CN108188237B - 100mm wide-row lead frame and production line thereof - Google Patents
100mm wide-row lead frame and production line thereof Download PDFInfo
- Publication number
- CN108188237B CN108188237B CN201810109681.3A CN201810109681A CN108188237B CN 108188237 B CN108188237 B CN 108188237B CN 201810109681 A CN201810109681 A CN 201810109681A CN 108188237 B CN108188237 B CN 108188237B
- Authority
- CN
- China
- Prior art keywords
- male die
- electroplating
- pipeline
- cleaning
- drying
- 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.)
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Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 36
- 238000009713 electroplating Methods 0.000 claims abstract description 36
- 238000001035 drying Methods 0.000 claims abstract description 28
- 239000007921 spray Substances 0.000 claims abstract description 19
- 238000007599 discharging Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 description 6
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/06—Stripping-off devices
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/08—Electroplating with moving electrolyte e.g. jet electroplating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
Abstract
The invention discloses a 100mm wide-row lead frame and a production line thereof, wherein the lead frame comprises a stamping device, an electroplating device and a forming device, and the stamping device comprises a die assembly; the electroplating device comprises a plurality of traction driving wheels, an electroplating guide wheel is arranged between two adjacent driving wheels, the electroplating guide wheel is a hollow annular wheel, a spray ring is arranged in a hollow inner cavity of the electroplating guide wheel, the inner diameter of the spray ring is slightly smaller than that of an annular nozzle of the electroplating guide wheel, the forming device comprises a cleaning assembly and a drying assembly, the cleaning assembly comprises a frame, a cleaning pipeline and a high-pressure spray head, one end of the cleaning pipeline is fixed on the frame, the other end of the cleaning pipeline is communicated with the high-pressure spray head, the drying assembly comprises a drying pipeline and a hot fan, one end of the drying pipeline is fixed on the frame, and one end of the hot fan is connected with the drying pipeline. The invention reduces the labor force and produces lead frames with high quality.
Description
Technical Field
The invention relates to the technical field of lead frame production, in particular to a 100mm wide-row lead frame and a production line thereof.
Background
At present, the lead frame stamping die all adopts the direct insertion type guide pin to position the round hole, if the die adopts the direct insertion type guide pin, because the single-side clearance between the direct insertion type guide pin and the round hole of the product reaches 0.005mm, the single-side clearance between the direct insertion type guide pin and the round hole of the product is 0.002mm, and in addition, the machining error and the assembly error are added, the tolerance on the product can reach +/-0.05 mm, the machining requirement can not be met, zero clearance can be achieved between the taper guide pin and the material, although the positioning is accurate, if the die adopts the taper guide pin, theoretically, each hole and the material are zero clearance, but the actual and theoretical differences are far from each other, because the machining error and the assembly error exist in the die machining itself, and the assembly error is not 100 percent of the cooperation, if the taper guide pins are all used, the interference exists between each other, and the round hole deformation of the product can be possibly caused.
Disclosure of Invention
The invention aims to provide a 100mm wide-row lead frame production line so as to solve the problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a 100mm wide row lead frame production line, includes stamping device, electroplating device and forming device, stamping device includes the mould subassembly, the mould subassembly includes upper die base, terrace die fixed plate, stripper, unloading mold insert and guide post, upper die base and stripper are upper and lower stack structure, still be equipped with a guide post on the upper die base, the upper die base still is equipped with stress adjustment subassembly, the bottom of upper die base is through screw fixedly connected with terrace die fixed plate and terrace die backing plate, the terrace die fixed plate is fixed in the bottom of terrace die backing plate, the bottom fixedly connected with of terrace die fixed plate the terrace die, the terrace die with the terrace die fixed plate is integrated structure, be equipped with the guide post between terrace die fixed plate and the stripper, it has the boss hole to open on the stripper, the tip of terrace die inserts in the terrace die hole, the bottom of stripper is equipped with unloading mold insert, it has the guide die cavity to open on the stripper, the tip of terrace die inserts in the guide die cavity; the electroplating device comprises a plurality of traction driving wheels, an electroplating guide wheel is arranged between two adjacent driving wheels, the electroplating guide wheel is a hollow annular wheel, a spray ring is arranged in a hollow inner cavity of the electroplating guide wheel, the inner diameter of the spray ring is slightly smaller than that of an annular nozzle of the electroplating guide wheel, the forming device comprises a cleaning assembly and a drying assembly, the cleaning assembly comprises a frame, a cleaning pipeline and a high-pressure spray head, one end of the cleaning pipeline is fixed on the frame, the other end of the cleaning pipeline is communicated with the high-pressure spray head, a winding shaft is further arranged on the frame, a lead frame is wound on the winding shaft, the drying assembly comprises a drying pipeline and a hot fan, one end of the drying pipeline is fixed on the frame, and one end of the hot fan is connected with the drying pipeline.
