JP6473585B2 - Plating equipment with oscillating barrel - Google Patents

Description

The present invention relates to a plating apparatus including a swing barrel .

  As a barrel used for electroplating, a swing barrel that is used while swinging in a cradle shape in a plating tank is known (see, for example, Patent Document 1). The swing barrel is provided with a pair of end walls provided apart from each other along a swing center set in the horizontal direction, and surrounding the outer peripheral portion of the end wall in a state of crossing between the pair of end walls. A cylindrical wall having a hexagonal cylindrical shape, and a portion of the cylindrical wall in the circumferential direction (one of the six surfaces) is formed with a loading / unloading port for the article to be plated. The swing barrel may be used as a so-called open barrel with the inlet / outlet opened.

  In this oscillating barrel, the part between the oscillating centers provided on the pair of end walls is held horizontally, and the product to be plated is put in from the loading / unloading port with the loading / unloading port facing upward. Therefore, before the swing barrel is swung, the product to be plated is deposited on a portion (hereinafter referred to as “bottom plate”) of the cylindrical wall that is disposed directly below the loading / unloading port.

Japanese Patent Publication No.1-15600

  The cylindrical wall of the oscillating barrel is formed of a perforated plate in order to allow the plating solution to enter when the oscillating barrel is immersed in the plating tank. However, in order to prevent the article to be plated from falling off, the hole diameter has to be reduced naturally, and the flow resistance of the plating solution is increased. Therefore, the plating solution that has entered the swing barrel hardly circulates inside or outside the barrel to the extent that the swing barrel is swung.

As a result, the plating solution confined in the rocking barrel has a concentration that decreases with the lapse of the plating time. From the viewpoint of securing plating thickness and preventing uneven plating, a high voltage is required. Continued to be applied. This has been a major bottleneck in reducing costs.
In addition, when the swing barrel after the product to be plated is loaded starts to swing, the deposition state of the product to be plated collapses as the angle of the bottom plate tilts, and is biased to one side (below the bottom plate tilt). It becomes like this. However, when the swinging direction of the swinging barrel is reversed, the collapsed state starts to move in the opposite direction and becomes biased toward the opposite side in the barrel, and thereafter, the collapsed state is only repeated. . Such movement of the products to be plated is minimal, and individual products to be plated are unlikely to roll apart and roll. For this reason, the stirring action for bringing the plating solution into contact with the entire surface of the product to be plated is insufficient, so that the plating is poor and uneven plating may occur.

The present invention has been made in view of the above circumstances, and is a plating apparatus provided with a swing barrel capable of achieving low cost related to plating while achieving uniform quality and maintaining and improving quality. The purpose is to provide.

In order to achieve the above object, the present invention has taken the following measures.
That is, the plating apparatus including the swing barrel according to the present invention includes a swing barrel that is swingably held with a swing center set in the horizontal direction as a fulcrum, and the swing barrel immersed in the plating tank. A swing mechanism that reciprocally swings around the swing center in a state, and the swing barrel includes a pair of end walls provided apart from each other along the swing center, and A water-permeable cylindrical wall provided so as to surround the outer peripheral portion of the end wall in a state across a pair of end walls, and the article to be plated disposed on a part of the circumferential direction on the cylindrical wall And a bottom plate that is disposed directly below when the inlet / outlet is directed upward, and an inclined plate that is disposed on both sides of the swinging direction with respect to the bottom plate and is made higher as it goes outward, The swing mechanism is moved forward by swinging one of the swing barrels. One of the inclined plates is tilted from the horizontal position where it replaces the bottom plate until it is in the opposite phase, and at this time, one opening edge at the inlet / outlet is submerged from the water surface of the plating solution in the plating tank, and the other opening edge is The plating solution has a deflection angle exposed above the water surface of the plating solution, and the water surface of the plating solution spreading in the barrel through the inlet / outlet opened on the plating solution water surface in the plating tank is in the reverse phase. It is characterized in that the rocking barrel is repeatedly swung in the reverse direction after being pushed up by the inclined plate to drive out the plating solution in the barrel to the plating tank.

The rocking barrel has a depth between the bottom plate and the rocking center portion as compared with a height dimension between the rocking port and the rocking center portion when the loading / unloading port is directed right above. It is preferable that the oscillating center portion be arranged eccentrically upward from the center in the vertical direction of the cylindrical wall so that the dimension becomes larger.
The cylindrical wall may be provided with stirring protrusions protruding inward from the cylindrical wall at a plurality of locations including the bottom plate and two positions on both sides of the bottom plate in the swinging direction.

