JP2585810Y2 - Simple KBr tablet press - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to spectrophotometric analysis, and more particularly to a simplified KBr tablet press for forming potassium bromide (KBr) tablets for use in infrared spectrophotometers.

[0002]

2. Description of the Related Art In chemical analysis using an infrared spectrophotometer, wavelength selection is performed using a monochrome meter or the like, infrared light is transmitted through a sample container, detected by a detector, and quantitative analysis of sample components is performed. Particularly, when a solid sample is analyzed by infrared rays, a tablet is often prepared by pressing a homogeneous mixture of the solid sample and KBr having excellent infrared transmittance, and the tablet is often analyzed as a sample container. Conventionally, when a tablet of KBr is formed, it is performed by a press 20 as shown in FIG. That is, the lower die 3 on which the mold 2 is placed is placed on the lower base 21 of the press 20, while the upper die 5 is placed on the upper press bar 22, The mixture of the sample and KBr is molded by pressing with the handle 23. The upper and lower dies 3 and 5 and the mold 2 are, as shown in FIG.
When the projections 5a and 3a are provided on the lower dies 5 and 3 and these projections are fitted into the holes 2a of the mold 2, the KBr of the pressure-formed product is formed.
The structure is such that a gap for making a tablet is formed.

[0003]

When a mixed tablet of a solid sample and KBr is formed by the upper and lower dies 5 and 3 and the mold 2 as described above, the mold 2 is pressed with a considerable force. The tablet molded inside adheres perfectly to the surrounding mold 2 and the surface of the die, and is hard to separate. Further, a sample or KBr is placed in the gap between the upper and lower dies 5 and 3 and the mold 2.
There is a problem that it is quite troublesome to separate the dies 3 and 5 from the mold 2 after molding, because the powder enters and acts as an adhesive. Conventionally, when the dies (3 and 5) and the mold frame 2 are separated from each other, the wedge-shaped dies (not shown) are used to separate the dies so that the tablet may be damaged if the operation is poor.

[0004] The present invention has been made in view of such a problem, and a simple KBr tableting machine which can easily separate the upper and lower dies and molds after forming the tablet and does not damage the tablet. It is intended to provide.

[0005]

That is, in order to solve the above-mentioned problems, the present invention is to solve the above-mentioned problem by providing a protrusion between a lower die having a protrusion on an upper portion and an upper die having a protrusion on a lower portion. In a simple KBr tablet molding machine in which a KBr tablet is formed by arranging a mold having a hole into which a hole is fitted, the center distance between both the lower die and the upper die is equal to the outer diameter of the mold. Alternatively, at least two through holes smaller than the width and larger than the hole diameter are provided, and a rod penetrating through the two through holes from below the lower die or above the upper die is provided.

[0006]

According to the KBr tablet molding machine of the present invention as described above, when the KBr tablet M is molded, as shown in FIG.
The lower die 3, the upper die 5, the mold frame 2, and the molded KBr tablet M are integrally removed from the press 20. Next, the lower die 5, the upper die 3, and the mold 2, which are integrated, are brought below the lower die 3 of the mold 2. Thus, the hole 3 in which the rods 11 and 12 are penetrated through the lower die 3 is formed.
The lower die 3 is removed by inserting the rods 11 and 12 into 1, 32. Further, when the upper die 5 and the mold 2 are in an integrated state and the KBr tablet M is stuck to the upper die 5 side, the upper die 5 is lowered and the mold 2 is raised. Repeatedly, the rod 1 implanted in the removal tool 10 again
When the molds 1 and 12 are inserted into the holes 51 and 52 of the upper die 5, the mold 2 can be removed. Thus, the KBr tablet M can be easily taken out without damaging it.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of an upper die 5 constituting the simplified KBr tablet press of the present invention, and FIG. 2 is a longitudinal sectional view showing a main part of the simple KBr tablet press of the present invention.
This simple KBr tablet press mainly includes a lower die 3 installed on a table 21 of a press 20 (see FIG. 7), an upper die 5 also attached to a lower end of a press bar 22 of the press 20, and It comprises a formwork 2 arranged between the die 3 and the upper die 5 and a removal tool 10 on which bars 11 and 12 are implanted.

[0008] A hole 2a having a predetermined diameter is formed in the mold frame 2 through. At the center of the lower die 3 and at the center of the upper die 5, there are provided convex portions 3a and convex portions 5a which just fit into the holes 2a of the mold frame 2. In addition, hole 2 of formwork 2
The diameter of a is the outer diameter of the KBr tablet to be molded.

The lower die 3 is provided with two holes 31 and 32, and the upper die 5 has two holes 5 and 32.
1, 52 are penetrated. In this case, the two holes 31 and 32 of the lower die 3 and the two holes 5 of the upper die 5
The center-to-center distance of the holes 1 and 52 is smaller than the outer diameter of the mold 2.
It is larger than the diameter.

