CN1300384C

CN1300384C - Method and apparatus for electroplating

Info

Publication number: CN1300384C
Application number: CNB200310112648XA
Authority: CN
Inventors: 胡自谦
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-11
Filing date: 2003-12-11
Publication date: 2007-02-14
Anticipated expiration: 2023-12-11
Also published as: CN1546738A

Abstract

The present invention discloses a method and an apparatus for electroplating. The present invention has the method that a nonmetal wire net is provided, the dimension of a net hole is smaller than that of an element to be plated, the nonmetal wire net is suspended in a net bag shape, and the element to be plated is poured in the net bag; a metal ball which is arranged is put in the net bag, and the metal ball is connected with a power supply so as to make the metal ball form a cathode which contacts the element to be plated; the net bag is put in electrolyte of a coating bath, slings at both sides of the net bag are lifted up and lowered down respectively so as to make the element to be plated turn over in the net bag, and metal is plated on the element to be plated uniformly; the apparatus for realizing the method comprises a reciprocating mechanism which realizes the lifting turnover of the net bag by the drive of an electric motor. The present invention is suitable for plating small component parts, the electroplating has small barrier resistance, good conductivity, no blind spot, even electroplating layer, and the apparatus has convenient charge and discharge. The apparatus of the present invention has the advantages of simple structure, less investment and good interchangeability.

Description

A kind of electric plating method and equipment thereof

Technical field

The present invention relates to a kind of electric plating method, be specifically related to a kind of electric plating method that is used for finding, the present invention relates to the equipment of implementing this method simultaneously.

Background technology

In electroplating process, unplated piece need be connected with the negative electrode of direct supply, anode with the metal that is used to apply is connected with the anode of direct supply, both are immersed in the electrolytic solution (electroplating solution) that contains metal ion, behind power connection, metal ion is deposited on piece surface and forms metal plating.

For unplated piece is connected with negative electrode, the existing plating method has rack plating, barrel plating, frame plating etc. usually, wherein, rack plating is suitable for bigger unplated piece to be used, and less part generally adopts barrel plating, during barrel plating, employing one is furnished with the barrel plating bucket of aperture, nearly barrel rim place is provided with electrode bar in the barrel plating bucket, and the barrel plating bucket is provided with opening for feed, during plating, finding is put into the barrel plating bucket, close opening for feed, the barrel plating bucket is put into electrolytic solution, utilize rotating mechanism to rotate the barrel plating bucket, finding is contacted with electrode bar, thereby electroplate evenly.

Yet though have a lot of holes on the barrel plating bucket, for keeping the intensity of barrel plating bucket, staving still is made of the larger area non-metallic material, thereby barrier resistance is big, voltage is high.Moreover, barrel plating bucket discharging inconvenience, especially working as unplated piece is slim (thickness is below 0.5 millimeter), or when miniature (size is below 2 millimeters), discharging is very inconvenient, for example, small-sized diode, size is little, and specification is many, and profile is same or similar, be difficult to difference, therefore, prevent that batch mixing is very important, when using the barrel plating bucket, discharging will be accomplished one, and not stay be very time-consuming.

Summary of the invention

The object of the invention provides a kind of electric plating method that is specially adapted to finding, and a kind of equipment that uses this method is provided simultaneously.

For achieving the above object, the technical solution used in the present invention is: a kind of electric plating method, a nonmetal silk screen is provided, and mesh size is hung into net bag shape less than the size of unplated piece with it, and unplated piece is poured in the mesh bag; One Metal Ball is provided, inserts in the mesh bag, be connected, make Metal Ball constitute the negative electrode that contacts with unplated piece with power supply; Described mesh bag is put into the electrolytic solution of coating bath, and the hoist cable of lifting mesh bag both sides is stirred unplated piece in mesh bag respectively, and metal evenly is plated on the unplated piece.

In the technique scheme, described " nonmetal silk screen " is a kind of net of small-bore, for example can use nylon mesh, according to varying in size of unplated piece, can select the silk screen of different meshes, when the part of plating different size, as long as it is just passable to change a silk screen.

In the technique scheme, for guaranteeing galvanized homogeneity, can make the hoist cable of described mesh bag be periodically to-and-fro movement, when a side sling raise, the opposite side hoist cable descended, the stroke of control hoist cable in case unplated piece in mesh bag, drop out.

