CN102500636A - Bar shearing and forming mould of square flat packaging outer shell - Google Patents
Bar shearing and forming mould of square flat packaging outer shell Download PDFInfo
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- CN102500636A CN102500636A CN2011103198133A CN201110319813A CN102500636A CN 102500636 A CN102500636 A CN 102500636A CN 2011103198133 A CN2011103198133 A CN 2011103198133A CN 201110319813 A CN201110319813 A CN 201110319813A CN 102500636 A CN102500636 A CN 102500636A
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- stamping knife
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Abstract
The invention relates to a bar shearing and forming mould of a square flat packaging outer shell, which comprises an upper mould connecting column, an upper mould pressure block, an upper mould body, bar shearing stamping knives, a lower mould body and a lower mould pressure block. The upper mould connecting column and the upper mould pressure block are fixedly connected with the upper mould body, the lower mould body is fixedly connected with the lower mould pressure block, the bar shearing stamping knives are inlaid in the upper mould body and are distributed in parallel in a vertical direction, and the tails end of the bear shearing stamping knives are protruded outside the upper mould body. The mould changes a traditional punch forming mode into extrusion molding, integrates bar shearing with molding, and designs a corresponding mould shape. The upper mould body falls from top to down, first the bar shearing stamping knives cut off leads, then the lower surface of the upper mould body and the upper surface of the lower mould body are extruded in parallel, and the molding of the leads is realized. The bar shearing and forming mould of the square flat packaging outer shell not only realizes the bilateral once-through processing of bar shearing and molding, but also improves the quality of the leads, prevents the over-friction of the mould to the leads, so that quite smooth lead transition sections are obtained, and simultaneously the adverse impact brought by burrs is eliminated.
Description
Technical field
The present invention relates to a kind of Trim Molding mould, be applicable to the bilateral disposable Trim Molding of quad-flat-pack shell.
Background technology
The English name of quad-flat-pack is QFP, is the abbreviation of Quard Flat Package, and the characteristics of this encapsulation are that package main body is a square, and lead-in wire is drawn from four sides of package main body, and the base material of package main body has three kinds in pottery, metal and plastics.The chip carrier that obtains via this encapsulation is called as QFP type shell, and the QFP type shell that has also has tetragonal insulation gusset, and lead terminal is brazed on the insulation gusset.Mainly comprise ceramic wafer and metal frame in the insulation gusset, ceramic wafer plays insulating effect, and metal frame plays the effect of the ceramic wafer on fixing four limits, and the metal frame on other four angles all has the locating hole in the test technology, can play the effect of test position fix.The common feature of QFP type shell pin is a close between the lead-in wire, and pin is very thin, and this also makes QFP type shell extensively applied in extensive and the super large-scale integration.
Conventional Trim Molding equipment generally is divided into cuts muscle mould and mould two parts, cuts muscle and moulding and needs independent the completion.The top-down muscle mode of cutting of general employing when cutting muscle is prone to cause the pin tangent plane to produce downward burr, and downward burr contacts with circuit board, can influence welding effect.During moulding, adopt monolateral stamping forming mode, pressure head is arranged directly over the lead-in wire; Pressure head and the together vertical drop of patrix molding cutter, the pressure head top that will go between is pushed down, and prevents that lead-in wire from coming off; Molding cutter continues to descend, and presses the lead-in wire punch forming of the shape of mold forming cutter with level.During this kind mould molding, can form bigger frictional force to the lead-in wire changeover portion, especially for QFP type shell, it is very thin go between, more is prone to cause problems such as coplanarity difference and pin be crooked, the reliability that influence goes between.Lead-in wire after the moulding too bends, and lead-in wire intensity is around the corner reduced, and lead-in wire is prone to fracture around the corner.In addition, this kind mould once can only be accomplished monolateral moulding, and not only operating efficiency is not high, and can cause the problem of lead-in wire uniformity difference, influences product quality.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiency of prior art, a kind of Trim Molding mould of quad-flat-pack shell is provided, the quality of lead-in wire is improved, avoid the excessive friction of mould to lead-in wire, the lead-in wire changeover portion that is comparatively relaxed.Not only realize cutting the bilateral disposable processing of muscle, moulding, can also eliminate the burr adverse effect simultaneously.
