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How to fill the inside of the sagger with powder

A technology of powder and sagger, which is applied in the field of filling powder into the inside of sagger, which can solve the problems of inability to carry out wet filling, fear of contact with water, and difficulty in forming, so as to eliminate unevenness, improve production efficiency, and suppress pollution. Effect

Active Publication Date: 2011-12-14
NGK INSULATORS LTD
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  • Abstract
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Problems solved by technology

[0005] However, this kind of powder is afraid of contact with water, so wet filling is often not possible, and it is in a fluffy state in a dry state, so it is difficult to form a shape with a high peripheral part.
That is, when the powder is first filled into the saggar, the surface of the powder is flat, and in this state, it is difficult to lift the upper part of the powder upward or compact the whole into a concave shape based on this shape. , there may not be existing techniques for solving the problem

Method used

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  • How to fill the inside of the sagger with powder
  • How to fill the inside of the sagger with powder
  • How to fill the inside of the sagger with powder

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Embodiment Construction

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0026] In this embodiment, the sagger is a square graphite sagger, and the powder is ceramic powder used as a positive electrode material of a lithium battery. The particle diameter of the powder is 2-15 μm, and it is a material that is afraid of contact with moisture. In addition, firing was performed in a nitrogen atmosphere. However, the present invention is not limited to this embodiment.

[0027] First, to the inside of the empty sagger 1 conveyed by a suitable conveying unit (not shown) such as a roller conveyor, as shown in FIG. figure 1 Feed the powder as shown. The sagger 1 is supported inside the decompression tank 2, and is supplied from above by the screw feeder 6 while being lifted by the sagger lifting unit 5 to a position close to the cover 4 having the powder supply port 3 Powder. It is preferable to keep the amount of powder supplied to e...

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Abstract

PROBLEM TO BE SOLVED: To provide a method for packing powder which is in a dry state and made to have a surface shape formed by making the thickness of the central part of the powder thicker and the thickness of the peripheral part of the powder thinner in a sagger in a compacted state.SOLUTION: A prescribed amount of the dry powder is supplied into the sagger 1. While a first pressing plate 16 is brought down to a prescribed position to a powder surface, vibration is applied to the sagger 1, and the powder surface is formed in a shape in which the middle is hollowed according to the lower surface shape of the first pressing plate. Next, the formed powder surface is pressed down further by a second pressing plate 17 to compact the powder. In this way, the productivity of a burning process and the quality of baking can be improved.

Description

technical field [0001] The present invention relates to a method of filling dry state powder into a sagger in a compacted state, and in particular to a method suitable for filling ceramic powder such as an electrode material of a lithium battery into a sagger with high filling efficiency. The method of filling the inside of the bowl with powder. Background technique [0002] When the powder used as the raw material of lithium batteries and other electronic components is fired by an industrial method, the method generally used is to fill the powder into a heat-resistant container called a saggar, and then burn it. Firing in a furnace. In order to increase the production efficiency of this firing step, it is required to increase the filling efficiency of the powder into the sagger as much as possible. [0003] As a method of improving the filling efficiency of powder, the vibration filling method has been adopted for a long time. For example, Patent Document 1 discloses a m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65G65/32B65G69/02B28B3/02B28B3/08C04B35/626
CPCY02E60/12Y02E60/10B22F3/03B28B3/02B30B11/022B30B11/027B30B15/062H01M4/04
Inventor 野入一二夫青木道郎
Owner NGK INSULATORS LTD
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