Positionable powder tablet press

Abstract

The utility model belongs to the technical field of experimental equipment, and provides a localizable powder tablet press which comprises a base, the base comprises a workbench, a rack and a lead screw, an upper pressing head is arranged at the bottom end of the lead screw, and a lower pressing head is arranged on the upper end face of the workbench; the mold comprises a mold sleeve, a mold pressing head and a mold base, the mold sleeve is provided with an extrusion cavity and a closed cavity, the extrusion cavity is communicated with the closed cavity, and the area of the cross section of the closed cavity is larger than that of the cross section of the extrusion cavity; wherein the lower end face of the upper pressing head is provided with an upper positioning groove matched with the mold pressing head, the upper end face of the lower pressing head is provided with a lower positioning groove matched with the mold base, and the upper positioning groove and the lower positioning groove are coaxially arranged. According to the localizable powder tablet press provided by the utility model, errors caused by manually judging the placement position can be eliminated, and accurate positioning of the stamping die is realized, so that the damage to the die caused by the deviation of the placement position is effectively avoided, and the quality of a powder sample tablet is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of experimental equipment, and particularly relates to a positionable powder tablet press. Background Art

[0002] At present, when a manual powder tablet press is used in a laboratory, the stamping die needs to be placed at the center of the powder tablet press. This process requires manual judgment whether the stamping die is located at the center. However, existing powder tablet presses do not have a positioning function. The operator only places the stamping die at the approximate center by feeling. When the stamping die is placed far away from the center, the stamping die is easily damaged due to the high pressure during the pressurization process, and even the die may be missing edges, cracks, or even deformed. In addition, during use, it is necessary to ensure that the punch head in the stamping die is placed directly in the stamping die sleeve, but the existing powder tablet press can only rely on manual judgment and determination. When the punch head and the stamping die sleeve are offset at an angle, forced pressurization at this time will cause damage to the stamping die, resulting in a gap or loose fit between the punch head and the stamping die sleeve, which in turn causes the stamping die to be unable to accurately determine the fixed angle.

[0003] Therefore, it is necessary to design a powder tablet press that can accurately locate the placement position of the stamping die and eliminate the error of manual judgment of the placement position. Summary of the invention

[0004] In order to solve the above technical problems, the utility model proposes a positionable powder tablet press, which can eliminate the error of manual judgment of placement position and realize accurate positioning of the stamping die, thereby effectively avoiding damage to the die caused by placement position deviation and ensuring the quality of powder sample tableting.

[0005] The technical solution of the utility model is:

[0006] The utility model provides a positionable powder tablet press, comprising:

[0007] A base, the base comprising a workbench, a frame mounted above the workbench, and a lead screw movably arranged on the frame, an upper pressure head is arranged at the bottom end of the lead screw, and a lower pressure head which can be raised and lowered is arranged on the upper end surface of the workbench;

[0008] A mold, the mold comprising a mold sleeve, a mold pressing head and a mold base, the mold sleeve is provided with an extrusion cavity adapted to the mold pressing head, and a closed cavity adapted to the mold base, the extrusion cavity is connected to the closed cavity and the cross section of the closed cavity is larger than the cross section area of ​​the extrusion cavity;

[0009] Among them, the lower end surface of the upper pressing head is provided with an upper positioning groove adapted to the die pressing head, and the upper end surface of the lower pressing head is provided with a lower positioning groove adapted to the die base, and the upper positioning groove and the lower positioning groove are coaxially arranged.

[0010] Preferably, the mold also includes a die set, which includes an upper die and a lower die, and the powder sample is arranged between the upper die and the lower die, and the upper die and the lower die are both adapted to the extrusion cavity so that they can move up and down in the extrusion cavity.

[0011] Preferably, the mold further comprises a die-removing seat, which is in the shape of a ring table adapted to the closed cavity, and whose inner diameter is adapted to the upper mold piece and the lower mold piece;

[0012] The lower positioning groove is provided with a mold withdrawal slot adapted to the mold withdrawal seat.

[0013] Preferably, the side wall of the ejector seat is provided with an opening, and its cross section is "C"-shaped.

[0014] Preferably, the mold further comprises a demolding seat, the demolding seat is provided with a demolding platform adapted to the closed cavity, the demolding platform is provided with a storage tank for placing the tabletting sample, and the bottom surface of the storage tank is spherical arc-shaped.

[0015] Preferably, the mold base is provided with a boss, and the boss is matched with the closed cavity so that the mold sleeve can be closed and sleeved on the mold base.

