Die assembly for ceramic tube machining

Abstract

The utility model provides a mould assembly for processing a ceramic tube, which comprises a rubber sleeve, a mould core, a mould core, a mould core, a mould core, a mould core, a mould core, a mould core, a mould core and a mould core, and is characterized in that the mould core is provided with a top end and a bottom end; the core body is provided with a first connecting end and a first matching end which are oppositely arranged in the extending direction of the rubber sleeve, the first connecting end is in contact fixation with the bottom end, the first matching end extends into the rubber sleeve and is arranged close to the top end, the end face of the first matching end is a curved surface, and an annular first interval is formed between the side wall of the core body and the side wall of the rubber sleeve; the top plug is provided with a second connecting end and a second matching end which are oppositely arranged, the second connecting end is in contact and fixed with the top end, the second matching end extends into the rubber sleeve, the end face of the second matching end is a curved surface, a second interval is formed between the first matching end and the second matching end, the first interval is communicated with the second interval, and the rubber sleeve, the core body and the top plug are matched to form a U-shaped cavity. By the adoption of the structure, the problem that in the prior art, a mold is complex in structure and not easy to disassemble and assemble can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ceramic blank static pressure forming technical field, specifically, relate to a mould assembly for ceramic pipe processing. BACKGROUND

[0002] As an important ceramic product, ceramic pipes are widely used in various high-temperature, high-pressure and corrosive environments. In the manufacturing process of ceramic pipes, forming is a key step, and the quality of the mold directly affects the precision and quality of the workpiece forming.

[0003] However, in the prior art, the ceramic pipe forming mold has a complex structure and a cumbersome disassembly process, which greatly reduces the production efficiency. Therefore, there is a great improvement space for the existing ceramic pipe forming mold. UTILITY MODEL CONTENT

[0004] The utility model provides a mould assembly for ceramic pipe processing to solve the problem of complex structure of ceramic pipe forming mold in prior art.

[0005] The utility model provides a mould assembly for ceramic pipe processing, mould assembly includes: rubber bush, rubber bush has opposite top end and bottom end, rubber bush is hollow structure from top end to bottom end penetration, core body, core body has opposite first connecting end and first cooperation end along the extension direction of rubber bush, first connecting end and bottom end contact fixed, first cooperation end extends to rubber bush, and it is close to top end setting, the end face of first cooperation end is curved surface, the side wall of core body and the side wall of rubber bush have annular first interval, top plug, top plug has opposite second connecting end and second cooperation end, second connecting end and top end contact fixed, second cooperation end extends to rubber bush, the end face of second cooperation end is curved surface, first cooperation end and second cooperation end have second interval, first interval and second interval intercommunication, rubber bush, core body and top plug cooperate and form U-shaped cavity.

[0006] Further, the rubber bush has a first tube segment and a second tube segment connected to each other, the inner diameter of the first tube segment is greater than that of the second tube segment, the first tube segment has a bottom end, the second tube segment has a top end, the first tube segment and the second tube segment are connected by a circular arc, the second cooperation end extends to the connection between the first tube segment and the second tube segment, and the inner wall surface of the connection between the first tube segment and the second tube segment cooperates with the second cooperation end to form a continuous curved surface structure.

[0007] Further, the distance between the core body and the inner wall of the rubber bush and the distance between the core body and the top plug are the same.

[0008] Further, the mould assembly further comprises a vibration assembly arranged outside the rubber bush, and the vibration assembly is used for vibrating the rubber bush.

[0009] Further, the vibration assembly comprises a shell, the shell is sleeved outside the rubber sleeve, and the inner wall of the shell abuts against the outer wall of the rubber sleeve; and a vibrator is fixed on the outer side wall of the shell, and the vibrator conducts vibration to the rubber sleeve through the shell.

[0010] Further, the side wall of the shell is provided with a fixing hole and a plurality of through holes, the vibrator is connected to the fixing hole through a fastener, and the plurality of through holes are uniformly distributed on the shell.

[0011] Further, the core body comprises a first section, a second section and a third section arranged in steps, the diameter of the first section is smaller than that of the third section, the first section and the second section are located in the rubber sleeve, the bottom end of the rubber sleeve abuts against the end face of the third section close to the second section, the second section is in interference fit with the rubber sleeve, the first section forms a first interval with the inner wall of the rubber sleeve, and the first section has a first connecting end.

[0012] Further, the axis of the rubber sleeve, the axis of the core body and the axis of the top plug coincide with each other.

