CN117894686A - Process for quickly attaching dry film to integrated electroplating etching lead frame - Google Patents
Process for quickly attaching dry film to integrated electroplating etching lead frame Download PDFInfo
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- CN117894686A CN117894686A CN202311571045.XA CN202311571045A CN117894686A CN 117894686 A CN117894686 A CN 117894686A CN 202311571045 A CN202311571045 A CN 202311571045A CN 117894686 A CN117894686 A CN 117894686A
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- lead frame
- protective film
- film
- air
- blowing
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000008569 process Effects 0.000 title claims abstract description 28
- 238000009713 electroplating Methods 0.000 title claims abstract description 7
- 238000005530 etching Methods 0.000 title claims description 6
- 230000001681 protective effect Effects 0.000 claims abstract description 164
- 238000007664 blowing Methods 0.000 claims abstract description 87
- 238000005520 cutting process Methods 0.000 claims abstract description 36
- 230000000903 blocking effect Effects 0.000 claims description 27
- 238000005096 rolling process Methods 0.000 claims description 21
- 238000010030 laminating Methods 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000007747 plating Methods 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 6
- 239000007888 film coating Substances 0.000 claims description 4
- 238000009501 film coating Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 7
- 239000007921 spray Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000010096 film blowing Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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Abstract
The invention relates to the technical field of lead frame production, in particular to a process for quickly attaching a dry film to an integrated electroplating etched lead frame, which comprises a film placing component, a film stretching component and a film forming component, wherein the film placing component is used for flattening and stretching a protective film towards the top of the lead frame so as to attach the protective film to the top of the lead frame; the air blowing component is used for blowing air to the top of the protective film so that the protective film is tightly attached to the top of the lead frame; the cutting and positioning assembly is used for cutting off the protective film after the film pasting of the lead frame is completed, and is matched with the blowing assembly to position and mould the cut end part of the protective film so that the cut end part of the protective film cannot be rewound.
Description
Technical Field
The invention relates to the field of lead frame production, in particular to a process for rapidly attaching a dry film to an integrated electroplating etching lead frame.
Background
The lead frame is used as a chip carrier of an integrated circuit, is a key structural member for realizing the electric connection between an internal circuit lead-out end of the chip and an external lead by means of bonding materials and forming an electric loop, plays a role of a bridge connected with an external lead, and most of semiconductor integrated blocks need to use the lead frame, thus being an important basic material in the electronic information industry.
The prior art discloses the invention patent of some lead frame pad pasting, and chinese patent of application number 201821836881.0 discloses a lead frame pad pasting device, including the body, PLC controller, operating button and display instrument are installed to the front end of body, and film feeding mechanism, yellow membrane section of thick bamboo and useless membrane section of thick bamboo are installed to the rear end of body, and the mid-mounting of body has workstation actuating mechanism and slidable mounting to have the lead frame workstation on the workstation actuating mechanism, installs swing pad pasting mechanism on the lead frame workstation, and film feeding mechanism, workstation actuating mechanism and swing pad pasting mechanism all are connected with the PLC controller electricity.
In the prior art, after the film pasting of the lead frame is completed, the protective film needs to be cut off after the film coating of the lead frame is completed, but the port part of the film may be rewound after the film is cut off, so that the condition that the port part is not tightly attached to the top of the lead frame is easily caused, and unnecessary trouble is brought to subsequent work.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a process for quickly attaching a dry film to an integrated electroplating etching lead frame.
In order to achieve the above purpose, the invention adopts the following technical scheme: the integrated electroplating etching lead frame fast dry film pasting process includes the following steps:
step one: placing the lead frame needing to be pasted on a film laminating device for transportation, so that the lead frame moves according to a preset route;
step two: blowing the top of the lead frame in the film by a film laminating device, so that the protective film is fully attached to the lead frame;
step three: after the lead frame film is adhered, the film laminating device cuts off and positions the end part of the protective film so as to avoid the port rollback of the protective film;
step four: the film laminating device starts the lead frame with the film transferred and laminated to move again;
the film laminating device in the first to fourth steps includes:
the conveying assembly is used for conveying the lead frame to be pasted with the film;
the housing is arranged at the top of the conveying assembly;
the film placing assembly is used for flattening and pulling the protective film towards the top of the lead frame so that the protective film is attached to the top of the lead frame;
the air blowing component is used for blowing air to the top of the protective film so that the protective film is tightly attached to the top of the lead frame;
and the cutting-off positioning assembly is used for cutting off the protective film after the lead frame film pasting is completed and positioning and shaping the cut end part of the protective film by matching with the blowing assembly so that the cut end part of the protective film cannot be rewound.
