CN211531461U - Ladder printing laser template - Google Patents
Ladder printing laser template Download PDFInfo
- Publication number
- CN211531461U CN211531461U CN202020262229.3U CN202020262229U CN211531461U CN 211531461 U CN211531461 U CN 211531461U CN 202020262229 U CN202020262229 U CN 202020262229U CN 211531461 U CN211531461 U CN 211531461U
- Authority
- CN
- China
- Prior art keywords
- hole
- steel mesh
- reinforcing plate
- laser template
- printing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007639 printing Methods 0.000 title claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 60
- 239000010959 steel Substances 0.000 claims abstract description 60
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 31
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 230000003044 adaptive effect Effects 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 238000007649 pad printing Methods 0.000 claims 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract description 26
- 239000006071 cream Substances 0.000 abstract description 18
- 230000008021 deposition Effects 0.000 abstract description 13
- 229910000679 solder Inorganic materials 0.000 description 11
- 238000001125 extrusion Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000005476 soldering Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Abstract
The utility model relates to the technical field of steel meshes, in particular to a ladder printing laser template, which adopts the technical proposal that a reinforcing plate is arranged above the steel mesh and is detachably connected with the steel mesh; the printing holes comprise a first through hole and a second through hole, the opening area of the first through hole is larger than that of the second through hole, a groove communicated with the second through hole is formed in the upper surface of the steel mesh, and the opening area of the groove is larger than that of the second through hole; the reinforcing plate is provided with a mounting groove communicated with the first through hole and the groove in a penetrating mode. The upper surface of steel mesh is provided with the recess that communicates with the second through-hole, and the height that recess and second through-hole coincidence are subtracted to the height of second through-hole is the deposition thickness of tin cream on less pad promptly, and the deposition thickness of tin cream on great pad is promptly to the height of first through-hole, through setting up the printing hole of co-altitude not to can satisfy the required tin cream deposition thickness of different pads, thereby can effectively improve printed circuit board's quality.
Description
Technical Field
The utility model belongs to the technical field of the steel mesh technique and specifically relates to a ladder printing laser template is related to.
Background
In the manufacturing process of electronic products, surface mount technology is used to solder various components to a printed circuit board. The surface mount process flow generally includes: and coating solder paste on one surface to be welded of the PCB, then mounting the components to be welded on the corresponding positions of the PCB, performing reflow soldering after the mounting of the components is completed, thus completing the mounting of the components on one surface of the PCB, and completing the surface mounting after the inspection is qualified.
The process of applying solder paste on a PCB substrate, the amount of applied solder is a key factor affecting the quality of soldering, and the amount of solder is determined by the shape and size of the opening of the steel mesh. The excellent steel mesh opening design can ensure good demoulding effect, can not cause welding short circuit, open circuit or produce tin balls, and ensures good hardware connection and welding reliability.
The steel mesh, that is, the SMT template, is a SMT special mould, and its main function is the deposit of help tin cream, and the purpose is to transfer the accurate position on empty PCB with the tin cream of accurate quantity. In the existing SMT printing process, multiple printing templates are used for printing different thicknesses of solder paste deposited on the same printed circuit board for multiple times, namely the thickness of each printing template corresponds to the thickness of one solder paste deposited, and the thickness of each printing template determines the thickness of the solder paste deposited.
The prior Chinese patent with the publication number of CN208424964U discloses an SMT steel mesh, which comprises a plurality of printing holes in one-to-one correspondence with bonding pads, wherein each printing hole is a kidney-shaped hole, each printing hole comprises a first opening portion positioned at two ends, a second opening portion positioned in the middle and a third opening portion connected with the first opening portion and the second opening portion, the first opening portion and the second opening portion are arranged in a rectangular mode, the third opening portion is in an isosceles trapezoid shape, and the width of the second opening portion is 0.55-0.85 times that of the first opening portion.
