JP2547621Y2 - Paint supply amount setting device in powder paint quantitative supply device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supplying a powder coating material to a coating gun at a predetermined constant flow rate using a bench-uri pump, and more particularly to an improvement in a device for setting the supply amount of the coating material. .

[0002]

2. Description of the Related Art First, an outline of an example of this kind of powder paint quantitative supply apparatus will be described with reference to FIG. 1 showing an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a paint tank in which a powder paint a placed on an upper surface of a net 2 is filled in a flowing state by flying up by air pressure from the lower surface of the net 2. The lower end of a suction pipe 5 whose upper end communicates at right angles to the air passage 4 of the bench-uri type pump 3 is fitted into the paint tank 1, and high-pressure air is supplied from the air supply source 6 to the air passage 4 and ejected. Then, the upper end portion of the suction pipe 5 becomes a negative pressure, and the powder paint a is sucked up and jetted out by the pressure difference between the paint tank 1 and the paint tank a so as to be supplied to the paint gun 8 through the hose 7. ing.

In the meantime, the actual pressure difference between the pressure at the lower end of the suction pipe 5 and the pressure at the lower end of the suction pipe 5 which is substantially equal to the internal pressure of the paint tank 1 is a differential pressure detector. 10 and is converted by a converter 11 into a detected value x consisting of a voltage value. The discharge flow rate, that is, the supply amount of the powder coating material a increases or decreases in proportion to the above-mentioned differential pressure.

The detected value x of the actual differential pressure is indicated by a display
And the actual paint supply amount is displayed, and the detected value x
Is also sent to the comparator 13. In the comparator 13, the detected value x of the actual differential pressure is compared with a reference value y of the differential pressure set in advance corresponding to the target paint supply amount, and the calculated value is calculated by the amplifier 14. After the amplification, the air is fed back to a regulator 16 provided in an air supply path 15 to the bench-uri pump 3 so that the actual differential pressure matches the differential pressure corresponding to the target paint supply amount. And the paint supply amount is maintained at a target value.

[0006]

Incidentally, the above-mentioned target value of the paint supply amount is not always constant and needs to be changed as needed in accordance with the type of the object to be coated. Conventionally, a setting device provided with a potentiometer for adjusting the reference value y of the differential pressure is provided as a means for this purpose.
The potentiometer is adjusted while watching the analog type indicator 12 by throwing away the above, so the setting work takes time, and in particular, the coating line where the type of the object to be coated frequently changes. Then, the time loss became a big problem. In addition, an analog display meter 12
Since the setting is performed while observing the characteristics, there is a possibility that individual differences will inevitably occur, and the quality of the coated object such as the film thickness will vary.

[0007]

SUMMARY OF THE INVENTION A paint supply setting device in a powder paint quantitative supply device of the present invention has been devised in view of the above points, and has a plurality of paint supply target values and a target value. By selecting and inputting the supply amount setting means preliminarily storing the reference values of the differential pressures necessary for obtaining the respective target values and one of the target values, the corresponding target value is obtained. Selection means for calling the reference value of the differential pressure from the supply amount setting means and sending it to the comparator, and digital display means for digitally displaying the selected target value.

[0008]

When the target value of the paint supply amount corresponding to the type of the object to be coated is input by the selection means, the reference value of the differential pressure corresponding to the target value, which is stored in advance in the supply amount setting means, is called and compared. And the setting of the target value is completed. At that time, the selected target value is digitally displayed by digital display means.

[0009]

As described above, according to the present invention, it is possible to instantaneously set or change the paint supply amount by simply inputting the target value of the paint supply amount, and the line in which the type of the object to be coated frequently changes. However, there is almost no time loss, and the work efficiency can be greatly improved. In addition, since the set target value can be confirmed by digital display, there is no danger of making mistakes or individual differences, and there is an effect that a coated product having no variation in quality can be obtained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. In this embodiment, the supply amount setting unit 20 is connected to the comparator 13 described in the section of the related art via a selector 21 described later.
Is connected. The supply amount setting device 20 stores a plurality of target values of the paint supply amount and a reference value y of the differential pressure necessary for obtaining each target value.

The above-mentioned selector 21 is of a channel switching type, and the above-mentioned respective target values are determined correspondingly for each channel, and the respective target values are inputted to the supply amount setting device 20 by selecting the channel. Then, the reference value y of the differential pressure corresponding to each stored therein is called and output as the reference value of the comparator 13.

A digital display 22 is attached to the supply amount setting device 20 so that a target value of the paint supply amount selected by the selector 21 is digitally displayed. .

The present embodiment has such a structure. When the target value of the paint supply amount corresponding to the type of the object to be coated is confirmed by the digital display 22 and the channel of the selector 21 is switched and selectively inputted, The reference value y of the differential pressure corresponding to the target value stored in advance in the supply amount setting device 20 is called and sent to the comparator 13. Thus, the setting of the reference value y of the differential pressure, that is, the setting of the target value of the paint supply amount is instantaneously and accurately completed.

[Brief description of the drawings]

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

[Description of Signs] a: Powder paint 1: Paint tank 3: Bench-uri pump 5: Suction pipe 8: Painting gun 10: Differential pressure detector
11: converter 13: comparator 15: air supply path 16:
Regulator 20: Supply amount setting device 21: Selector 2
2: Digital display x: Detection value of differential pressure y: Reference value of differential pressure

Claims (1)

(57) [Scope of request for utility model registration] 1. A paint tank filled in a paint tank is sucked up by a bench-uri pump using a negative pressure generated by the ejection of control air, and is pumped to a paint gun.
An actual differential pressure between the negative pressure portion and the paint tank is detected by a differential pressure detector, and a detected value converted into an electric signal corresponding to the actual differential pressure is determined by a reference value of a predetermined differential pressure and a comparator. By comparing and controlling the regulator provided in the supply path of the control air based on the comparison result to increase or decrease the flow rate of the control air, the supply amount of the powder paint is kept substantially constant. An apparatus for setting a supply amount of a powder paint in a body paint quantitative supply device, wherein a target value of a plurality of paint supply amounts and a reference value of the differential pressure necessary for obtaining each of the target values are mutually determined. The supply amount setting means correspondingly stored in advance, and by selectively inputting one of the target values, a reference value of the differential pressure corresponding to the selected target value is called from the supply amount setting means and Selecting means for sending to the comparator; Digital display means for digitally displaying a target value, to consist of paint supply amount setting device in the powder coating material dispensing device comprising a.