JPS59123798A - Leadless barrel - Google Patents

Abstract

PURPOSE:To prevent the corrosion of a bearing part in contact with a shaft, etc. by the effect of a plating bath and the deterioration in the durability of a barrel type electroplating device by using the shaft of a rotary barrel in said device as an electricity conducting part to the cathode bar in the barrel, and using carbon in forming said bearing part. CONSTITUTION:A rotary barrel vessel 21 which electroplates many small sized objects to be plated are formed of a synthetic resin and is rotated by a metallic revolving shaft 22 rotated by a synthetic resin gear 25 whereby the small objects in the barrel 1 are rotated in a plating bath. Electricity is conducted to a cathode bar 24 attached on the inside surface of the barrel and the bar 24 is brought into contact with the small objects to conduct electricity to said objects thereby plating the surface thereof. The current for cathode supplied to the bar 24 is supplied via a metallic plate 23 coated with a synthetic resin coating 23', the shaft 22, a bearing 26 and a metallic bar 29. A carbon material which is chemically impervious is used for not only the bearing metal 27 of the bearing 26 in contact with the shaft 22 but also the bar 24 and in some case the shaft 22 whereby the corrosion of the device by the effect of the plating bath is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a barrel for electromechanical machining, which has a rotating shaft and is provided with a container into which a broken/)'t7+ object is charged.

In general, the barrel for electricity and neutrons is suspended on a rail, and the object to be plated is placed in a container that is rotatably attached below the barrel, and the object to be plated is passed through the electrolytic cell while rotating. By doing so, the object to be plucked is subjected to a violent attack.

And conventional electricity, Azu. The housing barrel is constructed as shown in Fig. 1, and is provided with a metal body 2 as a VrCr pole at the tip of an insulated lead wire 1, which is a cathode 4 gland, and the metal body 2 is attached to a rotating container B made of synthetic resin. It is located inside.

During plating, the object is rotated in the container and is energized by contact with the metal object 2.
y; 1,000 is done. Note that 4 is a nozzle that rotatably supports the container 3.

By the way, during plating, as the object to be plated rotates,
Since the metal body 2 at the tip of the lead wire may also rotate together with these members, the lead wire may be cut due to this twisting, and the contact portion between the cathode portion and the object may be 2. Since it was applied only to the peripheral surface of the metal body at a certain point, there were some cases in which the current was interrupted during plating, and there was a drawback that there were many variations in the thickness of the plate.

In order to eliminate these drawbacks, a rotating shaft 12 as a cathode conductor is provided in the container 11, one end of which is connected to a cathode metal bar 13 along the inner wall of the container, and the other end is energized via a bearing metal 14. A so-called leadless barrel without a lead record, as shown in FIG. 2, to be connected to the cathode bar 15 for use can be constructed.

However, even if metals and alloys with relatively good chemical resistance and conductivity are used as materials for the rotating shaft and bearing metal parts of these leadless barrels, friction of the rotating shaft in the plating solution It has been found that problems of poor rotation occur due to heat generation and deposition of plating. For this reason, leadless barrels made of such materials cannot withstand long-term use and are mechanically unsatisfactory.

The present invention has been made based on this background, and includes a contact conductive portion extending through the cathode conductor r inside the container, which has a rotating shaft and is loaded with a target object, on the outside of the container. established,
It is an object of the present invention to provide a leadless barrel which has mechanical durability by using a carbon material for the contact conductive part and which allows a plated product of good quality to be obtained.

The present invention will now be described in detail with reference to the accompanying drawings.

FIG. 3 is a schematic diagram of the right half of the first embodiment of the present invention, in which at least a carbon material is used in the bearing portion of the container having a rotating shaft.

Note that since it is bilaterally symmetrical, only the right half will be illustrated and explained.

In the figure, 21 is a barrel-shaped container made of synthetic resin and has a rotating shaft 22 made of metal.The lid (not shown) provided on the container 21 is fully opened and the object to be plated is inserted inside.

An energizing metal plate 23 connected to one end of the rotating shaft 22 is disposed on the inner surface of the container 21 including one end of the rotating shaft 22 . Further, the periphery of the current-carrying metal plate 26 is connected to a plurality of cathode conductors, such as cathode metal bars 24, arranged on the cylindrical inner surface of the container. Note that inside the current-carrying metal plate 23 and the rotating shaft 22, a synthetic resin wander 23'
It is covered with.

Reference numeral 25 denotes a gear made of synthetic resin that forms a layer on the outer surface of the container 21, into which the rotating shaft 22 with a V center is fitted, transmits the power from the sprocket to the container 21 through a gear connection (not shown), and rotates the container 21. It gives rotational force to.

26 is a bearing which holds the container 21i and comes into contact with the other end of the rotating It 1122, and a carbon material is used for the bearing metal 2 which is a p-contact conductive part.

Reference numeral 28 denotes a hanging tool for the container 21, such as a hanging fitting, and the bearing 2
The rotary shaft 22 is held through the shaft 6, and an energizing metal bar 29 is housed inside, and the energizing metal bar is connected to the bearing metal 27.

30, 3CI', and 6d' are insulating coatings.

Now, based on this configuration, the cathode tfN is connected to a pole rod (not shown) attached to the flange of the tank.
The conductive metal bar 29, the bearing metal 27, the rotating shaft 22, and the conductive metal plate 23 all pass through the cathode metal bar 2.
4.

Therefore, a carbon material is used for the bearing metal 27.
The other current-carrying metal bar 29, rotating shaft 22, current-carrying metal plate 23, and cathode metal bar 24VC are usually made of metals, alloys, or the like with low electrical resistance and good current conductivity.

