KR20200100346A - Method for manufacturing painless injection needle and the painless injection needle - Google Patents

Abstract

The present invention relates to a manufacturing method of a painless injection needle and a painless injection needle thereof and, more specifically, to a method of manufacturing a painless injection needle generally having an outer diameter of 0.2 mm or lower by a progressive stamping die process and a plating process, and a painless injection needle manufactured by the same. The manufacturing method of a painless injection needle comprises: (a) a step in which a front end becomes a sharp plate by first temporarily notching a cutting shape from an edge of a thin plate; (b) a step of forging the plate which has undergone the first temporary notching to reduce the thickness of the plate and increase the strength by work hardening; (c) a step of performing second main notching of cutting a shape of a desired size from an area widened by the forging in step (b); (d) a step of chamfering and rounding a sharp tapered portion of the sharp front end cut by the second main notching in step (c); and (e) a step of forming the chamfered plate into a cylindrical shape.

Description

Painless injection needle manufacturing method and the painless injection needle {METHOD FOR MANUFACTURING PAINLESS INJECTION NEEDLE AND THE PAINLESS INJECTION NEEDLE}

The present invention relates to a painless injection needle manufacturing method and the painless injection needle, and more particularly, a painless injection needle having an outer diameter of 0.2 mm or less in general is manufactured by a progressive stamping die process and a plating process. It relates to a method and a painless injection needle manufactured thereby.

In general, a syringe is a tool used by a nurse or doctor to inject medicine directly into a patient's body.

A typical syringe has one injection needle, and the medicine in the cylinder is injected into the patient by pressing the piston.

In particular, in the case of diabetic patients, insulin treatment is being performed to control blood sugar. Depending on the symptoms, several injections per day are required, and at this time, injections must be made using a general syringe (a syringe made of only an external cylinder with a needle and a push rod). Of course, there is a difficulty in having to inject an injection into one's own body.

In addition, even in the case of general patients, when they want to inject themselves or inject children with extreme movements, there is considerable difficulty in delivering injections without excellent injection technology, and in the case of thick needles, when penetrating the skin There is a problem that cannot solve the pain.

Accordingly, a painless injection needle (painless injection needle) has been developed and can be used, for example, for anesthesia by a dentist or the like.

If you put a small amount of anesthetic into a very thin needle and stick it into the gum, if you don't feel any pain around the puncture, you can inject the anesthetic solution there and start treatment.

The development of such painless needles is a global trend, and major domestic medical device manufacturers have developed and exported needles that can inject drugs with a diameter of 0.18 mm.

Many researchers and technicians around the world are constantly working on research on painless injection needles that can inject drugs, and special technologies such as laser processing are used to manufacture 0.18 mm needles (needles that can collect blood or inject drugs). I am succeeding.

However, in the case of a painless injection needle, the hole (inner diameter) of the needle is narrowed, making it difficult to pass the drug, and it takes too much time to inject the necessary drug into the body, which increases the patient's pain.

In the prior art, such a painless injection needle is made into a cylinder 22 having an inner diameter by pressing (S10) a thin and wide flat plate 20 as shown in FIGS. 1 and 2, and welding (S11) both joints After bonding, bending correction (S12), electrolytic polishing (S13), and then grinding (S14) through the insertion part (blade part) three times, a needle with a sharp tip (24) Was prepared.

However, in the manufacture of such a conventional painless injection needle, the manufacturing equipment is expensive, the process such as grinding three times is complicated, and the manufacturing is difficult.

In addition, it is necessary to secure a side wall thickness of 0.05mm or more in order to secure strength to prevent bending when the skin is inserted, which inevitably has a problem that the inner diameter is reduced.

Publication No. 10-2016-0067277 (published on June 14, 2016)

The present invention was conceived to solve the above-described problems, and by manufacturing a painless injection needle by the progressive mold method and the plating method, the strength of the material is reinforced by the forging process of the progressive mold method to prevent bending when inserted into the skin. In addition, since the inner diameter is increased by the thinner thickness in the forging process, the flow of the chemical is improved, and by filling the joint with a strong material such as paradum or cobalt by plating, the elasticity and strength can be further increased, as well as the manufacturing process. An object thereof is to provide a method of manufacturing a painless injection needle that is simple and easy to manufacture, and a painless injection needle thereof.

