CN104682156B - A kind of pouring method of high density electrical connector - Google Patents

A kind of pouring method of high density electrical connector Download PDF

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Publication number
CN104682156B
CN104682156B CN201410805479.6A CN201410805479A CN104682156B CN 104682156 B CN104682156 B CN 104682156B CN 201410805479 A CN201410805479 A CN 201410805479A CN 104682156 B CN104682156 B CN 104682156B
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CN
China
Prior art keywords
glue
terminal
electric connector
base
embedding
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CN201410805479.6A
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Chinese (zh)
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CN104682156A (en
Inventor
袁翠萍
叶媛媛
夏占军
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北京卫星制造厂
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Priority to CN201410805479.6A priority Critical patent/CN104682156B/en
Publication of CN104682156A publication Critical patent/CN104682156A/en
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Publication of CN104682156B publication Critical patent/CN104682156B/en

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/20Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
    • H01R43/24Assembling by moulding on contact members

Abstract

The present invention relates to a kind of pouring method of high density electrical connector, the pouring method selects suitable casting glue, and the dosing technology that glue cooperation blowing apparatus blow glue is chosen using tinsel, by carrying out precise control to dosing technology, realize high density electrical connector without empty embedding, to meet the highly reliable requirement that high density electrical connector fills joint product, test proves the dress connection quality that can improve high density electrical connector using pouring method of the present invention, it is ensured that pin terminals are fixedly secured;The dosing technology achieves the bubble-free embedding of high density electrical connector, it is ensured that the high reliability of insulating properties and dress connection between terminal;Improve embedding quality;The present invention can promote the embedding suitable for pin-pitch less than the electric connector of 2mm.