[0016] Preferably, a hydraulic oil chamber is provided inside the base, the workbench is provided with a hydraulic cylinder connected to the hydraulic oil chamber, and the base is provided with a pressurizing handle connected to the hydraulic oil chamber, so as to realize the upward extrusion of the lower pressure head by pressurizing the pressurizing handle.

[0017] Preferably, the base is also provided with an oil drain valve stem, an oil filling screw and a pressure gauge which are connected to the hydraulic oil chamber.

[0018] Preferably, the lead screw is threadedly connected to the stand, and a manual turning wheel is provided at the top end of the lead screw.

[0019] Compared with the prior art, the utility model has the following advantages and effects:

[0020] (1) The upper positioning groove matched with the die pressing head and the lower positioning groove matched with the die base are adopted, so there is no need to manually judge whether the placement position of the die is located at the center position, thereby shortening the time for manual judgment whether the placement position is located at the center position, thereby improving the efficiency of experimental tableting, and at the same time effectively avoiding damage to the die caused by placement position deviation, thereby increasing the service life of the die and ensuring the quality of powder tableting;

[0021] (2) The upper positioning groove and the lower positioning groove are coaxially arranged, and the mold is placed at the center position by adapting the lower positioning groove and the mold base. The angle of the mold head inserted into the mold sleeve is ensured by adapting the upper positioning groove and the mold head, that is, the mold head is placed directly into the extrusion cavity of the mold sleeve, thereby avoiding wear of the mold head and the inner wall of the mold sleeve due to placement angle deviation;

[0022] (3) A die set including an upper die and a lower die is used. During use, the powder sample is placed between the upper die and the lower die. During the tableting process, the sample does not contact the die head and the die base, which effectively prevents the powder sample from adhering to the extrusion end faces of the die head and the die base, reduces the cleaning steps, and improves the experimental tableting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a positionable powder tablet press in Example 1 of the utility model;

[0024] Figure 2 This is a schematic structural diagram of a base in a positionable powder tablet press in Example 1 of the utility model;

[0025] Figure 3 This is a schematic structural diagram of a lead screw in a positionable powder tablet press in Example 1 of the utility model;

[0026] Figure 4 This is a schematic structural diagram of a mold in a positionable powder tablet press in Example 1 of the utility model;

[0027] Figure 5 This is a schematic structural diagram of a mold sleeve in a mold of a positionable powder tablet press in Example 1 of the utility model;

[0028] Figure 6 Another structural schematic diagram of the mold in the positionable powder tablet press in Example 1 of the utility model;

[0029] Figure 7 This is a schematic structural diagram of a base in a positionable powder tablet press in Example 2 of the utility model;

[0030] Figure 8 It is a schematic structural diagram of the mold in the positionable powder tablet press in Example 2 of the utility model.

[0031] 1. Base; 11. Workbench; 111. Lower pressure head; 1111. Lower positioning groove; 1112. De-mold slot; 12. Stand; 13. Screw; 131. Upper pressure head; 1311. Upper positioning groove; 132. Manual wheel; 14. Pressurizing handle; 15. Oil drain valve stem; 16. Oil filling screw; 17. Pressure gauge; 2. Mold; 21. Mold sleeve; 211. Extrusion cavity; 212. Closed cavity; 213. Vacuum nozzle; 22. Mold pressing head; 23. Mold base; 231. Boss; 24. Mold sheet group; 241. Upper mold sheet; 242. Lower mold sheet; 25. De-mold base; 251. De-mold platform; 252. Storage tank. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the present invention, the present invention is now further described in conjunction with specific implementation methods.

[0033] Embodiment 1:

[0034] like Figure 1 to Figure 6 As shown, the utility model provides a powder tablet press, which specifically includes a base 1 and a mold 2. During use, a powder sample is placed in the mold 2, and then the mold 2 is placed on the base 1 to complete tableting of the powder sample.

[0035] like Figure 1 , Figure 2 As shown, the base 1 includes a workbench 11, a stand 12 mounted above the workbench 11, and a lead screw 13 movably mounted on the stand 12, the lead screw 13 is threadedly connected to the stand 12, specifically, the lead screw 13 is provided with an external thread, the stand 12 is provided with a threaded hole to achieve the up and down movement of the lead screw 13 by rotating the lead screw 13, a manual rotating wheel 132 is provided at the top of the lead screw 13, an upper pressing head 131 is provided at the bottom of the lead screw 13, and an upper positioning groove 1311 is provided on the lower end surface of the upper pressing head 131, refer to Figure 3 As shown, a liftable lower pressure head 111 is provided on the upper end surface of the workbench 11, and a lower positioning groove 1111 is provided on the upper end surface of the lower pressure head 111. The lower pressure head 111 and the upper pressure head 131 are coaxially arranged, wherein the upper positioning groove 1311 is matched with the upper end surface of the ram 22 so that the ram 22 is embedded in the upper positioning groove 1311, and the lower positioning groove 1111 is matched with the lower end surface of the mold base 23 so that the mold base 23 is embedded in the lower positioning groove 1111, thereby realizing the precise positioning and placement of the mold 2.

