Apparatus and method for reducing weld marks in alumina ceramic crucibles

Abstract

The application provides a device for reducing welding marks in an alumina ceramic crucible, which comprises a cylindrical outer mold with a hollow structure, an inner mold arranged on the inner side of the outer mold, a cylindrical closed forming cavity arranged between the inner mold and the outer mold, a base jointed to the bottom of the outer mold, two second grouting openings in a parallelogram shape and in opposite directions arranged in the middle of the base, a feeding disc connected to the lower part of the base, and a first grouting opening arranged in the center of the feeding disc. The application also provides a method for reducing welding marks in an alumina ceramic crucible, which comprises the following steps: assembling the outer mold, the inner mold, a mold core ring, the base and the feeding disc; placing the mold into water with a temperature of 24-26 DEG C; injecting alumina ceramic grouting liquid into the mold from the first grouting opening to form; and demolding. The application can reduce welding marks in an alumina ceramic crucible and improve the quality of finished products.

Description

Technical Field

[0001] This invention relates to an apparatus and method for reducing weld lines in alumina ceramic crucibles. Background Technology

[0002] Currently, the manufacturing process of alumina ceramic crucibles requires the use of molds. These molds have specific contours and molding cavities to allow the injected slurry to be molded. However, existing alumina ceramic crucible molds use trapezoidal injection ports. The slurry flows through the molding cavity through the two ports in a diffused pattern, preventing proper fusion. This results in weld lines, or weld marks, on the finished product. Weld lines occur when molten plastic encounters insert holes, areas of discontinuous flow, or interruptions in the mold flow within the molding cavity, causing multiple streams to converge. These weld lines not only affect the appearance of the plastic part but also influence its mechanical properties, such as impact strength, tensile strength, and elongation at break. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an apparatus and method for reducing weld lines in alumina ceramic crucibles, thereby reducing weld lines and improving the quality of finished products.

[0004] To solve the above technical problems, the technical solution of the present invention is as follows:

[0005] A device for reducing weld lines in alumina ceramic crucibles is characterized by comprising a cylindrical outer mold with a hollow internal structure, an inner mold disposed inside the outer mold, a cylindrical closed forming cavity between the inner mold and the outer mold, a base snapped onto the bottom of the outer mold, two second grouting ports with parallelogram-shaped cross-sections and opposite directions disposed in the middle of the base, a feed plate connected to the lower part of the base, and a first grouting port disposed at the center of the feed plate.

[0006] By adopting the above technical solution, the slurry inlet in the alumina ceramic crucible mold is set as a parallelogram. When the slurry enters the molding cavity, there is a rotational force, which makes the slurry more coherent and enables the two slurries to fuse better.

[0007] Preferably, a threaded hole is provided at the center of the end of the inner mold away from the base.

[0008] Preferably, a core ring is provided at the connection between the top of the outer mold and the inner mold.

[0009] By adopting the above technical solution, during demolding, the demolding device is connected to the threaded hole, and its side abuts against the mold core ring to demold the inner mold.

[0010] Preferably, a buffer groove is provided at the connection between the feed tray and the base, and the buffer groove is connected to the first grouting port and the second grouting port.

[0011] By adopting the above technical solution, the grouting fluid can be buffered and can fully enter the molding tank.

[0012] On the other hand, the present invention provides a method for reducing weld lines in alumina ceramic crucibles, characterized by comprising the following steps:

[0013] 1) Assemble the outer mold, inner mold, mold core ring, base, and feed tray;

[0014] 2) Place the mold in water at a temperature of 24-26℃;

[0015] 3) Inject the alumina ceramic grout into the mold through the first grouting port to form the shape;

[0016] 4) Demolding.

[0017] By adopting the above technical solution and controlling the water temperature, the cooling rate of the slurry after entering the molding cavity is slowed down, so that the slurry maintains strong mobility, can be well integrated, is not prone to delamination, and is not prone to weld lines.

