Pouring gate wax mold structure for volute atmosphere construction
By using a frustum-shaped base and an 'O'-shaped support structure, the problems of wax mold tilting and uneven pouring in vortex castings were solved, achieving stable production and cost reduction of vortex castings.
Patent Information
- Application Number
- CN202423244534.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-27
AI Technical Summary
The wax pattern of the vortex shell casting is prone to tipping over during the production process, resulting in missing material at the edges, uneven pouring, low pass rate, and high cost.
The structure employs a frustum-shaped base and an 'O'-shaped support to increase the stability of the wax model's bottom. It connects to the vortex casting wax model through multiple connecting columns and fixing points, providing multiple channels to ensure uniform distribution of molten steel. Combined with an 'I'-shaped nut, it facilitates operation.
It improves the stability and casting efficiency of wax molds, ensures uniform distribution of molten steel, increases the pass rate and yield of vortex castings, and reduces costs.
Smart Images
Figure CN223655974U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts processing technology, specifically to a sprue wax mold structure for atmospheric construction of a vortex shell. Background Technology
[0002] Utility model patent No. 2022231249701 discloses a wax pattern structure for vacuum casting. It uses an I-shaped nut as a connector. The concave portion in the middle and the grooves on the top and bottom surfaces allow the wax to fully contact the I-shaped nut during casting, and after the wax hardens, it integrates with the nut. The hook connected to the bottom of the I-shaped nut facilitates subsequent shell-making operations such as slurry impregnation, sanding, and drying. Furthermore, the I-shaped nut and bottom cover allow for removal of the I-shaped nut during dewaxing, creating an outlet for the melted wax. Simultaneously, during casting, the shell can be inverted, allowing the wax outlet to serve as an inlet for molten steel. With the casting shell at the bottom, molten steel can fill all the cavities of the casting shell, facilitating casting formation.
[0003] Furthermore, to produce the vortex shell component, a rod-and-column type wax model structure was designed, with its top connected to the vortex shell casting wax model via a connecting column. Due to the large volume of the vortex shell casting wax model, its upper part is quite heavy, making it prone to tipping over and damaging the edges of the vortex shell. Simultaneously, each vortex shell casting wax model is connected to the rod-and-column only by one connecting column, which prevents the molten steel from rising and flowing back during the later pouring process. This results in insufficient injection pressure to reach the edges of the vortex shell casting, leading to missing edges and insufficient material in the poured vortex shell casting. Consequently, the number of successful vortex shell castings is reduced, the number of scrapped vortex shell castings is increased, and the pass rate is lowered.
[0004] Later, during the modification process, a flat wax pattern structure emerged, fixing the volute casting wax pattern to both sides of the flat wax pattern structure. However, the volute casting wax patterns on both sides required a longer drying time after the subsequent slurry impregnation and sanding processes. Furthermore, it frequently resulted in the parts of the wax pattern farther from the flat wax pattern structure achieving the required dryness, while the parts closer to the flat wax pattern structure failed to meet the drying standards. Additionally, the flat wax pattern structure had a lower yield, leading to higher costs for the volute castings. Utility Model Content
[0005] To address the aforementioned technical problems, this technical solution provides a gating wax model structure for atmospheric construction of vortex shells. The frustum-shaped base increases the weight and stability of the bottom of the vortex shell wax model, ensuring it sits stably on a flat surface without tipping over. The "O"-shaped support, with a hollow center, works in conjunction with the vortex shell casting wax model, which is fixed to the left and right sides of the hollow center. This enhances ventilation during the drying process after slurry impregnation and sand application, allowing the vortex shell casting to dry faster and more thoroughly. The hollow center of the "O"-shaped support also reduces the weight and material usage of the gating system, increases yield, reduces rework metal, and lowers costs. This effectively solves the aforementioned problems.
[0006] This utility model is achieved through the following technical solution:
[0007] A wax model structure for a gating system used in atmospheric construction of a vortex shell includes a base, with an I-shaped nut embedded and fixedly connected to the bottom of the base, and a support seat at the top of the base for connecting to multiple vortex shell casting wax models. The base is a frustum-shaped structure, and the top support seat is an O-shaped support seat. The vortex shell casting wax models are fixed to the left and right sides of the O-shaped support seat via connecting columns. After the vortex shell casting wax models are fixed, their fixed positions correspond to the hollow part in the middle of the O-shaped support seat. An arc-shaped transition structure is provided at the connection between the frustum-shaped base and the O-shaped support seat. The central axes of the O-shaped support seat, the arc-shaped transition structure, the frustum-shaped base, and the I-shaped nut are on a straight line.
[0008] Furthermore, the diameter of the top of the frustum-shaped base is less than or equal to the radius of the bottom of the frustum-shaped base; the arc-shaped transition structure extends from the top of the frustum-shaped base to the side of the bottom of the "O"-shaped support, forming an "O"-shaped support embedded in the top of the frustum-shaped base; and the "O"-shaped support, the arc-shaped transition structure and the frustum-shaped base are integrally formed.
