CN112547435A - Improved surface silicification device for injection needle tube - Google Patents
Improved surface silicification device for injection needle tube Download PDFInfo
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- CN112547435A CN112547435A CN202011373407.0A CN202011373407A CN112547435A CN 112547435 A CN112547435 A CN 112547435A CN 202011373407 A CN202011373407 A CN 202011373407A CN 112547435 A CN112547435 A CN 112547435A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1042—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus
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Abstract
The invention relates to the technical field of medical instruments, and particularly discloses an improved injection needle tube surface silicification device which at least comprises a silicone oil coating groove, a steady flow mechanism, an ultrasonic generator, a micro-motion stirring mechanism, a silicone oil supplement tank and a low-temperature box, wherein the steady flow mechanism is arranged at the position of a silicone oil inlet in the silicone oil coating groove, the silicone oil supplement tank is connected with a diluent supplement system, the silicone oil supplement tank is internally provided with a stirring device, the silicone oil supplement tank is connected with the silicone oil coating groove through a pipeline system, and the silicone oil supplement tank is positioned in the low-temperature box. The structure realizes the stability of the liquid level of the silicone oil in the siliconizing process of the injection needle tube by combining the silicone oil coating groove, the silicone oil supplementing tank, the low-temperature environment, the steady flow mechanism, the ultrasonic vibrator and the micro-motion stirring mechanism which are independently arranged, the immersion depth of the needle tube is controllable, and the precision of the siliconizing of the surface of the needle tube is improved.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an improved surface silicification device for a needle tube of an injection needle.
Background
The injection needle needs to pierce the skin of the human body and enter into the subcutaneous tissue, or muscle, or blood vessel, and the pricking feeling in the process is relatively strong. In order to solve the problem of strong pricking feeling of the injection needle, in the prior art, the surface of the injection needle tube is usually subjected to silicification (silicone oil coating) to enhance the lubricity of the surface of the injection needle tube, so that the pricking feeling in the pricking process is reduced.
In the siliconizing method for the needle tube of the injection needle in the prior art, the needle tube is immersed in the silicone oil, and simultaneously the air is blown into the needle tube, so that the effect that a silicone oil film is formed on the outer surface of the needle tube, and the silicone oil is not adhered to the inner wall of the needle tube, thereby not causing the blockage of the needle hole is achieved.
Because when the needle tubing immerses silicone oil, there is the action of blowing, consequently can bring the phenomenon of silicone oil foaming and the undulant phenomenon of silicon oil liquid surface, foaming and liquid surface undulant can all make the needle tubing immerse the degree of depth of silicone oil and change, or dark or shallow, immerse other parts that can pollute medical instrument too deeply, immerse too shallowly then can make the needle tubing lubricated not enough, bring the sense of pain when puncturing the human body.
In addition, the silicone oil with good lubricating effect has high viscosity, and in order to enable the silicone oil with high viscosity to uniformly form a layer of film on the surface of the needle tube, the method in the prior art is to dilute the silicone oil by using a diluent and then infiltrate the needle tube, so that the diluent on the needle tube can be volatilized quickly, and only the silicone oil is left on the surface of the needle tube.
However, the above method also has certain defects: when the diluted silicone oil is placed in a silicone oil coating tank, the diluted silicone oil can continuously volatilize, so that the concentration of the silicone oil is increased, the viscosity is increased, the liquid level is reduced, and the soaking effect is influenced if the silicone oil is not treated, so that the diluent needs to be automatically supplemented into the silicone oil coating tank at regular time.
Usually, supply the diluent and adopt the force pump, through the pipeline with the diluent pump in the silicon oil groove, need stir after supplying the diluent moreover, let concentration in the silicon oil groove even, can bring the surge for liquid in the silicon oil groove like this, the liquid level changes to influence the depth of immersion of needle tubing.
