CN109820520A - A kind of manufacturing method of Dual-layer vacuum blood taking tube tube body - Google Patents
A kind of manufacturing method of Dual-layer vacuum blood taking tube tube body Download PDFInfo
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- CN109820520A CN109820520A CN201910113490.9A CN201910113490A CN109820520A CN 109820520 A CN109820520 A CN 109820520A CN 201910113490 A CN201910113490 A CN 201910113490A CN 109820520 A CN109820520 A CN 109820520A
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Abstract
The invention discloses a kind of manufacturing methods of Dual-layer vacuum blood taking tube tube body, comprising the following steps: S1 prepares the appurtenance for manufacturing Dual-layer vacuum blood taking tube tube body, which includes can airtight cavity, placement jig, Special punching die；S2 makes the PET outer tube of the Dual-layer vacuum blood taking tube tube body, and the PET outer tube wall is equipped with a limit interconnecting piece；S3 makes the PP inner tube of the Dual-layer vacuum blood taking tube tube body, and the PP outer wall of inner tube is equipped with the nip portion with the limit interconnecting piece interference fit；S4 it is described can be in airtight cavity, the PET outer tube for the composition interference fit connection made and PP inner tube are pressed using the placement jig and Special punching die, the Dual-layer vacuum blood taking tube tube body is made, and in the bonding processes by this can airtight cavity provide high vacuum vacuum environment.The advantages of present invention incorporates two kinds of materials is manufactured that the Dual-layer vacuum blood taking tube tube body haveing excellent performance.
Description
Technical field
The present invention relates to heparin tube manufacturing fields, specifically, being to be related to a kind of manufacture of Dual-layer vacuum blood taking tube tube body
Method.
Background technique
In plastic vacuum heparin tube series of products, there is a kind of anticoagulant blood-collecting pipe water-soluble by the sodium citrate that 1:9 is added
Liquid, for carrying out anticoagulation inspection.
PET(polyethylene terephthalate) resin has many good characteristics, oil resistant, resistance to rouge, it is acidproof, alkaline-resisting and
Resistance to most of solvents；Its gas and vapor permeability are low (OTR oxygen transmission rate 77cc/m2/day), existing excellent choke,
Water, oiliness energy；Transparency is high；Anti- gamma irradiation is had excellent performance；Glossiness is good nontoxic, tasteless, and wholesomeness is good, can directly use
In food packaging.It is currently the tube body material of the vacuum blood collection tube of global general-use, but due to containing parent in the macromolecular of PET material
Water hydroxyl, water imbibition is stronger, is easy the moisture content absorbed in sodium citrate aqueous solution and its concentration is caused constantly to rise, and then influences
The result of blood testing.The empirical data used according to product, single-layer PET test tube are used to do the sodium citrate aqueous solution of 1:9, water
Part completely lost the time within 8 months, and during which, the gradual change forfeiture of moisture content will exceed 10% permission model in 2 months
It encloses, leads to product failure.
PP(polypropylene) it is the highly crystalline polymer of nontoxic, odorless, tasteless milky, polyacrylic chemical stability is very
It is good, it is outer except that can be corroded by the concentrated sulfuric acid, concentrated nitric acid, it is good to all more stable chemical property of various other chemical reagent, and it is most absolutely
Number chemicals does not react；It is particularly stable to water, and water absorption rate in water is only 0.01%；PP(polypropylene) separately as true
Sky blood sampling tubular container is undesirable, has a disadvantage in that air-tightness (barrier properties for gases) is bad, OTR oxygen transmission rate 2300-
3100cc/m2/day, cannot achieve vacuum blood collection tube need to keep the performance of 10 months or more effective negative pressure；
The vacuum blood collection tube of finished product is using terminal gamma rays or electron beam sterilization；General PP(polypropylene) material one
As radiation resistance, irradiation can not interrupt PP(polypropylene) strand, cause product jaundice become fragile.The country there is no the spoke of resistance to gamma at present
According to PP(polypropylene) material batch production.
