JPH0794351B2 - Glazing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glazing apparatus for applying a glaze to a ceramic body such as a tile.

Problems to be Solved by Conventional Techniques and Inventions Conventionally, the amount of glaze applied to a ceramic substrate has been controlled by periodically extracting the substrate after the glaze from the conveyor and measuring the weight or thickness thereof. Therefore, if the amount of glaze applied changes due to nozzle clogging or wear, it is not possible to respond promptly, and a large number of defective products may occur.

Means for Solving the Problems The present invention is a conveyor that conveys a ceramic base material in one direction, a nozzle that is disposed above the conveyor and that ejects a glaze solution, and the amount of glaze applied to the base material is automatically adjusted. And a control device for automatically controlling the ejection amount of the glaze liquid from the nozzle in accordance with the output of the measurement device.

The operation and effect of the present invention has the above-mentioned configuration, so that the amount of glaze applied to the base material is automatically measured and the ejection amount of the glaze liquid from the nozzle is automatically controlled based on the measurement result. Therefore, for example, when the jet outlet of the nozzle gradually wears and expands, the spray amount of the glaze liquid gradually increases, and the amount of glaze applied to the base material also gradually increases. Since the amount of glaze is automatically measured, it is possible to measure the amount of glaze applied on the base material that flows on the conveyor, and the amount of glaze liquid spray is automatically controlled in response to slight fluctuations in the amount of glaze applied. can do. Therefore, it is possible to prevent the occurrence of defective products in advance, and even if the amount of glaze applied to the substrate is suddenly reduced due to sudden clogging of the nozzle ejection port, it is possible to respond to this very quickly, This is effective in preventing a large number of defective products.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of the present invention, in which both the glaze pump 1 and the water pump 2 are variable pumps whose discharge amount changes depending on the number of revolutions, and the suction pipe of the glaze pump 1 is a stirrer 4. The glaze tank 3 provided therein and the suction pipe of the water pump 2 are respectively inserted in the water tank 5, and both pumps 1,
The discharge pipe of No. 2 is connected to the mixer 6, the discharge port of the mixer 6 is connected to the nozzle 7 provided in the glaze chamber 8, and the glaze liquid in which the glaze and water are mixed in the mixer 6 is a compressor. It is mixed with the pressurized air supplied from 10 and atomized, and is sprayed on the upper surface of the ceramic base a such as tiles conveyed on the conveyor 11 in the arrow direction. A flow rate / density meter 12 for measuring the flow rate and density of the glaze solution is provided between the mixer 6 and the nozzle 7, and the output thereof is converted into an electric signal by the converter 13 and the flow rate value is adjusted by the flow rate controller 14 And totalizer
20, the density value is input to the density controller 16 via the density calculator 15, respectively, and the flow rate controller 14 and the set value set by the output of the weight controller 24 described later and the actual value. The flow rate value is compared and the difference is calculated, the output of which is input to the glaze pump controller 17 and the comparison setter 18, and the density adjuster 16 calculates the density. The actual density of the glaze input from the device 15 is compared with a preset proper density to calculate the difference, the output of which is input to the comparison setting device 18 and compared with the output from the flow controller 14. Then, the amount of water for achieving the proper density is calculated, and the output is input to the water pump control device 19 to change the rotation speed of the water pump 2.

Before and after the glazing chamber 8 on the lower surface of the conveyor 11, the base material a before glazing
A first weight scale 21 for measuring the weight of the base material and a second weight scale 22 for measuring the weight of the base material a after glazed are arranged.
The output of 22 is input to the weight calculator 23 and the difference, that is, the weight of the glaze is calculated, and the output is input to the weight adjuster 24 and compared with a preset proper weight, and the deviation is brought close to zero. The flow rate of the glaze liquid is calculated and input to the flow rate controller 14 as a set value.

Therefore, when the amount of glaze applied to each substrate a calculated by the weight calculator 23 is different from the appropriate value, the flow rate of the glaze liquid required to eliminate the difference is input from the weight controller 24 to the flow controller 14. , The glaze liquid is compared with the actually measured flow rate of the glaze liquid, and the difference is calculated and input to the glaze pump control device 17, and the output changes the rotation speed of the glaze liquid pump 3, and the ejection amount of the glaze liquid from the nozzle 7 is appropriate. The automatic control is performed so that the density of the glaze liquid is adjusted by the density controller 16 and the ratio setter 18.
As a result, the water pump control device 19 operates to control the discharge amount of the water pump 2 so that the water pump 2 is maintained at an appropriate preset value. A pressure gauge 25 is connected to the glaze liquid pressure feed line of the nozzle 7, and an alarm device 26 is activated when the pressure fluctuation exceeds a certain range.

Next, the first and second weight scales 21 and 22 used in this embodiment will be described. FIGS. 2 to 4 show the first embodiment, one of which is rotationally driven by a motor (not shown). The upper and lower two arms 31, 32 are rotatably supported by the base body 30, and a vertical bar 33 is connected to the tip of each arm 31, 32 to form a parallel link mechanism. A supporting member 35 which is inserted between the weighing device 34 and the bar slat 11a constituting the conveyor 11 is attached to the shaft. When the arms 31 and 32 rotate clockwise from the state shown in FIG. Then, as shown in FIG. 3, the support 35 projects upward from between the racket racks 11a and lifts the base a to measure its weight. When the support 35 is further rotated, the support 35 is lowered as shown in FIG. , The base a is returned to the Verslat, and the arm 31 32 rotation is performed in synchronization with the conveyance of the conveyor 11, bearing member 35 is summer so as not to interfere with Basuratsuto 11a. This example
Since the base material a supported by the support 35 does not cause only horizontal movement, the measurement density is always low due to vertical acceleration, but the structure is simple and the mounting space is small.

