Vacuum extrusion equipment for ceramic mold blanks

Abstract

This utility model relates to the field of vacuum extrusion equipment for ceramic mold blanks, and discloses a vacuum extrusion device for ceramic mold blanks, including a cylinder. A rotating rod is rotatably connected inside the cylinder, and a feeding bin is fixedly connected to and communicates with the top side of the cylinder. A first knob is rotatably connected to the top side of the feeding bin, and a first threaded rod is coaxially fixedly connected to the first knob. A toothed plate is threaded onto the first threaded rod. A gear is rotatably arranged inside the feeding bin, and the gear meshes with the toothed plate. A gate is coaxially fixedly connected to the gear. In this utility model, the feeding adjustment mechanism achieves convenient and precise control of the feeding speed, solving the problem of difficult feed rate adjustment. Simultaneously, the extrusion head locking mechanism simplifies the disassembly and assembly steps, significantly shortens the time for mold replacement or cleaning and maintenance, improves production efficiency, and features a clever structure and strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of vacuum extrusion equipment for ceramic mold blanks, and more particularly to a vacuum extrusion equipment for ceramic mold blanks. Background Technology

[0002] In the production process of ceramic products, the quality of the raw material directly determines the performance of the final product. Vacuum extrusion equipment is a key piece of equipment for preparing high-density ceramic raw materials. By vacuuming and extruding the raw material, it can effectively remove air bubbles inside the raw material and improve the mechanical strength and density of the product.

[0003] The workflow of this type of equipment typically includes feeding, mixing and conveying, vacuum degassing, and extrusion molding. Throughout the continuous production process, the billet feeding speed is a crucial process parameter. The stability and accuracy of the feeding speed directly affect the filling degree and degassing effect of the material in the subsequent vacuum chamber, thus impacting the uniformity and continuity of the extruded billet.

[0004] However, some existing vacuum extrusion equipment for ceramic billets has shortcomings in controlling the feeding speed. It typically uses a simple manual baffle or fixed opening to control the feed rate, which is a rather coarse adjustment method and makes it difficult to achieve precise flow control. Operators often need to rely on experience and repeated trials when making adjustments, which is not only inconvenient but also makes it difficult to ensure the consistency of the production process across different batches, affecting production stability and automation levels.

[0005] Therefore, this utility model proposes a vacuum extrusion device for ceramic mold blanks to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of crude feeding speed control, inconvenient adjustment, and difficulty in ensuring process stability in the existing vacuum extrusion equipment for ceramic mold blanks, this utility model aims to provide a vacuum extrusion equipment for ceramic mold blanks with an improved structure that can effectively solve the above problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A vacuum extrusion device for ceramic mold blanks includes a cylinder, a rotating rod rotatably connected inside the cylinder, and a feeding bin fixedly connected to and communicating with the top side of the cylinder; The top side of the feeding hopper is rotatably connected to a first knob, the first knob is coaxially fixedly connected to a first threaded rod, the first threaded rod is threadedly connected to a toothed plate, a gear is rotatably arranged inside the feeding hopper, and the gear meshes with the toothed plate. The gear is coaxially fixedly connected to a gate, thereby driving the toothed plate to move up and down along the axial direction of the first threaded rod, and through the linkage of the gear and the gate, the opening degree of the feeding port of the feeding hopper can be precisely adjusted. The outer wall of the rotating rod is fixedly connected with stirring teeth and spiral blades. The stirring teeth are located in the middle section of the rotating rod, and the spiral blades are located at both ends of the rotating rod. This arrangement enables the material to be effectively stirred and mixed during the conveying process, especially in a vacuum environment, which helps to improve the degassing efficiency. The outer wall of the middle part of the cylinder is connected to a vacuum tube, and the top side of the cylinder is connected to an exhaust pipe. This structure provides the necessary interface for the core vacuum degassing function of the equipment, making it easy to connect to an external vacuum system and an exhaust system. The right end of the cylinder is detachably connected to an extrusion head via a snap ring. The snap ring is fixedly connected to the left side of the extrusion head. This structure forms the forming part of the equipment and provides a basis for its quick assembly and disassembly. A fixing tube is fixedly connected to the outer wall of the cylinder. A second knob is rotatably connected to one end of the fixing tube. A second threaded rod is coaxially fixedly connected to the second knob. An insert rod is threaded onto the second threaded rod. The end of the insert rod slides through the fixing tube and is adapted to the insertion hole of the insert ring. This mechanism can lock and unlock the extruder head by rotation, making the operation very convenient.