Description

A kind of pouring method of high density electrical connector
Technical field
The present invention relates to a kind of pouring method of high density electrical connector, belongs to electric connector encapsulation technology field.
Background technology
For pin-pitch is the small-sized electrical connector of receiving of 0.635mm, luggage connection can only be entered using the method for crimping.With normal In the crimp connector of rule unlike tape insulation body locking device, high density crimp type electric connector is due to pin-pitch Close, the embedding of insulating cement is carried out after needing to assemble crimp, so as to be fixed to crimp, while making between each crimping point Meet insulating requirements.Dosing technology is entirely different with conventional electric connector assembly technology,
Due to receiving, small-sized electrical connector hood space is little, and the density of pin is larger, and glue should avoid bubble in potting process And the generation in cavity.Bubble or cavity are mixed with the embedding colloid of solidification, product appearance quality is not only affected, it is often more important that shadow Ring the electric property and mechanical performance of product.Due to the presence in bubble and cavity, the either internal stress in colloid or external Stress, all prevent it from continuous, Transmit evenly, cause concentration of the stress at bubble and cavity, easily crack or Cracking, makes embedding fail.Therefore, for the embedding of small-sized electrical connector is received, it is important that solving its bubble-free embedding.
Content of the invention
It is an object of the invention to overcoming the above-mentioned deficiency of prior art, there is provided a kind of embedding work of high density electrical connector Process, the pouring method select suitable casting glue, and choose the embedding that glue cooperation blowing apparatus blow glue using tinsel Technique, by carrying out precise control to dosing technology, realize high density electrical connector without empty embedding, to meet high density electricity The highly reliable requirement of connector device joint product.
The above-mentioned purpose of the present invention is mainly achieved by following technical solution:
A kind of pouring method of high density electrical connector, step are as follows:
Step (one), the butt end of base of electric connector is installed on embedding clamp down, makes base of electric connector Docking end face is developed with the bottom surface of embedding clamp, and base of electric connector is fixed by the lock-screw for tightening embedding clamp two ends;
Step (two), with air pressure gun to base of electric connector preheat 5s~10s, 100 DEG C~110 DEG C of air pressure gun temperature, by terminal It is connected with wire, then terminal is loaded by row in the installing hole of base of electric connector insulator;
Step (three), one layer of primer is broken on the insulator of base of electric connector, fix terminal;
Step (four), terminal leveling, concrete grammar is:Base of electric connector is removed from embedding clamp, observation docking The height of end face upper terminal, if there is rugged terminal, is installed to base of electric connector on embedding clamp again, and adjustment is not Flat terminal so as to flush with other terminals;
Step (five), the base of electric connector after terminal leveling is fixed on embedding clamp, upward, embedding is pressed from both sides in encapsulating chamber Tool is lain in a horizontal plane on work top, and the wire that each row is connected with terminal is arranged, and the row of making is separated with the wire of row, is exposed Space between row and row;
Step (six), with tinsel picking glue, move from one side to another side along the horizontally-arranged direction of terminal, when moving The glue on tinsel is blown with de-bubble air pressure gun, glue is uniformly inserted in gap and encapsulating chamber between wire, and is used de-bubble wind Rifle blows glue surface, makes glue surface smooth, and glue surface height is flushed with encapsulating chamber port;The blowing mouth of the de-bubble air pressure gun is elongated circle Cylindricality, a diameter of 2-3mm of cylindrical cross-section;
Cull beyond step (seven), the encapsulating chamber using dehydrated alcohol by wire and base of electric connector is cleaned out;
Step (eight), the base of electric connector for having filled glue is solidified 18~26 hours at room temperature, afterwards by electric connector Pedestal takes out, and embedding is completed.
In the pouring method of above-specified high density electric connector, in step (three), glue used by bottoming glue is DG-3S Glue, the mass ratio with glue are A:B=1.5:1.
In the pouring method of above-specified high density electric connector, in step (six), glue used is STYCAST 2651MM, firming agent are CATALYST 9, and both quality proportionings are:STYCAST 2651MM:CATALYST 9=100:7.
In the pouring method of above-specified high density electric connector, after glue is prepared, degasification need to be carried out using centrifuge Bubble, centrifuge are rotated 2~5 minutes with 1000~3000RPM speed.
In the pouring method of above-specified high density electric connector, in step (three) thickness of primer be 0.5mm~ 1mm.
In the pouring method of above-specified high density electric connector, when adjusting rugged terminal in step (four), First base of electric connector should be preheated using air pressure gun, the time is 5s~10s, soften primer and base of electric connector insulator, Again terminal is adjusted.
In the pouring method of above-specified high density electric connector, in step (six), glue surface allows to be less than encapsulating chamber port 0.5mm~1mm, the glue of climbing on wire are less than 1mm beyond the height of encapsulating chamber port.
In the pouring method of above-specified high density electric connector, it is 0.635mm that base of electric connector is pin-pitch High density electrical connector pedestal.
The present invention is had the advantages that compared with prior art:
(1), the present invention adopts centrifuge before embedding to glue bubble removing, can fast and effectively remove bubble in removing glue liquid; The epoxy pouring sealant for coordinating firming agent CATALYST 9 using STYCAST 2651MM, the viscosity of the glue are relatively low, in high density There is good mobility between the pin of electric connector, while glue is chosen using tinsel, glue be blown into filling using blowing apparatus The process at envelope position, can effectively fill the gap in encapsulation cavity, it is achieved that the bubble-free embedding of high density electrical connector, carry High embedding quality;
(2), the present invention is by the good casting glue of selecting liquidity, and by embedding before stirring, de-bubble, embedding when flow Amount and the precise control to dosing technology, effectively reduce the bubble in casting glue, it is achieved that the depletion of QI of high density electrical connector Bubble embedding, improves embedding quality;
(3), terminal is first fixed by the present invention initially with the mode of bottoming glue, and is beneficial to terminal leveling, and terminal is adjusted Put down laggard trip link actuator embedding, it is ensured that terminal highly consistent, further improve embedding quality.
(4), the present invention adopts the de-bubble air pressure gun of particular design in the encapsulating stage, and the blowing mouth of de-bubble air pressure gun is elongated circle Cylindricality, the circular a diameter of 2-3mm of cylindrical cross-section, the air pressure gun air-out of the structure design are strong, and wind speed is high, with strong points, can be with Make the glue in encapsulating chamber flow, and blow the bubble in breaking glue solution;
(5), test proves the dress connection quality that can improve high density electrical connector using pouring method of the present invention, it is ensured that Pin terminals are fixedly secured;The dosing technology achieves the bubble-free embedding of high density electrical connector, it is ensured that between terminal Insulating properties and dress connection high reliability;The present invention can promote the embedding suitable for pin-pitch less than the electric connector of 2mm.
Description of the drawings
Fig. 1 loads embedding clamp schematic diagram for base of electric connector in the present invention;
Fig. 2 loads base of electric connector schematic diagram for terminal in the present invention;
Fig. 3 is primer embedding schematic diagram in the present invention;
Fig. 4 is embedding effect diagram of the present invention;
Fig. 5 is de-bubble air pressure gun outlet structure for air schematic diagram of the present invention;
Fig. 6 does thermal cycle experiment temperature profile for sample in the present invention.
Specific embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings:
The present invention, can filling high density degree electrical connector pins well in embedding by the good casting glue of selecting liquidity Between space.By the way of bottoming glue, first terminal is fixed, and is beneficial to terminal leveling.It is attached after terminal leveling Glue on iron wire, using the casting glue of iron wire picking bubble removing, is then blown into embedding using de-bubble air pressure gun by the embedding of device Position, iron wire blow glue in movement using de-bubble air pressure gun along the horizontally-arranged gap of terminal, and the dosing technology can make glue successively uniformly right Connector cavity carries out embedding, makes embedding without dead angle, will not produce non-embedding cavity and affect embedding quality.
Specific implementation step of the present invention is as follows:
(1), load embedding clamp schematic diagram for base of electric connector in the present invention;Docking by base of electric connector 1 End is installed on embedding clamp 2 down, the docking end face of base of electric connector 1 is developed with the bottom surface of embedding clamp 2, is tightened filling Base of electric connector 1 is fixed by the lock-screw 3 that binder has 2 two ends, makes 1 non-loosening of base of electric connector, is illustrated in figure 1 this In invention, base of electric connector loads embedding clamp schematic diagram.In the present embodiment, the pin-pitch of base of electric connector 1 is 0.635mm.
(2) 5s~10s is preheated to base of electric connector 1 with air pressure gun, will be used before entering per socket to many plugs of points Air pressure gun is preheated, 100 DEG C~110 DEG C of air pressure gun temperature, and in the present embodiment, preheating time is 10s, and air pressure gun temperature is 110 DEG C.By terminal 4 It is connected with wire 5, then terminal 4 is loaded by row in the installing hole of 1 insulator of base of electric connector, after often loading a row, made 4 outer of terminal is withstood one by one with loading instrument, vertically downward press terminal 4, make the insertion of terminal 4 connect the bottom of device pedestal 1 Portion, is illustrated in figure 2 terminal in the present invention and loads base of electric connector schematic diagram.
(3) on the insulator of base of electric connector 1, one layer of primer 7, is broken, fixes terminal 4, be illustrated in figure 3 this Bright middle primer embedding schematic diagram.Specially:First preheated to base of electric connector 1 with wind blowing gun, preheating time is 10s, Ran Houyong A small amount of glue is stained with by iron wire, moves from one side to another side along 4 row direction of terminal, in movement with de-bubble air pressure gun by iron wire Glue is uniformly blown in the base bottom surface around terminal 4, has been blown a row and has been blown another row again, until 1 bottom surface of whole pedestal is uniform One layer of glued membrane of covering;The thickness of primer 7 is 0.5mm~1mm, is 0.5mm in the present embodiment.After having broken primer, will electrical connection Device pedestal 1 is put into curing oven together with embedding clamp 2, and the temperature of solidification is 80 DEG C, and hardening time is 30 minutes.
7 Embedding Material of primer is DG-3S glue, with glue ratio A:B=1.5:1, dust or miscellaneous should be prevented during with glue Matter is mixed into, and after glue is prepared, need to carry out bubble removing using centrifuge, and centrifuge is rotated 3 minutes with 1000~3000RPM speed, The glue of cooperation must not standing time long, should be finished in 30 minutes.