Disclosure of Invention
The invention aims to solve the technical problems of eliminating bubbles as much as possible and reducing the liquid level height change of silicon oil in the process of siliconizing the surface of the needle tube of the injection needle.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: an improved siliconizing device for the surface of the needle tube of an injection needle, at least comprising:
the bottom of the silicone oil coating groove is provided with a silicone oil liquid inlet and a silicone oil liquid outlet;
the flow stabilizing mechanism is arranged at the position of the silicone oil inlet in the silicone oil coating groove;
the ultrasonic wave generator is arranged on the silicone oil coating groove, and the frequency of sound waves generated by the ultrasonic wave generator is 30 KHz-50 KHz;
the micro-motion stirring mechanism comprises at least one stirring wheel arranged in the silicone oil coating tank and a stirring motor arranged outside the silicone oil coating tank and connected with the stirring wheel;
the silicone oil supplementing tank is connected with a diluent supplementing system, a stirring device is arranged in the silicone oil supplementing tank, and the silicone oil supplementing tank is connected with the silicone oil coating tank through a pipeline system; and
the silicone oil replenishing tank is positioned in the low-temperature box, and the temperature in the low-temperature box is 0-10 ℃.
In a preferred embodiment, the flow stabilizing mechanism is provided with a flow stabilizing cavity, the silicon oil inlet is positioned in the flow stabilizing cavity, and a flow stabilizing cavity liquid outlet communicated with the silicon oil coating groove is arranged at a position of the flow stabilizing cavity far away from the silicon oil inlet.
The flow stabilizing mechanism comprises a vertically-arranged wavy flow stabilizing plate and a cover plate covering the top of the flow stabilizing plate, the bottom of the flow stabilizing plate is connected with the bottom of the silicone oil coating groove, one end of the flow stabilizing plate is connected with the side wall of the silicone oil coating groove close to the silicone oil inlet, and the other end of the flow stabilizing plate extends to the liquid outlet of the flow stabilizing cavity.
In a preferred embodiment, the flow stabilization plate comprises a first part and a second part, the first part and the second part form a first flow stabilization cavity part and a second flow stabilization cavity part respectively, wherein the silicone oil inlet is located in the first flow stabilization cavity part, and the volume of the first flow stabilization cavity part is larger than that of the second flow stabilization cavity part.
In a preferred embodiment, the junction position of the first flow stabilization cavity part and the second flow stabilization cavity part forms a necking, and the flow area of the necking is smaller than that of the liquid outlet of the flow stabilization cavity.
In a preferred embodiment, the cross-sectional area of the first flow stabilization cavity part gradually decreases from the position of the silicone oil inlet to the necking position.
In a preferred embodiment, a maximum cross-sectional area position is arranged in the second flow stabilization cavity part, and the cross-sectional area of the second flow stabilization cavity part gradually increases from the position of the reduced position to the position of the maximum cross-sectional area and gradually decreases from the position of the maximum cross-sectional area to the liquid outlet of the flow stabilization cavity.
In a preferred embodiment, the micro-motion stirring mechanisms are provided with a pair of positions which are distributed in the silicone oil coating tank and are close to two ends, the stirring wheel of one micro-motion stirring mechanism is close to the position of the liquid outlet of the steady flow cavity, the rotating speeds of the stirring wheels of the two micro-motion stirring mechanisms are the same, and the rotating directions are opposite.
In a preferred embodiment, the rotation speed of the stirring wheel is 50rpm to 200 rpm.
In a preferred embodiment, a control box is arranged on the pipeline system, and at least a flow sensor and a temperature sensor are installed in the control box.
Compared with the injection needle tube surface siliconizing device in the prior art, the injection needle tube surface siliconizing device improved by the embodiment has the following beneficial effects:
(1) the silicone oil coating tank and the silicone oil replenishing tank are respectively and independently arranged, wherein the silicone oil replenishing tank is connected with a diluent replenishing system, a diluent is directly replenished in the silicone oil replenishing tank and is fully and uniformly stirred in the silicone oil replenishing tank, and the silicone oil mixed with the diluent is directly conveyed to the silicone oil coating tank.
(2) Wherein the silicone oil supplement tank is positioned in the low-temperature box, so that the silicone oil is kept at 0-10 ℃, and the silicone oil is in a low-temperature state, and has the advantages that:
firstly, at low temperature, the elasticity of bubbles is reduced, the stability of the bubbles is reduced, the bubbles are more easily broken, and the defoaming efficiency in the silicification process is enhanced;
secondly, at low temperature, the volatilization of the silicone oil diluent is slowed down, the frequency of diluent supplement can be reduced, and the influence on the liquid level in the silicone oil coating tank is correspondingly reduced;
and the silicone oil is inflammable, and the low temperature is also beneficial to reducing the possibility of combustion.
