Porous pressed powder pressing mold capable of automatically controlling temperature

Abstract

The utility model discloses an automatic temperature control porous pressed powder pressing die which comprises an upper pressing die and a lower pressing die which are correspondingly arranged, a middle die is arranged between the upper pressing die and the lower pressing die, a plurality of shaped holes are formed in the middle die, the upper pressing die extends to the inner sides of the tops of the shaped holes, and the lower pressing die can extend to the inner sides of the bottoms of the shaped holes. A pressing cavity is formed between the upper pressing die and the lower pressing die in the shaped hole to press the pressed powder; a shaped hole heating piece is arranged around the shaped hole in the middle mold; according to the utility model, a plurality of pressed powder cakes can be processed in a hot-pressing manner at the same time, and are uniformly heated in the hot-pressing process, so that the heating consistency of the pressed powder cakes in the pressed forming process is ensured, and the final forming quality of the pressed powder cakes is further ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder cake pressing processing and relates to a porous powder cake pressing die with automatic temperature control. Background Art

[0002] A powder pressing die is a device used to pressurize powder so that the powder is pressed into a dense powder structure. Traditional powder pressing dies are formed by applying pressure to the die through a tablet press, and the pressure is transferred to the powder through the die to press the powder into shape. In order to improve the quality of the powder in forming, the existing pressing die will set a heating block on the pressure head of the tablet press during the powder pressing process, and heat the pressing die by heat conduction, so that the heat is transferred to the powder inside the pressing die, thereby achieving hot pressing of the powder. However, the heating temperature of the existing heating block is fixed, and because the shapes and specifications of the pressing dies are different, the heat of the heating block cannot be evenly transferred to the powder. At the same time, the heat transfer process is greatly affected by the shape and material of the pressing die, which will cause the problem of uneven heating of the powder. Especially in the process of pressing several powders at the same time, the structure of the existing pressing die and the heating block cannot guarantee the heating consistency of the powder by the die, which ultimately results in uneven quality of the powder.

[0003] Therefore, in order to solve the above-mentioned technical problems existing in the existing pressing mold and heating block for hot pressing powder, the utility model discloses a porous powder cake pressing mold with automatic temperature control. Utility Model Content

[0004] The purpose of the utility model is to provide a porous powder compacting die with automatic temperature control, which can simultaneously hot-press a plurality of powder compacts and uniformly heat the plurality of powder compacts during the hot-pressing process, thereby ensuring the heating consistency of each powder compact during the pressing and forming process, and thus ensuring the quality of the final formed powder compacts.

[0005] The utility model is achieved through the following technical solutions:

[0006] A porous powder compacting die with automatic temperature control comprises an upper die and a lower die arranged correspondingly, a middle die being arranged between the upper and lower dies, a plurality of shaped holes being provided on the middle die, the upper die extending to the inner side of the top of the shaped holes, and the lower die being able to extend to the inner side of the bottom of the shaped holes; a pressing cavity is formed between the upper die and the lower die inside the shaped holes for pressing the powder compact; a shaped hole heating element is provided inside the middle die so that the powder compact can be heated evenly.

[0007] Install the extrusion end of the lower die to the bottom inner side of the shaped hole on the middle die, then add powder from the top of the shaped hole to the inside of the shaped hole and flatten the powder. Then install the extrusion end of the upper die to the top inner side of the shaped hole on the middle die, and heat the shaped hole through the shaped hole heater located around the shaped hole inside the middle die, so that the powder inside the shaped hole is heated to the calibrated temperature at a certain heating rate. Then, a tablet press applies downward pressure to the upper die, and the powder inside the shaped hole is hot-pressed into shape by the cooperation of the upper die and the lower die. After the powder is pressed into shape, the upper die and the lower die are disassembled, and the powder cake formed inside the shaped hole is pushed out of the die.

[0008] In order to better realize the present invention, further, the distance between the shaped hole heating element and each shaped hole is equal, so that the powder cake can be heated evenly.

[0009] In order to better realize the present invention, it further includes a temperature controller, which is connected to the shaped hole heater through a cable to adjust the heating rate and heating temperature of the shaped hole heater.

[0010] In order to better realize the present utility model, further, the shaped hole heating element includes an electric heating rod and a thermocouple, a heating hole is arranged around the shaped hole inside the middle mold, an electric heating rod and a thermocouple are arranged inside the heating hole, and the electric heating rod and the thermocouple are both connected to the temperature controller.

