CN1181290A - Process for manufacturing contacts for electronics devices, manufacturing apparatus for carrying out same process and continuous strip material for stamping used for the same process - Google Patents
Process for manufacturing contacts for electronics devices, manufacturing apparatus for carrying out same process and continuous strip material for stamping used for the same process Download PDFInfo
- Publication number
- CN1181290A CN1181290A CN97114887A CN97114887A CN1181290A CN 1181290 A CN1181290 A CN 1181290A CN 97114887 A CN97114887 A CN 97114887A CN 97114887 A CN97114887 A CN 97114887A CN 1181290 A CN1181290 A CN 1181290A
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- China
- Prior art keywords
- lead portion
- connector
- electronic device
- make
- connectors
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
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- 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
- B21D28/00—Shaping by press-cutting; Perforating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/32—Holders for supporting the complete device in operation, i.e. detachable fixtures
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- Engineering & Computer Science (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Punching Or Piercing (AREA)
- Press Drives And Press Lines (AREA)
- Connecting Device With Holders (AREA)
Abstract
A process for successive manufacturing several kinds of contacts having contact portions of an identical profile and lead portions which are disposed in two or more different positions from a metal strip. The process comprises the steps of (a) stamping a blank metal strip into a preliminary blank metal strip in which each contact portion is integrally formed with the lead portions which are disposed in two or more different positions, so that said each contact portion is connected with a continuous carrier portion via the plurality of lead portions; (b) cutting connections between adjacent ends of the lead portions, which are connected with said contact portions, and the carrier portion and connections between adjacent ends of the lead portions other than contact portions having lead portion profile A and said contact portions, thereby manufacturing first contacts for electronic devices having the lead portion A; and (c) is similar with b), manufacturing second contacts for electronic devices having the lead portion profile B.
Description
The present invention relates to integrated circuit (IC) is installed to the manufacture method of the connector that is used for electronic device on the printed circuit board (PCB), be used to carry out the continuous connector material band of the equipment of this method and the punching press that this method is used.The manufacture method that particularly relates to the connector of integrated circuit (IC) socket, described each connector has the identical a plurality of contacting parts of profile and in a plurality of lead portion of two or more diverse locations, be used to carry out the continuous connector material band of the equipment of this method and the punching press that this method is used.
Terminology used here " IC " is meant a kind of compound circuit parts, wherein, is integrated into microminiaturized device such as electronic components such as transistor, diode, resistor, capacitors.Each IC is installed on the printed circuit board (PCB) through socket.
The exemplary of the socket that DIP (dip) formula IC uses respectively has a plurality of pins on the dual-side of IC main body, as shown in Figure 4.
Each connector 25 comprise the lead portion 25b that the installing hole 30a that is used for inserting printed circuit board (PCB) 30 welds then and to touch with the pin 10a of IC10 touch part 25a.
The profile that touches part 25a that is used for the plug connector 25 of socket 20 is consistent about being, but different with the position at the lead portion 25b of right edge in the position of the lead portion 25b on limit, left side.Therefore, need with two kinds of connectors 25, a kind of left side that is used for, another kind is used for the right side.
Because some IC all has pin on its four sides, therefore, different types of connector of four kinds of different lead portion profiles must be arranged.The conventional method that manufacturing has identical contacting part branch profile and a connector 25 that 2 kinds of different lead portion profiles are arranged as shown in Figure 3.In this method, make the connector of the equal number that A and Type B lead portion profile are arranged.
The metal of sequential punching elongation brings makes connector 25.This elongation metal tape is provided, which is provided with each other, be used for processing continuously and operation automatically, afterwards, make through punch process and to touch part 25a and lead-in wire 25b by the delivery part 28 of the tactic datum hole 28a that equidistantly separates.The metal tape of punching press carries out the plating processing on demand and makes each connector 25 from delivery part 28 separately.