Preferably, the blowing assembly includes:
the sliding frames are symmetrically and fixedly connected to the two side walls of the housing;
a bellows slidably connected between the two carriages;
the air inlet machines are provided with a plurality of air inlet machines which are fixedly arranged on the outer wall of the air box;
a first pushing member for pushing the bellows to move along the carriage;
the two blowing pieces are fixedly communicated with the air box through air conveying hoses;
the side plates are symmetrically and fixedly connected to the side wall of the bellows in the same group;
the rotating rods are arranged, each rotating rod is rotatably connected between the two side plates at the corresponding position, and the rotating rods are rotatably connected with the air blowing pieces at the corresponding positions.
Preferably, the method further comprises:
the connecting rod is coaxially connected with the rotating rod;
the baffle seat is fixedly connected to the end part of the connecting rod;
the first torsion spring is fixedly arranged between the baffle seat and the side plate and sleeved on the outer wall of the connecting rod;
and the stop block is fixedly connected to the bottom of the sliding frame.
Preferably, the method further comprises:
the air baffle box is in a shape like a Chinese character 'ji', is connected to the side wall of the air box in a sliding way and is used for guiding air blown out by the air blowing piece from the central part of the protective film to two sides so as to enable the protective film to be tightly attached to the top of the lead frame;
and the second pushing piece is used for pushing the wind shielding box to move so as to adjust the relative position between the wind shielding box and the wind box.
Preferably, the method further comprises:
the air inlet is formed in one side, close to the air box, of the air box;
the plug connector is fixedly communicated with one side, close to the wind blocking box, of the wind box;
the heating wire is arranged in the wind shielding box and used for heating air entering the wind shielding box;
the shower nozzle is provided with two sets of, and the symmetry is fixed to be linked together in the bottom of fender bellows is used for in-process that cuts off the locating component cuts off the protection film, blow the wind regime after the heating perpendicularly downwards to realize the location, and utilize hot-blast to mould the type to the protection film.
Preferably, the cutting and positioning assembly comprises:
a cutter for cutting off the protective film after the film coating is completed;
the cutter is fixedly connected to the bottom of the cutter holder and used for fixedly mounting the cutter;
the driving piece is used for pushing the tool apron to move upwards or downwards;
and the positioning piece is used for positioning the two end parts of the protective film after the cutting of the cutter is completed, so that the end parts of the protective film cannot be rewound.
Preferably, the positioning member includes:
the sliding groove is formed in the side wall of the tool apron;
the grooving is formed in two parts and symmetrically formed in the top of the tool apron;
the sliding rod is connected to the inside of the sliding groove in a sliding way;
the power piece is fixedly arranged in the sliding groove and used for pushing the sliding rod to slide along the sliding groove;
the T-shaped blocks are provided with two sliding rods which are fixedly connected between the two T-shaped blocks, and the two T-shaped blocks are respectively and slidably connected to the tops of the two grooves;
and the rolling parts are arranged at two sides of the cutter respectively, and extend to the bottom of the slot after penetrating through the slot correspondingly, and are used for positioning the end part of the protective film.
Preferably, the rolling member includes:
the round groove is formed in the bottom of the T-shaped block;
the elastic rod is rotationally connected to the inside of the circular groove;
the limiting disc is fixedly connected to the outer wall of the elastic rod;
the second torsion spring is fixedly connected between the circular groove and the limiting disc and sleeved on the outer wall of the fixing part of the elastic rod;
the support is fixedly connected to the bottom end of the elastic rod;
and the rolling cylinders are rotatably arranged at the bottoms of the two supports and used for rolling and positioning the end parts of the cut protective films.
Preferably, the method further comprises:
the two gears are respectively and fixedly connected to the outer walls of the telescopic ends of the two elastic rods;
the rack is provided with two racks which are respectively fixed in the grooves at corresponding positions.
Preferably, the blowing member includes:
the air storage box is fixedly connected to the outer wall of the rotating rod and fixedly communicated with the air box through a plurality of air transmission hoses;
the automatic blowing heads are provided with a plurality of blowing heads, and all the automatic blowing heads are fixedly communicated with the side wall of the gas storage tank.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the arrangement of the blowing component, wind pressure generated by a wind source blown out by the blowing component acts on the top of the protective film, so that the protective film and the lead frame are fully flattened and attached, and because the protective film and the lead frame are fragile, the protective film is pressurized in a blowing mode, so that the mechanical component is prevented from directly contacting with the protective film, and the situation of damaging the protective film and the lead frame is reduced.
2. According to the invention, through the arrangement of the wind blocking box, the wind source flows towards the edges of the two sides of the protective film along the central part of the wind blocking box when the wind blowing piece blows, so that different parts of the protective film can be tightly adhered to the lead frame, and the wind is blocked by the wind blocking box, so that the air is discharged towards the two sides when flowing, and the air is prevented from remaining at the edges.
