CN103817042B - A kind of coating apparatus for polymeric catheter surface - Google Patents

Abstract

The present invention relates to a kind of coating apparatus for polymeric catheter surface, it is characterized in that comprising the first support plate, the first support plate is provided with multiple through hole and groove; First support plate is connected on the first pillar by the first driving mechanism; The reservoir for holding masking liquid is provided with immediately below first support plate; Second pillar and described first pillar be arranged in parallel, and the second support plate is arranged on the second pillar by the second driving mechanism; Second support plate is provided with multiple spacing hole for spacing conduit to be sprayed; And the clamping device the second support plate is also provided with for locating conduit to be sprayed; Second pillar is also provided with the baffle plate passing the second support plate length for controlling conduit; Described flapper is connected on described second pillar.The invention provides a kind of brand-new coating way, uniform coating thickness, strong with the adhesion of catheter surface, avoid the waste of masking liquid, and can not pollute pipe inner wall in coating procedure, production wholesomeness and security all obtain guarantee.

Description

A coating device for the surface of polymer catheter

technical field

The invention relates to a coating device for the surface of a polymer catheter.

Background technique

At present, the known method of coating the hydrophilic super-slip coating on the polymer guide tip is the dip coating method or the spray coating method. For the dip coating method, the thickness of the coating is difficult to control, and the catheter is pulled out from the coating solution after soaking. The coating liquid will move downward under the action of gravity, which will cause the thickness of the coating to increase as the catheter goes down. The coating cannot be coated evenly, and the thickness is difficult to control. Spraying sprays the coating material and adheres to the surface of the catheter , but this kind of coating method is easy to cause waste of coating and low adhesion during the atomization spraying process, and has high requirements for equipment and site environment, and the equipment cost is relatively high.

Contents of the invention

The technical problem to be solved by the present invention is to provide a coating device for the surface of polymer catheters with firm coating adhesion, uniform coating thickness and no waste of coating liquid in view of the current state of the art.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: the coating equipment for the surface of polymer catheters is characterized in that it includes a first carrier plate, and the first carrier plate is provided with a plurality of through holes, each through hole The side walls of the holes are longitudinally provided with a plurality of ribs; the surface of the first carrier is provided with grooves communicating with each of the through holes; the first carrier is connected to the On a pillar, the first drive mechanism drives the first carrier to move up and down relative to the first pillar;

A liquid storage container for storing coating liquid is connected to the groove through a conduit, and the liquid storage container is arranged on the first column;

A liquid storage tank for holding the coating liquid is provided directly under the first carrier plate;

The second support is arranged in parallel with the first support, and the second support plate for positioning the conduit to be sprayed is arranged on the second support through a second drive mechanism, and the second drive mechanism drives the second support plate relative to the first support. The second support moves up and down; the second carrier is provided with a plurality of limiting holes for limiting the conduit to be coated; and the second carrier is also provided with clips for positioning the conduit to be sprayed fixed device.

In order to accurately control multiple conduits to be coated with the same coating height, a baffle plate for controlling the length of the conduit to be sprayed to pass through the second carrier plate can be provided on the second pillar; the baffle plate is rotatably connected on the second pillar. Through the baffle plate, the lengths of multiple conduits passing through the second carrier plate can be accurately controlled at the same time, so that these conduits can be precisely controlled to have the same coating height.

Preferably, the clamping device includes a plurality of boxes arranged on the upper surface of the second carrier plate corresponding to each of the limiting holes, and the bottom surface of each box is provided with a corresponding The perforation matched with the limit hole; the box body is provided with two limit blocks oppositely, and a spring is arranged between the limit block and the side of the box body, and the middle of the two limit blocks is connected with the The perforation of the limiting hole is consistent.

In this way, when the catheter is inserted into each limiting hole, the two limiting plates are pressed inward under the action of the spring, so that the two limiting plates clamp the catheter, thereby positioning the catheter on the limiting plate.

Preferably, the lower ends of the first pillar and the second pillar are arranged on the base, and the reservoir is arranged on the upper surface of the base and is located between the first pillar and the second pillar between.

The first driving mechanism and the second driving mechanism may be electric driving mechanisms in the prior art, such as driving mechanisms driven and controlled by motors, or hydraulic mechanisms, and so on. Preferably, the first driving mechanism is a first cylinder, the first support is provided with a first slider, and the first carrier is connected to the piston rod of the first cylinder through the first slider;

The second drive mechanism is a second air cylinder, a second slider is provided on the second pillar, and the second carrier plate is connected to the piston rod of the second air cylinder through the second slider.

Controlled by the air cylinder, it can effectively guarantee the sanitation during the catheter coating process.

As an improvement, the present invention adopts small-volume bottles for the infusion container of the first carrier, and a bracket for positioning the infusion container of the first carrier is provided on the first column.

In order to ensure the safety of the coating equipment, two control switches may be provided on the intake passage of the second cylinder, and the two control switches are connected in series. Only when the two control switches are closed at the same time, the second cylinder will start, which effectively avoids the injury to the staff caused by the second carrier plate moving down caused by misoperation.