Along with the processing of the delivery part 28 of metal tape and begin to make connector 25, process connector 25 subsequently.Shown in Fig. 3 (b1) and 3 (b2), finish the processing that touches part 25a and lead portion 25b of connector respectively.Usually, A pattern tool is placed on the stamping machine, makes the A type connector of requirement continuously, referring to Fig. 3 (b1) and Fig. 3 (c1).Subsequently, replace A pattern tool, make the Type B connector of requirement continuously, referring to Fig. 3 (b2) and Fig. 3 (c2) with the Type B mould.
In the packaging technology of socket, need the A type and the Type B connector of equal number.As mentioned above, in the classical production process, make a kind of connector of requirement earlier, afterwards, change the mould of stamping machine, make another kind of connector again.Unless finished whole manufacturing process, otherwise can not provide assembly process required whole connectors.Therefore this is difficult to the continuous operation that is worked into the socket assembling of carrying out automatically from connector.
A and two kinds of connectors of B 25 of being connected on the delivery part 28 are supplied with assembly process and are rolled into volume.Each connector only is connected to delivery part 28 through a lead portion, referring to Fig. 3 (b1) and 3 (b2).Therefore, cause that in subsequently processing step or the transport process between the processing step part usually can be out of shape.This just can not automated production.
Because make A type and Type B connector in batches respectively, the metal tape of A type and Type B connector in batches usually can be different.Metal tape each in batches between slightly different on component will cause adverse effect to the electrical property of the left and right sides connector in the socket of making.
One object of the present invention is to provide a kind of manufacture method that is used for the connector of electronic device, wherein can improve the production efficiency of connector, can also make a left side and right connector supply with the socket assembly line continuously; And the equipment that these connectors are provided.
Another object of the present invention is, a kind of material band of continuous connector of punching press is provided, and the drawing knot part that wherein can prevent to touch between part and the delivery part is out of shape and is prevented to assemble back terminal misalignment.
For achieving the above object, the invention provides a kind of method of continuous several connectors of manufacturing, the lead portion that touches partly and be located at two or more diverse locations on the metal tape of the profile unanimity that described connector has, this method may further comprise the steps: a), the blank metal tape is struck out elementary blank metal tape, wherein, each contact portion forms as one with the lead portion that is located in two or more diverse locations, makes each described contact portion be connected with delivery part continuously through described a plurality of lead portion; B), cut off with have a given priority describedly touch the abutting end of the lead portion on the primary importance that part is connected and the connection between the delivery part, and the connection between the abutting end of other locational lead portion of cut-out except that primary importance and the described contacting part branch, therefore, make first connector that is used for electronic device, it has the lead portion on primary importance; And c), cut off and the described connection between touching the abutting end of the lead portion on the second place that part is connected and delivering partly with given priority, and the connection between the abutting end of other locational lead portion of cut-out except that the second place and the described contacting part branch, thus, make the connector that is used for electronic device, it has the lead portion that is positioned on the second place.
Can carry out step b) and c simultaneously) so that make two kinds of connectors that are used for electronic device simultaneously.
Described first and second connectors that are used for electronic device can assign to repeat make with contiguous two described contacting parts.
This method also comprises the processing step that two kinds of connectors that are used for electronic device is sorted and carry by groove separately they.
The present invention also provides a kind of equipment that is used for making continuously several connectors, described connector has the lead portion that touches partly and be located at two or more diverse locations on the metal tape of profile unanimity, it comprises: the device that a) the blank metal tape is struck out elementary blank metal tape, wherein, each touches part and forms as one with the lead portion that is located at two above diverse locations, makes the described a plurality of lead portion of described each contacting part lease making be connected with delivery part continuously; B) first shearing device, be used to cut off with have a given priority describedly touch the abutting end of the lead portion on the primary importance that part is connected and the connection between the delivery part, and cut off the abutting end of other the locational lead portion except that primary importance and the connection between the described contacting part branch, make first connector that on primary importance, has lead portion of used for electronic device thus; And c) second shearing device, be used to cut off with have a given priority describedly touch the abutting end of the lead portion on the second place that part is connected and the connection between the delivery part, and cut off the abutting end of other the locational lead portion except that the second place and the connection between the described contacting part branch, make second connector that on the second place, has lead portion that is used for electronic device thus.
