JPH0243594Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a powder molding press apparatus, and is applied to, for example, the production of sealed glass tablets for producing hermetic terminals.

Conventional technology An airtight terminal is a terminal in which a lead wire is hermetically sealed inside a metal outer ring through glass, and is used for semiconductor devices,
It is widely used in various fields such as crystal resonators and surface acoustic wave devices. When manufacturing this hermetic terminal,
Glass tablets are used. This glass tablet is made by kneading an organic binder into fine glass powder, granulating it, press-molding it into a predetermined shape, and then firing it in air to burn off the organic binder.

Conventionally, a powder molding press apparatus shown in FIG. 2 has been used for the press molding. In the figure, 1
1 is a table with a smooth surface, and a through hole 2 is provided in a part of the table, through which a shaft 3 is rotatably inserted. A shaft 4a of a feeder cup 4 is fixed above the shaft 3, and sliding plates 5 and 6 are fixed to the shaft 4a and the lower surface of the feeder cup 4, respectively. A hole 7 is provided on the sliding trajectory of the feeder cup 4 of the table 1. A lower punch 8 is inserted from below into the hole 7 so as to be vertically movable. An upper punch 9 is arranged to be vertically movable. 10 is a hopper that supplies glass powder 11 to the feeder cup 4. Reference numeral 12 denotes a spring for pressing the feeder cup 4 against the upper surface of the table 1, and its spring force can be adjusted by a nut 13.

Next, the operation of the powder molding press apparatus will be explained.

First, when the glass powder 11 is supplied to the hopper 10, the glass powder 11 descends into the feeder cup 4 and is supplied. Therefore, the shaft 2 is rotated by a drive source (not shown) to move the feeder cup 4 to a position above the hole 7 and reciprocate over the hole 7 several times. Then, the glass powder 1 in the feeder cup 4
1 is filled into the hole 7. Next, when the feeder cup 4 is moved and removed from above the hole 7, the glass powder 11 is rubbed off at the edge of the sliding plate 6 of the feeder cup 4. Thereafter, the upper punch 9 descends to press-form the glass powder 11 in the hole 7 with a predetermined pressing pressure. After the upper punch 9 rises and retreats, the lower punch 8 rises by a predetermined dimension, causing the glass powder molded product to protrude onto the upper surface of the table 1. This glass powder molded product is made of feeder cup 4.
It is removed from the table 1 by being pressed by a take-out piece (not shown) that is fixed integrally with the table 1, and is stored in a storage box.

Problems to be solved by the invention In the above powder molding press device, table 1
Since the sliding plates 5 and 6 are always in contact with each other and sliding, the sliding plates 5 and 6 will wear out as the usage time progresses. By the way, since the sliding plate 6 has a larger sliding distance on the table 1 per one reciprocating movement of the shaft 3 than the sliding plate 5, the amount of wear increases. Therefore, a gap is created between the sliding plate 6 at the bottom of the feeder cup 4 and the top surface of the table 1.
The glass powder 11 spills on the upper surface of the feeder cup 4, which impedes the sliding movement of the feeder cup 4 and causes loss of the glass powder 11.

Even if the nut 13 is tightened in an attempt to increase the pressing force of the sliding plate 6 on the feeder cup 4 side against the top surface of the table 1, since the sliding plate 6 has been worn more severely than the sliding plate 5 and is thinner, it will not slide. The gap between the plate 6 and the table 1 cannot be eliminated.

Means for Solving the Problems Therefore, in order to solve the above problems, this invention divides the feeder cup into a base fixed to a shaft and a tip that can move up and down with respect to this base.
A pressing body is placed across the base and the tip, one end of the pressing body is pressed by a spring loosely fitted to the shaft, and the other end presses the tip of the feeder cup. This is a characteristic feature.

Effect In the above configuration, when the spring is tightened,
Since the tip of the feeder cup is pressed through the pressing body, the feeder cup can always slide in close contact with the table top surface.

Embodiment Hereinafter, a powder molding press apparatus according to an embodiment of this invention will be described with reference to FIG. Note that parts that are the same as or correspond to those in FIG. 2 are given the same reference numerals and their explanations will be omitted. In this embodiment, the feeder cup 20 is divided into a base portion 20a fixed to a shaft 3 and a tip portion 20b, which are connected by a pin 21, and are horizontally integrated by rotation of the shaft 3. However, the tip portion 20b can move independently in the vertical direction. 22 is a pressing body placed on the feeder cup 20 across the base 20a and the tip 20b, and has a through hole 22a near one end, into which the shaft 3 is loosely fitted. There is. Reference numeral 23 denotes a spring that is loosely fitted into the threaded portion 3a of the upper portion of the shaft 3, the lower end of which is placed on the pressing body 22, and the upper end of which is loosely fitted to the threaded portion 3a of the shaft 3.
It is pressed by a nut 24 screwed onto the holder and is in a compressed state. Therefore, the other end of the pressing body 22 presses the tip 20b of the feeder cup 20.

According to the above structure, even if the feeder cup 20b is worn out, the pressing body 22 always presses the tip end 20b of the feeder cup 20b.
is pressed independently from the base 20a, so
No gap is formed between the lower surface of the tip 20b and the upper surface of the table 1, and therefore the glass powder 11 does not spill onto the upper surface of the table 1, preventing the movement of the tip 20b and preventing the glass powder from spilling. 11
loss will no longer occur. Further, if the tip portion 20b is worn, the nut 24 may be tightened, and if the wear exceeds a limit, only the tip portion 20b may be replaced.

The above embodiment shows a case where the top surface of the tip 20b of the feeder cup 20 is stepped and the pressing body 22 is L-shaped.
The upper surface may be flat and higher than the upper surface of the base 20a, or the upper surface of the tip 20b may be flat and the same as the upper surface of the base 20a, and the pressing body 22 may have a shape. .

Furthermore, this invention can be applied not only to the production of glass tablets for airtight terminals, but also to powder molding presses for any material.

Effects of the invention As described above, this invention divides the feeder cup into a base fixed to the shaft and a tip that is movable in the vertical direction with respect to the base, and a pressing body is mounted astride these base and tip. One end of this pressing body is pressed by a spring loosely fitted around the shaft, and the other end presses the tip of the feeder cup, so even if the tip of the feeder cup wears out, it will not touch the top surface of the table. Since no gap is formed between the two and no powder is spilled onto the top surface of the table, movement of the feeder cup is not hindered and no powder is lost.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a powder molding press apparatus according to an embodiment of this invention. FIG. 2 is a sectional view of a conventional powder molding press apparatus. 1...Table, 7...Through hole, 8...Lower punch, 9...Upper punch, 10...Hopper, 11...
Powder, 20... feeder cup, 20a... base, 20b... tip, 21... pin, 22...
Pressing body.

Claims (1)

[Claims for Utility Model Registration] A table, a shaft rotatably inserted through the table, a feeder cup attached to the shaft and sliding on the table, a hopper for supplying powder to the feeder cup, and a hopper for supplying powder to the feeder cup; In a powder molding press device comprising a hole formed on the movement trajectory of the feeder cup, a lower punch inserted into the hole and movable up and down, and an upper punch arranged above the hole, the feeder cup is , divided into a base fixed to a shaft and a tip that is movable up and down with respect to the base, a pressing body is placed astride the base and the tip, and one end of this pressing body is used as the axis. 1. A powder molding press device characterized in that the other end is pressed by a loosely fitted spring to press the tip of a feeder cup.