Multi-layer continuous type slip casting molding apparatus

Abstract

This invention relates to a multi-layer continuous grouting molding equipment, belonging to the field of ceramic molding technology. It includes a pressure system, a grouting system, a pressure frame, several layers of molds, and a layer-by-layer cutting system. Each layer of molds is stacked on the pressure frame, forming a grouting channel that runs vertically through each mold. The layer-by-layer cutting system includes a vacuum rigid tube, a vacuum reference block, a shrinkage bladder, several ejection devices, several hydraulic power devices, and a sealing ring. The sealing ring is compatible with an iron ring. The vacuum rigid tube extends into the grouting channel. Each vacuum reference block is installed on the outside of the vacuum rigid tube. The shrinkage bladder is installed on the outside of the vacuum reference block. Each ejection device is slidably installed along the circumference of the vacuum reference block and is located inside the shrinkage bladder. Each hydraulic power device is slidably installed on the vacuum reference block and is connected to the ejection device via a transmission connection. The telescopic end of the hydraulic power device is located on the upper side of the vacuum reference block, ensuring that the molding pressure of each layer of molds is equal.

Description

Technical Field

[0001] This invention relates to the field of ceramic forming technology, and in particular to a multi-layer continuous slip casting equipment. Background Technology

[0002] Multi-layer ceramic slip casting equipment is a specialized molding tool used to produce ceramic products with complex structures. It is mainly applied in the fields of precision ceramics, electronic ceramics, and art ceramics. Based on the slip casting principle, this equipment achieves efficient and high-precision ceramic blank forming through a multi-layer mold stacking design and an automated control system.

[0003] The core structure of the equipment includes multi-layer mold units, a hydraulic or pneumatic mold-closing system, a slurry injection circulation system, and an intelligent temperature-controlled drying module. During operation, multiple molds are stacked vertically, and after closing, high-solids-content ceramic slurry is injected into the mold cavity via vacuum pressurized slurry injection. The gypsum or polymer porous mold absorbs moisture through capillary action, forming a uniform green layer. The equipment supports the simultaneous molding of dozens of green bodies, significantly improving the production capacity per unit area.

[0004] Compared with traditional single-layer grouting, this equipment has three major advantages: First, the clamping force and grouting parameters are digitally adjustable, ensuring consistent density in each layer of the green body; second, it is equipped with a rapid drying and automatic demolding mechanism, shortening the production cycle by more than 30%; and third, it adopts a closed-loop grout circulation and waste liquid recovery system, reducing raw material loss and meeting clean production requirements. It is suitable for mass production of ceramic valve cores, structural components, precision insulators, and other products, and is a key process equipment for modern ceramic manufacturing to achieve quality and efficiency improvements.

[0005] During grouting, the pressure on each layer of the mold is different, with the lower side being higher than the upper side, which can easily lead to problems such as different thicknesses of the blanks in each layer of the mold. Summary of the Invention

[0006] To overcome the technical defects of the existing technology, the present invention provides a multi-layer continuous injection molding equipment to ensure that the molding pressure of each layer of mold is equal.

[0007] The technical solution adopted in this invention is: A multi-layer continuous grouting molding equipment includes a pressure system, a vacuum system, a grouting system, a pressure frame, several layers of molds, and a layer cutting system. The pressure system is mounted on the pressure frame, and the molds are stacked on the pressure frame. The pressure system clamps the molds, and each mold forms a grouting channel that runs vertically through the grouting channel. Each mold has an iron ring on its upper side within the grouting channel. The layer cutting system includes a vacuum rigid tube, a vacuum reference block, a shrinkage air bladder, several ejection devices, several hydraulic power devices, and a sealing ring. Each ejection device forms an arc shape inside the shrinkage air bladder. The sealing ring is adapted to fit the iron ring. The vacuum rigid tube is connected to the vacuum system. The vacuum rigid tube extends into the grouting channel, and each vacuum reference block is installed on the outside of the vacuum rigid tube. The shrinkage airbag is installed on the outside of the vacuum reference block. The vacuum reference block has an air passage connecting the vacuum rigid tube and the shrinkage airbag. Each ejection device is equidistantly arranged around the circumference of the vacuum reference block and is slidably installed inside the vacuum reference block. Each ejection device is located inside the shrinkage airbag. Each hydraulic power device is slidably installed on the vacuum reference block and is connected to the ejection device. The sealing ring is installed on the outside of the shrinkage airbag, and the telescopic end of the hydraulic power device is located on the upper side of the vacuum reference block.

[0008] Preferably, the pressure system includes a pressure cylinder and a lower pressure plate, the lower pressure plate being installed at the output end of the pressure cylinder, and the pressure cylinder being installed on a pressure frame.