Preferably, the stress adjustment assembly comprises a drawing bar and a wedge, the drawing bar is in an L-shaped structure, the wedge is also in an L-shaped structure, one side of the drawing bar is clung to the bottom of the upper die holder, the wedge is clung to the other side of the drawing bar, and the middle parts of the drawing bar and the wedge penetrate through the guide post.
Preferably, a cylinder is further arranged on one side of the upper die holder, the cylinder is fixed on a support through a screw, the support is fixed at the bottom of the upper die holder, the movable end of the cylinder is connected with the drawing bar through a connecting piece, a groove is formed in the movable end of the cylinder along the direction of the movable end of the cylinder, one side of the drawing bar is inserted into the groove, and a fastening bolt penetrates through the drawing bar and the groove.
Preferably, a temperature sensor is arranged in the drying pipeline.
Preferably, one end of the cleaning pipeline is in a circular arc structure, a plurality of high-pressure spray heads are arranged on the inner cambered surface of the cleaning pipeline, and the cleaning pipeline surrounds the lead frame.
Preferably, 2 riding wheels are arranged at the bottom end of the electroplating guide wheel.
The invention also provides the lead frame, which is produced by the 100mm wide-row lead frame production line.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a stamping device, an electroplating device and a forming device, wherein a die in the stamping device adopts an elastic stripper plate mode. The elastic stripper can play a role of pressing during punching, which is necessary for the punching production of the lead frame. Because the section width of the lead is small, the reasonable pressing force can ensure that stronger tensile stress is kept during lead stamping, and the stamping deformation of the lead is prevented. The stripper insert is mounted on the stripper plate. The guide die cavity of the male die is arranged on the discharging insert, so that the position accuracy of the male die in the die is guaranteed, the requirement of high-precision machining is met, in addition, the electroplating device can enable a plurality of electroplating guide wheels to perform step-by-step electroplating operation according to the complexity of an electrified plating area of a lead frame ring, the forming device has the advantages of being simple in structure, flexible in assembly and adjustment and low in manufacturing cost, the forming device comprises a cleaning component and a drying component, electrolyte on the lead frame is cleaned by the cleaning component, and cleaning liquid on the lead frame is dried by the drying component. The invention reduces the labor force and produces lead frames with high quality.
Drawings
FIG. 1 is a schematic view of a stamping apparatus of the present invention;
FIG. 2 is a schematic diagram of a stress adjustment assembly according to the present invention;
FIG. 3 is a schematic view of the electroplating apparatus according to the present invention;
fig. 4 is a schematic structural view of the molding assembly of the present invention.
