JPH0520432Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a powder metering and feeding device suitable for being attached to, for example, a press device that presses powder to produce a molded product.

"Prior art and its problems" There are various types of press equipment for press forming, but Figure 3 shows a dry cold isostatic press (CIP)
(abbreviated as "equipment") is shown below. This CIP equipment is for manufacturing a truncated cone-shaped press-formed product W as shown in Fig. 4. In Fig. 3, numeral 1 is a pressure vessel, and 2 is a pressure vessel provided on its inner surface. 3 is an upper ram, 4 is a mandrel, and 5 is a mold having a hollow portion corresponding to the shape of the molded product W.

In this CIP equipment, a mold 5 is attached to the upper end of the mandrel 4 and charged into the pressure vessel 1. After filling the mold 5 with powder 6 such as alumina or carbon as a raw material, the upper ram 3 is For example, 1000 kg/cm 2 is charged into the mold 5 and applied from outside the pressure vessel 1 to the outside of the pressing body ² .
By applying a certain amount of hydraulic pressure, the powder 6 in the mold 5 is pressed and molded by the compressive force.
After the molding is completed, the upper ram 3 is pulled upward, the mandrel 4 is raised, and the molded product W
is taken out above the pressure vessel 1.

By the way, in the above CIP equipment,
Depending on the size and shape of the molded product W to be manufactured, it is necessary to supply a certain amount of powder 6 into the mold 5, and for this reason, a powder metering and feeding device as shown in FIG. 5, for example, is provided. . The metering and feeding device shown in FIG. 5 has a metering block 8 movably disposed inside a rectangular cylinder 7, and a hopper 9 is connected to the upper surface of the cylinder 7 at approximately the center in the length direction. A powder inlet 10 is provided, and
A powder supply port 12 is provided on the lower surface of the tip side (left end side in FIG. 5) of the cylinder 7 to which a powder supply pipe 11 is connected for guiding the powder above the pressure vessel 1 of the CIP equipment. ing. As shown in FIG. 6, the weighing block 8 disposed inside the cylinder 7 has a powder storage section 13 having a predetermined internal volume formed at its front end, and a lever at its rear end. 14 is attached, and by pushing and pulling this lever 14, the measuring block 8 can be moved back and forth (left and right in FIG. 5) inside the cylinder 7.

In such a metering/feeding device, when the powder storage portion 13 of the metering block 8 and the input port 10 of the cylinder 7 are aligned as shown in FIG. Falling into the storage compartment 1
3 is filled with a certain amount of powder. Next, when the lever 14 is pushed to move the weighing block 8 forward and the storage section 13 and the supply port 12 are aligned as shown in FIG. At the same time, the powder filled in the storage section 13 is transferred from the supply port 12 to the supply pipe 11.
Therefore, a constant amount of powder, that is, the internal volume of the storage section 13 is always supplied to the pressure vessel 1 through the supply pipe 11.

However, in the above-mentioned metering and feeding device, when manufacturing other molded products with different sizes and shapes, it is necessary to use other measuring blocks manufactured so that the powder storage section 13 has a different size, that is, a different internal volume. 8 has the problem that it has to be replaced each time, and the replacement work is troublesome and the workability is not good, and an improvement has been desired.

``Means for Solving the Problems'' This idea was made in view of the above circumstances, and it is designed to move the measuring block, which is movably arranged inside the cylinder, to the main body block and to the main body block relative to the main body block. and a movable slide block, forming a powder storage section with a variable internal volume between the main body block and the slide block,
The present invention is also characterized in that it includes a screw feeding mechanism for moving the slide block relative to the main body block.

``Example'' An example of this invention will be described below in Figures 1 and 2.
This will be explained with reference to the figures.

FIG. 1 shows a schematic structure of the metering and feeding apparatus of this embodiment. In the figure, reference numeral 20 is a cylinder, and 21 is a metering block movably disposed within the cylinder 20. In FIG.

The cylinder 20 has a rectangular cylindrical shape similar to the cylinder 7 (see FIG. 5) in a conventional metering and feeding device, and has a powder inlet 23 connected to a hopper 22 on its upper surface, and a powder input port 23 at the tip. A powder supply port 25 is formed on the lower surface of the side to which a powder supply pipe 24 for introducing powder to the pressure vessel 1 of the CIP equipment (see FIG. 3) is connected.

Furthermore, as shown in FIGS. 1 and 2, the weighing block 21 is composed of a main body block 26 and a slide block 27.
7 is connected to the main body block 2 by the screw feeding mechanism 28.
It is possible to move relative to 6.

The main body block 26 has a notched groove 29 formed therein extending from the rear end surface to the distal end side and extending from the upper surface to the lower surface, and is concave in plan view, and the slide block 27 is inserted into the notched groove 29. It is disposed movably relative to the block 26, and the distal end surface 27a of the slide block 27
and the bottom surface 29a of the notch groove 29 of the main body block 26.
A powder storage section 30 in which powder is stored is formed between the two.

The screw feeding mechanism 28 for moving the slide block 27 includes a nut 31 fixed to the rear end surface of the main body block 26, and a nut 31 fixed to the rear end surface of the main body block 26.
The tip of the slide block 2 is screwed into the slide block 2.
7, and a handle 33 for rotating the screw rod 32. Then, when the screw rod 32 is rotated by the handle 33, the slide block 2
7 is screwed so that it moves relative to the main body block 26 (the moved state is shown by the two-dot chain line in FIG. 1A). The internal volume of the powder storage section 30 formed between the main body block 26 and the bottom surface 29a of the cutout groove 29 is changed. That is, the slide block 27
When moved forward to the left in Fig. 1, the storage section 30
The volume of the storage section 30 decreases, and when it is moved back to the right, the storage section 30
The volume of will increase.