3. According to the invention, through the arrangement of the heating wire, hot air is vertically blown to the top of the protective film through the spray head, and the protective film is assisted to be positioned, meanwhile, the hot air flows at the port of the protective film, so that the shaping of the protective film is facilitated, the adhesion between the protective film and the lead frame is maintained, and the occurrence of the condition of back winding at the end part of the protective film is reduced.
Drawings
FIG. 1 is a schematic illustration of the process flow of the present invention.
Fig. 2 is a schematic diagram of the overall structure of the film sticking device of the present invention.
Fig. 3 is a schematic diagram of the overall structure of the film sticking device of the present invention.
Fig. 4 is a schematic structural view of the present invention after being sectioned along a housing.
Fig. 5 is a schematic diagram of a second embodiment of the present invention after being sectioned along a housing.
Fig. 6 is a schematic view of the structure of the connection of the carriage and the bellows of the present invention.
Fig. 7 is an enlarged view of the structure of fig. 6 a in accordance with the present invention.
FIG. 8 is a schematic view of the connection between the bellows and the first pushing member according to the present invention.
FIG. 9 is a schematic view of the structure of the wind blocking box of the present invention.
FIG. 10 is a schematic plan view of the junction of the bellows and the bellows of the present invention.
FIG. 11 is a schematic diagram showing a second structure of the connection between the bellows and the first pushing member.
FIG. 12 is a schematic view of the present invention in cross section along the wind box.
Fig. 13 is a schematic view showing the structure of the junction between the cutter and the holder according to the present invention.
Fig. 14 is an enlarged view of the structure of fig. 13B in accordance with the present invention.
Fig. 15 is a schematic structural view of the tool holder of the present invention.
Fig. 16 is a schematic view showing the structure of the joint between the sliding rod and the elastic rod according to the present invention.
In the figure: 1. a housing; 2. a chassis; 3. a conveyor; 4. a shielding frame; 5. a driving motor; 6. unreeling wheel; 7. a first pull roll; 8. a second traction roller; 9. a third traction roller; 10. a fourth traction roller; 11. a carriage; 12. a wind box; 13. a wind inlet machine; 14. a first pusher; 15. a gas hose; 16. a side plate; 17. a rotating rod; 18. a connecting rod; 19. a blocking seat; 20. a first torsion spring; 21. a stop block; 22. a wind blocking box; 23. an air inlet; 24. a plug; 25. a heating wire; 26. a spray head; 27. a cutter; 28. a tool apron; 29. a driving member; 30. a chute; 31. slotting; 32. a slide bar; 33. a power member; 34. a T-shaped block; 35. a circular groove; 36. an elastic rod; 37. a limiting disc; 38. a second torsion spring; 39. a support; 40. a rolling cylinder; 41. a gear; 42. a rack; 43. a gas storage tank; 44. an automatic blowing head; 45. and a second pushing member.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
An integrated plating etched lead frame rapid dry film process as shown in fig. 1 to 16, comprising the steps of:
step one: placing the lead frame to be pasted with the film on a conveying assembly for transportation, so that the lead frame moves according to a preset route;
step two: blowing the top of the lead frame in the film by a film laminating device, so that the protective film is fully attached to the lead frame;
step three: after the lead frame film pasting is completed, the film laminating device cuts off and positions the end part of the protective film, so that the protective film is prevented from being rewound;
step four: the conveying component starts the lead frame with the film being conveyed to move again;
the film laminating device in the first to fourth steps comprises:
the conveying assembly is used for conveying the lead frame to be pasted with the film;
a housing 1 provided on the top of the conveying assembly;
the film placing assembly is used for flattening and pulling the protective film towards the top of the lead frame so that the protective film is attached to the top of the lead frame;
the air blowing component is used for blowing air to the top of the protective film so that the protective film is tightly attached to the top of the lead frame;
the cutting and positioning assembly is used for cutting off the protective film after the film pasting of the lead frame is completed, and positioning and shaping the end part of the cut protective film by matching with the blowing assembly so that the end part of the cut protective film cannot be rewound;
in the prior art, after the film pasting of the lead frame is completed, the protective film needs to be cut off after the film pasting of the lead frame is completed, but the situation that the port part of the film is rewound can be caused easily, and further the situation that the port part is not tightly attached to the top of the lead frame is caused easily, so that unnecessary trouble is brought to subsequent work;
after the film pasting is completed, the cutting and positioning assembly starts to work, the protective film after the film pasting is completed is cut through the cutting and positioning assembly, and the port of the protective film after the protective film is cut is limited in the cutting process, so that the condition that the protective film is cut and is rewound due to corresponding force is avoided, the protective film is continuously blown by being matched with the blowing assembly, the protective film is also favorably attached to the lead frame tightly, and the condition that the end of the protective film is rewound is avoided;
and through the setting of subassembly of blowing, the in-process that bloies makes the adhesion at nearby dust by blowing away to be favorable to cleaning protection film and lead frame, make protection film and lead frame inseparabler laminating.
