A high-strength ceramic preparation mold

Abstract

This utility model discloses a high-strength ceramic preparation mold, relating to the field of mold technology. The utility model includes a template and a lower punch, as well as a fixed seat, a buffer, a connecting seat, an upper punch, and a pressure sensor. The utility model uses a return spring to push a limiting slider, causing it to slide along the guide of a limiting rod and insert into the slot. At this time, the connecting seat and the fixed seat are connected. The pushing device controls the fixed seat to move up and down, driving the upper punch at the bottom of the connecting seat to dry-press the ceramic powder. An electromagnet is activated, causing it to repel the strong magnetic block of the limiting slider, applying a force to the limiting slider to disengage from the slot. This compresses the return spring, and the limiting slider and limiting rod slide back to the interior of the connecting plate. At this time, the connecting seat and the fixed seat are disconnected. The connecting seat and the upper punch fall due to gravity, and the connecting plate slides down along the lower half of the fixed plate and the surface of the sliding rod.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a high-strength ceramic preparation mold. Background Technology

[0002] Ceramic materials are widely used in mechanical, electronic and other fields due to their excellent properties such as high hardness and wear resistance. Dry pressing is one of the processes for preparing high-performance ceramic parts. It involves filling ceramic powder into a mold cavity and applying high pressure to densify it to form a preform.

[0003] In actual dry pressing, when the downward speed of the punch is too fast, the gas in the gaps between powder particles may not be able to be discharged in time, forming a local high-pressure zone in the cavity. When the gas pressure accumulates to a critical point, it suddenly breaks through the not-yet-fully-dense powder layer, causing powder spraying. This results in surface defects in the green body structure, reduces the strength of the green body, and lowers the product qualification rate. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a high-strength ceramic preparation mold, which solves the problem of excessively rapid dry pressing of ceramic powder inside the mold, making it difficult to expel gas in a timely and sufficient manner.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a high-strength ceramic preparation mold, including a template and a lower punch, and further including a fixed base, a buffer, a connecting base, an upper punch, and a pressure sensor. The template is set on a worktable, the lower punch is located below the template and its bottom is connected to a pushing device, the fixed base is located above the template and its top is connected to the pushing device, the buffer is fixedly installed at the bottom of the fixed base, the connecting base is slidably sleeved on the bottom end of the fixed base, and the buffer penetrates the surface of the connecting base. The elastic end of the buffer is connected to the bottom of the connecting base, the magnetic end inside the fixed base corresponds to the moving end inside the connecting base, the upper punch is fixedly installed at the bottom of the connecting base, and the pressure sensor is set at the bottom inner side of the upper punch, and the bottom end of the fixed base penetrates the top of the upper punch and corresponds to the pressure sensor.

[0006] The mounting base includes a top plate, a fixing plate, a slot, and an electromagnet. The fixing plate is fixedly installed at the bottom of the top plate, and a horizontal slot is provided on the surface of the fixing plate. The electromagnet is located inside the slot.

[0007] The fixing plate is T-shaped, and the bottom end of the fixing plate extends vertically through the surface of the connecting seat and the top of the upper punch, corresponding to the pressure sensor.

[0008] The buffer component includes a slide rod, a baffle, and a buffer spring. The slide rod is fixedly installed at the bottom of the fixed base, the baffle is fixedly installed at the bottom end of the slide rod, the buffer spring is sleeved on the surface of the slide rod, the bottom end of the buffer spring is connected to the top of the baffle, and the top end of the buffer spring is connected to the bottom of the connecting base.

[0009] The number of buffer components is two sets, and the two sets of buffer components are symmetrically arranged about the bottom end of the fixed base.

[0010] The connecting seat includes a connecting plate, a sliding groove, and a connecting slot. The left and right ends of the connecting plate are provided with sliding grooves in the vertical direction, and the middle part of the connecting plate is provided with a connecting slot in the vertical direction. The upper punch is fixedly installed on the bottom of the connecting plate, and the connecting plate is connected and fixed to the upper punch by bolts.

