JP4843315B2 - Barrel for plating - Google Patents

Description

  The present invention relates to a plating barrel used when electroplating relatively small objects.

  When electroplating relatively small parts such as bolts, nuts, and washers, or electrical parts, generally, a square cylindrical basket having a hollow regular hexagonal cross section (this is called a barrel) The barrel plating method is adopted in which the product to be plated is put in, the whole barrel is immersed in the plating solution in a semi-sinked state, and the barrel is rotated around the cylinder axis. Note that a chip-shaped power supply member or an electrode is provided in the barrel, so that a cathode current can be applied in a state where these are in contact with the product to be plated.

This type of barrel is usually made of resin in order to provide resistance to the plating solution and prevent plating. Further, since it is necessary to circulate the plating solution inside and outside the barrel, the peripheral wall of the barrel is formed by a mesh-like plate-like member, a porous plate, or the like (see Patent Document 1, etc.).
By the way, as one of the structures for forming the barrel, a plurality of frame plates formed in a horseshoe shape are alternately stacked in the axial direction with spacers interposed therebetween to form an axial clearance for the spacers between the frame plates. There is known one in which a plating solution is circulated through the gap (see Patent Document 2). This barrel is described to increase the water permeability of the plating solution (increase the hole area ratio of the barrel) and improve the contact of the plating solution with the product to be plated.
JP 2005-281818 A JP 2005-54263 A

In conventional barrels, the peripheral walls of which are made of mesh-clad plate members or perforated plates, the product to be plated frequently comes into contact with these mesh-clad plate members or perforated plates as the barrel rotates. As a cause, remarkable wear occurred on the inner surface of the cylinder in a relatively short period of use.
These plate-like members and perforated plates with mesh have a thickness of about 10 mm, and the upper limit in terms of cost is almost the upper limit. That is, there are shortcomings in that the lifetime as a barrel is short and the running cost increases.

  On the other hand, a barrel formed by alternately laminating a plurality of horseshoe-shaped frame plates and spacers is troublesome because many parts are required for assembly, which increases the product cost. there were. In addition, since the spacers arranged in the circumferential direction of the barrel are in a circular arc shape, there is a drawback in that if the product to be plated is too small, retention due to catching or dropping from the barrel occurs in severe cases ( That is, there is a limit to the size of the product to be plated, and it lacks versatility).

The present invention has been made in view of the above circumstances, and is a plating barrel which has a long life against wear caused by contact with a product to be plated, thereby enabling a reduction in running cost. The purpose is to provide.
It is another object of the present invention to provide a plating barrel that can be manufactured at a low cost and has high size versatility for a product to be plated.

In order to achieve the above object, the present invention has taken the following measures.
That is, the barrel for plating according to the present invention has a main body portion formed in a cylindrical shape with both ends open by a water-permeable peripheral wall, and an end wall provided with both end portions of the main body portion closed. The product to be plated is accommodated in the main body, and is used in a state where it is partially immersed in the plating solution while rotating around a rotation axis set along the cylinder axis of the main body.

The main body portion is formed by connecting a plurality of peripheral wall constituent materials, such as a thin plate-like shape, perpendicular to the rotation axis, while polymerizing them along the rotation axis. Each peripheral wall component is formed with a recess that is recessed in the thickness direction in order to form a water-permeable hole with the peripheral wall component in a polymerization relationship.
And the opening shape of the said recessed part (11) is formed so that a rotation direction may become long compared with the rotating shaft direction of a main-body part (2), in order to prevent the film tension by the surface tension of a plating solution.
As described above, the peripheral wall constituent material and the peripheral wall constituent material are polymerized “directly” with each other, and it is important that no separate member such as a spacer is interposed therebetween. That is, since it is assembled only with the peripheral wall constituting material and the end wall, the number of parts is small, the assembly is easy and the cost can be reduced. Further, since the peripheral wall constituent material and the peripheral wall constituent material are directly polymerized with each other, the assembly strength is strong and the connection is not loosened due to rotational vibration or the like.