However, the above-mentioned prior art has the following drawbacks: when the aforesaid steel mesh is used to deposit the tin cream on the printed circuit board as required, because the highly uniform in every printing hole, the pad that great printing hole corresponds needs more tin cream to weld, the pad that less printing hole corresponds needs less tin cream to weld, nevertheless because its highly uniform in the printing hole of the different open area size of steel mesh, the demand of tin cream volume when being difficult to satisfy different pad welding, can cause the tin cream volume on some less pads too much or the tin cream volume on the great pad too little, thereby influence printed circuit board's quality.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a ladder printing laser template that can effectively improve printed circuit board quality, which is not enough for prior art.
The above object of the present invention is achieved by the following technical solutions: a step printing laser template comprises a steel mesh, wherein a plurality of printing holes which correspond to the positions of matched printed circuit board pads one to one are arranged on the steel mesh in a penetrating manner, a reinforcing plate is arranged above the steel mesh, and the reinforcing plate is detachably connected with the steel mesh; the printing holes comprise a first through hole and a second through hole, the area of the opening of the first through hole is larger than that of the opening of the second through hole, a groove communicated with the second through hole is formed in the upper surface of the steel mesh, and the area of the opening of the groove is larger than that of the opening of the second through hole; the reinforcing plate is provided with a mounting groove communicated with the first through hole and the groove in a penetrating mode.
Through adopting above-mentioned technical scheme, the upper surface of steel mesh is provided with the recess that communicates with the second through-hole, and the height that recess and second through-hole coincidence are subtracted to the height of second through-hole is the deposition thickness of tin cream on less pad promptly, and the height of first through-hole is the deposition thickness of tin cream on great pad promptly, through setting up the printing hole of co-altitude not to can satisfy the required tin cream deposition thickness of different pads, thereby can effectively improve printed circuit board's quality. And the template can realize different tin paste deposition thicknesses by one-time printing, so that the production efficiency can be effectively improved. On the other hand, the strength of the steel mesh can be effectively increased due to the arrangement of the reinforcing plate.
The present invention may be further configured in a preferred embodiment as: two adjacent grooves are communicated and are provided with connecting grooves.
By adopting the technical scheme, due to the arrangement of the connecting grooves, the tin paste can be conveniently smeared, so that the effect of convenience in operation can be achieved.
The present invention may be further configured in a preferred embodiment as: the area of the reinforcing plate is larger than that of the steel mesh, and a connecting plate is arranged between the reinforcing plate and the steel mesh and is in a step shape.
Through adopting above-mentioned technical scheme, the stability of being connected between reinforcing plate and the steel mesh can effectively be increased in the setting of connecting plate, and the connecting plate is the echelonment setting, can be when the increase strength, reduces manufacturing cost.
The present invention may be further configured in a preferred embodiment as: the upper surface of steel mesh is provided with the guide bar, be provided with the guide way that is used for supplying the guide bar to stretch into on the reinforcing plate.
Through adopting above-mentioned technical scheme, the setting of guide bar and guide way is convenient for install the steel mesh on the reinforcing plate accurately.
The present invention may be further configured in a preferred embodiment as: the cross section of the guide rod is arranged in a triangular shape.
Through adopting above-mentioned technical scheme, because the cross-section of guide bar is triangle-shaped, can further be convenient for the guide bar stretch into in the constant head tank to can further be convenient for the installation and the location of steel mesh.
The present invention may be further configured in a preferred embodiment as: the steel mesh is characterized in that a positioning block is arranged on the upper surface of the steel mesh, a positioning groove for the positioning block to extend into is formed in the reinforcing plate, and the positioning block is elastically connected with the positioning groove.
Through adopting above-mentioned technical scheme, the locating piece stretches into in the constant head tank, and locating piece and constant head tank elastic connection to can be in the same place steel mesh and reinforcing plate are fixed.
The present invention may be further configured in a preferred embodiment as: the locating piece is the cross setting, the constant head tank is the cross of pegging graft with the locating piece adaptation.
Through adopting above-mentioned technical scheme, the locating piece all is the cross setting with the constant head tank, inserts the locating piece in the constant head tank to can further increase the stability of being connected between steel mesh and the reinforcing plate.
The present invention may be further configured in a preferred embodiment as: the guide bars are provided with two, and the locating piece sets up between two guide bars.
Through adopting above-mentioned technical scheme, back in inserting the guide bar guide way, its locating piece stretches into the constant head tank, because the locating piece setting can play the effect of promotion to the locating piece between two guide bars to can be further convenient for stretch into the constant head tank with the locating piece.
