JPS5837012B2 - Powder mixed liquid supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a powder-containing liquid supply device for supplying a small amount of liquid containing powder that tends to settle.

An example of a device for supplying a small amount of a liquid containing powder that is likely to settle is a device that supplies a lapping liquid containing wrapping powder from a tank to a lapping platen at a rate of 3 to 4 cc/min.

In such a powder-containing liquid supply device, when the flow rate adjustment valve in the lapping liquid flow path is throttled down, the wrapping powder will settle in the lapping liquid flow path from the tank to the lapping surface plate, making the flow path narrower and reducing the supply amount. Furthermore, the flow path may become clogged and the normal operation of the lapping machine may be inhibited.

Further, if the amount of lap liquid supplied is increased, precipitation becomes difficult, but the lap liquid is wasted, which is uneconomical.

In addition, in conventional devices, when the on-off valve connected to the flow path is closed, the settling speed of the wrapping powder increases, and if the closing time differs depending on the cycle of opening and closing, the amount of powder that settles in the flow path also increases. Since they are different, the flow rate of the lap liquid that flows out after the on-off valve opens also differs.

Therefore, in addition to variations in the initial flow rate, the flow rate changes over time, making it impossible to strictly control the amount of processing over time.

The present invention aims to improve the above-mentioned drawbacks, and aims to provide a powder-containing liquid supply device that can supply the lap liquid at a stable flow rate even if the supply amount of the lap liquid is reduced to a very small amount.

The present invention will be explained below based on examples together with the drawings.

FIG. 1 is a schematic explanatory diagram of a powder-mixed liquid supply device of the present invention, in which a tank 1 stores a wrapping liquid 2 mixed with wrapping powder, and the wrapping liquid 2 is supplied to a blade 4 driven by a motor 3. Stirred with

The lap liquid 2 in the tank 1 is supplied to the lap platen 5 through a flow path 9 that includes a flow rate adjustment valve 6, an on-off valve 7, and a vibration generator 8.

The flow regulating valve 6 is generally manually adjusted, and the on-off valve 7 is electromagnetically opened only while the lap platen 5 of the lap plate 10 rotates.

A cross-sectional view showing details of the vibration generating section 8 is shown in FIG.

As shown in the figure, the vibration generating section is connected to a pipe 11 forming a flow path.
It has a lower case 12 which is connected to the lower case 12.

Reference numeral 13 denotes an upper case, which is screwed to the lower case 12 via a diaphragm 14 as a vibration member with screws 14'.
The diaphragm 14 forms a flow section connected to the flow path 9 within the vibration generating section.

15 is a coil that drives an iron vibrator 16 in the vertical direction with an oscillating current.

The vibrator 16 has a lower end connected to the diaphragm 14 and an upper end connected to a leaf spring 17 that holds the vibrator 16 in a neutral position.

Reference numeral 18 designates an upper cover for fixing the leaf spring 17 between the plate spring 17 and the upper case.

To explain the operation of the powder heating liquid supply device equipped with such a vibration generating section, before rotating the lap surface plate 5, the motor 3 is driven to stir the lap liquid 2, and the coil of the vibration generating section 8 is driven. A vibrating current is passed through the oscillator 15 to drive the vibrator 16 to vibrate the diaphragm 14, thereby giving pulsation to the lap liquid 2 in the flow path 9.

Then, the lap liquid 2 in the flow path 9 receives pulsation, and the flow path 9
The wrapping powder that had precipitated and blocked the flow path 9 diffuses into the wrapping liquid 2 again.

In this state, when the lap platen 5 is rotated and the on-off valve 7 is opened at the same time, the lap liquid 2 is smoothly supplied to the lap platen 5.

Here, if necessary, the flow rate adjustment valve 6 may be adjusted and operation started.

By constantly applying pulsation to the wrapping liquid 2 by passing an oscillating current through the coil 15, it is possible to prevent the wrapping powder from settling even if the flow rate of the wrapping liquid 2 is reduced, so that the wrapping liquid can always be supplied at a stable flow rate. can.