[0018] In summary, the present invention has the following beneficial technical effects:

[0019] 1. This invention provides a device and method for reducing weld lines in alumina ceramic crucibles. By setting two parallelogram-shaped grouting ports in opposite directions, the grout flows in the same direction, allowing the two grouts to fuse well. This prevents the formation of discontinuous areas in the grout flow, ensuring complete fusion of the grouts without seams, resulting in high-quality finished products and enhanced surface smoothness.

[0020] 2. The present invention provides a device and method for reducing weld lines in alumina ceramic crucibles. By controlling the water temperature, the cooling rate of the slurry after entering the molding cavity is slowed down, so that the slurry maintains strong mobility, can be well fused, is not prone to delamination, and is less likely to produce weld lines. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some specific embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional view of the device for reducing weld lines in alumina ceramic crucibles according to the present invention.

[0023] Figure 2 This is a top view of the chassis of the present invention;

[0024] Figure 3 for Figure 2 Sectional view along line AA;

[0025] Figure 4 for Figure 2 Sectional view along line BB.

[0026] Explanation of reference numerals in the attached drawings: 1. Outer mold; 2. Mold core ring; 3. Inner mold; 4. Second injection port; 5. Feed tray; 6. Base; 7. First injection port; 8. Molding cavity. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that terms such as "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] This invention discloses a device for reducing weld lines in alumina ceramic crucibles.

[0030] like Figure 1-4 As shown, a device for reducing weld lines in alumina ceramic crucibles includes a cylindrical outer mold with a hollow internal structure, an inner mold inside the outer mold, a closed cylindrical forming cavity between the inner and outer molds, a threaded hole at the center of the end of the inner mold away from the base, a base snapped onto the bottom of the outer mold, two parallelogram-shaped second injection ports in opposite directions in the middle of the base, a feed pan connected to the lower part of the base, and a first injection port at the center of the feed pan. A mold core ring is provided at the connection between the top of the outer mold and the inner mold; a buffer groove is provided at the connection between the feed pan and the base, and the buffer groove communicates with the first and second injection ports.

[0031] By setting two parallelogram-shaped grouting ports, the grout flows in the same direction, allowing the two streams of grout to blend well. This prevents the formation of discontinuous grout flow areas, ensuring complete grout fusion without seams, resulting in high-quality finished products and enhanced surface smoothness.

[0032] This application also discloses a method for reducing weld lines in alumina ceramic crucibles, comprising the following steps:

[0033] 1) Assemble the outer mold, inner mold, mold core ring, base, and feed tray;

[0034] 2) Place the mold in water at a temperature of 24-26℃;

[0035] 3) Inject the alumina ceramic grout into the mold through the first grouting port to form the shape;

[0036] 4) Demolding.

[0037] By controlling the water temperature, the cooling rate of the slurry after entering the molding cavity is slowed down, allowing the slurry to maintain strong fluidity, enabling it to blend well, preventing delamination, and reducing the likelihood of weld lines.

[0038] The above are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for reducing weld lines in alumina ceramic crucibles, characterized in that, Includes the following steps: 1) Assemble the outer mold, inner mold, mold core ring, base, and feed tray; 2) Place the mold in water at a temperature of 24-26℃; 3) Inject the alumina ceramic grout into the mold through the first grouting port to form the shape; 4) Demolding; A device for reducing weld lines in alumina ceramic crucibles includes a cylindrical outer mold with a hollow internal structure, an inner mold disposed inside the outer mold, a cylindrical closed forming cavity between the inner mold and the outer mold, a base snapped onto the bottom of the outer mold, two second grouting ports with parallelogram cross-sections in opposite directions in the middle of the base, a feed plate connected to the lower part of the base, and a first grouting port disposed at the center of the feed plate; A mold core ring is provided at the connection between the top of the outer mold and the inner mold; A buffer groove is provided between the feed tray and the base, and the buffer groove is connected to the first grouting port and the second grouting port; By setting two parallelogram-shaped grouting ports, the grouting fluid flows in the same direction.

2. The method for reducing weld lines in an alumina ceramic crucible according to claim 1, characterized in that, A threaded hole is provided at the center of the end of the inner mold away from the base.

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