CN112895567B

CN112895567B - Powder tablet press

Info

Publication number: CN112895567B
Application number: CN202110060961.1A
Authority: CN
Inventors: 牛晓东
Original assignee: Chongqing Medical and Pharmaceutical College
Current assignee: Chongqing Medical and Pharmaceutical College
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2023-02-10
Anticipated expiration: 2041-01-18
Also published as: CN112895567A

Abstract

The invention belongs to the technical field of presses, and provides a powder tablet press which comprises a die and a pressure head, wherein the die comprises a die holder and an upper die, a forming hole is formed in the die holder, and the upper die comprises a base, a first pressing block, a second pressing block and a first screw rod. According to the powder tablet press provided by the invention, the first pressing block can move upwards through the first screw, so that a gap is generated between the first pressing block and the second pressing block, meanwhile, the pressing part on the second pressing block moves upwards, so that the second pressing block is ensured not to generate scratches on the upper surface of a pressed flaky raw material in the process of swinging around the hinge center of the second pressing block, the second pressing block is also ensured to smoothly swing around the hinge center of the second pressing block, and finally, an upper die can be easily taken down only by moving the first pressing block upwards for a small distance.

Description

Powder tablet press

Technical Field

The invention relates to the technical field of press machines, in particular to a powder tablet press machine.

Background

The powder tablet press is one of the necessary equipments for processing granular raw materials into tablets or granules in the industries of pharmaceutical chemical industry, food, electronics, etc. It is suitable for tablet pressing, coal contact, sugar tablet, calcium tablet, coffee tablet, powder metallurgy, electronic element, various agricultural chemical fertilizer tablet, etc. in small production, laboratory, hospital, etc.

The manual powder tablet press is commonly used in laboratories at present, and the die structure of the manual powder tablet press mainly comprises a die holder, an upper die and a lower die, wherein the die holder is provided with a forming hole, and the upper die and the lower die can be partially inserted into the forming hole, so that when the upper die is subjected to downward positive pressure, the upper die and the lower die extrude powdery raw materials in the forming hole into a sheet shape together. Because pour powdery raw material into the in-process in shaping hole, partial powdery raw material adhesion is at shaping downthehole wall to can be extruded between cope match-plate pattern outer wall and shaping downthehole wall, and then when taking off the flaky raw materials that will press, can increase the degree of difficulty that will go up the mould and extract from the shaping hole.

Disclosure of Invention

In view of the drawbacks of the prior art, it is an object of the present invention to provide a powder tablet press for facilitating the extraction of an upper die from a forming hole.

In order to achieve the purpose, the invention provides a powder tablet press which comprises a die and a pressure head, wherein the die comprises a die holder and an upper die, the die holder is provided with a forming hole, and the upper die comprises a base, a first pressing block, a second pressing block and a first screw rod;

the first pressing block is arranged below the base and is in sliding connection with the base in the vertical direction, the cross section of the first pressing block is in a cross shape, the external profile area of the cross section of the first pressing block is gradually increased from bottom to top, the first pressing block is provided with four first peripheral surfaces and eight first side surfaces, the first peripheral surfaces are distributed in the vertical direction and are matched with the forming holes, two sides of each first peripheral surface are respectively intersected with one first side surface, and each first side surface is an inclined plane;

the second pressing block is arranged below the base, four second pressing blocks are distributed along the circumferential direction of the first pressing block, the external contour area of the cross section of each second pressing block is gradually reduced from bottom to top, each second pressing block is provided with a second peripheral surface and two second side surfaces, the second peripheral surfaces are distributed along the vertical direction, the second peripheral surfaces are matched with the forming holes, one ends of the two second side surfaces are crossed, the other ends of the two second side surfaces are respectively crossed with two ends of the second peripheral surface, each second side surface is an inclined plane, one second side surface corresponds to one first side surface, the inclination degree of the second side surface is the same as that of the corresponding first side surface, each second pressing block comprises an installation part and a pressing part, the installation part is located above, the inner side of the top of the installation part is hinged with the bottom of the base, a positioning column is arranged on the outer side of the installation part, the pressing part is connected with the installation part in a sliding mode and slides along an inclined plane, and the pressing part has the tendency of moving towards the inner side;

when the first side surface is overlapped with the corresponding second side surface, the bottom surface of the first pressing block is overlapped with the bottom surface of the second pressing block, and the upper end of the positioning column is abutted to the bottom of the base;

one end of the first screw rod penetrates through the base and then is in threaded connection with the first pressing block.

