JP2000273667A - Apparatus for pickling metallic ball - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for pickling metallic balls in which oxide film developed on the surface of the metallic balls by hot-rolling is removed with great certainty and in which a cleaning process for realizing the improvement of product quality and the load reduction of drainage water treating work is also included. SOLUTION: A screw conveyor 3 having a liquid discharging hole at the inlet part and an acid supplying hole and an acid discharge hole at the intermediate part is arranged at the end part of an inclining pipe 2 composed of a main pipe 2a for continuously receiving and dropping red-heated metallic balls 8 and a branch pipe 2b for injecting an acid solution against the metallic balls. In the cleaning process, a trommel device 7 and a carrying conveyor 11 with a plurality of nozzles 10a-10h are independently disposed in each section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention aims to remove an oxide film formed on the surface of a hot-formed metal ball and to remove an acid solution adhered to the surface of the metal ball after pickling. To a continuous pickling apparatus.

[0002]

2. Description of the Related Art Japanese Utility Model Registration No. 3039072 is an example of a conventional technique for pickling a metal ball, particularly a copper ball for plating. This technology provides an inclined pipe consisting of a main pipe for continuously receiving and tumbling red-hot metal balls and a branch pipe for injecting an acid solution onto the metal balls between a hot forming apparatus and a screw conveyor, and providing the inclined pipe. In the pipe and screw conveyor, peeling of the oxide film is performed using the temperature difference between the glowed metal ball of about 700 to 800 ° C and the acid solution of about 30 ° C, and the difference in the shrinkage of copper and copper oxide. It is a content to try.

[0003] Next, the prior art of the washing step after pickling will be described. For acid solution washing after pickling, a chain conveyor is provided from the screw conveyor outlet described above until the three-stage washing process of primary water washing, secondary water washing, and hot water washing is completed. The transported metal balls are washed on the conveyor while being washed by washing water sprayed by nozzles provided above each washing step. In addition, each washing step has a water tank separated therefrom by the washing step, and the washing water jetted by the nozzle is collected. The collected washing water is transferred from the hot water tank to the secondary water tank, the secondary water tank, and the like. The water is cascaded from the water storage tank to the primary water storage tank, and the water is discharged from the primary water storage tank through a neutralization process.

[0004]

However, the above-mentioned metal ball pickling apparatus has the following problems to be solved. When a red-hot metal ball and an acid solution are passed through an inclined pipe, the temperature of the acid solution in a portion that comes into contact with the metal ball naturally rises rapidly due to rapid heat exchange between the metal ball and the acid solution that falls at a high speed. . In addition, in the above-described conventional technology, the acid solution is not renewed until the metal balls reach the outlet of the screw conveyor. For example, when the production pitch of the metal balls by the hot forming apparatus is not uniform, the metal balls are densely packed. The cooled acid solution is not sufficiently supplied to a specific metal sphere surrounded by a plurality of metal spheres transported by It was sometimes carried out.

Next, regarding the washing step after pickling,
With only the water pressure of the nozzle cleaning water, the force exerted on the removal of the acid solution adhering to the surface is small, and since it is sprayed from one direction, the cleaning of the anti-spray surface is incomplete and the acid solution removal is uneven. However, problems such as premature discoloration due to local or overall rusting have occurred. In addition, a large amount of the acid solution discharged from the screw conveyor together with the metal balls and attached to the chain conveyor was taken out to the washing process, so that the acid concentration of the wastewater discharged from the primary water storage tank was increased, and the acid concentration was enormous for neutralization. Labor and expense.

The present invention has been made in view of such circumstances, and it is possible to improve product quality by reliably removing an oxide film and to enhance an acid solution cleaning step, and to reduce the load on wastewater treatment work. It is an object of the present invention to provide a pickling apparatus for a metal ball, which can also realize the above.

[0007]

According to the present invention, there is provided a semiconductor device comprising:
The metal ball pickling apparatus described above glows red at the inlet at the end of an inclined pipe consisting of a main pipe for continuously receiving and rolling down a red-hot metal ball and a branch pipe for injecting an acid solution into the metal ball. A plurality of perforations for removing the acid solution whose temperature has increased due to contact with metal balls, and a plurality of acid supply ports capable of supplying a new acid solution cooled in the middle part, and used for pickling A screw conveyor having a plurality of discharge ports capable of discharging the acid solution whose temperature has risen is provided.

