CN106512141A - Inner-wound-free slight soreness medical needle and machining method thereof - Google Patents
Inner-wound-free slight soreness medical needle and machining method thereof Download PDFInfo
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- CN106512141A CN106512141A CN201611027258.6A CN201611027258A CN106512141A CN 106512141 A CN106512141 A CN 106512141A CN 201611027258 A CN201611027258 A CN 201611027258A CN 106512141 A CN106512141 A CN 106512141A
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- plane
- needle
- line style
- cutting edge
- sandblasting
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3286—Needle tip design, e.g. for improved penetration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/16—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding sharp-pointed workpieces, e.g. needles, pens, fish hooks, tweezers or record player styli
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2207/00—Methods of manufacture, assembly or production
Abstract
The invention discloses an inner-wound-free slight soreness medical needle. The end, close to a needle point, of a puncture inner cutting edge is a sharp cutting edge segment. The end, close to a radial cutting edge, of the puncture inner cutting edge is an arc pressing segment. The cross section of a vertical section of an inner-wound arc cutting edge is in an arc shape. The arc radius of the arc top end of the inner-wound arc cutting edge is larger than the arc radii of the two sides. The radial cutting edge is in arc transition connection with a first oblique face and a left second oblique face or a right second oblique face. Meanwhile, a method for carrying out linear sand blasting air knife grinding on the needle part at the front end of a needle tubing through a linear sand blasting nozzle is introduced, and specific process requirements for sand blasting air knife grinding machining and a structure of the linear sand blasting nozzle are put forward. According to the inner-wound-free slight soreness medical needle, structural improvement on three aspects is carried out on the need point part of an existing medical needle, an unpredictable technical effect is achieved, the soreness generated at the beginning of punching of the needle is relieved, and the soreness caused by secondary scratching during deep insertion and pulling out of the needle is eliminated.
Description
Technical field:
The present invention relates to a kind of medical needle, more particularly to one kind during injection inserting needle will not be won tissue and make
Into the medical needle and its processing method of interior wound, belong to medical instruments field.
Background technology：
Medical needle is a kind of people's medical apparatus and instruments the most well known, it is sick after to have an injection, transfuse blood and infuse be most conventional
Treatment meanss, existing medical needle are carried on the back in 200610112919.5 Chinese patent description as Kunming applicant Yang Changyan
Described in scape technology segment, " existing medical needle structure is typically processed with rustless steel tubule, in rustless steel
One end of pipe forms the first inclined-plane with first time cutting, then oblique first by second cutting on the basis of the first inclined-plane
About 30%～40% position of the front end in face forms the second cambered surface, as stainless steel tube has certain thickness, is gone out by secondary needle point
The inwall of liquid mouth rustless steel tubule can form cutting edge of a knife or a sword mouth in pin, then form needle point external-open cutting edge of a knife or a sword mouth in the outer wall of tubule.This structure
When syringe needle is used to have an injection, infuse, transfuse blood, successively with the second cambered surface of needle point, the first inclined-plane, puncture tissue, by needle point
Outer cutting edge of a knife or a sword mouth breaks tissue, it is ensured that during medicinal liquid flows into blood vessel or human body meat tissue from rustless steel thin tube inner wall, grasp in inserting needle
In work, the second cambered surface and is staggered to form splitter to human body without interior wound between the interior cutting edge of a knife or a sword mouth on the first inclined-plane and external-open cutting edge of a knife or a sword mouth, in inserting needle
During can extract the tissue for touching, formed in wound surface." this is that people when puncturing such as why have an injection, infuse can feel
To the main cause of very pain, while this kind of syringe needle issuable master in use is also described in the patent documentation
Species to be endangered.
Above-mentioned patent documentation is directed to existing medical needle point existing defects, there is provided a kind of non-inner-wound medical needle, and introduces
A kind of processing method.
The non-inner-wound medical needle, including a syringe needle tubule, syringe needle tubule front end have the pin that an inclined cross section is formed
Point, section have interior cutting edge of a knife or a sword mouth and external-open cutting edge of a knife or a sword mouth, and the interior cutting edge of a knife or a sword mouth in 60～70% region of inclined cross section rear end is fillet.And refer to
The fillet for going out interior cutting edge of a knife or a sword mouth adopts grinding method come real.
