JP2516535B2 - Dispensing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant amount discharge method for discharging a small amount of an object to be pressure-fed such as an adhesive, a chemical, a magnetic fluid, a solder paste, a silver paste and a grease.

[0002]

2. Description of the Related Art Conventionally, in order to quantitatively discharge an object to be pumped,
For example, a squeeze pump pressure-feeds a body to be pumped into a small amount blowout nozzle connected to the tip of a discharge tube, and a blowoff tube branched and connected to the small amount blowout nozzle intermittently supplies air, A certain amount of the pressure-fed object in the blowing nozzle was discharged to the outside.

In this case, the pressure feed amount of the squeeze pump is calculated from the rotational speed of the rotor or the like, or the relationship between the rotational speed of the rotor and the pressure feed amount is examined by a test, and based on these data, the inside of the minute amount nozzle Therefore, the rotation speed of the rotor is adjusted, or the timing of rotation operation and suspension is adjusted so that a fixed amount of the object to be pressure-fed is pressure-fed.

[0004]

However, the pumping tube of the squeeze pump becomes difficult to restore after long-term use, and the ability to pump the object to be pumped gradually changes (decreases).

For this reason, it is necessary to frequently adjust the rotational speed of the rotor and the timings of rotation operation and suspension in response to changes in the pumping capacity.

Further, the adjustment is difficult and the discharge amount of the pressure-fed member cannot be maintained with high accuracy. Also,
Since the adjustment takes time, the discharge work could not be performed quickly.

Therefore, the present invention solves the above problems,
Even if the restoring force of the pumping tube decreases and the pumping amount per rotation of the squeeze pump changes, there is no need for adjustment, discharge work can be performed easily and quickly, and a constant discharge amount can be maintained for a long period of time. It is an object of the present invention to provide an obtained quantitative discharge method.

[0008]

DISCLOSURE OF THE INVENTION According to the present invention, a blow-out tube is provided, in which a small amount blow nozzle is connected to the tip of a discharge tube of a squeeze pump for pressure-feeding an object to be fed, and gas is intermittently supplied to the minute blow nozzle. When the sensor detects that the trace amount blowing nozzle has reached the tip end of the body to be pressure-fed, the rotor rotation of the squeeze pump is stopped or temporarily reversely rotated, and then This is a method in which gas is supplied from a blow-off tube to blow off and discharge the pressure-fed object from the branch portion to the tip end.

[0009]

[Function] When the sensor detects that the object to be pressured has reached the tip of the minute amount nozzle, the rotor rotation of the squeeze pump is stopped or temporarily reversed, so that the object to be pressure-fed is sent to the detection position of the sensor. Be stopped.

As a result, it is possible to store a constant amount of the object to be pressure-fed in the minute amount nozzle regardless of the pressure-feeding ability of the squeeze pump.

If gas is supplied from the blow-off tube and the pressure-fed object from the branch portion to the tip end is blown and discharged, the pressure-fed object in the minute-amount discharge nozzle can be discharged with a high degree of accuracy. it can.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments.

FIG. 1 shows an example of a constant volume discharge device used in the constant volume discharge method of the present invention. This device has a suction tube 3
The squeeze pump 1 in which the base end of the discharge tube 4 and the base end of the discharge tube 4 are connected to each other, the pressurizing means 2 connected to the tip of the suction tube 3, and the small amount discharge nozzle 5 connected to the tip of the discharge tube 4. I have it. In the present invention, the pressurizing means 2 may be omitted, and the container may simply contain the non-pressure feeding body 7.

The squeeze pump 1 has a pumping tube 8 having one end connected to the base end of the suction tube 3 and the other end connected to the base end of the discharge tube 4, and a rotor rotatably driven by a motor (not shown). 9 and.

The pressurizing means 2 is provided with a cylinder 6 which houses the body 7 to be pressure-fed and a pressure adjusting mechanism 16.

The material of the pressure-fed body 7 is an adhesive,
Examples include chemicals, magnetic fluid, solder paste, silver paste and grease.

The pressure-fed body 7 in the cylinder 6 is pushed out by the air pressure P adjusted by the pressure adjusting mechanism 16, passes through the suction tube 3, and reaches the pumping tube 8 of the squeeze pump 1.

A branch pipe 12 is provided so as to project from the minute amount jet nozzle 5, and a gas R such as air or an inert gas is provided in the branch pipe 12.
The tip of the blow-off tube 10 for intermittently supplying is connected.

At the base end of the blow-off tube 10, a pump,
Alternatively, the compressed air storage container and the gas supply means 17 including a valve such as a solenoid valve are connected.

A sensor S for detecting the arrival of the pressure-fed object 1 is attached to the tip of the minute amount nozzle 5. The sensor S is composed of, for example, a light emitting device such as a laser light emitting device and a photoelectric tube that receives the light.

Further, the sensor S is the squeeze pump 1
Control means 11 for controlling the rotation of the motor and the gas supply means
17 and connected to.

Then, first, the rotor 9 of the squeeze pump 1 is rotated in the normal direction to force the pressure-fed body 7 in the pumping tube 8 to be pressure-fed to the minute amount nozzle 5 through the discharge tube 4.

After that, the sensor S detects that the pressure-fed object 7 has reached the tip of the minute amount nozzle 5.

The rotation of the rotor 9 of the squeeze pump 1 is stopped or temporarily reversed by this detection.
That is, the control means 11 stops or temporarily reverses the motor of the squeeze pump 1 by the signal i from the sensor S.

