KR100876919B1 - Constant Anodizing film jig - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a jig for uniform coating, and the constitution of the present invention is that the connecting member 14 is arranged in a direction intersecting the circumference of the hook member 12 having the hook portion 12a formed at least at one end thereof. It is composed of a jig body 10, a resistor 20 connected to the distal end of the connecting member 14, and a rack 30 connected to the resistor 20 to hang the workpiece (1) It features.

Therefore, the effect of the present invention can prevent the film defects from being generated by the overcurrent, and can contribute to the saving of resources by preventing expensive waste of raw materials, the film thickness of the coating is made uniform, it can be expected to improve the quality of the product It is possible to prevent the occurrence of sparks due to contact resistance at the contact between the racking portion of the coating jig for coating and the coating, thereby preventing the film defect due to the spark.

Coating, overheating, defect, resistor, rack, racking part, heat exhaust hole

Description

Uniform film jig {Constant Anodizing film jig}

1 is a side view conceptually showing the structure of a first embodiment of the present invention;

2 and 3 are front and side views of the rack, which is a main part of the present invention;

4 is a view showing a connection structure of a resistor and a rack, which is an essential part of the present invention;

5 conceptually shows the structure of a second embodiment of the present invention;

6 conceptually shows the structure of a third embodiment of the present invention;

7A and 7B are views for explaining the fourth embodiment of the present invention.
Figure 8 is a perspective view showing the configuration of the rack and the resistor which is the main part of the present invention

<Description of the symbols for the main parts of the drawings>

10. Jig Body 20. Resistance Body

30. Rack

The present invention relates to a jig for uniform coating, and more particularly, to prevent plating defects from occurring on the coating due to overcurrent, to prevent waste of expensive raw materials, and to uniformly coat the coating to improve product quality. The present invention relates to a jig for uniform coating that can be expected.

In general, the coating is to form a thin coating of metal or alloy on the surface of the coating, there are various methods such as anodizing, electropolishing, electroless plating, electroplating.

In this case, in the case of a mobile phone case, magnesium plating is usually performed. In order to perform such a magnesium coating, a jig is used so that the mobile phone case (hereinafter referred to as a coating object) in the coating liquid does not shake or sink to the bottom of the plating bath. do.

In other words, after the coating is applied to the film jig, the jig is hung on the anode electrode rod to immerse the coating in the film solution of the coating bath, and the magnesium plate is used as the cathode. can do.

However, in the related art, the instantaneous overcurrent flows to a part of the coating jig for which the coating is applied, and thus a partial burst occurs in the mobile phone case, thereby causing a defect in the product. Particularly, a square hole is formed in the mobile phone case. As a result, a burst phenomenon occurs due to an overcurrent in the inner four corners of the square hole, which causes a lot of product defects. In addition, due to such an overcurrent, a relatively high-quality product such as a mobile phone case is generated, and there are various problems such as waste of expensive raw materials.

In addition, in the related art, since a uniform film is not formed on the coated object due to the potential difference, the contact resistance, the concentrated resistance, etc. of each part of the jig, there is a disadvantage that the quality of the product is deteriorated. In other words, the thickness of the coating on the surface of the coating is proportional to the amount of current flow. However, since the current does not flow uniformly due to the potential difference and the contact resistance, the coating may not be uniformly formed.

In particular, a spark is generated instantaneously due to the contact resistance generated between the jig for the coating and the object to be coated, and there is a problem that the coating is damaged due to the sparking resulting in poor plating.

The present invention has been proposed in view of the above problems, and an object of the present invention is to prevent plating defects from occurring on the workpiece due to overcurrent, to prevent expensive raw material waste, thereby contributing to resource saving, and coating of the coating It is to provide a jig for a uniform coating of a new configuration that can be expected to improve the quality of the product is made uniform thickness.

In addition, an object of the present invention is to provide a uniform coating jig that can prevent the occurrence of sparks due to the contact resistance in the contact between the coating jig and the coating to prevent the plating defect due to the spark in advance. .