This scheme is only a kind of imagination of a primary person of good sense, due to the diameter very little of needle point fine steel tube, with method for grinding without
The fillet of cutting edge of a knife or a sword mouth in method processing, therefore, the program cannot be implemented.
On this basis, Yang Chang swallows in Kunming are improved to it again, in Chinese patent 200810222767.3 in detail
A kind of structure of safe medical needle head is described, it includes a syringe needle tubule, syringe needle tubule front end is provided with the second inclined-plane and
One inclined-plane, the axial length L 1 on the first inclined-plane are less than the second inclined-plane axial length L 2；It is preferred that the second chamfer length L2 accounts for two inclined-planes
The 65～75% of total length L, and pin cutting edge of a knife or a sword sets the little concave arc for extending back near camber line apical position in the first inclined-plane.The invention
In the structure of original syringe needle, the second inclined-plane L2 is made to extend to the first inclined-plane, and by works such as fine grinding, sandblasting or LASER HEAT TREATMENTs
Skill forms one section of little concave arc on interior pin cutting edge of a knife or a sword camber line top, in the patent documentation, applies for person, and this structure can reduce original pin
Head inserting needle resistance, and ensure that its will not connection tissue and reach and be perfectly safe, cause inserting needle more smooth, amount of bleeding reduce
Mitigate with the sense of patient's pain, the medical needle that alternative existing various occasions are used.
This medical needle structure is current state-of-the-art design syringe needle, but by acupuncture course analysis it is recognized that while the
The interior cutting edge of a knife or a sword mouth of the needle point formed by one inclined-plane will not scratch when being pierced into tissue produce in create, but the first inclined-plane when extracted is interior
Cutting edge of a knife or a sword mouth can cause secondary scratching to tissue.Therefore, this syringe needle puncturing, inserting needle and can produce during going out pin three times it is more strong
Sharp pain.On the other hand, up to the present this syringe needle cannot also be processed into product, although propose in the patent documentation
Sandblasting or LASER HEAT TREATMENT processing technique, but it is a kind of scenario, cannot also be oblique to first by current manufacturing process
In face, pin cutting edge of a knife or a sword sets the little concave arc for extending back and is processed near camber line apical position.According to GB GB15811-2001 (once
Property use aseptic injection pin) and GB18671-2009 (single use venoclysis needle) regulation, medical needle it is a diameter of
0.30～1.2 millimeter, the aperture of needle tubing is 0.11～0.83 millimeter, will be processed on so little inner hole wall and in specified location
It is impossible to go out specific little concave arc.Therefore, design requirement cannot be met according to existing sandblasting processing method.
In existing medical needle processing technique, although the tip portion of syringe needle is sprayed using blasting method
Sand is processed, but be its objective is for removing needle point and the grinding burr on each cutting edge, and existing blast nozzle is overall structure,
Sandblasting hole is arranged on the center of sandblasting body, and sandblasting hole is cylindrical hole, sandblasting hole with diameter greater than waiting 0.9 millimeter,
In sandblasting procedures, often there is choking phenomenon in Jing, and blasting pressure have to be larger than 1.0MPa, and the effect of otherwise deburring is not just reached
Standard.
The content of the invention：
In order to overcome the shortcomings of that 200810222767.3 patent formulas are present, it is an object of the invention to provide one kind is without interior wound
Hypodynia sense medical needle and its processing method.