As an alternative embodiment, the conveying assembly comprises a bottom frame 2, two sides of the bottom frame 2 are provided with shielding frames 4, the top of the bottom frame 2 is fixedly provided with a conveyor 3, and the conveyor 3 consists of existing components such as a conveying motor, a belt pulley, a conveying belt and the like, which are not illustrated one by one;
the shielding frame 4 is used for shielding the side edges of the lead frame to avoid the lead frame from shifting during the transportation process of the conveyor 3.
As an alternative embodiment, the film releasing assembly includes:
the driving motor 5 is fixedly arranged on the outer wall of the housing 1 through a mounting plate, and the output shaft end of the driving motor 5 penetrates through the housing 1 and is fixedly connected with an unreeling wheel 6;
the first traction roller 7 is rotationally connected to the inner wall of the housing 1 in an up-down symmetrical manner;
the second traction roller 8 is rotationally connected to the inner wall of the housing 1 in an up-down symmetrical manner, and the first traction roller 7 and the second traction roller 8 are positioned on the same horizontal line;
a third traction roller 9 rotatably connected to the inner wall of the housing 1 and positioned at the bottom of the protective film;
a fourth traction roller 10 rotatably connected to the inner wall of the housing 1 and located at the top of the protective film;
specifically stated, firstly, the end part of the protective film sequentially passes through each traction roller, the end part of the protective film is placed on the top of the lead frame and is attached to the lead frame, after the protective film is placed, the driving motor 5 and the conveyor 3 are synchronously started, the lead frame is conveyed through the conveyor 3, the driving motor 5 rotates to drive the unreeling wheel 6 to rotate, so that the protective film is unreeled, and the film attaching on the top of the lead frame is realized.
As a further embodiment, the blowing assembly includes:
the sliding frames 11 are symmetrically and fixedly connected to the two side walls of the housing 1;
a bellows 12, the bellows 12 being slidably connected between the two carriages 11;
a plurality of air inlet fans 13 which are fixedly arranged on the outer wall of the air box 12;
a first pushing member 14 for pushing the bellows 12 to move along the carriage 11;
the two blowing pieces are fixedly communicated with the air box 12 through air hoses 15;
the side plates 16 are arranged, each two of the side plates are in a group, and the side plates 16 in the same group are symmetrically and fixedly connected to the side wall of the air box 12;
the number of the rotating rods 17 is two, each rotating rod 17 is rotationally connected between the two side plates 16 at the corresponding position, and the rotating rods 17 are rotationally connected with the air blowing pieces at the corresponding positions;
specifically, when the film is adhered, the air inlet fan 13 is started, air is conveyed to the inside of the air box 12 through the air inlet fan 13, then the air in the air box 12 is blown to the top of the protective film by the air blowing piece, and the air blowing direction is inclined towards the protective film due to the inclined arrangement of the air blowing piece, so that the protective film is pressed to the top of the lead frame by the air source blown by the air blowing piece, so that the protective film is tightly adhered to the top of the lead frame, meanwhile, the first pushing piece 14 pushes the air box 12 to move along the middle of the two sliding frames 11 towards the direction of the cutting and positioning assembly, and air between the protective film and the lead frame is helped to be discharged by using air pressure, so that the occurrence of bubbles generated after the protective film is adhered to the lead frame is reduced;
after the protective film is cut off by the cutting assembly, the air source blown by the blowing member can apply acting force to the port part of the cut protective film, the port part of the protective film is smoothed by blowing air to the port part of the protective film, the situation that the protective film is rewound after being cut off is avoided, and therefore the port of the protective film is positioned by the air source matched with the cutting positioning assembly blown by the blowing member, and the protective film is tightly attached to the lead frame.
As an alternative embodiment, the first pushing member 14 may be an air cylinder or an electric push rod, the fixing portion of the pushing member is fixed on the top of one of the carriages 11, and the telescopic end of the pushing member is fixedly connected with the bellows 12 through a straight plate.
