JPH055102A - Shoe box in powder compacting device - Google Patents

Abstract

PURPOSE:To clean the table of a powder compacting device and to increase workability by moving a shoe box back and forth on the table, sucking and recovering stock powder scattered on the table. CONSTITUTION:Slit-shaped suction holes 13 are pierced in the bottom of a shoe box 11 and a stock powder feeder 15 is connected to the holes 13 through a suction pipe 14. The shoe box 11 is moved back and forth on the table 8 of a powder compacting device and stock powder (a) scattered on the table 8 is sucked and recovered to clean the table 8. The wear of the felt 12 of the shoe box 11 is prevented and the quality of the shoe box 11 is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder molding apparatus for compacting a powder of metal or the like (raw material powder) by die molding or the like to mold molded articles such as various machine parts. The present invention relates to a shoe box used for supplying a raw material powder into a molding cavity for use.

[0002]

2. Description of the Related Art FIG. 8 shows an example of a general powder molding apparatus, in which a lower punch 2 is supported and fixed to a fixing table 3 below an upper punch 1 which is provided so as to be vertically movable. A holding plate 5 for holding the die 4 is provided between the upper and lower punches 1.2. A guide rod 6 that extends slidably through the fixed table 3 is provided on the lower surface of the holding plate 5, and the lower end of the guide rod 6 is a lower table 7 that is vertically movable by a drive device (not shown). The upper table 8 fixed to the holding table 5 and flush with the holding plate 5 has a raw material powder feeding device 9 including a hopper on the upper portion.
To the die 4, which is connected to the end of a rod 20 which is horizontally reciprocally driven by a driving device such as an air cylinder (not shown). There is. Then, the shoe box 11 containing the raw material powder a is advanced to move the die 4
After filling the raw material powder a therein, the shoe box 11 is retracted, then the upper punch 1 is lowered to compression-mold the raw material powder a in the die 4, and then the holding plate 5 is lowered.
By repeating the process of pushing up the compact b with the lower punch 2, the compacts b can be successively shaped and finished.

[0003]

By the way, when the shoe box 11 reciprocates between the upper table 8 and the holding plate 5, the raw material powder a leaks out of the shoe box 11 and the upper table 8 and It is scattered outside the moving range of the shoe box 11 on the holding plate 5, and is normally not collected but treated as waste. In general, as shown in FIG. 8, a felt 12 is integrally formed on the contact surface between the upper table 8 at the lower end of the shoe box 11 and the holding plate 5, so that not only smooth sliding between the holding plate 5 and the like but also the raw material can be achieved. It seems that it is designed to prevent the powder a from leaking out, but in the case of the shoe box 11 that reciprocates at high speed in order to mass-produce a large number of molded products, the wear of the felt 12 remarkably prevents the leakage completely. It was impossible to do so, and the fine raw material powder a was leaked to some extent, and the disposal was considered an unavoidable loss. However, depending on the type of metal, the raw material powder a is often quite expensive, so that the raw material loss is large and the wear rate of the felt 12 is generally relatively high. Therefore, the raw material powder a leaks and the leaked raw material a. It has been desired to solve the conventional technical problems that had to be discarded without being able to collect the powder a.

The present invention is intended to solve such problems, and provides a shoe box capable of not only suppressing the leakage of the raw material powder to the outside of the shoe box but also recovering the leaked raw material powder. The purpose is to provide.

[0005]

In order to achieve the above object, the shoe box in the powder molding apparatus of the present invention comprises:
A suction port provided at the bottom of the shoe box and in the vicinity thereof, and a raw material powder suction device connected to the suction port via a suction pipe. Further, the raw material powder suction device is equipped with suction stopping means.

[0006]

The raw material powder scattered on the table is absorbed through the suction port, and is collected by the raw material powder suction device through the suction pipe. Further, the shoe box stops on the die, and while the raw material powder is being filled in the die, the suction stopping means is operated to stop the suction of the raw material powder.