Described first and second shearing devices can adjacent one another arely be provided with.Therefore, they are operated with the method for synchronization, describedly to touch first and second connectors that the part manufacturing is used for electronic device with adjacent two simultaneously.
Being used for skewed slot to two kinds of connectors letter sorting of used for electronic device can be located at below described first and second shearing devices tight.
The present invention also provides a kind of connector material band of continuous punching press, be used to make and have touching part and being provided with several connectors that are used for electronic device of lead portion at two or more diverse locations of profile unanimity, it comprises: vertical continuous delivery part; Profile unanimity and a plurality of parts that touch that are provided with along described delivery part; And lead portion, it forms as one on two or more diverse locations with the delivery part with respectively touching part, and the described a plurality of lead portion of each described contacting part lease making are by the supporting of described continuous delivery part.
Below will describe the present invention in detail with preferred embodiment referring to accompanying drawing.
How the (a) and (b) of Fig. 1, (c), (d1) and (d2) be explanation according to a preferred embodiment of the manufacture method of the connector that is used for electronic device of the present invention make the schematic diagram of the connector with two lead portion on two diverse locations;
Fig. 2 is explanation another preferred embodiment according to the manufacture method of the connector that is used for electronic device of the present invention, how to make the schematic diagram of the connector with four lead portion on four diverse locations;
(a) of Fig. 3, (b1), (b2), (c1) and how be explanation (c2) to make the schematic diagram that has at the connector of two lead portion of two diverse locations according to the classical production process that is used for the connector of electronic device;
Fig. 4 illustrates the perspective view that how to use the connector that is used for electronic device.
The production line that is used for the connector of IC socket generally includes feeder apparatus and manufacturing equipment, and described feeder apparatus is used for supplying with metal tape, the connector that the metal tape manufacturing that described manufacturing equipment is used to be supplied with has given profile to the connector manufacturing equipment.
Handle for carrying out continuous plating (plating), each connector is sequentially connected to banded delivery part.Convenient for transporting and handling, the connector of linking the delivery part is rolled into volume.In this case, need the equipment that batches the delivery part that is loaded with the connector of in the connector manufacturing equipment, having made.Because feeding device and taking-up equipment all belong to prior art, therefore omit detailed description to them.
The equipment of described manufacturing connector 25 comprises stamping machine and mould, and this stamping machine has pay-off, is used at each punching stroke by presenting metal tape to constant pitch, and described each mould is arranged on each pitch continuously by the pitch feed direction of stamping machine.
Stamping machine should have essential pressure of punching press connector 25 and the essential punching stroke number of times at time per unit.Certainly, the number of times of punching stroke is The more the better, can make a large amount of connector 25 like this.
Require its useful life longer for mould.Use such as titanium-copper alloy, the acid bronze alloy of beryllium-copper alloy and so on is made these connectors.Obviously, as if because the connector material softer, the load that is added on the mould in the punching operation is less.But, in a large amount of production, stamp out these connectors by the speed of per minute hundreds of time punching stroke.Because therefore the drawing velocity height will consider to be added to the load on the mould.Therefore, the most handy hardness is made mold materials greater than the superhard material of SKD11.
The metal tape of supplying with at first forms delivery part 28.Delivery part 28 is provided with the continuous datum hole 28a that separates each other along its length, is used for to present connector 25 to constant pitch.Afterwards,, send into metal continuously and take stamping machine to and present on the mould that pitch provides continuously, make these connectors 25 thus continuously at each by using delivery part 28.