As a further embodiment, further comprising:
the connecting rod 18, the connecting rod 18 is connected with the rotating rod 17 coaxially;
a baffle seat 19 fixedly connected to the end of the connecting rod 18;
the first torsion spring 20 is fixedly arranged between the baffle seat 19 and the side plate 16 and sleeved on the outer wall of the connecting rod 18;
a stopper 21 fixedly connected to the bottom of the carriage 11;
specifically, in the above embodiment, it is mentioned that the air source can blow to the top of the protective film better by obliquely arranging the air blowing member, but when the air blowing member moves to the cutting and positioning assembly, if the air blowing member blows to the top of the protective film obliquely, the air source may not blow to the end of the protective film directly, and the smoothing effect on the end of the protective film may be poor;
therefore, when the rotating rod 17 moves towards the cutting and positioning assembly, the connecting rod 18 is driven to move, the connecting rod 18 drives the blocking seat 19 to move, the blocking seat 19 can be contacted with the stop block 21 after moving to a certain distance, then the blocking seat 19 continues to move, the blocking seat 19 can deflect and give way under the obstruction of the stop block 21, the blocking seat 19 rotates to drive the connecting rod 18 to rotate, the connecting rod 18 rotates to drive the air blowing piece to deflect for a certain angle, so that the air blowing piece is regulated to be parallel to the top of the protective film by oblique air blowing, and in the process of cutting the protective film by the cutting and positioning assembly, the air blowing source is favorable for acting on the top of the protective film, the air blowing source blown by the air blowing piece is favorable for avoiding the rewinding of the protective film when the port of the protective film is rewound, and the cutting and positioning assembly is favorable for positioning the end position of the protective film;
then, when the device returns, the first torsion spring 20 releases the spring force to drive the baffle seat 19 to return, so that the next use is facilitated.
As a further embodiment, further comprising:
a wind blocking box 22 which is in a shape of a Chinese character 'ji' and is connected to the side wall of the wind box 12 in a sliding manner, and is used for guiding wind blown by the blowing piece from the central part of the protective film to two sides so as to enable the protective film to be closely attached to the top of the lead frame;
a second pushing member 45 for pushing the air blocking box 22 to move so as to adjust the relative position between the air blocking box 22 and the air box 12;
specifically, in the above embodiment, it is mentioned that the air blowing member is provided to blow the top of the protective film to exhaust the air between the protective film and the lead frame, so as to avoid the air bubble, but if only the top of the protective film is blown, part of the air may remain at the edges of both sides of the protective film and the lead frame, thereby affecting the bonding effect;
therefore, because the wind blocking box 22 is in a shape like a Chinese character 'ji', when the second pushing piece 45 pushes the wind blocking box 22 to move towards the cutting and positioning assembly, enough abdication space is reserved, so that the movement interaction between the wind blocking box 22 and the wind blocking box is avoided, the wind blocking box 22 and the wind blocking box can synchronously move, the wind blocking box 22 is arranged above the protective film and is not in contact with the protective film, the wind blowing path of the wind blocking box 22 is used for blocking the wind blowing path of the wind blowing box, the wind source can flow towards the edges of the two sides of the protective film along the central part of the wind blocking box 22 when the wind blowing box blows, and therefore, different parts of the protective film can be tightly attached to the lead frame, and air can be discharged towards the two sides when the wind flows through the blocking box 22, and the air is prevented from remaining at the edges;
and in the process that the blowing piece deflects, the second pushing piece 45 can drive the wind baffle box 22 to move upwards, so that the wind baffle box 22 can not shield the blowing of the blowing piece parallel to the top of the protective film, and the port of the protective film is smoothed after the cut protective film is cut off, and the port rollback of the protective film is avoided.
As an alternative embodiment, the second pushing member 45 is specifically a hydraulic cylinder, a fixed portion of the hydraulic cylinder is fixed to the top of the bellows 12, and a telescopic end of the pushing member is fixedly connected to the bellows 12 through a joint plate.
As a further embodiment, further comprising:
the air inlet 23 is formed in one side, close to the air box 12, of the air baffle box 22;
the plug-in connector 24 is fixedly communicated with one side of the air box 12 close to the air baffle box 22;
the heating wire 25 is arranged in the air baffle box 22 and is used for heating the air entering the air baffle box 22;
the spray heads 26 are provided with two groups, are symmetrically and fixedly communicated with the bottom of the wind shielding box 22, and are used for vertically and downwards blowing the heated wind source in the process of cutting off the protective film by the cutting-off positioning assembly so as to realize positioning and shaping the protective film by hot air;
specifically, in the above embodiment, it is mentioned that by adjusting the blowing direction of the blowing member so that the blowing member blows in parallel to the top of the protective film, the flowability of the wind source is used to apply a force to the port portion of the protective film, so that the protective film is not rewound after being cut by the cutting and positioning assembly, and although the protective film can be smoothed and compacted by blowing, if the cutting and positioning assembly finishes returning and the blowing member stops blowing and returns, the protective film still returns to generate slight rewinding, which causes incomplete adhesion between the protective film and the lead frame;
therefore, through setting up a plurality of shower nozzles 26 in the bottom of the case 22 that keeps out the wind, when the second push rod piece drives the case 22 that keeps out wind and upwards remove for air intake 23 and plug 24 coincidence intercommunication, the air current can get into the inside of keeping out wind case 22 through plug 24 this moment to by heater strip 25 heating, at this moment, the piece of blowing stops blowing, shower nozzle 26 begins work, vertically blows hot-blast to the top of protection film through shower nozzle 26, when carrying out assistance localization real-time to the protection film again, utilize hot-blast to flow at the port of protection film, be favorable to moulding the protection film, maintain laminating between protection film and the lead frame, be favorable to reducing the condition that the protection film tip takes place the rollback and take place.