(3) The flow stabilizing mechanism is arranged at the silicone oil inlet of the silicone oil coating groove, so that the flow impact generated when the silicone oil is conveyed from the silicone oil replenishing tank to the silicone oil coating groove can be effectively relieved, the liquid level of the silicone oil coating groove is kept stable, and the phenomenon that the liquid level surges due to the flow impact generated by conveying the silicone oil is avoided.
(4) The bubble very first time that the sound wave that the ultrasonic wave produced sends out the oscillator and blow when processing needle tubing silicification carries out the defoaming and handles to combine the lower temperature of silicone oil, further promoted the efficiency of defoaming, avoid leading to the silicon oil liquid level to change because of a large amount of bubbles.
(5) The micro-motion stirring mechanism is arranged to uniformly mix newly supplemented silicone oil with the original silicone oil in the silicone oil coating tank, and the stirring fluctuation is small, so that the influence on the liquid level change is small.
In a word, in the embodiment, through the combination of the independently arranged silicone oil coating tank, the silicone oil supplementing tank, the low-temperature environment, the flow stabilizing mechanism, the ultrasonic wave vibration generator and the micro-motion stirring mechanism, the stability of the liquid level of the silicone oil in the siliconizing process of the injection needle tube is realized, the immersion depth of the needle tube is controllable, and the precision of the siliconizing of the surface of the needle tube is improved.
Drawings
FIG. 1 is a view showing a state of use of the siliconizing device for the needle tube surface of the improved injection needle of the present embodiment in the siliconizing process;
FIG. 2 is a schematic structural view of the needle tube surface siliconizing device of the modified injection needle of the present embodiment;
FIG. 3 is a schematic structural diagram of a silicone oil coating tank and its related structure in the modified siliconizing device for the surface of the needle tube of the injection needle according to this embodiment;
FIG. 4 is a schematic perspective view of the structure shown in FIG. 3;
FIG. 5 is a schematic structural view of a silicone oil coating bath and a flow stabilizing mechanism in the present embodiment;
FIG. 6 is a schematic partial structure diagram of a flow stabilizing mechanism in this embodiment;
fig. 7 is a schematic structural diagram of the cryobox and the silicone oil replenishing tank in this embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, integrally connected, or detachably connected; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art will understand the specific meaning of the above terms in the present invention in specific situations.
As shown in fig. 1, the system for siliconizing the surface of a needle tube includes a siliconizing device 100 for carrying silicone oil and an operating mechanism 200 for immersing the needle tube in the silicone oil for siliconizing, and the operating mechanism 200 is not the invention of the present application, and will not be described herein again.
The improved siliconizing device for the surface of the needle tube of the injection needle provided by the embodiment comprises a silicone oil coating tank 10, a flow stabilizing mechanism 20, an ultrasonic wave generator 40, a micro-motion stirring mechanism, a low-temperature box 50 and a silicone oil replenishing tank 60, as shown in fig. 2-4 and 7.
As shown in fig. 5, a silicone oil inlet 11 and a silicone oil outlet 12 are arranged at the bottom of the silicone oil coating tank 10, and the silicone oil inlet 11 and the silicone oil outlet 12 are distributed at two ends of the silicone oil coating tank 10, so that the silicone oil inlet and the silicone oil outlet are not affected by each other as much as possible during the dynamic change of the silicone oil input and the silicone oil output, and the stability of the liquid level of the silicone oil is maintained.
Preferably, as shown in fig. 3, the bottom of the silicone oil coating tank 10 is provided with a liquid inlet joint 13 connected to the silicone oil liquid inlet 11 and a liquid discharge joint 14 connected to the silicone oil liquid discharge port 12 to facilitate connection of the piping system. The drainage system connected to the drainage connector 14 is not shown in this embodiment, and belongs to the prior art, and is not described herein.