[0008] Furthermore, there are two fixing tubes, which are respectively fixed on the front and rear sides of the right end of the outer wall of the cylinder. The symmetrical layout provides a more stable and reliable fixed support for the extruder head.

[0009] Furthermore, there are two gates, each connected to one of the two gears, and the two gates can rotate relative to each other at the discharge port of the feeding bin to change the opening size. The dual-gate linkage design makes the adjustment of the discharge port smoother and more precise.

[0010] Furthermore, the cylinder is divided into a feeding section, a vacuum exhaust section, and an extrusion section from left to right along its length. This clear functional division allows each process step of the billet processing to be carried out in an orderly manner inside the equipment, ensuring the quality of the final product.

[0011] This utility model has the following beneficial effects: 1. In this utility model, by setting a feeding adjustment mechanism consisting of a first knob, a first threaded rod, a toothed plate, a gear and a gate, convenient and precise control of the feeding speed is achieved, effectively solving the problems of difficult feeding adjustment and reliance on experience in traditional equipment, and enhancing the adaptability of the equipment to different billet characteristics.

[0012] 2. In this utility model, the designed extrusion head locking mechanism allows the operator to drive the insert rod to lock or unlock the extrusion head simply by turning the second knob. Compared with the traditional bolt fixing method, this structure simplifies the disassembly and assembly steps, significantly shortens the time for mold replacement or cleaning and maintenance, and thus improves production efficiency.

[0013] 3. In this utility model, the equipment rationally divides the inside of the cylinder into feeding, vacuum degassing and extrusion sections. By setting stirring teeth in the vacuum degassing section, the billet is fully turned and broken under the conveying action of the spiral blades, which effectively promotes the escape of internal gas, improves the vacuum degassing effect, and helps to obtain ceramic products with a denser structure and better quality. Attached Figure Description

[0014] Figure 1 This is a perspective view of a vacuum extrusion device for ceramic mold blanks according to the present invention. Figure 2 This is a schematic diagram of the internal structure of the cylinder and feeding hopper of a ceramic mold blank vacuum extrusion device proposed in this utility model; Figure 3 This is a schematic diagram of the extrusion head structure of a vacuum extrusion device for ceramic mold blanks proposed in this utility model; Figure 4 This is a schematic diagram of the internal structure of the feeding hopper of a ceramic mold blank vacuum extrusion device according to the present invention. Figure 5 This is a schematic diagram of the toothed plate structure of a vacuum extrusion device for ceramic mold blanks proposed in this utility model. Figure 6 This is a schematic diagram of the internal structure of the fixed tube of a ceramic mold blank vacuum extrusion device proposed in this utility model.

[0015] Legend: 1. Cylinder; 2. Feeding bin; 3. Motor; 4. Extruder head; 5. Vacuum tube; 6. Exhaust pipe; 7. Fixed tube; 8. Insert ring; 9. Rotating rod; 10. Spiral blade; 11. Stirring teeth; 12. Gate plate; 13. Gear; 14. Tooth plate; 15. First threaded rod; 16. First knob; 17. Second threaded rod; 18. Insert rod; 19. Second knob. Detailed Implementation

[0016] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please refer to Figures 1 to 6 This utility model provides a vacuum extrusion device for ceramic mold blanks, which aims to solve the problems of inconvenient blank feeding speed adjustment and cumbersome extrusion head disassembly and assembly process in the prior art.

[0018] like Figure 1 and Figure 2 As shown, the vacuum extrusion equipment for ceramic mold blanks includes a cylinder 1. A feeding bin 2 is fixedly connected to the top side of the cylinder 1, and the lower part of the feeding bin 2 is connected to the internal space of the cylinder 1 for filling the cylinder 1 with blanks. The output end of the motor 3 is connected to one end of the rotating rod 9. The rotating rod 9 rotates through the inside of the cylinder 1, and the motor 3 drives the rotating rod 9 to rotate inside the cylinder 1 to convey and stir the blanks.