Dual-layer vacuum blood taking tube currently on the market, which has, is bonded two layers of tube body tube wall by optic-solidified adhesive to realize product knot
Structure；Have by with a kind of step stick harness rubber plug while clogging the nozzle of two layers of tube body and realize product structure；Have and passes through
Inner tube is blocked in outer tube wall plus back-off crest line to realize product structure；The structure of these product designs is asked there are following
Topic:
When assembling bimetallic tube, the air between crack that inside and outside tube wall is formed requires to eject this three kinds of methods, otherwise,
When the combination of progress Double-layer test tube, the air between the crack of inside and outside tube wall formation can generate pressure because of combination compression will be interior
It manages toward extrapolation, so, this three kinds of methods all devise air discharge duct.Two layers of tube body tube wall is wherein bonded by optic-solidified adhesive to realize
Product structure, although air discharge duct can be plugged, not can avoid its optic-solidified adhesive will not generate tiny wedge angle or micropore
Cause blood that blood coagulation occurs；Wherein the nozzle of two layers of tube body is clogged simultaneously with a kind of step stick harness rubber plug to realize product structure
, it will usually there is the risk being pulled out when extracting cap stopper together with inner tube；Wherein by outer tube wall plus back-off crest line
Inner tube is blocked to realize product structure, when blood in vitro carries out reverse mix with sodium citrate aqueous solution, often because
For the siphonage of air discharge duct, the mixed liquor of blood and medicament can be penetrated between the crack that inside and outside tube wall is formed, and influence blood
The result of inspection guarantees the clean and tidy of product, and equally has the risk being pulled out when extracting cap stopper together with inner tube；In the market
Double-layer plastic vacuum serum tube is difficult to meet the needs of Hospitals at Present.
Produce a kind of antiseep, anti-inner tube is detached from, vacuum is kept and water retention property is excellent, resistance to gamma or electron beam spoke
It is always blood according to sterilizing, material transparent and the hydrophobic anti-Hemostatic Oral Liquid wall built-up of inner surface of tube body Dual-layer vacuum blood taking tube tube body
The technical problem of inspection field urgent need to resolve.
Summary of the invention
The purpose of the present invention is to provide a kind of manufacturing methods of Dual-layer vacuum blood taking tube tube body, and PET is (poly- to benzene two
Formic acid second diester) material production outer tube with PP (polypropylene) material production inner tube reliable connection together with, realization has
Antiseep, anti-inner tube are detached from, vacuum is kept and water retention property is excellent, resistance to gamma or electron beam irradiation sterilization, material transparent
And the production of the Dual-layer vacuum blood taking tube tube body of the hydrophobic anti-Hemostatic Oral Liquid wall built-up of inner surface of tube body.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of manufacturing method of Dual-layer vacuum blood taking tube tube body, which comprises the following steps:
(S1) prepare the appurtenance for manufacturing Dual-layer vacuum blood taking tube tube body, which includes true enough for providing
Reciprocal of duty cycle environment can airtight cavity, for disposing the placement jig of the double-layer vacuum collection tube tube body double layer material, for pressing
Close the Special punching die for making the double-layer vacuum collection tube tube body；
(S2) the PET outer tube for making the Dual-layer vacuum blood taking tube tube body reaches the barrier properties for gases, resistance to for meeting requirement
Gamma irradiation, transparency and intensity, and the PET outer tube wall is equipped with a limit interconnecting piece；
(S3) the PP inner tube for making the Dual-layer vacuum blood taking tube tube body reaches the water preventing ability for meeting requirement, resistance to gamma
Irradiation, transparency and intensity, and the PP outer wall of inner tube is equipped with the nip portion with the limit interconnecting piece interference fit；
(S4) can be matched in airtight cavity using the composition interference that the placement jig and Special punching die will be made described
The PET outer tube and PP inner tube for closing connection are pressed, and the Dual-layer vacuum blood taking tube tube body are made, and in the bonding processes
In by this can airtight cavity provide high vacuum vacuum environment.
The step (S4) the following steps are included:
(S41) will place jig and Special punching die be correspondingly arranged at it is described can be in airtight cavity；
(S42) PET outer tube is placed in and is placed on jig, PP inner tube is placed in PET outer tube；
(S43) to can airtight cavity carry out being evacuated to -95Kpa；
(S44) Special punching die, which moves downward, presses PET outer tube and PP inner tube, and limit interconnecting piece and nip portion generate
Interference fit, completes the production of the Dual-layer vacuum blood taking tube tube body.
In the step (S2) limit interconnecting piece include the annular crest line near the PET outer tube wall nozzle with
And the inclined-plane on inner wall below the annular crest line.It is described annular crest line away from PET outer tube nozzle 4.2mm, be highly
0.1mm, width 0.05mm.