Wherein, described mesh bag ties up to four jiaos of formations of silk screen respectively by hoist cable, and two hoist cables of the same side are merged into a hoist cable on top, is used to control the mesh bag motion.

For implementing aforesaid method, the technical solution used in the present invention is, a kind of electroplating device, comprise and hold electrolytic solution and the anodic plating tank that is immersed in the electrolytic solution, also include the mesh bag that nonmetal silk screen constitutes, the mesh of silk screen is less than the size of unplated piece, and mesh bag is built-in with the Metal Ball as negative electrode, four jiaos of mesh bag have 2 groups of hoist cables, described 2 groups of hoist cables are placed in respectively on the reciprocating mechanism, form the reversing motion state, and described reversing motion state is meant, when a side sling rises, the opposite side hoist cable descends, otherwise, when a side sling descends, the opposite side hoist cable rises, and described reciprocating mechanism is connected with motor-driven mechanism.

In the technique scheme, described " reciprocating mechanism " can convert the rotation of motor to moving up and down of hoist cable, in 2 hoist cables one when up moving, the corresponding down motion of another root, can constitute by the mechanism of multiple prior art, usually, can comprise that motor, retarding mechanism, bent axle or other convert circumferential motion to straight-line mapping device, and the mechanism that does relatively reciprocating motion is provided.Wherein a kind of form is: described reciprocating mechanism comprises the discoid escapement that is supported by rotating shaft, and described hoist cable is placed on the circumference of escapement, and an escapement nearly circumference place and an eccentric rod are rotationally connected, and eccentric rod is connected with driving mechanism.

In the technique scheme, preferably scheme is, described balance diameter is between 200 millimeters to 350 millimeters, and pendulum angle is between 90 ° to 120 °, and the hunting frequency of described escapement is between 25 times/minute to 45 times/minute.

Another kind of form is, described reciprocating mechanism be that described hoist cable is connected to the two ends of swing arm by the swing arm of rotating shaft support, and swing arm is connected with a reciprocating drive mechanism.

Because the technique scheme utilization, the present invention compared with prior art has following advantage:

1. because the present invention adopts screen net structure to place finding to be plated, compare with barrel plating, barrier resistance is little, conducts electricity, no dead angle, and coating is even, once electroplates 100,000 diode random inspection thickness of coating all between 5～8 μ;

2. silk screen of the present invention is an open architecture, and charging is very convenient with discharging, can put into the coating bath plating in the mesh bag as long as ready unplated piece is poured into, only need mention mesh bag during discharging once going out clearly, and the situation of batch mixing can not take place;

3. the device structure of realizing present method is simple, invest for a short time, and only a nylon mesh of need, a mechanical rocking arm get final product;

4. interchangeability is good, according to the part of different sizes, can choose the silk screen of different meshes wantonly, in the time of plating the part of different size, as long as it is just passable to change a silk screen.

Description of drawings

Accompanying drawing 1 is the structural representation (broken section) of the embodiment of the invention one;

Accompanying drawing 2 is the structural representation (broken section) of right apparent direction among Fig. 1.

Wherein: [1], eccentric rod; [2], back up pad; [3], hook; [4], mesh bag; [5], electrolytic solution; [6], escapement; [7], hoist cable: [8], cathode wire; [9], plating tank; [10], rotating shaft: [16], Metal Ball; [17], strut.

Embodiment

Below in conjunction with drawings and Examples the present invention is further described:

Embodiment one: shown in accompanying drawing 1 and accompanying drawing 2, present embodiment has provided the electroplating device that is used to realize electro-plating method of the present invention, comprise and hold electrolytic solution 5 and the anodic plating tank 9 that is immersed in the electrolytic solution 5, the mesh bag 4 that nonmetal silk screen constitutes, the mesh of silk screen is less than the size of unplated piece, mesh bag 4 is built-in with the Metal Ball 16 as negative electrode, four jiaos of mesh bag 4 have been hung 2 groups of hoist cables 7 respectively, strut 17 can be set with separately two jiaos in every group of hoist cable 7, keep the property held of mesh bag 4 and make unplated piece be easy to upset, 2 groups of hoist cables 7 are placed on the reciprocating mechanism, form the reversing motion state, and described reciprocating mechanism is connected with motor-driven mechanism.