A method for manufacturing a painless injection needle according to an embodiment of the present invention for achieving the above object comprises the steps of: (a) making the tip of a thin plate a sharp plate by primary temporary notching that cuts out a shape from the edge of the thin plate;

(b) reducing the thickness of the plate by forging the first tentatively notched plate material and increasing the strength by working hardening;

(c) performing secondary bone notching in which the larger area by forging in step (b) is cut out to the original dimensions;

(d) chamfering the pointed tapered portion of the sharp tip cut by the secondary bone notching in step (c) and rounding it; And

(e) forming the chamfered plate into a cylindrical shape;

Consists of including.

In addition, after step (e),

(f) plating the surface of the cylindrical needle to fill the joint with plating; It is characterized in that to perform more.

In addition, the step (f),

(f-1) a degreasing step of removing fats and oils attached to the surface of the injection needle,

(f-2) a chemical polishing process for obtaining a smooth glossy surface on the surface by immersing the injection needle subjected to the degreasing process in a solution of various compositions,

(f-3) a nickel strike process for improving the adhesion of the injection needle subjected to the chemical polishing process,

(f-4) a nickel plating process in which a nickel layer is coated on the surface of the needle that has undergone the nickel strike process,

(f-5) a palladium or cobalt plating process in which a palladium layer or cobalt layer is coated again on the surface of the needle coated with the nickel layer,

(f-6) a gold plating process in which a gold layer is again coated on the surface of the injection needle coated with the palladium layer or cobalt layer, and

(f-7) sealing process of sealing micropores of the anodized film formed on the surface of the injection needle,

It characterized in that it comprises a.

In addition, the thickness of the nickel plating layer is 0.5 ~ 5.0um, the thickness of the palladium layer or cobalt layer is 0.03 ~ 1.0um, the thickness of the gold plating layer is characterized in that 0.025um or more.

In addition, the nickel plating process is characterized in that the injection needle is immersed six times in the nickel plating solution.

In the step (b), a plate having a thickness of 0.02 to 0.03 t is forged into a plate having a thickness of 0.01 to 0.02 t, and in step (e), an outer diameter is 0.10 to 0.20 mm, and an inner diameter is a cylindrical needle of 0.06 to 0.16 mm. It is characterized in that it is molded into.

A painless injection needle according to an embodiment of the present invention is a painless injection needle manufactured by the above-described method;

An injection needle body coupled to an end of the syringe cylinder, an insertion portion having an inner diameter relatively smaller than the inner diameter of the injection needle body and sharply formed so that a tip portion penetrating the skin during injection is biased toward one side, the injection needle body and An injection needle formed integrally between the insertion portions and consisting of an intermediate portion having a uniformly tapered shape,

An injection needle body coupled to an end of the syringe cylinder, an insertion portion having an inner diameter relatively smaller than the inner diameter of the injection needle body and sharply formed so that a tip portion penetrating the skin during injection is biased toward one side, and the injection needle body An injection needle formed integrally between the and the insertion portion and consisting of an intermediate portion tapered to one side,

An injection needle integrally formed with an intermediate portion coupled to the end of the syringe cylinder and having a uniformly tapered shape, and an insertion portion sharply formed so that the tip portion penetrating the skin during injection is biased toward one side,

An injection needle coupled to an end of the syringe cylinder and integrally formed with an intermediate portion having a tapered shape to be biased toward one side, and an insertion portion which is sharply formed so that the tip portion penetrating the skin during injection is biased toward one side,

Among the injection needles provided with an insertion portion, the rear end portion is coupled to the end of the syringe cylinder and the tip portion which penetrates the skin during injection is sharply formed to be biased toward one side,

It is characterized in that any one or more injection needles.

According to the means for solving the above-described problem, by manufacturing a painless injection needle by the progressive mold method and the plating method, the strength of the material is reinforced by the forging process of the progressive mold method to prevent bending when inserted into the skin, and in the forging process. As the inner diameter becomes larger as the thickness becomes thinner, the flow of chemicals is improved, and by filling the joints with a strong material such as paradum or cobalt by plating, not only can the elasticity and strength be increased, but the manufacturing process is simple, so manufacturing is easy. It's easy.

1 is a process chart showing the manufacturing process of a conventional painless injection needle.
2 is a schematic diagram showing a manufacturing process of a conventional painless injection needle.
3 is a flow chart showing a manufacturing process of a painless injection needle according to an embodiment of the present invention.
4 is a detailed process chart of the plating shown in FIG. 3.
5 is a schematic diagram showing a manufacturing process of a painless injection needle according to an embodiment of the present invention.
6A and 6B are diagrams illustrating a first tentative notching process and a second bone notching process shown in FIG. 3.
7A to 7E are exemplary views of a painless injection needle according to an embodiment of the present invention.
Fig. 8 is a photograph of a painless injection needle manufactured according to an embodiment of the present invention instead of drawing.

