KR20140144427A - Apparatus for compression molding powder that manufactures electrode of thermal battery - Google Patents

Abstract

The purpose of the present invention is to provide a compression molding apparatus for a powder to manufacture a thermal battery electrode capable of realizing a high-precision cavity even though an ordinary press equipment is used; and is capable of reducing tact time, prevent leakage, and the non-uniformity of the internal particles of the powder by excluding an underfill process by having an upper punch greater than the shape of the electrode, thereby stably manufacturing the electrode. To accomplish the above purpose, provided is a compression molding apparatus for a powder to manufacture a thermal battery electrode, which comprises: a die (110), an upper punch (130), a lower punch (120), a die vertical position adjusting part, and a die supporting elastic body. The die supporting elastic body installed between the die (110) and the lower punch (120) supports the die (110) such that a predetermined distance can be maintained to allow a vertical through-hole (111) to form a cavity filled with the powder to manufacture the electrode. The upper punch (130) formed to be greater than the vertical through-hole (111) performs the compression molding of the powder when descending to apply a compressive force to the die (110) covering the vertical through-hole (111) filled with the powder to manufacture the electrode, wherein the compressive force exceeds the elastic supporting force of the die supporting elastic body. The die vertical position adjusting part adjusts the die (110) to descend such that the electrode compression-molded by the compressive force due to the descending of the upper punch (130) can be extracted from the lower punch (120) when the upper punch (130) ascends again. After the compression-molded electrode is extracted, the die vertical position adjusting part adjusts the die (110) to ascend to remove the compressive force applied to the die (110) such that the die supporting elastic body can allow the vertical through-hole (111) to form the cavity filled with the powder to manufacture the electrode.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a compression molding apparatus,

The present invention relates to compression molding of a powder for the production of a thermoelectric electrode, and more particularly to compression molding of a powder for the production of a thermoelectric electrode for compression-molding a powder for producing electrodes such as an anode and a cathode, .

Generally, a thermal battery is a solid electrolyte which does not have an ionic conductivity at room temperature and is liquefied by a chemical exothermic material in a short time of 1 second or less to have high ion conductivity, thereby providing high output in a relatively short time A primary battery is a primary battery which is manufactured by connecting a unit cell of pellet composed of cathodes, electrolytes, anodes, heat sources and current collectors in series or in parallel in order to realize required output voltage.

This thermal battery is stored in a state of no activity of the battery at room temperature. When it receives heat of 300 ~ 500 ℃, it activates the solid electrolyte which is inserted between the cathode and the anode and has no ion conductivity. The device is operated to ignite a heat source in a unit cell. The cell performs a function of a battery that dissipates a solid electrolyte from heat generated to generate an electromotive force while supplying power. During storage, It has excellent safety for a long period of more than 10 years because it is solid without solid state and maintenance and repairing activities are almost unnecessary. Since it is hardly affected by acceleration, vibration and impact after operation, Military weapons such as cannonballs, mines, etc., emergency facilities for large buildings, power plants, etc. It has been used.

Here, the raw material of the electrode, which is a constituent of the thermocyte, is a powder mixture of a highly active powder such as a lithium alloy or a disulfide and a eutectic salt, and is selected so as to cause an electrochemical reaction in a stable state at a temperature of about 500 ° C or higher.

Since the electrochemical reaction of thermocells occurs at a high temperature, an organic binder to be added to the raw material can not be used for the purpose of improving the moldability in the compression molding process of the powder.

Therefore, in order to produce a thin disc-shaped electrode without an organic binder, a high molding load is required, and as a result, the formed electrode is easily broken even by a small structural defect due to a high springback. Therefore, Handling is required.

Furthermore, the material of the electrode, which is a component of the thermocouple, is relatively light, which causes the cavity to flow out of the die due to the pressure generated in the process of inserting the upper punch, resulting in a problem that normal molding becomes impossible.

In order to solve such a problem, a conventional thermoelectric electrode forming process using an underfill process has been proposed.

Figs. 1A to 1C show a conventional thermoelectric-electrode forming process.