Organization plan without interior wound hypodynia sense medical needle of the present invention is as follows：
It is a kind of to create hypodynia sense medical needle, including syringe needle tubule without interior, it is characterized in that：A left side is provided with the front end of syringe needle tubule
Second inclined-plane, right second inclined-plane and the first inclined-plane, left second inclined-plane, right second inclined-plane and syringe needle tubule three are on the front top of syringe needle
Needle point is formed, cylindrical formation between left second inclined-plane or right second inclined-plane of syringe needle tubule punctures outer cutting edge, syringe needle tubule
Formed between endoporus and left second inclined-plane or right second inclined-plane and puncture inner cutter hole, shape between the endoporus of syringe needle tubule and the first inclined-plane
Cutting edge of a knife or a sword mouth is cut into interior wound circular arc, a radial direction cutting edge is respectively formed between left second inclined-plane, right second inclined-plane and the first inclined-plane, is punctured
Inner cutter hole is sharp keen cutting edge section near needle tip, and it is that circular arc oppresses section, the interior wound to puncture inner cutter hole near radial direction cutting edge one end
It is circular arc that circular arc cuts the cross sectional shape of cutting edge of a knife or a sword mouth vertical section, and the interior arc radius for creating the circular arc top that circular arc cuts cutting edge of a knife or a sword mouth are more than
Connect for arc transition between the arc radius of both sides, radial direction cutting edge and the first inclined-plane and left second inclined-plane or right second inclined-plane.
Further, the length of sharp keen cutting edge section is puncture inner cutter hole total length 15%～50%.
Further, the length of sharp keen cutting edge section is puncture inner cutter hole total length 30%.
The above-mentioned processing method without interior wound hypodynia sense medical needle is as follows：
The first step：Needle tubing blank arrangement group is vertically clamped in double-plate fixture, the front end of needle tubing is carried out with grinding machine
Grinding, forms the first inclined-plane, forms interior wound circular arc and cut cutting edge of a knife or a sword mouth between the endoporus of syringe needle tubule and the first inclined-plane；
Second step：Needle tubing blank arrangement group is made to the predetermined angular that moves in the direction of the clock by rubbing double-plate fixture,
The front end of needle tubing is ground with grinding machine, forms left second inclined-plane, the cylindrical of syringe needle tubule is formed between left second inclined-plane
Outer cutting edge is punctured, is formed between the endoporus of syringe needle tubule and left second inclined-plane and is punctured inner cutter hole, it is oblique with first on left second inclined-plane
Radial direction cutting edge is formed between face；
3rd step, makes needle tubing blank arrangement group to rotating predetermined angular counterclockwise by rubbing double-plate fixture,
The front end of needle tubing is ground with grinding machine, forms right second inclined-plane, the cylindrical of syringe needle tubule is formed between right second inclined-plane
Outer cutting edge is punctured, is formed between the endoporus of syringe needle tubule and right second inclined-plane and is punctured inner cutter hole, it is oblique with first on right second inclined-plane
Radial direction cutting edge is formed between face；
4th step, the sandblasting air knife formed with line style blast nozzle carry out grinding
The needle tubing blank arrangement group with needle point that 3rd step is obtained is sent into into sandblasting grinding station, with line style blast nozzle pair
The needle portion of needle tubing front end carries out the grinding of line style sandblasting air knife, and the concrete technology of the sandblasting air knife grinding is required such as
Under：
1. by line style blast nozzle along needle axis directional spreding, the end face of line style blast nozzle and the first inclined-plane of syringe needle or pin
The diameter parallel of head tube, between first inclined-plane or needle body outer wall of the end face and syringe needle of line style blast nozzle, distance is 2～50
Millimeter, line style blast nozzle alignment syringe needle carry out the reciprocating grinding of sandblasting back and forth；
2. line style sand jet outlet is provided with the end face of line style blast nozzle, the width of line style sand jet outlet is 0.1～0.50 millimeter,
The length of line style sand jet outlet is 0.70～2.50 millimeter；
3. Particle size requirements of sandblasting：The dry sand of 280 mesh～320 mesh；
4. blasting pressure：0.8～1.0MPa；
It is a kind of to create hypodynia sense medical needle special line-type blast nozzle, including sandblasting body without interior, it is characterized in that：In sandblasting sheet
Along sandblasting axially at least provided with a line style sandblasting hole on body, the sand export width of line style sandblasting hole is 0.10～0.50 millimeter,
The length of the sand export of line style sandblasting hole is 0.70～2.50 millimeter.
Further, including more than two line style sandblasting holes, and the distance between adjacent two lines type sandblasting hole is 2～20 millis
Rice.