In the figure: 1. an upper die holder; 2. a cylinder; 3. a guide post; 4. a male die; 5. a male die fixing plate; 6. a stripper plate; 7. a discharge insert; 8. a male die backing plate; 9. a groove; 10. a stud; 11. drawing strips; 12. wedge; 13. a transfer wheel; 14. electroplating guide wheels; 15. a spray ring; 16. an annular nozzle; 17. a frame; 18. cleaning the pipeline; 19. a high pressure nozzle; 20. a drying pipeline; 21. a hot fan; 22. and (3) a riding wheel.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, an embodiment of the present invention is provided:
the production line of the 100mm wide-row lead frame comprises a stamping device, an electroplating device and a forming device, wherein the stamping device comprises a die assembly, the die assembly comprises an upper die holder 1, a male die 4, a male die fixing plate 5, a stripper 6, a discharging insert 7 and a guide post 3, the upper die holder 1 and the stripper 6 are in an upper and lower stacked structure, the upper die holder 1 is further provided with the guide post 3, the upper die holder 1 is further provided with a stress adjustment assembly, the bottom of the upper die holder 1 is fixedly connected with the male die fixing plate 5 and a male die backing plate 8 through screws, the male die fixing plate 5 is fixed at the bottom of the male die backing plate 8, the bottom of the male die fixing plate 5 is fixedly connected with the male die 4, the male die 4 and the male die fixing plate 5 are in an integrated structure, a guide post 3 is arranged between the male die fixing plate 5 and the stripper 6, the end part of the male die 4 is inserted into the male die hole, the bottom of the stripper 6 is provided with the discharging insert 7, and the end part of the male die 4 is inserted into a guide cavity; the electroplating device comprises a plurality of traction driving wheels 13, an electroplating guide wheel 14 is arranged between two adjacent driving wheels 13, the electroplating guide wheel 14 is a hollow annular wheel, a spray ring 15 is arranged in a hollow inner cavity of the electroplating guide wheel 14, an annular nozzle 16 with the inner diameter slightly smaller than that of the electroplating guide wheel 14 is arranged on the upper portion of the spray ring 15, the forming device comprises a cleaning assembly and a drying assembly, the cleaning assembly comprises a frame 17, a cleaning pipeline 18 and a high-pressure spray head 19, one end of the cleaning pipeline 18 is fixed on the frame 17, the other end of the cleaning pipeline 18 is communicated with the high-pressure spray head 19, a winding shaft is further arranged on the frame 17, a lead frame is wound on the winding shaft, the drying assembly comprises a drying pipeline 20 and a hot fan 21, one end of the drying pipeline 20 is fixed on the frame 17, and one end of the hot fan 21 is connected with the drying pipeline 20.
In this embodiment, the stress adjustment assembly includes a drawing bar 11 and a wedge 12, where the drawing bar 11 is in an L-shaped structure, the wedge 12 is also in an L-shaped structure, one side of the drawing bar 11 is tightly attached to the bottom of the upper die holder 1, the wedge 12 is tightly attached to the other side of the drawing bar 11, and the middle parts of the drawing bar 11 and the wedge 12 pass through the guide post 3.
In this embodiment, a cylinder 2 is further disposed on one side of the upper die holder 1, the cylinder 2 is fixed on a bracket through a screw, the bracket is fixed at the bottom of the upper die holder 2, a movable end of the cylinder 3 is connected with the drawing bar 11 through a connecting piece, a groove 9 is formed in the movable end of the cylinder 2 along the direction of the movable end, one side of the drawing bar 11 is inserted into the groove 9, and a fastening bolt penetrates through the drawing bar 11 and the groove 9.
In this embodiment, a temperature sensor is disposed in the drying duct 20.
In this embodiment, one end of the cleaning pipe 18 has a circular arc structure, an intrados of the cleaning pipe 18 is provided with a plurality of high-pressure nozzles 19, and the cleaning pipe 18 encloses the lead frame.
In this embodiment, 2 riding wheels 22 are disposed at the bottom end of the electroplating guiding wheel 14.
A lead frame, which is produced and prepared by the 100mm wide-row lead frame production line according to the scheme.
