CN106017176A - Ultrathin heat pipe for heat dissipation of mobile phone and manufacturing method thereof - Google Patents
Ultrathin heat pipe for heat dissipation of mobile phone and manufacturing method thereof Download PDFInfo
- Publication number
- CN106017176A CN106017176A CN201610568945.2A CN201610568945A CN106017176A CN 106017176 A CN106017176 A CN 106017176A CN 201610568945 A CN201610568945 A CN 201610568945A CN 106017176 A CN106017176 A CN 106017176A
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- Prior art keywords
- heat pipe
- metal tube
- metal
- ultrathin
- ultrathin heat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
Abstract
The invention discloses an ultrathin heat pipe for heat dissipation of a mobile phone and a manufacturing method of the ultrathin heat pipe. The ultrathin heat pipe comprises a metal pipe body, a wire mesh wick and a working medium, wherein the tail portion and the head of the metal pipe body are sealed in a welded manner. A pipe section of the metal pipe body is flat after phase change flattening technology is carried out, so that an airtight inner cavity of the ultrathin heat pipe is formed. The wire mesh wick is formed from a spiral wire mesh or a planar wire mesh or formed by sintering the spiral wire mesh and the planar wire mesh compositely. Generally, the working medium is the liquid which is high in vaporization latent heat and large in specific heat capacity. According to the inner wire mesh structure of the ultrathin heat pipe, a gas channel and a liquid channel are separated and unobstructed, and the overall thickness of the ultrathin heat pipe totally adapts to the narrow heat dissipation space in the mobile phone; the capillary force of the wire mesh wick is large, the backflow resistance of the working medium is small, and therefore the heat transfer property is good; and the wire mesh structure is dense, not prone to disperse and good in mechanical property, and therefore bending and flattening forming of the ultrathin heat pipe are easy. The manufacturing method of the ultrathin heat pipe is simple and stable in technology, suitable for batch production and high in efficiency and yield.
Description
Technical field
The invention belongs to conduction of heat technical field, relate to a kind of hot pipe technique, particularly relate to one
Plant mobile phone heat transmission ultrathin heat pipe and manufacture method thereof.
Background technology
Along with mobile intelligent, the raising of integrated and lightening degree, the property to its processor
Can, if data-handling capacity, communication network ability, high-definition shooting are as disposal ability, high-resolution
The requirement of power output display etc. is higher, power consumption also can increase severely accordingly, and mobile phone instantly
Thickness is typically below 8 millimeters；Owing to thickness is thin, to device interior with CPU, image first-class
The heater element heat radiation being main proposes more harsh requirement.The hands that heat radiation is brought not in time
The serious heating problem of machine, greatly destroys the operation comfort of user, and heating simultaneously brings
Frequency reducing problem directly affects the work fluency of equipment, and mobile phone works long hours higher
At a temperature of, the flying power of equipment can decline to a great extent, the performance of its internal electronic element and life-span
Also can drastically decline.
Heat pipe is a kind of phase-change heat transfer element, has higher heat conductivity and heat power, its
Heat conductivity is tens times of existing metal material and arrives hundred times, but conventional heat pipe is from diameter to thickness
Degree is all difficult in adapt to narrow space in mobile phone, and tradition utilizes the hands of graphite film and heat-conducting glue
Machine heat dissipation technology also meets with bottleneck, therefore is badly in need of the design ultrathin heat pipe towards mobile phone heat radiation.
Mobile phone heat transmission ultrathin heat pipe thickness requirement is the thinnest, and its thickness is much at 0.30-0.60
Millimeter, and the most also need to arrange the gas-liquid channel being separated from each other, to ensure work seasonal epidemic pathogens
Liquid circulation efficient heat transfer.When ultrathin heat pipe makes, tube wall thickness used is generally 0.05-0.10 milli
Rice, manufacturing process easily deforms, ultrathin heat pipe molding simultaneously often also need to through bending and
Flatten.