The rods 11, 1 implanted in the removal tool 10
Reference numeral 2 has a diameter enough to loosely enter two holes 31 and 32 formed in the lower die 3 or two holes 51 and 52 formed in the upper die 5. The removal tool 10
Is placed in another place when molding KBr tablets.

The structure of the main part of the simplified KBr tablet press of the present invention is as described above. Next, the operation for taking out the formed KBr tablet will be described. (1) First, when molding a KBr tablet, the lower die 3 is attached to the base 21, the upper die 5 is attached to the lower end of the press bar 22, and the mold 2 is placed on the lower die 3. A KBr tablet M is formed. (2) When the KBr tablet M is molded, as shown in FIG. 2, the lower die 3, the upper die 5, the mold 2, and the molded KB
r The tablet M is removed from the press 20 as a unit. (3) Next, the removal tool 10 is brought to the lower side of the lower die 5 of the lower die 5, the upper die 3, and the mold 2 in an integrated state. Then, the rods 11 and 12 are moved to the lower die 3
The rods 11 and 12 are inserted into the holes 31 and 32 that are penetrated through
The lower die 3 is lightly pressed to separate the lower die 3 and the mold 2. (4) Further, when the upper die 5 and the mold 2 are in an integrated state and the KBr tablet M is stuck to the upper die 5 side, the upper die 5 is turned down and the mold 2 is turned up. And the rods 11 and 1 implanted in the removal tool 10 again.
When the mold 2 is inserted into the holes 51 and 52 of the upper die 5 and pressed lightly, the form 2 can be removed. Thus, KBr tablet M can be easily prepared.
Can be easily taken out without damaging it. (5) Alternatively, as shown in FIG. 3, the lower die 5, the upper die 3, and the mold 2 in an integrated state are taken out, and a table 15 is placed on both lower ends of the upper die 5, and a removal tool is provided. 10
The rods 11 and 12 implanted in the upper die 5 are
52.

FIG. 4 shows a modified embodiment of the simplified KBr tablet press of the present invention. That is, in this embodiment, when molding a KBr tablet, a table 16 provided with a hollow portion 16a is set on a table 21 of a press 20, and the lower die 3 is punched through the table 16 on the table 16. The rods 18 and 18 are inserted into the holes 31 and 32
A KBr tablet is molded in a state in which is filled. After the KBr tablet is formed, the table 16 is removed, and the rods 18 and 1 are removed.
8, the formwork 2 may be pierced. In this case, form 2
The upper die 5 may be placed on the top. Also, as shown in FIG. 5, the lower dies 3 and the mold frame 2 are held by standing the rods 18 and 18 and pushing the mold frame 2 from below or pushing the mold frame 2 against a press bar 22 with a cylindrical punch 17. You may remove it.

[0013]

As described in detail above, according to the simplified KBr tablet forming apparatus of the present invention, it is very easy to remove the upper and lower dies or the mold after the KBr tablet is formed. And according to the KBr tablet press of this invention,
No damage to the molded KBr tablet upon removal.

[0014]

[Brief description of the drawings]

FIG. 1 is a plan view of an upper die constituting a simplified KBr tablet press of the present invention.

FIG. 2 is a longitudinal sectional view showing a main part of the simplified KBr tablet press of the present invention.

FIG. 3 is a longitudinal sectional view of the simplified KBr tablet press of the present invention when the mold is removed from above the upper die.

FIG. 4 is a longitudinal sectional view showing the main components of a modified example of the simplified KBr tablet press of the present invention.

FIG. 5 is a longitudinal sectional view showing a modified example of the simplified KBr tablet press of the present invention, in which a mold and a lower die are removed.

FIG. 6 is a longitudinal sectional view of an upper die, a lower die, and a mold portion at the time of conventional KBr tablet molding.

FIG. 7 is a schematic side view of a press for forming a KBr tablet.

[Explanation of symbols]

 2 Formwork 2a Formwork hole 2b Groove 3 Lower die 3a Protrusion 3b, 3c Groove 4 Removal rod 5 Upper die 5a Protrusion 5b, 5c Groove 7 Holding metal 8 Lock metal M KBr tablet

Claims (1)

(57) [Scope of request for utility model registration] 1. A KBr tablet is formed by arranging a mold having a hole for fitting the protrusion between a lower die having a protrusion on an upper portion and an upper die having a protrusion on a lower portion. In such a simple KBr tablet press, both the lower die and the upper die are provided with at least two through holes whose center distance is smaller than the outer diameter or width of the mold and larger than the hole diameter, A simple KBr tablet press, wherein a rod is provided so as to penetrate through the two through holes from below the lower die or from above the upper die.