As shown in fig. 7, in the present embodiment, a silicone oil replenishing tank 60 is placed in a low-temperature box 50, the low-temperature box 50 includes a box body 501 and a box cover 502, the temperature in the low-temperature box is maintained at 0 ℃ to 10 ℃, and a refrigeration system configured by the low-temperature box is a conventional technology and is not described herein again.
As a special point of the present embodiment, a diluent replenishing system (belonging to the conventional technology and not shown in the figure) is connected to the silicone oil replenishing tank 60, and a stirring device is provided in the silicone oil replenishing tank 60, so that the silicone oil diluent and the silicone oil can be sufficiently and uniformly stirred in the silicone oil replenishing tank 60.
In this embodiment, the silicone oil replenishing tank 60 is connected to the silicone oil coating tank 10 through a piping system 52 to deliver the uniformly mixed silicone oil into the silicone oil coating tank 10.
Preferably, as shown in fig. 2, the piping system of the present embodiment is provided with a control box 51, and a flow sensor and a temperature sensor are installed in the control box 51 to monitor and control the flow rate of the silicone oil flowing through the piping system and monitor the temperature of the silicone oil.
As shown in fig. 1 to 4, an ultrasonic wave generator 40 is connected to the silicone oil coating bath 10 in this embodiment, and the ultrasonic wave generated by the ultrasonic wave generator 40 is used to efficiently defoam bubbles generated by the air blowing during the siliconizing process. Because the temperature of silicon oil is lower in this embodiment for bubble elasticity reduces, and bubble stability can descend, and the bubble breaks more easily, passes through the ultrasonic wave defoaming under this low temperature environment, and its defoaming efficiency is very high, makes the bubble break almost in the twinkling of an eye that produces the bubble, has eliminated the influence that the bubble is undulant to the liquid level.
In this embodiment, the frequency of the ultrasonic wave generated by the ultrasonic wave generator 40 may be selected from a range of 30KHz to 50KHz, preferably 40 KHz.
In the present embodiment, as shown in fig. 2 to 4, a pair of micro-motion stirring mechanisms including a stirring wheel 30 disposed in the silicone oil coating tank 10 and a stirring motor 31 disposed outside the silicone oil coating tank and connected to the stirring wheel 30 are provided. Wherein, the stirring motor 31 is a low power motor and is fixed on the bracket 70.
In this embodiment, the rotational speed of the micro-motion stirring mechanism is very low, the stirring amplitude is small, and the rotational speed of the stirring wheel 30 is usually 50rpm to 200 rpm. Although the stirring amplitude of the micro-motion stirring mechanism is small, because the silicone oil input from the silicone oil replenishing tank 60 is uniformly mixed with the diluent, the concentration of the diluent in the original silicone oil coating tank 10 is reduced, but the concentration of the diluent is not greatly different from that of the newly replenished and input silicone oil, the silicone oil with the concentration of the two diluents is uniformly mixed by stirring with small amplitude, and the change of the liquid level of the silicone oil is not obviously influenced.
In this embodiment, as shown in fig. 4, preferably, a pair of micro-motion stirring mechanisms is distributed in the silicone oil coating tank at positions close to both ends, where the stirring wheel 30 of one micro-motion stirring mechanism is close to the position of the steady flow cavity liquid outlet 233, and the rotation speeds of the stirring wheels 30 of the two micro-motion stirring mechanisms are the same and the rotation directions are opposite, so that the surging generated by the two stirring wheels 30 can be mutually offset. Moreover, the stirring wheel 30 close to the position of the liquid outlet 233 of the steady flow cavity can also counteract the impact of partial input silicone oil. In a word, the arrangement of the micro-motion stirring mechanism also plays a positive role in stabilizing the liquid level of the silicone oil.
The core of the invention of this embodiment is that a steady flow mechanism 20 is provided at the position of the silicone oil inlet 11 to eliminate the impact generated by the silicone oil input from the pipeline system 52 as much as possible, so as to avoid the fluctuation of the liquid level in the silicone oil coating tank 10 due to the flow impact.
