JPH0318078Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a visualization device for the powder compression process, which allows the movement of powder to be directly observed during the powder compression molding process.

(Prior Art) When compressing powder to obtain a product, defects such as cracks may occur during the compression process. One of the reasons for this is considered to be non-uniform compression of each part or deviation in relative position during compression. Therefore, in order to obtain a molded body of good quality, it is necessary to know the movement of the powder during powder compression.

(Problem that the invention aims to solve) However, in the past, it was difficult to directly observe the movement of powder during compression, so colored powder was packed in a layer, and after compression, it was cut and observed. However, there were problems such as the inability to directly observe the process from the filling state to the end of compression, and the need for many molds and time to understand the movement of powder in various shapes. It was hot. The present invention aims to solve these problems.

(Means for Solving the Problems) In order to solve the above problems, the present invention has a structure in which the front part of the die supported by a support member having a cylinder is
A hard glass plate was arranged and attached to a frame-shaped cover so that the inside of the cavity could be observed, and upper and lower punches were provided inside the glass plate to compress and mold the powder filled in the cavity. It is something.

(Function) With this configuration, the movement of the upper and lower punches can be directly observed inside the cavity from a direction perpendicular to the direction of movement of the upper and lower punches through the hard glass plate attached to the frame-shaped cover. Therefore, it is possible to observe the sliding condition and powder flow condition of punches of different shapes and division states, and also directly observe variations in powder density that occur during molding. You will be able to do that. Moreover, it is possible to directly and easily observe the movement of powder continuously from the filling state to the end of compression for parts of various shapes.

(Embodiment) Next, an embodiment of the present invention will be explained with reference to FIGS. It is supported by a support member consisting of a protruding rod 5 that moves up and down. A hard glass plate 7 is disposed at the front of the die 1 so that the inside of a cavity 6 located at the center thereof can be observed, and is attached by a frame-shaped cover 8 and bolts 9. 10 is an upper punch, and 11 is a lower punch. The lower punch 11 is divided into two parts, and is a model of the cross-sectional shape of an actual part. In addition to being divided into two, the lower punch 11 can be divided into shapes and numbers according to the cross-sectional shape of the actual part. In addition to the die 1, the lower punch 11 is also supported by a cylinder 12 and a rod 13 that protrudes from the cylinder 12 and moves up and down so that the molding conditions can be reproduced as the actual parts. Since the cylinders 4 and 12 are used to float what they support during the compression process, they can be replaced with springs. At the top of the holder 3, there is a stopper 14 for regulating the movement of the lower punch 11.
is placed. This stopper 14 can be easily replaced depending on the shape of the product.

This device thus constructed is used as follows. That is, cavity 6 (see Figure 3)
As shown in FIG. 1, powder 15 and a powder band 16 colored in a color that is clearly distinguishable from the color of powder 15 are filled into the inside of the powder 15 in a layered manner, and then the upper punch 10 is lowered. , a process similar to normal powder compression molding is performed on the powder 15 and the powder band 16. This process and the final compression state shown in FIG. 4 can be visually observed through the glass plate 7. In FIG. 5, the die 1 supported by the rod 5 has been rotated through 90 degrees about the shaft 17 (see FIG. 1) and brought into a horizontal position. In this way, the powder 15 and the powder band 16
can be easily formed.

(Effects of the invention) Since the present invention is configured as explained above, it has the following effects.

Through the hard glass plate attached to the frame-shaped cover, the movement of the upper and lower punches can be directly observed inside the cavity from a direction perpendicular to the direction of movement. It is possible to observe the sliding condition and powder flow condition of punches with different division conditions, and it is also possible to directly observe variations in powder density that occur during compaction.

The movement of powder during the compression process can be directly observed continuously from the filling state to the completion of compression.

Even if the shape changes, it can be easily accommodated by replacing the modeled punch and stopper.

By knowing the movement of powder during the compression process, it is possible to set molding conditions that will not cause defects and to confirm countermeasures, making it possible to obtain a molded product of good quality.

[Brief explanation of the drawing]

FIG. 1 is a front view of the visualization device according to the present invention, FIG. 2 is a side view of the visualization device shown in FIG. 1, partially in cross section,
Fig. 3 is a plan view of a part of Fig. 1, Fig. 4 is a front view of a part of Fig. 1 showing the completed compression state, and Fig. 5 is a partial plan view of Fig. 1.
This figure is a side view showing a state in which a part of the apparatus shown in FIG. 1 has been changed in attitude. 1...Die, 2...Base, 3...Holder, 4
... Cylinder, 5 ... Rod, 6 ... Cavity, 7 ... Glass plate, 10 ... Upper punch, 11 ...
...lower punch.

Claims (1)

[Scope of utility model registration request] A hard glass plate is installed on the front part of the die supported by a support member having a cylinder so that the inside of the cavity can be observed, and is attached to a frame-shaped cover, and the cavity is filled inside the glass plate. A device for making the powder compression process visible, characterized by being provided with upper and lower punches for compression molding the powder.