JP3109232B2 - Viscous material discharge 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 discharging a predetermined amount of a viscous material. In particular, the present invention relates to a device for discharging a predetermined amount of putty or the like to be added in correcting imbalance of a rotating body.

[0002]

2. Description of the Related Art Conventionally, it has been necessary to discharge an accurate amount of putty in an additional correction using a putty in correcting an imbalance of a rotating body. For that purpose, it is necessary to control the volume of putty to be discharged, but it was difficult to measure the volume of a viscous material such as putty in real time. By controlling the opening / closing of a valve provided at the tip nozzle with time, the discharge amount is indirectly controlled.

[0003]

However, since various properties such as viscosity of the putty are not constant due to the influence of temperature, elapsed time, and the like, the volume of the putty discharged from the nozzle per unit time is not constant. With the indirect control method by the discharge time control, it was not possible to discharge an accurate putty. In other words, no matter how accurate the unbalance measurement is performed to determine the volume of the putty to be added, accurate unbalance correction is impossible.

Accordingly, an object of the present invention is to provide an apparatus capable of discharging a viscous material extruded under pressure by an exact volume.

[0005]

According to the present invention, a first opening / closing means capable of shutting off a pressure from a discharge tank to a nozzle portion is provided in a nozzle portion connected to a discharge tank to which internal pressure is applied, and a nozzle portion. A second opening / closing means for opening / closing a discharge port at the tip of the nozzle, a pushing piston projecting / retracting by a predetermined volume inside the nozzle portion, and when filling the viscous material into the nozzle portion,
The second opening / closing means is closed, the first opening / closing means is opened, and the push-out piston is controlled to retreat. When a predetermined amount of the viscous material is discharged from the nozzle portion, the first opening / closing means is closed, and the second opening / closing means is closed. And a control means for controlling the opening and pushing the pushing piston into the nozzle portion by a predetermined amount.

Further, it is preferable that a gas outlet for applying an internal pressure is provided in the discharge tank, and a dispersion plate for dispersing the gas flow to be blown out is provided in a direction of the gas outlet. Further, it is preferable to provide a lubricant supply means for supplying a lubricant to a sliding surface of the sliding portion of the second opening / closing means and the pushing piston opposite to the discharge tank.

[0007]

According to the present invention having the above-described means, when the discharge port at the tip of the nozzle portion is closed by the second opening / closing means, the pushing piston is retracted, and when the first opening / closing means is opened, the discharge tank to which the internal pressure is applied is provided. The viscous material extruded from is filled in the nozzle portion. Next, when the first opening / closing means is closed, the internal pressure of the discharge tank does not affect the nozzle portion.

Therefore, when the second opening / closing means is opened, the viscous material inside the nozzle portion can be discharged from the discharge port. Therefore, when the extruded piston is pushed into the nozzle part, a viscous material equivalent to the volume of the pushed piston becomes
It is discharged from the discharge port. In this way, by controlling the pushing amount of the pushing piston, the discharge amount can be controlled.

Further, if a dispersion plate is provided at the tip of the gas outlet provided in the discharge tank, the blown gas is dispersed by hitting the dispersion plate, and the gas is dispersed at one location on the surface of the viscous material in the discharge tank. Spraying is prevented. Also,
When the second opening / closing means and the pushing piston slide,
Due to the internal pressure of the discharge tank, the second opening / closing means is strongly pressed against the sliding surface opposite to the discharge tank. However, if the lubricant is supplied to the sliding surface by the lubricant supply means, the friction is reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a viscous material discharging apparatus according to the present invention will be described in detail with reference to the drawings showing an embodiment. FIG. 1 is a sectional view of a main part of the viscous material discharging apparatus of the embodiment. In FIG. 1, 1 is a discharge tank storing a putty P as a viscous material, 2 is a nozzle unit, 3 is a first shutter plate as a first opening / closing means, 4 is an extrusion piston provided with a stroke control mechanism, and 5 is a (2) A second shutter plate as opening / closing means, which also serves as a putty cutter. Is a control device for systematically controlling each of the above devices according to the procedure shown in FIG.

[0011] Discharge amount data of the putty to be discharged from the unbalance measuring device (not shown) is input to the control device. Note that the device for the unbalance measurement and the unbalance correction is a conventionally known device, and therefore the description and illustration are omitted.

The first shutter plate 3 is provided between the discharge tank 1 and the nozzle portion 2 and the second shutter plate 5
Is provided at the discharge port 21 of the nozzle portion 2, and the pushing piston 4 is provided between the first shutter plate 3 and the second shutter plate 5. At least the portions of the first shutter plate 3, the pushing piston 4, and the second shutter plate 5 which are in contact with the putty P are made of Teflon resin in order to facilitate the separation from the putty P.

Reference numeral 7 denotes a dispersing plate as dispersing means, which is provided at the tip of the outlet 11. Reference numeral 8 denotes a lubricant supply mechanism provided with a lubricant supply pump, and a supply port is opened on a sliding surface of the pushing piston 4 and the second shutter plate 5.