Further, a bevel gear (bevel gear) 34 is attached to the middle part of the handle 33,
Bevel gear 3 meshing with this bevel gear 34
Although not shown, a dial gauge is attached to 5. The dial gauge displays the amount of movement of the slide block 27, which is determined by the amount of rotation of the handle 33, that is, the screw rod 32, and displays the amount of movement converted into the internal volume of the storage section 30. desirable.

Furthermore, an actuator 37 is attached to the tip of the cylinder 20 (left end in FIG. 1) via a mounting plate 36, and this actuator 37
The rod 38 of No. 7 is connected to the front end surface of the main body block 26 of the measuring block 21. By operating this actuator 37, the entire measuring block 21, that is, the main body block 26, the slide block 27, and the screw feeding mechanism 28, move together within the cylinder 20.

In FIG. 1, reference numeral 39 is a sealing member that seals between the metering block 21 and the inner surface of the cylinder 20.

To explain how to use the metering and feeding device having the above configuration, (i) First, while watching the dial gauge (not shown), rotate the handle 33 of the screw feeding mechanism 28 to move the slide block 27, and move the slide block 27 to the storage section 3.
Set the volume of 0 to the desired value.

(ii) Then, the entire measuring block 21 is moved back to the right in FIG. 1 by the actuator 37, so that the upper part of the storage section 30 and the input port 23 are aligned with each other as shown in FIG. 1A. As a result, powder is thrown into the storage section 30 from inside the hopper 22, and
A desired amount of powder is filled into the storage section 30.

(iii) Next, actuate the actuator 37 to move the entire metering block 21 forward to the left in FIG. 1, so that the lower part of the storage portion 30 and the supply port 25 are aligned as shown in FIG. 1B. This results in
The input port 23 is blocked by the upper surface of the slide block 27, and the powder filled in the storage section 30 falls from the supply port 25 into the supply pipe 24 and is led to the pressure vessel of the CIP equipment. , type 5
supplied within.

By doing this, when the same molded product is manufactured continuously, a constant amount of powder can always be supplied by repeating the steps () and () above. In addition, when it becomes necessary to change the amount of powder supplied in order to manufacture molded products of different shapes and sizes, the volume of the storage section 30 can be reset by following the steps in () above, and then () ,()
You can repeat the steps.

As described above, according to this metering and feeding device, when it is necessary to change the amount of powder supplied in order to manufacture a different molded product, the volume of the powder storage section 30 can be changed by moving the slide block 27. This can be accommodated by changing the measuring block, and therefore, there is no need to replace the measuring block each time as in conventional metering and feeding devices, and work efficiency can be greatly improved.

In addition, the slide block 27 is connected to the screw feeding mechanism 2.
8, the slide block 27 can be moved easily and reliably. Moreover, a dial gauge (not shown) for displaying the amount of movement of the slide block 27 is provided on the screw feeding mechanism 28. Because of this provision, it is possible to accurately set the internal volume of the storage portion to a desired value.

Note that the shape of the measuring block 21, that is, the shape of the main body block 26 and the slide block 27, is similar to that of the powder storage section 30 whose internal volume can be changed by moving the slide block 27.
is formed between them, appropriate changes can be made without being limited to the above embodiments. In addition, although the metering and feeding device in the above embodiment was used attached to the CIP equipment, the metering and feeding device of this invention can be used not only in the above but also in other press equipment or when metering is required when feeding powder. Of course, it can be widely adopted.

"Effects of the invention" As explained in detail above, according to this invention, the measuring block is composed of a main body block and a slide block, and a powder storage section with a variable internal volume is formed between them. When it is necessary to change the amount of powder supplied, this can be done simply by moving the slide block relative to the main block, which is different from conventional metering and feeding, which requires replacing the metering block each time. This has the effect that work efficiency can be greatly improved compared to other devices. Further, since the slide block is moved by the screw feeding mechanism, there is an advantage that the slide block can be moved easily and reliably.

[Brief explanation of the drawing]

FIGS. 1 and 2 are diagrams showing an embodiment of this invention. FIG. 1 is a cross-sectional view showing the schematic configuration of the metering and feeding device of this embodiment, in which A shows a state in which powder is put into the storage section, and B shows a state in which powder is supplied from the storage section. Each of the figures and FIG. 2 is a perspective view of a metering block in this metering and feeding device. Figure 3 is a schematic diagram of the CIP equipment;
The figure is a perspective view of a molded product formed by the CIP equipment, and Figure 5 is a sectional view showing the schematic configuration of a conventional metering and feeding device. , B are views showing the state in which powder is being supplied from the storage section, and FIG. 6 is a perspective view of the measuring block in this metering and feeding apparatus. 20...Cylinder, 21...Measuring block, 2
3...Powder input port, 25...Powder supply port, 26...
...Body block, 27...Slide block, 2
8...Screw feeding mechanism, 30...Powder storage section.

Claims (1)

[Scope of utility model registration request] A measuring block in which a powder storage section is formed is movably disposed in a cylinder having a powder inlet in the upper part and a powder supply inlet in the lower part. Aligning the opening with the powder storage section of the measuring block and charging the powder into the powder storage section, and moving the measuring block to align the supply port with the powder storage section. Accordingly, in the powder metering and feeding device configured to feed the powder filled in the powder storage portion through the supply port, the metering block has a main body block and a body block that is opposite to the main body block. a powder storage section having a variable internal volume is formed between the main body block and the slide block, and the slide block is moved relative to the main body block. 1. A powder metering and feeding device characterized by being equipped with a screw feeding mechanism for.