Hereinafter, with reference to the accompanying drawings with respect to an embodiment of the present invention will be described the configuration and operation.

It should be noted that the same components among the drawings are denoted by the same reference numerals and reference numerals as much as possible even if they are indicated on different drawings.

In the following description of the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

In addition, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

3 is a flowchart showing a manufacturing process of a painless injection needle according to an embodiment of the present invention, and FIG. 5 is a schematic diagram showing a manufacturing process of a painless injection needle according to an embodiment of the present invention.

As shown in Figure 3, the manufacturing process of the painless injection needle according to the embodiment of the present invention includes notching (S30), forging (S32), chamfering (S34), forming (S36) and plating process (S38). .

First, stainless steel, for example, a thin plate made of SUS material for medical use (thickness 0.02 ~ 0.03t) 50 by notching (S30) cutting out various shapes from the edge of the plate material 52 with a sharp tip Make it possible.

That is, the notching process is an operation of punching a plate material in a predetermined outline in a progressive mold. As shown in Figs. 6A and 6B, a part of the plate material is sheared multiple times by the molds 60a, 60b, and the plate material 50a, 50b ) To form the outline.

This notching process may consist of a first false notching performed before forging (FIG. 6A) and a second bone notching performed after forging (FIG. 6B).

Next, forging (S32) a notched plate material with a thickness of 0.02 to 0.03t, for example, to make a plate with a thickness of 0.01 to 0.02t to increase the strength of the material.

In other words, forging is a processing method to make a desired shape by tapping and thinning the thickness. If a SUS plate is forged at least once, the material becomes strong due to work hardening.

Next, as described above, secondary bone notching is performed to cut out the shape of the larger area according to the original dimensions by the forging.

Then, the sharp tapered portion of the sharp tip cut by the secondary bone notching is chamfered (S34) and rounded.

Next, forming (S36) of rolling the chamfered plate and forming it into a cylindrical shape is performed.

Cylindrical injection needle 54 having a sharp outer diameter of 0.10 to 0.18 mm at the tip portion shown in Fig. 5 is formed by such two notching (Fig. 6A, Fig. 6B) and forming processes.

Then, the cylindrical needle is filled with a cylindrical joint with nickel (Ni) plating (S38), and the strength is increased again.

The plating refers to thinly coating the surface of an object with another material in order to make the surface state of an object more useful than the property of the present material.

By such a process, as shown in FIG. 8, the thickness is thin (0.02mm) and the outer diameter is 0.18mm, so that no pain is felt when inserted, but the inner diameter is as wide as 0.14mm, so that an injection needle having good liquid flow properties can be manufactured.

For example, if the outer diameter of a painless injection needle that has been implemented with the technology so far is 0.18mm, the inner diameter is 0.07mm, whereas according to the present invention, when the outer diameter is 0.18mm, the inner diameter is doubled to 0.14mm, so the liquid flow is good. .

In addition, according to the present invention, it is possible to implement up to an outer diameter of 0.10mm and an inner diameter of 0.06mm.

4 is a detailed process chart of the plating shown in FIG. 3.

As shown in Figure 4, the plating is degreasing (S40), chemical polishing (S41), nickel strike (S42), nickel plating (S43), palladium or cobalt plating (S44), gold plating (S45), sealing ( S46) and a drying process (S47).

A large number of substances such as oxides and oils may adhere to the surface of the needle to be processed as shown in FIG. 3, and if these remain on the surface, this residue will interfere with the subsequent surface processing of the needle. A process to remove is necessary.

Degreasing (cleaning) (S40) is a process of removing fats and oils while removing these residues.

At this time, degreasing consists of ultrasonic degreasing and electrolytic degreasing, and in the case of ultrasonic degreasing, the degreasing agent concentration is 50-60g/L, the temperature is 50-60℃, and in the case of electrolytic degreasing, the degreasing agent concentration is 50-60g/L, and the temperature is 50~ 60℃, the current is preferably 20.5±5A

Chemical polishing (S41) is polishing to obtain a smooth glossy surface on the surface by immersing the injection needle that has undergone the degreasing step (S40) in a solution of various compositions for a short time.

