Viscosity self-adaptive adjusting nozzle of ceramic core pressing machine

Abstract

The invention relates to the technical field of special ceramic manufacturing, and discloses a ceramic core press viscosity self-adaptive adjusting nozzle which comprises a shell, a nozzle head and a supporting assembly arranged in the shell, and the supporting assembly comprises a valve element and a reset spring. Through the synergistic effect of the tungsten carbide-ceramic composite nozzle head and the memory alloy driving mechanism, self-adaptive adjustment of the temperature and the viscosity in the ceramic slurry conveying process is achieved, the dual effect that the valve element with the 60-degree taper angle is matched with the shape memory alloy spring and the reset spring is achieved, the opening size can be automatically adjusted according to temperature changes, and the ceramic slurry conveying efficiency is improved. The problems of leakage and blockage under the high-pressure condition are effectively solved, the uniformly-distributed heating rods are matched with thermocouple monitoring to form a stable temperature field, excellent wear resistance, sealing performance and temperature responsiveness are achieved, the forming quality and production efficiency of the ceramic core are remarkably improved, leakage can be effectively prevented, the core is protected against damage, and the service life of the ceramic core is prolonged. Meanwhile, the service life of the nozzle is prolonged, and production efficiency and finished product quality are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of special ceramic manufacturing, and particularly relates to a viscosity self-adaptive adjusting nozzle of a ceramic core press. BACKGROUND

[0002] The ceramic core press sprays ceramic slurry into a mold through high pressure to form a complex part structure, but in the heating process, the viscosity of the adhesive such as resin is significantly reduced with the increase of temperature, which causes the traditional fixed opening nozzle to be difficult to adapt to the dynamic viscosity change, and causes problems such as dripping pollution, uneven spraying and blockage. At present, the way of manually adjusting the nozzle according to experience has hysteresis and insufficient precision, and the improved scheme of using an electric or pneumatic valve also faces technical defects such as valve core wear and seal failure caused by high abrasiveness of the ceramic slurry, complex structure of the external control system, high failure rate and high maintenance cost. SUMMARY

[0003] In view of the above problems of the existing nozzle of the ceramic core press, the present application is proposed.

[0004] Therefore, the present application aims to provide a viscosity self-adaptive adjusting nozzle of a ceramic core press, which aims to: the device realizes the self-adjustment of the opening through the combination of mechanical structure and material science innovation, does not need to rely on a complex control system, and significantly improves the spraying stability and equipment life.

[0005] To solve the above technical problems, the present application provides the following technical scheme: a support assembly is arranged in the shell, the support assembly comprises a valve core, a reset spring, a shape memory alloy spring and a baffle, and a heating rod is arranged between the shell and the cavity.

[0006] As a preferred scheme of the viscosity self-adaptive adjusting nozzle of the ceramic core press, the shell is provided with a valve port, and an upper cover is mounted on the upper part of the valve port.

[0007] As a preferred scheme of the viscosity self-adaptive adjusting nozzle of the ceramic core press, the nozzle head comprises a first sealing ring and a first opening, and is fixed by the third opening of the shell.

[0008] As a preferred scheme of the viscosity self-adaptive adjusting nozzle of the ceramic core press, the shell further comprises a second opening, a clamping groove and a channel, and the cavity is mounted through the clamping groove on the shell.

[0009] As a preferred scheme of the viscosity self-adaptive adjusting nozzle of the ceramic core press, the rear part of the conical surface of the valve core is provided with the shape memory alloy spring, the tail part of the valve core is provided with the reset spring, and the reset spring is fixed by the baffle.

[0010] As a preferred scheme of the viscosity self-adaptive adjusting nozzle of the ceramic core press machine, the shape memory alloy spring is externally provided with a memory alloy spring protective cover, and the reset spring is externally provided with a spring protective cover.

[0011] As a preferred scheme of the viscosity self-adaptive adjusting nozzle of the ceramic core press machine, the memory alloy spring protective cover is externally provided with through holes on the circumference, and the second opening of the shell is provided with a thermocouple.

[0012] As a preferred scheme of the viscosity self-adaptive adjusting nozzle of the ceramic core press machine, the upper cover is provided with a fourth opening and is in sealing connection with the upper end face of the shell through a second sealing ring.

[0013] As a preferred scheme of the viscosity self-adaptive adjusting nozzle of the ceramic core press machine, the heating rods are uniformly distributed along the circumference between the shell and the cavity.

[0014] As a preferred scheme of the viscosity self-adaptive adjusting nozzle of the ceramic core press machine, the upper cover is installed through the upper end face of the shell, and a second sealing ring is arranged therebetween.