In the plating apparatus provided with the swing barrel according to the present invention, it is possible to achieve cost reduction related to plating while achieving uniform quality and maintaining and improving quality.

In the plating apparatus which concerns on this invention, it is a sectional side view which showed the operation | movement condition of the rocking | fluctuation barrel, (a) is the condition swung to the left in the figure, (b) is a neutral condition, (c) Is the situation where it is swung to the right in the figure. It is the perspective view which showed the rocking barrel used for the plating apparatus which concerns on this invention. It is front sectional drawing which showed the plating apparatus which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 3 shows a plating apparatus 1 according to the present invention. The plating apparatus 1 includes a swing barrel 2 that is swingably held with a swing center P set in a horizontal direction as a fulcrum, and a swing center that is immersed in the plating tank 3. And a swing mechanism 4 that swings back and forth in a swinging manner around P.

In the example shown in the figure, two swinging barrels 2 are connected side by side. However, only one swinging barrel 2 may be used. The number of swing barrels 2 connected may be three or more.
As shown in FIG. 1 and FIG. 2, the swing barrel 2 has a pair of end walls 7, 7 provided away from each other along the swing center P, and a state extending between the pair of end walls 7, 7. And a water-permeable cylindrical wall 8 provided so as to surround the outer peripheral portion of the end wall 7. The end wall 7 and the cylinder wall 8 are made of an insulating material such as vinyl chloride resin.

  As described above, in the present embodiment, the two swing barrels 2 are connected laterally. Therefore, each swing barrel 2 is assumed to have a pair of end walls 7, 7. However, only one end wall 7 of the connecting portion is provided between the two swing barrels 2 and shared. Alternatively, it can be omitted. That is, in the case of the connection type as shown in the present embodiment, the end wall 7 of the connection part functions as a partition wall, and what can be originally called “a pair of end walls 7, 7” It will be arranged on the most end side in the direction (same as the cylinder axis direction as the cylinder wall 8) which becomes longer by the connection.

  The end wall 7 is for closing both ends of the cylinder wall 8 in the cylinder axis direction to prevent the article to be plated from falling off. In the present embodiment, an electrode hole 13 (see FIG. 3) for inserting the cathode electrode 12 is formed in the end wall 7 at a position matching the swing center P. A swing center portion 15 for swingably holding the swing barrel 2 using the electrode holes 13 is provided (see FIG. 3).

  The cylindrical wall 8 is formed in a rectangular tube shape (hexagonal tube shape in the illustrated example), and a portion (one surface of six surfaces) forming a part in the circumferential direction is projected into a convex shape. The protruding end side of the convex portion is opened in a rectangular shape. The opening portion of the convex portion is used as a loading / unloading port 10 used when a product to be plated is charged or discharged. In addition, when forming this entrance / exit 10, the protrusion shape of a convex part shape is not necessarily required.

In such a cylindrical wall 8, a wall material covering a plurality of surfaces (5 surfaces of six surfaces in the illustrated example) excluding the surface on which the entrance / exit 10 is formed is provided. Many small holes that do not allow the product to be plated to pass but do not hinder the flow of the plating solution are formed, and water permeability inside and outside the barrel is secured.
In the present embodiment, as described above, the cylindrical wall 8 is formed in a hexagonal cylindrical shape. Here, between the swing center portions 15, 15 provided on the pair of end walls 7, 7 (the portion through which the swing center P passes and the center of the electrode hole 13) is held horizontally, the access port 10 is When facing upward (see FIG. 1B), a portion (hereinafter referred to as “bottom plate 8a”) disposed immediately below the loading / unloading port 10 is substantially horizontal in the swinging direction of the swinging barrel 2. It is provided at an angle.

  Since the bottom plate 8a is provided at a substantially horizontal angle in this way, when the product to be plated is first put into the swing barrel 2, the product to be plated spreads while the deposition thickness is leveled as much as possible. become. That is, for example, when the bottom plate 8a has a shape in which a part of the upper surface is recessed, the article to be plated moves with respect to the swing of the swing barrel 2 because the article to be plated is concentrated in the recess. There is a problem that it becomes difficult. If it becomes like this, useless stirring sufficient time will be needed as rocking | fluctuation time of the rocking | swiveling barrel 2. FIG. In order to avoid this problem, it is beneficial to level the bottom plate 8a.