5 to 7 show a second embodiment of the weighing scales 21 and 22,
Two pairs of upper and lower sprockets 41 to 44 are axially supported on a base 40, and upper sprockets 41 and 42 and lower sprockets 43 and 44 are supported.
The endless chains 45 and 46 are respectively laid over the horizontal chain, and the horizontal running parts of the chains are parallel to the conveyor 11.The upper and lower sprockets 42 and 44 on the right side are respectively small sprockets 4.
7, 48 fixed concentrically to these small sprockets 47, 48
And the endless chain 50 is hung between the drive sprocket 49 connected to the motor (not shown), and when the drive sprocket 49 rotates clockwise, the upper and lower endless chains 45,
The 46 circulates in the same direction at the same speed.
A vertical bar 51 is connected to each of the links of the upper and lower endless chains 45 and 46 so that the endless chains 45 and 46 can perform the same circulation while maintaining a vertical posture as the chains travel. A measuring instrument 52 and a support 53 are attached to the upper end of the vertical bar 51, and when the vertical bar 51 circulates in the direction of the arrow from the state shown in FIG. 5, as shown in FIG. The tool 53 projects upward from between the burslats 11a so that the base a
After being supported and running in the horizontal direction at the same speed as the conveyor 11, the substrate a is returned onto the conveyor 11 and retracted downward as shown in FIG. In the present embodiment, the base a is the support tool.
Since it is supported by 53 and travels in the horizontal direction, it is possible to weigh without being subjected to vertical acceleration, and there is an advantage of high measurement accuracy.

FIG. 8 shows a third embodiment of the weighing scales 21 and 22, and this embodiment uses two suction cups 61 and 62 which are vertically arranged to convey a conveyor as shown in (1) to (6) of FIG. After the substrate a conveyed on the surface 11 is adsorbed and placed on the weighing machine 63 to measure the weight, the operation of returning the substrate a onto the conveyor 11 again is repeated.

In addition, it is preferable in terms of accuracy that the base a measured by the first weight scale 21 is glazed and then measured by the second weight scale 22 to calculate the weight difference. After temporarily storing the measurement value of the scale 21 in the weight calculator 23,
When the base a is transported to the position of the second weighing scale 22, its weight may be measured and compared with the measured value before glazing.

FIG. 9 shows a second embodiment of the present invention, which has the same configuration as that of the first embodiment except that the amount of glaze is measured not by the difference in weight of the base a before and after the glaze but by the difference in thickness. Therefore, the same symbols are attached and the description thereof is omitted.

In front of and behind the glazing chamber 8 of the conveyor 11, first and second thickness sensors 7 consisting of a pair of upper and lower rangefinders utilizing sound waves and light.
1, 72 are arranged, and the distances to the upper surface and the lower surface of the base a before and after glazing are measured, and the measured values are input to the first and second total thickness calculators 73 and 74. Calculate the total thickness before and after glaze, input these to the glaze thickness calculator 75 and compare them to calculate the difference, that is, the thickness of the glaze, and calculate the calculated result. It is input to 76 and compared with the preset proper thickness, and the flow rate of the glaze to bring the deviation close to zero is calculated.
It is inputted as 14 set values, and its operation is the same as that of the first embodiment.

[Brief description of drawings]

FIG. 1 is a block diagram showing the outline of the first embodiment of the present invention,
2 to 4 are side views showing the operation of the first embodiment of the weighing scale, FIGS. 5 to 7 are side views showing the operation of the second embodiment of the weighing scale, and FIG. 8 is the weighing scale. FIG. 9 is a side view showing the operation of the third embodiment, and FIG. 9 is a block diagram showing the outline of the second embodiment of the present invention. 1: Glaze pump, 2: Water pump, 3: Glaze tank, 5: Water tank, 6: Mixer, 7: Nozzle, 11: Conveyor, 12: Flow rate / density meter, 13: Signal converter, 14: Flow rate adjustment Device, 15: Density calculator, 1
6: Density controller, 17: Glaze pump controller, 18: Comparison setting device, 19: Water pump controller, 21, 22: Weight scale, 23: Weight calculator, 24: Weight controller, 71, 72: Thickness Sensor, 73, 74: overall thickness calculator, 75: glaze thickness calculator, 76: thickness adjuster, a:
Foundation

Claims (3)

[Claims] 1. A conveyor for transporting a ceramic base material in one direction, a nozzle arranged above the conveyor for ejecting a glaze solution, and a measuring device for automatically measuring the amount of glaze applied to the base material. And a controller for automatically controlling the amount of the glaze liquid ejected from the nozzle in accordance with the output of the measuring device. 2. The glazing device according to claim 1, wherein the device for measuring the amount of glaze applied is a device for measuring the weight of the base material after glazing. 3. The glazing device according to claim 1, wherein the device for measuring the amount of glaze applied is a device for measuring the thickness of the base material after glazing.