As a further embodiment, the cutoff positioning assembly comprises:
a cutter 27 for cutting off the protective film after the film coating is completed;
the cutter holder 28, the cutter 27 is fixedly connected to the bottom of the cutter holder 28, and is used for fixedly mounting the cutter 27;
a driving member 29 for pushing the tool holder 28 to move upward or downward;
positioning pieces for positioning both end portions of the protective film after the cutting of the cutter 27 is completed so that the end portions of the protective film are not rewound;
specifically, when cutting is needed, the conveying assembly stops working, then the driving piece 29 is started, the cutter holder 28 is pushed to move downwards through the driving piece 29, the cutter holder 28 drives the cutter 27 to move downwards, the cutter 27 cuts off the protective film, in the process, the positioning piece is firstly contacted with the protective film and applies slight pressure, when the cutter 27 continues to move downwards for cutting, the positioning piece is abdied, so that the cutter 27 cuts off the protective film, and therefore the situation that the protective film is not rewound after being cut off is avoided due to the arrangement of the positioning piece, because the positioning piece is provided with two groups, the other group of positioning pieces position the other port of the film, and follow-up continuous film covering is facilitated.
As an alternative embodiment, the driving element 29 is embodied as an electric push rod, the driving element 29 being fixedly mounted to the inner top surface of the housing 1 by means of a connecting seat.
As a further embodiment, the positioning member includes:
a sliding groove 30 formed on the side wall of the tool post 28;
the two slots 31 are symmetrically arranged at the top of the tool apron 28;
a slide rod 32 slidably connected to the inside of the chute 30;
a power member 33 fixedly installed inside the chute 30 for pushing the sliding rod 32 to slide along the inside of the chute 30;
the two T-shaped blocks 34 are arranged, the sliding rod 32 is fixedly connected between the two T-shaped blocks 34, and the two T-shaped blocks 34 are respectively and slidably connected to the tops of the two grooves 31;
the two rolling parts are respectively positioned at two sides of the cutter 27, extend to the bottom of the slot 31 after penetrating through the corresponding slot 31, and are used for positioning the end part of the protective film;
specifically, the movement of the tool apron 28 drives the sliding rod 32 to move downwards, the sliding rod 32 drives the T-shaped block 34 to move downwards, the downward movement of the T-shaped block 34 drives the rolling piece to move downwards, and when the cutter 27 does not cut the protective film yet, slight pressure is applied to the top of the protective film by the rolling piece so as to limit the protective film, so that the condition of rewinding after the protective film is cut off is avoided;
after the protection film is cut off, the power piece 33 pushes the sliding rod 32 to slide along the sliding groove 30, the sliding rod 32 moves to drive the T-shaped block 34 to move, and the T-shaped block 34 drives the rolling piece to move, so that the protection film is flattened through the movement of the rolling piece, the spray head 26 sprays hot air to the port at the moment, the protection film becomes soft and easy to shape because of the blown hot air, and the protection film on the passing path is compacted through the rolling piece, so that the protection film is attached to the lead frame, and the attachment of the end part of the protection film to the lead frame is facilitated.
As an alternative embodiment, the power member 33 is specifically an electric push rod, and the power member 33 is fixedly installed inside the chute 30.
As a further embodiment, the roll-in member includes:
a circular groove 35 formed at the bottom of the T-shaped block 34;
an elastic rod 36 rotatably connected to the inside of the circular groove 35;
the limiting disc 37 is fixedly connected to the outer wall of the elastic rod 36;
the second torsion spring 38 is fixedly connected between the circular groove 35 and the limiting disc 37 and sleeved on the outer wall of the fixed part of the elastic rod 36;
a support 39 fixedly connected to the bottom end of the elastic rod 36;
a rolling cylinder 40 rotatably installed at the bottoms of the two supports 39 for rolling and positioning the cut end portions of the protective film;
specifically, after the roller 40 contacts with the protective film, the elastic rod 36 is compressed to be in a yielding position, so that the roller 40 can rotate on the support 39 by being adapted to the track of the cutter 27 moving downwards, and the roller 40 can roll along the top of the protective film in the pushing process of the roller 40, so that the friction force is reduced, and the damage to the protective film is reduced.
