Miniature tabletting device in field of assaying analysis

Abstract

The utility model relates to a miniature tabletting device in the field of assaying analysis, which comprises a frame, a servo hydraulic cylinder, an upper die, a lower die and a laser thickness gauge, the frame is a U-shaped structure, the servo hydraulic cylinder is mounted on the top of the frame, the upper die is connected to a piston rod of the servo hydraulic cylinder, the lower die and the upper die are coaxially arranged in parallel and mounted at the bottom of the frame, and the laser thickness gauge is mounted on the lower die. The laser thickness gauge is installed on a side column of the frame, and the laser thickness gauge is parallel to the surface of the lower die. The hydraulic device is adopted for force application processing to guarantee stable pressure application, the problems that the thickness of gold-silver alloy is inconsistent and the gold-silver alloy cracks due to uncontrolled knocking force are solved, the pressure application device is fixed through the high-strength frame, vertical pressure application is guaranteed, efficient and high-precision operation of gold-silver alloy tabletting in the assaying analysis process is achieved, and the working efficiency is improved. Long-standing technical problems can be eliminated, and the working intensity of operators can be reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of fire assay, in particular to a micro tabletting device in the field of fire assay. BACKGROUND

[0002] Changing a gold-silver alloy from a spherical shape into a sheet shape is one of key links in a fire assay process, the sheet-shaped gold-silver alloy has a larger surface area, and the reaction rate with dilute nitric acid under heating conditions is faster, and the reaction is more complete, so that the accuracy of a fire assay result is ensured.

[0003] At present, the entire field of fire assay adopts a knocking method to change the gold-silver alloy from a spherical shape into a sheet shape. The specific operation is as follows: the spherical gold-silver alloy is placed on a flat anvil, and a small hammer is used to continuously knock the gold-silver alloy until the gold-silver alloy becomes a sheet shape. The following defects exist in the method of changing the gold-silver alloy from a spherical shape into a sheet shape by knocking: the same force cannot be ensured every time in the knocking process, so that the thicknesses of different gold-silver alloys in the same analysis batch are inconsistent; the same angle and the same landing point cannot be ensured every time in the knocking process, so that the thickness of the same gold-silver alloy is uneven; and the appropriate force cannot be ensured in the knocking process, so that cracks are generated in the sheet-shaped gold-silver alloy due to excessive force. CONTENT OF THE INVENTION

[0004] To solve or partially solve the problems in the related art, the application provides a micro tabletting device in the field of fire assay, and a hydraulic device is adopted to ensure that the spherical gold-silver alloy is subjected to vertical and stable applied force.

[0005] The application provides a micro tabletting device in the field of fire assay, which comprises a frame, a servo hydraulic cylinder, an upper die, a lower die and a laser thickness gauge. The frame is in a U-shaped structure, the servo hydraulic cylinder is installed at the top of the frame, the piston rod of the servo hydraulic cylinder is connected with the upper die, the lower die is coaxially and parallelly arranged with the upper die and is installed at the bottom of the frame, the laser thickness gauge is installed on the side column of the frame, and the laser thickness gauge is parallel to the surface of the lower die.

[0006] The lower die is provided with a suction hole, the suction hole is located at the center of the lower die and penetrates through the lower die to be connected with a vacuum pump at the bottom of the lower die.

[0007] The top of the suction hole is provided with a mounting groove, and the mounting groove is used for limiting and mounting an elastic washer.

[0008] The technical scheme provided by the application can have the following beneficial effects:

[0009] The application provides a miniature tablet device in the field of fire assay, which adopts a hydraulic device to perform force processing to ensure stable pressure, solves the problem of inconsistent thickness of gold-silver alloy and cracks of gold-silver alloy caused by uncontrollable knocking force, and realizes efficient and high-precision operation of gold-silver alloy tablet in the fire assay process through a high-strength frame to fix the pressure device and ensure vertical pressure, which can eliminate the long-standing technical problems and reduce the working strength of the operator.