In this embodiment, as shown in fig. 5, the flow stabilizing mechanism 20 includes a vertically arranged wavy flow stabilizing plate 21 and a cover plate 22 covering the top of the flow stabilizing plate 21, wherein the bottom of the flow stabilizing plate 21 is connected to the bottom of the silicone oil coating tank 10, and one end of the flow stabilizing plate 21 is connected to the side wall of the silicone oil coating tank near the silicone oil inlet 11. In this embodiment, the flow stabilizing plate 21, the cover plate 22, the bottom of the silicone oil coating groove, and the corresponding groove wall form a flow stabilizing cavity 23, and the silicone oil inlet 11 is located in the flow stabilizing cavity 23. A steady flow cavity liquid outlet 233 communicated with the silicone oil coating groove is arranged at the position of the steady flow cavity 23 far away from the silicone oil inlet 11, and one end of the steady flow plate 21 far away from the silicone oil inlet 11 forms a free end and extends to the steady flow cavity liquid outlet 233.
Preferably, in this embodiment, as shown in fig. 6, the flow stabilizer 21 includes a first portion 211 and a second portion 235, and the first portion 211 and the second portion 235 are continuous. Wherein the first portion 211 forms a first flow stabilization cavity portion 231 and a second flow stabilization cavity portion 232 correspondingly, and the first flow stabilization cavity portion 231 and the second flow stabilization cavity portion 232 are continuous. The silicone oil inlet 11 is located in the first flow stabilization cavity part 231, and the volume of the first flow stabilization cavity part 231 is larger than that of the second flow stabilization cavity part 232.
And the junction position of the first flow stabilization cavity part 231 and the second flow stabilization cavity part 232 forms a necking 234, and the flow area of the necking 234 is smaller than that of the flow area of the flow stabilization cavity liquid outlet 233. Wherein, the cross-sectional area of the first flow stabilization cavity part 231 is gradually reduced from the position of the silicon oil inlet 11 to the position of the necking 234; the second constant flow chamber portion 232 is provided with a maximum cross-sectional area position 235 therein, and the cross-sectional area of the second constant flow chamber portion 232 gradually increases from the reduced opening 234 to the maximum cross-sectional area position 235 and gradually decreases from the maximum cross-sectional area position 235 to the constant flow chamber outlet 233.
In the embodiment, a gradually-changing flow stabilizing cavity structure is formed based on the special structure of the wavy flow stabilizing plate, and the flow impact of input silicone oil is eliminated as much as possible through the special design of the structure, so that the liquid level in the silicone oil coating tank is prevented from being fluctuated. In this embodiment, when the silicone oil enters the first flow stabilizing cavity from the silicone oil inlet, a large impact is generated, and the impact impacts the inside of the first portion of the flow stabilizing plate and the cover plate, so that the impact is isolated from the silicone oil in the silicone oil coating groove. After the first wave is blocked, the silicone oil flows to the necking, and the liquid flow is guided due to the gradually reduced cross-sectional area, and the gradually changing inner wall of the first part continuously absorbs the impact of the liquid flow. When the liquid flow passes through the necking part, the pressure generated by convergence of the necking part is released because the cross sectional area of the second flow stabilization cavity part is gradually increased from the necking part to the position with the maximum cross sectional area. Then, because the cross-sectional area of the second flow stabilization cavity part is gradually reduced from the maximum cross-sectional area position to the liquid outlet of the flow stabilization cavity, the micro impact generated by pressure release is absorbed by the inner wall of the second part between the maximum cross-sectional area position and the liquid outlet of the flow stabilization cavity, so that the silicone oil flowing out of the liquid outlet of the flow stabilization cavity hardly generates flow impact on the silicone oil in the silicone oil coating groove, and the silicone oil surface is relatively stable and hardly fluctuates.
In the embodiment, the surface silicification process of the injection needle tube with stable silicon oil liquid surface and high defoaming efficiency in the silicon oil coating tank is finally realized through the combination of various technical means.