According to the present invention for realizing such an object, the jig body 10 formed with a connecting member 14 in a direction intersecting the circumference of the hook member 12 having a hook portion 12a formed at least at one end thereof. , Jig for uniform coating, characterized in that it comprises a resistor 20 connected to the distal end of the connecting member 14 and the rack 30 is connected to the resistor 20 to hang the workpiece 1 Is provided.

The resistor 20 is composed of a sheet metal resistor, characterized in that both ends of the resistor 20 are connected to the connecting member 14 and the rack 30, respectively.

The rack 30 is manufactured in a shape having a pair of inclined portions 34 which are separated from each other toward both ends at the intermediate connecting portion 32 toward the front, and inside the inclined portion 34 at the tip of the inclined portion 34. It is characterized in that the racking portion 36 is formed to be bent to form a heat discharge hole (36a) between the side or the outer surface.

The racking portion 36 is bent in a circular shape when viewed from the side of the rack 30, characterized in that the heat discharge hole (36a) has a circular shape.

The rack 30 is characterized in that made of titanium.

The connecting member 14 has a plurality of horizontal connecting members 14v and a plurality of vertical connecting members 14h connected to each other on the periphery of the hook member 12 so that the jig body 10 has a rectangular shape. The resistor 20 and the rack 30 are sequentially connected to the circumference of the rectangular jig body 10 in a horizontal direction.

The connecting member 14 of the jig body 10 has a plurality of vertical connecting members 14h connected to the distal ends of the plurality of horizontal connecting members 14v disposed radially around the hook member 12 and the A plurality of circular connecting members 14c are disposed at the outer portion of the vertical connecting member 14h so that the jig body 10 is configured to have a cylindrical shape, and the outer peripheral portion of the cylindrical jig body 10 is disposed at the outer periphery of the cylindrical jig body 10. The resistor 20 and the rack 30 is characterized in that sequentially connected in the horizontal direction.

The jig body 10 is characterized in that the silver plated on the surface of the base material made of copper.

The magnesium plate 50 is freshly immersed in the plating liquid of the plating bath 40 in a vertical direction so as to be located outside the jig body 10, and the plurality of perforations 52 disposed in the vertical and horizontal directions in the magnesium plate 50. A perforation part 55 having a 53 is provided, and the perforation part 55 includes a first perforation part 55a formed of a plurality of perforations 52 disposed at a portion facing the central part of the jig body 10. The second perforation part 55b is disposed in the up and down direction of the first perforation part 55a and includes a plurality of perforations 53 having a diameter larger than that of the perforation 52 of the first perforation part 55a. Characterized in that configured to include.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a side view conceptually showing the structure of a first embodiment of the present invention, Figures 2 and 3 are a front view and a side view of the rack, which is the main part of the present invention, Figure 4 is a connection structure of the resistor and the rack, which is the main part of the present invention 5 is a conceptual view showing the structure of a second embodiment of the present invention, FIG. 6 is a conceptual view showing the structure of a third embodiment of the present invention, and FIGS. 7A and 7B are a fourth embodiment of the present invention. A diagram for explaining. Referring to this, the present invention is configured by sequentially connecting the resistor and the rack to the circumference of the jig body.

The jig body 10 has a hook member 12 having a hook portion 12a formed at one end thereof, and a connecting member 14 connected in a direction crossing the hook member 12. The hook member 12 has a bar shape extending in the vertical direction. In addition, the connecting member 14 is disposed in the circumferential portion of the hook member 12 in the horizontal direction, and the connecting member 14 is disposed to be spaced apart by a predetermined interval in the vertical direction of the hook member 12.

One end of the resistor 20 is connected to the front end of the connecting member 14 and disposed in a horizontal direction with respect to the hook member 12. In addition, the rack 30 to be described later is connected to the other end of the resistor 20. At this time, the resistor 20 is preferably composed of a sheet metal resistance.