Compared with the prior art, the coating equipment for the surface of the polymer catheter provided by the present invention provides a new coating method, which utilizes the surface tension of the coating liquid to form a thin film in the first carrier plate, to be coated The conduit passes through the film to form a coating film uniformly adhered to the surface of the conduit. By controlling the working time of the second cylinder, the number of reciprocating movements of the conduit to be coated in the first carrier can be controlled, thereby controlling the coating thickness of the conduit surface ; and the thickness of the coating formed in this way is uniform, the adhesion to the surface of the catheter is strong, the waste of the coating liquid is avoided, and the inner wall of the catheter will not be polluted during the coating process, and the production hygiene and safety have been improved. Assure. The coating equipment provided by the invention is especially suitable for the coating of medical catheters with high health and safety requirements.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the assembly structure of the embodiment of the present invention;

2 is a schematic diagram of a three-dimensional structure of a second carrier in an embodiment of the present invention;

FIG. 3 is a schematic diagram of a three-dimensional structure of a first carrier in an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 to 3, the coating equipment for the surface of polymer catheters includes:

The first carrier plate 1 is provided with a plurality of through holes 11 on the first carrier plate, five in the present embodiment; a plurality of ribs 12 are longitudinally provided on the side walls of each through hole; each rib in the present embodiment There is a smooth transition between them, and the surface of the convex rib is also a curved structure. A groove 13 is opened on the surface of the first carrier, and the groove 13 communicates with five through holes. The groove is a fluid replenishment channel for replenishing fluid into each through hole.

The base 2 is the supporting seat of the coating equipment. The middle part of the base 1 is provided with a liquid storage tank 21 , and the two sides of the liquid storage tank are respectively provided with a first column 3 and a second column 4 . The base 2 is provided with a first control switch 22 for controlling the operation of the first air cylinder (not shown in the figure) and a second control switch 23 for controlling the operation of the second air cylinder. There are two second control switches 23, and these two second control switches 23 are connected in series, and the second cylinder (not shown) will work only when they are closed at the same time.

The first column 3 is provided with a first slider 5 that can slide up and down along the first column 3 under the action of external force. The first slider 5 is connected to the piston rod of the first cylinder. The first slider 5 is connected to the first carrier 1 through a first connecting rod 51 . A bracket 31 for positioning the liquid storage container 7 is also provided on the first column 3 . The liquid storage container 7 is limited on the bracket 31 , the outlet of the liquid storage container 7 is connected to the groove 13 on the first carrier 1 through the conduit 8 , and the conduit 8 is provided with a flow control valve (not shown in the figure).

A limiting ring 52 for limiting the guide tube 8 is provided on the first connecting rod 51 .

The second column 4 is provided with a second slider 6 that can slide up and down along the second column 4 under the action of an external force, and the second slider 6 is connected to the piston rod of the second cylinder. The second slider 6 is connected to the second carrier 9 through a second connecting rod 61 .

The second column 4 is also provided with a baffle 41 for controlling the length of the conduit protruding from the second carrier 9 , and the baffle 41 can rotate around the second column 4 .

The second carrier plate 9 is provided with a plurality of limiting holes 91 through which the conduits to be coated pass. In order to facilitate the clamping of the coated conduit, a plurality of boxes 92 are arranged on the upper surface of the second carrier plate 9 in this embodiment, each box 92 corresponds to each limiting hole 91 one by one, and the bottom surface of the box 92 A through hole corresponding to the limit hole 91 is provided on the top. Also be provided with two spacer blocks 93 in each box body 92, be provided with arc-shaped breach 94 on the relative side of two spacer blocks 93, two arc-shaped breaches form and limit after two spacer blocks 93 butt joints. Perforations that correspond to bit holes. Two springs 95 are also arranged in the box body 92 , and the two ends of the springs respectively resist between the inner side of the box body and the limiting block 93 . The through hole 11 of the first carrier corresponds to the limiting hole 91 of the second carrier, and is adapted to the diameter of the conduit to be coated.

The box body 92, the limiting block 93 and the spring 95 constitute the clamping device of this embodiment.

The above-mentioned box body can also be replaced by providing grooves on the second carrier plate. In this solution, the limiting hole coincides with the perforation on the bottom surface of the box body, and the limiting block is arranged on the bottom surface of the groove and above the limiting hole.

The working principle of the coating equipment is described as follows:

Before coating, adjust the position of the first support plate relative to the first column according to the height of the conduit to be coated, and the height between the first support plate and the liquid level of the liquid storage tank should be greater than the coating length of the conduit to be coated.

Rotate the baffle so that the baffle is located below the second carrier, and the distance between the baffle and the second carrier matches the height of the catheter coating. The limit block in the box is pushed away, so that the conduit passes through the perforation and the limit hole and is exposed to the second carrier. When the lower end of the conduit touches the baffle plate, the limit block is released, and the limit block automatically clamps the respective conduits under the action of the spring.

