A kind of Painless type drawing-in type medical needle and its production technology
Technical field
The present invention relates to medical equipment technical field, and in particular to a kind of Painless type drawing-in type medical needle and its production work
Skill.
Background technology
Normal injection pin type syringe needle being used existing medically drawing-in type medical needle, its syringe needle is pointed, to suffering from more
When person carries out the beautifying medicals such as liposuction, because syringe needle needs to be located in vivo for a long time, pointed needle point easily stabs trouble in vivo
Person, causes inevitable secondary injury, and pointed needle point can also make patient pain's sense intensification in vivo.
The content of the invention
In order to solve the deficiencies in the prior art, of the invention provides a kind of Painless type drawing-in type medical needle and its production
Technique.
The technical solution that the present invention is used is:A kind of Painless type drawing-in type medical needle, including needle body, it is described
Needle body is hollow cylinder, and described needle body side is provided with the top of pin hole, described needle body provided with the syringe needle with human contact, institute
The syringe needle stated is smooth curved surface, and being also uniformly provided with described needle body some is used to indicate needle body insertion human depth's
Graduation mark.
Described needle body is made of 304 stainless steels.
A kind of production technology of Painless type drawing-in type medical needle, comprises the following steps:
(1)Needle tubing is first prepared, then in needle tubing side laser cutting needle outlet;
(2)Syringe needle and needle tubing will be subjected to TIG weld again, using the power supply of vertical external characteristics, protective gas is argon gas, pure
Spend for 99.99%, when welding current is 50-150A, argon flow amount is 8-10L/min, when electric current is 150-250A, argon flow amount
For 12-15L/min, the length that tungsten electrode is protruded from gas nozzle is 4-5mm, and nozzle to the distance worked is no more than 15mm, welding
Arc length is 1-3mm, and tungsten electrode center line keeps angle to be 80-85 ° with weld workpiece, filler wire and workpiece surface angle
For 10 °;
(3)After the completion of welding, then with hairbrush the syringe needle after the completion of welding is cleaned, using less than 400 °C hydraulic pressure and
Air pressure purging polishing, described hydraulic pressure and the buffer brake of air pressure are 0.4~0. 5MPa, until syringe needle and needle tubing junction table
Face Glabrous thorn;
(4)Alkaline low-temperature oxidation processes formation graduation mark will be carried out on the needle body after the completion of purging again:It will first be beaten on needle body
Sandblasting is ground, then is removed cured 10 minutes at 80-95 DEG C, then by needle body oil removing 5-10 minutes, is then first washed, then uses acid solution soak at room temperature
Pickling in 3-5 minutes, described acid solution is 50% analysis pure hydrochloric acid, then washes and wash away acid solution, then with sodium hydroxide 15%, phosphoric acid
Sodium 3%, natrium nitrosum 2%, lead peroxide 2%, iron hydroxide 0.1%, surplus are handled for the solution oxide of water, and treatment temperature is 120-
128 DEG C, continue 2-5 minutes, thoroughly wash 10-15 minutes again, wash away the solution of remained on surface, then dry, place to be oxidized
The needle body surface of reason is formed after oxide-film closed protective, is dried again;
(5)The needle body that oxidation processes are finished is purged using less than 400 °C hydraulic pressure and air pressure again, and described hydraulic pressure is gentle
The buffer brake of pressure is 0.4~0. 5MPa and then dehydrated, and produces described Painless type drawing-in type medical needle.
The beneficial effects of the invention are as follows:The invention provides a kind of Painless type drawing-in type medical needle and its production technology,
The front end of drawing-in type medical needle is welded with to the syringe needle of smooth circular arc by welding procedure, syringe needle is not stabbed in vivo
Patient, causes inevitable secondary injury, and the syringe needle of smooth circular arc can also substantially reduce the pain of patient in vivo,
Syringe needle is mellow and full, safer compared to Tip-headed needle, lateral opening, and evenly, injection effect more preferably, and is set injectable media on needle body
Put graduation mark, for indicating that needle body inserts human depth, more it is accurate precisely, and using TIG weld coordinate follow-up hydraulic pressure with
Air pressure purging polishing, makes the syringe needle being welded on tiny needle tubing firmly smooth, and the present invention melts workpiece by TIG weld technique
Change, form specific molten bath, tiny syringe needle pin needle tubing is combined together well, be not readily separated and come off, and welded
Needle tubing will not be caused to damage in journey and deformed, and the black film of the graduation mark of chemical attack generation is solid, and due to treatment temperature
It is low, surface attractive in appearance can be kept.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is enlarged drawing at A of the present invention.