[0013] Further, the second connecting end of the top plug has an annular protrusion, the outer diameter of the annular protrusion is greater than the inner diameter of the top end, and the annular protrusion abuts against the end face of the top end for limiting.

[0014] Further, the length of the second section is in the range of 15-30 mm.

[0015] The technical scheme of the utility model provides a mold assembly for ceramic pipe machining, wherein the rubber sleeve has a hollow structure, has a top end and a bottom end arranged oppositely, the first connecting end of the core body is inserted into the hollow structure of the rubber sleeve from the bottom end of the rubber sleeve, the second connecting end of the top plug extends into the rubber sleeve from the top end of the rubber sleeve, and the second connecting end of the top plug is in contact connection with the top end, since the second connecting end of the top plug and the first connecting end of the core body are both curved surfaces, the core body and the top plug are in mutual cooperation inside the rubber sleeve, and a U-shaped cavity for placing powder is formed. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification of this application form a part hereof, serve to provide further understanding of the utility model, and together with the specification explain the utility model. The schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute an improper limitation on the utility model. In the drawings:

[0017] Fig. 1 A sectional view of the mold assembly for ceramic pipe machining is shown;

[0018] Fig. 2 An exploded view of the mold assembly for ceramic pipe machining is shown;

[0019] Fig. 3 A schematic diagram of the mold assembly for ceramic tube processing provided by this utility model is shown.

[0020] The above figures include the following reference numerals:

[0021] 10. Rubber sleeve;

[0022] 101. Top;

[0023] 102. Bottom end;

[0024] 11. First pipe section;

[0025] 12. Second pipe section;

[0026] 20. Core;

[0027] 201. First connection end;

[0028] 202. First mating end;

[0029] 21. First paragraph;

[0030] 22. The second paragraph;

[0031] 23. The third paragraph;

[0032] 30. Top plug;

[0033] 301. Second connection end;

[0034] 3011, Annular protrusion;

[0035] 302. Second mating end;

[0036] 40. U-shaped cavity;

[0037] 50. Vibration components;

[0038] 51. Outer shell;

[0039] 511. Fixing hole;

[0040] 512. Through hole;

[0041] 52. Vibrator. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0043] like Figs. 1 to 3 As shown, this utility model provides a mold assembly for processing ceramic tubes. The mold assembly includes a rubber sleeve 10, a core 20, and a top plug 30. The rubber sleeve 10 has a top end 101 and a bottom end 102 disposed opposite to each other, and the rubber sleeve 10 is a hollow structure extending from the top end 101 to the bottom end 102. The core 20 has a first connecting end 201 and a first mating end 202 disposed opposite to each other along the extending direction of the rubber sleeve 10. The first connecting end 201 is in contact with and fixed to the bottom end 102. The first mating end 202 extends into the rubber sleeve 10 and is disposed close to the top end 101. The end face of the first mating end 202 is curved. There is a first annular gap between the side wall of the core 20 and the side wall of the rubber sleeve 10. The top plug 30 has a second connecting end 301 and a second mating end 302 disposed opposite to each other. The second connecting end 301 is in contact with and fixed to the top end 101. The second mating end 302 extends into the rubber sleeve 10. The end face of the second mating end 302 is curved. There is a second gap between the first mating end 202 and the second mating end 302. The first gap and the second gap are interconnected. The rubber sleeve 10, the core 20 and the top plug 30 cooperate to form a U-shaped cavity 40.

[0044] This invention provides a mold assembly for ceramic tube processing. The sleeve 10 is a hollow structure with a top end 101 and a bottom end 102 positioned opposite each other. The first mating end 202 of the core 20 is inserted into the hollow structure of the sleeve 10 from the bottom end 102, making the first connecting end 201 contact the bottom end 102. The second mating end 302 of the top plug 30 extends from the top end 101 into the sleeve 10, making the second connecting end 301 contact the top end 101. Since both the second mating end 302 of the top plug 30 and the first mating end 202 of the core 20 are curved surfaces, the core 20 and the top plug 30 cooperate with each other inside the sleeve 10 to form a U-shaped cavity 40 for placing powder. Using this structure, the detachable connection of the sleeve 10, core 20, and top plug 30 makes the mold assembly simple in structure and easy to assemble and disassemble.