As a further embodiment, further comprising:
the gears 41 are arranged in two and fixedly connected to the outer walls of the telescopic ends of the two elastic rods 36 respectively;
the racks 42 are provided with two slots 31 which are respectively fixed in corresponding positions;
specifically, the elastic rod 36 moves to drive the gear 41 to move, after the gear 41 contacts with the rack 42, the gear 41 can be driven to rotate, the gear 41 can drive the elastic rod 36 to rotate in the circular groove 35, the elastic rod 36 rotates to drive the support 39 to rotate, and the support 39 drives the rolling cylinder 40 to rotate, so that the rolling cylinder 40 deflects after moving to the edge of the protective film, and the protective film is straightened by the rolling cylinder 40 in the deflecting process, which is favorable for maintaining the tight state of the protective film and avoiding the occurrence of wrinkles.
As a further embodiment, the air blowing member includes:
the air storage box 43, the air storage box 43 is fixedly connected to the outer wall of the rotating rod 17, and the air storage box 43 is fixedly communicated with the air box 12 through a plurality of air transmission hoses 15;
the automatic blowing heads 44 are provided in plurality, and all the automatic blowing heads 44 are fixedly communicated with the side wall of the gas storage tank 43;
specifically, the air in the bellows 12 enters the air storage box 43 through the air pipe, and is then blown out from the automatic blowing head 44, which is beneficial to blowing air onto the protective film.
The working principle of the invention is as follows:
the protective film is unreeled through the film unreeling component, so that the protective film is attached to the top of the lead frame, meanwhile, the film blowing component is controlled to start to work, the top of the protective film is blown through the film blowing component, wind pressure generated by a wind source blown out by the film blowing component acts on the top of the protective film, the protective film and the lead frame are fully flattened and attached, the protective film and the lead frame are fragile, so that the protective film is pressurized in a blowing mode, mechanical parts are prevented from directly contacting the protective film, the situation that the protective film and the lead frame are damaged is avoided, the blowing component also moves towards the direction of the cutting and positioning component in the blowing process, the blowing component moves towards the direction of the cutting and positioning component while blowing, and air between the protective film and the lead frame is discharged by utilizing wind pressure in the moving process, and the situation that bubbles are generated after the protective film and the lead frame are attached is reduced is facilitated;
after the film pasting is completed, the cutting and positioning assembly starts to work, the protective film after the film pasting is completed is cut off through the cutting and positioning assembly, and the port after the protective film is cut off is limited in the cutting process, so that the protective film is prevented from being cut off under the condition that the corresponding force is used for winding, the protective film is continuously blown by the matching blowing assembly, the protective film and the lead frame are also favorably attached tightly, and the winding of the end part of the protective film is avoided.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, but rather, the foregoing embodiments and description illustrate the principles of the invention, and that various changes and modifications may be effected therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (10)
1. The process for quickly attaching the dry film to the integrated electroplating etching lead frame is characterized by comprising the following steps of:
step one: placing the lead frame needing to be pasted on a film laminating device for transportation, so that the lead frame moves according to a preset route;
step two: blowing the top of the lead frame in the film by a film laminating device, so that the protective film is fully attached to the lead frame;
step three: after the lead frame film is adhered, the film laminating device cuts off and positions the end part of the protective film so as to avoid the port rollback of the protective film;
step four: the film laminating device starts the lead frame with the film transferred and laminated to move again;
the film laminating device in the first to fourth steps includes:
the conveying assembly is used for conveying the lead frame to be pasted with the film;
a housing (1) arranged on top of the conveying assembly;
the film placing assembly is used for flattening and pulling the protective film towards the top of the lead frame so that the protective film is attached to the top of the lead frame;
the air blowing component is used for blowing air to the top of the protective film so that the protective film is tightly attached to the top of the lead frame;
and the cutting-off positioning assembly is used for cutting off the protective film after the lead frame film pasting is completed and positioning and shaping the cut end part of the protective film by matching with the blowing assembly so that the cut end part of the protective film cannot be rewound.
2. The integrated plating etched lead frame rapid dry film process of claim 1, wherein the air blowing assembly comprises:
the sliding frames (11) are symmetrically and fixedly connected to the two side walls of the housing (1);
a bellows (12), said bellows (12) being slidingly connected between two of said carriages (11);
the air inlet machines (13) are arranged in a plurality and are fixedly arranged on the outer wall of the air box (12);
a first pushing member (14) for pushing the bellows (12) to move along the carriage (11);
the two blowing pieces are fixedly communicated with the air box (12) through air hoses (15);
the side plates (16) are arranged, every two side plates are in a group, and the side plates (16) in the same group are symmetrically and fixedly connected to the side wall of the air box (12);
the two rotating rods (17) are arranged, each rotating rod (17) is rotatably connected between the two side plates (16) at the corresponding position, and the rotating rods (17) are rotatably connected with the air blowing piece at the corresponding position.