1- needle bodies in figure, 2- pin holes, 3- syringe needles, 4- graduation marks.
Embodiment
The present invention is further described in conjunction with Fig. 1, Fig. 2, a kind of Painless type drawing-in type medical needle, including needle body
1, described needle body 1 is made of 304 stainless steels.Described needle body 1 is hollow cylinder, and the described side of needle body 1 is provided with pin
Hole 2, described pin hole 2 is formed using laser cutting.The described top of needle body 1 is provided with the syringe needle 3 with human contact, described pin
First 3 be smooth curved surface, and described syringe needle 3 is with needle body 1 by being welded to connect.If being also uniformly provided with described needle body 1
Do for indicating that needle body 1 inserts the graduation mark 4 of human depth.Described graduation mark 4 is etched in the table of needle body 1 by chemical attack
Face.The front end of drawing-in type medical needle is welded with the syringe needle 3 of smooth circular arc by welding procedure by the present invention, syringe needle 3 is existed
Patient will not be stabbed in vivo, cause inevitable secondary injury, and the syringe needle 3 of smooth circular arc be able to can also be substantially reduced in vivo
The pain of patient, syringe needle 3 is mellow and full, safer compared to Tip-headed needle, lateral opening, and evenly, injection effect is more preferable for injectable media,
And graduation mark is set on needle body, it is more accurate accurate for indicating that needle body inserts human depth.
A kind of production technology of Painless type drawing-in type medical needle, comprises the following steps:
(1)Needle tubing is first prepared, then in the needle tubing side laser cutting needle outlet of preparation;
(2)Syringe needle and needle tubing will be subjected to TIG weld again, using the power supply of vertical external characteristics, positive polarity is used during direct current
(Welding wire connects negative pole), protective gas is argon gas, and purity is 99.99%, when welding current be 50 ~ 150A when, argon flow amount be 8 ~
10L/min, when electric current is 150 ~ 250A, argon flow amount is 12 ~ 15L/min.The length that tungsten electrode is protruded from gas nozzle, with 4 ~
5mm is preferred, and is 2 ~ 3mm in the place of the shieldings such as fillet welding difference, is 5 ~ 6mm, nozzle to the distance worked in the deep place of fluting
15mm is usually no more than, to prevent the appearance of weld blowhole, welding position must be cleaned out if any iron rust, greasy dirt etc..Welding
Arc length, during welding ordinary steel, is preferred with 2 ~ 4mm, and during soldering stainless steel, is preferred with 1 ~ 3mm, and long then protecting effect is not
Good, during docking bottoming, to prevent the back side of bottom welding bead to be oxidized, the back side is also required to implement gas shield, to make argon gas fine
Welding pool is protected on ground, and is easy to welding to operate, and tungsten electrode center line should typically keep 80 ~ 85 ° of angles, filling weldering with weld workpiece
Silk should be small as much as possible with workpiece surface angle, generally 10 ° or so, windproof with taking a breath.There is the place of wind, business please take backstop
Measure, and should then take appropriate ventilation measure indoors;
(3)After the completion of welding, then with hairbrush the syringe needle after the completion of welding is cleaned, using less than 400 °C hydraulic pressure and
Air pressure purging polishing, described hydraulic pressure and the buffer brake of air pressure are 0.4~0. 5MPa, until syringe needle and needle tubing junction table
Face Glabrous thorn;
(4)Alkaline low-temperature oxidation processes formation graduation mark will be carried out on the needle body after the completion of purging again:It is first that needle body is enterprising
Row polishing sandblasting, then removed cured 10 minutes under the conditions of 80-95 DEG C, then by stainless steel needle body oil removing 5-10 minutes, then first wash,
Use the pickling in 3-5 minute of acid solution soak at room temperature again, described acid solution is 50% analysis pure hydrochloric acid, then washes and washes away acid solution, Ran Houyong
Sodium hydroxide 15%, sodium phosphate 3%, natrium nitrosum 2%, lead peroxide 2%, iron hydroxide 0.1%, surplus are at the solution oxide of water
Reason, treatment temperature is 120-128 DEG C, continues 2-5 minutes, thoroughly washes 10-15 minutes again, washes away the solution of remained on surface,
Then dry, the needle body surface of processing to be oxidized is formed after oxide-film closed protective, is dried again, the black film of this method generation
It is solid, because treatment temperature is low, it can keep attractive in appearance.
(5)The needle body that oxidation processes are finished is purged using less than 400 °C hydraulic pressure and air pressure again, and described hydraulic pressure is gentle
The buffer brake of pressure is 0.4~0. 5MPa and then dehydrated, and produces described Painless type drawing-in type medical needle.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.