Furthermore, since the energizing metal bar 29 is housed inside the hanging bracket 28, it is lined or masked with a coating 30.3σ of chemically resistant material such as rubber or plastic as described above, and the hanging bracket is Similarly, the outer periphery of the rotating shaft 22 in the interval between the rotating container 28 and the rotating container 21, the side surface of the container which is a cathode current-carrying part other than the cathode metal bar 24 that comes into contact with the object to be plated, the bolts for attaching the cathode metal bar, etc. are coated 6σ, 23. It shall be packed with lining and masking.

In addition, as a carbon material used as the bearing metal 27, particularly a polymeric carbon material is used in other ranges in terms of electrical conductivity.

Although it is inferior to alloys, etc., it has good airtightness and high hardness, so there is no heat generation due to friction in the rotating bearing part, so there is little wear, and it has extremely high chemical resistance, so it can be used easily during melting.
・There is no concern about VA precipitation, making it the most preferable metal for cathode conductive bearings in leadless barrels.

In addition, this polymeric carbon material may be used to line or mask all of the cathode current-carrying parts other than the cathode metal bar 24 that comes into contact with the earth object to be covered.

Furthermore, the use of polymeric carbon material is not limited to the bearing metal 27 in the cathode current-carrying path. If it is sufficiently durable, it can be used as the rotating shaft 22, and it can also be used as the cathode metal bar 24, taking advantage of the fact that there is no precipitation.

This also applies to the entire cathode energization group, and even with conventional carbon materials, the strength and IIJ are low.
Although it is inferior in abrasion resistance, it can be used in the same way.

FIG. 4 is a schematic diagram of the right half of the second embodiment of the present invention, in which at least a carbon material is used for the power-receiving contact body provided on the outer surface of the container having a rotating shaft and its current-carrying brush. be.

Note that since it is bilaterally symmetrical, only the right half will be illustrated and explained.

In the figure, reference numeral 61 denotes a target mechanism A having a rotating shaft 62.
A container for charging objects, 65 is a gear, 36 is a bearing, and 3
8Vi suspension and nine metal fittings, and seven of the gold wires forming the cathode passage section are the same as those of the first embodiment, so a description of the same structure will be omitted.

In the cathode conduction path which is a feature of this embodiment, 34 is a cathode conduction path ν disposed on the cylindrical inner surface of the container 31.
1, for example, a cathode metal bar, which contacts the subject's upper body and generates a negative current. One end thereof passes through the gear 35 and is connected to a ring-shaped power receiving contact 40 provided on the outer surface of the container 31 . The power receiving contact body 40 is connected to a current-carrying cathode bar 59 that passes through a hanging fitting 68, for example, a hanging fitting 68.
It is in contact with a current-carrying brush 41 provided at one end of the brush. This current-carrying brush 41 is provided on a hanging metal fitting 68, and sequentially contacts the power receiving contact body 40 formed in a ring shape on the outer surface of the container 61, and contacts the cathode metal bar 34 inside the container 31.
energize.

Such a power receiving contact body 40, a sniper brush 41, and a metal brush 7
Also contact 2゛9! The leadless barrel can be formed by the li-opening part, and the power receiving contact body 40 and the conductive bluff 41, which form the entire cathode conductive path, are made of at least a carbon material, and are connected to each other.
As explained in the first embodiment by using a nitric carbon fiber material /l
Excellent 1. ``The samurai is doing business.''

As explained above, the leadless barrel according to the invention has a rotating shaft, and a contact conductor is connected to the outside of the container into which the upper body is charged, leading to the internal cathode probe. By providing an abrasive part and using at least a carbon material for its contact thickness, the machine durability is improved, and the thickness of the product is uniform and increases, making it possible to produce products of the same quality. It is the daylight of productivity because it can be gained.

In addition, the rotating shaft of the container into which the broken object is charged is used as a cathode conductive piece, and the cathode conductive path is formed.4+11]
Since a carbon chestnut is used for the receiving plate, the excellent effects as in the above 6 can be obtained without providing a contact exclusive part in the tiller.

In addition, a contact conductor is provided on the outer surface of the container, which has a rotating shaft and in which the human body to be treated is placed, and is connected to the internal cathode, and a current-carrying brush that contacts the contact conductor is attached to the container hanger. established,
Since at least a carbon material is used for the contact conductive parts, it is easy to form a cathode conductive path flowing to the cathode metal bar inside the container, which results in less power loss and the above-mentioned excellent efficiency. Attended.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional electric barrel. FIG. 2 is a diagram illustrating a configuration example of a leadless barrel. The third tooth is a schematic configuration diagram of the right half showing the first embodiment of the present invention. FIG. 4 is a schematic diagram of the right half of the second embodiment of the present invention. 21, 31...Container 22.32...Rotating shaft 26...Electrifying metal & 24.54...Cathode metal bar 25.35/Gear 26.36...
Bearing 27...Bearing metal 28.38...Hanging metal fittings 29.39...Connection metal bar 40...Power receiving contact body 41゛Trace [2 people other than the brush for 1] Figure 1 Figure 2 Figure 4

Claims (3)

[Claims] (1) Provide a contact conductive part that communicates with the internal cathode conductor on the outside of the container that has a rotating shaft and into which the animal body is placed, and use at least a carbon material for the contact conductive part. Leadless barrel with all features. (2)m %1 ”+ *Claims characterized in that the rotating shaft of the container into which the object is charged is a cathode conductor, and at least a carbon material is used for the bearing metal forming the cathode conduction path. The leadless barrel described in paragraph (1). (3) Provide a power receiving contact body that has a rotating shaft and communicates with the cathode conductor inside the outer surface VC1 of the container into which the object to be plated is charged,
The leadless barrel according to claim 1, characterized in that a current-carrying brush that contacts the container hanger is provided, and at least a carbon material is used for the contact conductive portion thereof.