JPS59217135A - Forming device for tablet for infrared spectroscopic measurement - Google Patents

Abstract

PURPOSE:To simplify an operation of forming a tablet and to facilitate to take out the formed tablet by a construction wherein a push rod provided with a suction port for vacuum suction is set on a base plate having a screw hole formed in the center with a cylindrical projection of the former put in the hollow cylindrical concavity of the latter. CONSTITUTION:A base plate 14 fitted with a screw 15 is put in a supporting block 13. Then, a mixed sample 4 is put uniformly in a hollow cylindrical concavity 14b of the base plate 14. An O-ring 17 is set on the base plate 14, and a push rod 16 is set thereon Then, a vacuum pump connected to a suction port 16b of the push rod 16 is operated, while a manual hydraulic press is operated to apply a pressure to the push rod 16, and this state is left as it is for a prescribed time. Thereafter, the vacuum pump is stopped, and the supporting block 13, the base plate 14 and the push rod 16 are separated from one another. Thereby the sample 4 is formed into a tablet and retained in the base plate 14.

Description

Detailed Description of the Invention The present invention relates to a tablet forming apparatus for infrared spectroscopy. More specifically, when a powdered sample is analyzed by infrared spectroscopy, it is possible to The present invention relates to a tablet forming apparatus for infrared spectroscopy for forming into tablets a powder mixed with a dispersing material such as.

Conventionally, there have been devices of this type as shown in FIGS. 1 and 2. In the figure, a base plate (1) with a protruding internal cylinder part /a in the center, a cylinder plate that fits into the protruding internal cylinder part /a and is placed on the base plate l, and a cylinder plate that holds the mixed sample in the cylinder plate l. The opposite mirror plate 3, the outer cylinder 5 that surrounds the cylinder and is placed on the base grating l via an O-ring ta, the push rod 6 that presses the mirror plate 3 from above, and the O-IJ ring 7a that presses the A ring 7 for pressing against the rod 6, and a ring 7 screwed onto the upper end of the outer cylinder S.
It consists of a tightening screw g that presses the.

The procedure for forming tablets using such a device is as follows: (1) Place the sample in an agate mortar (not shown) and grind thoroughly.

■ Mix potassium bromide (KBr) powder (powder of 200 mesh or less) and the sample, grind well in an agate mortar, and mix well at the same time (with the sample).

(See the table below for the amount of KBr powder to mix.)

(2) Using the tablet forming apparatus shown in FIGS. 1 and 2, place the paste plate on a stable table, and fit the cylinder λ into the protruding cylindrical portion /a.

■ Insert one mirror plate J into the cylinder holder.

Spread the sample mixture of the sample and potassium bromide powder evenly on top of it using a spatula (the amount is as shown in the table).

■ Gently place another mirror plate 3 on top of the mixed sample da, set the outer cylinder, push rod 6.0-ring a, ring 7, and tightening screw g in this order, and tighten the tightening screw g.

■ Pipe protruding next to base play 1-//b
Connect the rubber hose of the vacuum pump (not shown) to the molding device, and the molding device is set up.

■ Activate the vacuum pump, move the hand hydraulic press (not shown) until the pressure shown in the table is reached, and press the push rod 6.
Press as shown by the arrow. When the pressure shown in the table is reached, the pressure by the hydraulic press is stopped and the pressure is left as it is for the time shown in Table 1.

■ Stop the vacuum pump and remove its piping from the vibrator/b. ■ Hold the base plate l in place and pull the outer cylinder S upwards. remains in

FIG. 3 shows a tablet ejector, which is composed of a receiving stand 9 and a sample pushing rod 10.

■ Place the sample into the cylinder as shown in Fig. 3, insert the sample pushing rod 10 into the hole in the cylinder, and gently push it out using a hydraulic press (not shown).

The mixed sample tablet q thus taken out is.

Assembly metal cell of metal tablet holder shown in Fig.
, //b, and is fixed from above with a sample fixing screw /2a, and is attached to an infrared spectrometer (not shown) to perform measurements.

However, as mentioned above, the conventional device with the above configuration is extremely complicated to operate, and is difficult to operate.

The number of parts is extremely large, and the molded tablets have to be touched directly with the hands and transferred to a metal tablet boulder, resulting in an S point for measurement and the disadvantages of being time-consuming.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional ones, and is a one-tablet molding device.

It mainly consists of two parts: a push rod and a base plate, and
By removing the screws from the pace grate, it can be used as a metal tablet holder.

It is an object of the present invention to provide a tablet forming apparatus for infrared spectroscopy that has a minimum number of parts and is easy to operate.

