Mould for preparing porous aluminum oxide ceramic

Abstract

The utility model relates to the technical field of ceramic preparation, in particular to a mold for porous alumina ceramic preparation, which comprises a lower mold base and an upper mold base, a mold cavity is arranged in the middle of the top surface of the lower mold base, a detachable vertical rod is arranged on a bottom plate of the mold cavity, and a movable bottom plate matched with the mold cavity and slidably sleeved on a rod body of the vertical rod is arranged in the mold cavity. An extrusion die plate matched with the die cavity is arranged in the middle of the bottom face of the upper die base, guide rods are arranged at the two ends of the upper die base, the lower ends of the guide rods penetrate through the lower die base in a sliding mode and are provided with inward bending parts, and ejector rods capable of penetrating through a bottom plate of the die cavity are arranged on the top faces of the inner ends of the bending parts; the upper end of the guide rod is connected with the upper die holder, and the lower end of the guide rod penetrates through the lower die holder in a sliding manner, so that when the die is installed, the function of positioning the lower die holder and the upper die holder can be achieved, position deviation of the lower die holder and the upper die holder is prevented, and the function of convenient installation is achieved.

Description

Technical Field

[0001] This utility model relates to the field of ceramic preparation technology, and in particular to a mold for preparing porous alumina ceramics. Background Technology

[0002] Porous ceramics are a new type of ceramic material characterized by uniformly distributed pores, a very large specific surface area, and unique physical surface properties. Furthermore, ceramic materials themselves possess excellent properties such as high temperature resistance, friction resistance, corrosion resistance, high strength, high hardness, and high elastic modulus, which has led to the widespread application of porous ceramics.

[0003] Chinese Patent (Announcement No.: CN209408820U) discloses a porous alumina ceramic mold. The mold includes a first mounting plate with a lower mold cavity that is bolted to the top surface of the lower mold and a second mounting plate with an upper mold cavity that is bolted to the bottom surface of the upper mold. The lower mold cavity is provided with protruding pillars for forming holes in the ceramic. However, this device has the following disadvantages: 1. When loading material into the lower mold cavity, the material is easily stuck on the top surface of the protruding pillars, affecting the forming quality; 2. Although the upper part of the formed ceramic blank can extend out of the lower mold cavity, there is still a problem of difficulty in demolding.

[0004] To address this, we designed a mold for preparing porous alumina ceramics to solve at least one of the aforementioned defects. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses a mold for preparing porous alumina ceramics.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] A mold for preparing porous alumina ceramics includes a lower mold base and an upper mold base. The lower mold base has a mold cavity in the middle of its top surface, and the bottom plate of the mold cavity has a detachable vertical rod. The mold cavity also has a movable bottom plate that matches and is slidably sleeved on the vertical rod. The upper mold base has an extrusion template that matches the mold cavity in the middle of its bottom surface. The upper mold base has guide rods at both ends. The lower end of the guide rod slides through the lower mold base and has an inwardly bent portion. The top surface of the inner end of the bent portion has a push rod that can penetrate the bottom plate of the mold cavity.

[0008] Preferably, the upper mold base is provided with U-shaped mounting plates at both ends, the upper end of the guide rod slides through the bottom of the U-shaped mounting plate and is provided with a limiting ring, and the guide rod body is fitted with a first spring at the position between the limiting ring and the inner top surface of the U-shaped mounting plate.

[0009] Preferably, the upper end of the push rod movably penetrates the bottom plate of the mold cavity and is correspondingly connected to the bottom surface of the movable bottom plate.

[0010] Preferably, a return spring is fitted onto the top rod body at a position matching the position between the bent portion and the bottom surface of the lower mold base.

[0011] Preferably, the bottom of both sides of the lower mold base is provided with a fixing ear plate with mounting holes, and the guide rod slides through the fixing ear plate.

[0012] Preferably, the upper end of the vertical rod extends out of the mold cavity; the extrusion template is provided with a clearance hole at the position corresponding to the vertical rod for the upper end of the vertical rod to be inserted.

[0013] Preferably, the upper end of the vertical rod is a dome.

[0014] Preferably, the lower end of the vertical rod is provided with a reduced diameter section with a threaded portion, which is threadedly fitted to the bottom plate of the mold cavity.

[0015] By adopting the technical solution described above, this utility model has the following beneficial effects:

[0016] 1. Since the upper end of the guide rod is connected to the upper mold base and the lower end slides through the lower mold base, it can position the lower mold base and the upper mold base when installing the mold, preventing positional deviation between the lower mold base and the upper mold base, and realizing the function of convenient installation;

[0017] 2. Due to the design of the guide rod, ejector rod, and movable base plate, the movable base plate can rise during the upward movement of the upper mold base, thereby removing the mold blank from the mold cavity and achieving the function of automatic demolding.