First feature by the manufacture method of the connector that is used for electronic device of the present invention is, at first make and be with 29 after the continuous punching press, wherein, along the delivery partial continuous a plurality of connectors are set, each connector has by the lead portion profile A that will all make and B is stacked and formed lead portion profile integral with each other (A+B).
Specifically, have in the step that touches part 25a and two kinds of connectors 25 of the lead portion 25b (A or B) that is located at two diverse locations of profile unanimity in manufacturing, produce continuous connector band 29, see Fig. 1 (b) with a plurality of lead portion profiles (A+B) punching press.In other words, lead portion profile (A+B) forms as one with delivery part 28 with touching part 25a, and two lead portion 25b corresponding to two positions are arranged.Each touches part 25a and is bearing on the continuous delivery part 28 and constitutes an integral body with it through described a plurality of lead portion 25b.
Therefore, the continuous connector band 29 of punching press is provided with the connector 25 with two lead portion 25b, makes these connectors 25 separate in succession along the length direction of delivery part 28.Two lead portion 25b are fixed firmly on the delivery part.
Therefore, can prevent to be out of shape in the course of conveying of lead portion 25b between subsequent process steps and each processing step.Connector roll coil of strip rolling is made its easier processing.
Second feature according to the manufacture method of the connector that is used for electronic device of the present invention is, this method comprises from the continuous connector band 29 of the punching press that wherein is provided with lead portion profile (A+B) continuously separates any step two kinds of connectors with lead portion profile A and B.In other words, in order to make the connector 25 that has lead portion profile A, to cut off abutting end and the connection between the delivery part 28 that is used to connect the given lead-in wire 25b that touches part 25a and cutting off the abutting end of the lead portion 25b except that lead portion profile A and touch connection between the part 25a.
And, be used to connect abutting end and the connection between the delivery part 28 of the given lead portion 25b that touches part 25a and cut off the abutting end of other lead portion except that those have the lead portion of lead portion profile B and touch connection 27 between the part 25a in order to make the connector 25 of band lead portion profile B, to cut off.
In this step, connector 25 is separated into the connector of leaded part profile A and the connector of leaded part profile B.At this moment, utilize a group or more paired mould (mould of a connector that is used for making leaded profile A and another are used for making the mould of the connector of leaded profile B) to make two kinds of connectors 25 simultaneously with lead-in wire profile A and two kinds of shapes of B.For two kinds of connectors 25 that prevent profile A and B mix, preferably be provided for receiving immediately two skewed slots of these two kinds of connectors 25 in separation circuit step downstream.
Opened in 25 minutes by leaded part profile A and B every pair being patched, can make two kinds of connectors 25 of identical leaded part profile A of quantity and B simultaneously at this separating step.Therefore, by this separation circuit step being attached to the assembling procedure step of socket 20, can supply with connector 25 continuously.
According to the manufacture method that is used for the connector of electronic device of the present invention, owing to can cut out two kinds of connectors from same metal tape blank with lead portion profile A and B, thereby, can eliminate the change in electrical characteristics that the difference a little because of material component causes.
Advantage according to the manufacture method of the connector that is used for electronic device of the present invention is, even the lead portion profile that will make is increased to four kinds from two kinds, production efficiency is also constant, referring to Fig. 2.
According to the manufacture method that is used for the connector of electronic device of the present invention, comprising: each step, also forming one each other makes the connector with multiple lead portion profile by stacked all lead portion profiles of finishing; Second step cuts into these connectors separating the connector that has various lead portion profiles the step of connector from the delivery part, can make the equivalent connector of different profiles.Therefore, can provide connector continuously in socket assembly process step.
Owing to can cut off the different connectors of providing leaded part profile A and B from same metal tape, therefore, can eliminate the electrical property change that causes because of raw materials variations.