The rack 30 is manufactured in a shape having a pair of inclined portions 34 which are separated from each other toward the front at both ends of the intermediate connecting portion 32. 4 and 8, the connecting piece 32a in the form of a metal plate is welded to the outer surface of the intermediate connecting portion 32 of the rack 30, and the rack 30 is plated by the connecting piece 32a. The other end of the resistor 20 composed of a type metal resistor is mounted and connected with a bolt 3 and a nut 4. In addition, the connecting member 14 of the jig body 10 is configured in the form of a metal plate, and the bolt (in the state in which the one end surface of the resistance member 20, which is the metal plate-like connecting member 14 and the plate-shaped metal resistor, abuts on each other. 3) and nut (4).

At this time, the bolt (3) and the nut (4) is preferably made of copper, and if the bolt (3) and nut (4) is made of copper, the jig body 10, the resistor 20 and the rack 30 The energization between) can be made more smoothly.

Further, a racking portion 36 bent to form a heat discharge hole 36a between the inclined portion 34 and the inner surface or the outer surface of the inclined portion 34 is formed at the tip end of the inclined portion 34. At this time, the racking portion 36 is bent in a circular shape when viewed from the side of the rack 30, the heat discharge hole (36a) has a circular shape. At this time, preferably the rack 30 is bent into a titanium plate.

On the other hand, the jig of the present invention is configured to be concealed by PE coating except for the hook portion 12a and the titanium rack 30 of the hook member 12. That is, the entire jig of the present invention is coated with PE to peel off the PE coating film from the hook portion 12a and the rack 30 of the hook member 12 to hang the hook portion 12a of the hook member 12. ) Part is exposed to the outside.

According to the present invention having such a configuration, the plating tank 40 has a hook portion 12a formed in the hook member 12 so as to be located between the pair of magnesium plates 50 disposed on both sides of the plating tank 40. The coated object 1 (in the present invention, a cell phone case) is immersed in the coating liquid 44 by hanging on an electrode rod (not shown) of a cathode disposed horizontally on the upper side, and an electric current is applied to cause the coated object 1 to be plated with magnesium.

At this time, in the present invention, the resistor 20 is connected between the horizontal connecting member 14 of the jig body 10 and the rack 30, and an overcurrent is applied to the workpiece 1 by the resistance of the resistor 20. Since the flow can be prevented, it is possible to prevent the bursting phenomenon (particularly, the bursting of the inner corner portion of the square hole formed in the mobile phone case) of the plating film of the workpiece 1 due to the overcurrent, and thus, the film There is an effect of preventing the occurrence of product defects due to overcurrent.

In addition, the present invention allows the current to flow uniformly to the object 1 by the resistance of the resistor 20, so that the film is uniform throughout, thereby improving the quality of the product.

On the other hand, the resistor 20 is composed of a plate-type metal resistor, it is possible to reduce the concentrated resistance to make the plating film more uniform. That is, when passing through the contact surface with a small current, the path of the current is reduced and is generated according to the potential difference generated inside the metal, which is called a concentrated resistor. In order to reduce the concentrated resistance, it is preferable to increase the concentrated area.

Therefore, as shown in Fig. 8, in the present invention, by adopting a plate-type metal resistor as the resistor 20, it is possible to prepare for the concentrated resistance, so that the effect of coating the coating on the coating 1 evenly can be obtained more reliably. Can be.

In addition, a racking portion 36 bent to form a heat discharging hole 36a between the inclined portion 34 and the inner surface or the outer surface of the inclined portion 34 is formed at the front end of the inclined portion 34 of the rack 30. As a result, high heat is prevented from occurring in the racking unit 36 in contact with the workpiece 1.

That is, when electricity flows in a state in which metals are in contact with each other, a phenomenon in which electrical resistance is higher than other portions of the contact portion is called a contact resistance, and the racking part 36 and the workpiece 1 are caused by the contact resistance. While high heat is generated at the contact portion of the plated film, damage is caused to the plated film, resulting in a film defect.