[0015] The beneficial effects of the present application are as follows: through the cooperation of the tungsten carbide-ceramic composite nozzle head and the memory alloy driving mechanism, the temperature and viscosity of the ceramic slurry during the conveying process are self-adaptively adjusted; the 60° conical valve core cooperates with the double effects of the shape memory alloy spring and the reset spring, and can automatically adjust the opening size according to the temperature change, effectively solving the problems of dripping and blocking under high pressure; the uniformly distributed heating rods cooperate with the thermocouple monitoring to form a stable temperature field, and have excellent wear resistance, sealing performance and temperature responsiveness, which significantly improves the forming quality and production efficiency of the ceramic core, effectively prevents dripping, protects the core from being damaged, prolongs the service life of the nozzle, and improves the production efficiency and product quality. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0017] Fig. 1 It is a schematic diagram of the overall structure of the present application.

[0018] Fig. 2 It is a partial schematic diagram of the support assembly structure of the present application.

[0019] Fig. 3 It is a schematic diagram of the axial displacement of the valve core.

[0020] In the figure: 1, shell; 101, second opening; 102, clamping groove; 103, third opening; 2, nozzle head; 201, first sealing ring; 202, first opening; 3, support assembly; 301, spring protection cover; 302, memory alloy spring protection cover; 303, valve core; 304, return spring; 305, shape memory alloy spring; 306, blocking piece; 307, valve port; 308, channel; 4, chamber; 5, heating rod; 6, thermocouple; 7, upper cover; 701, second sealing ring; 702, fourth opening; 8, through hole. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in conjunction with the drawings.

[0022] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the scope of the present application. Accordingly, the present application is not limited to the specific embodiments disclosed below.

[0023] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or alternative embodiment.

[0024] Thirdly, the present application is described in detail in conjunction with the schematic diagram. In the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is partially enlarged without general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual manufacture.

[0025] EMBODIMENT

[0026] REFERENCE Figs. 1-3 For the embodiments of the present application, a ceramic core pressing machine viscosity self-adaptive adjusting nozzle is provided, which comprises a shell 1, a nozzle head 2 and a support assembly 3 arranged inside the shell 1, the support assembly 3 comprising a valve core 303, a return spring 304, a shape memory alloy spring 305 and a blocking piece 306, and a heating rod 5 is arranged between the shell 1 and the chamber 4.

[0027] The compact layout of the nozzle device is realized by integrated design, and the cooperation of the shape memory alloy spring 305 and the reset spring 304 can automatically adjust the position of the valve core 303 according to temperature changes, effectively preventing leakage under high pressure conditions.

[0028] Specifically, the housing 1 is provided with a valve port 307, and the upper part of the housing 1 is provided with an upper cover 7. The nozzle head 2 comprises a first sealing ring 201 and a first opening 202, and is fixed by the third opening 103 of the housing 1.

[0029] The nozzle head 2 made of tungsten carbide-ceramic composite material realizes double sealing through the first sealing ring 201, which not only ensures the wear resistance under high temperature conditions, but also ensures the sealing reliability under high pressure environment. The accurate size design of the first opening 202 can optimize the flow characteristics of the slurry.

[0030] Further, the housing 1 further comprises a second opening 101, a clamping groove 102 and a channel 308, and the chamber 4 is installed through the clamping groove 102 on the housing 1.

[0031] The modular design of the housing 1 structure facilitates the assembly and maintenance of various components. The second opening 101 is used to install a temperature monitoring element, and the clamping groove 102 ensures the accurate positioning and installation of the chamber 4.

[0032] Preferably, the rear of the valve core 303 is provided with a shape memory alloy spring 305, the tail of the shape memory alloy spring 305 is provided with a reset spring 304, and the reset spring 304 is fixed by a baffle 306. The shape memory alloy spring 305 is externally provided with a memory alloy spring protection cover 302, and the reset spring 304 is externally provided with a spring protection cover 301.

[0033] The valve core 303 with a 60° taper angle is designed to cooperate with the double spring system to realize precise flow control: the reset spring 304 pushes the valve core 303 forward to reduce the opening and increase the flow resistance at low temperature, and the memory alloy spring 305 expands to move the valve core 303 backward to enlarge the opening and realize self-adaptive adjustment at high temperature. The double protection cover design not only prevents mechanical damage to the spring system, but also realizes efficient heat conduction through the through hole 8 on the protection cover 302, ensuring the timeliness of temperature response.

[0034] Further, the memory alloy spring protection cover 302 is provided with a through hole 8 on the outer circumference, and the housing 1 is provided with a thermocouple 6 in the second opening 101. The upper cover 7 is provided with a fourth opening 702 and is sealed and connected with the upper end surface of the housing 1 through a second sealing ring 701.

[0035] The through hole 8 enhances the heat exchange efficiency, the thermocouple 6 monitors the temperature in real time to prevent material carbonization, and the sealing design of the upper cover 7 ensures the sealing performance under high pressure working environment.

[0036] Further, the heating rods 5 are evenly distributed along the circumference between the shell 1 and the chamber 4, and the upper cover 7 is installed through the upper end surface of the shell 1, and a second sealing ring 701 is arranged therebetween.

