High-temperature positioning plate for shell mold roasting
By combining mullite slabs with silicon carbide pins, the problems of short service life and structural instability of mullite slab positioning devices are solved, achieving precise positioning and long-term stable fixation of the shell mold, thus meeting the precise requirements of robot forklifts.
Patent Information
- Application Number
- CN202520353130.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-03-03
AI Technical Summary
Existing mullite slab positioning devices have short service life and unstable structure, resulting in insufficient positioning accuracy and making it impossible to achieve accurate positioning and long-term stable fixation of the shell mold.
The design combines mullite slabs with silicon carbide pins. By combining the first and second mullite positioning platforms with the fixing of silicon carbide pins, a high-temperature stable structure is formed, which enhances the connection strength and stability.
It achieves precise positioning of the shell mold, avoids displacement, ensures the accuracy of robot forking, and extends service life. The positioning accuracy is ±1mm, and it can be used stably for a long time at high temperatures.
Smart Images
Figure CN223960506U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of casting production equipment, specifically relating to a high-temperature positioning plate for shell mold baking. Background Technology
[0002] Currently, in the precision casting industry, shell molds are generally placed randomly inside the kiln. As long as the shell molds do not collide, they are fine. There is no fixed precision positioning, so high-temperature plates are rarely used. There are some cases in the industry where robots are used to fork shell molds inside the kiln. However, the shell molds are basically the same or similar shapes, and the shell molds are placed in fixed positions for forklifting. There is no positioning, and there are no high-temperature plates. Generally, to prevent the shell molds from tipping over, the high-temperature bricks of the kiln are stacked on top of each other to prevent the shell molds from tipping over. To adapt to robotic operations, current technologies use high-temperature resistant mullite slabs and positioning platforms for shell mold fixing and positioning. However, the mullite slab manufacturing process involves powder pressing and firing after mold making. Due to the pressing limitations, positioning blocks and plates can only be integrally molded to a maximum height of 50mm. Positioning plates exceeding 50mm in height suffer from quality issues, such as cracks and powder shedding, affecting positioning accuracy. The design of the positioning blocks also has specific requirements. Due to the processing requirements of mullite, the shape of the positioning blocks is limited to trapezoidal, square, or circular shapes for easy pressing. However, these shapes, after long-term rolling within the roasting furnace, can cause some misalignment between the shell mold and the positioning block, resulting in inaccurate positioning and hindering precise robot grasping. For solutions where the positioning blocks are taller than 50mm, previous methods involved fusing multiple positioning blocks with glue at high temperatures. This leads to glue delamination and block detachment during long-term high-temperature roasting, resulting in a shorter lifespan for the positioning blocks and a risk of them falling into the roasting furnace. Utility Model Content
[0003] To address the aforementioned technical problems, this utility model provides a high-temperature positioning plate for shell mold baking, which solves the problems of insufficient positioning accuracy caused by short service life and unstable structure in existing mullite slab positioning devices. This high-temperature positioning plate for shell mold baking has a high-temperature stable structure and a long service life, enabling precise positioning of the shell mold without displacement, thus ensuring the necessary requirement for precise positioning of the shell mold forklifted by the robot.
[0004] This utility model discloses a high-temperature positioning plate for shell mold firing, used for shell mold positioning and fixing. It includes a mullite plate, silicon carbide pins, and a first mullite positioning platform. A second mullite positioning platform is integrally formed on the mullite plate. The top surface of the second mullite positioning platform abuts against the bottom surface of the first mullite positioning platform. The combined shape of the first and second mullite positioning platforms is adapted to the shape of the inner cavity of the mold head of the shell mold. The bottom surface of the first mullite positioning platform has multiple first positioning grooves, and the top surface of the second mullite positioning platform has multiple second positioning grooves corresponding to the positions of the multiple first positioning grooves. Multiple silicon carbide pins are present, with the bottom ends of the pins inserted into the multiple second positioning grooves and the top ends inserted into the multiple first positioning grooves.
[0005] Furthermore, there are multiple first mullite positioning stages, and correspondingly, there are also multiple second mullite positioning stages.
[0006] Furthermore, the first mullite positioning stage includes a cylindrical portion and a conical portion, the conical portion being located below the cylindrical portion, and the outer diameter of the conical portion gradually increasing from top to bottom.
[0007] Furthermore, both the first mullite positioning platform and the second mullite positioning platform have multiple strip grooves extending from top to bottom on their outer walls.
[0008] Furthermore, the silicon carbide pin is cylindrical, and correspondingly, the first positioning groove and the second positioning groove are also cylindrical.
[0009] Furthermore, the height of the first mullite positioning stage is 65mm, and the height of the second mullite positioning stage is 20mm.
[0010] The high-temperature positioning plate for this shell mold firing is equipped with a first mullite positioning platform and a second mullite positioning platform. To address the issue of the limited height of the second mullite positioning platform, which is integrally formed with the mullite plate, a first mullite positioning platform is provided to combine and form a structure with sufficient limiting height. At the same time, to avoid high-temperature instability of the connection structure between the first and second mullite positioning platforms, multiple silicon carbide pins are provided for fixation. The silicon carbide pins themselves have good strength and high-temperature stability, which can enhance the connection strength between the first and second mullite positioning platforms on the one hand, and ensure the high-temperature stability of the connection on the other hand. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 A schematic diagram of a high-temperature positioning plate for shell mold firing;
[0013] Figure 2 This is an exploded view of a high-temperature positioning plate for shell mold baking. Detailed Implementation
[0014] This utility model discloses a high-temperature positioning plate for shell mold baking. The high-temperature positioning plate for shell mold baking has a high-temperature stable structure and a long service life, which enables the shell mold to be accurately positioned without displacement, thus ensuring the necessary requirement for accurate positioning of the shell mold for robot forklift.