Technical solution of the present invention is: the Trim Molding mould of quad-flat-pack shell comprises patrix joint pin, patrix briquetting, patrix main body, cuts muscle stamping knife, counterdie main body and counterdie briquetting; The bottom of patrix joint pin is fixedly connected with the patrix briquetting, and the other end of patrix briquetting is fixedly connected with the patrix main body; The counterdie main body is fixedly connected with the counterdie briquetting; Cut the muscle stamping knife and be embedded in the patrix main body, and, cut muscle stamping knife end and protrude in the patrix main body in the parallel distribution of vertical; Position cutting between the muscle stamping knife has upper groove, is used to prevent patrix main body crushing quad-flat-pack shell heat sink when descending; The outside of said upper groove and boss face is arranged in the position of cutting between the muscle stamping knife is used to push down the lead-in wire exit; Counterdie main body upper surface has low groove, is used to place the quad-flat-pack shell; There is the stamping knife groove of symmetrical distribution the low groove both sides, said stamping knife groove with cut the muscle stamping knife and cooperate; The patrix main body is landed from top to bottom, cuts off lead-in wire by cutting the muscle stamping knife earlier, again by the lower surface of patrix main body and the upper surface extruding parallel to each other of counterdie main body, realizes the moulding of lead-in wire.
The upper surface of said counterdie main body has the mold position post, and the lower surface of said patrix main body has the mold position hole that cooperates with it, and the tall and big degree of depth and the difference of the two in the mold position hole of mold position post is the length of diameter wire.
Two columniform shell reference columns are arranged on the said low groove, and the distance between the shell reference column is the length of side of the package main body of quad-flat-pack shell, and the side square shaped flat package shell shell through the shell reference column carries out spacing.
Said stamping knife groove is a groove up and down, and there is cavity said counterdie briquetting inside, and empty cavity position is corresponding with the stamping knife groove with size, the lead-in wire waste material of cutting behind the muscle is spilt from the stamping knife groove after, fall into the cavity of counterdie briquetting, so that the collection of the waste material that goes between.
Said boss face and cut between the plane at muscle stamping knife place the first transition inclined-plane is arranged has the second transition inclined-plane that cooperates with the first transition inclined-plane on the said counterdie main body, the changeover portion of the first transition inclined-plane and the parallel swaged lead in the second transition inclined-plane.
Said patrix main body, cutting muscle stamping knife and counterdie main body, to adopt W18Cr4V be material, and process through Quenching Treatment.
The present invention compared with prior art beneficial effect is:
(1) the present invention changes traditional monolateral punch forming mode into bilateral extrusion modling; Designed corresponding upper and lower mould body shape; Effectively avoided the excessive friction of mould to lead-in wire; And control the distance between the upper and lower mould main body through the mold position post of counterdie, effectively avoided the excessive compression of mould to lead-in wire;
(2) the present invention cuts the muscle stamping knife through in the mould of squash type, adding, and makes to cut muscle and can not only improve operating efficiency greatly on same station, once accomplishing with moulding, and has improved the uniformity that goes between;
(3) the present invention adopts the thinking of oppositely cutting muscle, make that the lead-in wire tangent plane produces burr upwards, avoided the downward butt welding of the burr living harmful effect of practicing midwifery;
(4) the present invention's mode of adopting locating slot and reference column to combine positions chip carrier, and the QFP type shell that has overcome ceramic-like and plastics class is adding the problem that be prone to produce slight deformation man-hour;
(5) the present invention has effectively reclaimed the lead-in wire waste material through the cavity that design in the counterdie briquetting matches with the stamping knife groove, is convenient to second use;
(6) the present invention has designed rational transition inclined-plane, makes lead-in wire that the changeover portion that comparatively relaxes arranged, and has effectively improved lead-in wire intensity.
Description of drawings
Fig. 1 is master's pseudosection of the present invention;
Fig. 2 is the present invention left side pseudosection;
Fig. 3 is a patrix stereogram of the present invention;
Fig. 4 is a patrix main body boss face partial enlarged drawing;
Fig. 5 is the first transition inclined-plane and the second transition inclined-plane partial enlarged drawing;
Fig. 6 is a counterdie stereogram of the present invention;
Fig. 7 is the counterdie main body second transition inclined-plane partial enlarged drawing;
Fig. 8 cuts muscle, molding effect figure for the present invention;
Fig. 9 cuts muscle, molding effect figure for conventional method.
