JPH0735600B2 - Degreasing container for plating and degreasing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a degreasing container and a degreasing device for a material to be plated, which is performed as a pretreatment for a plating process.

[0002]

2. Description of the Related Art When a metal product is subjected to various plating treatments, a degreasing treatment for removing oil, dust and the like adhering to the surface of the material to be plated is carried out as a pretreatment for the plating by mechanical processing such as pressing. Be seen. As the material to be plated, for example, in the case of a long material serving as a base material used for electrical contacts or a large product, degreasing treatment can be performed for each product. However, extremely small parts such as punched and formed electrical contacts cannot be degreased individually.

When degreasing such small parts,
Conventionally, a large number of small parts are put in a barrel-shaped container called a barrel processing method, and the whole container is put in a degreasing liquid tank to perform degreasing work.

[0004]

However, since the container containing the small parts has a weight of 20 to 30 kg as a whole, it is very heavy labor to carry out the degreasing process by holding the container by hand, which is economically efficient. Was bad. In addition, productivity was poor because the steps were discontinuous.

The small parts had oil adhered to them when the metal plate was punched out by a press, and dust adhered to the surface of the oil when they were stored. In order to perform the degreasing treatment, degreasing was performed using an organic solvent such as CFC, but such a solvent cannot be used due to the problem of environmental damage.

An alkaline degreasing liquid is used in place of an organic solvent such as CFC, but in this case, oil and dust after degreasing are floating in a film form on the surface of the degreasing liquid. For this reason, when the container is pulled out from the liquid tank after the degreasing treatment, film-like oil, dust, and the like are often attached to the surface of the component, and the degreasing treatment is often in vain.

In order to prevent this, the degreasing liquid is mixed with an alkaline surfactant to make it an emulsified state, and the degreased oil is collected by the surfactant so as to eliminate the formation of an oil film on the surface of the degreasing liquid. I was doing. However, since the oil itself floats in the degreasing liquid, it was not possible to completely prevent the oil from coming into contact with the parts and adhering to the parts when the container was pulled up. Further, a large amount of cost is required to emulsify the degreasing liquid.

In view of the above-mentioned problems of the prior art, the present invention is for a plating process capable of continuously and automatically performing a degreasing process which is performed as a pre-plating process for a small component such as an electrical contact punched into a single body. A degreasing container is provided. Further, during the degreasing process, hydrogen gas is generated, and the oil is peeled off from the surface of the component due to the gas generation.The present invention guides the hydrogen gas and the oil to the degreasing liquid surface, and the gas is released into the atmosphere. However, the oil provides a degreasing device for the plating process so that the oil can be collected on the liquid surface.

[0009]

In order to achieve the above object, the present invention provides a polygonal cylindrical body 4 having one end serving as a component inlet 2 and the other end serving as a degreased component outlet 3. Is partitioned by a spiral partition plate 5, and a plurality of electrodes 6 are equally arranged in the spiral direction in the cylindrical body 4 between the partition plates 5 and correspond to the annular conductors 7 arranged on the outer periphery of the cylindrical body 4. An electrode 11 having a flow guide surface 12 that is semi-circularly curved and does not have a counter electrode to the electrode 6 and is connected to the electrode 6 to be energized so as to be electrically conductive.
Are independently installed, and the tubular body 4 is rotatable in the circumferential direction.

The inside of a polygonal cylindrical body 4 having one end as a component inlet 2 and the other end as a degreased component outlet 3 is partitioned by a spiral partition plate 5, and a cylindrical body is provided between the partition plates 5. A plurality of electrodes 6 are evenly arranged in the spiral direction, and a plurality of annular conductors 7 arranged on the outer periphery of the tubular body 4 are electrically connected to the corresponding electrodes 6 to form a partition plate 5. An electrode 11 having a counter electrode opposite to the electrode 6 and having a semicircularly curved flow guide surface 12 is independently installed in the upper part of the cylindrical hollow portion 10, and the tubular body 4 is degreased so as to be rotatable in the circumferential direction. The container is rotatably installed in the degreasing liquid tank 23.