(4), terminal leveling, concrete grammar is:Base of electric connector 1 is removed from embedding clamp 2, butt end is observed The height of face upper terminal 4, if there is rugged terminal, is installed to base of electric connector 1 on embedding clamp 2 again, adjustment Uneven terminal 4 so as to flush with other terminals 4.When adjusting rugged terminal 4, should be first using hair-dryer to electrical connection Device pedestal 1 is preheated, and the time is 5s~10s, softens primer and 1 insulator of base of electric connector, then terminal 4 is adjusted.
(5), the base of electric connector 1 after terminal leveling is fixed on embedding clamp 2, upward, embedding is pressed from both sides in encapsulating chamber 6 Tool 2 is lain in a horizontal plane on work top, is managed each row's wire 5 with tweezers, and the row of making is separated with the wire 5 of row, exposes row with row Between space.
(6), with tinsel picking glue (in the present embodiment adopt thin wire), along the horizontally-arranged direction of terminal 4 from one side to Another side is moved, and blows glue on tinsel with de-bubble air pressure gun in movement, make glue uniformly insert the gap between wire 5 and In encapsulating chamber 6, encapsulating amount blows glue surface with de-bubble air pressure gun after reaching requirement, makes glue surface smooth, and glue surface height and 6 port of encapsulating chamber Flush;It is illustrated in figure 4 embedding effect diagram of the present invention.Glue used by of the invention is STYCAST2651MM, and firming agent is CATALYST 9, both quality proportionings are:STYCAST 2651MM:CATALYST 9=100:7.After glue is prepared, need to make Bubble removing is carried out with centrifuge, and centrifuge is rotated 3 minutes with 1000~3000RPM speed, and the glue of cooperation must not standing time Long, should be finished in 30 minutes.
De-bubble air pressure gun outlet structure for air schematic diagram of the present invention is illustrated in figure 5, the blowing mouth 8 of de-bubble air pressure gun is elongated circle Cylindricality, a diameter of 2-3mm of cylindrical cross-section, the air pressure gun air-out of the structure design are strong, and wind speed is high, with strong points, can make encapsulating Glue flowing in chamber, and the bubble in breaking glue solution is blown, make glue surface smooth.
The forceps tips that reason line is used should be mellow and full, and corner angle are blunt, in order to avoid puncture or scratch wire insulation;Should keep away during reason line Exempt to pull wire too quickly, in order to avoid wire is caused to damage;
Glue should fill out the whole encapsulating chamber of filling, and wire 5 must not be present between row and row without glue cavity;
In operation, attention is avoided on the wire that glue is bonded at outside encapsulating chamber and other non-encapsulating positions;
, with encapsulating chamber port as flushing benchmark, glue surface is smooth and transition nature for glue surface height;Glue surface allows to be less than encapsulating chamber Port 0.5mm~1mm;Glue of climbing on wire 5 must not exceed 1mm beyond the height of encapsulating chamber port.
(7), the cull beyond the encapsulating chamber 6 using dehydrated alcohol by wire 5 and base of electric connector 1 is cleaned out.
(8), the base of electric connector 1 for having filled glue is solidified 24 hours at room temperature, afterwards base of electric connector 1 is taken Go out, embedding is completed.
(9) electric performance test is carried out according to following technical requirements to testpieces,.
(1), checking is carried out to wire, and contact conducting resistance should be less than 1 Europe.
(2), with Insulation Resistance Tester (table) measure in same wire mutually between disjunct contact, these contacts and institute Have between plug-in unit shell associated therewith and whether they and the insulation resistance between shielding bark graft point meet index request. Under ambient environment, insulation resistance should meet the requirement of 250V/200M Ω.
(3), with Hi-pot Tester to adding 250V/AC voltages in wire between each supply terminals, it is desirable to do not puncture within 30 seconds.
Test proof is carried out respectively to testpieces, the wire electric performance test using dosing technology of the present invention is qualified.
(10), environmental test:Experimental condition is as follows:
(1), sinusoidal vibration
Frequency range 10Hz~200Hz, acceleration:147m/s2 (15g), weight on three each directions mutually perpendicular Multiple 2 times, sweep speed is 2oct/min.
Random vibration test condition
Random experiment is carried out in three mutually perpendicular directions, and each random experiment time is 2min.
(2), impact test
Shock Environmental Condition
(3), thermal cycling test
Thermal cycling test condition and Fig. 6 to be asked for an interview to, every group of testpieces carries out 6.5 circulations (+125 DEG C~-65 DEG C) altogether and be One circulation.
Outward appearance, electrical property inspection are carried out to the testpieces for completing environmental test:
(a), well-tended appearance.
(b), electric performance test is carried out according to step (nine) electric performance test index to testpieces, test result is qualified.
Test proves the dress connection quality that can improve high density electrical connector using pouring method of the present invention, it is ensured that pin Terminal is fixedly secured;The dosing technology achieves the bubble-free embedding of high density electrical connector, it is ensured that exhausted between terminal Edge performance and the high reliability of dress connection.
The present invention can promote the embedding suitable for pin-pitch less than the electric connector of 2mm.
The above, optimal specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, Any those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, Should all be included within the scope of the present invention.
The content not being described in detail in description of the invention belongs to the known technology of professional and technical personnel in the field.