Furthermore, the bottom of the mounting part is provided with a chute which is sunken upwards, one end of the chute is provided with a second threaded hole, the second peripheral surface is provided with a mounting hole communicated with the other end of the chute, the mounting hole and the second threaded hole are coaxially arranged, the diameter of the mounting hole is larger than that of the second threaded hole, and the top of the compression part is provided with a sliding part positioned in the chute; the second compact heap still includes second screw rod and reset spring, the pole portion of second screw rod pass behind the sliding part with second screw hole threaded connection, the head of second screw rod is located in the mounting hole, the sliding part with the pole portion sliding connection of second screw rod, the reset spring cover is established on the pole portion of second screw rod, reset spring's one end with the sliding part butt.

Furthermore, a guide post is arranged at the top of the first pressing block, and a guide hole matched with the guide post is formed in the base.

Further, the pressure head is provided with an accommodating cavity for accommodating the first screw.

The invention has the beneficial effects that: according to the powder tablet press provided by the invention, the first pressing block can move upwards through the first screw, so that a gap is generated between the first pressing block and the second pressing block, meanwhile, the pressing part on the second pressing block moves upwards, so that the second pressing block is ensured not to generate scratches on the upper surface of a pressed flaky raw material in the process of swinging around the hinge center of the second pressing block, the second pressing block is also ensured to smoothly swing around the hinge center of the second pressing block, and finally, an upper die can be easily taken down only by moving the first pressing block upwards for a small distance.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a powder tablet press according to an embodiment of the present invention;

FIG. 2 is a perspective view of the mold;

FIG. 3 is a perspective view of a first compact;

fig. 4 is a perspective view of a second compact;

FIG. 5 is a cross-sectional view of the second compact;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a perspective view of the base;

fig. 8 is a schematic view of a portion of the powder tableting machine shown in fig. 1.

Reference numerals:

10. a body; 11. a work table; 111. a groove; 12. a pressure gauge; 13. manually pressing the handle; 14. a mounting frame; 21. a pressure head; 211. an accommodating chamber; 22. a lead screw; 23. a hand wheel; 30. a mold; 31. a die holder; 311. forming holes; 32. an upper die; 33. a lower die; 40. a sheet-like raw material; 51. a base; 511. a through hole; 512. a guide post; 52. a first compact block; 521. a first peripheral surface; 522. a first side surface; 523. a guide bar; 524. a first threaded hole; 53. a first screw; 60. a second compact block; 61. an installation part; 611. a chute; 612. a second threaded hole; 613. mounting holes; 62. a pressing part; 621. a sliding part; 63. a second peripheral surface; 64. a second side surface; 65. a positioning column; 66. a second screw; 67. a return spring.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 8, the present embodiment provides a powder tablet press including a body 10, a table 11 capable of being lifted and lowered, a die 30, and a ram 21.

The worktable 11 is installed on the machine body 10, and the machine body 10 is provided with a pressure gauge 12, a manual pressing handle 13 and the like. The lifting can be realized under the driving of hydraulic pressure. The mould 30 is placed on the workstation 11, and the pressure head 21 is located the top of mould 30, and the pressure head 21 is installed at the lower extreme of lead screw 22, lead screw 22 with fix the mounting bracket 14 threaded connection on organism 10, the hand wheel 23 is installed to the upper end of lead screw 22, realizes the lift of lead screw 22 through rotating hand wheel 23 to drive pressure head 21 and go up and down.

The mold 30 includes a mold base 31, an upper mold 32 and a lower mold 33, the mold base 31 has a molding hole 311, the molding hole 311 is a through hole 511, and in this embodiment, the molding hole 311 is preferably the through hole 511. The lower die 33 is inserted into a lower portion of the molding hole 311, and the upper die 32 is inserted into an upper portion of the molding hole 311, and presses the powder put into the molding hole 311 in a sheet shape by an external force.

