of the upper fixing blocks and the lower fixing blocks at the discharging position is equal and is greater than or equal to 10.

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