Peripheral wall constituent material can be arbitrarily set the dimension along the radial direction of the end wall (thickness of the peripheral wall as the main body), and by making this thicker, it caused contact with the product to be plated Prolongs life against wear. Therefore, the running cost can be reduced.
Furthermore, since the peripheral wall constituent material and the peripheral wall constituent material are directly polymerized with each other and the water permeable holes are formed by the concave portions provided in the peripheral wall constituent material itself, the mutual interval between the water permeable holes in the circumferential direction of the barrel is an appropriate dimension. Can be secured. Therefore, the product to be plated can be prevented from being caught or dropped out, and the permeation hole can be appropriately set so as not to be too large. Therefore, versatility for a small product to be plated can be obtained.

In addition, the opening shape of the recess is formed so that the rotation direction is longer than the rotation axis direction of the main body, so that it is possible to prevent the plating liquid from causing film tension due to surface tension in the recess (water-permeable hole). Since the distribution of the plating solution inside and outside the barrel is not hindered, as a result, a high-quality plated product having a uniform thickness and no unplated portions can be obtained.
It is preferable that the cylindrical tube shaft position formed by the main body portion does not coincide with the center position of the end wall, and the main body portion rotates eccentrically around the center position of the end wall. As a result, the product to be plated housed in the main body has a higher agitation and leads to an increased opportunity for the product to be plated to come into contact with the plating solution. As a result, high quality plating with a uniform thickness and no unplated parts. Goods can be obtained.

It is preferable to form recesses in the peripheral wall constituting material so as to form a staggered arrangement on both side surfaces of the plate thickness. If it does in this way, in the stage which manufactures a surrounding wall constituent material (resin pouring method etc.), it will become what balanced the shrinkage strength of the both surfaces, and there is an advantage that warp and a crack do not easily occur at the time of hardening.
It is preferable to form all the peripheral wall components in the same shape. By doing so, since only one type of component is required, the manufacturing cost can be kept low, and the assembly to the barrel can be easily performed.

  The plating barrel according to the present invention can extend the life against wear caused by contact with the product to be plated, thereby reducing the running cost. In addition, the production cost can be kept low. Furthermore, it is highly versatile in terms of size to be plated.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a first embodiment of a plating barrel 1 according to the present invention. The barrel 1 has a main body 2 and end walls 3 provided at both ends of the main body 2, and the main body 2 is formed in a cylindrical shape with both ends open. The main body 2 is coupled to the main body 2 in a state where both ends of the main body 2 are closed.

In the present embodiment, the main body 2 is a square cylinder having a regular hexagonal shape with a hollow cross-sectional shape, and one surface (a surface that follows one side of the regular hexagon) is removed from the main body 2 in this state. A passage 5 is provided.
Through this work port 5, the product to be plated can be stored or taken out into a cavity formed in the inside of the main body 2 (a range surrounded by the end walls 3). During the plating process, a resin lid (not shown) is attached to the work opening 5 so that the product to be plated stored in the main body 2 is not dropped.

  The end wall 3 is formed in a disk shape. As apparent from FIG. 3, in the rectangular tube shape formed by the main body portion 2, the cylindrical shaft position Q and the center position P of the disk shape formed by the end wall 3 do not coincide with each other. The workpiece opening 5 is eccentric in a direction away from the outer peripheral contour of the end wall 3. Thereby, the space which attaches a lid | cover to the workpiece | work opening 5 of the main-body part 2 is ensured.

  A rotation shaft (not shown) is connected to the end wall 3 toward both outer sides, and this rotation shaft is positioned at the center position P of the end wall 3. Therefore, the end wall 3 rotates concentrically while the barrel 1 rotates, whereas the main body 2 rotates eccentrically. As a result, the product to be plated housed in the main body 2 has a higher agitation and leads to an increased opportunity for the product to be plated to come into contact with the plating solution. As a result, a good quality with a uniform thickness and no unplated parts. Plating products can be obtained.