The tubular body 4 has a rotating member 13 composed of a gear 15 fixed to the outer peripheral surfaces of both ends and a pinion 16 meshing with the gear 15, and a guide roller 19 fixed to the outer peripheral surface of the tubular body 4 close to the gear 15. And supporting roller 2 that fits in this
It can rotate in the circumferential direction together with the support member 14 made of zero.

In the electrode 11, a flow pipe 30 is provided upright in a flow hole 29 formed near the upper end, and a cylindrical shield 33 is installed in the flow pipe 30 having an outflow hole 31 on the upper peripheral surface. There is.

The degreasing container 1 is rotatably installed in a rectangular support frame 27, and the support frame 27 can be set in the degreasing liquid tank 23.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 and 2 show the body of a degreasing container used in a degreasing device performed as a pretreatment for a plating process. The container body 1 has a small size such as an electrical contact formed at one end as a single material to be plated. The base is a polygonal cylindrical body 4 made of synthetic resin, which is used as a component inlet 2 and has the other end opened as a degreased component outlet 3.

The cylindrical body 4 has a length of 1 to 3 m and an inner diameter of about 30 to 40 cm, but the size can be arbitrarily selected. Further, in the drawing, the tubular body 4 is a hexagon, but it is not limited to this and may be a pentagon, a heptagon, or the like, and the shape of the polygon can be arbitrarily selected.

The inside of the tubular body 4 is partitioned by a partition plate 5 made of synthetic resin, which is continuously formed in a spiral shape from the input port 2 toward the discharge port 3, and between the partition plates 5 the tubular body 4 has a tubular shape. A plurality of electrodes 6 which can be energized inside and outside are spirally arranged by being fitted and fixed in the body 4. Also, on the outer periphery of the tubular body 4,
A plurality of annular conductors 7 arranged along the length direction of the tubular body 4 are wound and fixed, and each conductor 7 and the electrode 6 at a position corresponding thereto are electrically connected. deep.

Each electrode 6 is connected to an external power source through a conductor 7. For this reason, for example, a conductive roller 8 is rotatably pressed by a support 9 to each conductor 7 so that each roller can rotate. 8 is capable of energizing each conductor 7 and electrode 6 if connected to an external power source using a conductive wire (not shown) that passes through the inside of the support 9.

The energization of each roller 8 is performed sequentially from the roller 8 on the inlet 2 side to the roller 8 on the outlet 3 side by using a timer (not shown). Although each roller 8 is individually supported, all the rollers 8 may be fixed to one rotation shaft so that each roller 8 can be separately energized via a timer.

Electrodes 11 are separately arranged above the cylindrical hollow portion 10 formed by the partition plate 5 in the longitudinal direction. As shown in FIG. 3, this electrode 11 has a shape in which a long conductive metal plate is curved downward along the length direction, and the lower surface serves as a flow guide surface 12, so that an external power source can be energized. It is connected. The electrode 6 and the electrode 11 are opposite electrodes of the electrode 6 (-) and the electrode 11 (+).

A certain amount of small parts are put into the container body 1 all at once through the inlet 2, and move in the direction of the outlet 3 along the spiral surface of the partition plate 5. The container body 1 is rotatable in the circumferential direction for the movement of the small component group. As described above, the small component group is charged into the container body 1 through the charging port 2, the degreased component group is discharged through the discharging port 3, and the electrode 11 is independently present in the tubular body 4. However, since it is connected to an external power source, it is desirable to rotate the outer peripheral body of the tubular body 4.

FIGS. 4, 5, and 6 show an example of the rotation support mechanism of the container body 1. This rotation support mechanism includes a pair of rotating members 1 for rotating the container body 1 in the circumferential direction.
3 and a pair of support members 14 that support the peripheral surface of the container body 1 on the lower surface.