[0045] Furthermore, the sleeve 10 has a first pipe segment 11 and a second pipe segment 12 connected to each other. The inner diameter of the first pipe segment 11 is larger than the inner diameter of the second pipe segment 12. The first pipe segment 11 has a bottom end 102, and the second pipe segment 12 has a top end 101. The first pipe segment 11 and the second pipe segment 12 are connected by an arc transition. The second mating end 302 extends to the connection between the first pipe segment 11 and the second pipe segment 12. The inner wall surfaces of the first pipe segment 11 and the second pipe segment 12 at the connection point cooperate with the second mating end 302 to form a continuous curved surface structure.

[0046] In this embodiment, the sleeve 10 is composed of a first tube segment 11 and a second tube segment 12, which are connected by an arc transition. This ensures the continuity and uniformity of the internal structure of the sleeve 10, effectively reducing stress concentration during the forming process of the ceramic U-shaped tube and improving the wall thickness uniformity of the ceramic U-shaped tube. Specifically, the inner diameter of the first tube segment 11 is larger than that of the second tube segment 12, and the bottom end 102 of the first tube segment 11 is fixed in contact with the first connecting end 201 of the core 20. The top end 101 of the second tube segment 12 is fixed in contact with the second connecting end 301 of the top plug 30, allowing the core 20 and the top plug 30 to be stably fixed within the hollow structure of the sleeve 10.

[0047] Specifically, the ceramic U-shaped tube generated by the mold assembly is a U-shaped membrane, which acts as a diaphragm to isolate the positive and negative electrodes from their respective electrolytes, while allowing ions to pass through or selectively pass through. The U-shaped membrane processed using the mold assembly in this embodiment has a uniform wall thickness and a gradually changing curvature curve on both the inner and outer sides of the bottom, replacing the right-angle structure. This facilitates the uniform ion transport process across the membrane and effectively avoids damage or short circuits to the U-shaped membrane caused by tip discharge.

[0048] Specifically, the inner diameter of the first tube segment 11 gradually decreases towards the bottom end 102, and the inner diameter of the bottom end 102 is slightly smaller than the first connecting end 201 of the core 20. With the above structure, it can be ensured that the bottom end 102 of the first tube segment 11 can be tightly fitted with the first connecting end 201 of the core 20 without the need for additional fasteners. While ensuring a stable connection, it also ensures the airtightness of the inside of the sleeve 10 and avoids the risk of powder leakage.

[0049] Specifically, the top end 101 of the second tube section 12 is provided with an opening for adding powder. The opening has a certain thickness to ensure that the second connecting end 301 of the top plug 30 can be placed stably at the opening. The second mating end 302 of the top plug 30 can tightly seal the opening. The elasticity of the rubber sleeve 10 is used to ensure the sealing of the U-shaped cavity 40 and prevent the top plug 30 from moving relative to the other end during the pressing process, which would affect the dimensional accuracy of the ceramic U-shaped tube.

[0050] Specifically, the material of the rubber sleeve 10 is polyurethane with a Shore hardness of 60 to ensure that it has good elasticity and plasticity, can fit tightly with the core 20, and has the characteristics of oil resistance, water resistance and oxidation aging resistance to ensure the service life of the mold.

[0051] Furthermore, the distance between the core 20 and the inner wall of the sleeve 10, as well as the distance between the core 20 and the top plug 30, are the same. In this embodiment, by precisely controlling the distance between the sleeve 10 and the core 20, and between the top plug 30 and the core 20, the entire U-shaped cavity 40 has the same wall thickness, thereby ensuring that the final ceramic U-shaped tube has a uniform wall thickness.

[0052] Specifically, the distances between the rubber sleeve 10 and the core 20, and between the top plug 30 and the core 20, need to be precisely set according to the required wall thickness of the ceramic U-tube. Furthermore, during maintenance, the distances between the core 20 and the rubber sleeve 10 and the top plug 30 must be checked regularly to ensure consistency, and fine-tuning or replacement of components should be performed as necessary.

[0053] Furthermore, the mold assembly also includes a vibration component 50, which is disposed on the outside of the sleeve 10 and is used to vibrate the sleeve 10. In this embodiment, during the loading stage, after the powder is added to the U-shaped cavity 40 through the top opening of the sleeve 10, the vibration component 50 is immediately activated to intermittently vibrate the sleeve 10. This process compacts the powder, eliminates any air gaps that may exist between the powder particles, and facilitates the uniformity of subsequent sample molding, thereby ensuring that the produced U-shaped tube has higher density and consistency.