[0015] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0016] See Figure 1 and Figure 2 As shown, this utility model discloses a high-temperature positioning plate for shell mold firing, used for shell mold positioning and fixing. It includes a mullite plate 1, silicon carbide pins 8, and a first mullite positioning platform 3. A second mullite positioning platform 2 is integrally formed on the mullite plate 1. The top surface of the second mullite positioning platform 2 abuts against the bottom surface of the first mullite positioning platform 3. The combined shape of the first mullite positioning platform 3 and the second mullite positioning platform 2 is adapted to the shape of the inner cavity of the mold head of the shell mold. The bottom surface of the first mullite positioning platform 3 is provided with a plurality of first positioning grooves. The top surface of the second mullite positioning platform 2 is provided with a plurality of second positioning grooves 7 corresponding to the positions of the plurality of first positioning grooves. There are a plurality of silicon carbide pins 8. The bottom ends of the plurality of silicon carbide pins 8 are inserted into the plurality of second positioning grooves 7 one by one, and the top ends of the plurality of silicon carbide pins 8 are inserted into the plurality of first positioning grooves one by one.
[0017] There are multiple first mullite positioning stages 3, and correspondingly, there are also multiple second mullite positioning stages 2.
[0018] The first mullite positioning stage 3 includes a cylindrical part 5 and a conical part 6. The conical part 6 is located below the cylindrical part 5, and the outer diameter of the conical part 6 gradually increases from top to bottom.
[0019] Both the first mullite positioning platform 3 and the second mullite positioning platform 2 have multiple strip grooves 4 extending from top to bottom on their outer walls.
[0020] The silicon carbide pin 8 is cylindrical, and correspondingly, the first positioning groove and the second positioning groove 7 are also cylindrical.
[0021] The height of the first mullite positioning stage 3 is 65mm, and the height of the second mullite positioning stage 2 is 20mm.
[0022] The high-temperature positioning plate for the shell mold firing is provided with a first mullite positioning platform 3 and a second mullite positioning platform 2. In order to address the problem of the limited height of the second mullite positioning platform 2, which is integrally formed with the mullite plate 1, the first mullite positioning platform 3 is provided to form a structure with sufficient limiting height. At the same time, in order to avoid the high-temperature instability of the connection structure between the first mullite positioning platform 3 and the second mullite positioning platform 2, the silicon carbide pin 8 itself has good strength and high-temperature stability. On the one hand, it can enhance the connection strength between the first mullite positioning platform 3 and the second mullite positioning platform 2, and on the other hand, it can also ensure the high-temperature stability of the connection.
[0023] This shell mold high-temperature calcination positioning plate solves the problem that the positioning platform on the mullite positioning plate cannot be higher than 50mm; the positioning plate with a positioning platform higher than 50mm has a lifespan of more than 1 year under long-term high temperature of 1200℃; it solves the problem of accurate positioning between the high-temperature positioning plate and the shell mold, with a positioning accuracy of ±1mm; the positioning platform and positioning plate can be used for a long time without cracking or separating under working conditions with large temperature differences (1200 to room temperature); it has good thermal performance.
[0024] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications or substitutions should be considered within the protection scope of the present invention.
Claims
1. A shell mold fired high temperature positioning plate, characterized by, The application discloses a shell mold positioning and fixing device, which comprises a mullite plate, a plurality of silicon carbide pins and a first mullite positioning table, wherein the mullite plate is integrally formed with a second mullite positioning table, the top surface of the second mullite positioning table is in abutment with the bottom surface of the first mullite positioning table, the combined shape of the first mullite positioning table and the second mullite positioning table is matched with the shape of the inner cavity of the die head of the shell mold, the bottom surface of the first mullite positioning table is provided with a plurality of first positioning grooves, the top surface of the second mullite positioning table is provided with a plurality of second positioning grooves corresponding to the positions of the first positioning grooves, and the plurality of silicon carbide pins are inserted into the second positioning grooves and the first positioning grooves one by one.
2. A shell mold sintering high-temperature positioning plate according to claim 1, characterized by, The number of the first mullite positioning tables is plural, and the number of the second mullite positioning tables is also plural.
3. The shell mold fired high temperature positioning plate of claim 1, wherein, The first mullite positioning table comprises a cylindrical part and a conical part, the conical part is located below the cylindrical part, and the outer diameter of the conical part gradually increases from top to bottom.
4. The shell mold fired high temperature positioning plate of claim 1, wherein, The outer walls of the first mullite positioning table and the second mullite positioning table are both provided with a plurality of strip-shaped grooves extending from top to bottom.
5. The shell mold fired high temperature positioning plate of claim 1, wherein, The silicon carbide pins are cylindrical, and the shapes of the first positioning grooves and the second positioning grooves are also cylindrical.
6. The shell mold fired high temperature positioning plate of claim 1, wherein, The height of the first mullite positioning table is 65 mm, and the height of the second mullite positioning table is 20 mm.