The rotary member 13 is composed of a gear 15 wound around and fixed to the outer circumference of both ends of the tubular body 4, and a pinion 16 meshing with the gear 15, and the pinion 16 is the rotary shaft 1.
It is rotatably supported by 7. Reference numeral 18 is a column of the rotating shaft 17 having a bearing at the upper end. Rotating shaft 17
Is rotatably connected to a motor (not shown).

Further, the support member 14 is an annular guide rail 19 fixed to the outer periphery of the tubular body 4 in the vicinity of the gear 15.
And a pair of supporting rollers 20 arranged in the circumferential direction of the lower surface of the tubular body 4.
Supported by bearings.

The rotation supporting mechanism has the above-mentioned structure, and the weight of the container body 1 is adjusted by the roller 2 fitted on the guide rail 19.
Supported by 0. When the pinion 16 is driven in this state, the gear 15 rotates, and the container body 1 rotates in the circumferential direction in the hollow portion. The container body 1 is stably rotated by the guide rail 19 and the roller 20 without being displaced in the longitudinal direction.

FIG. 7 shows another example of the support member 14. Instead of the pair of rollers 20, a circular bearing support 22 may be fitted under the guide rail 19 to support the support 22. Can support the weight and rotation of the container body 1.

The rotation support mechanism described above is merely an example, and the structure is not limited to this structure. Any other structure can be used as long as it supports the container body 1 and can rotate in the circumferential direction. Is something that can be done.

Next, a degreasing process for a small part such as an electrical contact which is a material to be plated by the degreasing device using the container body 1 will be described. As shown in FIG.
The container body 1 is installed in a treatment liquid tank 23 filled with a degreasing liquid such as an alkaline degreasing agent so that the inlet 2 is on the lower side and the outlet 3 is on the upper side. Although not shown in the drawings, the container body 1 is supported by the rotation support mechanism so as to be rotatable in the circumferential direction.

Therefore, the columns 18 of the rotating member 13, the columns 21 of the supporting member 14 and the like are erected and fixed on the bottom plate of the liquid tank 23, the gear 15 and the pyeon 16 mesh with each other, and the guide roller 19 and the supporting roller 20. Are in a fitted state. Further, the rotary shaft 17 may be connected to a watertight motor in the liquid tank 23, or the rotary shaft 17 may be tightly penetrated from the liquid tank 23 to the outside and connected to the motor.

The small component group 24 formed as a single unit includes a component storage hopper 25 arranged outside the liquid tank 23 and a guide pipe 26.
Through the charging port 2, the necessary amounts are collectively charged into the container body 1. When the container body 4 is rotated in the circumferential direction by the rotation support mechanism after the component group 24 is thus put in, the component group 24 is spirally divided along the bottom surface side of the tubular body 4 by its own weight. Will move upwards in sequence.

At the same time when the component group 24 is put in, both electrodes 6,
When a direct current is applied to 11, the (−) side electrode 6 and the (+) side
An electric current flows between the side electrodes 11, the electrolysis reaction of the liquid proceeds on the surface of the component group 24, and hydrogen gas is generated from the surface of each component. Since the hydrogen gas breaks the oil film surface formed on the surface of each component and floats in the degreasing liquid, the oil film on the surface of the component is peeled off and floats in the degreasing liquid. The oil floating on the liquid surface is constantly removed by a recovery operation.

The oil on the surface of each component forming the component group 24 is
Since it is removed by the degreasing liquid and is peeled off when hydrogen gas is generated, each component moves toward the discharge port 3 while degreasing is performed, and the degreased component can be taken out from the discharge port 3. The degreased parts taken out from the discharge port 3 may be dropped into a receiving container (not shown) installed in the liquid tank 23, and the receiving container may be taken out of the liquid tank 23 when they are accumulated to some extent.

The oil and hydrogen gas separated from each component as described above rise while floating because they have a lower specific gravity than the degreasing liquid, but the electrode 1 installed above in the container body 1
Since 1 is curved in a semicircular shape and is inclined similarly to the container body 1, oil and hydrogen gas are captured by the flow guide surface 12 of the electrode 11. The oil and hydrogen gas thus captured rise along the inclined guide surface 12 toward the discharge port 3,
Moving.