[0011] The connecting seat also includes a limiting slider, a limiting rod, and a return spring. The limiting slider is slidably installed inside the connecting plate. A strong magnetic block is embedded in the side of the limiting slider near the connecting groove. The limiting rod is fixedly installed on the side of the limiting slider away from the connecting groove and is slidably installed inside the connecting plate. The return spring is sleeved on the surface of the limiting rod. One end of the return spring is connected to the side of the limiting slider away from the connecting groove, and the other end is connected to the inner wall of the connecting plate.

[0012] The number of the limiting slider, limiting rod and reset spring are two sets, and they are symmetrically arranged on the inner walls of the left and right sides of the connecting groove.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention uses a return spring to push a limiting slider, causing it to slide along the guide of a limiting rod and insert into the slot. At this time, the connecting seat and the fixed seat are connected. The pushing device controls the fixed seat to move up and down, driving the upper punch at the bottom of the connecting seat to dry-press the ceramic powder. An electromagnet is activated, causing it to repel the strong magnetic block of the limiting slider, applying a force to the limiting slider to disengage from the slot. This compresses the return spring, and the limiting slider and limiting rod slide back to the inside of the connecting plate. At this time, the connecting seat and the fixed seat are disconnected. The connecting seat and the upper punch fall due to gravity, and the connecting plate moves along the lower half of the fixed plate. As some surfaces and the slide bar slide down, the compression of the buffer spring intensifies, applying a stronger upward force to the connecting seat and the upper punch. When it reaches the lower limit position, the pressure applied by the upper punch to the ceramic powder is at its minimum. As the fixed seat moves down, the pressure of the upper punch on the ceramic powder gradually increases, thus pre-pressing and venting the ceramic powder when the fixed seat moves down. This avoids excessive pressure application, which could prevent the internal gas of the ceramic powder from being fully discharged, affecting the quality of the molded blank. The pressure sensor detects the contact between the slot and the upper punch, thus determining the timing when the fixed seat begins to accurately apply pressure to the upper punch for dry pressing. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural disassembly diagram of the present invention;

[0016] Figure 2 This is a rear view schematic diagram of the present invention;

[0017] Figure 3 This is the first partial structural concept of the present utility model;

[0018] Figure 4 This is a second partial sectional view of the present invention;

[0019] Figure 5 This is a schematic diagram of the third partial structure of this utility model;

[0020] Figure 6 This is a schematic cross-sectional view of the fourth part of this utility model.

[0021] Reference numerals in the attached drawings: 1. Template; 2. Lower punch; 3. Fixed base; 301. Top plate; 302. Fixed plate; 303. Slot; 304. Electromagnet; 4. Buffer; 401. Slide rod; 402. Baffle; 403. Buffer spring; 5. Connecting base; 501. Connecting plate; 502. Slide groove; 503. Connecting groove; 504. Limiting slider; 505. Limiting rod; 506. Return spring; 6. Upper punch; 7. Pressure sensor. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0023] Figures 1-6 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figure 1 -Appendix Figure 6 The present invention will be further described below.

[0024] A high-strength ceramic preparation mold includes a template 1 and a lower punch 2, as well as a fixed base 3, a buffer 4, a connecting base 5, an upper punch 6, and a pressure sensor 7. The template 1 is set on a worktable, the lower punch 2 is located below the template 1 and its bottom is connected to a pushing device, the fixed base 3 is located above the template 1 and its top is connected to the pushing device. The pushing device can be a hydraulic cylinder, a pneumatic cylinder, an electric motor transmission mechanism, or other devices as needed. The buffer 4 is fixedly installed at the bottom of the fixed base 3, the connecting base 5 is slidably sleeved on the bottom end of the fixed base 3, and the buffer 4 penetrates the surface of the connecting base 5. The elastic end of the buffer 4 is connected to the bottom of the connecting base 5. The magnetic end inside the fixed base 3 is correspondingly set to the moving end inside the connecting base 5. The upper punch 6 is fixedly installed at the bottom of the connecting base 5, and the pressure sensor 7 is set at the bottom inner side of the upper punch 6, and the bottom end of the fixed base 3 penetrates the top of the upper punch 6 and is correspondingly set to the pressure sensor 7.

