JPH0512103U - Powder molding equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a feeder for a box-shaped powder molding apparatus, which eliminates the difference in the powder supply amount to the die and can obtain a uniform powder compact. [Composition] A powder molding apparatus configured by a die die 9, an upper punch, a lower punch 10 and a feeder 1 for molding a powder 8, and an upper lid of the feeder 1 having an opening tube 7 for a box-shaped powder molding apparatus. 2 air suction hoses 6 at both ends
A powder molding apparatus having a feeder for a box-shaped powder molding apparatus provided with an air suction port 4 which is interlocked with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a powder molding apparatus for molding powder of magnetic ferrite / dielectric or piezoelectric ceramics, and more particularly to a feeder for supplying powder to a die for powder molding.

[0002]

[Prior Art]

 As shown in FIG. 2, the conventional powder molding device is roughly divided into a mold 1 for supplying powder 8 to a mold die 9, a feeder 1 for filling, and a mold die 9 for compressing and molding the filled powder 8 and an upper die 8. It is composed of a punch and a lower punch 10. A feeder 1 for a conventional powder molding apparatus installed on a mold die 9 shown in FIGS. 2 (a) and 2 (b) includes an opening tube 7 for powder supply to an upper lid 2 and a mold to a lower end. A space 11 formed by the die 9 and the lower punch 10 has a lower end opening 3 for supplying and filling powder. The feeder 1, which is connected to the upper punch, moves back and forth on the die die 9 in conjunction with the vertical movement of the upper punch, and moves above the space 11 formed by the die die 9 and the lower punch 10. When the feeder 1 is located, the powder 8 retained in the feeder 1 is supplied to and filled in the space 11.

[0003]

[Problems to be solved by the device]

 In the conventional powder molding apparatus using the feeder, the powder flowing through the powder supply opening tube 7 is apt to cause a powder jam or a bridging phenomenon, and the same phenomenon is observed even in the feeder. Furthermore, if the powder and the air in the die are not easily replaced, and if there is no escape area for the air, the clogging will worsen and the powder supply will fluctuate, resulting in variations in the size and weight of the green compact. There was a problem that occurred. In order to eliminate and solve the above problems, the present invention improves the feeder for a box-shaped powder molding machine to eliminate the difference in the powder supply amount to the die and to obtain a uniform powder compact. The purpose is to supply a feeder for a box-shaped powder molding machine.

[0004]

[Means for Solving the Problems]

 That is, the present invention is a powder molding apparatus for forming powder by forming a die, an upper punch, a lower punch, and a powder, and a box provided with several air suction ports at both ends of an upper lid of a feeder for a box-shaped powder molding apparatus. The powder molding apparatus is characterized by having a feeder for the powdery powder molding apparatus.

[0005]

[Action]

 The feeder for the box-shaped powder molding machine, which has an air suction port on the upper lid of the feeder, moves forward and backward for each pressing operation of the box-shaped powder molding machine as shown by the arrow in Fig. 1, The die 9 is filled with the powder 8, but the powder 8 filled from the powder supply opening to the lower end opening 3 does not fall naturally when the die 9 is filled, but the powder 8 in the die Since the air is discharged to the outside of the feeder for the box-shaped powder molding machine through the air suction port, the air in the mold die is replaced with powder in a very rational manner, and there is no escape place for the air. Will be replaced successfully. Since the volume of the space 11 formed by the die die 9 and the lower punch 10 is the same as the volume discharged to the outside of the feeder 1 for the box-shaped powder molding apparatus, the powder and the air can be replaced very smoothly. And the filling will be successful, and factors such as air entrapment and upset dimensions will be eliminated. In this way, the volume of the die die space and the air discharged to the outside of the feeder are made equal, and powder filling is rationally performed.

[0006]

【Example】

 Examples will be described with reference to the drawings. 1A and 1B are sectional views showing the structure of a feeder of a powder molding apparatus of the present invention. FIG. 1A is a front sectional view and FIG. 1B is a side view. In FIG. 1, a feeder 1 installed on a mold die 9 supplies powder to an opening tube 7 for powder supply to an upper lid 2 and a space 11 formed by a mold die 9 and a lower punch 10 at a lower end. It has a lower end opening 3 for filling. A cylindrical air suction port 4 is attached to the upper lid 2, and a filter 5 is attached to the tip end portion thereof, and an air suction hose 6 is attached to the air suction port 4. During powder molding, the powder is supplied to the die from the powder-supplying opening tube 7 into the feeder for the box-like powder molding machine, and then the feeder advances to the die 9 and the inside of the feeder. Powder is fed into the die. At this time, the volume of air discharged from the air suction port 4 is adjusted so as to be the same as the space 11 in the die. As a result, there is no powder clogging or bridging in the feeder, and the powder supply amount is constant.As a result, variations in the powder supply amount to the die die are reduced, and the molding dimensions after molding into a green compact are reduced. The variation in density is extremely small. The dimensional variation of the powder compact molded by the feeder for the box-shaped powder molding device of the present invention is approximately the same as the dimensional variation of the powder compact when the feeder for the conventional box-shaped powder molding device is used. It could be reduced by about 30%.

[0007]

[Effect of the device]

 As described above, the present invention provides a powder molding apparatus for molding powder with little variation in powder filling by using a feeder for a box-shaped powder molding apparatus provided with a forced air suction port in the powder molding apparatus. can do.

[Brief description of drawings]

1 is a front sectional view showing the structure of a feeder of a powder molding apparatus of the present invention, FIG. 1 (a) is a front sectional view, and FIG. 1 (b) is a side view.

2A and 2B are front sectional views showing a structure of a feeder of a conventional powder molding apparatus, wherein FIG. 2A is a front sectional view and FIG. 2B is a side view.

[Explanation of symbols]

 1 Feeder 2 Upper Lid 3 Lower End Opening 4 Air Suction Port 5 Filter 6 Air Suction Hose 7 Opening Tube 8 Powder 9 Mold Die 10 Lower Punch 11 Space

Claims (1)

[Scope of utility model registration request] 1. A box-shaped powder molding apparatus in which a plurality of air suction ports are provided at both ends of an upper lid of a feeder for a box-shaped powder molding apparatus in powder molding that basically combines an upper punch, a lower punch, a die and a feeder. A powder molding apparatus having a feeder for use.