However, in the present invention, the heat can be cooled by the heat dissipation hole 36a formed at the front end of both racking parts 36 of the rack 30 to which the workpiece 1 is in contact.

That is, the hook portion of one end of the hook member 12 in a state in which the workpiece 1 (that is, a mobile phone case) is sandwiched between the racking portions 36 on both sides of the rack 30 constituting the jig of the present invention. 12a) is hung on the electrode rod 42 of the anode to plate the coating object 1 in the film solution 44 of the coating bath 40, and at this time, to move the jig itself in the vertical direction to make the plating more smooth. do. Since the structure for moving the jig itself up and down as described above is generally adopted, a detailed description and drawings thereof will be omitted.

Therefore, when the workpiece 1 is sandwiched between both racking portions 34 of the rack 30 to move the entire jig of the present invention in the vertical direction, the circular shape formed by the racking portion 36 of the rack 30 is moved. Since the flow of the coating liquid is generated by the heat dissipation hole 36a to cool down while cooling the high heat due to the contact resistance, the instant spark does not occur. Therefore, the present invention has an effect of preventing defects in the plated film due to the high heat according to the contact resistance between the contact portion with the workpiece 1.

At this time, when viewed from the side of the rack 30, the heat discharge hole (36a) is made of a circular, the flow of the plating liquid can be made more smoothly.

In addition, since the rack 30 is made of a titanium plate, it is possible to prevent the rack 30 from being corroded by repeated coatings several times, so that the structure of the jig becomes more robust and the life is extended. Has the effect of.

On the other hand, as shown in Figure 5, the connecting member 14 is a plurality of horizontal connecting member (14v) and a plurality of vertical connecting member (14h) are arranged to be connected to each other around the hook member 12, The jig body 10 is configured to form a rectangle. In addition, a horizontal connecting member 14v is further connected to a circumferential portion of the rectangular jig body 10, specifically, the outermost connecting portion of the horizontal connecting member 14v and the vertical connecting member 14h. One end of the resistor 20 is connected to the front end of the horizontal connecting member 14v, and the rack 30 is connected to the other end of the resistor 20. This rectangular jig is used when the coating tank 40 is rectangular.

In addition, as shown in FIG. 6, the intermediate connecting member 14 of the jig body 10 has a plurality of horizontal connecting members 14v at the distal end of the hook member 12. The vertical connecting member 14h is connected, and a plurality of circular connecting members 14c are disposed at the outer portion of the vertical connecting member 14h so that the jig body 10 is configured to have a cylindrical shape. In addition, the resistor 20 and the rack 30 are sequentially connected to the circumference of the cylindrical jig body 10 in the horizontal direction. The connection structure of the resistor 20, the rack 30, and the connecting member 14 of FIG. 6 is the same as that of FIG. 5. And, this cylindrical jig is used when the coating tank 40 is cylindrical.

According to the present invention of FIGS. 5 and 6, a larger number of workpieces 1 can be coated on a jig at a time, thereby improving productivity and dispersing more concentrated resistance. It also has the effect of making the film of 1) more uniform.

In addition, the magnesium plate 50 in the vertical direction to the plating liquid 44 of the coating bath 40 to be positioned outside the jig body 10, the plurality of magnesium plates 50 arranged in the vertical and horizontal directions The perforation part 55 which has two perforations 52 and 53 is formed. In addition, the perforation part 55 of the magnesium plate 50 is a first perforation part 55a made up of a plurality of perforations 52 disposed at a portion facing the central part of the jig body 10, and the first perforation part 55a. The second perforation part 55b is disposed in the vertical direction of the perforation part 55a and includes a plurality of perforations 53 having a larger diameter than the perforation 52 of the first perforation part 55a. .

The reason why the perforated part 55 of the magnesium plate 50 is formed of the second perforated part 55b having a relatively large diameter with the first perforated part 55a will be described. When all the perforations 8 of the plate 50 are formed with the same diameter, since distribution of the amount of electric current I is reduced in the center part of a jig | tool, a uniform film cannot be formed in the to-be-coated object 1.

