CN106870930A - A kind of manufacture method of LPG gas cylinders - Google Patents
A kind of manufacture method of LPG gas cylinders Download PDFInfo
- Publication number
- CN106870930A CN106870930A CN201710086878.5A CN201710086878A CN106870930A CN 106870930 A CN106870930 A CN 106870930A CN 201710086878 A CN201710086878 A CN 201710086878A CN 106870930 A CN106870930 A CN 106870930A
- Authority
- CN
- China
- Prior art keywords
- manufacture method
- flame
- inner container
- inner bag
- treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/06—Closures, e.g. cap, breakable member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/21—Shaping processes
- F17C2209/2109—Moulding
- F17C2209/2127—Moulding by blowing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/22—Assembling processes
- F17C2209/221—Welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a kind of manufacture method of LPG gas cylinders.The step of methods described includes plastic inner container shaping, the treatment of plastic inner container outer surface, fiber winding and solidifies, metal bottleneck and plastic inner container are carried out into oral area and welds to form bottle mouth of gas cylinder；The plastic inner container outer surface treatment is to carry out flame treatment to the stack shell straightway and two end sockets of inner bag；Solidification temperature is 50 80 DEG C, and hardening time is 48 hours.
Description
Technical field
The present invention relates to pressure vessel manufacturing field.Relate more specifically to a kind of fiber wind full plastic inner container LPG be combined
The manufacture method of gas cylinder.
Background technology
The LP gas cylinder sold in the market uses steel material.Due to steel cylinder exist complex forming technology,
Quality is heavy, it is inconvenient, perishable to transport, have the defects such as explosion accident generation, fiber winding without visuality, using process intermediate frequency
Overall plastic composite cylinder has that lightweight, intensity is high, corrosion-resistant, does not explode, can have an X-rayed, long service life, and maintenance cost is low excellent
The opposite sex can have broad application prospects instead of traditional metal steel cylinder.
There is patent to disclose macromolecular material welding inner bag fiber winding composite cylinder at present, but welding procedure is deposited
In more uncontrollable factor, along with cylinder liner is very thin, welding is more difficult to control；Also patent is disclosed and uses rotational molding technique
Moulding plastics inner bag, process efficiency is low, and the inner bag after rotation molding also needs to perforate operation in addition.
Therefore, this area is in the urgent need to providing a kind of effective plastic inner container forming method and can solve the problem that inner bag and gas
The problem of the sealing of bottleneck.
The content of the invention
The present invention is intended to provide a kind of new plastic inner container winds the manufacture method of LPG composite cylinders entirely.
The invention provides a kind of manufacture method of LPG gas cylinders, methods described includes plastic inner container shaping, outside plastic inner container
The step of surface treatment, fiber winding and solidification, metal bottleneck and plastic inner container are carried out into oral area and welds to form bottle mouth of gas cylinder；Institute
It is to carry out flame treatment to the stack shell straightway and two end sockets of inner bag to state the treatment of plastic inner container outer surface；Solidification temperature is 50-80
DEG C, hardening time is 4-8 hours.
In another preference, metal bottleneck and the inner bag open butt joint that will melt keep 1MPa ± 0.5MPa during docking
Pressure, the dwell time be 8 ± 2 minutes.
In another preference, make heating plate of the temperature more than 200 DEG C while being contacted with inner bag opening and metal bottleneck,
Melt inner bag opening and metal bottleneck.
In another preference, the metal bottleneck includes metalwork and working of plastics.
In another preference, the metal bottleneck is metalwork is embedded in formed in working of plastics compound by injection
Part.
In another preference, the metalwork material is copper or aluminium alloy, and the plastic material is high density polyethylene (HDPE).
In another preference, flame is to make at the flame envelope of flame apart from the distance of outer surface of liner during flame treatment
Reason, makes flame envelope temperature in 1000 DEG C ± 50 DEG C of flame apart from outer surface of liner 10-20 cm treatments 0.5-2 minutes.
In another preference, the inner bag surface tension after flame treatment is more than 50 dynes；Inner bag after flame treatment
Standing time is no more than 3 hours.
In another preference, the interlaminar shear strength of fiber composite used will be in more than 13.8MPa after solidification.