[0054] Specifically, the duration and frequency of vibration need to be adjusted according to the characteristics of the powder, such as particle size and flowability, as well as the size of the U-shaped cavity 40. The purpose is to ensure that the powder is evenly distributed in the U-shaped cavity 40 under vibration, while avoiding excessive vibration that could cause the powder to be compacted and affect the subsequent pressing process.

[0055] Furthermore, the vibration assembly 50 includes a housing 51 and a vibrator 52. The housing 51 is fitted over the outer side of the rubber sleeve 10, and the inner wall of the housing 51 abuts against the outer wall of the rubber sleeve 10. The vibrator 52 is fixed to the outer wall of the housing 51, and the vibrator 52 transmits vibration to the rubber sleeve 10 through the housing 51. In this embodiment, the housing 51 is a cylindrical structure that matches the outer wall of the rubber sleeve 10, and its inner diameter is slightly larger than the outer diameter of the rubber sleeve 10, ensuring that the rubber sleeve 10 can be easily inserted into the housing 51. At the same time, the abutment between the inner wall of the housing 51 and the outer wall of the rubber sleeve 10 achieves fixation and auxiliary alignment of the rubber sleeve 10. The vibrator 52 is detachably fixed to the outer wall of the housing 51, and transmits vibration to the rubber sleeve 10 through the housing 51. This facilitates the installation of the vibrator 52 while avoiding excessive vibration of the rubber sleeve 10 caused by the vibrator 52 being directly installed on the rubber sleeve 10.

[0056] Specifically, the outer casing 51 is made of metal to ensure its rigidity and stability. The upper and lower ends of the outer casing 51 are provided with openings to facilitate the insertion and removal of the rubber sleeve 10 and the installation of the vibrator 52.

[0057] Specifically, the vibrator 52 can be fixed to the outer wall of the housing 51 with screws, and the specific position can be selected in the lower middle part of the mold assembly to ensure that the vibration effect can be effectively transmitted to the powder in the U-shaped cavity 40. At the same time, the start and stop of the vibrator 52 can be adjusted according to the actual needs of the loading process. For example, the vibrator 52 can be turned on intermittently during the loading process to avoid excessive vibration causing uneven powder settling.

[0058] Furthermore, the side wall of the outer casing 51 is provided with a fixing hole 511 and multiple through holes 512. The vibrator 52 is connected to the fixing hole 511 by fasteners, and the multiple through holes 512 are evenly distributed on the outer casing 51. In this embodiment, the fixing hole 511 is used to install the vibrator 52, and the multiple through holes 512 are used to balance the pressure inside and outside the mold assembly, allowing the vibration effect to be evenly transmitted to the inside of the mold assembly, ensuring the stability of the mold assembly during the pressing process and the uniform distribution of the vibration effect of the vibrator 52.

[0059] Specifically, the size and number of through holes 512 need to be designed according to the dimensions of the housing 51 and the power of the vibrator 52. Too small a through hole 512 may affect the transmission of vibration, while too many through holes 512 may reduce the structural strength of the housing 51. The through holes 512 should be designed to ensure that the internal pressure of the mold assembly is released evenly during pressing in a cold isostatic press, avoiding mold deformation caused by excessive local pressure, and ensuring that the vibration effect can be evenly transmitted to all parts inside the mold assembly.

[0060] Furthermore, the core 20 includes a stepped first section 21, a second section 22, and a third section 23. The diameter of the first section 21 is smaller than the diameter of the third section 23. The first section 21 and the second section 22 are both located inside the rubber sleeve 10. The bottom end 102 of the rubber sleeve 10 abuts against the end face of the third section 23 near the second section 22. The second section 22 is press-fitted with the rubber sleeve 10. The first section 21 forms a first gap with the inner wall of the rubber sleeve 10. The first section 21 has a first mating end 202.

[0061] In this embodiment, the first segment 21 of the core 20 forms a first gap with the inner wall of the sleeve 10, which determines the wall thickness of the ceramic U-shaped tube. The first segment 21 has a first mating end 202, which mates with the inner wall of the sleeve 10 and the second mating end 302 of the top plug 30 to form the arc-shaped area of ​​the U-shaped cavity 40. The second segment 22 and the sleeve 10 are fitted with an interference fit, that is, the outer diameter of the second segment 22 is slightly larger than the inner diameter of the sleeve 10. The elasticity of the sleeve 10 is used to form a tight contact to ensure the structural stability of the mold assembly during the pressing process and to prevent the core 20 from moving within the sleeve 10. The third segment 23 of the core 20 has the largest diameter. The end face of the third segment 23 near the second segment 22 contacts and is fixed to the bottom end 102 of the sleeve 10, ensuring that the core 20 and the sleeve 10 are aligned and positioned, while providing additional support for the mold assembly to prevent deformation during vibration or pressing.