The oil discharged from the container body 1 into the liquid tank 23 floats on the liquid surface and is collected and removed. Also,
Hydrogen gas is spontaneously released into the atmosphere and does not stay in the degreasing liquid. A small amount of oil, hydrogen gas, etc. leaking from the flow guide surface 12 of the electrode 11 floats above the electrode 11 in the container body 1, but since the container body 1 is inclined and rotated, the upper partition plate 5 Since it is gradually moved in the upward direction and discharged from the discharge port 3 in the same manner as described above, it does not stay in the container body 1.

If the rotation speed (rotation speed) of the container body 1 can be set to an arbitrary value, the rotation speed and the degreasing time can be changed depending on the amount of oil adhering to the parts. When the amount of oil adhered is small, the rotation speed can be increased and the degreasing time can be shortened. Conversely, when the amount of oil adhered is large, the rotation speed can be slowed down and the degreasing time can be lengthened.

Since each electrode 6 can be individually energized and the energization of each electrode 6 is controlled by a timer, when the component group 24 is moved upward by the partition plate 5, the electrode 6 in the moving position is moved. By energizing only one of the electrodes, the electrode 6 at that position can be adjusted according to the moving speed of the component group 24.
Can be energized to. Since the DC current for power supply uses the voltage regulation circuit power source, almost no electrolytic current flows from the electrode 6 on the upper part of the container body 1 which is not in contact with the component group 24.

The electrodes 6 are arranged between the partition plates 5,
Since the entire container body 1 is inclined, the component group 24 moves upward in the inclination so that it is pushed up at a position close to the partition plate 5. Therefore, the electrodes 6 between the partition plates 5 are
If it is installed at a position close to the lower partition plate 5, the contact position between the component group 24 and the electrode 6 will be extremely close, and it will be possible to favorably conduct electricity and electrolyze.

The above degreasing device is a case in which the container body 1 is directly attached to the degreasing liquid tank 23, but the invention is not limited to this. The container body 1 is installed in the support frame body, and the support frame body is installed. You may make it install in the liquid tank 23. FIG. 9 shows a state in which the container body 1 is installed in the support frame 26. The support frame 27 is formed by assembling a mold material into a rectangular shape, and the inside of the support frame 27 has the same structure as the container body 1 described above.
Is rotatably installed in the circumferential direction, and the whole is set in the liquid tank 23 as shown in FIG.

When the whole is set in the liquid tank 23, in order to make the container body 1 in an inclined state, the container body 1 is previously installed in an inclined state in the support frame support frame 27, or in the support frame 27. The container body 1 may be installed in a parallel state, and as shown in FIG. 10, the support leg 28 may be fixed to one lower end of the support frame 27 and the entire support frame 27 may be inclined. The degreasing process when the container body 1 is installed in the support frame 27 and the whole body is set in the liquid tank 23 is exactly the same as in the above-described embodiment.

FIG. 11 shows another embodiment of the electrode 11, and the same parts as those in the above-mentioned embodiment are designated by the same reference numerals. In this embodiment, a flow hole 29 is formed at a position near the upper end of the electrode 11 which is curved and has the flow guide surface 12, and a flow pipe 30 is vertically installed and fixed above the flow hole 29. A plurality of vertically elongated outflow holes 31 are formed in the upper end of the distribution pipe 30 in the circumferential direction, and the distribution pipe 30 is surrounded by the plurality of connecting rods 32 to form a large-diameter tubular shape. A shield 33 is installed.

Since the electrode 11 of the present embodiment has the above-described structure, the oil and hydrogen gas that has been degreased as described above and separated from the component group 24 and floating is the guide surface 12 of the electrode 11 as described above. Are collected by the ascendant, rise along the inclined surface, and rise from the circulation hole 29 through the circulation pipe 30. Hydrogen gas is released into the atmosphere as it is, and oil is released from the outflow hole 31 to the degreasing liquid surface in the shield 33. Since the oil collects in the shield 33, the oil in this portion may be collected and removed.