However, in the present invention, the first perforated portion 55a of the portion of the magnesium plate 50 that faces the central portion of the film jig is composed of perforations 52 having a smaller diameter than the second perforated portion 55b. Since the distribution of the amount of current I in the center as well as the upper and lower portions of the plating jig is made the same, there is an effect that a uniform film is formed on the workpiece 1.

In addition, the jig body 10 is produced by silver plating on the surface of the base material of copper, there is also an effect that the contact resistance of the connection portion of each part is minimized.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various permutations, modifications, and changes can be made without departing from the spirit of the present invention. It will be apparent to those who have it.

According to the present invention as described above, it is possible to prevent film defects from occurring on the coating due to overcurrent, and to prevent expensive waste of raw materials, thereby contributing to resource saving, and to improve the quality of the product by making the coating thickness of the coating uniform. A new construction of uniform coating jig can be provided.

According to the present invention, there is provided a uniform coating jig which can prevent sparks due to contact resistance on the contact portion between the racking portion of the coating jig and the coating, thereby preventing film defects due to the spark in advance. Can be.

Claims (9)

delete And a jig body 10 formed by connecting the member 14 in a direction intersecting the circumference of the hook member 12 having the hook portion 12a formed at least at one end thereof, and connected to the distal end of the connecting member 14. Resistor 20 and the rack 30 is connected to the resistor 20 to hang the workpiece 1, The resistor 20 is composed of a plate-shaped metal resistor, jig for uniform coating, characterized in that both ends of the resistor 20 is connected to the connecting member 14 and the rack 30, respectively. According to claim 2, The rack 30 is made of a shape having a pair of inclined portion 34 to be separated from each other toward the front from both ends of the intermediate connecting portion 32, the inclined portion on the front end of the inclined portion (34) A uniform coating jig, characterized in that the racking portion 36 is formed to be formed to form a heat discharge hole (36a) between the inner surface or the outer surface of the portion (34). 4. The uniform coating jig according to claim 3, wherein the racking part (36) is bent in a circular shape when viewed from the side of the rack (30), and the heat discharging hole (36a) has a circular shape. The uniform coating jig according to claim 4, wherein the rack (30) is made of titanium. According to claim 2, The connecting member 14 is a plurality of horizontal connecting member (14v) and a plurality of vertical connecting member (14h) is arranged in the circumference of the hook member 12, the jig body ( 10) is configured to form a rectangle, jig for uniform coating, characterized in that the resistor 20 and the rack 30 is sequentially connected in the horizontal direction to the circumference of the rectangular jig body (10). According to claim 2, The connecting member 14 of the jig body 10 is a plurality of vertical connecting member (14v) at the front end of the plurality of horizontal connecting members (14v) disposed radially around the hook member (12) 14h) is connected and a plurality of circular connecting members 14c are arranged to be connected to the outer portion of the vertical connecting member 14h, so that the jig body 10 is configured to have a cylindrical shape, and the cylindrical jig body 10 Jig for uniform coating, characterized in that the resistor 20 and the rack 30 are sequentially connected to the outer peripheral portion in the horizontal direction. 3. The uniform coating jig according to claim 2, wherein the jig body (10) is made by plating silver on the surface of the base material made of copper. The magnesium plate 50 of claim 2, wherein the magnesium plate 50 is dehydrated in a direction perpendicular to the plating liquid of the plating bath 40 so as to be located outside the jig body 10. The perforation part 55 is provided with a plurality of perforations 52 and 53 arranged in the vertical and horizontal direction, the perforation part 55 is a plurality of parts disposed in the part facing the central portion of the jig body 10 A plurality of first perforations (55a) consisting of the perforations (52), and the plurality of first and second perforations (55a) are disposed in the vertical direction and larger in diameter than the perforations (52) of the first perforations (55a) Jig for uniform coating comprising a second perforation (55b) consisting of a perforation (53).

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