[0007]

1 to 7 show first to fourth embodiments of a shoe box 11 in a powder molding apparatus according to the present invention. In these figures, the same elements as those shown in FIG. 8 are used. Will be described with the same reference numerals, and overlapping portions will be omitted.

First, a first embodiment of the present invention will be described with reference to FIGS.
Will be described. In FIG. 1, shoe box 1
1. A slit-shaped suction port 13 is formed along the longitudinal direction of the bottom portion 11A of No. 1 and a suction pipe 14 is connected to the back of the suction port 13 so that the end of the suction pipe 14 is a raw powder suction device such as a vacuum system. Connect to 15. The suction port 13 is provided in the longitudinal direction on the outer peripheral side of the bottom of the shoe box 11, and the cross-sectional shape of the upper part is a circular groove and the lower part is a long groove, and the felt 12 is formed along the inner peripheral edge of the bottom of the shoe box 11. Moreover, a gap for introducing the sucked raw material powder is formed between the suction port 13 and the surface of the upper table 8 by the height of the felt 12. In the first embodiment, the shoe box 11 is supplied with the raw material powder a from the raw material powder supply device 9 through the supply pipe 10, and moves on the upper table 8 in a state where the raw material powder a is stored until it reaches the die 4. In the meantime, and after the raw material powder a is filled in the die 4, the raw material powder suction device 15 is operated until the raw material powder a is retreated from the die 4 and returned to the original position while moving on the upper table 8. The raw material powder a leaked to the suction box 15 is sucked into the bottom of the shoe box 11 through the suction port 13 of the felt 12, and is collected in the suction device 15 through the suction pipe 14. However, since the shoe box 11 may stop on the die 4 and the raw material powder a in the shoe box 11 may be sucked while the raw material powder a is being filled in the die 4, the suction is stopped. , Is configured not to suck. The suction stopping means of the suction device 15 stops the driving of the suction device 15 by the timer means 21, or sets the switching valve 22 to the suction device 15 or the suction pipe 1 while the suction device 15 is driven.
4, the switching valve is closed to prevent suction.

FIG. 4 shows a second embodiment of the present invention. In FIG. 4, a felt 12 formed along the entire bottom 11A of the shoe box 11 is vertically cut to form a slit-shaped suction port 13. Then, the raw material powder a leaked onto the upper table 8 is sucked and collected by the raw material powder suction device 15 composed of the vacuum system shown in the first embodiment. In this case, since the suction port 13 is sandwiched by the felt 12, it moves from the original position to the die 4 and is returned to the upper position by the suction device 15 from the suction port 13 until it returns.
The raw material powder leaked above is collected by suction. However, when the shoe box 11 is stopped on the die 4, the suction operation by the suction device 15 is stopped so that the raw material powder a stored in the shoe box 11 is not sucked. The structures of the suction device 15 and its suction stopping means (switching valve) 22 are the same as those shown in FIG. 1 and the first embodiment.

FIG. 5 shows a third embodiment of the present invention, in which one or both shoe boxes 11 have suction ports 13 on the outer bottom side.
The suction pipe 17 equipped with the
7 is connected to the end of the suction pipe 14 connected to the suction device 15 at the rear portion. While the shoe box 11 reciprocates on the upper table 8, the suction device 15 is operated to suck and collect the raw material powder a leaked from the suction port 13 onto the upper table 8. In this case, since the felt 12 is provided on the entire bottom of the shoe box 11, the felt 12 is configured to suck and recover during the reciprocating motion. The structures of the suction device 15 and its suction stopping means (switching valve) 22 are the same as those shown in FIG. 1 and the first embodiment.