[0009] Furthermore, multiple fixing points connected to the connecting columns are provided on the left and right sides of the “O”-shaped support base, and the multiple connecting columns on the vortex shell casting wax mold are respectively fixed to the fixing points.
[0010] Furthermore, the fixing points are respectively set at the upper, lower, front, and back positions on the left and right sides of the "O"-shaped support base.
[0011] Furthermore, a vibrating shell machine positioning point is provided at the center of the top surface of the "O"-shaped support; and a cutting machine clamp positioning point is provided on the side walls on the front and rear sides of the "O"-shaped support.
[0012] Furthermore, the "I"-shaped nut has an internal thread in the middle, and the "I"-shaped nut is detachably and fixedly connected to an external component through the internal thread. The external component includes a lead screw connected to the "I"-shaped nut through a thread, and a bottom cover and a fastening nut are fixedly connected to the lead screw through a thread.
[0013] Furthermore, a hook is provided at the bottom of the lead screw.
[0014] Furthermore, the top and / or bottom surfaces of the I-shaped nut are provided with multiple grooves, and the outer wall of the middle part of the I-shaped nut is provided with a groove. Beneficial effects
[0015] The wax model structure for the gating system of the atmospheric construction of a vortex shell proposed in this utility model has the following advantages compared with the prior art:
[0016] This technical solution, through the design of a frustum-shaped base, increases the weight of the bottom of the volute shell resin wax model, enhancing its stability and ensuring it sits stably on a flat surface without tipping over. The "O"-shaped support, with a hollow center, combined with the wax model of the volute shell casting fixed to either side of the hollow center, improves ventilation during the drying process after slurry impregnation and sand application. This results in a more uniform, faster, and more thorough drying of the shell formed in the volute shell casting. Furthermore, the hollow center of the "O"-shaped support reduces the weight and material usage of the gating system, increasing yield, reducing rework metal, and lowering costs.
[0017] This technical solution utilizes multiple fixed points connected to the vortex shell casting wax model via multiple connecting columns. These columns create multiple channels during the later pouring process, extending from the support base to the vortex shell casting. This ensures that the injected pressure reaches the edge of the vortex shell casting membrane during pouring, guaranteeing the rise and backflow of molten steel. Positioning the fixed points on the left and right sides of the "O"-shaped support base at various locations (up, down, front, and back) allows for faster and more even distribution of molten steel within the vortex shell casting membrane, effectively increasing the number of successful vortex shell castings and improving the yield rate.
[0018] In this technical solution, the positioning points of the vibrating shell machine are matched with the positioning points on the subsequent shell removal equipment, which facilitates the vibrating shell and breaking operations of the casting; the positioning points of the cutting machine fixture are matched with the positioning points on the subsequent cutting machine, which facilitates the subsequent cutting operation; the setting of three positioning points can reduce the installation time of the casting and further increase production efficiency.
[0019] In this technical solution, the I-shaped nut serves as a connector. Its central recess and the grooves on its top and bottom surfaces allow the wax to fully contact the I-shaped nut during wax casting, and after the wax hardens, it integrates seamlessly with the nut. The hook connected to the bottom of the I-shaped nut facilitates subsequent shell-making processes such as slurry impregnation, sanding, drying, and sintering. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0021] Figure 2 This is a structural diagram of the present invention, which is fixed with the wax model of the vortex casting to form a tree-shaped wax model.
[0022] The markings in the attached diagram are: 1-base, 2-support seat, 21-fixed point, 22-vibrating shell machine positioning point, 23-cutting machine fixture positioning point, 3-arc transition structure, 4-connecting column, 5-volute casting wax model, 6-bottom cover, 7-hook. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Various modifications and improvements to the technical solutions of the present utility model made by those skilled in the art without departing from the design concept of the present utility model should fall within the protection scope of the present utility model. Example
[0024] like Figures 1 to 2 As shown, a sprue wax model structure for atmospheric construction of vortex shells includes a base 1, with an I-shaped nut embedded and fixedly connected to the bottom of the base 1, and a support seat 2 provided on the top of the base 1 for connecting to multiple vortex shell casting wax models 5.
[0025] The base 1 is a frustum-shaped structure, with the diameter of the top of the frustum-shaped base being less than or equal to the radius of the bottom of the frustum-shaped base; the bottom diameter, top diameter, and height of the frustum-shaped base are in a certain proportion to make the frustum-shaped base more stable.
[0026] The support 2 at the top of the frustum-shaped base is an "O"-shaped support. Four fixing points 21, connecting to the connecting column 4, are respectively provided on the left and right sides of the "O"-shaped support. Figure 1 As shown, fixing points 21 are respectively set at the upper, lower, front, and back positions on the left and right sides of the "O"-shaped support base; the vortex shell casting wax model 5 is welded and fixed to fixing points 21 by four connecting columns 4. A vibrating shell machine positioning point 22 is set at the center of the top surface of the "O"-shaped support base; a cutting machine fixture positioning point 23 is set on the side walls on the front and back sides of the "O"-shaped support base.