[0025] Specifically, by controlling the downward movement of the fixed seat 3 and its connected components below it, the ceramic powder located in the template 1 is dry-pressed and formed. By controlling the upward movement of the lower punch 2, the ceramic blank located in the template 1 is ejected. The buffer 4 supports the vertical movement of the connecting seat 5 and the upper punch 6. By switching the connection between the fixed seat 3 and the connecting seat 5, the upper punch 6 is controlled to pre-press and shape the ceramic powder. The pressure sensor 7 detects whether the fixed seat 3 and the upper punch 6 are in a tight contact state.

[0026] The mounting base 3 includes a top plate 301, a mounting plate 302, a slot 303, and an electromagnet 304. The mounting plate 302 is fixedly installed on the bottom of the top plate 301. A horizontal slot 303 is provided on the surface of the mounting plate 302. The electromagnet 304 is disposed inside the slot 303.

[0027] Specifically, the top plate 301 is pushed down by the pushing device, which in turn pushes the connected mechanism below it down to press the ceramic powder. The contact between the fixed plate 302 and the pressure sensor 7 determines the timing of the contact between the fixed seat 3 and the upper punch 6, which facilitates the accurate control of the pressure applied to the ceramic powder by the upper punch 6. The slot 303 accommodates the insertion of the limiting slider 504, thereby connecting and fixing the fixed seat 3 and the connecting seat 5. The electromagnet 304 applies a repulsive force to the strong magnetic block of the limiting slider 504, causing the limiting slider 504 to exit the slot 303, thereby separating the fixed seat 3 and the connecting seat 5.

[0028] The fixing plate 302 is T-shaped, and the bottom end of the fixing plate 302 extends vertically through the surface of the connecting seat 5 and the top of the upper punch 6, corresponding to the pressure sensor 7.

[0029] Specifically, when the bottom end of the fixing plate 302 is inserted into the interior of the upper punch 6, the connecting seat 5 and the upper punch 6 fall under their own weight. The limiting slider 504 is pushed by the reset spring 506 to adhere to the lower half of the surface of the fixing plate 302, waiting to be inserted into the interior of the slot 303, until the fixing seat 3 continues to move down and completes the connection with the connecting seat 5.

[0030] The buffer component 4 includes a slide rod 401, a baffle 402, and a buffer spring 403. The slide rod 401 is fixedly installed at the bottom of the fixed plate 302, the baffle 402 is fixedly installed at the bottom end of the slide rod 401, the buffer spring 403 is sleeved on the surface of the slide rod 401, the bottom end of the buffer spring 403 is connected to the top of the baffle 402, and the top end of the buffer spring 403 is connected to the bottom of the connecting plate 501.

[0031] Specifically, the connecting seat 5 is guided to slide down steadily by the slide rod 401, the buffer spring 403 is supported by the baffle 402, and the buffer spring 403 applies an upward force to the connecting seat 5 to slow down the fall of the connecting seat 5 and the upper punch 6, so that when the upper punch 6 falls to the top of the ceramic powder, the pressure on it is at a minimum.

[0032] There are two sets of buffer components 4, and the two sets of buffer components 4 are symmetrically arranged about the bottom end of the T-shaped fixing plate 302;

[0033] Specifically, the connecting seat 5 is guided to slide down steadily by two sets of buffers 4, and a sufficient upward force is provided to the connecting seat 5.

[0034] The connecting seat 5 includes a connecting plate 501, a sliding groove 502 and a connecting groove 503. The connecting plate 501 has vertical sliding grooves 502 at both ends. The surface of the sliding rod 401 is in contact with the inner wall of the sliding groove 502. The connecting plate 501 has a vertical connecting groove 503 in the middle. The bottom surface of the fixing plate 302 is in contact with the inner wall of the connecting groove 503. The upper punch 6 is fixedly installed at the bottom of the connecting plate 501. The connecting plate 501 is connected and fixed to the upper punch 6 by bolts.