[0037] Among them, the tangentially arranged heating rods 5 form a uniform temperature field, and the second sealing ring 701 realizes double sealing, ensuring that the ceramic slurry maintains stable temperature and viscosity characteristics during the entire working process.

[0038] In use, when the ceramic slurry enters the inner cavity of the shell 1, the heating rods 5 start heating, and the thermocouple 6 monitors the temperature in real time; in a low-temperature state, the high-viscosity slurry promotes the return spring 304 to push the valve core 303 to move forward, reducing the valve port 307 to increase the flow resistance; as the temperature rises, the shape memory alloy spring 305 expands under heat, overcoming the resistance of the return spring 304 to pull the valve core 303 to move backward, expanding the valve port 307 to reduce the flow resistance; the first opening 202 of the tungsten carbide-ceramic composite nozzle head 2 uniformly extrudes the slurry, and the first sealing ring 201 and the second sealing ring 701 ensure that there is no leakage during the entire working process, thereby realizing self-adaptive flow regulation and stable output of the ceramic slurry at different temperatures.

[0039] In summary, by adopting modular design, the shell 1, the tungsten carbide-ceramic composite nozzle head 2 and the intelligent adjustment assembly are composed, wherein the nozzle head 2 realizes high-pressure sealing through the first sealing ring 201, the valve core 303 with a 60° taper angle, the shape memory alloy spring 305 and the return spring 304 form a self-adaptive flow regulation system, and cooperate with the evenly distributed heating rods 5 and the thermocouple 6 to realize precise temperature control. The device realizes automatic adjustment of the viscosity of the ceramic slurry through intelligent temperature control, effectively solves the problems of dripping and clogging under high-pressure working conditions, and the tungsten carbide-ceramic material and double-sealing design ensure the wear resistance and sealing performance under high-temperature and high-pressure environment, significantly improving the forming quality and production efficiency of the ceramic core.

[0040] It is important to note that the construction and arrangement of the application shown in the various examples presented are illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements can be altered or varied. Thus, all such modifications are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be varied or re-sequenced without materially affecting the application. Any "apparatus" or "device" described herein can be a structure that performs the recited function, not necessarily composed of all the means or elements specifically disclosed. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present application. Accordingly, the present application is not limited to the particular embodiments described herein, but extends to all structures that would fall within the scope of the appended claims.

[0041] Also, in order to provide a concise description of the exemplary embodiments, not all features of an actual implementation can be described (i.e., those related to the

[0042] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application, not limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A ceramic press core machine viscosity self-adapting regulation nozzle, characterized in that: The utility model provides a kind of nozzle, including shell (1), nozzle head (2) and support assembly (3) arranged inside shell (1), the support assembly (3) includes valve core (303), reset spring (304), shape memory alloy spring (305) and baffle (306), heating rod (5) is equipped between the shell (1) and chamber (4).

2. The ceramic press core machine viscosity self-adaptive regulating nozzle according to claim 1, characterized in that: Upper portion of the valve port (307) in the shell (1) is equipped with upper cover (7).

3. The ceramic press core machine viscosity self-adaptive regulating nozzle of claim 2, wherein: The nozzle head (2) includes first sealing ring (201) and first opening (202), and is fixed by the third opening (103) of shell (1).

4. The ceramic press core machine viscosity self-adaptive regulating nozzle of claim 3, wherein: The shell (1) further includes second opening (101), clamping groove (102) and passage (308), and the chamber (4) is installed through the clamping groove (102) on shell (1).

5. The ceramic press core machine viscosity self-adaptive regulating nozzle of claim 4, wherein: The conical surface rear of the valve core (303) is equipped with shape memory alloy spring (305), the tail of reset spring (304) is equipped with reset spring (304), and the reset spring (304) is fixed by baffle (306).

6. The ceramic press core machine viscosity self-adaptive regulating nozzle of claim 5, wherein: The shape memory alloy spring (305) is equipped with memory alloy spring protective cover (302) outside, and the reset spring (304) is equipped with spring protective cover (301) outside.

7. The ceramic press core machine viscosity self-adaptive regulating nozzle of claim 6, wherein: The memory alloy spring protective cover (302) is equipped with through hole (8) on the outside circumference, and thermocouple (6) is installed in the second opening (101) of shell (1).

8. The ceramic press core machine viscosity self-adaptive regulating nozzle of claim 7, wherein: The upper cover (7) is equipped with fourth opening (702) and is sealedly connected with the upper end surface of shell (1) by second sealing ring (701).

9. The ceramic press tooling viscosity self-adaptive adjustment nozzle of claim 8, wherein: The heating rod (5) is evenly distributed along the circumference between shell (1) and chamber (4).

10. The ceramic press tooling viscosity self-adaptive adjustment nozzle of claim 9, wherein: The upper cover (7) is installed through the upper end surface of shell (1), and second sealing ring (701) is arranged therebetween.

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