Working principle: the invention provides a stamping device, an electroplating device and a forming device, wherein a die in the stamping device adopts an elastic stripper plate mode. The elastic stripper can play a role of pressing during punching, which is necessary for the punching production of the lead frame. Because the section width of the lead is small, the reasonable pressing force can ensure that stronger tensile stress is kept during lead stamping, and the stamping deformation of the lead is prevented. The stripper insert 7 is mounted on the stripper plate 6. The guide cavity of the male die is arranged on the discharging insert 7, in order to ensure the position accuracy of the male die in the die, the requirement of high-precision machining is met, in addition, the electroplating device can start a plurality of electroplating guide wheels to perform step-by-step electroplating operation according to the complexity of the electrified plating area of the lead frame, and the forming device has the advantages of simple structure, flexible assembly and adjustment and low manufacturing cost, and comprises a cleaning component and a drying component, wherein the cleaning component cleans electrolyte on the lead frame, and the drying component dries cleaning liquid on the lead frame. The invention reduces the labor force and produces lead frames with high quality.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (1)
1. A100 mm wide row lead frame production line which is characterized in that: the stamping device comprises a die assembly, the die assembly comprises an upper die holder (1), a male die (4), a male die fixing plate (5), a discharging plate (6), a discharging insert (7) and a guide post (3), wherein the upper die holder (1) and the discharging plate (6) are in an upper and lower stacked structure, the upper die holder (1) is further provided with the guide post (3), the upper die holder (1) is further provided with a stress adjusting assembly, the bottom of the upper die holder (1) is fixedly connected with the male die fixing plate (5) and a male die base plate (8) through screws, the male die fixing plate (5) is fixedly connected with the bottom of the male die base plate (8), the male die (4) and the male die fixing plate (5) are in an integrated structure, a guide post (3) is arranged between the male die fixing plate (5) and the discharging plate (6), a male die hole (4) is formed in the discharging plate (6), and the bottom of the male die fixing plate (5) is fixedly connected with the male die (4) and the guide post (7) is inserted into the bottom of the male die insert (7); the electroplating device comprises a plurality of traction driving wheels (13), an electroplating guide wheel (14) is arranged between two adjacent driving wheels (13), the electroplating guide wheel (14) is a hollow annular wheel, a hollow inner cavity of the electroplating guide wheel (14) is provided with a spray ring (15), the upper part of the spray ring (15) is provided with an annular nozzle (16) with the inner diameter slightly smaller than that of the electroplating guide wheel (14), the forming device comprises a cleaning assembly and a drying assembly, the cleaning assembly comprises a rack (17), a cleaning pipeline (18) and a high-pressure spray head (19), one end of the cleaning pipeline (18) is fixed on the rack (17), the other end of the cleaning pipeline (18) is communicated with the high-pressure spray head (19), a winding shaft is further arranged on the rack (17), a lead frame is wound on the winding shaft, the drying assembly comprises a drying pipeline (20) and a hot air fan (21), one end of the drying pipeline (20) is fixed on the rack (17), and one end of the hot air fan (21) is connected with the drying pipeline (20);
the stress adjustment assembly comprises a drawing bar (11) and an inclined wedge (12), the drawing bar (11) is of an L-shaped structure, the inclined wedge (12) is of an L-shaped structure, one side of the drawing bar (11) is clung to the bottom of the upper die holder (1), the inclined wedge (12) is clung to the other side of the drawing bar (11), and the middle parts of the drawing bar (11) and the inclined wedge (12) penetrate through the guide column (3);