In prior art, ultrathin heat pipe wick is generally copper powder sintered type, needs in its manufacture process
Inserting metal dust in thin metallic tubd, it is the most difficult to fill out powder operating process, and concordance is difficult to
Ensure, simultaneously thickness also can critical constraints, can only make thickness is the ultra-thin of 0.8-1.5 millimeter
Heat pipe, and when using traditional handicraft to make ultrathin heat pipe, fold easily occurs and subsides, system
Making difficulty very big, inefficiency, yields is low.
Chinese patent (application for a patent for invention number: 201310743998.X) discloses one " tool
Have coaxial braiding capillary structure and the ultrathin heat pipe thereof of the ultrathin heat pipe of fibre bundle ", this ultra-thin heat
The liquid sucting core structure of pipe is the capillary structure that fibre bundle coaxially weaves, and its capillary structure is divided into main biography
Defeated capillary portion and coaxial braiding capillary portion, main transmission capillary portion is tied up by some fibre bundles and forms,
If coaxially braiding capillary portion is interweaved by carried interest and is wound around the silk thread in main transmission capillary portion and forms, often
Stock comprises some.The capillary wick structure of this patent application is the most complicated, manufactures difficulty,
Being difficult to volume production, and its capillary structure diameter is too big, the ultra-thin tube thickness of making is the thickest, it is impossible to
Dispel the heat for mobile phone.
Chinese patent (patent of invention number: ZL 201110417447.5) discloses " a kind of ultra-thin
Heat pipe and manufacture method thereof ", the liquid sucting core structure of this ultrathin heat pipe is groove and powder sintered knot
Structure, general thickness is 0.8-1.5 millimeter, and the body wall thickness used is 0.18-0.3 millimeter,
Its manufacturing process needs carry out filling out powder operation and reducing two operation.The wick of this ultrathin heat pipe
Using powder sintered structure, the thickest being difficult to of its integral thickness is applicable to interior of mobile phone narrow and small heat radiation sky
Between, during it addition, carry out bending technique, on its inboard wall of tube body, the bisque of sintered bond is very easy to
Come off；Its manufacturing process is filled out powder craft simultaneously be difficult to be applicable to length longer (powder is difficult to all
Even it is filled into body afterbody) and thinner thickness (requiring that powder layer thickness is relatively thin, it is difficult to fill)
Ultrathin heat pipe, and when body wall thickness is relatively thin, after sintering circuit, at body material
In the soft state of heat treatment, it is very difficult to (now reducing, body easily occurs to carry out reducing two operation
Distort and subside).So, the ultrathin heat pipe thickness of this patent is blocked up, it is impossible to dispel the heat for mobile phone,
Its ultrathin heat pipe manufacturing process can not be used for making thinner thickness (less than 0.8 millimeter) simultaneously
Ultrathin heat pipe.
As can be seen here, mobile phone heat transmission ultrathin heat pipe is either in structure design or manufacturing process
On, it is required for redesigning or improving.
Summary of the invention
It is an object of the invention to for the problems referred to above, it is provided that a kind of reasonable in design, conductivity of heat
The mobile phone heat transmission ultrathin heat pipe that energy is excellent, the internal wick of ultrathin heat pipe uses screen net structure,
Gas-liquid channel separates and unobstructed, good heat-transfer, and capillary force is big, and working media backflow resistance is little,
It is applicable to mobile phone heat radiation；Its manufacturing approach craft simple and stable, is suitable for batch production, and efficiency is high,
The various deformation during making ultrathin heat pipe and defect can be prevented effectively from；Solve prior art
The problems referred to above occurred.