According to a second aspect of the present invention, in the cleaning step for removing the acid solution adhered to the surface of the metal ball after the pickling, the surface is polished while transporting the metal ball by a trommel device. Plural or singular washing process with multiple or single washing process for washing with water and nozzles capable of spraying washing water from multiple directions, and washing the surface while transporting metal balls on a conveyor that can be transported horizontally or diagonally And the process. The pickling apparatus for a metal ball according to claim 3 is a cleaning step for removing an acid solution attached to the surface of the metal ball after the pickling,
A plurality of transporting means and a plurality of cleaning means are independently arranged for each section.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will now be described with reference to the accompanying drawings to provide a better understanding of the present description. First, the overall configuration will be described with reference to FIG. As shown in the figure, a main pipe 2a installed at a certain inclination angle so as to continuously receive and fall down a glowing metal ball B at an outlet of the hot forming apparatus 1, and a middle abdomen of the main pipe 2a. An inclined pipe 2 formed from a branch pipe 2b capable of supplying an acid solution A to the metal sphere B is connected, and a screw conveyor 3 is arranged at an end of the inclined pipe 2;
An acid stripping conveyor 4 and an acid solution storage tank 5 having a grid-like or mesh-like conveying surface are provided below the screw conveyor 3.

A chute 6a is located on the side of the pickling conveyor 4.
A trommel device 7 is arranged via a water tank 8a at a lower portion of the device with an interval from the acid solution storage tank 5, and the washing water stored in the water tank is circulated by a circulation pump 9. , And can be supplied into the trommel device 7. Further, a plurality of trommel devices 7 and water storage tanks 8a may be arranged. A transfer conveyor 11 having a plurality of nozzles 10a to 10h capable of spraying washing water onto a transfer surface via a chute 6b connected to an outlet of the trommel device 7, and a water storage tank 8b below the conveyor. It is arranged at an interval from the water storage tank 8a. Further, a plurality of the conveyors 11 having the plurality of nozzles 10a to 10h and the plurality of water storage tanks 8b may be arranged.

Next, the structure of the screw conveyor 3 will be described with reference to FIG. The screw conveyor 3 has a casing 12 having a metal ball B and an acid solution A carry-in port 13 at one upper end and a metal ball B and an acid solution A carry-out port 14 at the lower end of the other end. It is constituted by a screw shaft 15 having a fulcrum at an end and capable of rotating continuously. At the inlet of the casing 12, a plurality of liquid outlets 16a to 16d,
In the middle part, a plurality of acid supply ports 17a to 17c and a discharge port 18 are provided.
a to 18c are provided.

Next, an operation example of the present invention will be described with reference to FIGS. The red-heated metal sphere B hot-formed by the hot-forming apparatus 1 is continuously charged into the main pipe 2a of the inclined pipe 2 installed at an inclined angle, and
The cooled acid solution A is supplied from the branch pipe 2b that joins the middle abdomen of a, and the metal sphere B falls down while rolling along with the acid solution A in the main pipe 2a to reach the screw conveyor 3. When removing the oxide film of the red-heated metal ball B, for example, in the case of pickling copper balls for plating, dilute sulfuric acid cooled to 30 to 40 ° C. is used for a red-hot copper ball of 700 to 800 ° C. Known techniques include stripping an oxide film using a difference in shrinkage between copper oxide and pure copper, and removing an oxide film from a copper ball by a chemical cleaning effect. (Utility model registration No. 303907
No. 2)

When the metal balls B and the acid solution A are carried into the screw conveyor 3 from the carry-in port 13, the main pipe 2 of the inclined pipe 2
Acid solution A heated in the above pickling process in a
Immediately flows out of the liquid outlets 16a to 16d and the acid solution storage tank 5
And only the metal ball B is transported to the intermediate portion of the casing 12 by the continuous rotation of the screw shaft 15. In the middle part of the casing 12, first, the supply port 17a
The acid solution A which has been cooled is newly supplied, and the acid solution A whose temperature has risen due to the pickling action is discharged from the acid discharging port 18a to the acid solution storage tank 5, and as the metal balls B are conveyed, 17b
Supplied from 18b and discharged from 16c, 18
The supply and the discharge are repeated from the position c, and the metal ball B is conveyed to the carry-out port 14 while the acid solution A is updated as needed.

When the metal balls B and the acid solution A are carried out from the carry-out port 14 of the screw conveyor 3 onto the acid cutting conveyor 4,
The acid solution A passes through the grid-like or mesh-like transport surface of the acid-pulling conveyor 4 and flows into and is stored in the acid-liquid storage tank 5 disposed below the conveyor. It remains on the transport surface and is transported to the trommel device 7 via the chute 6a by the transport operation of the conveyor.