Claims (7)

1. a kind of pouring method of high density electrical connector, it is characterised in that step is as follows:
Step (one), the butt end of base of electric connector (1) is installed on embedding clamp (2) down, makes base of electric connector (1) docking end face is developed with the bottom surface of embedding clamp (2), and the lock-screw (3) for tightening embedding clamp (2) two ends will be electrically connected Device pedestal (1) is fixed;
Step (two), with air pressure gun to base of electric connector (1) preheat 5s~10s, 100 DEG C~110 DEG C of air pressure gun temperature, by terminal (4) it is connected with wire (5), then terminal (4) is loaded by row in the installing hole of base of electric connector (1) insulator;
Step (three), one layer of primer (7) is made a call on the insulator of base of electric connector (1), make terminal (4) fixed;
Step (four), terminal leveling, concrete grammar is:Base of electric connector (1) is removed from embedding clamp (2), it is right to observe Base of electric connector (1), if there is rugged terminal, is installed to embedding clamp by the height of contact surface upper terminal (4) again (2), on, uneven terminal (4) is adjusted so as to flush with other terminals (4);
Step (five), the base of electric connector (1) after terminal leveling is fixed on embedding clamp (2), encapsulating chamber (6) upward, Embedding clamp (2) is lain in a horizontal plane on work top, and the wire (5) that each row is connected with terminal (4) is arranged, the row of making and row Wire (5) separate, expose space between row and row;
Step (six), with tinsel picking glue, move from one side to another side along the horizontally-arranged direction of terminal (4), when moving The glue on tinsel is blown with de-bubble air pressure gun, glue is uniformly inserted in gap and encapsulating chamber (6) between wire (5), is used in combination De-bubble air pressure gun blows glue surface, makes glue surface smooth, and glue surface height is flushed with encapsulating chamber (6) port;The blowing mouth of the de-bubble air pressure gun (8) it is elongated cylinder, a diameter of 2-3mm of cylindrical cross-section;
Step (seven), using dehydrated alcohol by beyond the encapsulating chamber (6) of wire (5) and base of electric connector (1) cull cleaning Totally;
Step (eight), the base of electric connector (1) for having filled glue is solidified 18~26 hours at room temperature, afterwards by electric connector base Seat (1) takes out, and embedding is completed.
2. the pouring method of a kind of high density electrical connector according to claim 1, it is characterised in that:The step (6) in, glue used is STYCAST 2651MM, and firming agent is CATALYST 9, and both quality proportionings are:STYCAST 2651MM:CATALYST 9=100:7.
3. the pouring method of a kind of high density electrical connector according to claim 2, it is characterised in that:The glue After preparing, bubble removing need to be carried out using centrifuge, centrifuge is rotated 2~5 minutes with 1000~3000RPM speed.
4. the pouring method of a kind of high density electrical connector according to claim 1, it is characterised in that:The step (3) in, the thickness of primer (7) is 0.5mm~1mm.
5. the pouring method of a kind of high density electrical connector according to claim 1, it is characterised in that:The step (4) in adjust rugged terminal (4) when, should first using air pressure gun to base of electric connector (1) preheat, the time be 5s~ 10s, softens primer and base of electric connector (1) insulator, then terminal (4) is adjusted.
6. the pouring method of a kind of high density electrical connector according to claim 1, it is characterised in that:The step (6) in, glue surface allows to be less than encapsulating chamber (6) port 0.5mm~1mm, and the glue of climbing on wire (5) exceeds encapsulating chamber (6) port 1mm is highly less than.
7. the pouring method of a kind of high density electrical connector according to claim 1, it is characterised in that:Described it is electrically connected Connect the high density electrical connector pedestal that device pedestal (1) is that pin-pitch is 0.635mm.
CN201410805479.6A 2014-12-19 2014-12-19 A kind of pouring method of high density electrical connector CN104682156B (en)

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CN104682156B true CN104682156B (en) 2017-03-15

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CN105261862B (en) * 2015-10-15 2018-06-22 沈阳兴华航空电器有限责任公司 A kind of micro- rectangular electric connector embedding positioning device
CN105261913B (en) * 2015-10-30 2018-04-10 北京卫星制造厂 A kind of electric connector without hood dosing technology and method of testing
CN105281180B (en) * 2015-11-04 2017-10-27 北京新立机械有限责任公司 A kind of electric connector encapsulating device and its application method
CN105680274A (en) * 2016-01-08 2016-06-15 沈阳兴华航空电器有限责任公司 Filling and sealing technique for stranded elastic contact pin micro-rectangular electric connector
CN105514665A (en) * 2016-01-08 2016-04-20 沈阳兴华航空电器有限责任公司 Technological method for encapsulating micro-rectangular jack electric connector
CN107785764A (en) * 2016-08-31 2018-03-09 南京晨光集团有限责任公司 A kind of electric connector fixing device for dosing technology
CN106304827B (en) * 2016-10-08 2021-03-05 西安西光精细化工有限公司 High-overload-resistant electronic component encapsulating process
CN107991346A (en) * 2017-11-27 2018-05-04 南京越博动力系统股份有限公司 A kind of silicon gel embedding and the method for detection circuit plate
CN110545630A (en) * 2019-09-06 2019-12-06 中国科学院长春光学精密机械与物理研究所 circuit board embedment solidification equipment
CN111431005B (en) * 2020-04-22 2021-01-22 上海航天电子通讯设备研究所 Rectangular electric connector encapsulating equipment and encapsulating method

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