To sum up, the utility model discloses a following at least one useful technological effect:
1. through the arrangement of the first through hole, the second through hole, the mounting groove and the groove, the quality of the printed circuit board can be effectively improved;
2. the tin paste can be conveniently smeared by arranging the connecting grooves;
3. through the setting of connecting plate, locating piece, constant head tank, can improve the stability of being connected between reinforcing plate and the steel mesh.
Drawings
Fig. 1 is a schematic view of the overall structure shown in the embodiment of the present invention;
fig. 2 is a cross-sectional view of a form shown in an embodiment of the invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
fig. 4 is an enlarged view of a portion B in fig. 2.
In the figure, 1, a steel mesh; 11. printing holes; 12. a first through hole; 13. a second through hole; 14. connecting grooves; 2. a reinforcing plate; 21. mounting grooves; 22. a connecting plate; 23. a guide bar; 25. positioning blocks; 26. connecting blocks; 27. and a butt joint block.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a ladder printing laser template, including steel mesh 1, run through on the steel mesh 1 and be provided with a plurality of and the position one-to-one printing hole 11 of supporting printed circuit board pad.
Referring to fig. 2 and 3, in the present embodiment, the printing hole 11 includes a first through hole 12 and a second through hole 13, and the first through hole 12 has an open area larger than that of the second through hole 13, and the upper surface of the steel net 1 is provided with grooves communicating with the second through hole 13, the open area of the grooves is larger than that of the second through hole 13, and two adjacent grooves communicate with each other and are formed with a connection groove 14. And the reinforcing plate 2 is provided with an installation groove 21 communicated with the first through hole 12 and the groove in a penetrating way. When the tin paste brush is used, the printed circuit board is placed below the steel mesh 1, the printing holes 11 in the steel mesh 1 correspond to the pads of the printed circuit board one by one, then the tin paste is placed on the upper surface of the steel mesh 1, and the tin paste is uniformly coated on the printed circuit board through the tin paste brush. And the arrangement of the connecting groove 14, make the height of the second through hole 13 subtract the height that the recess coincides with second through hole 13 and be the deposition thickness of the solder paste on the minor pad, the height of the first through hole 12 is the deposition thickness of the solder paste on the major pad, through setting up the printing hole 11 of different heights, thus can satisfy the required solder paste deposition thickness of different pads, thus can effectively improve the quality of printed circuit board.
Referring to fig. 4, the area of reinforcing plate 2 is greater than the area of steel mesh 1, and the bottom mounting of reinforcing plate 2 is provided with connecting plate 22, and connecting plate 22 is the echelonment setting, and connecting plate 22 is connected with steel mesh 1, can increase the stability of being connected between steel mesh 1 and reinforcing plate 2, and the setting of echelonment, when increasing connection stability, can reduce manufacturing cost.
Referring to fig. 4, two guide rods 23 are arranged on the upper surface of the steel mesh 1 and at four corners of the steel mesh 1, and a guide groove for the guide rods 23 to extend into is formed in the reinforcing plate 2. Be provided with locating piece 25 between two guide bars 23, and be provided with the constant head tank that supplies locating piece 25 to stretch into between two guide slots, locating piece 25 adopts the rubber material, and it has elasticity. In this embodiment, locating piece 25 is the cross setting, and locating piece 25 includes connecting block 26 and butt piece 27, and connecting block 26 is perpendicular crisscross setting with butt piece 27, and the constant head tank includes extrusion groove and butt groove, and extrusion groove is perpendicular crisscross setting with butt groove, and the open area in extrusion groove is less than the open area in butt groove. When the installation steel mesh 1, stretch into the guide bar 23 corresponding guide way in, simultaneously, the extrusion inslot is filled in with butt piece 27 to connecting block 26 to make butt piece 27 and butt groove offset, thereby can stretch into the constant head tank with locating piece 25 in, thereby can further increase the connection stability between steel mesh 1 and the reinforcing plate 2.