The specific embodiment
The present invention changes traditional monolateral punch forming pattern into bilateral extrusion modling, and will cut muscle, moulding unites two into one, and has designed corresponding mold shape.The Trim Molding mould of QFP type shell mainly comprises patrix joint pin 1, patrix briquetting 2, patrix main body 3, cuts muscle stamping knife 4, counterdie main body 5 and counterdie briquetting 6.Patrix main body 3 is landed from top to bottom, cuts off lead-in wire by cutting muscle stamping knife 4 earlier, again by the lower surface of patrix main body 3 and the upper surface extruding parallel to each other of counterdie main body 5, realizes the moulding of lead-in wire.
Like Fig. 1, shown in 2, patrix joint pin 1 is threaded cylinder, and its upper end is connected with outside press, and the screwed hole corresponding with patrix joint pin 1 arranged on the press, and the bottom of patrix joint pin 1 and patrix briquetting 27 are fixedly connected through pinning.Between patrix briquetting 2 and the patrix main body 3 pad 8 is arranged, patrix briquetting 2, pad 8 and patrix main body 3 are fixedly connected through patrix pin 9.
As shown in Figure 3, cut muscle stamping knife 4 and closely be embedded in the patrix main body 3, cut muscle stamping knife 4 and patrix main body 3 interference fit.Cutting muscle stamping knife 4 has two, and in the parallel distribution of vertical, so that bilateral disposable muscle, the moulding type cut.Cut muscle stamping knife 4 ends and protrude in patrix main body 3 surfaces, its objective is to make patrix main body 3 when descending, cut muscle stamping knife 4 and contact with lead-in wire at first, lead-in wire was cut off before 3 declines of assurance patrix main body finished.Pad 8 between patrix briquetting 2 and the patrix main body 3 can reduce the impact of cutting the lower patrix briquetting 2 of 4 pairs of hardness of muscle stamping knife greatly.The counterdie main body 5 of the surface of described patrix main body 3 faced downwards when work, so be called the lower surface of patrix main body 3, in like manner, the working face of counterdie main body 5 is known as the upper surface of counterdie main body 5.Position cutting between the muscle stamping knife 4 has upper groove 10, is used to prevent patrix main body 3 crushing QFP type shell heat sink when descending, thus upper groove 10 be wider than the heat sink length of side.If it is heat sink that QFP type shell is not with, can there be upper groove 10.
Like Fig. 4, shown in 5, upper groove 10 outsides and boss face 11 is arranged in the position of cutting between the muscle stamping knife 4 are used to push down the lead-in wire exit.Boss face 11 and cut between the plane, muscle stamping knife 4 place the first transition inclined-plane 12 is arranged, it with counterdie main body 5 on the second transition inclined-plane 13 parallel extruding the time, the changeover portion that lead-in wire is comparatively relaxed.
As shown in Figure 6, for the QFP type shell of tape insulation gusset, insulation muscle tank 19 is arranged in the position of cutting muscle stamping knife 4 outsides, be used to place the insulation gusset of QFP type shell.
As shown in Figure 6, the upper surface of counterdie main body 5 has low groove 14, is used to place QFP type shell.Need reverse the placement when placing QFP type shell, because will produce downward burr inevitably when cutting muscle stamping knife 4 cutting downwards, cut muscle again after reverse the placement, the burr of lead-in wire tangent plane is upwards during lead-in wire to be welded, can avoid the influence of burr to circuit board.The width of low groove 14 is the length of side of package main body; Two columniform shell reference columns 15 are arranged on the low groove 14; Distance between the shell reference column 15 is the length of side of the package main body of QFP type shell, carries out spacing through the side of shell reference column 15 to QFP type shell.The localization method that this reference column combines with locating slot, under the prerequisite that guarantees positioning accuracy, the QFP type shell that can effectively overcome ceramic-like and plastics class is prone to the slight deformation of generation in processing technology.There is the stamping knife groove 16 of symmetrical distribution in low groove 14 outsides, and said stamping knife groove 16 is a groove, and cut muscle stamping knife 4 and cooperate, and the two is positioned at same vertical guide.Of Fig. 2, there is cavity 17 counterdie briquetting 6 inside, and the position of cavity 17 is corresponding with stamping knife groove 16 with size, the lead-in wire waste material of cutting behind the muscle is spilt from stamping knife groove 16 after, fall into the cavity 17 of counterdie briquetting 6, so that the collection of the waste material that goes between.Counterdie main body 5, counterdie briquetting 6 are fixedly connected through counterdie pin 18.