[0035] Specifically, the upper punch 6 at the bottom of the connecting plate 501 can be easily disassembled and replaced by bolts, the connecting plate 501 can be stably slid along the surface of the slide rod 401 by the slide groove 502, and the connecting plate 501 can be stably slid along the lower half of the surface of the fixing plate 302 by the connecting groove 503.

[0036] The connecting seat 5 also includes a limiting slider 504, a limiting rod 505, and a return spring 506. The limiting slider 504 is slidably installed inside the connecting plate 501. A strong magnetic block is embedded in the side of the limiting slider 504 near the connecting groove 503. The limiting rod 505 is fixedly installed on the side of the limiting slider 504 away from the connecting groove 503. The limiting rod 505 is slidably installed inside the connecting plate 501. The return spring 506 is sleeved on the surface of the limiting rod 505. One end of the return spring 506 is connected to the side of the limiting slider 504 away from the connecting groove 503, and the other end is connected to the inner wall of the connecting plate 501.

[0037] Specifically, the return spring 506 applies a pushing force to the limiting slider 504 to slide toward the connecting groove 503, the limiting rod 505 guides the limiting slider 504 to make its sliding process more stable, and the strong magnetic block of the limiting slider 504 and the electromagnet 304 repel each other, thereby driving the limiting slider 504 to slide away from the connecting groove 503, so that the return spring 506 is compressed.

[0038] There are two sets of limiting sliders 504, limiting rods 505 and return springs 506, which are symmetrically arranged on the inner walls of the left and right sides of the connecting groove 503. The limiting sliders 504 and the slots 303 are arranged in a corresponding manner.

[0039] Specifically, by using two sets of limiting sliders 504 located inside the slot 303 and the connecting plate 501, the connection between the connecting seat 5 and the fixed seat 3 is made more stable.

[0040] In summary: When using this invention, the lower punch 2 is located inside the template 1, and the fixed seat 3 and its lower components are located above the template 1. The operator adds ceramic powder into the template 1, and the ceramic powder accumulates on top of the lower punch 2. At this time, the pushing device does not control the fixed seat 3 to move downwards. The limiting slider 504 is located inside the slot 303 and the connecting plate 501, and the connecting seat 5 remains connected to the fixed seat 3. When the preparation of the ceramic blank begins, the electromagnet 304 is activated to apply a repulsive force to the strong magnetic block of the limiting slider 504, causing the limiting slider 504 to move downwards. The slider 504 and the limiting rod 505 slide away from the connecting groove 503, and the return spring 506 is continuously compressed until the limiting slider 504 disengages from the inside of the slot 303 and the electromagnet 304 stops, completing the disconnection of the connecting seat 5 from the fixed seat 3. Due to gravity, the connecting seat 5 and the upper punch 6, along with the sliding rod 401 inside the sliding groove 502 and the fixed plate 302 inside the connecting groove 503, guide the connecting plate 501 to slide down steadily. During the descent, the connecting plate 501 compresses the buffer spring 403, relying on the buffer spring 403... The descent of the connecting seat 5 and the upper punch 6 is slowed until the bottom surface of the upper punch 6 contacts the ceramic powder in the template 1. At this point, the pressure of the upper punch 6 on the powder is at its minimum. The pushing device at the fixed seat 3 is then activated to move them downwards, causing the slide rod 401 to slide downwards through the slide groove 502 and the fixed plate 302 to slide downwards through the connecting groove 503. The buffer spring 403 gradually unfolds, and the pressure of the upper punch 6 on the powder gradually increases. During this process, air inside the ceramic powder is continuously expelled, achieving pre-pressurization, until the bottom end of the fixed plate 302 contacts the pressure sensor. 7. At this point, the slot 303 and the limiting slider 504 are on the same horizontal plane. The limiting slider 504 is pushed into the slot 303 by the reset spring 506, and the connection and fixation of the connecting seat 5 and the fixed seat 3 are completed again. The pressure of the upper punch 6 on the ceramic powder is accurately controlled by the pushing device at the fixed seat 3 to produce the required ceramic blank. Then, the fixed seat 3 and its connected components below it are moved up and controlled to return to their original position. Then, the lower punch 2 is moved up by the pushing device at the lower punch 2 to push out the ceramic blank in the template 1 to produce the ceramic product.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A high-strength ceramic production mold comprising a mold plate (1) and a lower punch (2), characterized in that, It also includes a fixed seat (3), a buffer (4), a connecting seat (5), an upper punch (6), and a pressure sensor (7). The template (1) is set on the workbench, the lower punch (2) is located below the template (1), and its bottom is connected to the pushing device. The fixed seat (3) is located above the template (1), and its top is connected to the pushing device. The buffer (4) is fixedly installed on the bottom of the fixed seat (3). The connecting seat (5) is slidably sleeved on the bottom end of the fixed seat (3), and the buffer (4) penetrates through the surface of the connecting seat (5). The elastic end of the buffer (4) is connected to the bottom of the connecting seat (5). The magnetic end inside the fixed seat (3) is correspondingly set with the moving end inside the connecting seat (5). The upper punch (6) is fixedly installed on the bottom of the connecting seat (5). The pressure sensor (7) is set on the inner bottom of the upper punch (6), and the bottom end of the fixed seat (3) penetrates through the top of the upper punch (6) and is correspondingly set with the pressure sensor (7).

