JPH10216899A - Method and device for judging core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically judge acceptance/rejection of a sand core by mixing the casting sand with red iron oxide to manufacture the core, and comparing the color of the manufactured core with the color of the core in which the red iron oxide is mixed with the prescribed mixing ratio for judgment using a color-difference meter. SOLUTION: A fiber sensor 2 of a color-difference meter 1 to judge the color of a core and judge acceptance/rejection of the mixing ratio of red iron oxide is installed on a line side downstream of the molding process of a conveyor 15 of a core production line to manufacture a sand core 10. The core 10 flowing on the conveyor 15 is irradiated with the light from the fiber sensor 2, and the reflected light from the core 10 is received by the fiber sensor 2. The signal of the reflected light is judged to be whether or not it is within the range of the prescribed color by a judging device 3. When the signal is in the range of the prescribed color, the core production line is continuously operated. When the signal is outside the range, the signal is transmitted to a control device 5 to stop the conveyor 15, and an alarm is given to inform that the line is stopped, and the line is returned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for judging the quality of a sand core based on the color of the surface of the sand core.

[0002]

2. Description of the Related Art Conventionally, the detection of a defect in a sand core, such as an improper mixing ratio of a petiole or a lack of a mold, has been carried out only by visual confirmation.

[0003]

However, the production of the core is automated, and the production from the modeling to the drying of the coating mold is being performed on an automated line. Although the necessity of mechanizing the check was recognized, the color difference meter was visually confirmed because it was a large and expensive device. However, since a small-sized and excellent device using a fiber sensor has been developed, an object of the present invention is to provide a method and a device for judging pass / fail of a sand core using the device.

[0004]

According to the present invention, there is provided a method for judging the quality of a sand core based on the color of the surface of the sand core. It comprises a core manufacturing process and a comparison / determination process for comparing and determining the color of the core manufactured using the color difference meter and the color of the core in which the petals are mixed at a predetermined mixing ratio.

Further, according to the present invention, in a judging device for judging the quality of a sand core based on the color of the surface of the sand core, a core manufacturing means for manufacturing a core by mixing molding sand and a valve stem. When,
A color difference meter that compares the color of the manufactured core with the color of the core in which the red iron oxide is mixed at a predetermined mixing ratio, and a determination that determines the quality of the core based on the comparison result of the color difference meter. And means.

Further, according to the present invention, in a judging method for judging the quality of a sand core based on the color of the surface of the sand core, a core manufacturing step of molding and coating a core with molding sand, and a color difference meter And a comparison / determination step of comparing and determining the color of the core manufactured using the method described above with the color of the core coated with a predetermined coating material.

Further, according to the present invention, there is provided a judging device for judging pass / fail of a sand core based on the color of the surface of the sand core. A color difference meter that compares the color of the core with the color of the core coated with a predetermined coating material, and a determination unit that determines the acceptability of the core based on the comparison result of the color difference meter. ing.

Since the present invention is configured as described above, conventionally, in an automated core production line,
The confirmation after the pattern mixing process and the coating process, which had been visually confirmed, can be automated, and there is no individual difference, so the quality is improved.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a core production line using a sand core quality judgment apparatus according to the present invention. The core production line conveyor for producing a sand core 10 is shown in FIG. At the line side after the core forming process of the fifteen cores, a fiber sensor 2 of a color difference meter, which is a well-known technique, which is generally denoted by reference numeral 1 and determines the color of the cores and determines the quality of the mixing ratio of the petals. ing. Then, the light from the fiber sensor 2 is applied to the core 10 on the conveyor 15, and the reflected light is received by the fiber sensor 2.
The fiber sensor 2 uses an electric circuit A to determine a color
The determination device 3 is connected to a power supply 4 by an electric circuit B, and is connected to a control device 5 for controlling the core line by an electric circuit C.

Hereinafter, the operation will be described with reference to FIG.

In operation, the controller 5 of the core production line
Then, the judgment device 3 is turned on to operate the line, the core 10 flowing on the conveyor is irradiated with light from the fiber sensor 2, and the reflected light from the core 10 is received by the fiber sensor 2 (step S1). ). The signal of the reflected light is determined by the determination device 3 to determine whether it is within a predetermined color range (step S).
2). If the answer is YES, the core line is continuously operated. If the answer is NO, a signal is sent to the controller 5 to stop the conveyor 15 of the core line, and an alarm is issued (steps S4 and S5) to stop the line. Notify and return.

Further, in the case of coating, the fiber sensor 2 may be installed after the automatic coating process on the line side.

[0014]

The present invention is configured as described above,
In an automated core production line, it is possible to automate the confirmation after the redox process and the coating process, which has been difficult in the past. And, unlike the case of visual confirmation, according to the present invention, the influence of individual differences (visuality) between the workers engaged in the confirmation work is eliminated, and the accuracy and efficiency of the confirmation work are improved. The quality is improved.

[Brief description of the drawings]

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

FIG. 2 is a flowchart of the control in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Color difference meter 2 ... Fiber sensor 3 ... Judging device 5 ... Control device 10 ... Core 15 ... Conveyor

Claims (4)

[Claims] 1. A method for judging the quality of a sand core based on the color of the surface of the sand core, the method comprising a step of manufacturing a core by mixing molding sand and a red iron stem, and using a color difference meter. A determination step of comparing and determining the color of the core manufactured by the method and the color of the core in which the petal is mixed at a predetermined mixing ratio. 2. A method for determining the quality of a sand core based on the color of the surface of the sand core. A color difference meter for comparing the color of the child and the color of the core in which the petal is mixed at a predetermined mixing ratio, and determination means for determining the quality of the core based on the comparison result of the color difference meter, A sand core judging device characterized by including: 3. A method for determining the quality of a sand core based on the color of the surface of the sand core, wherein the core is formed using molding sand, and the core is manufactured using a color difference meter. A method for determining a sand core, comprising: a comparison determining step of comparing and determining the color of the core with the color of the core coated with a predetermined coating material. 4. A core determining means for determining the quality of a sand core based on the color of the surface of the sand core. A sand meter comprising: a color difference meter for comparing the color of a core coated with a predetermined coating material with a color difference meter; and determination means for determining the quality of the core based on a comparison result of the color difference meter. Core judging device.