In addition, the main-body part 2 and the end wall 3 do not necessarily need to be eccentric, and may couple | bond together as coaxial arrangement | positioning.
The main body 2 is formed by a plurality of peripheral wall constituent members 10. All the peripheral wall constituting members 10 have the same shape, and have a shape (hollow regular hexagon) in which the main body portion 2 is cut into a thin plate shape perpendicular to the rotation axis (the center position P of the end wall 3 described above). It is said that. The peripheral wall constituting material 10 is made of resin, and in particular, PVC, PP, acrylic and the like are preferably used in order to prevent the plating liquid from being plated and resistant.

The dimension of the peripheral wall constituting material 10 is not particularly limited, and may be adjusted to the plating processing efficiency and the volume of the plating tank, but the dimension W along the diameter method of the end wall 3 (see FIG. 4). In this embodiment, W = 12 mm and t = 6 mm, respectively, with respect to the thickness t (see FIG. 5) of the peripheral wall constituting material 10 itself.
In the peripheral wall constituting material 10, if the W dimension is increased, the life of the peripheral wall constituting material 10 can be extended against wear due to contact with the product to be plated.

  As shown in FIG. 5, each peripheral wall constituting member 10 is formed with recesses 11 that are recessed in the plate thickness direction so as to be staggered on both sides of the plate thickness. The opening shape of the recess 11 is a rectangle whose rotation direction (opening width b) is longer than the rotation axis direction (depth d) of the main body 2. Specifically, the depth d of the recess 11 was 2.5 mm, and the opening width b was 10 mm. In addition, although the opening shape of the recessed part 11 is made into the rectangle in the example of a figure, it is good also as a long round shape or an ellipse.

The main body 2 is formed by directly superimposing a plurality of the peripheral wall constituting material 10 having such a shape along the rotation axis (the center position P of the end wall 3 described above). What is necessary is just to match | combine the number of superposition | polymerization (use number) of the surrounding wall structural material 10 with a plating process efficiency and the volume of a plating tank.
In addition, as shown in FIG. 4, all the peripheral wall constituting members 10 have a total thickness of 11 locations including 6 locations corresponding to the regular hexagonal apex portions and 5 locations corresponding to the central portions of the side portions, respectively. Bolt through-holes 12 penetrating through are provided. The tie rods 13 (see FIG. 2) are passed through the bolt through holes 12 that are matched at the corresponding positions when all the peripheral wall constituent members 10 are brought into the superposed state.

  The tie rod 13 has a length substantially corresponding to the length in the axial direction of the main body 2, and female screw holes (not shown) are provided at both ends at a predetermined depth along the axial center. . The tie rod 13 is made of a resin, a metal rod provided with a resin coating or a resin cover, or an insert molding material in which a metal rod is used as a core material and a resin layer is coated around it. Is preferred.

  As shown in FIGS. 1 to 3, bolt holes 14 are also provided in the end wall 3 in the same arrangement as the peripheral wall constituting material 10. Then, with the end walls 3 attached to both sides of the main body 2, bolts 15 are inserted into the respective bolt through holes 14 from both outer sides of the end walls 3, and the bolts 15 are screwed into the respective ends of the tie rod 13. The main body 2 and the end wall 3 are connected. As described above, the barrel 1 according to the present invention is assembled only by the peripheral wall constituent material 10 and the end wall 3 except for connecting parts such as the tie rod 13 and the bolt 15.

As is clear from FIG. 5, when each peripheral wall constituent material 10 is brought into a polymerized state, the peripheral wall constituent materials 10 are in a direct polymerization relationship (surface contact state) in a portion where the concave portion 11 is not provided. In the portion where 11 is provided, a rectangular opening is secured inside thereof. The opening by the concave portion 11 becomes a water permeable hole for circulating a plating solution during plating. That is, the peripheral wall which forms the main-body part 2 is made into the structure with water permeability by this recessed part 11. As shown in FIG.