The band that patches continuously of punching press is connected with delivery part 28 through a plurality of lead portion.Therefore, these lead portion are connected with delivery part securely, thereby can prevent that lead portion 25b is out of shape in the course of conveying between subsequent step and/or each step.
Claims (8)
1. make continuously from metal tape and to have touching part and being located at the method for several connectors of the lead portion on two or more diverse locations of profile unanimity for one kind, comprise following processing step:
A) the blank metal tape is struck out elementary blank metal tape, wherein, each touches part and forms as one with the lead portion that is located in two or more diverse locations, makes the described a plurality of lead portion of described each contacting part lease making be connected with a delivery part continuously;
B) cut off with have a given priority describedly touch that part is connected and be located at the abutting end of the lead portion on the primary importance and the connection between the described delivery part, and be breaking at the connection between dividing of the abutting end of other the locational lead portion except that primary importance and described contacting part, thus, make first connector that is used for electronic device, it has the lead portion on primary importance; With
C) cut off the connection between abutting end that be connected and that be located at the lead portion on the second place and the described delivery part with described contact portion with given priority, and be breaking at the connection between dividing of the abutting end of other the locational lead portion except that the second place and described contacting part, thus, make second connector that is used for electronic device, it has the lead portion on the second place.
2. the manufacture method that is used for the connector of electronic device according to claim 1, wherein, step b) and c) carry out simultaneously so that make two kinds of connectors that are used for electronic device simultaneously.
3. the manufacture method that is used for the connector of electronic device according to claim 2 wherein, uses two adjacent described parts that touch to repeat to make described first and second connectors that are used for electronic device.
4. according to claim 2 or the 3 described manufacture methods that are used for the connector of electronic device, also comprise being used for two kinds of steps that connector sorted and carried with skewed slot separately these two kinds of connectors of electronic device.
5. make continuously from metal tape and to have touching part and being located at the equipment of several connectors of the lead portion on two or more diverse locations of profile unanimity for one kind, comprising:
A) decompressor, be used for the blank metal tape is struck out elementary blank metal tape, wherein, each contact portion forms as one with the lead portion that is located on two or more diverse locations, makes described each contact portion be connected with a delivery part continuously through described a plurality of lead portion;
B) first shearing device, be used to cut off with the described part that touches with given priority and be connected and be located at the abutting end of the lead portion on the primary importance and the connection between the delivery part, and be breaking at the connection between dividing of abutting end in other locational lead portion except that primary importance and described contacting part, thus, make first connector that is used for electronic device, it has the lead portion that is positioned on the primary importance;
C) second shearing device, be used to cut off with the described part that touches with given priority and be connected and be located at the abutting end of the lead portion on the second place and the connection between the delivery part, and be breaking at the connection between dividing of abutting end in other locational lead portion except that the second place and described contacting part, thus, make first connector that is used for electronic device, it has the lead portion that is positioned on the second place.
6. according to the manufacturing equipment of the connector that is used for electronic device of claim 5, wherein, the setting adjacent one another are of described first and second shearing devices, make these two devices operate, with by making first and second connectors that are used for electronic device simultaneously with two adjacent described parts that touch with the method for synchronization.
7. according to the manufacturing equipment of the connector that is used for electronic device of claim 5 or 6, wherein, be used for skewed slot to two kinds of connectors letter sortings of electronic device and be located at and be right after below first and second shearing devices.