Further, line style sandblasting hole is bellmouth, and the size of sand inlet is more than the size of sand export.
Further, the sand inlet size of line style sandblasting hole and the ratio of the size of sand export are 5～1.5：1.
Further, the sandblasting body is Split assembled structure, and die joint is by line style sandblasting hole.
Further, the sandblasting body is combined by upper die body and lower mold body.
The present invention has carried out the structure of three aspects and has improved to the tip portion of existing medical needle, and achieve be difficult to it is pre-
The technique effect of material：
First, the puncture inner cutter hole formed between the endoporus of syringe needle tubule and left second inclined-plane or right second inclined-plane is divided into
Two-stage nitration, is sharp keen cutting edge section near needle tip, is that circular arc oppresses section near radial direction cutting edge one end, and circular arc oppresses the axial cross section of section
Shape is changed to arc surface, makes circular arc compressing section lose the effect of interior cutting edge of a knife or a sword mouth, during inserting needle, by needle point, two sharp keen cutting edge sections, by syringe needle
Cylindrical two formed between left second inclined-plane, right second inclined-plane of tubule are punctured outer cutting edge and complete jointly to puncture cut, so
Outer cutting edge is punctured by two afterwards and continues expansion breaking cellular wall, completed to acupuncture skin histology jointly by circular arc compressing section and needle tubing outer wall or
The hemostasis by compression pain relieving of blood vessel, realizes needle point after puncturing without pain；If by circular arc oppress section section arc radius be designed to by
Gradual change is big, and effect is more preferable.
Second, the interior wound circular arc formed between the endoporus of syringe needle tubule and the first inclined-plane is cut cutting edge of a knife or a sword mouth carries out radiused setting
Meter, makes it both will not produce secondary shearing to subcutis or blood vessel, forms secondary shearing pain, and same to shape
Into wound surface realize hemostasis by compression and pain relieving.
3rd, the radial direction cutting edge formed between left second inclined-plane, right second inclined-plane and the first inclined-plane is carried out into smooth circular arc
Design, connects for arc transition between radial direction cutting edge and the first inclined-plane and left second inclined-plane or right second inclined-plane.So, go out pin
When, radial direction cutting edge wound face will not be carried out three times draw thorn, eliminate the third time during having an injection puncture generation pain and
Bleeding.
The needle point sandblasting method for grinding that the present invention is provided is provided for the commercial production without interior wound hypodynia sense medical needle can
The processing support for leaning on, it is wherein that the line style nozzle of Split assembled structure forms the controllable wind sand blade of thickness and blasting craft requirement
Most important core technology, line style sand jet outlet reduced width to the diameter of bore less than syringe needle, the dry sand of 280 mesh～320 mesh exist
Under 0.8～1.0MPa kilogram of blasting pressure effect, sprayed into from sand inlet at a high speed, the thickness of the high speed winds sand knife sprayed from sand export
Diameter of bore of the degree less than syringe needle, the interior wound circular arc for thus being formed between the endoporus to syringe needle tubule and the first inclined-plane cut cutting edge of a knife or a sword mouth
Radiused sandblasting grinding is carried out, as the syringe needle that sand milling to be painted is cut is to be vertically arranged, by the line style sandblasting of line style blast nozzle
The end face in hole is be arranged in parallel with the first inclined-plane, and the distance between end face and the first inclined-plane of shaking out of line style sandblasting hole be set as 3～
15 millimeters, prevent the high pressure sand flow for spraying from forming the diffusion of sandblasting air knife screen, so as to reduce ground effect, sandblasting hole is designed to into cone
Pore structure, not only improves the blasting pressure for improving sand export, is also beneficial to improve out the density containing sand of sandblasting stream, improves sandblasting wind
Sandblasting hole is designed to linear structure by the smoothness of the grinding efficiency and grinding skin of sand knife, and this is the core technology of the present invention,
It is the precondition for realizing being ground needle tubing endoporus, because the width of line style spout can be with sufficiently fine, as long as being more than sand
Grain diameter, what the high-pressure blast sand flow sprayed from line style spout was formed are substantially the controllable grinding wheel of a piece of thickness, can be real
The now grinding to needle tubing endoporus and needle tubing wall body, realizes the brand-new technological equipment to the accurate processing of needle tubing.Sandblasting hole is set
The ejection both beneficial to sand flow of meter strip taper hole structure, prevents the obstruction of sand grains, and beneficial to the blasting pressure and spray for improving sand export
Sand density, under conditions of the pressure that ensures to shake out is constant, can reduce into sand pressure, reducing energy consumption, sandblasting hole is designed at interval
The a plurality of structure of distribution can significantly improve sandblasting grinding efficiency, it is ensured that blast nozzle is required relative to the installation site of syringe needle, is energy
The requirement of needle point grinding everywhere is realized enough.