The upper die 32 includes a base 51, a first pressing block 52, a second pressing block 60, and a first screw 53, and both the first pressing block 52 and the second pressing block 60 are disposed below the base 51.

The first pressing block 52 is slidably connected to the base 51 in the vertical direction, and preferably, a guide post 523 is fixed to the top of the first pressing block 52, a guide hole 512 matched with the guide post 523 is formed in the base 51, and the upper end of the guide post 523 is inserted into the guide hole 512, so as to guide the sliding of the first pressing block 52. The cross section of the first pressing block 52 is overall in a cross shape, and the external contour area of the cross section of the first pressing block 52 is gradually increased from bottom to top. The first pressing block 52 has four first peripheral surfaces 521 and eight first side surfaces 522, the first peripheral surfaces 521 are distributed along the vertical direction, and the first peripheral surfaces 521 are adapted to the forming holes 311. Each first circumferential surface 521 corresponds to two second side surfaces 64, two sides of the first circumferential surface 521 intersect with one first side surface 522, and the first side surface 522 is an inclined plane.

The second pressing blocks 60 have four blocks, and the four second pressing blocks 60 are distributed along the circumferential direction of the first pressing block 52 and are located at vacant positions between two adjacent first circumferential surfaces 521 on the first pressing block 52. The outer contour area of the cross section of the second pressing block 60 decreases gradually from bottom to top, the second pressing block 60 has a second circumferential surface 63 and two second side surfaces 64, the second circumferential surface 63 is distributed along the vertical direction, and the second circumferential surface 63 is adapted to the forming hole 311. One end of each of the two second side surfaces 64 intersects with the other end of the second peripheral surface 63, the second side surfaces 64 are inclined planes, one second side surface 64 corresponds to one first side surface 522, and the inclination degree of each second side surface 64 is the same as that of the corresponding first side surface 522.

The second pressing block 60 comprises an upper mounting part 61 and a lower pressing part 62, the inner side of the top of the mounting part 61 is hinged with the bottom of the base 51, and the outer side is provided with a positioning column 65, preferably, the hinge center line of the mounting part 61 and the base 51 is tangent with a circle, and the center line of the circle is coincident with the axis of the first pressing block 52. The pressing portion 62 is slidably coupled to the mounting portion 61 and slides along an inclined plane, and the pressing portion 62 tends to move inward and also moves upward while the pressing portion 62 moves inward.

When the first side surface 522 is overlapped with the corresponding second side surface 64, the bottom surface of the first pressing block 52 is overlapped with the bottom surface of the second pressing block 60, and the upper end of the positioning column 65 is abutted with the bottom of the base 51. So that the first pressing block 52 and the four second pressing blocks 60 are spliced into a cylinder, and the diameter of the cylinder is the same as the inner diameter of the forming hole 311. And the positioning column 65 ensures that the first pressing block 52 and the second pressing block 60 can be just spliced into a cylinder.

One end of the first screw 53 is threaded with the first pressing block 52 after passing through the base 51, and preferably, a through hole 511 for passing the first screw 53 is formed in the base 51, and the diameter of the through hole 511 is larger than that of the first screw 53. A first screw hole 524 which is in threaded connection with the first screw 53 is formed in the middle of the first pressing block 52.

In this embodiment, the bottom surface of the first pressing block 52 and the bottom surface of the second pressing block 60 are overlapped by rotating the first screw 53, at this time, the upper die 32 is in the first working state, then the upper die 32 is inserted into the forming hole 311 filled with the powdery raw material, the pressing head 21 is shaken down by the hand wheel 23 to press the base 51 by the pressing head 21, then the table 11 is raised by manually pressing the handle 13, when the pressure value on the pressure gauge 12 reaches a certain value, the pressurization is stopped, and then the pressure is released by the pressure release valve on the base, so that the table 11 is automatically lowered. Then, the lower die 33 is taken out of the die holder 31, and then the first screw 53 is rotated to lift the first pressing block 52 upwards by a certain height, so that the first pressing block 52 is easy to move upwards due to the special structure of the first pressing block 52 and the second pressing block 60. In the process that the first pressing block 52 moves upward, the pressing portion 62 on the second pressing block 60 moves inward and also moves upward, so that the bottom surface of the second pressing block 60 is separated from the upper surface of the sheet-like raw material 40, and meanwhile, a gap is formed between the first pressing block 52 and the second pressing block 60, so that the second pressing block 60 slightly swings around the hinge center, and the second circumferential surface 63 of the second pressing block 60 is gradually separated from the inner wall of the forming hole 311. During the swinging of the second pressing block 60 about the hinge center, since the pressing portion 62 has been raised upward by a certain height, the second pressing block 60 does not leave a scratch on the upper surface of the pressed sheet-like raw material 40. By the above operation, finally, the upper die 32 can be easily removed by the experimenter.