[0019] The equipment includes a feeding adjustment mechanism for controlling the amount of billet entering the cylinder 1 from the feeding bin 2.

[0020] Reference Figure 4 and Figure 5 The feeding adjustment mechanism includes a first knob 16 rotatably connected to the top side of the feeding bin 2. The bottom of the first knob 16 is coaxially fixedly connected to a vertically downward first threaded rod 15. The first knob 16 is a manual input component.

[0021] A toothed plate 14 is threadedly connected to the outer wall of the first threaded rod 15. The toothed plate 14 has an internal thread that matches the thread of the first threaded rod 15. When the first threaded rod 15 rotates, the toothed plate 14 is guided and constrained and cannot rotate, and then slides up and down along the axial direction of the first threaded rod 15.

[0022] The inside of the feeding bin 2 is equipped with a rotating gear 13. The teeth of the gear plate 14 mesh with the teeth of the gear 13, and the up-and-down sliding motion of the gear plate 14 can be converted into the rotational motion of the gear 13.

[0023] The gate 12 is coaxially fixedly connected to the gear 13. The gate 12 is located at the discharge outlet of the discharge bin 2. The rotation of the gear 13 drives the gate 12 to rotate synchronously.

[0024] In this embodiment, there are two gates 12, each connected to a corresponding gear 13. The two gears 13 simultaneously mesh with a gear plate 14. When the first knob 16 is rotated, the gear plate 14 simultaneously drives the two gears 13 to rotate in opposite directions, thereby controlling the opening and closing degree between the two gates 12 and achieving precise adjustment of the feeding speed.

[0025] Please refer to the following carefully. Figure 1 , Figure 3 and Figure 6 The core structure will be described in detail below: A retaining ring 8 is fixedly connected to the left side of the extrusion head 4. The extrusion head 4 is detachably inserted into the right end of the cylinder 1 through the retaining ring 8. The extrusion head 4 is used to extrude the blank conveyed in the cylinder 1 into shape.

[0026] The extrusion head locking mechanism includes a fixing tube 7, which is fixedly connected to the outer wall of the cylinder 1. In this embodiment, there are two fixing tubes 7, which are symmetrically fixed on the front and rear sides of the right end of the outer wall of the cylinder 1 to provide a stable and reliable locking effect.

[0027] A second knob 19 is rotatably connected to the end of the fixed tube 7 away from the cylinder 1. A second threaded rod 17 is coaxially fixedly connected to the inner side of the second knob 19 and is housed inside the fixed tube 7.

[0028] The outer wall of the second threaded rod 17 is threaded with a plug rod 18. The end of the plug rod 18 slides through the fixed tube 7 toward one end of the cylinder 1. The plug ring 8 has a plug hole that matches the shape and size of the end of the plug rod 18.

[0029] When it is necessary to lock the extruder head 4, the operator turns the second knob 19, which drives the second threaded rod 17 to rotate synchronously. Due to the threaded transmission relationship, the insert rod 18 will extend along its axis and insert into the insertion hole of the insert ring 8, thereby locking the extruder head 4. Turning the second knob 19 in the opposite direction will cause the insert rod 18 to exit from the insertion hole of the insert ring 8, thus unlocking the device.

[0030] Reference Figure 2 To achieve the conveying and vacuum treatment of the billet, a spiral blade 10 and a stirring tooth 11 are fixedly connected to the outer wall of the rotating rod 9. The spiral blade 10 is respectively set at both ends of the rotating rod 9 and is used to push the billet in the axial direction.

[0031] The stirring teeth 11 are fixed in the middle section of the rotating rod 9. The cylinder 1 is divided into a feeding section, a vacuum exhaust section and an extrusion section from left to right along its length. The stirring teeth 11 are positioned to correspond to the vacuum exhaust section.

[0032] A vacuum tube 5 is connected to the outer wall of the middle section of the cylinder 1, and an exhaust pipe 6 is connected to its top side. The vacuum tube 5 is used to connect an external vacuum pump to evacuate the inside of the cylinder 1. The stirring teeth 11 turn and break the billet in the vacuum environment, which helps the gas inside the billet to escape. The escaped gas is drawn away by the external pumping equipment through the exhaust pipe 6.