As shown in Figure 7, the second transition inclined-plane 13 is arranged on the counterdie main body 5, cooperate with the first transition inclined-plane 12 of patrix main body 3, co-extruded forms the changeover portion of lead-in wire.Stamping knife groove 16 outsides and on the platform that is higher than insulation muscle tank 19, mold position post 20 is arranged; As shown in Figure 3; The lower surface of patrix main body 3 has the mold position hole 21 that cooperates with it; The tall and big degree of depth and the difference in mold position hole 21 of mold position post 20 is the length of diameter wire, and this difference has guaranteed that lead-in wire can be by excessive compression.Traditional impact forming method can only avoid lead-in wire by excessive compression through the falling head of press, not only strengthened the design difficulty of press, and reliability is not high yet.
Patrix main body 3 among the present invention, pad 8, cutting muscle stamping knife 4 and counterdie main body 5, to adopt W18Cr4V be material, and process through Quenching Treatment.This material hardness is high, can guarantee can not be out of shape in die cuts muscle, the forming process, guarantees the precision and the consistency of product of lead-in wire moulding.Patrix joint pin 1, patrix briquetting 2, counterdie briquetting 6 adopt the aluminium of lighter weight, can effectively alleviate mold weight.Add the aluminium low price, can reduce cost greatly.
As shown in Figure 8, with the lead-in wire that obtains behind this mould Trim Molding, need during later welded shell is spun upside down.With compare with the lead-in wire of conventional method moulding among Fig. 9, can know among Fig. 8 lead-in wire burr direction upwards, and the lead-in wire changeover portion comparatively relaxes, and do not have too much friction in the forming process, therefore lead-in wire has preferable quality.
The unexposed technology of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (6)
1. the Trim Molding mould of quad-flat-pack shell is characterized in that: comprise patrix joint pin (1), patrix briquetting (2), patrix main body (3), cut muscle stamping knife (4), counterdie main body (5) and counterdie briquetting (6); The bottom of patrix joint pin (1) is fixedly connected with patrix briquetting (2), and the other end of patrix briquetting (2) is fixedly connected with patrix main body (3); Counterdie main body (5) is fixedly connected with counterdie briquetting (6); Cut muscle stamping knife (4) and be embedded in the patrix main body (3), and, cut muscle stamping knife (4) end and protrude in patrix main body (3) in the parallel distribution of vertical; Position cutting between the muscle stamping knife (4) has upper groove (10), is used to prevent patrix main body (3) crushing quad-flat-pack shell heat sink when descending; The outside of said upper groove (10) and be positioned at the position of cutting between the muscle stamping knife (4) boss face (11) is arranged is used to push down the lead-in wire exit; Counterdie main body (5) upper surface has low groove (14), is used to place the quad-flat-pack shell; There is the stamping knife groove (16) of symmetrical distribution low groove (14) both sides, said stamping knife groove (16) with cut muscle stamping knife (4) and cooperate; Patrix main body (3) is landed from top to bottom, cuts off lead-in wire by cutting muscle stamping knife (4) earlier, again by the lower surface of patrix main body (3) and the upper surface extruding parallel to each other of counterdie main body (5), realizes the moulding of lead-in wire.
2. the Trim Molding mould of quad-flat-pack shell according to claim 1; It is characterized in that: the upper surface of said counterdie main body (5) has mold position post (20); The lower surface of said patrix main body (3) has the mold position hole (21) that cooperates with it, and the tall and big degree of depth and the difference of the two in mold position hole (21) of mold position post (20) is the length of diameter wire.
3. the Trim Molding mould of quad-flat-pack shell according to claim 1; It is characterized in that: two columniform shell reference columns (15) are arranged on the said low groove (14); Distance between the shell reference column (15) is the length of side of the package main body of quad-flat-pack shell, and the side square shaped flat package shell shell through shell reference column (15) carries out spacing.