[0011] In order to better realize the present utility model, further, the middle mold includes a forming mold and a demolding ring, the forming mold is provided with a plurality of shaped holes, the top outer surface of the forming mold is provided with an external thread, the demolding ring is connected with the corresponding thread of the external thread, and the position of the shaped hole on the demolding ring is provided with a through hole.

[0012] In order to better realize the present utility model, further, the forming mold includes an intermediate disk, a top positioning disk, and a bottom positioning disk. A plurality of shaped holes are provided between the top and bottom surfaces of the intermediate disk. A shaped hole heating element is provided inside the intermediate disk. The top of the intermediate disk is coaxially mounted with a top positioning disk. The top thread of the top positioning disk is provided with a demolding ring. The bottom of the intermediate disk is coaxially mounted with a bottom positioning disk. Positioning step holes are provided on the top positioning disk and the bottom positioning disk at the positions corresponding to the shaped holes.

[0013] In order to better realize the present invention, further, a top sealing ring is provided around the top of the shaped hole between the bottom end surface of the top positioning plate and the top end surface of the intermediate plate, and a bottom sealing ring is provided around the bottom of the shaped hole between the bottom end surface of the intermediate plate and the top end surface of the bottom positioning plate.

[0014] In order to better realize the present invention, further, the upper die includes an upper pressure plate and an upper pressure head. Several upper pressure heads are provided at the bottom of the upper pressure plate corresponding to the position of the shaped hole, and the bottom end of the upper pressure head extends to the inner side of the top of the shaped hole.

[0015] In order to better realize the present invention, further, the lower pressing die includes a lower pressing plate and a lower pressing head. A plurality of lower pressing heads are provided on the top of the lower pressing plate at positions corresponding to the shaped holes, and the top ends of the lower pressing heads extend to the inner side of the bottom of the shaped holes.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] The utility model realizes pressing and forming of the parts inside the shaped holes by arranging a plurality of shaped holes on the middle mold and cooperating with the upper pressing mold and the lower pressing mold on the upper and lower sides of the middle mold. At the same time, during the pressing process, each shaped hole is heated synchronously and controllably by a shaped hole heating element which is directly arranged inside the middle mold and is equidistant from each shaped hole, so that the parts inside each shaped hole are evenly heated to a predetermined suitable temperature range at the same heating rate, thereby ensuring that the final pressed powder cake has excellent forming quality and the forming quality consistency of multiple powder cakes is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the explosion structure of the porous powder compact pressing die;

[0019] Figure 2 This is a schematic diagram of the assembly structure of the porous powder pressing mold;

[0020] Figure 3 is a cross-sectional view of the porous powder compact pressing mold along the first median vertical plane;

[0021] Figure 4 is a cross-sectional view of the porous powder compact pressing die along the second median vertical plane;

[0022] Figure 5 Schematic diagram of the structure of the upper die;

[0023] Figure 6 Schematic diagram of the structure of the lower die;

[0024] Figure 7 Schematic diagram of the structure of the middle mold;

[0025] Figure 8 Schematic diagram of the structure of the shaped hole heating element.

[0026] Among them: 1-upper die; 2-lower die; 3-middle die; 4-shaped hole; 5-shaped hole heating element; 11-upper platen; 12-upper pressure head; 21-lower platen; 22-lower pressure head; 31-forming die; 32-mold release ring; 51-electric heating rod; 52-thermocouple; 311-middle plate; 312-top positioning plate; 313-bottom positioning plate. DETAILED DESCRIPTION

[0027] The following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly specified in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] For the convenience of description, if the words "up", "down", "left" and "right" appear in this utility model, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the utility model.

[0030] Explanation of terms: The terms "install", "connect", "connect", "fix" and so on in this utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection, a direct connection or an indirect connection through an intermediate medium, an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0031] Example 1:

[0032] The present embodiment is a porous powder cake pressing mold with automatic temperature control, such as Figure 1-Figure 4As shown, it includes an upper die 1 and a lower die 2 that are correspondingly arranged, a middle die 3 is arranged between the upper die 1 and the lower die 2, and a plurality of shaped holes 4 are provided on the middle die 3. The upper die 1 extends to the inner side of the top of the shaped hole 4, and the lower die 2 can extend to the inner side of the bottom of the shaped hole 4; inside the shaped hole 4, a pressing cavity is formed between the upper die 1 and the lower die 2 to press the powder cake; a shaped hole heating element 5 is provided inside the middle die 3 to enable the powder cake to be evenly heated.

