JP6934706B2 - Casting sand removal system - Google Patents

Description

The present invention relates to a system for removing foreign matter such as sand remaining in a casting.

Cast products (workpieces) of aluminum and cast iron are widely used as components of various products including automobiles. Many castings have a complicated structure, such as providing large and small holes to make an opening or making the inside hollow. In this complicated structure casting, a core that matches the configuration is placed in the mold for molding the casting, and the molten metal casts and wraps the core to form a casting with a complicated structure as designed. Has been done.

Since the core used in the manufacturing process of the cast product is formed of sand or the like, it adheres to and remains in the cast product as a foreign substance such as sand after casting. The core is indispensable for casting, but after casting, it adheres to the casting as foreign matter such as sand and remains, so it must be removed. Therefore, as a post-casting process, it is possible to remove foreign substances such as sand by continuously striking the cast product, or to dispose of a sand removing device to remove core materials such as sand. It has been. For example, Patent Document 1 is a vibration sand removing device for a work that removes core sand adhering to a hollow portion of a work by vibrating a casting (work) formed by casting such as an automobile part. A vibrating sand remover that holds a vibrating base plate and removes the vibrating base plate by vibrating it with a single vibrating motor is disclosed.

Finally, foreign matter such as sand is visually inspected by an operator, and the foreign matter such as sand that adheres and remains manually is removed with a brush or the like to complete the cast product.

Japanese Unexamined Patent Publication No. 2012-050990

As described above, the removal of foreign matter such as sand remaining after casting requires a complicated process and manual work by an operator, which is a bottleneck for simplification of the manufacturing process.

Further, as the structure of the cast product becomes complicated, the conventional sand removing device cannot reliably remove foreign matter such as sand, and the burden of visual inspection and removal work of the operator tends to increase.

Therefore, the present invention has been made in view of such a problem, and it is possible to reliably remove sand and foreign substances adhering to and remaining on the casting, and it is possible to simplify the removal process. The purpose is to provide a sand removal system for goods.

In order to solve the above problems, the sand removal system for a casting according to the present invention is a sand removal system for a casting that removes foreign matter such as sand adhering to the casting, and raises and lowers the casting. The ultrasonic cleaning device is provided with an elevating device for cleaning the casting and an ultrasonic cleaning device for cleaning the casting to remove foreign substances. The ultrasonic cleaning device includes a cleaning tank containing cleaning water for cleaning the casting and ultrasonic waves. The elevating device is provided with an ultrasonic oscillating plate for oscillating and giving a slight vibration to the casting to clean the casting, and the elevating device is characterized in that the casting is immersed in the cleaning water in the cleaning tank.

According to this, since the cast product is shaken in the cleaning tank and subjected to micro-vibration by ultrasonic waves for cleaning, sand and foreign matter adhering to and remaining on the cast product can be reliably removed. The removal process can also be simplified.

Here, it is preferable that the elevating device includes a rotating means that can rotate the cast product to adjust the direction of the opening of the cast product.

As described above, according to the sand removal system for a cast product according to the present invention, sand and foreign matter adhering to and remaining on the cast product can be reliably removed, and the removal process can be simplified. ..

It is a figure which shows the schematic structure of the sand removal system of a casting. It is a figure which shows the structure of the washing tank. It is a plan view of the sand removal system of a casting.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of a sand removal system for a cast product of the present embodiment. FIG. 2 is a diagram showing a configuration of a cleaning tank used in a sand removal system for cast products. FIG. 3 is a schematic plan view of a sand removal system for cast products.

The sand removal system for the cast product of the present embodiment includes an elevating device for raising and lowering the cast product (work) W, an ultrasonic cleaning device 1 for cleaning the work W, and degassing to reduce the amount of dissolved oxygen in the cleaning liquid. A device 20, a dirty tank 30, a sand recovery filter 40, a clean tank 50, and a temperature controller 60 that adjusts the water in the clean tank 50 to an appropriate temperature are provided.

The ultrasonic cleaning device 1 includes a cleaning tank 10 for immersing the work W in cleaning water to clean the work W, and an ultrasonic wave for oscillating ultrasonic waves to swing the work W to give a slight vibration for cleaning. It includes an oscillating plate 11, a cleaning nozzle 12 for cleaning the work W with a shower, and an overflow pipe 13 for keeping the water level of the cleaning tank 10 constant.

The degassed water supply pipe 21 is a pipe that sends water from the clean tank 50 to the cleaning tank 10, and the degassing device 20 is interposed in the middle of the pipe.

The dirty tank 30 receives the drainage from the cleaning tank 10 from the overflow pipe 13. The pump P1 is a pump for draining water from the dirty tank 30 so that the water in the dirty tank 30 does not change to alkaline, and the pump P2 is a pump for sending water from the dirty tank 30 to the sand recovery filter 40. ..

The sand recovery filter 40 is a filter that collects and removes sand in the dirty tank 30 and the washing tank 10. The drainage / sand recovery pipe 41 is a pipe for collecting drainage and sand from the washing tank 10, and the ejector 42 sucks the drainage / sand from the drainage / sand recovery pipe 41.

The clean tank 50 is a tank for receiving the water filtered by the sand recovery filter 40 and sending it to the washing tank 10.