In one embodiment, the bottom of the mounting portion 61 is formed with an upwardly concave sliding slot 611, one end of the sliding slot 611 is formed with a second threaded hole 612, the extending direction of the sliding slot 611 is the same as the sliding direction of the pressing portion 62, therefore, the sliding slot 611 is also inclined, and the upper end of the sliding slot 611 is formed with the second threaded hole 612. The second peripheral surface 63 is provided with a mounting hole 613 communicated with the other end (i.e., the lower end) of the sliding groove 611, the mounting hole 613 and the second threaded hole 612 are coaxially arranged, the diameter of the mounting hole 613 is larger than that of the second threaded hole 612, the top of the pressing portion 62 is provided with a sliding portion 621 located in the sliding groove 611, and the sliding portion 621 and the pressing portion 62 are integrally formed.

The second pressing block 60 further includes a second screw 66 and a return spring 67, a rod portion of the second screw 66 penetrates through the sliding portion 621 and then is in threaded connection with the second threaded hole 612, a head portion of the second screw 66 is located in the mounting hole 613, the sliding portion 621 is in sliding connection with the rod portion of the second screw 66, the return spring 67 is sleeved on the rod portion of the second screw 66, and one end of the return spring 67 abuts against the sliding portion 621. While the first pressing block 52 is moved upward to create a gap with the second pressing block 60, the return spring 67 urges the pressing blocks to move inward.

Through the arrangement, the pressing part 62 is ensured to have the tendency of moving inwards, and the assembly between the pressing part 62 and the mounting part 61 is facilitated.

In one embodiment, the pressing head 21 has a receiving cavity 211 for receiving the first screw 53, which is simple in structure and can prevent the pressing head 21 from pressing the first screw 53. A groove 111 is preferably made in the table 11, adapted to the bottom of the lower die 33, to ensure that the ram 21 is pressed accurately against the base 51 each time, avoiding the first screw 53.

In the description of the present invention, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. The utility model provides a powder tablet press, includes mould and pressure head, the mould includes the die holder and goes up the mould, it has shaping hole, its characterized in that to open on the die holder: the upper die comprises a base, a first pressing block, a second pressing block and a first screw rod;

when the first side surface is overlapped with the corresponding second side surface, the bottom surface of the first pressing block is overlapped with the bottom surface of the second pressing block, and the upper end of the positioning column is abutted against the bottom of the base;

one end of the first screw rod penetrates through the base and then is in threaded connection with the first pressing block;

the bottom of the mounting part is provided with an upward sunken sliding chute, one end of the sliding chute is provided with a second threaded hole, the second peripheral surface is provided with a mounting hole communicated with the other end of the sliding chute, the mounting hole and the second threaded hole are coaxially arranged, the diameter of the mounting hole is larger than that of the second threaded hole, and the top of the compression part is provided with a sliding part positioned in the sliding chute; the second compact heap still includes second screw rod and reset spring, the pole portion of second screw rod pass behind the sliding part with second screw hole threaded connection, the head of second screw rod is located in the mounting hole, the sliding part with the pole portion sliding connection of second screw rod, the reset spring cover is established on the pole portion of second screw rod, reset spring's one end with the sliding part butt.

2. A powder tablet press according to claim 1, wherein: the top of first compact heap is provided with the guide post, open on the base have with guide post matched with guiding hole.

3. A powder tablet press according to claim 2, wherein: the pressure head is provided with an accommodating cavity for accommodating the first bolt.