[0033] Furthermore, the distance between the shaped hole heater 5 and each shaped hole 4 is equal, thereby ensuring that the pressed powder can be heated evenly and the molding consistency of the pressed powder is ensured.

[0034] like Figure 1 As shown, four shaped holes 4 are evenly distributed along the circumference between the top and bottom surfaces of the middle die 3. The contours of the shaped holes 4 correspond to the contours of the formed compact. The bottom of the upper die 1 and the top of the lower die 2 are both provided with extrusion tips corresponding to the shaped holes 4. The contours of the extrusion tips correspond to the contours of the formed compact.

[0035] like Figure 1 and Figure 2 As shown, a group of shaped hole heaters 5 is disposed at the center of the middle mold 3. The distances between the shaped hole heaters 5 and the four shaped holes 4 are equal, ensuring that the shaped hole heaters 5 can uniformly and synchronously heat the four shaped holes 4, and preventing the temperature rise rates of the four shaped holes 4 from varying due to distance differences. The shaped hole heaters 5 are not limited to being disposed in one group; a group of shaped hole heaters 5 can also be disposed around each shaped hole 4, corresponding to the number of shaped holes 4. The specific number and location of the shaped hole heaters 5 are adjusted according to the size and specifications of the mold.

[0036] After the powder is evenly added to the interior of the shaped hole 4 and then heated to a preset initial temperature by the shaped hole heater 5, a tablet press applies downward pressure to the upper die 1, and the extrusion ends of the upper die 1 and the lower die 2 cooperate to hot-press the powder inside the shaped hole 4. After the powder cake is formed, the upper and lower dies 1 and 2 are disassembled, and the extrusion end of the lower die 2 is reversed and installed inside the top of the shaped hole 4. The tablet press then gently presses the lower die 2 to extrude the powder cake formed inside the shaped hole 4 and remove it from the mold.

[0037] Furthermore, a temperature controller is included, which is connected to the hole heater 5 via a cable to adjust the heating rate and temperature of the hole heater 5. The temperature controller can control the heating rate and final heating temperature of the hole 4 by the hole heater 5 in real time, so that the powder inside the hole 4 is maintained in a suitable temperature range.

[0038] Example 2:

[0039] An automatic temperature-controlled porous powder pressing mold is improved on the basis of Example 1, as shown in FIG. Figure 8 As shown, the shaped hole heating element 5 includes an electric heating rod 51 and a thermocouple 52. A heating hole is provided inside the middle mold 3 around the shaped hole 4. An electric heating rod 51 and a thermocouple 52 are provided inside the heating hole. The electric heating rod 51 and the thermocouple 52 are both connected to the temperature controller.

[0040] like Figure 1 As shown, a heating hole is provided in the middle position of the middle mold 3 to ensure that the distance from the heating hole to the four shaped holes 4 is equal. An electric heating rod 51 and a thermocouple 52 are inserted in the heating hole. The four shaped holes 4 are heated synchronously by the electric heating rod 51. At the same time, the current temperature of the middle mold 3 is detected by the thermocouple 52, and the detected temperature data is fed back to the temperature controller so that the temperature controller can adjust the heating power of the electric heating rod 51 in real time.

[0041] The rest of this embodiment is the same as that of embodiment 1, so it will not be described again.

[0042] Example 3:

[0043] An automatic temperature-controlled porous powder pressing mold is improved on the basis of Example 1 or 2, such as Figure 3 As shown, the middle mold 3 includes a forming mold 31 and a demolding ring 32. The forming mold 31 is provided with a plurality of shaped holes 4. The top outer surface of the forming mold 31 is provided with an external thread. The demolding ring 32 is connected with the corresponding thread of the external thread. A through hole is provided on the demolding ring 32 at the position corresponding to the shaped hole 4.

[0044] After the powder inside the shaped hole 4 is hot-pressed, the demoulding ring 32 is rotated to lift the demoulding ring 32 upward, and the upper die 1 is lifted upward by the lifting of the demoulding ring 32, so that the extrusion end of the upper die 1 can be smoothly removed from the inside of the shaped hole 4.

[0045] The rest of this embodiment is the same as that of embodiment 1 or 2, and thus will not be described in detail.