[0027] As Figure 2 shown, the volute casting wax mold 5 is fixed on the left and right sides of the "O"-shaped support seat through the connecting column 4; after the volute casting wax mold 5 is fixed, the fixed position corresponds to the hollow part in the middle of the "O"-shaped support seat.
[0028] The junction of the circular truncated cone-shaped base and the "O"-shaped support seat is provided with an arc-shaped transition structure 3; as Figure 1 shown, the arc-shaped transition structure 3 extends from the top of the circular truncated cone-shaped base to the side surface of the bottom of the "O"-shaped support seat, forming a state that the "O"-shaped support seat is embedded on the top of the circular truncated cone-shaped base; and the "O"-shaped support seat, the arc-shaped transition structure 3 and the circular truncated cone-shaped base are integrally formed.
[0029] The middle part of the "H"-shaped nut is provided with an internal thread, and the "H"-shaped nut is detachably fixedly connected with an external component through the internal thread, the external component including a lead screw connected with the "H"-shaped nut through a thread, and a bottom cover 6 and a fastening nut fixedly connected on the lead screw through a thread. The bottom of the lead screw is provided with a hook 7. The top surface and / or the bottom surface of the "H"-shaped nut is provided with a plurality of grooves, and the outer wall of the middle part of the "H"-shaped nut is provided with a groove. Since this part is consistent with the "H"-shaped nut structure disclosed in the utility model patent with the patent number 2022231249701, the present utility model only applies it regularly, and therefore this part of content is not shown in the drawings.
[0030] The central axes of the "O"-shaped support seat, the arc-shaped transition structure 3, the circular truncated cone-shaped base and the "H"-shaped nut are on a straight line.
Claims
1. A wax model structure for a gating system used in atmospheric construction of a vortex shell, comprising a base (1), wherein an I-shaped nut is embedded and fixedly connected to the bottom of the base (1), and a support seat (2) is provided on the top of the base (1) for connecting to multiple wax models (5) of vortex shell castings; characterized in that: The base (1) is a circular truncated cone structure, the support seat (2) at the top is an "O" type support seat, the volute casting wax mold (5) is fixed on the left and right sides of the "O" type support seat (2) through the connecting column (4); after the volute casting wax mold (5) is fixed, the fixed position corresponds to the hollow part in the middle of the "O" type support seat (2); the junction of the circular truncated cone base (1) and the "O" type support seat (2) is provided with an arc transition structure (3); the "O" type support seat (2), the arc transition structure (3), the circular truncated cone base (1) and the middle axis of the "H" type nut are on a straight line.
2. A runner wax pattern structure for vortex shell atmospheric construction according to claim 1, characterized in that: The diameter of the top of the circular truncated cone base (1) is less than or equal to the radius of the bottom of the circular truncated cone base (1); the arc transition structure (3) extends from the top of the circular truncated cone base (1) to the side surface of the bottom of the "O" type support seat (2), forming a state that the "O" type support seat (2) is embedded in the top of the circular truncated cone base (1); and the "O" type support seat (2), the arc transition structure (3) and the circular truncated cone base (1) are integrally formed.
3. A runner wax pattern structure for vortex shell atmospheric construction according to claim 1, characterized in that: The "O" type support seat (2) is provided with a plurality of fixed points (21) connected with the connecting column (4) on the side surface of the left and right sides, and the volute casting wax mold (5) is fixed with the fixed points (21) through a plurality of connecting columns (4) respectively.
4. A runner wax pattern structure for vortex shell atmospheric construction according to claim 3, characterized in that: The fixed points (21) are respectively arranged on the upper, lower, front and rear positions of the side surfaces of the left and right sides of the "O" type support seat (2).
5. A runner wax pattern structure for vortex shell atmospheric construction according to claim 1, wherein: The "O" type support seat (2) is provided with a volute shell machine positioning point (22) at the center of the top surface; the cutting machine clamp positioning point (23) is arranged on the side wall of the front and rear sides of the "O" type support seat (2).
6. A runner wax pattern structure for vortex shell atmospheric construction according to claim 1, characterized in that: The middle part of the "H" type nut is provided with an internal thread, and the "H" type nut is detachably fixedly connected with an external component through the internal thread, the external component comprising a lead screw connected with the "H" type nut through a thread, and a bottom cover (6) and a fastening nut fixedly connected with the lead screw through a thread.
7. A runner wax pattern structure for vortex shell atmospheric construction according to claim 6, characterized in that: The bottom of the lead screw is provided with a hook (7).
8. A runner wax pattern structure for vortex shell atmospheric construction according to claim 1 or 6 or 7, characterized in that: The top surface and / or the bottom surface of the "H" type nut is provided with a plurality of grooves, and the outer wall of the middle part of the "H" type nut is provided with a groove.