The technical solution adopted in the present invention is, a kind of mobile phone heat transmission ultrathin heat pipe, comprising:
Metal tube, metal gauze and working media,
Described metal tube wall thickness is 0.05-0.10 millimeter, and its afterbody and the welding of head two ends are close
Envelope, the pipeline section of metal tube becomes flat after technique is flattened in phase transformation, forms the close of ultrathin heat pipe
Close inner chamber；
Described metal gauze, is loaded on the sealed internal chamber of metal tube, is bonded in through high temperature sintering
Metal tube inwall forms the wick of ultrathin heat pipe；
Described working media is filled in the sealed internal chamber of metal tube, and working media is the latent heat of vaporization
Greatly, the fluent material that specific heat capacity is high.
A kind of mobile phone heat transmission ultrathin heat pipe of the present invention, is further characterized in that,
The wick of described metal gauze is single structure, or is composite construction；
The single structure of described metal gauze wick, is burnt by the spiral silk screen with three dimensional structure
Knot forms, and described spiral silk screen is identical with metal tube material solid by tens to up to a hundred
Silk thread rotates braiding through special equipment and prepares, silk thread entirety helically hollow ring, silk thread and silk
Being interweaved between line, staggered helical alignment, spiral silk screen is drawn into flat sintering, sintering
Its bottom surface rear is bonded in metal tube inwall and forms single capillary wick structure；
The single structure of described metal gauze wick, or by having the flat screen of two-dimensional structure
Sintering forms, and described flat screen is by the some solid silk thread warps identical with metal tube material
Special equipment plane orthogonal weave prepares, silk thread and silk thread in " well " font criss-cross arrangement,
After flat screen sintering, bottom surface is bonded in metal tube inwall and forms single capillary wick structure；
The composite construction of described metal gauze wick, by the described taenidium with three dimensional structure
Net and the described flat screen stacked on top of one another laminating sintering with two-dimensional structure, sinter rear screw silk
Net mutually bonds with flat screen upper and lower surface, and the silk screen bottom surface being in lower floor is bonded in metal
Inboard wall of tube body, forms the capillary wick of composite construction.
Described mobile phone heat transmission ultrathin heat pipe integral thickness is 0.30-0.60 millimeter, described metal
The wick integral thickness of body inner wire net is 0.10-0.50 millimeter.
Present invention also offers the manufacture method of a kind of mobile phone heat transmission ultrathin heat pipe, this manufacturer
Method comprises the following steps that: center bar cleaning, center bar drying, center bar heat treatment, silk
The drying of net fixed length, screen bath, silk screen, base pipe fixed length, the afterbody draw, base pipe are cleaned, base
Pipe dry, afterbody welding, wear silk screen, sintering, mark, pull out center bar, annealing, fluid injection,
Evacuation, two except fixed length (abbreviation that secondary degasification processes with fixed length), aligning, head weld,
Bending, flatten, detect, product handling system；It is characterized in that, described center bar is one monolateral to cut
The circle on limit is the most excellent, and insertion end end machining one " C " the type draw-in groove of center bar, inclined-plane is cut simultaneously
Limit, to facilitate use " C " type draw-in groove to block metal gauze, is fed in metal tube.
The manufacture method of mobile phone heat transmission ultrathin heat pipe of the present invention, is further characterized in that,
Described bending technique is carried out on hydraulic press, uses mould to rush curved circular directly-heated
The mode of pipe carries out the molding of metal tube bent angle, can be prevented effectively from metal tube Forging Process pipe
Subsiding occurs in body, it is ensured that bent angle position transition circle is sliding, corrugationless.
Described flattening technique is to use phase transformation to flatten technique to carry out the flattening of circular metal body
Molding, carries out the baking of uniform temperature to circular metal body before i.e. flattening, press during flattening
Flat upper/lower die and metal tube are in pre-Warm status all the time, and intraductal working medium is saturated-vapor state,
Inboard wall of tube body bears outside saturated vapour pressure, and this pressure is played a supporting role in flattening process,
After guaranteeing metal tube flattening, ultrathin heat pipe body smooths, without depression.
Described bending technique is implemented only for non-rectilinear ultrathin heat pipe finished product, straight line ultrathin heat pipe
Without carrying out bending technique step.