Rotate the baffle outward to make the baffle out of coincidence with the second carrier, so as to facilitate the second carrier to move up and down.

Align each limiting hole on the second carrier board with each through hole on the first carrier board.

Close the flow control valve on the catheter and inject the coating solution into the reservoir and reservoir.

Pressing the first control switch makes the first carrier plate move downwards, dip into the liquid storage tank and return to its original position, and the coating liquid in the liquid storage tank forms a liquid film in the hole of the first carrier plate. The flow control valve is opened, and the coating liquid in the liquid storage container enters the groove through the conduit, and then enters each through hole, so as to continuously replenish the coating liquid into each through hole.

Press the two second control switches at the same time, the action of the second cylinder drives the second carrier plate to move down together with the conduit, pass through the through hole on the first carrier plate and reach the limit position, and then recover under the drive of the second cylinder initial position.

Determine the number of reciprocating catheters according to the thickness of the required coating until the specified coating thickness is completed. During coating, the flow of make-up solution can be controlled by a flow control valve. The reciprocating speed of the conduit can be controlled by adjusting the cylinder intake valve according to the coating effect.

After the coating is completed, open the limit blocks one by one, take off the conduit, and dry and cure the coating separately.

The coating equipment forms a liquid film through the surface tension of the coating liquid, and continuously replenishes the coating liquid to the first support plate through the infusion catheter and the infusion container, so that the liquid film is always kept in the through hole of the first support plate, and passes through the second support plate. Moving up and down, the catheter to be coated passes through the coating film in the through hole to form a uniformly coated film coating on the surface of the catheter; through multiple reciprocating movements, the uniformity and consistency of the catheter coating is effectively guaranteed; Moreover, the coating can be recycled, saving the coating solution and avoiding the waste of the coating solution.

At the same time, the equipment does not need an external power supply, and the power required is only compressed air, which not only saves energy and protects the environment, but also avoids the danger of equipment leakage and short circuit caused by coating liquid leakage and splashing. Equipped with the first carrier plate and the second carrier plate with different hole diameters, the catheters of different sizes can be adapted by replacing the first carrier plate and the second carrier plate.

The design of the two second control switches requires simultaneous operation of both hands to activate the second cylinder, ensuring that the operator can move the second carrier only after leaving the work area with both hands, avoiding pinch injuries caused by accidental collisions when using a single switch Danger, production safety has been further improved.

Claims (6)

1. A coating device for the surface of a polymer conduit, characterized in that it comprises a first carrier plate, on which a plurality of through holes are provided, and the side walls of each through hole are longitudinally provided with a plurality of Ribs; the surface of the first carrier plate is provided with grooves communicating with each of the through holes; the first carrier plate is connected to the first pillar through a first drive mechanism, and the first drive mechanism driving the first carrier to move up and down relative to the first support; A liquid storage container for storing coating liquid is connected to the groove through a conduit, and the liquid storage container is arranged on the first column; A liquid storage tank for holding the coating liquid is provided directly under the first carrier plate; The second support is arranged in parallel with the first support, and the second support plate for positioning the conduit to be sprayed is arranged on the second support through a second drive mechanism, and the second drive mechanism drives the second support plate relative to the first support. The second pillar moves up and down; the second carrier is provided with a plurality of limiting holes for limiting the conduit to be sprayed; and the second carrier is also provided with a clamp for positioning the conduit to be sprayed device. 2. The coating device for the surface of a polymer conduit according to claim 1, characterized in that the second pillar is also provided with a baffle plate for controlling the length of the conduit to be sprayed to pass through the second carrier plate; The baffle is rotatably connected to the second support. 3. The coating device for the surface of polymer catheter according to claim 1 or 2, characterized in that the clamping device includes a set of clamps on the upper surface of the second carrier plate and each of the limiters. There are a plurality of boxes corresponding to the position holes, and the bottom surface of each box is provided with perforations adapted to the corresponding limit holes; two limit blocks are oppositely arranged in the box body, and the limit blocks and the A spring is arranged between the sides of the box body, and the middle of the two limit blocks has a perforation consistent with the limit hole after they are butted. 4. The coating device for polymer catheter surface according to claim 3, characterized in that the lower ends of the first pillar and the second pillar are arranged on the base, and the liquid storage tank is arranged on the on the upper surface of the base and between the first support and the second support. 5. The coating equipment for polymer conduits according to claim 4, characterized in that the first drive mechanism is a first cylinder, the first pillar is provided with a first slider, and the first The carrier plate is connected to the piston rod of the first cylinder through the first slider; The second drive mechanism is a second air cylinder, a second slider is provided on the second pillar, and the second carrier plate is connected to the piston rod of the second air cylinder through the second slider. 6 . The coating equipment for polymer conduits according to claim 5 , wherein two control switches are arranged on the intake passage of the second cylinder, and the two control switches are connected in series. 7 .