2. The high strength ceramic production mold of claim 1, wherein, The fixing base (3) includes a top plate (301), a fixing plate (302), a slot (303) and an electromagnet (304). The fixing plate (302) is fixedly installed at the bottom of the top plate (301). A horizontal slot (303) is opened on the surface of the fixing plate (302), and the electromagnet (304) is set inside the slot (303).

3. A high strength ceramic production mold according to claim 2, wherein The fixing plate (302) is T-shaped, and the bottom end of the fixing plate (302) extends vertically through the surface of the connecting seat (5) and the top of the upper punch (6), corresponding to the pressure sensor (7).

4. The high strength ceramic production mold of claim 1, wherein, The buffer component (4) includes a slide rod (401), a baffle (402) and a buffer spring (403). The slide rod (401) is fixedly installed at the bottom of the fixed seat (3), the baffle (402) is fixedly installed at the bottom end of the slide rod (401), the buffer spring (403) is sleeved on the surface of the slide rod (401), the bottom end of the buffer spring (403) is connected to the top of the baffle (402), and the top end of the buffer spring (403) is connected to the bottom of the connecting seat (5).

5. A high-strength ceramic preparation mold according to claim 1, characterized in that, The number of buffers (4) is two sets, and the two sets of buffers (4) are symmetrically arranged about the bottom of the fixed seat (3).

6. The high strength ceramic production mold of claim 1, wherein, The connecting seat (5) includes a connecting plate (501), a sliding groove (502) and a connecting groove (503). The connecting plate (501) has a sliding groove (502) in the vertical direction at both ends and a connecting groove (503) in the vertical direction in the middle. The upper punch (6) is fixedly installed at the bottom of the connecting plate (501) and the connecting plate (501) is connected and fixed to the upper punch (6) by bolts.

7. A high strength ceramic production mold according to claim 6, wherein The connecting seat (5) also includes a limiting slider (504), a limiting rod (505), and a return spring (506). The limiting slider (504) is slidably installed inside the connecting plate (501). A strong magnetic block is embedded on the side of the limiting slider (504) near the connecting groove (503). The limiting rod (505) is fixedly installed on the side of the limiting slider (504) away from the connecting groove (503). The limiting rod (505) is slidably installed inside the connecting plate (501). The return spring (506) is sleeved on the surface of the limiting rod (505). One end of the return spring (506) is connected to the side of the limiting slider (504) away from the connecting groove (503), and the other end is connected to the inner wall of the connecting plate (501).

8. A high strength ceramic production mold according to claim 7, wherein The number of the limiting slider (504), the limiting rod (505) and the return spring (506) are two sets, and they are symmetrically arranged on the inner walls of the left and right sides of the connecting groove (503).

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