In another preference, outer cover is installed after product solidification.
In another preference, product solidifies and installs outer cover after the assay was approved；The inspection includes the water pressure test, airtight
Experiment.
In another preference, the outer cover is detachable plastic outer cover.
Accordingly, the invention provides a kind of effective plastic inner container forming method and inner bag and gas cylinder mouthful be can solve the problem that
The problem of sealing.
Brief description of the drawings
Fig. 1 is finished product gas cylinder profile；Wherein
A represents plastic-metal composite members, and b represents plastic inner container, and c represents glass fibre.
Fig. 2 is the profile of bottle mouth of gas cylinder plastic-metal composite members.
Fig. 3 is the profile of whorl of bottleneck metalwork；Wherein
1 represents that annular groove 1,2 represents that annular groove 2,3 represents through hole.
Fig. 4 is the top view of bottle mouth of gas cylinder plastic-metal composite members.
Fig. 5 is blow-moulding inner container profile；Wherein
A represents the welding position of inner bag opening and plastic-metal composite members, and B represents the reinforcement part of blow-moulding inner container.
Fig. 6 is the profile of the detachable outer cover of gas cylinder outermost layer；Wherein,
1 represents lid profile on outer cover, and 2 represent outer cover handle section profile, and 3 represent outer cover shell portion profile.
Specific embodiment
With inner bag opening be closely connected metal bottleneck by welding by research extensively and profoundly by inventor, by control
Distance, time of flame treatment processed etc. improve the surface tension of plastic inner container, the connection of reinforced plastics inner bag and fiber composite
Intensity；By controlling the technological parameter such as time and temperature of winding process and solidification, complete fiber laying and winding is completed
The middle low-temperature setting stage afterwards carrys out reinforced plastics inner bag bearing capacity.On this basis, the present invention is completed.
The present invention provides a kind of manufacture method of LPG gas cylinders, including step：Plastic inner container shaping, plastic inner container outer surface
Treatment, fiber winding and product solidification；Further, the water pressure test, air seal test can also be included, and/or installs detachable
Outer cover.
Plastic inner container is molded using blow molding process, and blow-moulding inner container opening (referring to accompanying drawing 5) place is that the thickness of position at A is about
8mm (8 ± 1mm), an inclined-plane, about 45 ° (45 ° of the angle with vertical line are formed at this with after the welding of plastic-metal composite members
± 5 °), the thickness at B is about 12mm (12 ± 2mm) and primarily serves certain support and styling in addition, in addition in gas
The structure can play certain cushioning effect to soldered when pressure moment in bottle increases.Inner bag wall thickness after shaping is general
In 3mm ± 1mm.
Bottle mouth of gas cylinder is welded by inner bag opening and metal bottleneck.The metal bottleneck that will melt and inner bag opening pair
Connect, the pressure of 1MPa ± 0.5MPa is kept during docking, the dwell time is 8 ± 2 minutes.In one embodiment of the invention,
Using plate welding, make heating plate of the temperature more than 200 DEG C while being contacted with inner bag opening and metal bottleneck, make inner bag opening
Melt with metal bottleneck.
Metal bottleneck includes metal material and plastic material.After metal material processing, it is placed on metal in injection mold
The composite members of forming in a plastic material, are then welded on formation gas at inner bag opening by material injection by the way of welding
The bottleneck (referring to accompanying drawing 1) of bottle inner bag.
What groove and via design at metal bottleneck (referring to accompanying drawing 3) 1/2/3 can be connected with reinforced plastics with metalwork
Intensity and reduce the possibility of gas leakage, after the injection more than equal impregnated plastic at three, plastic material is by metalwork bag
The inside is rolled in, the design structure of groove largely avoided the possibility of gas leakage, and because metalwork is completely encapsulated in modeling
Material the inside, so as to it also avoid because material is different, plastic material and metal material caused by swell increment is of different sizes when being heated
The problem for expecting to be layered, the design at particularly 3, plastic material fills hole during injection, forms plastics through metal material, increases
The bonding strength of plastics and metalwork is added, it is also possible to avoid the layering of plastic material and metal material.
In one embodiment of the invention, the metalwork material is copper or aluminium alloy, and the plastic material is height
Density polyethylene.