Mobile phone heat transmission ultrathin heat pipe integral thickness of the present invention is 0.30-0.60 millimeter, metal tube
The metal gauze wick in internal portion is spiral silk screen, flat screen or spiral silk screen peace face silk
The composite wire structure of net, gas-liquid channel separates and unobstructed, good heat-transfer, it is adaptable to mobile phone
Heat radiation.The liquid sucting core structure of taenidium web frame is tight, is difficult to scatter, and technique is simple；Capillary
Power is big, and working media backflow resistance is little；Metal gauze wick is used to prepare the biography of ultrathin heat pipe
Hot property is stable, and mechanical property is good, it is easy to bends, flatten molding；Use spiral silk screen peace
The metal gauze wick of face silk screen composite construction not only has the excellent of taenidium web frame wick
Point, and use the heat power of its prepared ultrathin heat pipe can be some higher.
The ultrathin heat pipe manufacturing approach craft simple and stable of the present invention, is suitable for batch production, efficiency
Height, yields is high；The making of the 0.05-0.10 millimeter ultra-thin pipe of wall thickness tubing, energy can be completed
The various deformation being prevented effectively from manufacturing process；Ultrathin heat pipe of the present invention bending and pressure
Flat forming method can be prevented effectively from the various folds and depression occurred when making ultrathin heat pipe.
Accompanying drawing explanation
Fig. 1 a, Fig. 1 b are mobile phone heat transmission Ultrathin heat pipe structure schematic diagrams of the present invention；
Fig. 2 a, Fig. 2 b are metal gauze spiral silk screen wick schematic configuration diagram of the present invention；
Fig. 2 c, Fig. 2 d are metal gauze flat screen wick schematic configuration diagram of the present invention；
Fig. 2 e is metal gauze composite construction liquid sucting core structure schematic diagram of the present invention；
Fig. 3 a, Fig. 3 b are the center bar structural representations that the present invention wears that silk screen uses；
Fig. 4 is the manufacturing approach craft step schematic diagram of mobile phone heat transmission ultrathin heat pipe of the present invention；
Fig. 5 a, Fig. 5 b are that the present invention wears silk-screen process step schematic diagram；
Fig. 6 is manufacture method metal tube associated process steps position location of the present invention schematic diagram；
Fig. 7 is mobile phone heat transmission ultrathin heat pipe structural representation after bending technique of the present invention；
Fig. 8 is mobile phone heat transmission ultrathin heat pipe of the present invention structural representation after flattening technique.
Detailed description of the invention
The present invention is described in detail with detailed description of the invention below in conjunction with the accompanying drawings.
A kind of mobile phone heat transmission ultrathin heat pipe, as illustrated in figs. ia and ib, comprising: metal
Body 1, metal gauze 2 and working media；Metal tube 1 wall thickness is 0.05-0.10 millimeter,
Its afterbody and head two ends welded seal, the pipeline section of metal tube 1 becomes after technique is flattened in phase transformation
Flat, forms the sealed internal chamber of ultrathin heat pipe；Metal gauze 2, is loaded on metal tube 1
Sealed internal chamber, is bonded in metal tube 1 inwall through high temperature sintering and forms the imbibition of ultrathin heat pipe
Core；Working media is filled in the sealed internal chamber of metal tube 1, and working media is that the latent heat of vaporization is big,
The fluent material that specific heat capacity is high.
The wick of metal gauze 2 of the present invention is single structure, or is composite construction；Wherein,
The single structure of described metal gauze 2 wick is sintered by the spiral silk screen 21 with three dimensional structure
Forming, as shown in Fig. 2 a, Fig. 2 b, spiral silk screen 21 is by tens to up to a hundred and metal tube
The solid silk thread that body 1 material is identical rotates braiding through special equipment and prepares, and silk thread entirety is helically
Hollow ring, is interweaved between silk thread and silk thread, staggered helical alignment, and spiral silk screen stretches
Becoming flat sintering, after sintering, its bottom surface is bonded in metal tube 1 inwall and forms the suction of single capillary
Wick-containing structure.