4. the Trim Molding mould of quad-flat-pack shell according to claim 1; It is characterized in that: said stamping knife groove (16) is groove up and down; There is cavity (17) said counterdie briquetting (6) inside, and cavity (17) position is corresponding with stamping knife groove (16) with size, the lead-in wire waste material of cutting behind the muscle is spilt from stamping knife groove (16) after; Fall into the cavity (17) of counterdie briquetting (6), so that the collection of lead-in wire waste material.
5. the Trim Molding mould of quad-flat-pack shell shell according to claim 1; It is characterized in that: said boss face (11) and cut between the plane at muscle stamping knife (4) place the first transition inclined-plane (12) is arranged; The second transition inclined-plane (13) that cooperates with the first transition inclined-plane (12) is arranged, the changeover portion of the first transition inclined-plane (12) and the parallel swaged lead in the second transition inclined-plane (13) on the said counterdie main body (5).
6. the Trim Molding mould of quad-flat-pack shell according to claim 1 is characterized in that: said patrix main body (3), cutting muscle stamping knife (4) and counterdie main body (5), to adopt W18Cr4V be material, and process through Quenching Treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110319813.3A CN102500636B (en) | 2011-10-20 | 2011-10-20 | Bar shearing and forming mould of square flat packaging outer shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110319813.3A CN102500636B (en) | 2011-10-20 | 2011-10-20 | Bar shearing and forming mould of square flat packaging outer shell |
Publications (2)
| Publication Number | Publication Date |
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| CN102500636A true CN102500636A (en) | 2012-06-20 |
| CN102500636B CN102500636B (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110319813.3A Expired - Fee Related CN102500636B (en) | 2011-10-20 | 2011-10-20 | Bar shearing and forming mould of square flat packaging outer shell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102338A (en) * | 2016-06-29 | 2016-11-09 | 叶金洪 | A kind of coaxial electrical component surface mount method |
| CN109175187A (en) * | 2018-10-18 | 2019-01-11 | 无锡市星达石化配件有限公司 | A kind of factory's flange disc forging mold |
| CN110369608A (en) * | 2019-06-28 | 2019-10-25 | 无锡红光微电子股份有限公司 | The Trim Molding device of semiconductor devices |
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| US20010001936A1 (en) * | 1997-12-30 | 2001-05-31 | Sang Ki Kim | Trimming apparatus having punches with air flow routes for removal of gate scraps |
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| CN201112361Y (en) * | 2007-03-29 | 2008-09-10 | 北京控制工程研究所 | Four-sided flat package large scale integrated circuit lead wire precision forming device |
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| CN201910409U (en) * | 2010-09-21 | 2011-07-27 | 深圳市矽格半导体科技有限公司 | Multi-row trimming and forming die for integrated circuit |
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2011
- 2011-10-20 CN CN201110319813.3A patent/CN102500636B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010001936A1 (en) * | 1997-12-30 | 2001-05-31 | Sang Ki Kim | Trimming apparatus having punches with air flow routes for removal of gate scraps |
| KR20010112773A (en) * | 2000-06-15 | 2001-12-22 | 곽정소 | formming air cavity for semiconductor package |
| KR20020068177A (en) * | 2001-02-20 | 2002-08-27 | 설기열 | Apparatus for trimming and forming of semiconducting manufacturing process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102338A (en) * | 2016-06-29 | 2016-11-09 | 叶金洪 | A kind of coaxial electrical component surface mount method |
| CN106102338B (en) * | 2016-06-29 | 2018-11-20 | 东莞市有辰电子有限公司 | A kind of coaxial soft copy surface mount method |
| CN109175187A (en) * | 2018-10-18 | 2019-01-11 | 无锡市星达石化配件有限公司 | A kind of factory's flange disc forging mold |
| CN110369608A (en) * | 2019-06-28 | 2019-10-25 | 无锡红光微电子股份有限公司 | The Trim Molding device of semiconductor devices |
| CN110369608B (en) * | 2019-06-28 | 2024-05-28 | 无锡红光微电子股份有限公司 | Cutting rib forming device of semiconductor device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102500636B (en) | 2014-02-26 |
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Granted publication date: 20140226 Termination date: 20211020 |