[0018] 3. Due to the height of the vertical rod and the setting of the clearance hole in the extrusion template, the vertical rod can be inserted into the clearance hole when the material is extruded into the mold blank, ensuring that the vertical rod penetrates the mold blank and preventing material from appearing between the top surface of the vertical rod and the bottom surface of the extrusion template, which would affect the quality of the mold blank. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This is a cross-sectional view of the present invention in another state.

[0022] In the diagram: 1. Lower mold base; 11. Mold cavity; 12. Vertical rod; 13. Movable base plate; 14. Fixed ear plate; 2. Upper mold base; 21. Extrusion template; 22. U-shaped mounting plate; 3. Guide rod; 31. Bending part; 32. Limiting ring; 33. First spring; 4. Push rod; 5. Return spring. Detailed Implementation

[0023] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0024] Example 1, in conjunction with Appendix Figure 1-3 A mold for preparing porous alumina ceramics includes a lower mold base 1 and an upper mold base 2. A mold cavity 11 is provided in the center of the top surface of the lower mold base 1, and a detachable vertical rod 12 is provided on the bottom plate of the mold cavity 11. As needed, the lower end of the vertical rod 12 is screwed to the bottom plate of the mold cavity 11; furthermore, the lower end of the vertical rod 12 has a reduced diameter section with a threaded portion, which is threaded into the bottom plate of the mold cavity 11; that is, when the vertical rod 12 is damaged, the damaged vertical rod 12 can be disassembled and replaced accordingly.

[0025] The mold cavity 11 is equipped with a movable base plate 13 that matches and slides on the body of the vertical rod 12. The upper mold base 2 has an extrusion template 21 that matches the mold cavity 11 in the middle of its bottom surface. Both ends of the upper mold base 2 are equipped with guide rods 3. The lower end of the guide rod 3 slides through the lower mold base 1 and has an inwardly bent portion 31. If necessary, both sides of the bottom of the lower mold base 1 are equipped with fixed ear plates 14 with mounting holes. The guide rod 3 slides through the fixed ear plates 14. The top surface of the inner end of the bent portion 31 is equipped with a push rod 4 that can penetrate the bottom plate of the mold cavity 11.

[0026] It should be noted that: when the material is compacted and formed, there is a gap between the top surface of the push rod 4 and the bottom surface of the movable base plate 13, or the guide rod 3 has the ability to move downward relative to the upper mold base 2. That is to say, when the material is not compacted and formed, the distance between the bottom surface of the extrusion template 21 and the top surface of the movable base plate 13 is greater than the distance between the bottom surface of the extrusion template 21 and the top surface of the movable base plate 13 when the material is compacted and formed.

[0027] During installation, first install the lower mold base 1 on the working platform of the press, and install the upper mold base 2 below the lifting part of the press. During use, first place a certain amount of material into the mold cavity 11, and then start the press. The lifting part of the press drives the upper mold base 2 to descend, and the upper mold base 2 drives the extrusion platen 21 to descend, extruding the material in the mold cavity 11, so that the material in the mold cavity 11 is formed into a mold blank. When demolding, the lifting part of the press drives the upper mold base 2 to rise until the ejector rod 4 pushes the movable base plate 13 upward, so that the movable base plate 13 moves to the top of the mold cavity 11. At this time, the mold blank can be removed.

[0028] Since the upper end of the guide rod 3 is connected to the upper mold base 2 and the lower end slides through the lower mold base 1, it can position the lower mold base 1 and the upper mold base 2 during mold installation, preventing positional deviation between the lower mold base 1 and the upper mold base 2, thus facilitating installation. At the same time, due to the arrangement of the guide rod 3, the ejector rod 4 and the movable base plate 13, the movable base plate 13 can rise during the upward movement of the upper mold base 2, thereby removing the mold blank from the mold cavity 11 and achieving automatic demolding.

[0029] Furthermore, to prevent excessive lifting of the press's lifting section from causing excessive force between the bending section 31 and the bottom surface of the lower die holder 1, resulting in adverse consequences, U-shaped mounting plates 22 are provided at both ends of the upper die holder 2. The upper end of the guide rod 3 slides through the bottom of the U-shaped mounting plate 22 and is provided with a limiting ring 32. A first spring 33 is fitted onto the guide rod 3 at a position matching the position between the limiting ring 32 and the inner top surface of the U-shaped mounting plate 22.

[0030] As needed, the U-shaped mounting plate 22 is located at the center of the end of the upper mold base 2.

[0031] As needed, the U-shaped mounting plate 22 has an observation notch corresponding to the position of the staff, so that the staff can easily observe the state of the first spring 33.

[0032] This design allows the first spring 33 to be further compressed and deformed when the bending part 31 contacts the bottom surface of the lower die holder 1 during the process of the upper die holder 2 rising with the lifting part of the press. At this time, the operator can observe the state of the first spring 33 and know that if the lifting part of the press continues to rise, adverse consequences may occur.