[0010] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory and are not restrictive of the application. BRIEF DESCRIPTION OF DRAWINGS

[0011] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, and in which:

[0012] Figure 1 is a structural schematic diagram of the device shown in the embodiments of the application;

[0013] Reference Signs:

[0014] In the drawings, 1 is a frame, 2 is a servo hydraulic cylinder, 3 is an upper mold, 4 is a lower mold, and 5 is a laser thickness gauge. DETAILED DESCRIPTION

[0015] Embodiments of the present application will be described in more detail by referring to the attached drawings. Although embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0016] It should be understood that although the terms "first", "second", "third" and the like can be used in the present application to describe various information, these information should not be limited by these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0017] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0018] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0019] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 The illustrated miniature pressing device for metallographic analysis includes: a frame 1, a servo hydraulic cylinder 2, an upper mold 3, a lower mold 4, and a laser thickness gauge 5. The frame 1 is a high-strength, one-piece cast metal structure with a U-shaped cross-section. The servo hydraulic cylinder 2 is mounted on the top of the frame 1, and the upper mold 3 is connected to the piston rod of the servo hydraulic cylinder 2. The upper mold 3 is a cylindrical hard alloy flat-head pressing block. The lower mold 4 is coaxially and parallel to the upper mold 3 and is mounted on the bottom of the frame 1. The laser thickness gauge 5 is a non-contact measuring device mounted on a side column of the frame 1, and is parallel to the surface of the lower mold 4.

[0021] The upper mold 3 and the piston rod of the servo hydraulic cylinder 2 are connected by threads and floating joints to ensure stability and facilitate replacement; the mold and the frame 1 are connected by threads or bayonet to ensure stability and facilitate replacement.

[0022] The gold and silver alloy to be pressed is placed in the center of the lower mold 4. After the servo hydraulic cylinder 2 is started, it drives the upper mold 3 to move downward through the piston rod. When the laser thickness gauge 5 detects that the thickness of the gold and silver alloy has reached the set value, the servo hydraulic cylinder 2 drives the upper mold 3 to move upward through the piston rod and return to the initial position.

[0023] Because the gold-silver alloy to be pressed into a tablet is in a spherical structure, when it is placed on the lower mold 4, in order to solve the problem that the spherical structure is not easy to be placed stably due to rolling, a vacuum adsorption structure is arranged on the lower mold 4. An adsorption hole is arranged at the center of the lower mold 4, the adsorption hole penetrates through the lower mold 4 and is connected with a vacuum pump at the bottom of the lower mold 4, and a cavity is arranged at the bottom of the frame 1.

[0024] It is necessary to ensure that the diameter of the hole is appropriate, which can generate sufficient adsorption force and will not affect the structural strength of the mold and the effect of tablet pressing due to the excessively large hole diameter. At the same time, the connection part of the lower mold 4 and the vacuum pump is sealed to prevent air leakage, so as to ensure the effect of vacuum adsorption. Further, an installation groove is arranged at the top of the adsorption hole, and the installation groove is used for limiting installation of an elastic gasket. The elastic gasket with good buffering performance is installed on the surface of the mold around the adsorption hole, and when the spherical gold-silver alloy is adsorbed, the elastic gasket can play a buffering role to reduce the impact force between the sphere and the mold and prevent scratches or deformation on the surface of the sphere. At the same time, the elastic gasket can also play a certain sealing role to enhance the adsorption effect.

[0025] When the spherical gold-silver alloy is placed on the lower mold 4, the vacuum pump is started, and the negative pressure generated through the adsorption hole tightly adsorbs the sphere at the center of the mold, so that the sphere cannot roll. After tablet pressing is completed, the vacuum pump is turned off to release the adsorption force, so as to take out the pressed tablet-shaped alloy.

[0026] Finally, it should be noted that the relationships such as first and second in the present text are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term includes, contains or any other variant is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0027] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on multiple network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0028] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations based on the description, equivalents, and / or substitutions of elements individually or collectively to the entire disclosure.

Claims

1. A miniature tablet compression device for the field of gold assay analysis, characterized in that, include: The system comprises a frame, a servo hydraulic cylinder, an upper mold, a lower mold, and a laser thickness gauge. The frame has a U-shaped structure, with the servo hydraulic cylinder mounted on the top. The piston rod of the servo hydraulic cylinder is connected to the upper mold. The lower mold is coaxially and parallel to the upper mold and is mounted on the bottom of the frame. The laser thickness gauge is mounted on a side column of the frame and is parallel to the surface of the lower mold.

2. The micro tablet pressing device for gold assay analysis according to claim 1, characterized in that, The lower mold has an adsorption hole located at the center of the lower mold and passing through the lower mold. A vacuum pump is connected to the bottom of the lower mold.

3. The micro tablet pressing device for gold assay analysis according to claim 2, characterized in that, The top of the adsorption hole is provided with a mounting groove, which is used to limit the installation of the elastic washer.

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