[0041]

As described above, according to the present invention described above, the container body 1 has the inside of the polygonal cylindrical body 4 having one end as the component inlet 2 and the other end as the degreased component outlet 3. Partitioned by a spiral partition plate 5, a plurality of electrodes 6 are provided in the tubular body 4 between the partition plates 5 in the spiral direction, and a plurality of annular conductors 7 are provided on the outer periphery of the tubular body 4 and corresponding thereto. Since the electrode 6 is connected and the electrode 11 opposite to the electrode 6 is independently installed in the upper portion of the tubular body 4, a required amount of the component group 24 is loaded from the loading port 2 to allow the tubular body 4 to be charged. The component group 24 can be moved in the direction of the discharge port 3 by the spiral partition plate 5 by rotating the.

The container body 1 is installed in the liquid tank 23 filled with the degreasing liquid in an inclined state so that the discharge port 3 side is located above,
When a direct current is applied to both electrodes 6 and 11 while rotating the container body 1 in the circumferential direction, the oil adhering to the surface of the component group 24 is removed by the degreasing liquid and the component group 24 is electrolyzed. Hydrogen gas is generated, and the oil film on each part is peeled off when the gas is generated, so the oil on the surface of the part is completely peeled off.

Although the hydrogen gas and the separated oil rise in a floating state, since the electrode 11 having the curved flow guide surface 12 is installed in the upper part of the container body 1, the hydrogen gas and oil are guided by the guide surface. It goes up in the inclination direction through 12 and is discharged from the discharge port 3 into the degreasing liquid. Hydrogen gas rises as it is in the degreasing liquid and is released into the atmosphere. Also, the oil floats on the liquid surface and is collected and removed.

Since the tubular body 4 has a polygonal shape, if the tubular body 4 is rotated in the circumferential direction while the component group 24 is placed inside, the component group 24 is inverted and agitated at the inner surface corners. Therefore, the contact between each part and the degreasing liquid is good, and the electrolysis is performed on the surfaces of all parts to generate hydrogen gas.
It is possible to completely remove the oil adhering to the surface of each component.

The electric conductors 7 are energized through the rollers 8 which are pressed against each other. The energization is conducted from the electric conductor 7 on the inlet 2 side to the electric conductor 7 on the outlet 3 side by using a timer. Therefore, it is sufficient to energize the electrode 6 where the component group 24 is located in the container body 1, and the power supply state can be moved according to the movement of the component group 24.
Since it does not need to be energized, it saves electricity consumption and is economical.

If the container body 1 is rotatably installed in a rectangular support frame 27 and the support frame 27 can be set in the liquid tank 23, the container body 1 can be easily replaced. . For example, when it is necessary to change the size of the container body 1 according to the size of the component group 24 or the amount of degreasing, the support frame 27 is removed from the liquid tank 23, and the support frame 27 having another container body 1 is removed. It may be set in the tank 23. Also,
Since the container body 1 can be replaced, maintenance and inspection of the container body 1 can be easily performed.

A flow pipe 30 is erected and fixed in a flow hole 29 formed in the upper part of the electrode 11, and a plurality of flow holes 31 are formed on the upper end peripheral surface of the flow pipe 30 so as to surround the flow hole 31. The distribution pipe 30 has a cylindrical shield 3
Since 3 is installed, the hydrogen gas and oil captured by the curved guide surface 12 of the electrode 11 rises through the flow hole 29 and the flow pipe 30, so that the hydrogen gas is released into the atmosphere. Further, the oil does not float on the liquid surface inside the shield 33 and flows out to other liquid surfaces, the oil can be easily collected and the liquid surface outside the shield 33 is not contaminated with the oil.

[Brief description of drawings]

FIG. 1 is a front view showing a cross section of a part of a degreasing container used in the degreasing treatment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view of an electrode.