[0009] Preferably, the vacuum system includes a vacuum pump and a vacuum tube, the vacuum pump is mounted on a pressure frame, the vacuum pump is connected to the vacuum tube, and the vacuum tube is connected to a rigid vacuum tube.

[0010] Preferably, the grouting system includes a grouting pipe and a grouting pump, wherein the grouting pump is connected to the grouting pipe and the grouting pipe is connected to the grouting channel.

[0011] Preferably, the inner side of the contractile airbag is provided with several support plates.

[0012] Preferably, the contractile airbag is fitted over the vacuum reference block, and the contractile airbag is mounted on the vacuum reference block by two annular pressure plates.

[0013] Preferably, the sidewall cross-section of the contraction airbag is trapezoidal, and the side of the contraction airbag closer to the iron ring is wider than the side of the contraction airbag farther from the iron ring.

[0014] Preferably, the hydraulic power device includes a pressure plunger, the side of the pressure plunger near the ejection device is provided with an inclined surface, and the vacuum reference block is provided with a blocking ring to limit the extreme position of the pressure plunger.

[0015] The beneficial effects of this invention are: The pressure system is installed on the pressure frame, and the molds are stacked on the pressure frame. The pressure system clamps the molds, and each mold forms a grouting channel that runs through the vertical direction, which facilitates the unified grouting of each mold layer. In other words, after the grout is injected from the grouting channel, it flows downward from the position of each mold layer and fills each mold layer in sequence. Each mold has an iron ring on the upper side of the grouting channel. When the layer cutting system is in contact with the iron ring, it is sealed, which facilitates the layer cutting system to divide the grouting channel into several layers.

[0016] The layered cutting system includes a vacuum rigid tube, a vacuum reference block, a shrinkage air bladder, several ejection devices, several hydraulic power devices, and a sealing ring. Each ejection device forms an arc shape inside the shrinkage air bladder. The ejection of each ejection device causes the shrinkage air bladder to expand. After the shrinkage air bladder expands, the sealing ring adapts to the iron ring to achieve a seal. The vacuum rigid tube is connected to the vacuum system and extends into each layer of mold through the grouting channel.

[0017] During grouting, negative pressure is introduced into the vacuum rigid tube, causing the shrinkage airbag to retract, the sealing ring to separate from the iron ring, and thus opening the grouting channel, allowing grout to flow into each layer of molds. Each vacuum reference block is installed on the outside of the vacuum rigid tube, and the shrinkage airbag is installed on the outside of the vacuum reference block. The vacuum reference block has an air passage connecting the vacuum rigid tube and the shrinkage airbag. Each ejection device is arranged equidistantly along the circumference of the vacuum reference block and is slidably installed inside the vacuum reference block. The height of each hydraulic power device in the grouting channel is different, so the pressure of the mud it experiences is different. The general rule is that the lower the hydraulic power device, the greater the sliding distance it travels inward towards the vacuum reference block under the action of mud pressure, resulting in a greater degree to which the hydraulic power device ejects the ejection device, thereby closing the grouting channel at that position. In other words, during the pressurized grouting process of the grouting system, each layer of mold is closed and grouting stops sequentially from bottom to top, so that the grouting pressure of each layer of mold is eventually consistent.

[0018] Each ejector is located inside a contraction air bladder, and each hydraulic power unit is slidably mounted on a vacuum reference block. Each hydraulic power unit is connected to the ejector via a transmission mechanism. Under the pressure of the mud, the hydraulic power unit slides inward toward the vacuum reference block, thereby ejecting the corresponding ejector and causing the contraction air bladder to expand. A sealing ring is installed on the outside of the contraction air bladder, and the sealing ring and the iron ring are squeezed together to achieve a seal. The mud flows in from the upper side of the vacuum reference block. After the grouting channel on the lower side of the sealing ring is sealed, the hydraulic power unit can still sense the mud pressure on the upper side and react accordingly. Therefore, the telescopic end of the hydraulic power unit is located on the upper side of the vacuum reference block. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2This is a schematic diagram of the layered cutting system structure.

[0021] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0022] Figure 4 This is a schematic diagram showing the installation relationship between the layered cutting system and the mold.

[0023] Figure 5 This is a schematic diagram of the layered cutting system structure.