A conventional compression molding apparatus for a powder for manufacturing a thermoelectric electrode is provided with a die 10 having electrode upper and lower through holes, a lower punch 20 inserted into the upper and lower through holes so as to be movable up and down, And the upper and lower through holes are formed between the lower punch 20 and the upper punch 30 so as to form a cavity for filling the powder for electrode production, The die 10 is lowered to adjust the die 10 so as to raise the die 10 so that the compression molded electrode is taken out by the pressing force applied to the cavity by the lowering of the upper punch 30 And an adjustment unit.

1A to 1C, the force applied to the upper punch 30 and the die 10 by a press (not shown) is indicated by an up and down arrows, and the position of the die is vertically adjusted The force of the press applied to the die 10 is replaced by an arrow and its direction.

First, as shown in Fig. 1A, the position of the die 10 is shifted upward in the die up-and-down position adjusting section to fill the powder for electrode production between the upper and lower through holes of the electrode shape and the lower punch 120 A cavity is formed, and powder is filled therein.

Next, as shown in FIG. 1B, in order to perform the underfill process, the position of the die 10 is moved upward in the die up-and-down position adjustment unit to expand the cavity so as to be higher in height than the charged powder.

With the cavity extended upward, the upper punch 30 is lowered and inserted into the upper and lower through holes of the die 10, and the powder filled in the cavity is compression-molded.

1C, in order to take out the compression-molded electrode, the position of the die 10 is moved downward by the die up-and-down position adjustment unit so that the electrode is lower than the height of the compression-molded electrode, 20). The electrode exposed on the lower punch 20 is taken out to the outside after the upper punch 30 is raised.

Thereafter, the die 10 is moved upward by the die vertical position adjusting section to form a cavity in which powder for electrode production is filled, as shown in Fig. 1A.

However, in the conventional compression-molding apparatus for a powder for producing a thermal battery electrode, since the underfill process is performed, the operation configuration of the press is complicated, and additional measurement is required to accurately control the depth of the cavity. And the cost increases.

The powder in the die 10 can be prevented from flowing out to the outside during the compression molding while the upper punch 30 descends through the underfill process. However, when the upper punch 130 is lowered, It is inevitable that the charging state of the powder can not be made uniform due to the air flow.

As a result, breakage of all or part of the compression-molded electrode may occur, which has been a cause of a high defect rate in the process of manufacturing the thermocouple electrode.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a pneumatic tire capable of realizing a high-precision cavity while using general press equipment, And it is an object of the present invention to provide a compression molding apparatus for powder for the production of a thermoelectric electrode which is capable of stable fabrication by preventing unevenness.

In order to achieve the above object, the present invention is characterized by comprising: a die having upper and lower through-holes in an electrode shape; A lower punch inserted into the upper and lower through holes movably up and down; An upper punch insertable into the upper and lower through holes; And the upper and lower through holes are formed between the lower punch and the lower punch to form a cavity for filling powder for electrode production, and when the compression molding is performed after powder filling in the cavity, the die is raised, And a die up-and-down position adjusting unit that adjusts the die to be lowered so that the compression-molded electrode is taken out by a pressing force applied to the cavity by the fall of the upper punch, wherein the die 110 and lower punch 120 to support the upper and lower through holes 111 so as to form a cavity for filling the powder for electrode manufacture so as to maintain a predetermined gap therebetween, The upper punch 130 is formed to be larger than the upper and lower through holes 111. The upper punch 130 is lowered and the upper and lower pipes The upper and lower position adjusting portions of the die 110 apply compression force to the die 110 covering the through hole 111 by applying a pressing force exceeding the elastic supporting force of the die supporting elastic body, The die 110 is lowered so that the upper punch 130 is lifted up again from the lower punch 120 by the pressing force generated by the lowering of the die 130, The die 110 is elevated to remove the pressing force applied to the die 110 by the die supporting elastic member to form a cavity for filling the powder for electrode manufacture in the upper and lower through holes 111 And a compression molding device for powder for the production of a thermoelectric electrode.

Preferably, the die holding elastic body may further include a horizontal holding and cavity space adjusting unit for horizontally maintaining a predetermined interval between the lower punch 120 and the die 110 and adjusting the cavity space have.