As a result, as shown in FIG. 2, the pressure-feeding body 7 is stopped at the detection point Y of the sensor S, and the pressure-feeding body 7 is accommodated in the small amount blow-out nozzle 5 in a fixed amount.

As described above, the arrival of the body to be pressure-transmitted 7 is detected by the sensor S to stop the pressure-feeding of the body 7 to be pressure-fed, so that the pumping tube 8 of the squeeze pump 1 becomes difficult to restore after long-term use. Even if the amount of pressure fed per revolution changes, a certain amount of the pressure-fed object 7 can be housed in the small amount blowing nozzle 5 regardless of such a change over time.

Further, when the rotor 9 is temporarily rotated in the reverse direction, the drooping of the pressure-fed body 7 can be prevented, and the pressure-fed body 7 can be prevented.
Can be accurately stopped at the detection point Y of the sensor S.

Next, the gas R is supplied from the blow-off tube 10 to blow off the pressure-fed body 7 from the branch portion 13 of the small-quantity blow-out nozzle 5 to the most distal end and discharge it as shown in FIG.

Actually, the signal i from the sensor S is also transmitted to the gas supply means 17 (not shown), and the gas supply means 17 is operated by this signal i to supply the gas R.

This makes it possible to accurately and quickly supply the gas R after the pressure-feeding body 7 is housed in the small amount blow-out nozzle 5.

By the supply of the gas R, the pressure-fed object 7 having a length dimension L from the branch portion 13 of the minute amount nozzle 5 to the detection point Y of the sensor S is discharged (see FIG. 2).

Since the amount of the pressure-fed body 7 in the length dimension L is constant, the discharge amount can be made highly precise and minute.

By discharging the pressure-feeding body 7 as described above, the pressure-feeding body 7 can be discharged once (one shot).

By repeating the above steps,
It is possible to intermittently discharge a fixed amount (highly accurate small amount) of the pressure-fed body 7 many times.

When the discharge is performed a number of times, the pressure feeding of the pressure-received body 7 and the supply of the gas R are controlled by the signal i from the sensor S. Therefore, the number of times the discharge-target body 7 is discharged per unit time. It is possible to increase the discharge amount and prevent variations in the discharge amount.

FIG. 4 and FIG. 5 show the essential parts of another embodiment,
In this case, a plurality of branch pipes 12 ... Different in distance from the tip of the small amount blow-out nozzle 5 are provided in a protruding manner, and the plurality of branch pipes 12 are provided.
The blow-off tube 10 can be selectively and detachably connected to any one of the ...

The openings of the branch pipes 12 ... To which the blow-off tube 10 is not connected are covered with stop covers 14.

According to this embodiment, the blow-off tube 10
It is possible to change the discharge amount of the pressure-feeding member 7 stepwise by changing the branch pipes 12 ... In addition,
In the illustrated example, the blow-off tube 10 is connected to the branch pipe 12 at the lowermost end, and the amount of one shot discharged is the smallest.

FIG. 6 shows an essential part of another embodiment, in which a sliding nozzle 15 is attached to the small amount blowing nozzle 5, and this sliding nozzle 15 is attached.
By sliding in the longitudinal direction, the length dimension L can be changed steplessly. As a result, the discharge amount can be changed steplessly.

FIG. 7 shows still another embodiment, in which the sensor S can be moved along the longitudinal direction of the minute amount nozzle 5. Also in this case, the length dimension L can be changed similarly to the embodiment of FIG. 6, and the discharge amount can be changed steplessly.

[0041]

Since the present invention is configured as described above,
The following effects are obtained.

The pumping tube 8 of the squeeze pump 1 loses its restoring force due to long-term use, and
Even if the pressure-feed amount per rotation changes, a constant discharge amount of the pressure-fed object 7 can be obtained for a long period of time regardless of such a time-dependent change in the pressure-feed amount.

Further, it is not necessary to adjust the number of revolutions of the rotor 9 of the squeeze pump 1 and the like, and constant and constant amount discharge can be performed. Further, maintenance of the squeeze pump 1 and the like becomes easy.

[Brief description of drawings]

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

FIG. 2 is an enlarged view of a main part showing a usage state.

FIG. 3 is an enlarged view of a main part showing a usage state.

FIG. 4 is an enlarged view of a main part of another embodiment.

FIG. 5 is an enlarged view of a main part of another embodiment.

FIG. 6 is an enlarged view of a main part of another embodiment.

FIG. 7 is an enlarged view of a main part of still another embodiment.

[Explanation of symbols]

 1 Squeeze pump 4 Discharge tube 5 Small amount blow nozzle 7 Pressure feed object 9 Rotor 10 Blow-off tube 13 Branch part R Gas S sensor

Claims (1)

(57) [Claims] 1. A blow-off tube (10) for connecting a small amount of blow-out nozzle (5) to the tip of a discharge tube (4) of a squeeze pump (1) for pressure-feeding an object to be pressure-fed (7) and intermittently supplying a gas (R) to the minute blow-out nozzle (5). When the sensor S detects that the pressure-fed body 7 has reached the tip of the small amount blow nozzle 5, the rotor 9 of the squeeze pump 1 is stopped or temporarily reversely rotated. Then, the gas R is supplied from the blow-off tube 10 to blow and discharge the pressure-fed object 7 from the branch portion 13 to the tip end portion, and the fixed-quantity discharge method.