[0024] Explanation of reference numerals in the attached figures: 1. Pressure system; 11. Pressure cylinder; 12. Lower pressure plate; 2. Vacuum system; 3. Grouting system; 4. Pressure frame; 5. Mold; 51. Grouting channel; 52. Iron ring; 6. Layered cutting system; 61. Vacuum rigid tube; 62. Vacuum reference block; 621. Air passage; 622. Blocking ring; 63. Contraction airbag; 631. Support plate; 64. Ejection device; 65. Hydraulic power unit; 651. Pressure plunger; 6511. Inclined surface; 66. Sealing ring; 67. Annular pressure plate. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings: like Figure 1 — Figure 5 As shown, this embodiment provides a multi-layer continuous grouting molding device, including a pressure system 1, a vacuum system 2, a grouting system 3, a pressure frame 4, several layers of molds 5, and a layer cutting system 6. The pressure system 1 is installed on the pressure frame 4, and the layers of molds 5 are stacked on the pressure frame 4. The pressure system 1 clamps the molds 5, and each mold 5 forms a grouting channel 51 that runs through the vertical direction, which facilitates the uniform grouting of each layer of molds 5. That is, after the grout is injected from the grouting channel 51, it flows downward from the position of each layer of mold 5 and fills each layer of mold 5 in sequence. Each mold 5 has an iron ring 52 on the upper side of the grouting channel 51. When the layer cutting system 6 is in contact with the iron ring 52, it is sealed, which facilitates the layer cutting system 6 to cut the grouting channel 51 into several layers.

[0026] The layered cutting system 6 includes a vacuum rigid tube 61, a vacuum reference block 62, a shrinkage air bladder 63, several ejection devices 64, several hydraulic power devices 65, and a sealing ring 66. Each ejection device 64 forms an arc shape inside the shrinkage air bladder 63. The ejection of each ejection device 64 causes the shrinkage air bladder 63 to expand. After the shrinkage air bladder 63 expands, the sealing ring 66 adapts to the iron ring 52 to achieve a seal. The vacuum rigid tube 61 is connected to the vacuum system 2 and extends into each layer mold 5 through the grouting channel 51.

[0027] During grouting, negative pressure is introduced into the vacuum rigid tube 61, causing the shrinkage airbag 63 to retract, the sealing ring 66 to disengage from the iron ring 52, and thus opening the grouting channel 51, allowing the grout to flow into each layer of mold 5. Each vacuum reference block 62 is installed on the outside of the vacuum rigid tube 61, and the shrinkage airbag 63 is installed on the outside of the vacuum reference block 62. The vacuum reference block 62 has an air passage 621 connecting the vacuum rigid tube 61 and the shrinkage airbag 63. Each ejection device 64 is equidistantly arranged around the circumference of the vacuum reference block 62 and is slidably installed inside the vacuum reference block 62. The hydraulic power unit 65 is at different heights within the grouting channel 51, resulting in varying pressures from the slurry. Generally, the lower the hydraulic power unit 65, the greater the sliding distance it travels towards the vacuum reference block 62 under the slurry pressure. This causes the hydraulic power unit 65 to push out the ejector device 64 to a greater extent, thereby sealing the grouting channel 51 at that location. In other words, during the pressurized grouting process of the grouting system 3, each mold 5 is sealed off from bottom to top, stopping the grouting process and ultimately ensuring that the grouting pressure of each mold 5 is consistent.

[0028] Each ejector device 64 is located inside the contraction air bladder 63. Each hydraulic power device 65 is slidably mounted on the vacuum reference block 62. Each hydraulic power device 65 is connected to the ejector device 64. Under the pressure of the mud, the hydraulic power device 65 slides inward to the inside of the vacuum reference block 62, thereby ejecting the corresponding ejector device 64, causing the contraction air bladder 63 to expand. A sealing ring 66 is installed on the outside of the contraction air bladder 63. The sealing ring 66 and the iron ring 52 are squeezed together to achieve a seal. Mud flows in from the upper side of the vacuum reference block 62 and flows under the sealing ring 66. After the grouting channel 51 is sealed, the hydraulic power unit 65 can still sense the slurry pressure on the upper side and react accordingly. Therefore, the telescopic end of the hydraulic power unit 65 is located on the upper side of the vacuum reference block 62. It is worth noting that the telescopic end of the hydraulic power unit 65 cannot be located on the lower side of the vacuum reference block 62. If it is located on the lower side, the hydraulic power unit 65 will lose its ability to sense the slurry pressure due to the gradual reduction of the gap between the sealing ring 66 and the iron ring 52, resulting in the inability to completely seal the gap between the sealing ring 66 and the iron ring 52.

[0029] Specifically, the pressure system 1 includes a pressure cylinder 11 and a lower pressure plate 12. The lower pressure plate 12 is installed at the output end of the pressure cylinder 11. The pressure cylinder 11 is installed on the pressure frame 4. The lower pressure plate 12 is used to press down each layer of mold 5 to prevent leakage of the grouting channel 51.

[0030] Specifically, the vacuum system 2 includes a vacuum pump and a vacuum tube. The vacuum pump is mounted on the pressure frame 4 and is connected to the vacuum tube. The vacuum tube is connected to the vacuum rigid tube 61 to control the retraction of the contraction airbag 63.