FIG. 6 and FIG. 7 show a fourth embodiment of the present invention, in which a suction port 1 is formed of a large number of small holes so as to surround the outer circumference of a felt 12 provided on the bottom 11A of the shoe box 11.
8 are provided, and the small holes 18 are communicated with each other by a suction passageway 19 inside the shoe box 11, and the proper position of the suction passageway 19 on the rear side of the shoe box 11 and the end portion of the suction pipe 14 are connected to each other. The other end of the pipe 14 is also connected to the raw material powder suction device 15. According to this example, as in the case of the first embodiment, the shoe box 11 is supplied with the raw material powder a from the raw material powder supply device 9 via the supply pipe 10, and then moves on the upper table 8 to move the die 4 to the die 4. Reach the top and die 4
After the raw material powder a is filled in the inside, the raw material powder a leaked and scattered on the upper table 8 is sucked and collected until it is retracted from the die 4 and returned to the original position, but the shoe box 11 is stopped on the die 4. The die 4 is not sucked while the raw material powder a is being filled. The structures of the suction device 15 and its suction stopping means (switching valve) 22 are the same as those shown in FIG. 1 and the first embodiment.

As described above, in the first to fourth embodiments, the raw material powder a leaked from the shoe box 11 and scattered on the upper table 8 or the like is sucked through the suction port 13 without being discarded, and is sucked. Can be collected in the device 15,
The raw material powder a can be removed without being scattered on the upper table 8 and the holding plate 5. Further, the scattered raw material powder a is transferred to the felt 1 while the shoe box 11 is moving.
It will not be caught between 2 and the upper table 8 and damage the felt 12 or the upper table 8 surface. Further, it is possible to prevent the raw material powder a filled in the shoe box 11 from being sucked by mistake, and thus it is possible to provide a highly reliable raw material powder collecting apparatus.

The present invention is not limited to the above embodiment, and various modifications can be made. For example,
In the above-described embodiment, the raw material powder suction device 9 is provided separately and the raw material powder a is collected from the suction port 13 via the suction pipe 14. However, the suction pipe 14 is directly connected to the raw material powder supply device 9 or the supply pipe 10. The raw material powder sucked from the suction port 13 may be directly returned to the raw material powder supply apparatus 9 by connecting the suction apparatus 15 to the raw material powder supply apparatus 9. Further, by changing the position of the rod 20 to change the path through which the shoe box 11 reciprocates, it is possible to collect the raw material powder that has leaked out of the normal path.

[0014]

The present invention is provided with a suction port provided at the bottom of the shoe box and its vicinity, and a raw material powder suction device connected to the suction port via a suction pipe. The raw material powder leaked from the table and scattered on the table can be sucked and collected during the normal work process of the shoe box, and the table can be kept clean at all times, and the bottom of the shoe box or It is possible to prevent the felt and the table surface from being scratched or abraded, and the recovered raw material powder can be returned to the supply device to be used again, thereby improving the economical efficiency.
Further, since the shoe box is stopped on the die by providing the suction device with the suction stopping means and the suction is stopped while the raw material powder is being filled, the raw material powder in the shoe box is erroneously sucked. There is no such thing.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is an oblique sectional view showing a first embodiment of the present invention.

FIG. 3 is a bottom view showing the first embodiment of the present invention.

FIG. 4 is an oblique sectional view showing a second embodiment of the present invention.

FIG. 5 is an oblique sectional view showing a third embodiment of the present invention.

FIG. 6 is an oblique sectional view showing a fourth embodiment of the present invention.

FIG. 7 is a bottom view showing the fourth embodiment of the present invention.

FIG. 8 is a schematic explanatory view showing a general powder molding apparatus.

[Explanation of symbols]

 1 Upper Punch 4 Die 8 Upper Table 11 Shoe Box 13 Suction Port 14 Suction Pipe 15 Raw Material Powder Suction Device

Claims (1)

Claims: 1. A shoe box containing the raw material powder is moved forward to fill the raw material powder in the die, and then the shoe box is retracted and the upper punch is lowered to move the raw material powder in the die. A powder molding apparatus for compression molding, comprising: a suction port provided at the bottom of the shoe box and in the vicinity thereof; and a raw material powder suction device connected to the suction port via a suction pipe. Shoe box in molding equipment. 2. A powder molding apparatus for advancing a shoe box containing a raw material powder to fill the raw material powder in a die, retracting the shoe box, and lowering an upper punch to compression-form the raw material powder in the die. 2. A shoe box in a powder molding apparatus, wherein the raw material powder suction device is provided with suction stopping means.