At this time, the concentration of the chemical polishing agent is preferably from 60% to 100%.

Nickel Strike (S42) is a method used to improve adhesion.Since a passivation film is usually applied to SUS 304 material, if nickel is directly plated, adhesion will be poor. To prevent this, thin the plating layer with good adhesion with base plating and then nickel. Plating.

At this time, the nickel chloride concentration is 180 to 220 g / L, the hydrochloric acid concentration is 80 to 120 g / L, the temperature is preferably room temperature.

Nickel plating (S43) is to coat a nickel layer on the surface of a needle that has undergone a nickel strike process, and is made by immersing the needle in a nickel plating solution for about 6 times, and the plating thickness is preferably 0.5 to 5.0 μm.

At this time, the concentration of nickel sulfamate is 600~850g/L, the concentration of nickel chloride is 8~15g/L, the concentration of Bongsan is 35~50g/L, the additive is 15~30ml/L, the supplemental amount cycle is 380ml/4hr, the pH is 4.0 to 5.0, the temperature is preferably 50 to 60 ℃, the current is 20 to 25A.

Palladium or cobalt plating (S44) is a process of immersing the needle in a palladium solution or cobalt plating solution by applying a palladium layer or a cobalt layer again on the surface of a needle coated with a nickel layer, and the plating thickness is 0.03um~ 1.0um is preferred.

At this time, the palladium concentration is preferably 8 to 10 g/L, the cobalt concentration is 14 to 18 g/L, the PH is 5 to 7, and the specific gravity is 10 to 13 Be.

Gold plating (S45) is a process of immersing the injection needle in a gold plating solution once again by coating a gold layer on the surface of the injection needle coated with a palladium layer or a cobalt layer, and the plating thickness is preferably 0.025um or more.

At this time, it is preferable that the gold concentration is 4.0 to 6.0 g/L, the additive is 10 to 40 ml/L, the pH is 4.0 to 5.0, the temperature is 50 to 60°C, the specific gravity is 10 to 15 Be, and the current is 3 to 5.2 A.

Sealing is the process of sealing micropores in the anodized film and changing various properties such as corrosion resistance.

At this time, the additive (for example, SEALING-691) is 10 ~ 40ml / L, the temperature is preferably 40 ~ 50 ℃.

After that, plating is completed through a hot water rinse at 60~70℃ and a drying process in a dryer at 90~120℃.

Of course, a water washing process of washing with water is performed between each of the above processes.

When the joint is filled with such a plating solution containing nickel, the strength is further improved by the plating solution.

The reason why the thickness of the nickel plated layer is limited to 0.5~5.0um, the thickness of the palladium layer or cobalt layer is 0.03~1.0um, and the thickness of the gold plated layer is 0.025um or more. Because you lose.

7A to 7E are exemplary views of a painless injection needle according to an embodiment of the present invention.

The painless injection needle 100 shown in FIG. 7A has an internal diameter 110 and an injection needle body 102 coupled to the end of the syringe cylinder, and has an internal diameter relatively smaller than the internal diameter of the injection needle body 102. The insertion portion 106 that is sharply formed so that the tip portion 108 penetrating the skin during injection is biased toward one side, and the injection needle body 102 and the insertion portion 106 are integrally formed and uniformly tapered It consists of an intermediate portion 104 to do.

The painless injection needle 100 shown in FIG. 7B has an inner diameter 110 and an injection needle body 102 coupled to the end of the syringe cylinder, and has an inner diameter relatively smaller than the inner diameter of the injection needle body 102 The insertion portion 106 that is sharply formed so that the tip portion 108 penetrating the skin during injection is biased toward one side, and the injection needle body 102 and the insertion portion 106 are integrally formed between the injection needle body 102 and the insertion portion 106 and tapered to one side. It consists of an intermediate portion 104 having a true shape.

The painless injection needle 100 shown in FIG. 7C is pointed so that the middle portion 104 that is coupled to the end of the syringe cylinder and has a uniformly tapered shape, and the tip portion 108 penetrating the skin during injection is biased toward one side. The insertion portion 106 is formed integrally.

The painless injection needle 100 shown in FIG. 7D has an intermediate portion 104 coupled to the end of the syringe cylinder and having a tapered shape to be biased toward one side, and a tip portion 108 penetrating the skin during injection. The insertion portion 106 formed as sharp as possible is integrally formed.