[0062] Furthermore, the axes of the sleeve 10, the core 20, and the top plug 30 coincide. In this embodiment, the coincidence of the axes of the sleeve 10, the core 20, and the top plug 30 helps to maintain the shape stability of the U-shaped cavity 40, avoiding uneven wall thickness or dimensional deviation of the ceramic U-shaped tube due to axis misalignment during the pressing process. At the same time, the alignment of the axes of each component also helps the ceramic tube to be smoothly removed from the mold, avoiding deformation or damage to the ceramic U-shaped tube caused by axis misalignment.

[0063] Furthermore, the second connecting end 301 of the top plug 30 has an annular protrusion 3011. The outer diameter of the annular protrusion 3011 is larger than the inner diameter of the top end 101, and the annular protrusion 3011 abuts and limits the contact with the end face of the top end 101. In this embodiment, the outer diameter of the annular protrusion 3011 is slightly larger than the inner diameter of the opening of the top end 101 of the sleeve 10 to ensure that the annular protrusion 3011 can tightly abut with the end face of the top end 101 of the sleeve 10, forming an effective sealing structure. The annular protrusion 3011 can effectively increase the contact area between the top plug 30 and the sleeve 10, improve the sealing effect, and reduce the risk of powder escaping from the top opening of the sleeve 10 during the pressing process. Moreover, after pressing, the annular protrusion 3011 provides a stable grip for demolding. The operator can use a tool to clamp the annular protrusion 3011 and easily pull the top plug 30 out of the sleeve 10, which significantly simplifies the demolding process and improves production efficiency.

[0064] Furthermore, the length of the second segment 22 is in the range of 15-30mm. In this embodiment, the second segment 22 serves as the interference fit between the core 20 and the rubber sleeve 10, and its length range of 15-30mm prevents the core 20 from detaching from the rubber sleeve 10 when the vibrator 52 vibrates due to excessive length, and also avoids waste caused by excessive length. Specifically, the length of the second segment 22 can be 15mm, 20mm, 30mm, etc.

[0065] Specifically, the second connecting end 301 of the top plug 30, which is the part that contacts and connects with the rubber sleeve 10, also has a length range of 15-30mm to ensure the stability of the connection. In this embodiment, the length of the second connecting end 301 is 15-30mm, which can prevent the top plug 30 from falling off the rubber sleeve 10 when the vibrator 52 vibrates due to excessive length, and also avoids waste due to excessive length. Specifically, the length of the second connecting end 301 can be 15mm, 20mm, 30mm, etc.

[0066] During assembly, the core 20 is inserted into the first tube segment 11 from the bottom of the sleeve 10, and the elasticity of the first tube segment 11 is used to fix the core 20. Then, the assembled mold assembly is placed into the outer shell 51, and the vibrator 52 is connected to the fixing hole 511 of the outer shell 51 by fasteners. Subsequently, powder is added through the opening 101 at the top of the sleeve 10. The feeding process adopts a semi-continuous feeding method, with the feeding stage and the vibration stage alternating. During the vibration stage, the vibrator 52 is turned on to vibrate the outer shell 51 to ensure that the powder can be evenly distributed in the U-shaped cavity 40. After the filling is completed, the top plug 30 is inserted from the opening 101 at the top of the sleeve 10 to form a completely closed U-shaped cavity 40. The vibrator 52 is turned off, and the assembled structure is placed in a vacuum bag and sealed or secured with rubber bands or the contact parts between the core 20 and the sleeve 10, as well as the contact parts between the sleeve 10 and the top plug 30. Then, it is placed in a cold isostatic press for pressing, and the pressing parameters are adjusted according to the characteristics of the powder. After pressing, open the top plug 30 and the rubber sleeve 10, and remove the ceramic U-shaped tube from the core 20 to complete the demolding process.

[0067] By using the above-mentioned mold assembly for ceramic tube processing, the following beneficial effects can be achieved:

[0068] 1. By adopting a simple mold structure and detachable connection between mold components, the use of additional connectors can be avoided, shortening mold installation and maintenance time, simplifying the loading and demolding process, and improving production efficiency.

[0069] 2. By setting the core and the curved structure formed by the cooperation of the rubber sleeve and the top plug, the bottom of the ceramic U-tube has a gradually changing curvature transition curve on both the inside and outside, which replaces the right angle structure in the existing technology. This can effectively avoid damage or short circuit of the U-tube caused by tip discharge and extend the service life of the ceramic U-tube.