[0036] A hydraulic oil chamber is provided inside the base 1, and a hydraulic cylinder connected to the hydraulic oil chamber is provided inside the workbench 11. The lifting and lowering of the pressure head 111 by the hydraulic oil chamber and the hydraulic cylinder is a mature prior art, and its specific structure is not described here one by one. The base 1 is provided with a pressurizing handle 14 connected to the hydraulic oil chamber, so that the pressure head 111 can be lifted and squeezed by applying pressure through the pressurizing handle 14. The base 1 is also provided with an oil drain valve stem 15 connected to the hydraulic oil chamber, an oil filling screw 16 and a pressure gauge 17. The oil drain valve stem 15 is used to release the oil pressure to reset the pressure head 111.

[0037] like Figure 4 , Figure 5 As shown, the mold 2 includes a mold sleeve 21, a molding head 22, and a mold base 23. The mold sleeve 21 is provided with an extrusion cavity 211 and a closed cavity 212 which pass through from top to bottom. The cross section of the closed cavity 212 is larger than the cross section of the extrusion cavity 211. The molding head 22 is adapted to the extrusion cavity 211 so that the molding head 22 can move up and down in the extrusion cavity 211. The mold base 23 is provided with a boss 231. The boss 231 is adapted to the closed cavity 212 so that the mold sleeve 21 is closed and sleeved on the mold base 23. The mold sleeve 21 is provided with a vacuum nozzle 213 which is connected to the closed cavity 212. The vacuum nozzle 213 passes through the side wall of the mold sleeve 21 and is used to extract air from part of the powder sample during the tableting process to form a vacuum environment.

[0038] The mold 2 also includes a mold group 24, which can be provided with multiple groups. The mold group 24 includes an upper mold 241 and a lower mold 242. The powder sample is arranged between the upper mold 241 and the lower mold 242. The upper mold 241 and the lower mold 242 are both adapted to the extrusion cavity 211 so that they can move up and down in the extrusion cavity 211.

[0039] like Figure 6 As shown, the mold 2 also includes a demolding seat 25, and the demolding seat 25 is provided with a demolding platform 251. The demolding platform 251 is adapted to the closed cavity 212 so that the demolding sleeve 21 can be snapped into the closed cavity 212 at the bottom of the sleeve 21. The demolding platform 251 is provided with a storage tank 252 for placing the tablet sample. The bottom surface of the storage tank 252 is a smooth arc surface, so as to facilitate the removal and collection of the tablet sample.

[0040] During specific use, firstly, the die base 23 is clamped on the bottom of the die sleeve 21, the lower die piece 242 is horizontally placed in the extrusion cavity 211 of the die sleeve 21, and a quantitative powder sample is poured into the extrusion cavity 211, and then the upper die piece 241 is horizontally placed in the extrusion cavity 211 of the die sleeve 21, and the opposite part of the die pressing head 22 is placed in the extrusion cavity 211; then the die base 23 is moved to the lower pressing head 111 of the workbench 11, and the die base 23 is clamped in the lower positioning groove 1111; then the manual rotating wheel 132 is rotated to move the upper pressing head 131 downward until the top of the die sleeve 21 is clamped in the upper positioning groove 1311; close the drain valve stem. 15, reciprocate and press the pressure handle 14 until the pressure gauge 17 shows a specified pressure value, and let it stand for a while; open the oil release valve stem 15, take out the mold 2 between the upper pressure head 131 and the lower pressure head 111, and replace the mold base 23 with the die withdrawal base 25; re-place the mold 2 with the die withdrawal base 25 on the lower pressure head 111 of the workbench 11, so that the die withdrawal base 25 is embedded in the lower positioning groove 1111; close the oil release valve stem 15, slowly turn the manual wheel 132 to continue to squeeze the die pressing head 22 for a distance, so that the die set 24 falls into the storage tank 252 of the die withdrawal base 25; finally, take out the tablet sample in the storage tank 252.

[0041] Embodiment 2:

[0042] For Example 2 of the utility model, Figure 7 , Figure 8 Note that description of parts that are not different from those in Embodiment 1 will be omitted and will be given the same reference numerals.