According to the compression molding apparatus for a thermoelectric-power-generating electrode of the present invention having the above-described configuration, the outflow of the electrode powder raw material in the die can be prevented without performing the underfill process, and since the upper punch is not inserted into the cavity, The generation of the internal pressure is minimized, and the electrode powder material in the cavity is maintained in a charged state, so that uniform pressurization can be achieved.

Further, according to the compression molding apparatus for a thermoelectric-power-generating powder of the present invention having the above-described configuration, since no underfill process is required, it is possible to eliminate the additional cylinder requirement of the press for realizing the underfill process, It is possible to control the top dead center and the bottom dead center without controlling the underfill process, so that the molding process can be performed by only the stopper control method without special position control.

Further, according to the compression molding apparatus for a thermoelectric-power-electrode for use in the present invention having the above-described configuration, it is not necessary to precisely control the lowering speed of the upper punch and the filling of the raw material powder to minimize the flow of powder due to internal air flow , An increase in the punching speed of the upper punch, and a simplification of the raw material powder filling process.

Further, according to the compression molding apparatus for a thermoelectric-electrode production tool of the present invention having the above-described configuration, when a thermoelectric-electrode molded article is manufactured, a uniform pressing force is applied to improve the structural stability of the electrode, .

Figs. 1A to 1C show a conventional thermoelectric-electrode forming process,
Fig. 2 shows a compression molding apparatus for a powder for producing a thermoelectric element according to an embodiment of the present invention,
Figures 3a and 3b show AA and BB cross-sections in the apparatus of Figure 2,
4A to 4C illustrate a compression molding process of a powder for manufacturing a thermoelectric electrode according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be described in detail in order to facilitate a person skilled in the art to which the present invention belongs. And does not mean that the technical idea and scope of the present invention are limited.

Fig. 2 shows a compression molding apparatus for a powder for manufacturing a thermoelectric-current electrode according to an embodiment of the present invention, and Figs. 3a and 3b show cross-sections taken along line A-A and B-B in Fig.

2 to 3B, the compression molding apparatus for a thermoelectric-power-generating powder according to an embodiment of the present invention includes a die 110, a lower punch 120, an upper punch 130, A die support spring 140 as a die support elastic member, a bolt 150 for horizontal holding and cavity adjustment as a horizontal holding and cavity adjusting unit, and a die up and down position adjusting unit.

The die 110 has a plurality of electrode-shaped upper and lower through holes 111 at the center, and a plurality of holes are formed to horizontally hold the left and right sides and to insert and receive the bolt 150 for adjusting the cavity.

The lower punch 120 is inserted into the upper and lower through holes 111 so as to be movable up and down, and is supported from the bottom by the lower punch fixed receiving portion 121 at the lower portion.

The upper punch 130 is formed to be larger than the upper and lower through holes 111. The lower and upper through holes 111 are filled with powder for electrode production, A pressing force exceeding the elastic supporting force of the die support spring 140 is applied to the die 110 covering the die 100 to perform compression molding of the powder.

The die support spring 140 is installed between the lower punch 120 and the die 110 so that the upper and lower through holes 111 are formed in the die 100 so as to form a cavity for filling the powder for electrode production, (110).

The horizontal holding and cavity adjusting bolts 150 are installed to pass through the inside of the die support springs 140 and maintain a horizontal position between the lower punch 120 and the die 110, Adjust the space higher or lower.

The die up-and-down position adjustment unit is configured to adjust the position of the upper and lower through holes 111 when the upper and lower through holes 111 are formed between the lower punch 120 and the lower punch 120 to form a cavity for filling the powder for electrode production, The upper punch 130 is lifted up and the die is lifted up to the position where the die support spring 140 is supported by the elastic force of the die support spring 140, The lowering of the die 110 is adjusted to take out the molded electrode.

The operation of the compression molding apparatus for a thermoelectric-electrode-producing powder according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

4A to 4C illustrate a compression molding process of a powder for manufacturing a thermoelectric electrode according to an embodiment of the present invention.

4A to 4C, the force applied to the die 110 and the upper punch 130 by the press (not shown) is indicated by the up and down arrows, and the position of the die 110 in the die up- The force of the press applied to the die 10 is replaced by the arrow and the direction thereof, not shown in the upper and lower parts.