In conclusion, the above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An improved siliconizing device for the surface of the needle tube of an injection needle, characterized in that it comprises at least:
the silicone oil coating device comprises a silicone oil coating groove (10), wherein a silicone oil liquid inlet (11) and a silicone oil liquid outlet (12) are formed in the groove bottom of the silicone oil coating groove;
the flow stabilizing mechanism (20) is arranged at the position of the silicone oil inlet in the silicone oil coating groove;
an ultrasonic wave generator (40) which is arranged on the silicone oil coating groove and generates sound wave with the frequency of 30 KHz-50 KHz;
the micro-motion stirring mechanism comprises at least one stirring wheel (30) arranged in the silicone oil coating tank and a stirring motor (31) arranged outside the silicone oil coating tank and connected with the stirring wheel;
the silicone oil replenishing tank (60) is connected with a diluent replenishing system, a stirring device is arranged in the silicone oil replenishing tank, and the silicone oil replenishing tank is connected with the silicone oil coating tank through a pipeline system (52); and
the silicone oil replenishing tank is positioned in the low-temperature box (50), and the temperature in the low-temperature box is 0-10 ℃.
2. A silicification device for the surface of injection needle tube according to claim 1, characterized in that said flow stabilizing means is provided with a flow stabilizing cavity (23) and said silicone oil inlet is located in said flow stabilizing cavity, and said flow stabilizing cavity is provided with a flow stabilizing cavity outlet (233) communicating with said silicone oil coating slot at a position away from said silicone oil inlet.
3. A silicification device for the surface of a needle tube of an injection needle according to claim 2, characterized in that the flow stabilizing mechanism comprises a vertically arranged wavy flow stabilizing plate (21) and a cover plate (22) covering the top of the flow stabilizing plate, the bottom of the flow stabilizing plate is connected with the bottom of the silicone oil coating groove, one end of the flow stabilizing plate is connected with the side wall of the silicone oil coating groove close to the silicone oil inlet, and the other end extends to the liquid outlet of the flow stabilizing cavity.
4. A needle shaft siliconizing device according to claim 3, characterized in that the flow stabilizer comprises a first portion (211) and a second portion (212), the first portion forming a first flow stabilizer chamber portion (231) and a second flow stabilizer chamber portion (232) respectively, wherein the silicone oil inlet is located in the first flow stabilizer chamber portion and the volume of the first flow stabilizer chamber portion is larger than the volume of the second flow stabilizer chamber portion.
5. A needle bore siliconizing device according to claim 4, characterized in that the junction of the first cavity portion (231) and the second cavity portion (232) forms a constriction (234) and the flow area of the constriction (234) is smaller than the flow area of the flow chamber outlet (233).
6. A silicidation arrangement for the surfaces of the barrel of an injection needle according to claim 5, characterised in that the cross-sectional area of said first cavity portion (231) tapers from the point where the silicone fluid inlet is located to the constriction (234).
7. A needle bore surface siliconizing device for injection needles according to claim 5 or 6, characterized in that a maximum cross-sectional area position (235) is provided in said second cavity portion (232), and the cross-sectional area of said second cavity portion (232) increases from the constriction (234) to the maximum cross-sectional area position (235) and decreases from the maximum cross-sectional area position (235) to the cavity outlet (233).
8. A silicification device for the surface of a needle tube of a syringe needle according to any one of claims 1 to 7, characterized in that the micro-motion stirring mechanism is provided with a pair of stirring wheels which are distributed in the silicone oil coating tank near the two ends, wherein the stirring wheel of one micro-motion stirring mechanism is near the liquid outlet of the steady flow cavity, and the stirring wheels of the two micro-motion stirring mechanisms rotate at the same speed and rotate in opposite directions.
9. A device for siliconizing the surface of a needle tube according to claim 8, wherein the rotation speed of the stirring wheel is 50rpm to 200 rpm.
10. Siliconizing device for the surfaces of injection needles and needle cannulae according to any of claims 1 to 9, characterized in that a control box (51) is arranged on the piping system, in which control box at least a flow sensor and a temperature sensor are arranged.
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| CN202011373407.0A CN112547435B (en) | 2020-11-30 | 2020-11-30 | Improved surface silicification device for injection needle tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116603702A (en) * | 2023-05-30 | 2023-08-18 | 滨州鸿博铝业科技有限公司 | Efficient coating production method of non-sticking household foil |
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2020
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