[0043] like Figure 7 , Figure 8 As shown, the utility model relates to a positionable powder tablet press, wherein the mold 2 also includes a die ejection seat 25, the die ejection seat 25 is in the shape of a ring table adapted to the closed cavity 212, and its inner diameter is adapted to the upper die piece 241 and the lower die piece 242, and the side wall of the die ejection seat 25 is provided with an opening, and its cross section is "C"-shaped, and the lower positioning groove 1111 is provided with a die ejection slot 1112 adapted to the die ejection seat 25.

[0044] In the specific use process, the steps before replacing the ejection seat 25 are the same as those in Example 1. After the ejection seat 25 is replaced, the overall mold 2 is placed on the lower pressure head 111 of the workbench 11, so that the ejection seat 25 is embedded in the ejection slot 1112, and then the oil drain valve stem 15 is closed, and the manual wheel 132 is slowly rotated to squeeze the die set 24 into the ejection seat 25. For details, please refer to Figure 8 The position state of the middle die set 24 , after taking out the mold 2 , the operator can manually take out the die set 24 and the pressed sample sandwiched between the upper die 241 and the lower die 242 through the opening of the ejection seat 25 .

[0045] In summary, the positionable powder tablet press provided by the utility model can eliminate the error of manual judgment of placement position, realize accurate positioning of the stamping die, thereby effectively avoiding damage to the die caused by placement position deviation and ensuring the quality of powder sample tableting.

[0046] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A locatable powder tablet press, characterized in that: include: A base (1), the base (1) comprising a workbench (11), a frame (12) mounted above the workbench (11), and a lead screw (13) movably mounted on the frame (12), an upper pressure head (131) being arranged at the bottom end of the lead screw (13), and a lower pressure head (111) being arranged on the upper end surface of the workbench (11); A mold (2), the mold (2) comprising a mold sleeve (21), a mold pressing head (22) and a mold base (23), the mold sleeve (21) being provided with an extrusion cavity (211) adapted to the mold pressing head (22), and a closed cavity (212) adapted to the mold base (23), the extrusion cavity (211) being connected to the closed cavity (212), and the cross section of the closed cavity (212) being larger than the cross section area of ​​the extrusion cavity (211); The lower end surface of the upper pressing head (131) is provided with an upper positioning groove (1311) adapted to the die pressing head (22), and the upper end surface of the lower pressing head (111) is provided with a lower positioning groove (1111) adapted to the die base (23), and the upper positioning groove (1311) and the lower positioning groove (1111) are coaxially arranged.

2. The positionable powder tablet press according to claim 1, characterized in that: The mold (2) further comprises a die set (24), wherein the die set (24) comprises an upper die (241) and a lower die (242), wherein a powder sample is arranged between the upper die (241) and the lower die (242), and the upper die (241) and the lower die (242) are both adapted to the extrusion cavity (211) so as to be able to move up and down in the extrusion cavity (211).

3. The positionable powder tablet press according to claim 2, characterized in that: The mold (2) further comprises a mold ejection seat (25), the mold ejection seat (25) being in the shape of a ring table adapted to the closed cavity (212), and having an inner diameter adapted to the upper mold piece (241) and the lower mold piece (242); The lower positioning groove (1111) is provided with a mold withdrawal slot (1112) adapted to the mold withdrawal seat (25).

4. The positionable powder tablet press according to claim 3, characterized in that: The side wall of the mold ejection seat (25) is provided with an opening, and its cross section is in a "C" shape.

5. The positionable powder tablet press according to claim 1, characterized in that: The mold (2) further comprises a demoulding seat (25), wherein the demoulding seat (25) is provided with a demoulding platform (251) adapted to the closed cavity (212), and the demoulding platform (251) is provided with a storage tank (252) for placing a tabletting sample, wherein the bottom surface of the storage tank (252) is in a spherical arc shape.

6. The positionable powder tablet press according to claim 1, characterized in that: The mold base (23) is provided with a boss (231), and the boss (231) is matched with the closed cavity (212), so that the mold sleeve (21) can be closed and sleeved on the mold base (23).

7. The positionable powder tablet press according to claim 1, characterized in that: The base (1) is provided with a hydraulic oil chamber inside, the workbench (11) is provided with a hydraulic oil cylinder connected to the hydraulic oil chamber, and the base (1) is provided with a pressurizing handle (14) connected to the hydraulic oil chamber, so that the upward extrusion of the lower pressure head (111) can be achieved through the pressurization of the pressurizing handle (14).

8. The positionable powder tablet press according to claim 7, characterized in that: The base (1) is also provided with an oil drain valve stem (15) connected to the hydraulic oil chamber, an oil filling screw (16), and a pressure gauge (17).

9. The positionable powder tablet press according to claim 1, characterized in that: The lead screw (13) is threadably connected to the platform (12), and a manual rotating wheel (132) is provided at the top end of the lead screw (13).

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