Description of the drawings：
Fig. 1 is the structural representation without interior wound hypodynia sense medical needle；
Top views of the Fig. 2 for Fig. 1；
Fig. 3 is Fig. 1 axonometric charts, i.e. pin with the postrotational structural representation in angle；
Fig. 4 is A-A sectional views in Fig. 2；
Fig. 5 is B-B sectional views in Fig. 2；
Fig. 6 is the sectional view of C-C positions in Fig. 2；
Fig. 7 is the sectional view of D-D positions in Fig. 2；
Processing process figures of the Fig. 8 for syringe needle；
A kind of structural representations of the Fig. 9 for line style blast nozzle；
E-E sectional views of the Figure 10 for Fig. 9；
Figure 11 is a kind of combining structure schematic diagram assembled by upper die body and lower mold body；
Figure 12 is the schematic diagram to syringe needle sandblasting grinding, and the sandblasting end face of line style blast nozzle is parallel with the first inclined-plane；
Figure 13 is another kind of schematic diagram to syringe needle sandblasting grinding, the sandblasting end face of line style blast nozzle and syringe needle needle tubing axis
It is parallel；
In figure：1- syringe needle tubules；The second inclined-plane of 2- left sides；The second inclined-plane of the 3- right sides；The first inclined-planes of 4-；5- needle points；6- punctures outer
Cutting edge；7- punctures inner cutter hole；In 8-, wound circular arc cuts cutting edge of a knife or a sword mouth；9- radial direction cutting edges；11- sandblasting bodies；12- line style sandblasting holes；13- enters
Sand mouth；14- sand exports；15- die joints；16- upper die bodies；17- lower mold bodies；The sharp keen cutting edge sections of 71-；72- circular arcs oppress section.
Specific embodiment
The specific embodiment of the present invention is exemplified below：
A kind of to create hypodynia sense medical needle without interior, as shown in Fig. 1～Fig. 7, it includes syringe needle tubule 1, in syringe needle tubule 1
Front end be provided with left second inclined-plane 2, right second inclined-plane 3 and the first inclined-plane 4, left second inclined-plane 2, right second inclined-plane 3 and syringe needle are thin
1 three of pipe forms needle point 5 on the front top of syringe needle, syringe needle tubule 1 it is cylindrical respectively with left second inclined-plane 2 and right second inclined-plane 3 it
Between it is each form one and puncture outer cutting edge 6, the endoporus of syringe needle tubule 1 respectively with left second inclined-plane 2 and right second inclined-plane 3 formation one
Puncture inner cutter hole 7, between the endoporus of syringe needle tubule 1 and the first inclined-plane 4 formed in wound circular arc cut cutting edge of a knife or a sword mouth 8, left second inclined-plane 2,
A radial direction cutting edge 9 is respectively formed between right second inclined-plane 3 and the first inclined-plane 4, is sharp keen sword inner cutter hole 7 being punctured near needle tip
Mouth section 71, is that circular arc oppresses section 72 inner cutter hole 7 is punctured near 9 one end of radial direction cutting edge, and the interior wound circular arc cuts cutting edge of a knife or a sword mouth 8 along needle tubing
The axis direction and section cross sectional shape perpendicular to the first inclined-plane 4 is arc surface, and the whole circular arc of cutting edge of a knife or a sword mouth 8 is cut in interior wound circular arc
Duan Shang, the arc radius R1 positioned at circular arc top are more than the arc radius R2 of both sides, radial direction cutting edge 9 and the first inclined-plane 4, a left side second
Arc transition connection is between inclined-plane 2 and right second inclined-plane 3, the length of sharp keen cutting edge section 71 is puncture 7 total length of inner cutter hole
15%～50%, be 30% in this example.