[0031] Specifically, the grouting system 3 includes a grouting pipe and a grouting pump. The grouting pump is connected to the grouting pipe, and the grouting pipe is connected to the grouting channel 51 to realize pressurized grouting.

[0032] Specifically, the inner side of the contraction airbag 63 is provided with several support plates 631 to prevent the contraction airbag 63 from collapsing under the pressure of mud and to maintain the general shape of the contraction airbag 63.

[0033] Specifically, the shrinkage airbag 63 is sleeved on the outside of the vacuum reference block 62. The shrinkage airbag 63 is installed on the vacuum reference block 62 by two annular pressure plates 67, which helps to prevent air leakage of the shrinkage airbag 63 when the slurry pressure changes.

[0034] Specifically, the side wall cross-section of the contraction airbag 63 is trapezoidal. The side of the contraction airbag 63 near the iron ring 52 is wider than the side of the contraction airbag 63 away from the iron ring 52, so that there is enough space to arrange multiple sealing rings 66. In this embodiment, there are two sealing rings 66 to achieve consistent slurry pressure in each layer of mold 5.

[0035] Specifically, the hydraulic power unit 65 includes a pressure plunger 651. The side of the pressure plunger 651 near the ejector device 64 is provided with an inclined surface 6511. The vacuum reference block 62 is provided with a blocking ring 622 to limit the extreme position of the pressure plunger 651 and prevent it from falling off. A sealing ring is provided between the pressure plunger 651 and the vacuum reference block 62. When the slurry pressure changes, the pressure plunger 651 slides in the vacuum reference block 62, pushing the ejector device 64 to extend, thereby making the sealing ring 66 fit with the iron ring 52 to complete the seal.

[0036] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A multi-layer continuous slip casting molding apparatus, characterized by, The system includes a pressure system, a vacuum system, a grouting system, a pressure frame, several layers of molds, and a layered cutting system. The pressure system is mounted on the pressure frame, and the molds are stacked on the pressure frame. The pressure system clamps the molds, and each mold forms a grouting channel that runs vertically through the grouting channel. Each mold has an iron ring on its upper side above the grouting channel. The layered cutting system includes a vacuum rigid tube, a vacuum reference block, a shrinkage air bladder, several ejection devices, several hydraulic power devices, and a sealing ring. Each ejection device forms an arc shape inside the shrinkage air bladder. The sealing ring is adapted to fit the iron ring. The vacuum rigid tube is connected to the vacuum system. A rigid vacuum tube extends into the grouting channel. Each of the vacuum reference blocks is installed on the outside of the rigid vacuum tube. The shrinkage airbag is installed on the outside of the vacuum reference block. The vacuum reference block has an air passage connecting the rigid vacuum tube and the shrinkage airbag. Each of the ejection devices is equidistantly arranged around the circumference of the vacuum reference block. Each of the ejection devices is slidably installed inside the vacuum reference block and located inside the shrinkage airbag. Each of the hydraulic power devices is slidably installed on the vacuum reference block and is connected to the ejection device. The sealing ring is installed on the outside of the shrinkage airbag. The telescopic end of the hydraulic power device is located on the upper side of the vacuum reference block.

2. The multi-layer continuous slip casting molding apparatus according to claim 1, wherein, The pressure system includes a pressure cylinder and a lower pressure plate. The lower pressure plate is installed at the output end of the pressure cylinder, and the pressure cylinder is installed on a pressure frame.

3. The multi-layer continuous grouting molding equipment according to claim 1, characterized in that, The vacuum system includes a vacuum pump and a vacuum tube. The vacuum pump is mounted on a pressure frame and is connected to the vacuum tube, which is connected to a rigid vacuum tube.

4. The multi-layer continuous grouting molding equipment according to claim 1, characterized in that, The grouting system includes a grouting pipe and a grouting pump. The grouting pump is connected to the grouting pipe, and the grouting pipe is connected to the grouting channel.

5. The multi-layer continuous grouting molding equipment according to claim 1, characterized in that, The inner side of the contraction airbag is provided with several support plates.

6. The multi-layer continuous grouting molding equipment according to claim 1, characterized in that, The contractile airbag is fitted over the vacuum reference block, and the contractile airbag is mounted on the vacuum reference block by two annular pressure plates.

7. The multi-layer continuous grouting molding equipment according to claim 1, characterized in that, The sidewall of the contraction airbag has a trapezoidal cross-section, and the side of the contraction airbag closer to the iron ring is wider than the side of the contraction airbag farther from the iron ring.

8. The multi-layer continuous grouting molding equipment according to claim 1, characterized in that, The hydraulic power unit includes a pressure plunger, and the side of the pressure plunger near the ejection device is provided with an inclined surface. The vacuum reference block is provided with a blocking ring to limit the extreme position of the pressure plunger.

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