Each peripheral wall constituting material 10 can be manufactured with high efficiency and low cost by casting or the like. By appropriately setting the opening size and formation density of the recess 11 at this time, the number of water permeable holes generated in the main body 2, that is, the water permeability (opening ratio) of the barrel 1 can be changed.
As is clear from the above detailed description, in the barrel 1 according to the present invention, the peripheral wall constituent members 10 are directly polymerized so that separate members such as spacers are unnecessary, and the number of parts is reduced and assembled. Can be made easier and lower in cost. In addition, there is an advantage that the assembly strength is strong and the connection is not loosened due to rotational vibration or the like.

Further, the product to be plated can be prevented from being caught or dropped, and versatility for a small product to be plated can be obtained.
In order to use the barrel 1, the product to be plated and the chip-shaped power supply member are stored from the work opening 5 whose lid is opened with respect to the main body 2, and the main body 2 is closed after the lid is closed. Is partially immersed in the plating solution while rotating around the rotation axis (the center position P of the end wall 3 described above). In this state, plating is performed by applying between the anode provided in the plating tank and the power supply member in the barrel 1.

Note that an electrode may be provided in the main body 2 in place of the feeding member. When the plating process is finished, the barrel 1 is lifted from the plating tank, the lid that closes the work opening 5 of the main body 2 is opened, and the plated product is taken out.
As shown in FIG. 6, the main body 2 may have a cylindrical cross section. In addition, various cylindrical shapes including a square cylindrical shape may be used. In this case, it is preferable to provide a stirring protrusion 20 that protrudes from the inner peripheral surface of the main body 2 so that the product to be plated is actively stirred.

The recess 11 provided in the peripheral wall constituting material 10 may be provided only on one side of the plate thickness as shown in FIG. Moreover, as shown in FIG. 8, the adjacent space | interval of the recessed part 11 may be narrowed and the water permeability (opening rate) as the main-body part 2 may be improved.
By the way, this invention is not limited to each above-mentioned embodiment, It can change suitably according to embodiment.

  For example, the type of plating is not limited at all.

It is the perspective view which showed 1st Embodiment of the barrel which concerns on this invention. It is a front view corresponding to FIG. It is an AA arrow directional view of FIG. It is a BB line arrow directional view of FIG. It is the C section enlarged view of FIG. It is the side view which showed 2nd Embodiment of the barrel which concerns on this invention. It is the enlarged view which showed another embodiment of the recessed part provided in a surrounding wall structural material. It is the enlarged view which showed the recessed part used as another embodiment from FIG.

DESCRIPTION OF SYMBOLS 1 Barrel 2 Main-body part 3 End wall 10 Perimeter wall structural material 11 Recessed part

Claims (4)

A main body (2) having a cylindrical body with both ends open by a permeable peripheral wall and an end wall (3) provided with both ends of the main body (2) closed. 2) In a plating barrel that can be accommodated in a plating solution and is used while being partially immersed in a plating solution while rotating around a rotation axis set along the cylinder axis of the main body (2) ,
The main body part (2) is formed by connecting a plurality of peripheral wall constituent materials (10), such as a thin plate-like ring cut perpendicular to the rotation axis, while superposing them along the rotation axis. ,
Each peripheral wall component (10) is formed with a recess (11) that is recessed in the thickness direction in order to form a water-permeable hole with the peripheral wall component (10) in a polymerization relationship .
The opening shape of the recess (11) is characterized in that the rotation direction is longer than the rotation axis direction of the main body (2) in order to prevent film tension due to the surface tension of the plating solution. Barrel for plating. The cylindrical tube shaft position formed by the main body (2) and the center position of the end wall (3) are not coincident, and the main body (2) rotates eccentrically around the center position of the end wall (3). The plating barrel according to claim 1, wherein the plating barrel is configured as follows.   The barrel for plating according to claim 1 or 2, wherein the peripheral wall constituting material (10) is formed with recesses (11) so as to be staggered on both sides of the plate thickness.   The barrel for plating according to any one of claims 1 to 3, wherein all the peripheral wall constituting materials (10) are formed in the same shape.

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