The another kind of single structure of metal gauze 2 wick, as shown in Fig. 2 c, Fig. 2 d, by
Flat screen 22 sintering with two-dimensional structure forms, and flat screen 22 is by some and metal
The solid silk thread that body 1 material is identical prepares through special equipment plane orthogonal weave, silk thread and silk
Line is in " well " font criss-cross arrangement, and after flat screen sintering, bottom surface is bonded in metal tube 1
Inwall forms single capillary wick structure.
The composite construction of metal gauze 2 wick, as shown in Figure 2 e, by having three dimensional structure
Spiral silk screen 21 and have two-dimensional structure flat screen 22 stacked on top of one another laminating sintering, sintering
Rear screw silk screen 21 mutually bonds with flat screen 22 upper and lower surface, and is in the silk screen of lower floor
Bottom surface is bonded in metal tube 1 inwall, forms the capillary wick 23 of composite construction.
Ultrathin heat pipe provided by the present invention, mainly includes that metal tube 1, metal gauze 2 are inhaled
Wick-containing, working media.Wherein metal tube 1 constitutes the sealed internal chamber of ultrathin heat pipe；Tinsel
Net 2 wick can be by spiral silk screen 21, or flat screen 22, or both are complex sintered forms；
Main Function is to provide working media vaporization split site, promotes the working media backflow after liquefaction；
Working media is generally liquid (under room temperature), the medium that preferably latent heat of vaporization is big, specific heat capacity is high,
Mixed solvent etc. such as pure water, ethanol and the mixed solvent of pure water, acetone and pure water.
As shown in Figure 3 a, 3 b, the present invention is used for metal gauze 2 is penetrated metal tube 1
The circle that center bar 3 is a monolateral chamfered edge the most excellent, the insertion end end machining one " C " of center bar 3
Type draw-in groove 31, simultaneously inclined-plane chamfered edge, to facilitate use " C " type draw-in groove to block metal gauze, will
It is sent in metal tube 1.
The manufacture method of the present invention a kind of mobile phone heat transmission ultrathin heat pipe, as shown in Figure 4, this system
The method of making comprises the following steps that: center bar cleaning, center bar drying, center bar heat treatment,
The drying of silk screen fixed length, screen bath, silk screen, base pipe fixed length, the afterbody draw, base pipe clean,
Base pipe dry, afterbody welding, wear silk screen, sintering, mark, pull out center bar, annealing, fluid injection,
Evacuation, two except fixed length (abbreviation that secondary degasification processes with fixed length), aligning, head weld,
Bending, flatten, detect, product handling system.
The concrete manufacturing technology steps that the manufacture method of mobile phone heat transmission ultrathin heat pipe of the present invention uses
It is:
Step (1): center bar cleans: determine center bar 3 according to the length of required finished product heat pipe
Length, as shown in Figure 3 a and Figure 3 b shows, this structure is mainly the contour structures of center bar 3
Guarantee that the metal gauze 2 penetrated reaches sintered location, it is ensured that spiral silk screen 21, flat screen
22 or the sintering quality of both stacking composite wires；Aligning arbor 3 is carried out, mainly
Oil removal treatment, it is preferred to use with the cleaning device of ultrasound wave function, cleaning reagent is the hottest de-
Agent.
Step (2): center bar is dried: carry out drying and processing by cleaning complete center bar 3.
Step (3): center bar heat treatment: the center bar 3 after drying is put into reducing atmosphere and burnt
Freezing of a furnace carries out high-temperature heat treatment, primarily to improve the durability of center bar.
Step (4): silk screen fixed length: determine tinsel according to the length of required finished product ultrathin heat pipe
The length of net 2, and cut metal gauze 2 according to this length.
Step (5): screen bath: the metal gauze 2 cut is carried out oil removal treatment.