[0033] Based on the above embodiments, the present invention may further include the following preferred technical solutions: As a preferred embodiment, refer to Figure 2 The stirring teeth 11 and spiral blades 10, fixedly connected to the outer wall of the rotating rod 9, provide the structural basis for mixing and conveying the billet. The stirring teeth 11 are located in the middle section of the rotating rod 9, corresponding to the vacuum outlet section of the cylinder 1. Their shape and arrangement help to fully tumble, shear, and tear the billet to increase the surface area of ​​the billet exposed in the vacuum environment. The spiral blades 10 are located at both ends of the rotating rod 9. The spiral blade 10 at the left end is responsible for conveying the billet falling from the feeding hopper 2 from the feeding section to the vacuum outlet section, while the spiral blade 10 at the right end is responsible for pressurizing and conveying the billet after vacuum degassing from the vacuum outlet section to the extrusion section and pushing it into the extruder head 4.

[0034] As another preferred embodiment, refer to Figure 2 To achieve efficient vacuum degassing, the structure of cylinder 1 is divided into zones. A vacuum pipe 5 is connected to the outer wall of the middle section of cylinder 1, which connects to an external vacuum pump to provide a negative pressure environment for the vacuum exhaust section. On the top side of cylinder 1, also within the vacuum exhaust section, an exhaust pipe 6 is connected to promptly discharge the gas escaping from the billet, preventing gas accumulation inside the equipment.

[0035] As another preferred embodiment, refer to Figure 1 and Figure 3 The extruder head 4 and the cylinder 1 are connected by a quick-connect structure. The left side of the extruder head 4 is integrally formed or fixedly connected with a retaining ring 8. The outer diameter of the retaining ring 8 is slidably engaged with the inner diameter of the cylinder 1, so that the extruder head 4 can be easily inserted into or pulled out of the right end opening of the cylinder 1.

[0036] As another preferred embodiment, refer to Figure 1 and Figure 6 To ensure the stable locking of the extruder head 4 during operation, the structure of the extruder head locking mechanism has been refined. Preferably, there are two fixing tubes 7, which are symmetrically fixed on the front and rear sides of the right end of the outer wall of the cylinder 1. This symmetrical arrangement makes the locking force of the insert rod 18 on the insert ring 8 more uniform, avoiding the possible misalignment or loosening caused by single-point locking.

[0037] As another preferred embodiment, refer to Figure 4To achieve smooth adjustment of the feeding speed, two gates 12 are preferably used in the feeding adjustment mechanism. Each gate 12 is driven by two independent gears 13, which simultaneously mesh with a toothed plate 14. When the toothed plate 14 moves up and down, the two gears 13 rotate in opposite directions, causing the two gates 12 to open or close the feeding port synchronously. This linkage design makes the opening and closing control of the feeding port more precise and stable.

[0038] As another preferred embodiment, refer to Figure 2 The internal space of cylinder 1 is clearly divided into three functional sections according to the process flow. From left to right, they are the feeding section, the vacuum exhaust section, and the extrusion section. The feeding section receives materials from the feeding hopper 2, the vacuum exhaust section completes degassing in the stirring teeth 11 and in a vacuum environment, and the extrusion section performs final compression and pushing on the degassed billet. This functional zoning makes the entire billet processing process clearer and more efficient.