The elevating device is provided with a rotation mechanism for rotating the work W. The cleaning tank 10 is provided with one ultrasonic oscillating plate 11 on each of its three orthogonal surfaces. Among the ultrasonic oscillator plates 11, those installed on the lower surface of the cleaning tank 10 are installed so as to float from the lower surface. The drainage / sand recovery pipe 41 is connected to the lower part of the cleaning tank 10. The ejector 42 is provided downstream of the pump P2 that sends water from the dirty tank 30 to the sand recovery filter 40. The sand recovery filter 40 has a cyclone filter and a pug filter, and the cyclone filter performs the first-stage processing, and the pug filter performs the second-stage processing.

Next, the operation of this system will be described.

In the sand removal system for the cast product of the present embodiment, the work W is submerged in the cleaning tank 10 by the elevating device. At that time, the direction of the work W is adjusted by the rotation mechanism so that the opening of the work W faces upward and the air inside is released. Then, the work W is oscillated in the cleaning tank 10 and ultrasonic cleaning is performed by the output from the ultrasonic oscillating plate 11. At this time, sufficient cleaning ability can be ensured by the output of the three ultrasonic oscillator plates 11. Further, the temperature of the water in the clean tank 50 is adjusted by the temperature controller 60, and the water is sent to the cleaning tank 10 through the degassed water supply pipe 21, so that the water temperature rises due to the output of the ultrasonic oscillator plate 11 for cleaning. It is possible to prevent a decrease in ability.

After the ultrasonic cleaning is started, the work W is raised above the water surface of the cleaning tank 10 by an elevating device so that the sand peeled off inside the work W is discharged to the outside, and the sand is lifted outside the work W together with water. Discharge to. At this time, the direction of the work W is adjusted by the rotation mechanism so that the opening of the work W faces downward and the water inside is discharged. Further, the cleaning nozzle 12 flushes the portion where the sand is difficult to come out with a water stream. The above is alternately performed with ultrasonic cleaning a plurality of times to clean the work W and remove sand. At this time, the work W is lifted above the water surface of the cleaning tank 10 and put into the cleaning tank 10 again a plurality of times, so that the amount of dissolved oxygen in the cleaning tank 10 increases and the cleaning capacity is increased. However, by constantly supplying the water in the clean tank 50 degassed by the degassing device 20 to the cleaning tank 10 through the degassed water supply pipe 21, it is possible to prevent the cleaning capacity from deteriorating. Further, the cleaning tank 10 to which the degassed clean tank 50 water is constantly supplied can keep the water level constant by having the overflow pipe 13.

The sand removed from the inside of the work W is deposited in the lower part of the washing tank 10. Here, when the pump P2 that sends water from the dirty tank 30 to the sand recovery filter 40 operates, the ejector 42 becomes a negative pressure, and the sand in the cleaning tank 10 is sucked out through the drainage / sand recovery pipe 41. Further, foreign matter contained in the water that has moved from the cleaning tank 10 to the dirty tank 30 through the overflow pipe 13 is also sent to the sand recovery filter 40 by the pump P2 that sends water from the dirty tank 30 to the sand recovery filter 40. .. In the sand recovery filter 40, sand and foreign matter are removed, and the removed water is sent to the clean tank 50. In this way, the sand removed from the work W is recovered.

As described above, according to the sand removal system for the cast product of the present embodiment, the work is shaken in the cleaning tank and subjected to micro-vibration by ultrasonic waves for cleaning, so that it adheres to and remains on the work. Sand and foreign matter can be reliably removed. In addition, it is possible to simplify the removal process by eliminating the need for complicated processes such as a sand removing device and manual work by an operator.

The sand removal system for cast products according to the present invention has been described above based on the embodiments, but the present invention is not limited thereto, the object of the present invention can be achieved, and the gist of the invention is not deviated. Various design changes are possible within the scope, and all of them are included within the scope of the present invention.

The present invention is useful as a sand removal system for cast products that removes foreign matter such as sand that adheres to and remains on the cast product after casting aluminum or cast iron.

1 Ultrasonic cleaning device 10 Cleaning tank 11 Ultrasonic oscillator plate 12 Cleaning nozzle 13 Overflow piping 20 Degassing device 21 Degassing water supply piping 30 Dirty tank 40 Sand recovery filter 41 Drainage / sand recovery piping 42 Ejector 50 Clean tank 60 Temperature control Machine P1 pump P2 pump

Claims (1)

A sand removal system for castings that removes foreign matter such as sand adhering to the casting.
Equipped with an elevating device for raising and lowering the cast product and an ultrasonic cleaning device for cleaning the cast product to remove foreign substances.
The ultrasonic cleaning device is
A washing tank filled with washing water for washing castings,
An ultrasonic oscillating plate for oscillating ultrasonic waves to oscillate the casting and giving micro-vibration for cleaning.
A degassing device for reducing the amount of dissolved oxygen in the washing water is provided.
The elevating device includes a rotating means that can rotate the cast product to adjust the direction of the opening of the cast product, and when the cast product immersed in the washing tank is raised above the water surface, the rotating means Turns the opening of the casting downward, discharges the foreign matter and cleaning water that the ultrasonic cleaning device peels off from the casting, and then immerses the casting in the cleaning water in the cleaning tank again. ,
The ultrasonic cleaning device is a sand removal system for a cast product, which comprises peeling and removing foreign matter from the cast product.

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