FIG. 4 is a front view of a main part of a container body that is rotatable in the circumferential direction.

FIG. 5 is a side view showing a relationship between a tubular body and a rotating member.

FIG. 6 is a side view showing a relationship between a tubular body and a support member.

FIG. 7 is a side view showing another embodiment of the support member.

FIG. 8 is a cross-sectional view showing a state in which a degreasing container is installed in a degreasing liquid tank.

FIG. 9 is a perspective view showing a state where the container body is installed on the support frame.

FIG. 10 is a cross-sectional view showing a state in which a support frame having a container body is set in a degreasing liquid tank.

FIG. 11 is a sectional view showing another embodiment of the electrode.

[Explanation of symbols]

 1 Container Main Body 2 Input Port 3 Discharge Port 4 Cylindrical Body 5 Partition Plate 6 Electrode 7 Conductor 8 Roller 9 Support 10 Hollow Part 11 Electrode 12 Flow Guide Surface 13 Rotating Member 14 Supporting Member 15 Gear 16 Pinion 17 Rotating Shaft 18 Strut 19 Guide Rails 20 Support Rollers 21 Supports 22 Supports 23 Degreasing Liquid Tank 24 Parts Group 25 Hoppers 26 Guide Tubes 27 Support Frames 28 Support Legs 29 Distribution Holes 30 Distribution Pipes 31 Outflow Holes 32 Connection Rods 33 Shields

Claims (5)

[Claims] 1. A spiral partition plate 5 partitions the inside of a polygonal cylindrical body 4 having one end as a component inlet 2 and the other end as a degreased component outlet 3, and a cylinder between the partition plates 5. A plurality of electrodes 6 are equally arranged in the spiral direction in the spiral body 4, and a plurality of annular conductors 7 arranged on the outer periphery of the cylindrical body 4 are electrically connected to the corresponding electrodes 6, and are formed by a partition plate 5. An electrode 11 having a flow guide surface 12 curved in a semicircular shape which is a counter electrode to the electrode 6 and is provided above the cylindrical hollow portion 10 to be formed.
Is independently installed, and the cylindrical body 4 is rotatable in the circumferential direction. 2. A polygonal tubular body 4 having one end as a component inlet 2 and the other end as a degreased component outlet 3 is partitioned by a spiral partition plate 5, and a cylinder is provided between the partition plates 5. A plurality of electrodes 6 are equally arranged in the spiral direction in the spiral body 4, and a plurality of annular conductors 7 arranged on the outer periphery of the cylindrical body 4 are electrically connected to the corresponding electrodes 6, and are formed by a partition plate 5. An electrode 11 having a flow guide surface 12 curved in a semicircular shape which is a counter electrode to the electrode 6 and is provided above the cylindrical hollow portion 10 to be formed.
The degreasing device for plating treatment is characterized in that a degreasing container in which the cylindrical body 4 is rotatable in the circumferential direction is rotatably installed in the degreasing liquid tank 23. 3. The tubular body 4 comprises a rotating member 13 comprising a gear 15 fixed to the outer peripheral surfaces of both ends and a pinion 16 meshing with the gear 15, and a guide fixed to the outer peripheral surface of the tubular body 4 close to the gear 15. The degreasing container for plating treatment and the degreasing apparatus according to claim 1, wherein the roller 19 and the supporting member 14 formed of a supporting roller 20 fitted to the roller 19 are rotatable in the circumferential direction. 4. The electrode 11 has a circulation pipe 30 provided upright in a circulation hole 29 formed at a position close to the upper end portion, and a cylindrical shield 33 in the circulation pipe 30 having an outflow hole 31 on the upper peripheral surface.
The degreasing container for plating treatment and the degreasing device according to claim 1, 2 or 3, wherein 5. A degreasing device for plating treatment, wherein the degreasing container 1 is rotatably installed in a rectangular support frame 27, and the support frame 27 is set in a degreasing liquid tank 23.