Infrared concentric disc punching machine

Abstract

The invention discloses an infrared concentric round sheet hole punching machine. A printing device comprises a tension spring, a rack, a stand column, a male connector, a gear, a punching head cutter, a pressing base, an adapter plate and a stand column base, wherein the stand column is perpendicularly installed on the stand column base, and the male connector is installed on the stand column; the adapter plate is installed on the surface of the stand column base; the pressing base is connected with the adapter plate so as to be used for being matched with the punching head cutter to obtain a concentric round sheet; the male connector is connected to the stand column in a sleeving mode; the tension spring is fixed to the top of the rack so as to enable the rack to perform the resetting motion; the rack is connected with the male connector, and the punching head cutter is connected to the bottom of the rack and is used for being matched with the pressing base to cut the concentric round sheet; the gear is connected with the male connector and is matched with the rack to enable the rack ad the punching head cutter to perform the vertical rectilinear motion in the length direction of the stand column. The concentric round sheet made through the infrared concentric round sheet hole punching machine can be used for infrared spectroscopy solid sample making, operation is easy and convenient, notches of the obtained concentric round sheet are neat, and the infrared spectrogram quality is greatly improved while the time is saved.

Description

technical field [0001] The invention belongs to the field of analysis and testing equipment manufacturing, and in particular relates to a concentric disc punching machine required in the preparation of infrared samples. Background technique [0002] Infrared spectroscopy is a type of molecular spectroscopy that can be used to study the structure of organic molecules, analyze functional groups, and to identify chemical species. Infrared spectroscopy is not only widely used in chemical analysis, but also has important applications in many related disciplines, such as petroleum, coal, medicine, geology, environment, meteorology, space science, etc. [0003] In the infrared test of solid powder, the frequently used sample preparation method is the potassium bromide tablet method. Generally, the tablet used for infrared measurement is a transparent disc with a diameter of 13mm and a thickness of about 1mm. The process of infrared tableting is: take about 1-2mg sample and 100-200...

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Problems solved by technology

[0004] However, in the actual sample preparation process, this sample preparation method will encounter two problems: first, the amount of sample used is large, requiring about 1-2 mg, and micro-tablet dies are relatively rare and the extruded flakes are not transparent enough; Second, the transparent sheet is fragile and difficult to handle when it is taken out of the mold

However, since the paper pieces required for the experiment are made by hand, the diameter of the circular paper piece and the position of the central hole are very random, and the deviation from the center of the circular hole in the middle of the circular paper piece will cause uneven force. Transparent and half opaque affect the success rate of infrared sample preparation; in the experiment, we hope that the center of the infrared beam, that is, the strongest part of infrared light, can pass through the center of the sample, so that the sample has the largest contact with infrared light, and the infrared signal is relatively strong. The center of the small hole in the middle of the paper often deviates from the center position, which makes it difficult to focus the spot when testing the sample, so that the center of the infrared beam does not coincide with the center of the sample, resulting in a decline in the quality of the infrared spectrum of the sample; in addition, the circular paper The outer circle is cut by hand. When the size of the outer circle is too large, it is not easy to put it into the mold. The uneven placement of the paper in the mold will also lead to uneven force on the sample after pressurization, making the center of the pressed piece half transparent and half Opaque; when the size of the outer circle of the paper is too small, the paper will shake back and forth when the sample is tiled in the center hole, which also brings inconvenience to sample preparation

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