The reciprocating mechanism of present embodiment comprises the discoid escapement 6 that is supported by rotating shaft 10, escapement 6 diameters are 280 millimeters, hang with lifting rope on the circumference of escapement 6, the lifting rope two ends are respectively equipped with a hook 3,2 groups of hoist cables 7 are hung on 2 hooks 3, escapement 6 nearly circumference places and an eccentric rod 1 are rotationally connected, and eccentric rod 1 is connected with driving mechanism.Driving mechanism is by the motor transmission, wherein, can select the alternating current machine (1400 rev/mins) of a 370W to 550W and the speed reduction unit that matches for use, speed ratio is 30: 1, when eccentric rod 1 one ends swayed, the other end was connected to-and-fro movement on the escapement 6, made escapement 6 swings, about 110 ° of pendulum angle, about 35 times/minute of hunting frequency.

The driving mechanism of present embodiment, escapement 6 rotating shafts 10 can be fixed on the support, eccentric rod 1 can select duroplasts or other to have the nonmetal of certain intensity to make, 6 of eccentric rod 1 one ends and escapements are fixed with screw rod, and screw rod constitutes the axle of eccentric rod 1 motion.

Embodiment two: a kind of electroplating device, its structure is identical with electroplating device structure major part among the embodiment one, and its difference is that described reciprocating mechanism is the swing arm that is supported by rotating shaft 10, described hoist cable 7 is connected to the two ends of swing arm, and swing arm is connected with a reciprocating drive mechanism.

Claims

1. electric plating method, it is characterized in that: a nonmetal silk screen is provided, and mesh size is hung into mesh bag [4] shape less than the size of unplated piece with it, and unplated piece is poured in the mesh bag [4]; One Metal Ball [16] is provided, inserts in the mesh bag [4], be connected, make Metal Ball [16] constitute the negative electrode that contacts with unplated piece with power supply; Described mesh bag [4] is put into the electrolytic solution [5] of coating bath, and the hoist cable [7] of lifting mesh bag [4] both sides is stirred unplated piece in mesh bag [4] respectively, and metal evenly is plated on the unplated piece.

2. electric plating method according to claim 1, it is characterized in that: the hoist cable [7] of described mesh bag [4] is periodically to-and-fro movement, when one side sling [7] raise, opposite side hoist cable [7] descended, the stroke of control hoist cable [7] in case unplated piece in mesh bag [4], drop out.

3. electric plating method according to claim 2 is characterized in that: described mesh bag [4] ties up to four jiaos of formations of silk screen respectively by hoist cable [7], and two hoist cables [7] of the same side are merged into a hoist cable [7] on top, is used to control mesh bag [4] motion.

4. electroplating device, comprise and hold electrolytic solution [5] and be immersed in anodic plating tank [9] in the electrolytic solution [5], it is characterized in that: also include the mesh bag [4] that nonmetal silk screen constitutes, the mesh of silk screen is less than the size of unplated piece, mesh bag [4] is built-in with the Metal Ball [16] as negative electrode, and four jiaos of mesh bag [4] have 2 groups of hoist cables [7], and described 2 groups of hoist cables [7] are placed in respectively on the reciprocating mechanism, form the reversing motion state, described reciprocating mechanism is connected with motor-driven mechanism.

5. electroplating device according to claim 4, it is characterized in that: described reciprocating mechanism comprises the discoid escapement [6] that is supported by rotating shaft [10], described hoist cable [7] is placed on the circumference of escapement [6], a nearly circumference place of escapement [6] and an eccentric rod [1] are rotationally connected, and eccentric rod [1] is connected with driving mechanism.

6. electroplating device according to claim 5 is characterized in that: described escapement [6] diameter is between 200 millimeters to 350 millimeters, and pendulum angle is between 90 ° to 120 °.

7. electroplating device according to claim 5 is characterized in that: the hunting frequency of described escapement [6] is between 25 times/minute to 45 times/minute.

8. electroplating device according to claim 4 is characterized in that: the swing arm of described reciprocating mechanism for supporting by rotating shaft [10], and described hoist cable [7] is connected to the two ends of swing arm, and swing arm is connected with a reciprocating drive mechanism.