The above-mentioned processing method without interior wound hypodynia sense medical needle is as shown in figure 8, comprise the steps：
Step one：Needle tubing blank arrangement group is vertically clamped in double-plate fixture, with cylindrical grinder to vertical fixation
Syringe needle tubule Xiang Duan carries out grinding and forms the first inclined-plane 4, and interior wound circular arc is formed between the endoporus of syringe needle tubule 1 and the first inclined-plane 4
Cut cutting edge of a knife or a sword mouth 8；
Step 2：Require to make needle tubing blank arrangement group to by right hour hands side by rubbing double-plate fixture according to needle design
To predetermined angular is rotated, second grinding is carried out with cylindrical grinder to the front end of needle tubing, form left second inclined-plane 2, thus exist
Cylindrical formation between left second inclined-plane 2 of syringe needle tubule 1 punctures outer cutting edge 6, on endoporus and left second inclined-plane of syringe needle tubule 1
Puncture inner cutter hole 7 is defined between 2, radial direction cutting edge 9 is formed between left second inclined-plane 2 and the first inclined-plane 4；
Step 3, makes needle tubing blank arrangement group rotate predetermined angular to by left clockwise by rubbing double-plate fixture,
Carry out third time grinding with cylindrical grinder to the front end of needle tubing, form right second inclined-plane 3, so the cylindrical of syringe needle tubule 1 with
Formed between right second inclined-plane 3 and puncture outer cutting edge 6, formed between the endoporus and right second inclined-plane 3 of syringe needle tubule 1 and puncture inner edge
Mouth 7, forms radial direction cutting edge 9 between right second inclined-plane 3 and the first inclined-plane 4；
4th step, line style sandblasting air knife grinding
The needle tubing blank arrangement group with needle point that step 3 is obtained is sent into into line style sandblasting air knife grinding station, line style is used
Blast nozzle carries out the grinding of line style sandblasting air knife, the concrete technology of the sandblasting air knife grinding to the needle portion of needle tubing front end
Require as follows：
First, the design requirement of line style blast nozzle used by the grinding of line style sandblasting air knife, as described and depicted in figs. 9-13, including sandblasting sheet
Body 11, along sandblasting axially at least provided with a line style sandblasting hole 12, the sand export width of line style sandblasting hole 12 on sandblasting body 11
Spend for 0.10～0.50 millimeter, the selected value of the size should be less than the needle tubing internal diameter of syringe needle to be processed, line style sandblasting hole 12 goes out
The length of sand mouth is 0.70～2.50 millimeter, and the selected value of the size should be corresponding with the specification of syringe needle to be processed；
If taking more than two line style sandblasting holes 12, the distance between adjacent two lines type sandblasting hole 12 is designed as 2～
20 millimeters.
In order to further improve the efficiency and ground effect of the grinding of sandblasting air knife, line style sandblasting hole 12 should be designed tapered
Hole, the size of sand inlet 13 should be greater than the size of sand export 14, and the ratio of 13 size of sand inlet and the size of sand export 14 is 5～
1.5：1.
In order to be able to the taper sandblasting hole of outgoing-line type is processed with conventional machining process, applicant has created Split assembled
The sandblasting body 11 of structure is designed, and by die joint 15 by, on 12 present position of line style sandblasting hole, sandblasting body 11 preferentially sets
The combinative structure being made up of upper die body 16 and lower mold body 17 is counted into, die joint 15 is arranged on the centre bit of 12 length of line style sandblasting hole
Put, such upper die body 16 and lower mold body 17 are symmetrical structure.