[0046] Example 4:

[0047] An automatic temperature-controlled porous powder pressing mold is improved on the basis of any one of Examples 1-3, such as Figure 4 As shown, the forming mold 31 includes an intermediate disk 311, a top positioning disk 312, and a bottom positioning disk 313. A plurality of shaped holes 4 are provided between the top and bottom surfaces of the intermediate disk 311. A shaped hole heating element 5 is provided inside the intermediate disk 311. The top of the intermediate disk 311 is coaxially mounted with a top positioning disk 312. The top thread of the top positioning disk 312 is provided with a demolding ring 32. The bottom of the intermediate disk 311 is coaxially mounted with a bottom positioning disk 313. Positioning step holes are provided on the top positioning disk 312 and the bottom positioning disk 313 at the positions corresponding to the shaped holes 4.

[0048] The extrusion end of the upper die 1 passes through the positioning step hole on the top positioning plate 312 and extends to the top inner side of the shaped hole 4 on the middle plate 311. The extrusion end of the lower die 2 passes through the positioning step hole on the bottom positioning plate 313 and extends to the bottom inner side of the shaped hole 4 on the middle plate 311. The positioning step hole guides and positions the extrusion end, ensuring that the extrusion end can smoothly enter the shaped hole 4. At the same time, by providing the top positioning plate 312 and the bottom positioning plate 313, the pressure applied by the tablet press is prevented from directly acting on the middle plate 311, thereby extending the service life of the middle plate 311.

[0049] Further, such as Figure 7 As shown, a top sealing ring 100 is provided between the bottom end surface of the top positioning disk 312 and the top end surface of the intermediate disk 311, around the top of the shaped hole 4. A bottom sealing ring 200 is provided between the bottom end surface of the intermediate disk 311 and the top end surface of the bottom positioning disk 313, around the bottom of the shaped hole 4. A top groove is provided on the top end surface of the intermediate disk 311, coaxially with the shaped hole 4. A bottom groove is provided on the bottom end surface of the intermediate disk 311, coaxially with the shaped hole 4. The top sealing ring 100 is installed in the top groove, and the bottom sealing ring 200 is installed in the bottom groove. The provision of the top sealing ring 100 and the bottom sealing ring 200 ensures the sealing of the contact surfaces between the top positioning disk 312 and the intermediate disk 311, and between the bottom positioning disk 313 and the intermediate disk 311, thereby preventing powder leakage from the shaped hole 4.

[0050] The rest of this embodiment is the same as any one of Embodiments 1-3, so it will not be described again.

[0051] Example 5:

[0052] An automatic temperature-controlled porous powder pressing mold is improved on the basis of any one of Examples 1-4, such as Figure 5 As shown, the upper die 1 includes an upper pressing plate 11 and an upper pressing head 12. A plurality of upper pressing heads 12 are provided at the bottom of the upper pressing plate 11 corresponding to the position of the shaped hole 4, and the bottom end of the upper pressing head 12 extends to the inner side of the top of the shaped hole 4.

[0053] A stepped hole is provided on the top of the upper platen 11, and a positioning hole is provided on the bottom of the upper platen 11 coaxially with the stepped hole, and both the stepped hole and the positioning hole are coaxially provided with the shaped hole 4. The top of the upper pressing head 12 cooperates with the positioning hole to realize the rapid positioning of the position of the upper pressing head 12. A connecting threaded hole is provided at the center of the top of the upper pressing head 12. A screw is inserted through the stepped hole and docked with the connecting threaded hole at the top of the upper pressing head 12 to realize the rapid positioning and installation of the upper pressing head 12 at the bottom of the upper platen 11. The bottom end of the upper pressing head 12 extends to the inside of the shaped hole 4 to apply pressure to the powder.

[0054] like Figure 6As shown, the lower pressing die 2 includes a lower pressing plate 21 and a lower pressing head 22. A plurality of lower pressing heads 22 are provided on the top of the lower pressing plate 21 corresponding to the position of the shaped hole 4. The top of the lower pressing head 22 extends to the inner side of the bottom of the shaped hole 4.

[0055] The bottom of the lower platen 21 is provided with a stepped hole, and the top of the lower platen 21 is provided with a positioning hole coaxially with the stepped hole, and both the stepped hole and the positioning hole are coaxially provided with the shaped hole 4. The bottom end of the lower pressing head 22 cooperates with the positioning hole to realize the rapid positioning of the position of the lower pressing head 22. A connecting threaded hole is provided at the center of the bottom of the lower pressing head 22. A screw is inserted through the stepped hole and docked with the connecting threaded hole at the bottom of the lower pressing head 22 to realize the rapid positioning and installation of the lower pressing head 22 on the top of the lower platen 21. The top end of the lower pressing head 22 extends to the inside of the shaped hole 4 to cooperate with the upper pressing head 12 to apply pressure to the powder.