[0039] Working principle: This device is mainly composed of a feeding bin 2, a cylinder 1 and an extrusion head 4 from the upper left to the lower right. The feeding bin 2 is fixed on the top side of the left end of the cylinder 1. An insert ring 8 is fixed on the left side of the extrusion head 4 and is inserted into the right end of the cylinder 1. The cylinder 1 is divided into three sections, from left to right: a feeding section, a vacuum exhaust section and an extrusion section. In operation, the billet is poured into the feeding hopper 2, and then falls from the feeding hopper 2 into the left end of the cylinder 1. At the same time, the motor 3 installed at the left end of the cylinder 1 is started, which drives the rotating rod 9 to rotate. The rotating rod 9 rotates the spiral blades 10 and stirring teeth 11 fixed on its outer wall. The spiral blades 10 are divided into two ends, one on the left and one on the right. The stirring teeth 11 are fixed in the middle section of the rotating rod 9. The billet falling into the left end of the cylinder 1 is transported to the middle of the cylinder 1 through the spiral blades 10 at the left end. Then, the vacuum tube 5 fixed to the front side of the middle of the cylinder 1 creates a vacuum inside the cylinder 1. At the same time, the stirring teeth 11 agitate the billet. The air bubbles inside the billet expand and burst under negative pressure, and are then discharged through the exhaust pipe 6 fixed to the top side of the cylinder 1. The vacuum pipe 5 is connected to an external vacuum pump, and the exhaust pipe 6 is connected to an external air extraction device. These external structures are not within the scope of this application and are therefore not described in detail in the specification. They all adopt existing technology. Other structures or technologies not mentioned in this application adopt existing structures and technologies and will not be described in detail here. Afterwards, the billet is transported to the right end of the cylinder 1 under the push of the subsequent billet, and then transported to the extrusion head 4 through the spiral blade 10 at the right end. Finally, it is extruded and formed through the extrusion head 4. At the same time, the first knob 16, which is rotatably connected to the top side of the feeding bin 2 via the damping shaft, can be rotated to make the first threaded rod 15 rotate, which drives the toothed plate 14, which is threadedly connected to its outer wall, to slide up and down inside the feeding bin 2. The toothed plate 14 drives the gate 12 to rotate inside the feeding bin 2 through the gear 13 that meshes with it, thereby adjusting the opening degree between the two gates 12, and thus adjusting the amount of billet that can pass between the two gates 12 at the same time, so as to facilitate the staff to control the feeding speed. When it is necessary to disassemble the extruder head 4, rotate the second knob 19, which is connected to one end of the fixed tube 7 (there are two fixed tubes 7, which are fixed to the front and rear sides of the right end of the outer wall of the cylinder 1 respectively) via the damping shaft. This will cause the second threaded rod 17 to drive the insert rod 18, which is threaded to its outer wall, to slide, so that the insert rod 18 disengages from the insert ring 8. Then the extruder head 4 can be pulled off from the right end of the cylinder 1, thus completing the disassembly process of the extruder head 4. The installation process of the extruder head 4 is the reverse of the above, and will not be described in detail here.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vacuum extrusion device for ceramic mold blanks, comprising a cylinder (1), wherein a rotating rod (9) is rotatably connected inside the cylinder (1), and a feeding bin (2) is fixedly connected to and communicates with the top side of the cylinder (1), characterized in that: The top side of the feeding bin (2) is rotatably connected to a first knob (16), the first knob (16) is coaxially fixedly connected to a first threaded rod (15), the first threaded rod (15) is threadedly connected to a toothed plate (14), a gear (13) is rotatably arranged inside the feeding bin (2), and the gear (13) meshes with the toothed plate (14), the gear (13) is coaxially fixedly connected to a gate plate (12); The outer wall of the rotating rod (9) is fixedly connected with stirring teeth (11) and spiral blades (10). The stirring teeth (11) are located in the middle section of the rotating rod (9), and the spiral blades (10) are located at both ends of the rotating rod (9). The outer wall of the middle part of the cylinder (1) is connected to a vacuum tube (5), and the top side of the cylinder (1) is connected to an exhaust pipe (6). The right end of the cylinder (1) is detachably connected to an extrusion head (4) via a retaining ring (8), and the retaining ring (8) is fixedly connected to the left side of the extrusion head (4); A fixed tube (7) is fixedly connected to the outer wall of the cylinder (1). A second knob (19) is rotatably connected to one end of the fixed tube (7). A second threaded rod (17) is coaxially fixedly connected to the second knob (19). An insert rod (18) is threadedly connected to the second threaded rod (17). The end of the insert rod (18) slides through the fixed tube (7) and is adapted to the insertion hole of the insert ring (8).

2. A ceramic mold green vacuum extrusion apparatus according to claim 1, wherein: The number of fixed tubes (7) is two, and they are fixed on the front and rear sides of the right end of the outer wall of the cylinder (1), respectively.

3. The vacuum extrusion equipment for ceramic mold blanks according to claim 1, characterized in that: There are two gates (12), and the two gates (12) are respectively connected to the two gears (13). The two gates (12) can rotate relative to each other at the discharge port of the discharge bin (2) to change the size of the opening.

4. The vacuum extrusion equipment for ceramic mold blanks according to claim 1, characterized in that: The cylinder (1) is divided into a feeding section, a vacuum outlet section and an extrusion section from left to right along its length.

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