one side of the upper die holder (1) is also provided with an air cylinder (2), the air cylinder (2) is fixed on a bracket through a screw, the bracket is fixed at the bottom of the upper die holder (2), the movable end of the air cylinder (3) is connected with the drawing bar (11) through a connecting piece, the movable end of the air cylinder (2) is provided with a groove (9) along the direction of the movable end, one side of the drawing bar (11) is inserted into the groove (9), and a fastening bolt penetrates through the drawing bar (11) and the groove (9);
a temperature sensor is arranged in the drying pipeline (20);
one end of the cleaning pipeline (18) is in a circular arc structure, a plurality of high-pressure spray heads (19) are arranged on the inner cambered surface of the cleaning pipeline (18), and the cleaning pipeline (18) surrounds the lead frame;
and 2 riding wheels (22) are arranged at the bottom end of the electroplating guide wheel (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810109681.3A CN108188237B (en) | 2018-02-05 | 2018-02-05 | 100mm wide-row lead frame and production line thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810109681.3A CN108188237B (en) | 2018-02-05 | 2018-02-05 | 100mm wide-row lead frame and production line thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108188237A CN108188237A (en) | 2018-06-22 |
| CN108188237B true CN108188237B (en) | 2024-01-09 |
Family
ID=62592621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810109681.3A Active CN108188237B (en) | 2018-02-05 | 2018-02-05 | 100mm wide-row lead frame and production line thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108188237B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112845762B (en) * | 2020-12-30 | 2022-02-18 | 安徽众成合金科技有限公司 | Extrusion forming device for electronic components made of alloy materials |
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| JPS6462487A (en) * | 1987-09-02 | 1989-03-08 | Hitachi Cable | Method for continuously washing spot-plated lead frame |
| DE4011215A1 (en) * | 1989-04-13 | 1990-10-18 | Lavezzari S P A | Continuously coating and decorating metal foils - in which heat transfer decoration stage is added to cleaning and coating system for metal or paper foils |
| JPH07256219A (en) * | 1994-03-23 | 1995-10-09 | Sumitomo Metal Mining Co Ltd | Cleaning equipment of lead frame and cleaning |
| CN2690075Y (en) * | 2004-01-16 | 2005-04-06 | 郭冬梅 | Precision microregulating combined mold |
| CN201300170Y (en) * | 2008-11-13 | 2009-09-02 | 厦门市尚明达机电工业有限公司 | Semiconductor lead wire framework die |
| CN202246942U (en) * | 2011-08-29 | 2012-05-30 | 江阴康强电子有限公司 | Continuous plating device for lead frame |
| CN203826353U (en) * | 2014-04-28 | 2014-09-10 | 四川金湾电子有限责任公司 | Semiconductor lead frame production line |
| US9254588B1 (en) * | 2011-11-28 | 2016-02-09 | The United States Of America As Represented By The Secretary Of The Army | Protective layering process for circuit boards |
| CN208275997U (en) * | 2018-02-05 | 2018-12-25 | 江阴康强电子有限公司 | A kind of 100mm wide row lead frame production line |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499532B (en) * | 2015-12-29 | 2017-05-24 | 中信戴卡股份有限公司 | Wheel mold paint spraying device |
-
2018
- 2018-02-05 CN CN201810109681.3A patent/CN108188237B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6462487A (en) * | 1987-09-02 | 1989-03-08 | Hitachi Cable | Method for continuously washing spot-plated lead frame |
| DE4011215A1 (en) * | 1989-04-13 | 1990-10-18 | Lavezzari S P A | Continuously coating and decorating metal foils - in which heat transfer decoration stage is added to cleaning and coating system for metal or paper foils |
| JPH07256219A (en) * | 1994-03-23 | 1995-10-09 | Sumitomo Metal Mining Co Ltd | Cleaning equipment of lead frame and cleaning |
| CN2690075Y (en) * | 2004-01-16 | 2005-04-06 | 郭冬梅 | Precision microregulating combined mold |
| CN201300170Y (en) * | 2008-11-13 | 2009-09-02 | 厦门市尚明达机电工业有限公司 | Semiconductor lead wire framework die |
| CN202246942U (en) * | 2011-08-29 | 2012-05-30 | 江阴康强电子有限公司 | Continuous plating device for lead frame |
| US9254588B1 (en) * | 2011-11-28 | 2016-02-09 | The United States Of America As Represented By The Secretary Of The Army | Protective layering process for circuit boards |
| CN203826353U (en) * | 2014-04-28 | 2014-09-10 | 四川金湾电子有限责任公司 | Semiconductor lead frame production line |
| CN208275997U (en) * | 2018-02-05 | 2018-12-25 | 江阴康强电子有限公司 | A kind of 100mm wide row lead frame production line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108188237A (en) | 2018-06-22 |
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