The painless injection needle shown in FIG. 7E includes an insertion portion 106 having an end coupled to the end of the syringe cylinder and sharply formed so that the tip portion 108 penetrating the skin during injection is biased toward one side.

Although the technical idea of the present invention has been described above with reference to the accompanying drawings, this is illustrative of a preferred embodiment of the present invention and does not limit the present invention.

In addition, it is a clear fact that anyone of ordinary skill in the art can perform various modifications and imitations without departing from the scope of the technical idea of the present invention.

100: painless injection needle 102: injection needle body
104: middle part 106: insertion part
108: tip 110: inner diameter

Claims (7)

(a) making the tip of the thin plate a sharp plate by primary temporary notching that cuts out the shape from the edge of the thin plate;
(b) reducing the thickness of the plate by forging the first tentatively notched plate material and increasing the strength by working hardening;
(c) performing secondary bone notching in which the larger area by forging in step (b) is cut out to the original dimensions;
(d) chamfering the pointed tapered portion of the sharp tip cut by the secondary bone notching in step (c) and rounding it; And
(e) forming the chamfered plate into a cylindrical shape;
Painless injection needle manufacturing method comprising a. The method of claim 1,
After step (e) above,
(f) plating the surface of the cylindrical needle to fill the joint with plating; Painless injection needle manufacturing method, characterized in that further performing. The method of claim 2,
The step (f),
(f-1) a degreasing step of removing fats and oils attached to the surface of the injection needle,
(f-2) a chemical polishing process for obtaining a smooth glossy surface on the surface by immersing the injection needle subjected to the degreasing process in a solution of various compositions,
(f-3) a nickel strike process for improving the adhesion of the injection needle subjected to the chemical polishing process,
(f-4) a nickel plating process in which a nickel layer is coated on the surface of the needle that has undergone the nickel strike process,
(f-5) a palladium or cobalt plating process in which a palladium layer or cobalt layer is coated again on the surface of the needle coated with the nickel layer,
(f-6) a gold plating process in which a gold layer is again coated on the surface of the injection needle coated with the palladium layer or cobalt layer, and
(f-7) sealing process of sealing micropores of the anodized film formed on the surface of the injection needle,
Painless injection needle manufacturing method comprising a. The method of claim 3,
The thickness of the nickel plating layer is 0.5 ~ 5.0um, the thickness of the palladium layer or the cobalt layer is 0.03 ~ 1.0um, the thickness of the gold plating layer is a painless injection needle manufacturing method, characterized in that 0.025um or more. The method of claim 3,
The nickel plating process is a painless injection needle manufacturing method, characterized in that the injection needle is immersed six times in a nickel plating solution. The method of claim 1,
In step (b), a plate having a thickness of 0.02 to 0.03 t is forged into a plate having a thickness of 0.01 to 0.02 t, and in step (e), the outer diameter is 0.10 to 0.20 mm and the inner diameter is 0.06 to 0.16 mm. Painless injection needle manufacturing method, characterized in that the molding. As a painless injection needle prepared according to any one of claims 1 to 6;
An injection needle body coupled to an end of the syringe cylinder, an insertion portion having an inner diameter that is relatively smaller than the inner diameter of the injection needle body and sharply formed so that a tip portion penetrating the skin during injection is biased toward one side, the injection needle body and An injection needle formed integrally between the insertion portions and consisting of an intermediate portion having a uniformly tapered shape,
An injection needle body coupled to an end of the syringe cylinder, an insertion portion having an inner diameter relatively smaller than the inner diameter of the injection needle body and sharply formed so that a tip portion penetrating the skin during injection is biased toward one side, and the injection needle body An injection needle formed integrally between the and the insertion portion and consisting of an intermediate portion tapered to one side,
An injection needle integrally formed with an intermediate portion coupled to the end of the syringe cylinder and having a uniformly tapered shape, and an insertion portion sharply formed so that the tip portion penetrating the skin during injection is biased toward one side,
An injection needle coupled to an end of the syringe cylinder and integrally formed with an intermediate portion having a tapered shape to be biased toward one side, and an insertion portion which is sharply formed so that the tip portion penetrating the skin during injection is biased toward one side,
Among the injection needles provided with an insertion portion, the rear end portion is coupled to the end of the syringe cylinder and the tip portion which penetrates the skin during injection is sharply formed to be biased toward one side,
Painless injection needle, characterized in that at least one injection needle.

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