[0033] If necessary, a compression buzzer can also be provided on the top surface of the bending part 31 or at the position of the lower die base 1 corresponding to the bending part 31. That is, before the bending part 31 contacts the bottom surface of the lower die base 1, the compression buzzer will sound under pressure to remind the staff to stop the press lifting part from continuing to rise.

[0034] Example 2, in conjunction with Appendix Figure 1-3 A mold for preparing porous alumina ceramics, based on Embodiment 1, has an upper end of the ejector rod 4 that movably passes through the bottom plate of the mold cavity 11 and is correspondingly connected to the bottom surface of the movable bottom plate 13; a return spring 5 is fitted at the position of the ejector rod 4 between the bent part 31 and the bottom surface of the lower mold base 1.

[0035] As needed, each bend 31 is provided with two top rods 4.

[0036] This configuration allows the press lifting section to descend a certain distance before loading material into the mold cavity 11. At this time, the return spring 5 presses down on the bending section 31, which in turn drives the push rod 4 and the movable base plate 13 to descend. This prevents the movable base plate 13 from failing to descend to the bottom of the mold cavity 11 due to various reasons, such as between the movable base plate 13 and the vertical rod 12, between the push rod 4 and the lower mold base 1, or between the guide rod 3 and the lower mold base 1, thus affecting the ability of the mold cavity 11 to load the required material.

[0037] Example 3, in conjunction with Appendix Figure 1-3 A mold for preparing porous alumina ceramics, based on Example 1 or 2; the upper end of the vertical rod 12 extends out of the mold cavity 11; the extrusion template 21 is provided with a clearance hole 211 for the upper end of the vertical rod 12 to be inserted at the position corresponding to the vertical rod 12.

[0038] To prevent material from getting stuck on the top surface of the top rod 4 during loading, the upper end of the vertical rod 12 is dome-shaped;

[0039] This design prevents the vertical rod 12 from being inserted into the clearance hole 211 when the material is extruded into the mold blank. It ensures that the vertical rod 12 penetrates the mold blank and prevents material from appearing between the top surface of the vertical rod 12 and the bottom surface of the extrusion template 21, which would affect the quality of the mold blank.

[0040] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents within this utility model.

Claims

1. A mold for preparing porous alumina ceramics, characterized in that: The upper mold base includes a lower mold base (1) and an upper mold base (2). The lower mold base (1) has a mold cavity (11) in the middle of its top surface. The bottom plate of the mold cavity (11) has a detachable vertical rod (12). The mold cavity (11) has a movable bottom plate (13) that matches and is slidably sleeved on the body of the vertical rod (12). The upper mold base (2) has an extrusion template (21) that matches the mold cavity (11) in the middle of its bottom surface. The upper mold base (2) has guide rods (3) at both ends. The lower end of the guide rod (3) slides through the lower mold base (1) and has an inwardly bent part (31). The top surface of the inner end of the bent part (31) has a push rod (4) that can penetrate the bottom plate of the mold cavity (11).

2. The mold for preparing porous alumina ceramics according to claim 1, characterized in that: The upper mold base (2) is provided with U-shaped mounting plates (22) at both ends. The upper end of the guide rod (3) slides through the bottom of the U-shaped mounting plate (22) and is provided with a limiting ring (32). The guide rod (3) is positioned between the limiting ring (32) and the inner top surface of the U-shaped mounting plate (22) and is fitted with a first spring (33).

3. The mold for preparing porous alumina ceramics according to claim 2, characterized in that: The upper end of the push rod (4) can move through the bottom plate of the mold cavity (11) and is correspondingly connected to the bottom surface of the movable bottom plate (13).

4. The mold for preparing porous alumina ceramics according to claim 3, characterized in that: The top rod (4) is positioned between the bent part (31) and the bottom surface of the lower mold base (1) and is fitted with a reset spring (5).

5. The mold for preparing porous alumina ceramics according to claim 1, characterized in that: The lower mold base (1) has fixed ear plates (14) with mounting holes on both sides of the bottom, and the guide rod (3) slides through the fixed ear plates (14).

6. The mold for preparing porous alumina ceramics according to claim 1, characterized in that: The upper end of the vertical rod (12) extends out of the mold cavity (11); the extrusion template (21) is provided with a clearance hole (211) for the upper end of the vertical rod (12) to be inserted at the position corresponding to the vertical rod (12).

7. A mold for preparing porous alumina ceramics according to claim 1 or 6, characterized in that: The upper end of the vertical rod (12) is a dome.

8. The mold for preparing porous alumina ceramics according to claim 1, characterized in that: The lower end of the vertical rod (12) is provided with a reduced diameter section with a threaded portion, which is threadedly fitted to the bottom plate of the mold cavity (11).

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