In addition, with respect to the bottom plate 8a that is substantially horizontal as described above, inclined plates 8b and 8c having inclinations that become higher toward the outside are provided on both sides of the swing barrel 2 in the swing direction. As a thing. In the present embodiment, each of the inclined plates 8b and 8c has a rising angle θ from the bottom plate 8a of 60 °.
For a plurality of locations including the bottom plate 8a and two positions on both sides of the bottom plate 8a (in this embodiment, a total of three locations including the central portion of the bottom plate 8a and the central portions of the inclined plates 8b and 8c) A stirring protrusion 17 that protrudes inward of the wall 8 is provided. In order to avoid contact buffering with the tip of the electrode 12, the agitation protrusion 17 is divided into two parts in the cylinder axis direction of the cylinder wall 8 so as to be separated from each other.

The swing center portion 15 provided on the end wall 7 is arranged eccentrically upward from the vertical center of the cylindrical wall 8. That is, compared with the height dimension h ₁ between the insertion / exit opening 10 formed in the cylindrical wall 8 and the swinging center portion 15 (portion through which the swinging center P passes), the bottom plate of the tubular wall 8 and the swinging center portion. 15 toward the depth _{h 2} between the (swing center portion P passes) is larger _(h 1 _<h 2).
Therefore, when the swing barrel 2 swings, the swing width of the bottom plate 8 a becomes larger than the swing width of the loading / unloading port 10. Therefore, the closer to the bottom plate 8a, the greater the centrifugal force and inertial force associated with the swinging of the plating solution that has entered the swing barrel 2 and the product to be plated placed on the bottom plate 8a. It is supposed to be.

  As a specific method for decentering the swinging center portion 15 upward with respect to the vertical center of the cylindrical wall 8, there is the following. That is, as a first method, for example, when the cylindrical wall 8 is a regular hexagonal square tube, a method of setting the swing center portion 15 higher than the centroid position can be cited. This first method is the simplest. As a second method, it is assumed that only the upper side of the cylindrical wall 8 is crushed in the height direction on the assumption that the swing center 15 is set at the centroid position when the cylindrical wall 8 is a regular hexagon. There is also a method of making the shape (this embodiment adopts this method).

  On the other hand, the swing mechanism 4 swings the swing barrel 2 around the swing center P so as to swing back and forth in a basket shape. The swing angle of the swing barrel 2 is such that one opening edge of the swing inlet / outlet port 10 of the swing barrel 2 sinks from the surface of the plating solution, and the other opening edge facing the opening edge is exposed above the surface of the plating solution. Is set as the maximum angle (see FIGS. 1A and 1C).

As described above, since the swing center P set in the swing barrel 2 is eccentric upward with respect to the vertical center of the cylindrical wall 8, the rotation of the cylindrical wall 8 that occurs when the swing barrel 2 swings is prevented. , Become eccentric rotation.
Therefore, the following effects can be obtained. That is, when a product to be plated (not shown) is put in the neutral state in FIG. 1B, the swing barrel 2 is swung in one direction (arrow α direction) as shown in FIG. The bottom plate 8a in the cylindrical wall 8 moves so as to rise while gradually increasing the inclination angle. Therefore, the plating solution in the oscillating barrel 2 is subjected to an action (see arrow X) such that the plating solution in the oscillating barrel 2 is gradually pushed out toward the loading / unloading port 10 as the bottom plate 8a rises. Further, the plating solution in the swing barrel 2 is pushed up by the inclined plate 8b that enters the original position of the bottom plate 8a as the bottom plate 8a rises.

  And these actions (centrifugal force and inertial force due to rocking) synergistically cooperate, and one opening edge of the inlet / outlet 10 (opening edge on the side first immersed in the plating liquid by rocking) becomes the plating liquid. When sinking, the plating solution in the rocking barrel 2 is forced out of the barrel (in the plating tank 3). Naturally, after the plating solution is expelled from the swing barrel 2, the same amount of plating solution as the expelled plating solution flows into the swing barrel 2.

Further, the article to be plated in the swing barrel 2 is actively stirred due to the cylindrical wall 8 becoming eccentrically rotated. In addition, the stirring projections 17 provided on the bottom plate 8a and the inclined plates 8b and 8c cause each of the products to be plated to receive a stronger stirring action due to rolling. The plating solution comes into contact evenly.
When the swing barrel 2 is swung in the other direction (arrow β direction) as shown in FIG. 1C, the bottom plate 8 rises in the opposite direction to the above, and the plating solution in the swing barrel 2 The plating solution in the swing barrel 2 is pushed up by the inclined plate 8c that receives the action (see the arrow Y) that pushes out toward the inlet / outlet 10 and enters the original position of the bottom plate 8a. Will be affected.