The inner bag being welded with metal bottleneck outer surface treatment use flame treatment process, due to HDPE be by
Nonpolar polythene material is polymerized, therefore very poor with the adhesive property of resin adhesive liquid, causes plastic inner container to be answered with fiber
Close layer layering；Flame treatment is mainly by high temperature so that plastic material surface frees oxidation reaction polarization group, improves
The surface tension of frosting, so as to improve the glueability of plastics；
After the plastic inner container being welded is cleaned with organic solvent, it is placed on homemade flame processing apparatus, to inner bag
Stack shell straightway and two end sockets carry out flame treatment, and flame treatment uses the gaseous mixture of natural gas and air, should during treatment
Processed with the flame envelope of flame, 1000 DEG C ± 50 DEG C of the temperature control of flame, inner bag surface tension after treatment reaches
More than 47 dynes (preferably more than 50 dynes), should wind as early as possible by the inner bag after flame treatment, and it is small that standing time must not exceed 3
When.
After the outer surface of inner bag has carried out flame treatment, it is possible to use mode commonly used in the art carries out fibre to plastic inner container
Dimension winding, such as but not limited to, the glue mode of entering that glass fibre passes through the rubber roll for speckling with glue, i.e. glass fibre uses enterprising
Glue, controls the tension force of single yarn for 10-15N, then uses four-dimensional numerical control winding machine by fibre according to the winding program finished in advance
Dimension is wound around on plastic inner container, and fiber canoe used can be that ring winding be combined with each other back and forth with spiral winding
The canoe of circulation, it would however also be possible to employ any other canoes that fibre compact can be wrapped on plastic inner container.
Winding raw material used mainly include carbon fiber winding, glass fibre, aramid fiber or other organic fibers
Deng preferably glass fibre, resin adhesive liquid, curing agent and auxiliary agent；The tensile strength of glass fibre is not less than 1.35GPa, and shearing is strong
Degree is not less than 13.8MPa；At 32-45 DEG C, glue temperature is controlled in 30-40 DEG C, environment temperature resin adhesive liquid waters temperature control
Control is at 25-30 DEG C；Glass fibre gel content (the gross weight of the weight/resin adhesive liquid+glass fibre of resin adhesive liquid of single air cylinder
Amount) control in 25%-30%.
In one embodiment of the invention, fibre compact is wrapped in plastic inner container using four-dimensional numerical control winding machine
On, fiber canoe used winds the canoe of the reciprocation cycle that be combined with each other with spiral winding for ring.
Need to carry out product solidification after having carried out fiber winding, solidification temperature is 50-80 DEG C, preferably 70 ± 5 DEG C, hardening time
It is 4-8 hours, preferably 6-8 hours.
In one embodiment of the invention, the product by solidifying can enter water-filling using the conventional outside measurement method in this area
Pressure experiment.
In one embodiment of the invention, detachable outer cover is installed outside the gas cylinder by the water pressure test and air seal test
(referring to accompanying drawing 5), the outer cover can play a protective role.In a kind of preference, the entirety of above-mentioned detachable outer cover
It is made up of three parts, respectively stack shell straightway tailing portion base, handle section and the tagged upper lid of print.Shell is using highly dense
Degree polyethylene (HDPE) material；Shell portion, handle section and the tagged upper lid of print are molded by Shooting Technique, three parts
It is to be connected with the close-fitting mode of buckle or hole by plastics draw-in groove；The thickness of shell portion is 2.5mm, and shell portion is designed with not
Same figure mainly has ellipse, rhombus, pentagon and triangle.
The features described above that the present invention is mentioned, or the feature that embodiment is mentioned can be in any combination.Disclosed in this case specification
All features can be used in combination with any combinations thing form, each feature disclosed in specification, can with it is any provide it is identical,
The alternative characteristics substitution of impartial or similar purpose.Therefore except there is special instruction, disclosed feature is only impartial or similar spy
The general example levied.
Main advantages of the present invention are：
1st, the present invention provides the preparation method that a kind of new plastic inner container winds LPG composite cylinders entirely.
2nd, the invention provides the method that a kind of manufacture of metal bottleneck and metal bottleneck and plastic inner container are combined closely,
The problems such as solving plastic inner container shaping and sealing.