8. one kind is used to make the connector band that touches the part and the continuous punching press of several connectors that are used for electronic device that are located at the lead portion on two or more diverse locations with shape unanimity, comprising:
Longitudinally continuous delivery part;
Along the described a plurality of parts that touch that deliver the shape unanimity of part setting; With
With each described part and described lead portion that partly forms one that delivers on two or more diverse locations of touching, each described contact portion is partly supported by described continuous delivery through described a plurality of lead portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP305499/1996 | 1996-11-01 | ||
| JP8305499A JPH10134928A (en) | 1996-11-01 | 1996-11-01 | Manufacture of contact for electronic equipment, manufacturing device and continuous stamped contact belt body to be used therefor |
| JP305499/96 | 1996-11-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1181290A true CN1181290A (en) | 1998-05-13 |
| CN1070743C CN1070743C (en) | 2001-09-12 |
Family
ID=17945902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97114887A Expired - Fee Related CN1070743C (en) | 1996-11-01 | 1997-07-15 | Process for manufacturing contacts for electronics devices, manufacturing apparatus for carrying out same process and continuous strip material for stamping used for the same process |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH10134928A (en) |
| KR (1) | KR100335790B1 (en) |
| CN (1) | CN1070743C (en) |
| MY (1) | MY121234A (en) |
| TW (1) | TW381046B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067493C (en) * | 1998-11-06 | 2001-06-20 | 富金精密工业(深圳)有限公司 | Terminal strip structure for electric connector and its making method |
| CN105418354A (en) * | 2010-12-21 | 2016-03-23 | 埃克森美孚化学专利公司 | Process for producing a monocycloalkyl-substituted aromatic compound |
| CN106350859A (en) * | 2016-10-19 | 2017-01-25 | 东莞市杰精精密工业有限公司 | Continuous material belt, continuous electroplating machine for connector shell and continuous electroplating process thereof |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950908B (en) * | 2010-09-14 | 2012-12-12 | 番禺得意精密电子工业有限公司 | Method for breaking terminal material tape combination |
| CN103084653B (en) * | 2011-10-31 | 2016-04-20 | 西门子数控（南京）有限公司 | A kind of terminal Preparation equipment and terminal preparation method |
| CN102922660B (en) * | 2012-11-02 | 2015-12-16 | 苏州技泰精密部件有限公司 | Punching press injection moulding continuous strip material and manufacture method thereof |
| CN105921622B (en) * | 2016-06-08 | 2018-07-31 | 惠州智科实业有限公司 | It is used to prepare the mold of the radiator with length cooling fin |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60101888A (en) * | 1983-10-31 | 1985-06-05 | アンプ インコーポレーテッド | Electric connector |
| US5235743A (en) * | 1990-07-11 | 1993-08-17 | Yazaki Corporation | Method of manufacturing a pair of terminals having a low friction material on a mating surface to facilitate connection of the terminals |
-
1996
- 1996-11-01 JP JP8305499A patent/JPH10134928A/en active Pending
-
1997
- 1997-06-28 TW TW086109221A patent/TW381046B/en not_active IP Right Cessation
- 1997-07-03 MY MYPI97003018A patent/MY121234A/en unknown
- 1997-07-15 KR KR1019970032785A patent/KR100335790B1/en not_active IP Right Cessation
- 1997-07-15 CN CN97114887A patent/CN1070743C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067493C (en) * | 1998-11-06 | 2001-06-20 | 富金精密工业(深圳)有限公司 | Terminal strip structure for electric connector and its making method |
| CN105418354A (en) * | 2010-12-21 | 2016-03-23 | 埃克森美孚化学专利公司 | Process for producing a monocycloalkyl-substituted aromatic compound |
| CN106350859A (en) * | 2016-10-19 | 2017-01-25 | 东莞市杰精精密工业有限公司 | Continuous material belt, continuous electroplating machine for connector shell and continuous electroplating process thereof |
| CN106350859B (en) * | 2016-10-19 | 2019-01-25 | 东莞市杰精精密工业有限公司 | Continuous material strip, connector shell continuous electric plating device and its continuous plating process |
Also Published As
| Publication number | Publication date |
|---|---|
| MY121234A (en) | 2006-01-28 |
| KR100335790B1 (en) | 2003-04-16 |
| TW381046B (en) | 2000-02-01 |
| KR19980041784A (en) | 1998-08-17 |
| JPH10134928A (en) | 1998-05-22 |
| CN1070743C (en) | 2001-09-12 |
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