[0056] The rest of this embodiment is the same as any one of Embodiments 1-4, and therefore will not be described in detail.

[0057] The above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the present invention.

Claims

1. A porous powder compacting die with automatic temperature control, comprising an upper pressing die (1) and a lower pressing die (2) arranged accordingly, characterized in that: A middle die (3) is provided between the upper die (1) and the lower die (2), and a plurality of shaped holes (4) are provided on the middle die (3). The upper die (1) extends to the inner side of the top of the shaped hole (4), and the lower die (2) can extend to the inner side of the bottom of the shaped hole (4). A pressing cavity is formed between the upper die (1) and the lower die (2) inside the shaped hole (4) to press the powder cake. A shaped hole heating element (5) is provided inside the middle die (3) so that the powder cake can be heated evenly.

2. The automatic temperature-controlled porous powder pressing mold according to claim 1, characterized in that: The distance between the shaped hole heating element (5) and each shaped hole (4) is equal.

3. The automatic temperature-controlled porous powder pressing mold according to claim 2, characterized in that: It also includes a temperature controller, which is connected to the shaped hole heating element (5) via a cable to regulate the heating rate and heating temperature of the shaped hole heating element (5).

4. The automatic temperature-controlled porous powder pressing die according to claim 3, characterized in that: The shaped hole heating element (5) comprises an electric heating rod (51) and a thermocouple (52); a heating hole is provided inside the middle mold (3) around the shaped hole (4); an electric heating rod (51) and a thermocouple (52) are provided inside the heating hole; and the electric heating rod (51) and the thermocouple (52) are both connected to a temperature controller.

5. The automatic temperature-controlled porous powder pressing die according to any one of claims 1 to 4, characterized in that: The middle mold (3) comprises a forming mold (31) and a demoulding ring (32). The forming mold (31) is provided with a plurality of shaped holes (4). An external thread is provided on the top outer surface of the forming mold (31). The demoulding ring (32) is threadedly connected to the external thread. A through hole is provided on the demoulding ring (32) at a position corresponding to the shaped holes (4).

6. The automatic temperature-controlled porous powder pressing die according to claim 5, characterized in that: The forming die (31) comprises an intermediate disk (311), a top positioning disk (312), and a bottom positioning disk (313); a plurality of shaped holes (4) are provided between the top and bottom surfaces of the intermediate disk (311); a shaped hole heating element (5) is provided inside the intermediate disk (311); a top positioning disk (312) is coaxially mounted on the top of the intermediate disk (311); a demoulding ring (32) is threadedly mounted on the top of the top positioning disk (312); and a bottom positioning disk (313) is coaxially mounted on the bottom of the intermediate disk (311); positioning step holes are provided on both the top positioning disk (312) and the bottom positioning disk (313) at positions corresponding to the shaped holes (4).

7. The automatic temperature-controlled porous powder pressing die according to claim 6, characterized in that: A top sealing ring (100) is provided between the bottom end surface of the top positioning plate (312) and the top end surface of the intermediate plate (311) and around the top of the shaped hole (4); a bottom sealing ring (200) is provided between the bottom end surface of the intermediate plate (311) and the top end surface of the bottom positioning plate (313) and around the bottom of the shaped hole (4).

8. The automatic temperature-controlled porous powder pressing die according to any one of claims 1 to 4, characterized in that: The upper pressing die (1) comprises an upper pressing plate (11) and an upper pressing head (12). A plurality of upper pressing heads (12) are provided at the bottom of the upper pressing plate (11) at positions corresponding to the shaped holes (4). The bottom ends of the upper pressing heads (12) extend to the inner side of the top of the shaped holes (4).

9. The automatic temperature-controlled porous powder pressing die according to any one of claims 1 to 4, characterized in that: The lower pressing die (2) comprises a lower pressing plate (21) and a lower pressing head (22). A plurality of lower pressing heads (22) are provided at the top of the lower pressing plate (21) at positions corresponding to the shaped holes (4). The top ends of the lower pressing heads (22) extend to the inner side of the bottom of the shaped holes (4).

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