JPH0857579A - Reclaimed sand recycling method and equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a method and equipment for regenerating the recovered sand accurately and reliably and easily, and also for automating the reclaiming of sand [Structure] Reclaiming the recovered sand A first step of irradiating the recovered sand with light before putting it into the apparatus, and measuring the intensity of the light reflected by the recovered sand by this projection, the intensity of the reflected light in the recovered sand, and the target casting sand It is characterized in that it has a second step of calculating the deviation by comparing the intensity with the reflected light according to the above and a third step of driving the sand reclamation device corresponding to this deviation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method suitable for reclaiming recovered sand when reclaiming the recovered sand and its equipment.

[0002]

2. Description of the Related Art Conventionally, for example, when the recovered self-hardening sand is regenerated and used, the self-hardening sand is regenerated by first weighing a sample of the recovered sand and then burning it to reduce its weight. To check the condition of the recovered sand and apply the recovered sand to the sand reclaimer based on the result of the inspection, or reclaim the recovered sand based on the intuition that the worker has gained by repeating this inspection method. It was done by the method of hanging on the device.

[0003]

However, in such a conventional method for reclaiming recovered sand, it takes a lot of time and labor, and
In the latter case, there were problems that it was inaccurate and lacked in stability, and that sand reclamation could not be automated.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method and equipment capable of accurately and reliably reclaiming recovered sand and also automating the reclaiming of sand. And

[0004]

In order to achieve the above-mentioned object, the present invention is a method for reclaiming recovered sand when reclaiming the recovered sand, and before reclaiming the recovered sand into a sand reclaiming device. The first step of irradiating the collected sand with light, and measuring the intensity of the light reflected by the collected sand by this projection, the intensity of the reflected light in the collected sand, and the reflected light of the target foundry sand. Second, calculating these deviations by comparing with the strength of
The method is characterized by including a step and a third step of driving the sand reclamation device corresponding to this deviation.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. A leveling plate 2 is provided near the upper center of a belt conveyor 1 for transporting recovered sand S, and a belt conveyor 1 is also provided.
At a position on the upper right side of the light projection unit having a function as a light projecting unit for projecting light on the recovered sand S and a function as a reflected light measuring unit for measuring the intensity of the reflected light by the light projecting on the recovered sand S.
The measuring devices 3 are fixedly arranged.

[0006] Further, in the light projecting / measuring device 3, the recovered sand S
The calculation means 4 for calculating the deviation between the intensity of the actually measured reflected light and the intensity of the target reflected light on the basis of the intensity of the reflected light and the data of the storage means 5 described later is electrically connected. The storage means 5 for storing the intensity of the reflected light relating to the target foundry sand and the output means 6 for outputting a signal for driving a sand reclaimer 7 to be described later based on the deviation are electrically connected to each other. There is.

A sand reclamation device 7 is disposed below the right end of the belt conveyor 1, and the sand reclamation device 7 is provided.
In the above, a ball-shaped rotary tank 10 is horizontally rotatably provided inside a cover 9 having a supply port 8. Inside the rotary tank 10, two rolls 11 are provided on the inner surface of the body of the rotary tank 10. Is provided so as to be rollable, and the rotation shaft 12 of each roll 11 is attached to the tip of a support member 13 that is pivotally supported in a vertically rotatable manner. At one end of each support shaft 14 of these support members 13, The upper ends of the arms 15 are fitted and the cylinder 16 is pin-supported between the lower ends of the arms 15. The cylinder 16 is connected to a compressed air source 18 via a pressure proportional valve 17, and the output means 6 is electrically connected to the pressure proportional valve 17, and the output means 6 is connected.
In order to control the magnitude of the force that the roll 11 presses against the inner surface of the body of the rotary tank 10, the compressed air whose pressure is controlled is supplied to the cylinder 16 based on the command signal from It has become.

With such a construction, when the recovered sand S to be regenerated is loaded onto the belt conveyor 1 and the belt of the belt conveyor 1 is rotated in the clockwise direction, the loaded recovered sand S is evenly distributed. It is transferred to the right while flattening the upper surface by the slab 2 and then projected from the light projecting / measuring device 3, and then supplied from the supply port 8 of the sand reclamation device 7 to the rotary tank 10. . The intensity of the light reflected by the collected sand S due to the light projected onto the collected sand S is measured by the light projecting / measuring device 3
And then the intensity of the reflected light relating to the target foundry sand is read from the storage means 5 and the calculation means 4
Thus, the deviation between the actually measured reflected light intensity and the target reflected light intensity is calculated from the intensity of the reflected light at the recovered sand S and the data of the storage means 5, and then this deviation is output by the output means 6. .

With the output from the output means 6, the pressure proportional valve 17 of the sand reclamation device 7 is operated to supply compressed air of which pressure is controlled to the cylinder 16, whereby the arm 15 and the support member 13 are provided. Are rotated up and down, and the roll 11 presses against the inner surface of the body of the rotary tank 10 with a magnitude of force corresponding to the output from the output means 6,
The recovered sand S is pressed and regenerated.

In the above embodiment, as the sand reclaiming device, the one in which the recovered sand is pressed by the roll in the rotary tank is adopted, but the present invention is not limited to this.
For example, the recovered sand may be blown against the recovered sand in a fixed state using compressed air so as to cause the sands to collide with each other. Of course, the number of times may be increased or decreased.

[0011]

As is apparent from the above description, according to the present invention, the collected sand is irradiated with light before the collected sand is put into the sand reclamation apparatus, and the intensity of the light reflected by the collected sand by this projection is adjusted. The first step of measuring, the second step of comparing the intensity of the reflected light in the recovered sand and the intensity of the reflected light of the target foundry sand to calculate these deviations, and making them correspond to this deviation And the third step of driving the sand reclaiming device. Therefore, it is possible to regenerate the recovered sand accurately and reliably and easily, and it is also possible to automate the sand reclaiming. Play.

[Brief description of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

[Explanation of symbols]

 3 Light emitting / measuring device 4 Computing means 5 Storage means 6 Output means 7 Sand recycling device

Claims (2)

[Claims] 1. A method for reclaiming the recovered sand when reclaiming the recovered sand, which comprises irradiating the recovered sand with light before introducing the recovered sand into a sand reclamation device, and projecting the recovered sand with the recovered sand. The first step of measuring the intensity of the reflected light, and the intensity of the reflected light in the recovered sand, and the intensity of the reflected light of the target foundry sand are compared to calculate these deviations.
A method for reclaiming recovered sand, comprising: a step; and a third step of driving the sand reclaiming device in response to this deviation. 2. A facility for reclaiming recovered sand when reclaiming the recovered sand, comprising means for projecting light onto the recovered sand before throwing it into the sand reclamation device, and projecting light onto the recovered sand. Reflected light measuring means for measuring the intensity of the light reflected by the recovered sand, storage means for storing the intensity of the reflected light relating to the target foundry sand, and intensity of the reflected light in the recovered sand and the storage means And a means for calculating a deviation between the intensity of the actually reflected light and the intensity of the target reflected light on the basis of the data, and an output means for outputting a signal for driving the sand reclaimer based on the deviation. A facility for reclaiming recovered sand, which is characterized in that