The nip portion is the step annulus on the outside of the PP inner tube nozzle, and the step annulus height is
2.5mm protrudes PP outer wall of inner tube 0.15mm, and step annulus bottom is equipped with step annulus chamfering, and the step annulus falls
Angular diameter is 0.15mm, and the step annulus outer wall inclined-plane is corresponding with PET outer tube wall inclined-plane, the step
The interference numerical value of annulus and PET outer tube wall is 0.12mm or so.
Further, PET outer tube wall nozzle is nearby equipped with annular crest line in the step S1, described when pressing is completed
The step annulus of PP inner tube is located at below the annular crest line.
Further, the annular crest line is highly 0.1mm away from PET outer tube nozzle 4.2mm, width 0.05mm.
Further, Special punching die includes top plate in the step S3, the first fixed plate set on top plate bottom, if
The second fixed plate in first fixed plate bottom, the cavity in first fixed plate, cavity is fixed on top
The plumage amount spring of inner top, the first formed punch in second fixed plate, be set to second fixed plate in and with it is described
Connected light weight spring at the top of first formed punch, the step surface set on first formed punch bottom end are double on the step surface
Layer module, through the top plate, plumage amount spring, the first fixed plate, the second fixed plate, the first formed punch formed punch duct, be set to institute
The second formed punch and the second formed punch within the cavity stated in formed punch duct are equipped with pressing plate；At the top of the pressing plate with it is described
Plumage amount spring is connected.
Further, the double-deck module matches with the PET outer tube diameter and is set on the step surface
The first module and match with the PP inner tube diameter and the second module that be set to first module bottom, described the
One module height is 4.2mm；Second module is equipped with chamfering, and second formed punch both passes through the first module and the second module,
Second formed punch bottom end and second module bottom distance are 7mm.
Further, the PET outer tube is made of the SK-370Y PP material of SK company, South Korea.
Further, the spring dynamics of the plumage amount spring 9 is greater than the friction of the interference fit insertion PET outer tube 2 of PP inner tube 3
Power, but less than the spring force of 5 top light weight spring 10 of the first formed punch.
Compared with prior art, the invention has the following advantages:
(1) present invention is pressed the inner and outer pipes of Dual-layer vacuum blood taking tube by setting airtight cavity in the environment of vacuum,
So that not having the intrinsic air pressure interference of traditional handicraft in the lacuna formed between inside and outside tube wall when pressing, vacuum, two layers of pipe are formed
The air pressure in lacuna formed between body can subatmospheric power, for inner tube under the action of atmospheric pressure, firm is positioned at rule
Fixed position, it is therefore prevented that inner tube falls off, and avoids the case where being pulled out when extracting cap stopper together with inner tube.
(2) present invention solves the problems, such as to press inner and outer pipes by the way that Special punching die is arranged, and works as Special punching die
When being pressed, Special punching die is moved downward, the bottom of the second punch. contact to inner tube, extremely by PP inner tube push-in outer tube
Stress is slack after PET outer pipe bottom, and Special punching die continues to move downward, and the double-deck module on the first formed punch successively connects
Contact that the orifice plane of PET outer tube and the orifice plane of PP inner tube, inner tube are just press-fit under the annular crest line of PET outer tube
Face, PET outer tube wall inclined-plane and PP inner tube step annulus are interference fitted, and using the plasticity of high molecular material, complete pressing,
It presses close, excellent effect.
(3) cooperation position of inner and outer pipes of the present invention is is interference fitted, and the external draft angle of the nozzle outer annular of inner tube
Degree realizes cricoid squares fit as the inner wall draft angle of outer tube, has been reliably achieved sealing, blood and solvent are not
It can penetrate into the crack of two layers of pipe formation, ensure that the accuracy of blood testing.
(4) present invention is made of setting outer tube of PET material, and inner tube is the SK-370Y PP(poly- third of South Korea SK company
Alkene) material is made, incorporate the strong point of two kinds of materials；The SK-370Y PP(polypropylene of SK company, South Korea) material have it is good
Water preventing ability, hydrophobicity, resistance to gamma irradiation, transparency and intensity solve domestic PP material radiation resistance, transparency are not bad and asks
Topic, while good hydrophobicity makes interior pipe surface that blood wall built-up will not occur in the contact with blood, water retention property is excellent,
And PET (polyethylene terephthalate) material can play antiseep, anti-inner tube be detached from the effects of, have excellent choke,
Water, oiliness energy；Transparency height, anti-gamma irradiation are had excellent performance.