3. The integrated plating etched lead frame rapid dry film process of claim 2, further comprising:
the connecting rod (18), the said connecting rod (18) is connected with said turning rod (17) coaxially;
the baffle seat (19) is fixedly connected to the end part of the connecting rod (18);
the first torsion spring (20) is fixedly arranged between the baffle seat (19) and the side plate (16) and sleeved on the outer wall of the connecting rod (18);
and the stop block (21) is fixedly connected to the bottom of the carriage (11).
4. The integrated plating etched lead frame rapid dry film process of claim 2, further comprising:
a wind blocking box (22) which is in a shape like a Chinese character 'ji' and is connected to the side wall of the wind box (12) in a sliding way, and is used for guiding wind blown by the blowing piece from the central part of the protective film to two sides so as to enable the protective film to be tightly attached to the top of the lead frame;
and a second pushing member (45) for pushing the wind shielding box (22) to move so as to adjust the relative position between the wind shielding box (22) and the wind box (12).
5. The integrated plating etched lead frame rapid dry film process of claim 4, further comprising:
the air inlet (23) is formed in one side, close to the air box (12), of the wind box (22);
a plug-in connector (24) fixedly communicated with one side of the air box (12) close to the wind shielding box (22);
the heating wire (25) is arranged in the wind shielding box (22) and is used for heating air entering the wind shielding box (22);
the shower nozzle (26) is provided with two groups, and is symmetrically and fixedly communicated with the bottom of the wind shielding box (22) and used for blowing the heated wind source downwards vertically in the process of cutting off the protective film by the cutting-off positioning assembly so as to realize positioning and shaping the protective film by hot air.
6. The integrated plating etched lead frame rapid dry film process of claim 2, wherein the cutoff positioning assembly comprises:
a cutter (27) for cutting off the protective film after the film coating is completed;
the cutter (27) is fixedly connected to the bottom of the cutter holder (28) and used for fixedly mounting the cutter (27);
a driving member (29) for pushing the tool holder (28) up or down;
and the positioning piece is used for positioning the two end parts of the protective film after the cutting of the cutter (27) is finished, so that the end parts of the protective film cannot be rewound.
7. The process for rapid dry film attachment of an integrated electroplated etched lead frame of claim 6, wherein said positioning member comprises:
the sliding groove (30) is formed in the side wall of the tool apron (28);
the two slots (31) are symmetrically arranged at the top of the tool apron (28);
a slide rod (32) which is connected to the inside of the chute (30) in a sliding manner;
the power piece (33) is fixedly arranged in the sliding groove (30) and used for pushing the sliding rod (32) to slide along the inner part of the sliding groove (30);
the T-shaped blocks (34) are arranged, the sliding rods (32) are fixedly connected between the two T-shaped blocks (34), and the two T-shaped blocks (34) are respectively and slidably connected to the tops of the two grooves (31);
and two rolling parts are arranged and are respectively positioned at two sides of the cutter (27), and the two rolling parts penetrate through the corresponding grooves (31) and then extend to the bottoms of the grooves (31), and the rolling parts are used for positioning the end parts of the protective films.
8. The process for rapid dry film lamination of an integrated electroplated etched lead frame according to claim 7, wherein the roll press comprises:
the round groove (35) is formed in the bottom of the T-shaped block (34);
an elastic rod (36) rotatably connected to the inside of the circular groove (35);
the limiting disc (37) is fixedly connected to the outer wall of the elastic rod (36);
the second torsion spring (38) is fixedly connected between the circular groove (35) and the limiting disc (37) and sleeved on the outer wall of the fixing part of the elastic rod (36);
the support (39) is fixedly connected to the bottom end of the elastic rod (36);
and the rolling cylinders (40) are rotatably arranged at the bottoms of the two supports (39) and are used for rolling and positioning the cut end parts of the protective films.
9. The integrated plating etched lead frame rapid dry film process of claim 8, further comprising:
the two gears (41) are respectively fixedly connected to the outer walls of the telescopic ends of the two elastic rods (36);
and racks (42) which are provided with two slots (31) respectively fixed at corresponding positions.
10. The integrated plating etched lead frame rapid dry film process according to claim 9, wherein the blowing member comprises:
the air storage box (43), the air storage box (43) is fixedly connected to the outer wall of the rotating rod (17), and the air storage box (43) is fixedly communicated with the air box (12) through a plurality of air transmission hoses (15);
the automatic blowing heads (44) are arranged in a plurality, and all the automatic blowing heads (44) are fixedly communicated with the side wall of the gas storage tank (43).
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| CN202311571045.XA CN117894686B (en) | 2023-11-23 | 2023-11-23 | Process for quickly attaching dry film to integrated electroplating etching lead frame |
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| CN202311571045.XA CN117894686B (en) | 2023-11-23 | 2023-11-23 | Process for quickly attaching dry film to integrated electroplating etching lead frame |
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| CN117894686B CN117894686B (en) | 2024-06-14 |
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