Second, the installation site of sandblasting air knife grinding special line-type blast nozzle is required：
Scheme 1：The end face of line style blast nozzle is parallel with the first inclined-plane of syringe needle, the end face of line style wind sand knife blast nozzle with
Between first inclined-plane of syringe needle, distance is 2～15 millimeters, makes line style blast nozzle alignment syringe needle carry out reciprocating sandblasting air knife back and forth
Grinding；
Scheme 2：By line style wind sand knife blast nozzle along needle axis directional spreding, the end face of line style blast nozzle and the pin of syringe needle
Pipe diameter parallel, between the end face and needle body of line style blast nozzle are cylindrical, distance is 2～15 millimeters, line style blast nozzle alignment pins
Pipe carries out the reciprocating air knife of sandblasting back and forth grinding；
3rd, the chiltern of sandblasting is required：280 mesh～320 mesh of particle diameter of sand, dry sand of the moisture content less than 3%；
4th, blasting pressure is required, the pressure that shakes out is 0.8～1.0MPa.
Claims (10)
1. one kind creates hypodynia sense medical needle, including syringe needle tubule (1) without interior, it is characterized in that：Set in the front end of syringe needle tubule (1)
There are left second inclined-plane (2), right second inclined-plane (3) and the first inclined-plane (4), left second inclined-plane (2), right second inclined-plane (3) and syringe needle
Tubule (1) three forms needle point (5) on the front top of syringe needle, and cylindrical and left second inclined-plane (2) of syringe needle tubule (1) or the right side second are oblique
Formed between face (3) and puncture outer cutting edge (6), the endoporus of syringe needle tubule (1) and left second inclined-plane (2) or right second inclined-plane (3) it
Between formed puncture inner cutter hole (7), between the endoporus of syringe needle tubule (1) and the first inclined-plane (4) formed in create circular arc cut cutting edge of a knife or a sword mouth (8),
A radial direction cutting edge (9) is respectively formed in left second inclined-plane (2), between right second inclined-plane (3) and the first inclined-plane (4), inner edge is punctured
Mouth (7) is sharp keen cutting edge section (71) near needle tip, punctures inner cutter hole (7) and oppresses section for circular arc near radial direction cutting edge (9) one end
(72) cross sectional shape that, the interior wound circular arc cuts cutting edge of a knife or a sword mouth (8) vertical section is circular arc, and interior wound circular arc cuts the circle of cutting edge of a knife or a sword mouth (8)
Arc radius of the arc radius of arc top more than both sides, radial direction cutting edge (9) and the first inclined-plane (4) and left second inclined-plane (2) or
Connect for arc transition between right second inclined-plane (3).
2. it is characterized in that without interior wound hypodynia sense medical needle according to claim 1：The length of sharp keen cutting edge section (71) is to wear
The 15%～50% of thorn inner cutter hole (7) total length.
3. it is characterized in that without interior wound hypodynia sense medical needle according to claim 2：The length of sharp keen cutting edge section (71) is to wear
The 30% of thorn inner cutter hole (7) total length.