Detailed description of the invention
Fig. 1 is that product bonding processes of the invention start schematic diagram.
Fig. 2 is the outer tube structure figure of Double-layer test tube of the present invention.
Fig. 3 is the inner tube structure figure of Double-layer test tube of the present invention.
Fig. 4 is the finished product structure figure of Double-layer test tube of the present invention.
Fig. 5 is bonding processes intermediate steps schematic diagram of the invention.
Fig. 6 is that bonding processes of the invention finish schematic diagram.
Wherein, the corresponding title of appended drawing reference are as follows:
1- places jig, 2-PET outer tube, 3-PP inner tube, the second formed punch of 4-, the first formed punch of 5-, the second fixed plate of 6-, 7- first
Fixed plate, 8- top plate, 9- plumage amount spring, 10- light weight spring, 11- step surface, the first module of 12-, the second module of 13-, 14-
One stroke, 15- second stroke, 16- annular crest line, 17-PET outer tube inboard wall of tube body inclined-plane, 18- step annulus, 19- step
Formula annulus chamfering, 20- outer tube orifice plane, 21- inner tube orifice plane, 22- lacuna.
Specific embodiment
The invention will be further described with embodiment for explanation with reference to the accompanying drawing, and mode of the invention includes but not only limits
In following embodiment.
Embodiment
Shown in referring to Fig.1, the production method of the Dual-layer vacuum blood taking tube tube body, (S1) prepares for manufacturing double-layer vacuum
The appurtenance of heparin tube tube body, the appurtenance include for provide enough vacuum degree environment can airtight cavity, for pacifying
The placement jig 1 of the double-layer vacuum collection tube tube body double layer material is set, makes the double-layer vacuum collection tube pipe for pressing
The Special punching die of body；
Special punching die includes top plate 8, the first fixed plate 7 set on 8 bottom of top plate, is set to 7 bottom of the first fixed plate
The second fixed plate 6, the cavity in first fixed plate 7, top is fixed on the plumage amount spring 9 of cavity inner top,
The first formed punch 5 in second fixed plate 6, be set in second fixed plate 6 and with the 5 top phase of the first formed punch
Light weight spring 10 even, the step surface 11 set on 5 bottom end of the first formed punch, the double-deck module on the step surface 11,
Through the top plate 8, plumage amount spring 9, the first fixed plate 7, the second fixed plate 6, the first formed punch 5 formed punch duct, be set to described
The second formed punch 4 and the second formed punch 4 within the cavity in formed punch duct are equipped with pressing plate；At the top of the pressing plate with it is described
Plumage amount spring 9 is connected.Its plumage amount spring D spring dynamics is greater than the interference fit insertion PET outer tube tube body 2 of PP inner tube tube body 3
Frictional force, but less than the dynamics of 5 top light weight spring 10 of the second formed punch；It is described bilayer module include and the PET outer tube tube body
The first module 12 that is that 2 internal diameters match and being set on the step surface 11 and match with 3 internal diameter of PP inner tube tube body
And it is set to the second module 13 of 12 bottom of the first module, 12 height of the first module is 4.2mm；Second formed punch 4
The first module 12 and the second module 13 are both passed through, 4 bottom end of the second formed punch and second module bottom distance are 7mm.Plumage
The spring dynamics for measuring spring 9 is greater than the frictional force of the interference fit insertion PET outer tube 2 of PP inner tube 3, but pushes up less than the first formed punch 5
The spring force of portion's light weight spring 10.
Place jig 1 include fixing seat and be set to fixing seat on and slot corresponding with PET outer tube.
(S2) the PET outer tube 2 for making the Dual-layer vacuum blood taking tube tube body, reaches the gas barrier for meeting requirement
Property, resistance to gamma irradiation, transparency and intensity, and 2 inner wall of PET outer tube is equipped with a limit interconnecting piece；PET outer tube is referring to Fig. 2 institute
Show, by high-speed injection molding machine and mold, produces Dual-layer vacuum blood taking tube with PET (polyethylene terephthalate) material
PET outer tube；Limit interconnecting piece includes annular crest line 16 near the 2 inner wall nozzle of PET outer tube and is set to the ring
Inclined-plane 17 on 16 lower section inner wall of shape crest line；PET outer tube 2 designs an annular crest line 16 away from nozzle 4.2mm distance in inner wall,
The height of annular crest line 16 is 0.1mm, protrudes PET outer tube wall 0.05mm, as schemed shown in A after partial enlargement.