3rd, the invention provides a kind of plastic inner container outer surface handling process, solve plastic inner container and glued with fiber composite
Tie the problem of difference.
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.The experimental technique of unreceipted actual conditions in the following example, generally according to conventional strip
Part or according to the condition proposed by manufacturer.Unless otherwise indicated, otherwise all of percentage, ratio, ratio or number are pressed
Weight meter.The unit in percent weight in volume in the present invention is well-known to those skilled in the art, for example, refer to 100
The weight of solute in the solution of milliliter.Unless otherwise defined, all specialties used in text are ripe with this area with scientific words
Practice meaning familiar to personnel institute identical.Additionally, any method similar to described content or impartial and material all can be applied to
In the inventive method.Preferable implementation described in text only presents a demonstration with material and is used.
Embodiment
Inner bag bottleneck is welded：
1) welding uses plate welding；
2) first bonding machine is preheated before welding, temperature of heating plate is reached 200 DEG C or so, then fixed inner bag
It is good, metal bottleneck is arranged on winding joint in addition；
3) heating plate that will be heated is contacted with inner bag opening and metal bottleneck simultaneously, melts inner bag opening and metal bottleneck
Change, time of contact of heating plate and inner bag opening and metal bottleneck is about 1-4 minutes, i.e. heat time and is about 1-4 minutes, then
Heating plate is removed rapidly, metal bottleneck is docked with inner bag opening, the pressure of 1MPa or so is kept during docking, during pressurize
Between control at 8 minutes or so, to ensure the intensity of welding junction.
Outer surface of liner treatment：
1) after the plastic inner container being welded is cleaned with organic solvent again, it is placed on flame processing apparatus, to the cylinder of inner bag
Body straightway and two end sockets carry out flame treatment；
2) flame treatment uses the gaseous mixture of natural gas and air, to ensure to be carried out using the flame envelope of flame during treatment
Treatment, 1000 DEG C or so of the temperature control of flame, after flame treatment time control will ensure treatment at 1 minute or so, in addition
Inner bag surface tension reaches more than 50 dynes；
3) should be wound as early as possible by the inner bag after flame treatment, standing time is no more than 3 hours.
Using meeting being wound for following resin system requirements：
1) operable time of the resin adhesive liquid in the range of 25-28 DEG C is 3-4 hours；
2) solidification temperature of glue must not exceed 80 DEG C, and optimal solidification temperature is 60 DEG C, and the solidification deadline is that 4-5 is small
When；
3) shear strength after resin system solidification will be in more than 13.8MPa.
Glass fibre passes through the rubber roll for speckling with glue, i.e., using enterprising glue, control the tension force of single yarn for 10-15N, fiber
Winding program is：Ring winds 6 layers, and 3 layers of spiral winding, the ring winding a width of 15mm of fiber band, spiral winding bandwidth is respectively
13mm/`15mm/15mm；Ring winding angle is 90 °, and spiral winding angle is respectively 11.81 °/8 °/11.81 °, after wound and solidified
Gas cylinder burst pressure is not less than 6MPa, and times of fatigue is not less than 3750 times.
Product solidifies：
Solidify 6-8 hours at 70 DEG C after having carried out fiber winding.
The water pressure test：
The water pressure test is carried out using outside measurement method.
Outer cover is installed：
Detachable outer cover is installed by the gas cylinder of the water pressure test and air seal test.
Presently preferred embodiments of the present invention is the foregoing is only, substantial technological content model of the invention is not limited to
Enclose, substantial technological content of the invention is broadly to be defined in the right of application, any technology that other people complete
Entity or method, if identical with defined in the right of application, also or a kind of equivalent change, will
It is considered as being covered by among the right.
Claims (10)
1. a kind of manufacture method of LPG gas cylinders, methods described includes plastic inner container shaping, the treatment of plastic inner container outer surface, fiber
The step of winding and solidification, it is characterised in that metal bottleneck and plastic inner container are carried out into oral area and welds to form bottle mouth of gas cylinder；It is described
The treatment of plastic inner container outer surface is to carry out flame treatment to the stack shell straightway and two end sockets of inner bag；Solidification temperature is 50-80 DEG C,
Hardening time is 4-8 hours.