In the trommel device 7, when the metal balls B are conveyed on the bottom surface of the trommel device 7, a rotational force is applied to the metal balls B by the rotating power of the device, and the metal balls B contacting each other rotate. This creates frictional forces,
In the trommel device 7, cleaning water stored in a water storage tank 8a provided below the device and pumped up by the circulation pump 9 is constantly supplied, and as a result, polishing water washing is performed.

The metal balls B, which have been washed by the trommel device 7, are transferred onto the conveyor 11 via a chute 6b connected to the outlet of the trommel device 7. The transport conveyor 11 is provided with a plurality of nozzles 10a to 10h arranged at positions capable of injecting washing water from multiple directions with respect to the metal balls B on the transport surface of the conveyor. The surface of the metal ball B is washed with the washing water sprayed from the nozzle, and transported to the next step. The washed water flows into and is stored in a water storage tank 8b located below the conveyor 11 and is cascaded to the water storage tank 8a, and is drained from the water storage tank after the neutralization treatment. As described above, the present invention has been described with reference to one embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and is described in the claims. And other embodiments and modifications that can be considered within the scope of the present invention.

[0017]

As described above, in the apparatus for pickling metal balls according to the first aspect, the acid solution whose temperature has risen due to the heat exchange between the metal balls heated in the inclined pipe and the acid solution is transferred to the screw conveyor. The acid solution is renewed at any time by supplying and discharging the acid solution cooled from the middle part of the screw conveyor several times, and the state of removal of the oxide film is stable and uniform. High quality metal balls can be manufactured. In the pickling apparatus for a metal ball according to claim 2, the cleaning step is constituted by a trommel device, and a cleaning step of polishing and cleaning the surface by rotating the metal ball and rubbing the surfaces together, and washing water with a nozzle from multiple directions. Inject,
By having a cleaning step for finish cleaning, it is possible to reliably remove the acid solution and obtain a uniform cleaning effect on the entire surface. In the pickling apparatus for metal balls according to claim 3, the plurality of transporting means and the plurality of cleaning means are arranged independently for each section, so that the amount of the acid solution attached to the transporting means and taken out to the cleaning step. And the load of the wastewater neutralization work can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of the present invention.

FIG. 2 is a structural view of a screw conveyor of the present invention.

[Explanation of symbols]

 Reference Signs List A acid liquid B metal ball 1 hot forming device 2 inclined pipe 2a main pipe 2b branch pipe 3 screw conveyor 4 acid cutting conveyor 5 acid liquid storage tank 6a, 6b chute 7 trommel device 8a, 8b water storage tank 9 circulation pump 10a to 10h nozzle 11 Conveyor 12 Casing 13 Carry-in port 14 Carry-out port 15 Screw shaft 16a to 16d Liquid outlet 17a to 17c Supply port 18a to 18c Discharge port

Continuing from the front page (72) Inventor Yasuyuki Tabushi 59-46 Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka Inside Nittetsu Plant Design Co., Ltd. 59 Within Nittetsu Plant Design Co., Ltd. (72) Inventor Akiyuki Oda 23rd Honshicho, Shinjuku-ku, Tokyo Inside Asaba Co., Ltd. Reference) 4K053 PA06 PA11 QA01 RA15 SA04 SA12 TA02 TA16 TA18 XA02 XA09 XA11 XA22 XA45 XA46

Claims (3)

[Claims] 1. A continuous pickling apparatus for removing a surface oxide film of a hot-formed metal ball, wherein an acid is applied to a main pipe for continuously receiving and falling down a red-hot metal ball. At the end of the inclined pipe consisting of a branch pipe that sprays the liquid, there are a plurality of perforations at the inlet to remove the acid solution whose temperature has increased due to contact with the glowing metal sphere, and a new acid cooled in the middle. A screw conveyor having a plurality of acid supply ports capable of supplying a liquid and a plurality of acid discharge ports capable of discharging an acid solution used for pickling and having a raised temperature is provided. Pickling equipment for metal balls. 2. A washing step for removing an acid solution adhering to the surface of a metal ball after pickling, comprising a plurality or a single washing step of polishing and washing the surface while transporting the metal ball by a trommel device. A nozzle capable of spraying washing water from a direction is arranged, and a plurality or a single washing step capable of washing the surface while transporting the metal balls by a conveyor capable of being transported horizontally or obliquely is arranged. Item 4. An apparatus for pickling a metal ball according to Item 1. 3. The pickling apparatus for metal balls according to claim 1, wherein a plurality of transporting means and a plurality of cleaning means are independently arranged for each section in the cleaning step.