  Then, as a synergistic effect of these actions, when one opening edge of the inlet / outlet 10 (opening edge on the side previously immersed in the plating solution by swinging) sinks into the plating solution, the plating solution in the swing barrel 2 Will be forced out of the barrel. Naturally, after the plating solution is expelled from the swing barrel 2, the same amount of plating solution as the expelled plating solution flows into the swing barrel 2.

Further, the product to be plated in the swing barrel 2 is powerful because the cylindrical wall 8 is rotated eccentrically and the stirring projections 17 are provided on the bottom plate 8a and the inclined plates 8b and 8c. Since the agitating action is applied, the plating solution comes into contact with the entire surface of the product to be plated.
Thereafter, such an action (X, Y) is repeated, and the article to be plated is stirred in the swing barrel 2 and is always kept in a state filled with a fresh plating solution of a predetermined concentration. . As a result, the processing voltage can be lowered, and the cost can be drastically reduced. Specifically, energy saving can be achieved up to about 75%.

In the case where the rocking center portion 15 is set as it is in the vertical center position of the cylinder wall 8, the cylinder wall 8 simply rotates concentrically, and the plating solution is replaced between the inside and outside of the barrel as described above. Needless to say, there is almost no action, and there is no satisfactory effect on the stirring action of the article to be plated.
Such a rocking mechanism 4 carries the rocking barrel 2 from the upstream process of the plating tank 3 and immerses the rocking barrel 2 in the plating solution stored in the plating tank 3. 2 can be provided to the handling unit 20 of the barrel transfer device configured to lift 2 and carry it out to the downstream process. The specific mechanism is not particularly limited. For example, when the handling unit 20 of the barrel transfer device moves above the plating tank 3, the moving force is used to reciprocate the swing plating 2. It may be configured to cause movement. In addition, it is good also as a structure provided with original motive power sources, such as a link mechanism, a gear mechanism, and a transmission mechanism using a rack and a pinion gear.

By the way, this invention is not limited to the said embodiment, It can change suitably according to embodiment.
For example, in the oscillating barrel 2, the cylindrical wall 8 is not limited to being a square tube, but can be a cylinder. The shape of the end wall 7 is not limited as long as the end of the cylindrical wall 8 can be closed.

The kind of plating and the material and shape of the product to be plated are not limited at all.
The detailed configuration of the swing mechanism 4 is not limited at all.

DESCRIPTION OF SYMBOLS 1 Plating apparatus 2 Oscillating barrel 3 Plating tank 4 Oscillating mechanism 7 End wall 8 Cylindrical wall 8a Bottom plate 8b Inclined plate 10 Loading / unloading port 12 Electrode 13 Electrode hole 15 Oscillating center portion 17 Stirring protrusion 20 Handling portion

Claims (3)

A swing barrel that is swingably held with a swing center set in the horizontal direction as a fulcrum, and the swing barrel is immersed in a plating tank and reciprocally swings around the swing center in a swinging basket shape. And a swing mechanism
  The oscillating barrel includes a pair of end walls provided apart from each other along the oscillating center, and a water-permeable cylindrical wall provided so as to surround the outer peripheral portion of the end wall in a state of crossing between the pair of end walls. The cylindrical wall has a loading / unloading port for an article to be plated disposed at a part in the circumferential direction, a bottom plate disposed immediately below when the loading / unloading port is directed upward, and a swing with respect to the bottom plate. There are inclined plates that are placed on both sides of the moving direction and made higher as it goes outward,
  The swing mechanism tilts one of the inclined plates from the horizontal position where the bottom plate is replaced with the opposite phase by swinging the swing barrel to one side, and at the same time, opens one opening edge at the entrance / exit. It has a deflection angle that sinks from the surface of the plating solution in the plating tank and exposes the other opening edge above the surface of the plating solution, and the opening / closing port opened on the surface of the plating solution in the plating tank The surface of the plating solution spreading in the barrel is pushed up by the inclined plate in the opposite phase, and after the plating solution in the barrel is driven out to the plating tank, the swinging barrel is swung in the reverse direction. The plating apparatus provided with the swing barrel characterized by this. The rocking barrel has a depth between the bottom plate and the rocking center portion as compared with a height dimension between the rocking port and the rocking center portion when the loading / unloading port is directed right above. 2. The plating apparatus having a rocking barrel according to claim 1, wherein the rocking center portion is arranged eccentrically upward from the vertical center of the cylindrical wall so that the dimension becomes larger. 2. The cylindrical wall is provided with stirring protrusions protruding inward of the cylindrical wall at a plurality of locations including the bottom plate and two positions on both sides of the bottom plate in the swinging direction. Or the plating apparatus provided with the rocking | fluctuation barrel of Claim 2.

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