The operation of the viscous material discharging device having the above-described configuration will be described with reference to FIG. First, as shown in FIG. 2A, based on each control signal from the control device, the first shutter plate 3 is opened, the pushing piston 4 is retracted, the second shutter plate 5 is closed, and the blowing is performed. When air is blown out from the port 11, the putty P in the discharge tank 1 is pushed out and filled in the nozzle portion 2.

Next, as shown in FIGS. 2B and 2C, based on each control signal from the control device, the first shutter plate 3 is closed, and the effect of the internal pressure of the discharge tank 1 is reduced. When the second shutter plate 5 is opened after receiving the putty, the putty P in the nozzle portion 2 can be discharged from the discharge port 21.

Next, as shown in FIG. 2D, based on a stroke control signal output from the control device in accordance with the discharge amount data, the pushing piston 4 is moved by a predetermined length to the nozzle portion 2. When pushed out, putty P having the same volume as the pushed-out piston 4 is discharged from the discharge port 21 which is open.

Next, as shown in FIG. 2E, based on a control signal from the control device, a predetermined amount of putty P is discharged from the discharge port 21 and the second shutter plate 5 is discharged. Is closed, the putty P that has been discharged is cut off. When the cut putty P is added to a position to be added and corrected by a device provided separately or manually, the imbalance of the rotating body is corrected.

Next, as shown in FIG. 2 (F), after the putty P is cut out based on the control signal from the control device, air is blown out from the blowout port 11 to open the first shutter plate 3. When opened, the space in which the first shutter plate 3 recedes is filled with the putty P. Then, push piston 4
Is also retracted, the putty P is filled in the space in which the push-out piston 4 has retracted.

In this way, the inside of the nozzle portion 2 is filled with the putty P without any gap, and returns to the initial state as shown in FIG. 2A, and the above operation is repeated.

As described above, according to the viscous material discharging apparatus, the discharge amount can be accurately controlled by controlling the stroke of the push-out piston 4, so that an effect that accurate imbalance correction can be performed can be obtained. Although only the control of the discharge amount has been described, the use of the viscous material discharge device enables the unbalance correction work to be efficiently and accurately automated.

[0021]

According to the viscous material discharging apparatus of the present invention, the first opening / closing means and the second opening / closing means confine the nozzle in the nozzle, and the second opening / closing means is opened to push out the pushing piston, whereby the viscous material in the nozzle part is pushed out. When the pressure is discharged from the nozzle portion, the pushing amount of the pushing piston is controlled, so that the effect that the discharging amount can be accurately controlled can be obtained.

Further, a dispersing plate is provided at the tip of the gas outlet provided in the discharge tank to disperse the blown gas and to blow the gas to one portion of the surface of the viscous material in the discharge tank. This prevents the viscous material from remaining on the inner wall surface of the discharge tank without forming a depression on a part of the surface of the viscous material in the discharge tank.

Further, since the friction is reduced by supplying a lubricant to the sliding surface where the second opening / closing means and the pushing piston are most pressed when sliding, the sliding resistance is reduced and the driving is easy. And the effect that wear of the sliding portion can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an embodiment of a viscous material discharging apparatus according to the present invention.

FIG. 2 is an operation explanatory view of the viscous material discharging device of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Discharge tank 2 Nozzle part 3 1st shutter board (1st opening / closing means) 4 Extrusion piston 5 2nd shutter board (2nd opening / closing means) Controller 7 Dispersion board (dispersion means) 8 Lubricant supply mechanism (lubricant supply means) P Putty (viscous material)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01M 1/32 B67D 5/30 B67C 3/02 B67D 5/02 B67B 3/30 B67B 39/00 F16F 15 / 32 G01F 11/28 G01F 11/36 G01F 11/40 G01F 13/00 321

Claims (3)

(57) [Claims] A first opening / closing means for shutting off a pressure from the discharge tank to the nozzle portion; a first opening / closing means for opening / closing a discharge port at a tip end of the nozzle portion; (2) Opening / closing means, an extruding piston that protrudes and retracts by a predetermined volume inside the nozzle section, and when filling the viscous material into the nozzle section, closes the second opening / closing means, opens the first opening / closing means, and retracts the pushing piston Control means for closing the first opening / closing means and opening the second opening / closing means when the predetermined amount of the viscous material is discharged from the nozzle portion, and controlling the pushing piston to push the pushing piston into the nozzle portion by a predetermined amount. A viscous material discharging device characterized by comprising: 2. A gas discharge port for applying an internal pressure is provided in the discharge tank, and a dispersion plate for dispersing a gas flow to be blown is provided in a discharge direction of the gas discharge port. Item 6. A viscous material discharging device according to Item 1. 3. A lubricating material supplying means for supplying a lubricating material to a sliding surface of the sliding portion of the second opening / closing means and the pushing piston opposite to the discharge tank is provided. The viscous material discharging device according to claim 2.