(S3) the PP inner tube 3 for making the Dual-layer vacuum blood taking tube tube body reaches the water preventing ability, resistance to for meeting requirement
Gamma irradiation, transparency and intensity, and 3 outer wall of PP inner tube is equipped with the nip portion with the limit interconnecting piece interference fit；Ginseng
According to shown in Fig. 3, PP inner tube 3 uses the SK-370Y PP(polypropylene of SK company, South Korea by high-speed injection molding machine and mold)
Material produces the PP inner tube of Dual-layer vacuum blood taking tube, need to reach the water preventing ability for meeting requirement, hydrophobicity, the spoke of resistance to gamma
According to, transparency and intensity；Nip portion is that step annulus 18 is equipped on the outside of the nozzle of PP inner tube 3, such as figure B after partial enlargement
Shown, height 2.5mm protrudes PP outer wall of inner tube 0.15mm, the draft angle of step annulus 18 and the inner wall inclined-plane of PET outer tube
17 angle is the same；After PP inner tube 3 and PET outer tube 2 complete assembly, the nozzle of PP inner tube 3 is located just at outer tube annular crest line
16 lower section；In order to facilitate the assembly of PP inner tube 3 and PET outer tube 2, have in 18 envisaged underneath of step annulus of PP inner tube 3
The step annulus chamfering 19 of 0.15mm；Fig. 3 denotes the orifice plane 21 of PP inner tube 3；The SK-370Y PP of SK company, South Korea
The product of (polypropylene) material production, because of its hydrophobicity, in the contact with blood blood will not occur for the inner surface of PP inner tube 3
Liquid wall built-up.
(S4) it is described can be in airtight cavity, composition that will be made using the placement jig and Special punching die
It is full of the PET outer tube of mating connection and PP inner tube is pressed, the Dual-layer vacuum blood taking tube tube body is made, and in the pressing
In the process by this can airtight cavity provide high vacuum vacuum environment.
Shown in referring to Fig.1, by Special punching die and place that jig is correspondingly arranged at can be in airtight cavity, PET outer tube is placed
In placing on jig, PP inner tube is placed in PET outer tube；To can airtight cavity carry out being evacuated to -95Kpa.
Referring to Fig.1, Fig. 4, Fig. 5, shown, inner and outer pipes are completed to press in airtight cavity by Special punching die, because
The pressing of product is carried out under vacuum conditions, and it is dry that the lacuna 22 that inside and outside tube wall is formed no longer has the intrinsic air pressure of traditional handicraft
It disturbs, after its partial enlargement of crack 22 as shown in figure C；The order of its work is:
As shown in Fig. 1, Fig. 5, Fig. 6, Special punching die is moved downward, and the second formed punch 4 touches the bottom of PP inner tube 3, by PP
When inner body 3 is pushed into the interior bottom of PET outer tube 2, stress is slack；Special punching die continues to move downward, the first formed punch
5 meeting of chamfering 13 direct product is vertical, and the internal outer tube nozzle of the double-deck module of the first formed punch 5 is pressed, and the first formed punch 5 is put down
Face step 11 contacts compacting with the orifice plane 21 of PP inner tube 3, and Special punching die continues to move downward, the planar table of formed punch 5
Rank 11 contacts compacting with the orifice plane 20 of PET outer tube 2, and the second module 13 is carried out with PET outer tube outward by PP internal tube
Pressing, the first module 12 press PP inner tube tube body with PET outer tube from top to bottom, and PP inner tube tube body 3 is press-fit into
Below the annular crest line 16 of PET outer tube tube body 2；At this point, as shown in fig. 6, plumage amount spring 9, light weight spring 10 are all compressed,
Its distance moved respectively is stroke 15, stroke 14；
Special punching die moves upwards, and the light weight spring 10 of the first formed punch 5 unclamps, pressure failure；The plumage amount bullet of second formed punch 4
Spring 9 continues to exert a force in the bottom of PP inner tube 3, and product is motionless；Special punching die continues up, the plumage amount of the second formed punch 4
Spring 9 unclamps, and pressure failure, product rests on the placement jig 1 of tube body, and pressing work finishes；Due to being in vacuum environment
The product of lower progress is compound, after formed product takes out airtight cavity, the air pressure meeting in lacuna 22 that is formed between two layers of tube body
Subatmospheric power, PP inner tube step annulus 18 is fixed under annular crest line 16 under gas pressure, while step annulus
18 are also more close to inclined-plane, and firm is positioned at defined position, it is therefore prevented that inner tube falls off, and avoids company when extracting cap stopper
The case where being pulled out together with inner tube.