Step (6): silk screen is dried: carry out drying and processing by cleaning complete metal gauze 2.
Step (7): base pipe fixed length: determine metal tube according to the length of required finished product ultrathin heat pipe
The length of body 1, cuts metal tube 1.
Step (8): the afterbody draw: metal tube 1 afterbody after cutting carries out reducing process,
Afterbody reducing is primarily to facilitate follow-up welding, it is ensured that is formed and seals reliable weld seam.
Step (9): base pipe cleans: the metal tube 1 after processing the afterbody draw is carried out
Process, including oil removal treatment, remove surface oxide layer process etc..
Step (10): base pipe is dried: carry out drying and processing by cleaning complete metal tube 1.
Step (11): afterbody welds: the afterbody reducing position of metal tube 1 is carried out weld
Reason, forms the weld seam sealed, it is preferred to use TIG weld.
Step (12): wear silk screen: use center bar 3 after step (3) heat treatment will
The metal tube 1 that metal gauze 2 penetrates through the welding of step (11) afterbody is internal, it is ensured that gold
Belong to silk screen 2 to be in close contact with metal tube 1 inwall.
As shown in Fig. 5 a, Fig. 5 b, when wearing silk screen, first metal gauze 2 is stretched, by its head
The a bit of 90-degree bent in portion, then metal gauze 2 bending part is snapped in " C " of center bar 3
Hooked in type draw-in groove 31, then metal gauze 2 one side is fitted tightly over center bar 3
Chamfered edge plane on, one side the most slowly use center bar 3 metal gauze 2 is pushed metal tube 1
In, till center bar 3 cannot push." C " type draw-in groove of center bar 3 head design
The effect of fixing metal gauze 2, prevent from pushing during center bar metal gauze 2 with in
Axle 3 chamfered edge plane slide anteroposterior misplaces；The effect of its chamfered edge plane is to send metal gauze 2
During compress metal gauze 2, it is ensured that metal gauze and metal tube 1 inner tight are fitted,
Improve the sintered bond intensity of metal gauze.
Step (13): sintering: the metal tube 1 of metal gauze 2 will be put in step (12)
The center bar 3 inserted together with its inside is put into reducing atmosphere sintering furnace and is carried out high temperature sintering
Process, make metal gauze be bonded in metal tube inwall by high temperature sintering and form ultrathin heat pipe suction
Wick-containing.
Step (14): mark: the metal tube 1 after step (13) is carried out at mark
Reason, i.e. on metal tube 1, that side of sintered metal mesh 2 makes marks process, specifically
Use marking device at the specific part of the side of metal tube 1 sintered metal mesh wick
Stamp and flatten labelling, as shown in Fig. 5 a, Fig. 5 b and Fig. 6, as metal tube 1 sintered gold
Belong to silk screen wick face labelling, this be marked at follow-up flatten time as ultrathin heat pipe positioning datum,
When can avoid flattening metal tube 1, there is deviation ultrathin heat pipe pipe in its interior metal silk screen wick
The phenomenon of body center.
Step (15): pull out center bar: by center bar 3 from the metal tube after mark process
1 inside is extracted.
Step (16): annealing: the metal tube 1 extracting center bar 3 is put into reducing atmosphere and burns
Make annealing treatment in freezing of a furnace, make metal tube 1 inwall and metal gauze wick fully reduce.
Step (17): fluid injection: carry out filling working media to the metal tube 1 after annealing
Operation, i.e. to metal tube 1 internal perfusion working media, the quality of working media is mainly by gold
The working environment belonging to the porosity of wick, the length of finished product heat pipe and heat pipe determines.
Step (18): evacuation: carry out taking out very in being managed by the metal tube 1 of perfusion working media
Vacancy is managed, and utilizes at the mouth of pipe of sealing die extruding cold welding sealing metal body 1；To metal
It is for vacuum higher in realizing pipe that body 1 inside carry out evacuation to process, and reduces work
The boiling temperature of medium, it is ensured that under relatively low operating temperature, working media can be rapidly at inside heat pipe
Vaporization, work of conducting heat normally.