First, the horizontal holding and cavity space adjusting bolts 150 located inside the die supporting springs 140 are vertically adjusted to hold the dies 110 resiliently supported by the die supporting springs 140 in a horizontal state After the height of the cavity is formed to be suitable for electrode fabrication, as shown in Fig. 4A, the electrode raw material powder is filled in the formed cavity and the upper punch 30 descends immediately without underfilling, Unlike the case of being inserted into the upper and lower through holes of the electrode shape of the die 10, the outer peripheral portion of the die 110 is pressed.

4B, the upper punch 30, which has been pressing the outer portion of the die 110, is lowered again to simultaneously press the die 110 and the powder filled in the cavity, while compressing the powder Molding is performed.

At this time, since the pressing force exceeding the elastic supporting force of the die supporting spring 140 is applied to the powder as the electrode raw material, the die 110 which has been supported by the die supporting spring 140 moves downward together with the pressure of the upper punch 130 And the die support spring 140 is kept pressed down by a height required for molding.

Then, as shown in FIG. 4C, in order to take out the compression-molded electrode, the position of the die 10 is moved downward in the die up-and-down position adjustment unit so that the electrode becomes lower than the height of the compression- 20). The electrode exposed on the lower punch 20 is taken out to the outside after the upper punch 30 is raised.

When the force applied to the die 110 is removed by the operation of the position adjusting portion of the die 110 after the molded product is taken out, the die 110 is rotated by the elastic restoring force of the die supporting spring 1400 as shown in Fig. And returns to the position where the cavity is formed so as to enable the first filling with the punch 120.

Therefore, in the compression molding apparatus for powder for the production of a thermal electrode according to the embodiment of the present invention, since the underfill process is not applied, the device configuration and process are simplified and the upper punch is not inserted into the cavity, The generation of the electrode powder is maintained in a charged state in the cavity, and the structural stability of the electrode is improved by the uniform pressure molding, thereby improving the efficiency of the process and the performance of the thermal battery.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims, and such modifications are also included in the scope of the invention.

100: a compression molding device for powder for producing a thermoelectric electrode according to an embodiment of the present invention
110: die
111: Upper and lower through holes
120: Lower punch
121: Lower punch fixed base
130: upper punch
140: die support spring
150: Bolts for leveling and adjusting cavities

Claims (2)

A die having upper and lower through-holes in an electrode shape;
A lower punch inserted into the upper and lower through holes movably up and down;
An upper punch insertable into the upper and lower through holes; And
Wherein the upper and lower through holes are formed between the lower punch and the lower punch so as to form a cavity for filling the powder for electrode production, and when the compression molding is performed after filling the powder in the cavity, the die is raised, And a die up-and-down position adjusting unit for adjusting the die so as to lower the die so that the compression-molded electrode is taken out by the pressing force applied to the cavity by the falling of the die,
And a die-supporting elastic body provided between the die 110 and the lower punch 120 to support the upper and lower through holes 111 so as to form a cavity for filling the powder for electrode manufacturing so as to maintain a predetermined gap therebetween ≪ / RTI &
The upper punch 130 is formed to be larger than the upper and lower through holes 111,
A pressing force exceeding the elastic supporting force of the die supporting elastic body is applied to the die 110 covering the upper and lower through holes 111 in which the upper punch 130 is lowered and powder for electrode manufacturing is filled, Compression molding is performed,
The upper and lower position adjusting units of the die 110 are arranged such that the upper and lower punches 130 are lifted from the lower punch 120 so that the electrode that has been compression molded by the lowering force of the upper punch 130 is lifted up again, ) Of the die 110 is adjusted so that the upper and lower through holes 111 are formed by the die-supporting elastic body after the compression-molded electrode is taken out to form a cavity for filling the powder for electrode production, And the die (110) is raised so as to remove the thermoelectric material. The method according to claim 1,
Further comprising a horizontal holding and cavity space adjusting unit for holding the horizontal and vertical spaces between the lower punch 120 and the die 110 at predetermined intervals in the die supporting elastic body, Compression molding apparatus for powder for electrode production.

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