FIG. 3 is a cross-sectional view showing another embodiment of the present invention, showing the structure of the vibration generating section that can give pulsation and change the flow rate by changing the frequency or amplitude of the oscillating current. .

In the same figure, 31 is the lower case, which is a pipe 11 that defines the flow path 9.
combine.

32 is an upper case, which is connected to the lower case 3 via a diaphragm 33.
It is screwed to 1.

34 is an L-shaped lever rotatably supported by a shaft 35 fixed to the case 31, one arm 36 of which protrudes like a fin into the channel 9, and the other arm 37 that extends upward through the diaphragm 33. It protrudes into the case 32.

A wire spring 38 fitted into the U-shaped portion at the tip of the arm 37 holds the lever 34 in the neutral position, that is, in the state shown in the figure.

40 is a coil in which the iron arm 37 is driven to swing around the shaft 35 by an oscillating current; 41 is an iron core of the coil 40;

As the arm 37 swings, the arm 36 also swings in directions a and b, giving a pulsation to the lap liquid 2 in the channel 9, and at the same time, a force that pushes the lap liquid 2 away from the tank 1 toward the lap surface plate 5. to occur.

Since this pushing force is changed by changing the frequency or amplitude of the oscillating current, the flow rate can be adjusted, and if this is used, the flow rate adjustment valve 6 can be omitted.

However, it would be more effective if the magnitude or frequency of the oscillating current applied to the vibration generator 8, that is, the amplitude or frequency of the diaphragm, could be adjusted automatically or manually depending on the particle size and flow rate of the wrapping powder, depending on the settling speed of the wrapping powder. It is possible to prevent sedimentation and increase the durability of the vibration generating part.

FIG. 4 is a diagram showing the waveform of the oscillating current applied to the coil 15.40, and the oscillating current can be passed through the coil 15.40 periodically, or the times T1 and T2 can be varied according to the settling speed of the wrapping powder. By doing so, precipitation can be effectively prevented.

In each of the examples, the liquid mixed with powder is used as the lap liquid, but the present invention is not limited to this.

As explained above, the powder-mixed liquid supply device of the present invention has a vibrating member that vibrates electromagnetically in the flow path, so that it can be used not only when the on-off valve is open and the powder-mixed liquid is flowing. Even when the valve is closed and the powder mixture is not flowing, it is possible to prevent the wrapping powder from settling, so as soon as the opening/closing valve is opened, the powder mixture flows smoothly at a constant flow rate.

In other words, since there is no precipitate when the powder-containing liquid is distributed, the on-off valve will open and close frequently even if the on-off valve is opened once it is in operation, and even over time. Even if the supply amount of powder heat injection liquid is small, a constant amount can be supplied at all times, so there is no need to particularly control the processing time or manufacturing time. This makes it possible to improve manufacturing accuracy and greatly contributes to manufacturing equipment.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of the powder-containing liquid supply device of the present invention, Figs. 2 and 3 are cross-sectional views showing each embodiment of the vibration generating section of the present invention, and Fig. 4 shows the waveform of the oscillating current. FIG. 1...Tank, 2...Powder mixed liquid, 5
......Lap surface plate, 6...Flow rate adjustment valve,
7...Opening/closing valve, 8...Vibration generating part, 9
...Flow path, 1 2, 31...Lower case, 13, 32...'' One case, 14.33
...Diaphragm (vibration member), 1 5,
40... Coil, 34... Lever.

Claims (1)

[Scope of Claims] 1. A powder material comprising: a flow path for supplying a liquid mixed with powder; and a vibration generator that vibrates the liquid mixed with the powder in the flow path. Mixed liquid supply device. 2. Claim 1, characterized in that the vibration generating section comprises a vibrating member that is electromagnetically vibrated, and a flow section for a liquid mixed with powder formed by the vibrating member. Powder heat injection liquid supply device as described. 3. The vibration generating section has a vibration member that is electromagnetically vibrated, and the vibration amplitude of the vibration member is formed to increase in the direction in which the liquid containing the powder flows out. A powder-containing liquid supply device according to claim 1.