Step (19): two remove fixed length: will be through the metal tube of step (18) evacuation process
1 carries out secondary degasification processes with fixed length, removes metal tube preferably by ebuillition of heated exhaust means
The incoagulable gas of the internal remaining of body 1, improves the vacuum in metal tube 1 further, and
The two of sealing die extruding cold welding sealing metal body 1 is utilized to remove fixed length sealing part, such as Fig. 6 institute
Showing, the sealing part that the distance at this position to afterbody weld is formed after being shorter than evacuation welds to afterbody
Connect the distance at place, then utilize and cut off mould by this two except pipe body part more than fixed length sealing part
Cut off, and be heated in will accumulate in this metal tube 1 position the incoagulable gas risen in the lump by
Remove.
Step (20): aligning: step (19) two is carried out except the metal tube 1 after fixed length
Straightening processing, it is ensured that the reliability of subsequent metal body 1 head welding position and outward appearance concordance.
Step (21): head welds: after aligning, metal tube 1 two is except fixed length cold welding mouth-sealed portion
The head of position carries out soldering, forms reliable spherical weld seam, it is ensured that metal tube 1 head
Sealing reliable, without revealing, head welding preferably employs TIG weld.
Step (22): bending: for non-rectilinear ultrathin heat pipe, uses Bending Mould by step (21)
In metal tube 1 carry out bending forming；Described bending technique is carried out on hydraulic press,
The mode using mould to rush curved circular directly-heated pipe carries out the molding of heat pipe bent angle, can effectively keep away
Exempt from Forging Process heat pipe pipe shaft to occur subsiding, it is ensured that bent angle position transition circle is sliding, corrugationless.Folding
Heat pipe after roll forming is as shown in Figure 7.
Step (23): flatten: use flattening mould is to the heat pipe after bending, according to flattening
Labelling given side, carries out metal tube 1 and flattens molding, reach required thickness.To circle before flattening
Shape heat pipe carries out the baking of uniform temperature, flattens upper/lower die and heat pipe is located all the time during flattening
In pre-Warm status, intraductal working medium is saturated-vapor state, and inboard wall of tube body bears outside saturated steaming
Steam pressure, this pressure is played a supporting role in flattening process, it is ensured that after flattening, ultrathin heat pipe body is put down
Sliding, without depression；As shown in Figure 8, for the mobile phone heat transmission ultrathin heat pipe after flattening molding.
Step (24): detection: the ultrathin heat pipe after flattening molding is detected, including product
Outward appearance detection, size detection and heat transfer property test, reject bad product.
Step (25): product handling system: carry out product handling system to detecting qualified ultrathin heat pipe product,
Including cleaning, polishing, surface passivation etc..
Above-mentioned embodiment is an example of the present invention, is not intended to limit the reality of the present invention
Grant interest field, what all foundations content described in the present patent application scope of patent protection was made etc.
Effect change and modification, all should be included in scope of the present invention patent.
Claims (7)
1. a mobile phone heat transmission ultrathin heat pipe, comprising: metal tube (1), metal gauze (2)
And working media, it is characterised in that
Described metal tube (1) wall thickness is 0.05-0.10 millimeter, and its afterbody and the welding of head two ends are close
Envelope, the pipeline section of metal tube (1) becomes flat after technique is flattened in phase transformation, forms the close of ultrathin heat pipe
Close inner chamber；
Described metal gauze (2), is loaded on the sealed internal chamber of metal tube (1), glues through high temperature sintering
Tie the wick forming ultrathin heat pipe at metal tube (1) inwall；
Described working media is filled in the sealed internal chamber of metal tube (1), and working media is the latent heat of vaporization
Greatly, the fluent material that specific heat capacity is high.