[0070] 3. By setting up an outer shell and a vibrator, ceramic U-shaped tubes with uniform shape and wall thickness can be produced, thereby effectively improving the performance and quality of ceramic U-shaped tubes, enabling them to work stably in high temperature, high pressure and corrosive environments, and increasing the strength and reliability of the finished product.

[0071] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0072] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0073] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0074] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0075] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0076] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mold assembly for processing ceramic tubes, characterized in that, The mold assembly includes: A rubber sleeve (10) having a top end (101) and a bottom end (102) disposed opposite to each other, the rubber sleeve (10) being a hollow structure extending from the top end (101) to the bottom end (102); The core (20) has a first connecting end (201) and a first mating end (202) disposed opposite to each other along the extending direction of the rubber sleeve (10). The first connecting end (201) is in contact with and fixed to the bottom end (102). The first mating end (202) extends into the rubber sleeve (10) and is disposed near the top end (101). The end face of the first mating end (202) is curved. There is a first annularly disposed gap between the side wall of the core (20) and the side wall of the rubber sleeve (10). The top plug (30) has a second connecting end (301) and a second mating end (302) disposed opposite to each other. The second connecting end (301) is in contact with and fixed to the top end (101). The second mating end (302) extends into the rubber sleeve (10). The end face of the second mating end (302) is curved. There is a second gap between the first mating end (202) and the second mating end (302). The first gap and the second gap are interconnected. The rubber sleeve (10), the core (20), and the top plug (30) cooperate to form a U-shaped cavity (40).

2. The mold assembly according to claim 1, characterized in that, The sleeve (10) has a first pipe segment (11) and a second pipe segment (12) connected to each other. The inner diameter of the first pipe segment (11) is larger than the inner diameter of the second pipe segment (12). The first pipe segment (11) has the bottom end (102), and the second pipe segment (12) has the top end (101). The first pipe segment (11) and the second pipe segment (12) are connected by an arc transition. The second mating end (302) extends to the connection between the first pipe segment (11) and the second pipe segment (12). The inner wall surfaces of the first pipe segment (11) and the second pipe segment (12) at the connection point cooperate with the second mating end (302) to form a continuous curved surface structure.

3. The mold assembly according to claim 1, characterized in that, The distance between the core (20) and the inner wall of the rubber sleeve (10) and the distance between the core (20) and the top plug (30) are the same.

4. The mold assembly according to claim 1, characterized in that, The mold assembly further includes a vibration component (50), which is disposed on the outside of the rubber sleeve (10) and is used to vibrate the rubber sleeve (10).

5. The mold assembly according to claim 4, characterized in that, The vibration assembly (50) includes: The outer shell (51) is fitted on the outside of the rubber sleeve (10), and the inner wall of the outer shell (51) abuts against the outer wall of the rubber sleeve (10). The vibrator (52) is fixed on the outer wall of the outer shell (51), and the vibrator (52) transmits vibration to the rubber sleeve (10) through the outer shell (51).

6. The mold assembly according to claim 5, characterized in that, The outer casing (51) has a fixing hole (511) and a plurality of through holes (512) on its side wall. The vibrator (52) is connected to the fixing hole (511) by fasteners. The plurality of through holes (512) are evenly distributed on the outer casing (51).

7. The mold assembly according to claim 1, characterized in that, The core (20) includes a stepped first section (21), a second section (22) and a third section (23). The diameter of the first section (21) is smaller than the diameter of the third section (23). The first section (21) and the second section (22) are both located inside the rubber sleeve (10). The bottom end (102) of the rubber sleeve (10) abuts against the end face of the third section (23) near the second section (22). The second section (22) is press-fitted with the rubber sleeve (10). The first section (21) forms the first gap with the inner wall of the rubber sleeve (10). The first section (21) has the first mating end (202).

8. The mold assembly according to claim 1, characterized in that, The axes of the rubber sleeve (10), the core (20), and the top plug (30) coincide with each other.

9. The mold assembly according to claim 1, characterized in that, The second connecting end (301) of the top plug (30) has an annular protrusion (3011), the outer diameter of which is larger than the inner diameter of the top end (101), and the annular protrusion (3011) abuts against and limits the end face of the top end (101).

10. The mold assembly according to claim 7, characterized in that, The length of the second segment (22) is in the range of 15-30mm.

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