Referring to shown in Fig. 2, Fig. 3, Fig. 4, the inner wall of PET outer tube 2 is combined into interference with matching for the outer wall of PP inner tube tube body 3
Cooperation, the position of interference fit are the step annulus 18 and PET outer tube inboard wall of tube body inclined-plane 17 of inner tube.
The method that the present invention uses is the plasticity using high molecular material, 18 outer diameter of step annulus of inner tube and
The interference numerical value on PET outer tube inboard wall of tube body inclined-plane 17 accomplishes 0.12mm, the step annulus 18 of inner tube and the PET outer tube of outer tube
The angle on inboard wall of tube body inclined-plane 17 is the same, realizes cricoid squares fit, has been reliably achieved sealing, blood and solvent will not
It penetrates into the crack of two layers of pipe formation；The double-deck heparin tube tube body finished is assembled, the pulling capacity F that inner tube can be born is greater than
100N；Product be ensure that in hospital's use process in later period, will not occur to be pulled out when extracting cap stopper together with inner tube
It happens, avoids the blood sample of inspection because inner tube is detached from discarded risk.
The cooperation position of inner and outer pipes is is interference fitted, and the angle on the inner wall inclined-plane 17 of the step annulus 18 of inner tube and outer tube
Degree is the same, realizes cricoid squares fit, has been reliably achieved sealing, and blood and solvent will not penetrate into what two layers of pipe was formed
In crack, the accuracy of blood testing ensure that.
Through the invention production method combination product, incorporate the strong point of 2 kinds of materials, successfully produce antiseep,
Anti- inner tube is detached from, vacuum keep with water retention property is excellent, resistance to gamma or electron beam irradiation sterilization, in material transparent and tube body
The Dual-layer vacuum blood taking tube tube body of the anti-Hemostatic Oral Liquid wall built-up of surface hydrophobicity.
Above-described embodiment is only one of the preferred embodiment of the present invention, should not be taken to limit protection model of the invention
It encloses, as long as that in body design thought of the invention and mentally makes has no the change of essential meaning or polishing, is solved
The technical issues of it is still consistent with the present invention, should all be included within protection scope of the present invention.
Claims (10)
1. a kind of manufacturing method of Dual-layer vacuum blood taking tube tube body, which comprises the following steps:
(S1) prepare the appurtenance for manufacturing Dual-layer vacuum blood taking tube tube body, which includes true enough for providing
Reciprocal of duty cycle environment can airtight cavity be used for for disposing the placement jig (1) of the double-layer vacuum collection tube tube body double layer material
Pressing makes the Special punching die of the double-layer vacuum collection tube tube body；
(S2) the PET outer tube (2) for making the Dual-layer vacuum blood taking tube tube body, reaches the gas barrier for meeting requirement
Property, resistance to gamma irradiation, transparency and intensity, and the PET outer tube wall is equipped with a limit interconnecting piece；
(S3) the PP inner tube (3) for making the Dual-layer vacuum blood taking tube tube body, reaches the water preventing ability for meeting requirement, resistance to gal
Horse irradiation, transparency and intensity, and the PP outer wall of inner tube is equipped with the nip portion with the limit interconnecting piece interference fit；
(S4) it is described can be in airtight cavity, composition that will be made using placement jig (1) and Special punching die
It is full of the PET outer tube (2) of mating connection and PP inner tube (3) is pressed, is made the Dual-layer vacuum blood taking tube tube body, and
In the bonding processes by this can airtight cavity provide high vacuum vacuum environment.
2. a kind of manufacturing method of Dual-layer vacuum blood taking tube tube body according to claim 1, which is characterized in that the step
(S4) the following steps are included:
(S41) will place jig and Special punching die be correspondingly arranged at it is described can be in airtight cavity；
(S42) PET outer tube is placed in and is placed on jig, PP inner tube is placed in PET outer tube；
(S43) to can airtight cavity be evacuated to -90Kpa to -100Kpa；
(S44) Special punching die, which moves downward, presses PET outer tube and PP inner tube, and limit interconnecting piece and nip portion generate
The lacuna (22) that interference fit, PET outer tube and PP inner tube are formed, completes the production of the Dual-layer vacuum blood taking tube tube body.