2. manufacture method as claimed in claim 1, it is characterised in that the metal bottleneck that will melt and inner bag open butt joint is right
The pressure of 1MPa ± 0.5MPa is kept when connecing, the dwell time is 8 ± 2 minutes.
3. manufacture method as claimed in claim 2, it is characterised in that make heating plate of the temperature more than 200 DEG C simultaneously with it is interior
Courage opening and metal bottleneck are contacted, and melt inner bag opening and metal bottleneck.
4. the manufacture method as described in claim any one of 1-3, it is characterised in that the metal bottleneck includes metalwork and modeling
Materials and parts.
5. manufacture method as claimed in claim 4, it is characterised in that the metal bottleneck is that metalwork is embedded in by injection
The composite members formed in working of plastics.
6. manufacture method as claimed in claim 1, it is characterised in that distance of the flame apart from outer surface of liner during flame treatment
For the flame envelope for making flame is processed, make flame envelope temperature in 1000 DEG C ± 50 DEG C of flame apart from 10-20 centimetres of outer surface of liner
Treatment 0.5-2 minutes.
7. the manufacture method as described in claim 1 or 4, it is characterised in that the inner bag surface tension after flame treatment reaches 50
Because of the above；Inner bag standing time after flame treatment is no more than 3 hours.
8. manufacture method as claimed in claim 1, it is characterised in that the interlaminar shear strength of fiber composite used after solidification
Will be in more than 13.8MPa.
9. manufacture method as claimed in claim 1, it is characterised in that install outer cover after product solidification.
10. manufacture method as claimed in claim 9, it is characterised in that the outer cover is detachable plastic outer cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710086878.5A CN106870930A (en) | 2017-02-17 | 2017-02-17 | A kind of manufacture method of LPG gas cylinders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710086878.5A CN106870930A (en) | 2017-02-17 | 2017-02-17 | A kind of manufacture method of LPG gas cylinders |
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| Publication Number | Publication Date |
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| CN106870930A true CN106870930A (en) | 2017-06-20 |
Family
ID=59166892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710086878.5A Pending CN106870930A (en) | 2017-02-17 | 2017-02-17 | A kind of manufacture method of LPG gas cylinders |
Country Status (1)
| Country | Link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339599A (en) * | 2017-08-11 | 2017-11-10 | 天津安易达复合气瓶有限公司 | A kind of nonmetallic inner bag winds composite cylinder and its manufacture method entirely |
| CN108131558A (en) * | 2017-12-31 | 2018-06-08 | 亚普汽车部件股份有限公司 | A kind of high-pressure composite containers plastic inner container seal assembly |
| CN108843965A (en) * | 2018-05-07 | 2018-11-20 | 安徽绿动能源有限公司 | The encapsulating method of the plastic inner container bottleneck of the full wound form composite cylinder of fiber |
| CN111649225A (en) * | 2020-05-26 | 2020-09-11 | 武汉理工大学 | Method for forming plastic inner container of fully-wound composite gas cylinder |
| CN113733459A (en) * | 2021-09-08 | 2021-12-03 | 亚普汽车部件股份有限公司 | Method for forming plastic liner of high-pressure composite container |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107339599A (en) * | 2017-08-11 | 2017-11-10 | 天津安易达复合气瓶有限公司 | A kind of nonmetallic inner bag winds composite cylinder and its manufacture method entirely |
| CN108131558A (en) * | 2017-12-31 | 2018-06-08 | 亚普汽车部件股份有限公司 | A kind of high-pressure composite containers plastic inner container seal assembly |
| CN108843965A (en) * | 2018-05-07 | 2018-11-20 | 安徽绿动能源有限公司 | The encapsulating method of the plastic inner container bottleneck of the full wound form composite cylinder of fiber |
| CN111649225A (en) * | 2020-05-26 | 2020-09-11 | 武汉理工大学 | Method for forming plastic inner container of fully-wound composite gas cylinder |
| CN113733459A (en) * | 2021-09-08 | 2021-12-03 | 亚普汽车部件股份有限公司 | Method for forming plastic liner of high-pressure composite container |
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Application publication date: 20170620 |