The implementation principle of the embodiment is as follows:
when the steel mesh 1 is installed, the guide rod 23 is stretched into the corresponding guide groove, meanwhile, the connecting block 26 and the butt block 27 are extruded into the extrusion groove under the action force of pushing, the butt block 27 is abutted to the butt groove, the positioning block 25 can be stretched into the positioning groove, and the steel mesh 1 and the reinforcing plate 2 are firmly fixed. After stretching into the locating piece 25 in the constant head tank, fix between with steel mesh 1 and connecting plate 22 and between reinforcing plate 2 and steel mesh 1 through glue, can further increase the connection stability between steel mesh 1 and the reinforcing plate 2.
During the use, place the printed circuit board in the below of steel mesh 1 and make the position one-to-one of pad on printing hole 11 and the printed circuit board on the steel mesh 1, then place the tin cream on the upper surface of steel mesh 1, because the setting of spread groove 14, the distance of diapire to the printed circuit board of spread groove 14 has been reduced, make the height that highly subtracts recess and second through-hole 13 coincidence of second through-hole 13 be the deposition thickness of tin cream on less pad promptly, the height of first through-hole 12 is the deposition thickness of tin cream on great pad promptly, through setting up printing hole 11 of co-altitude not, thereby can satisfy the required tin cream deposition thickness of different pads, thereby can effectively improve printed circuit board's quality.
The embodiments of the present invention are the preferred embodiments of the present invention, and the protection scope of the present invention is not limited by this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a ladder printing laser template, includes steel mesh (1), run through on steel mesh (1) and be provided with a plurality of and the position one-to-one's of supporting printed circuit board pad printing hole (11), its characterized in that: a reinforcing plate (2) is arranged above the steel mesh (1), the printing holes (11) comprise first through holes (12) and second through holes (13), the opening area of the first through holes (12) is larger than that of the second through holes (13), grooves communicated with the second through holes (13) are formed in the upper surface of the steel mesh (1), and the opening area of the grooves is larger than that of the second through holes (13); the reinforcing plate (2) is provided with a mounting groove (21) communicated with the first through hole (12) and the groove in a penetrating mode.
2. The stair-step printing laser template of claim 1, wherein: two adjacent grooves are communicated and are provided with connecting grooves (14).
3. The stair-step printing laser template of claim 1, wherein: the area of the reinforcing plate (2) is larger than that of the steel mesh (1), a connecting plate (22) is arranged between the reinforcing plate (2) and the steel mesh (1), and the connecting plate (22) is arranged in a step shape.
4. The stair-step printing laser template of claim 1, wherein: the upper surface of steel mesh (1) is provided with guide bar (23), be provided with the guide way that is used for supplying guide bar (23) to stretch into on reinforcing plate (2).
5. The stair-step printing laser template of claim 4, wherein: the section of the guide rod (23) is arranged in a triangular shape.
6. The stair-step printing laser template of claim 4, wherein: be provided with locating piece (25) on the upper surface of steel mesh (1), be provided with the constant head tank that is used for supplying locating piece (25) to stretch into on reinforcing plate (2), locating piece (25) and constant head tank elastic connection.
7. The stair-step printing laser template of claim 6, wherein: the positioning blocks (25) are arranged in a cross shape, and the positioning grooves are in a cross shape which is in adaptive insertion connection with the positioning blocks (25).
8. The stair-step printing laser template of claim 6, wherein: the number of the guide rods (23) is two, and the positioning blocks (25) are arranged between the two guide rods (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020262229.3U CN211531461U (en) | 2020-03-04 | 2020-03-04 | Ladder printing laser template |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020262229.3U CN211531461U (en) | 2020-03-04 | 2020-03-04 | Ladder printing laser template |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211531461U true CN211531461U (en) | 2020-09-18 |
Family
ID=72440826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020262229.3U Expired - Fee Related CN211531461U (en) | 2020-03-04 | 2020-03-04 | Ladder printing laser template |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211531461U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113145960A (en) * | 2021-05-06 | 2021-07-23 | 昆山联滔电子有限公司 | Electronic product welding method |
-
2020
- 2020-03-04 CN CN202020262229.3U patent/CN211531461U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113145960A (en) * | 2021-05-06 | 2021-07-23 | 昆山联滔电子有限公司 | Electronic product welding method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200918 |