3. a kind of manufacturing method of Dual-layer vacuum blood taking tube tube body according to claim 2, which is characterized in that the step
(S2) limit interconnecting piece includes the annular crest line (16) being set near PET outer tube (2) the inner wall nozzle and is set to described in
Inclined-plane (17) below annular crest line (16) on inner wall, inclined-plane (17) are that PET outer tube wall tilts inwards.
4. a kind of manufacturing method of Dual-layer vacuum blood taking tube tube body according to claim 3, which is characterized in that the annular
Crest line (16) is highly 0.1mm away from PET outer tube (2) nozzle 4.2mm, width 0.05mm.
5. a kind of manufacturing method of Dual-layer vacuum blood taking tube tube body according to claim 4, which is characterized in that the pressing
Portion is the step annulus (18) on the outside of PP inner tube (3) nozzle.
6. a kind of manufacturing method of Dual-layer vacuum blood taking tube tube body according to claim 5, which is characterized in that the step
Formula annulus (18) is highly 2.5mm, protrudes PP inner tube (3) outer wall 0.15mm, step annulus (18) bottom is equipped with step circle
Ring chamfering (19), step annulus chamfering (19) diameter are 0.15mm, step annulus (18) the outer wall inclined-plane and institute
The inclined-plane for stating PET outer tube (2) inner wall is corresponding, is generated by the inclined-plane of the step annulus outer wall and PET outer tube wall
It is full of cooperation, the interference numerical value that the step annulus (18) and PET outer tube (2) inner wall generate is 0.12mm or so.
7. a kind of manufacturing method of Dual-layer vacuum blood taking tube tube body according to claim 6, which is characterized in that the step
(S4) Special punching die includes top plate (8) in, is set to first fixed plate (7) of top plate (8) bottom, and it is fixed to be set to described first
Second fixed plate (6) of plate (7) bottom, the cavity being set in first fixed plate (7), cavity inner top is fixed on top
Plumage amount spring (9), be set to second fixed plate (6) in the first formed punch (5), be set to second fixed plate (6) in simultaneously
The light weight spring (10) being connected at the top of first formed punch (5), is set to the step surface (11) of the first formed punch (5) bottom end,
The double-deck module on the step surface (11) runs through the top plate (8), plumage amount spring (9), the first fixed plate (7), second
The formed punch duct of fixed plate (6), the first formed punch (5), the second formed punch (4) in the formed punch duct, and it is located at cavity
Interior the second formed punch (4) is equipped with pressing plate；It is connected at the top of the pressing plate with the plumage amount spring (9).
8. a kind of manufacturing method of Dual-layer vacuum blood taking tube tube body according to claim 7, which is characterized in that the bilayer
Module include match with PET outer tube (2) internal diameter and be set to the step surface (11) on the first modules (12) and with
The second module (13) that is that PP inner tube (3) internal diameter matches and being set to the first module (12) bottom, first mould
Block (12) is highly 4.2mm；Second module (12) is equipped with chamfering, and second formed punch (4) both passes through the first module (12)
With the second module (13), the second formed punch (4) bottom end and second module bottom distance are 7mm.
9. a kind of manufacturing method of Dual-layer vacuum blood taking tube tube body according to claim 1, which is characterized in that in the PP
Pipe (3) is made of the SK-370Y PP material of SK company, South Korea.
10. a kind of manufacturing method of Dual-layer vacuum blood taking tube tube body according to claim 7, which is characterized in that the plumage
The spring dynamics for measuring spring (9) is greater than the frictional force of PP inner tube (3) interference fit insertion PET outer tube (2), but less than the first punching
The spring force of light weight spring (10) at the top of head (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910113490.9A CN109820520B (en) | 2019-02-14 | 2019-02-14 | Method for manufacturing double-layer vacuum blood collection tube body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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Cited By (1)
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| CN110497622A (en) * | 2019-09-27 | 2019-11-26 | 江西长青医疗科技有限公司 | Double-layer plastic heparin tube vacuum compounding machine |
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|---|---|
| CN109820520B (en) | 2022-07-15 |
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