4. the processing method without interior wound hypodynia sense medical needle described in claim 1, comprises the steps：
Step one：Needle tubing blank arrangement group is vertically clamped in double-plate fixture, the front end of needle tubing is ground with grinding machine,
The first inclined-plane (4) is formed, interior wound circular arc is formed between the endoporus of syringe needle tubule (1) and the first inclined-plane (4) and is cut cutting edge of a knife or a sword mouth (8)；
Step 2：Needle tubing blank arrangement group is made to the predetermined angular that moves in the direction of the clock by rubbing double-plate fixture, with mill
Bed is ground to the front end of needle tubing, forms left second inclined-plane (2), syringe needle tubule (1) it is cylindrical between left second inclined-plane (2)
Formed and puncture outer cutting edge (6), formed between the endoporus of syringe needle tubule (1) and left second inclined-plane (2) and puncture inner cutter hole (7), on a left side
Radial direction cutting edge (9) is formed between second inclined-plane (2) and the first inclined-plane (4)；
Step 3：Needle tubing blank arrangement group is made to predetermined angular is rotated counterclockwise by rubbing double-plate fixture, with mill
Bed is ground to the front end of needle tubing, forms right second inclined-plane (3), syringe needle tubule (1) it is cylindrical between right second inclined-plane (3)
Formed and puncture outer cutting edge (6), formed between the endoporus of syringe needle tubule (1) and right second inclined-plane (3) and puncture inner cutter hole (7), on the right side
Radial direction cutting edge (9) is formed between second inclined-plane (3) and the first inclined-plane (4)；
Step 4：Line style sandblasting air knife grinding is carried out with line style blast nozzle to needle point
The needle tubing blank arrangement group with needle point that step 3 is obtained is sent into into line style sandblasting grinding station, with line style blast nozzle pair
The needle portion of needle tubing front end carries out the grinding of line style sandblasting air knife, and the concrete technology of the line style sandblasting air knife grinding is required
It is as follows：
1. by first inclined-plane or the diameter parallel of syringe needle tube of the end face of line style blast nozzle and syringe needle, the end face of line style blast nozzle with
Between first inclined-plane or needle body outer wall of syringe needle, distance is 2～15 millimeters, and line style blast nozzle alignment syringe needle carries out reciprocating
Line style sandblasting air knife grinding back and forth；
2. line style sand jet outlet is provided with the end face of line style blast nozzle, the width of line style sand jet outlet is 0.1～0.50 millimeter, line style
The length of sand jet outlet is 0.70～2.50 millimeter；
3. Particle size requirements of sandblasting：The dry sand of 280 mesh～320 mesh；
4. blasting pressure：0.8～1.0Mpa.
5. in the processing method without interior wound hypodynia sense medical needle described in claim 4, line style blast nozzle used, its feature
It is：Including sandblasting body (11), it is characterized in that：Along sandblasting axially at least provided with a line style sandblasting hole on sandblasting body (11)
(12), the sand export width of line style sandblasting hole (12) is 0.10～0.50 millimeter, the length of the sand export of line style sandblasting hole (12)
For 0.70～2.50 millimeter.
6. line style blast nozzle according to claim 5, is characterized in that：It is including more than two line style sandblasting holes (12) and adjacent
The distance between two lines type sandblasting hole (12) are 2～20 millimeters.
7. line style blast nozzle according to claim 5, is characterized in that：Line style sandblasting hole (12) is bellmouth, and sand inlet
(13) size of the size more than sand export (14).
8. line style blast nozzle according to claim 7, is characterized in that：Sand inlet (13) size of line style sandblasting hole (12) with go out
The ratio of the size of sand mouth (14) is 5～1.5：1.
9. line style blast nozzle according to claim 5, is characterized in that：The sandblasting body (11) is Split assembled structure, point
Type face (15) is by line style sandblasting hole (12).
10. line style blast nozzle according to claim 5, is characterized in that：The sandblasting body (11) by upper die body (16) and under
Die body (17) is combined.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611027258.6A CN106512141B (en) | 2016-11-21 | 2016-11-21 | Medical needle without internal injury and slight pain and processing method thereof |
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| CN201611027258.6A CN106512141B (en) | 2016-11-21 | 2016-11-21 | Medical needle without internal injury and slight pain and processing method thereof |
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| CN106512141B CN106512141B (en) | 2021-09-10 |
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| CN106914827A (en) * | 2017-03-29 | 2017-07-04 | 江苏康友医用器械有限公司 | It is a kind of to process the line style blast nozzle without interior wound hypodynia sense medical needle |
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| CN109806464A (en) * | 2019-03-03 | 2019-05-28 | 吉林大学 | A kind of injection needle needle point and its manufacturing method |
| CN111345917A (en) * | 2019-06-05 | 2020-06-30 | 天津市第三中心医院 | Myocardial injection molding method and device after myocardial infarction of mouse |
| CN116586924A (en) * | 2023-07-17 | 2023-08-15 | 浙江一益医疗器械有限公司 | Stainless steel needle tube with needle tip five-inclined-plane structure and preparation process thereof |
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| CN116586924A (en) * | 2023-07-17 | 2023-08-15 | 浙江一益医疗器械有限公司 | Stainless steel needle tube with needle tip five-inclined-plane structure and preparation process thereof |
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