A kind of mobile phone heat transmission ultrathin heat pipe the most according to claim 1, it is characterised in that institute
The wick stating metal gauze (2) is single structure, or is composite construction；
The single structure of described metal gauze (2) wick is by the spiral silk screen (21) with three dimensional structure
Sintering forms, described spiral silk screen (21) by tens to up to a hundred with metal tube (1) material phase
With solid silk thread through special equipment rotate braiding prepare, silk thread entirety helically hollow ring, silk thread with
Be interweaved between silk thread, staggered helical alignment, spiral silk screen be drawn into flat sintering, after sintering its
Bottom surface is bonded in metal tube (1) inwall and forms single capillary wick structure；
The single structure of described metal gauze (2) wick or by the flat screen (22) with two-dimensional structure
Sintering forms, and described flat screen (22) is identical with metal tube (1) material solid by some
Silk thread prepares through special equipment plane orthogonal weave, silk thread and silk thread in " well " font criss-cross arrangement,
After flat screen sintering, bottom surface is bonded in metal tube (1) inwall and forms single capillary wick structure；
The composite construction of described metal gauze (2) wick, by the described taenidium with three dimensional structure
Net (21) and described flat screen (22) the stacked on top of one another laminating sintering with two-dimensional structure, after sintering
Spiral silk screen (21) mutually bonds with flat screen (22) upper and lower surface, and is at the bottom of the silk screen of lower floor
Face is bonded in metal tube (1) inwall, forms the capillary wick (23) of composite construction.
A kind of mobile phone heat transmission ultrathin heat pipe the most according to claim 1, it is characterised in that institute
Stating mobile phone heat transmission ultrathin heat pipe integral thickness is 0.30-0.60 millimeter, in described metal tube (1)
The wick integral thickness of metal gauze (2) is 0.10-0.50 millimeter.
4. a manufacture method for mobile phone heat transmission ultrathin heat pipe, comprises the following steps that: center bar
Cleaning, center bar drying, the drying of center bar heat treatment, silk screen fixed length, screen bath, silk screen, base pipe
Fixed length, the afterbody draw, base pipe clean, base pipe dry, afterbody welding, wear silk screen, sintering, mark,
Pull out center bar, annealing, fluid injection, evacuation, two except fixed length (abbreviation that secondary degasification and fixed length process),
Aligning, head welding, bending, flatten, detect, product handling system；It is characterized in that, described center bar
The circle being a monolateral chamfered edge is the most excellent, insertion end end machining one " C " the type draw-in groove (31) of center bar,
Inclined-plane chamfered edge simultaneously, to facilitate use " C " type draw-in groove (31) to block metal gauze (2), is fed into
In metal tube (1).
The manufacture method of mobile phone heat transmission ultrathin heat pipe the most according to claim 4, it is characterised in that
Described bending technique is carried out on hydraulic press, and the mode using mould to rush curved circular directly-heated pipe is entered
The molding of row metal body (1) bent angle, can be prevented effectively from metal tube (1) Forging Process pipe shaft and occur
Subside, it is ensured that bent angle position transition circle is sliding, corrugationless.
The manufacture method of mobile phone heat transmission ultrathin heat pipe the most according to claim 4, it is characterised in that
Described flattening technique is to use phase transformation to flatten technique to carry out the flattening molding of circular metal body (1),
Before i.e. flattening, circular metal body (1) is carried out the baking of uniform temperature, flattens up and down during flattening
Mould and metal tube (1) are in pre-Warm status all the time, and intraductal working medium is saturated-vapor state, body
Inwall bears outside saturated vapour pressure, and this pressure is played a supporting role in flattening process, it is ensured that metal
After body (1) flattens, ultrathin heat pipe body smooths, without depression.
The manufacture method of mobile phone heat transmission ultrathin heat pipe the most according to claim 5, it is characterised in that
Described bending technique is implemented only for non-rectilinear ultrathin heat pipe finished product, and straight line ultrathin heat pipe is without rolling over
Bending process step.
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