An embodiment of the present invention will be described below with reference to FIG. 13 Hakebu/,? A concave part /3b is formed in the center of the five parts /3a. The base plate (J') fitted into the receiving part /J' has a central screw hole 1ga and a cylindrical recess /Fb formed above it, and further has a notch C formed on its outer periphery.

Screw/Left screw into screw hole ldaa. A protrusion @/A that fits into the cylindrical recess l/A is formed in the center of the push rod/6, and a suction port/Ab connected to a vacuum pump (not shown) is attached around the protrusion/Aa. It is set up through.

A pressing force by a hydraulic press (not shown) is applied to the protrusion /AC formed on the upper part of the press ball /A. Tsuku is O-
Show the ring.

Next, the action and effect will be explained. First, the procedure for forming tablets is as follows: ■ Place the sample into an agate mortar (not shown).

Grind well.

■ Potassium bromide (KBr) powder (λθ
Powder of O mesh or less) and the sample are thoroughly ground in an agate mortar and mixed well at the same time (the amount of sample and KBr powder to be mixed is shown in the table v'=t).

■ Receiving parts t3e, F of the receiving stand 13 with screws attached
c Place the base plate lφ and fit the base plate/F into the receiving stand 13. At this time, the base play 1-/4'
Make sure that the screw IS is properly engaged.

■ Spread the mixed sample of the sample and potassium bromide powder evenly into the cylindrical opening of the base plate with a drumstick (amounts are as shown in the table).

■ Set 0-ring/7 on base plate/g,
Set the push rod 16 on the pace plate/'4.

■ Connect the rubber hose of the vacuum pump to the suction port 16b of the push rod lB to complete the setup of the tablet molding device.

■ Activate the vacuum pump and apply pressure to the push rod by operating the hand hydraulic press until the pressure shown in the table is reached. When the pressure shown in the table is reached, stop the hydraulic press and leave it as it is for the time shown in the table.

■ Stop the vacuum pump and remove its piping from the push rod 14.

■ Receiving stand 13. Separate the pace plate ta-push rod/A from each other and remove it from the base plate/Z by loosening the screws/, 1.
As shown in the figure, a sample molded into a tablet is held in a light-transmitting state.

Since there are notches C on both sides of the pace plate/F, the base plate/F can also be used as a holder and can be attached to an infrared spectrometer (not shown) for measurement.

As described above, according to the present invention, there is no need for a conventional commercially available tablet molding machine with a large number of parts, as well as a tablet ejector and a metal tablet holder, and a base plate and a push rod with a suction port are sufficient. And - the base plate can also be used as a holder for infrared analysis measurements. Also,
This has the effect of simplifying the work from molding to analysis without touching the sample (agent) K.

table

[Brief explanation of drawings]

Fig. 1 is a front sectional view of the conventional device, Fig. 2 is an exploded perspective view thereof, and Fig. 1 is a front sectional view of a conventional tablet ejector, FIG. 9 is a perspective view of a conventional metal tablet side holder, and FIG. 5 is a partially exploded front sectional view of an embodiment of the present invention. Fig. A is a front cross-sectional view of the push rod, Fig. 187, and Fig. g are a front cross-sectional view and a bottom view showing a mode in which the hasono pace plate is also used as a holder. q...Mixed sample, 1. ? ... Uke stand, / 3Fl... Uke department, / ,? b...concavity, lg...base knob ``/
-t, /'411...screw hole, /'Jb...cylindrical recess,
/lIC...notch, lya...screw, /4...push rod,
/l F+...Protruding circular part, 1At-1...Suction 11,
/Ac...protrusion, '7...0-ring. In addition, the same reference numerals in each item 1 indicate the same or corresponding parts. Agent Masu Oiwa Yue 5 figures non

Claims (1)

[Claims] (1) In a tablet forming device for infrared spectroscopy, which presses a mixed powder of a sample and a dispersion material under vacuum to form transparent tablets, there is a pedestal with a holder formed in it and a screw hole in the center. A base plate having a cylindrical recess formed therein and fitted into the receiving part, a screw screwed into the screw hole, and a protruding cylinder formed in the center to be fitted into the cylindrical recess, the base plate being connected to the periphery of the protruding cylinder. 1. A tablet forming device for infrared spectroscopy, comprising a push rod equipped with a vacuum suction port. (,2) Claim 1 comprising a base grate with a notch formed on its outer periphery for attachment to an infrared spectrometer
Tablet forming apparatus for infrared spectrometry as described in 2.