Energy-saving type recyclable sand-coated iron core rod mold
By using sand-packed iron core stick mold and synchronous sand injection design in the coated sand mold, the problems of air holes, shrinkage holes and large amounts of sand are solved in the casting of shaft shell parts, and high-quality and low-cost casting effect is achieved.
Patent Information
- Application Number
- CN202421795862.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-29
AI Technical Summary
Existing coated sand molds are prone to air holes and shrinkage when casting shaft shell parts, and use a lot of sand and are costly.
The energy-saving and circulating sand-pack iron core stick mold is adopted. Through the upper and lower symmetrical sand box structure and sand injection port design, the synchronization of sand injection between two rows of sand boxes is achieved, and the sand-pack iron core stick process is used to reduce the amount of sand used.
It effectively avoids product pores and shrinkage, improves product quality, reduces the amount of sand used, and the iron core stick can be reused and has a high comprehensive utilization rate.
Smart Images
Figure CN223011825U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of coated sand molds, and particularly relates to an energy-saving and recyclable sand-coated iron core rod mold. Background Technique
[0002] The sand casting process is a casting method that uses sand as the main molding material to prepare the mold. Due to the characteristics of sand casting itself, it is not restricted by the shape, size, complexity of parts and the type of alloy, and has a short production cycle and low cost. Therefore, sand casting is still the most widely used casting method in casting production. Coated sand casting is a type of sand casting. Using coated sand to produce coated sand castings is a casting method with relatively low energy consumption, especially the recycling of waste sand. The coated sand casting process uses a mold to perform high-pressure molding on the sand mold. After the coated sand is baked at high temperature and high pressure by the mold, it quickly forms, and there is an iron water flow channel in the sand mold, and the shape of the flow channel is the shape of the casting; in the casting workshop, the sand core is placed in a designated box, and high-temperature iron water is poured from the pouring gate, which can make the resin of the sand core slowly volatilize. After cooling, the sand core becomes loose sand, and the corresponding casting is obtained.
[0003] At present, for shaft shell parts, if the sand shell produced by using the corresponding coated sand mold is used for casting, the products are prone to porosity and shrinkage cavities, and the coated sand mold uses a lot of sand, resulting in high costs. Summary of the Utility Model
[0004] Aiming at the technical problems existing in the above-mentioned coated sand mold, the utility model provides an energy-saving and recyclable sand-coated iron core rod mold, which can effectively avoid product porosity and shrinkage cavities, ensure product quality, reduce the amount of sand used, and the iron rod can be reused, with a relatively high comprehensive utilization rate.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is that an energy-saving and recyclable sand-coated iron core rod mold provided by the utility model includes an upper sand box and a lower sand box. The upper sand box and the lower sand box are symmetrically arranged up and down. The upper sand box and the lower sand box are both provided with mold positioning holes. Both the left and right sides of the lower sand box are provided with sand injection ports, which are respectively a left sand injection port and a right sand injection port. The inside of the lower sand box is provided with a plurality of sand cavities and is divided into a left row of sand cavities and a right row of sand cavities. The left row of sand cavities is communicated with the left sand injection port, and the right row of sand cavities is communicated with the right sand injection port. The sand cavity is provided with a pouring process structure at a position close to the sand injection port communicated with it, and a support shoulder is provided at a position far from the sand injection port communicated with it. The diameter of the support shoulder is smaller than the diameter of the sand cavity, and an iron core rod for supporting cooperation with the two is provided on the support surface of the support shoulder and the top of the pouring process structure.
[0006] Preferably, the left sand discharging cavity and the right sand discharging cavity together include four sand cavities with different specifications. Every two sand cavities are arranged in the same row. The number of both the left sand shooting port and the right sand shooting port is two, and both are in a strip structure. Each sand shooting port corresponds to each group of sand cavities.
[0007] Preferably, a diversion shoulder is arranged between the ends of adjacent sand cavities, and the diversion shoulder is arranged on the sand shooting port.
[0008] Preferably, a die matrix is arranged on the inner wall of the sand cavity.
[0009] Preferably, the die positioning holes are arranged diagonally on the upper sand box and the lower sand box.
[0010] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:
[0011] 1. The energy-saving recyclable sand-coated iron core rod die provided by the present utility model can shoot sand into the left sand discharging cavity and the right sand discharging cavity respectively by using the left sand shooting port and the right sand shooting port, so as to ensure the synchronism of sand shooting of the two rows of sand boxes, improve the production efficiency of the sand shell. Moreover, each sand shell adopts the sand-coated iron core rod process, which can effectively avoid product air holes and shrinkage holes, ensure the product quality, reduce the sand consumption, and its iron rod can be reused, with a relatively high comprehensive utilization rate, being suitable for large-scale popularization. Description of the Drawings
[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the description of the embodiments. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.
[0013] Figure 1 It is the working drawing of the lower sand box and the iron core rod provided for the embodiment;
[0014] Figure 2 It is the side view of an energy-saving recyclable sand-coated iron core rod die provided for the embodiment;
[0015] Figure 3 It is the cross-sectional view of an energy-saving recyclable sand-coated iron core rod die provided for the embodiment in the D-D direction;
[0016] In the above drawings, 1. upper sand box; 2. lower sand box; 3. die positioning hole; 4. sand shooting port; 41. left sand shooting port; 42. right sand shooting port; 5. sand cavity; 51. left sand discharging cavity; 52. right sand discharging cavity; 6. pouring process structure; 7. support shoulder; 8. iron core rod; 9. diversion shoulder; 10. die matrix. Detailed Embodiments
[0017] In order to more clearly understand the above-mentioned objects, features, and advantages of the present utility model, the following further describes the present utility model in conjunction with the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. For the convenience of narration, words such as "upper", "lower", "left", and "right" hereinafter only indicate the same directions as the upper, lower, left, and right directions of the accompanying drawings themselves, and do not limit the structure.
[0018] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.
[0019] Embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, an energy-saving and recyclable sand-bag core rod mold provided by the present utility model includes an upper sand box 1 and a lower sand box 2. The upper sand box 1 and the lower sand box 2 are symmetrically structured up and down. Both the upper sand box 1 and the lower sand box 2 are provided with mold positioning holes 3. Both the left and right sides of the lower sand box 2 are provided with sand injection ports 4, which are respectively a left sand injection port 41 and a right sand injection port 42. The inside of the lower sand box 2 is provided with a plurality of sand cavities 5, which are divided into a left row of sand cavities 51 and a right row of sand cavities 52. The left row of sand cavities 51 communicates with the left sand injection port 41, and the right row of sand cavities 52 communicates with the right sand injection port 42. The sand cavity 5 is provided with a casting process structure at a position close to the sand injection port 4 with which it communicates, and a support shoulder 7 is provided at a position far from the sand injection port 4 with which it communicates. The diameter of the support shoulder 7 is smaller than the diameter of the sand cavity 5. A core rod 8 that supports and cooperates with both of them is provided on the support surface of the support shoulder 7 and the top of the casting process structure.
[0020] Specifically, the parting surface after the upper sand box 1 and the lower sand box 2 are butted can separate each sand cavity 5, especially the left row of sand cavities 51 and the right row of sand cavities 52. And the core shooter can inject sand into the left row of sand cavities 51 and the right row of sand cavities 52 respectively by using the left sand injection port 41 and the right sand injection port 42 to ensure the synchronism of sand injection in the two rows of sand boxes and improve the production efficiency of the sand shell. Further, each sand shell adopts the sand-bag core rod 8 process. On the one hand, the compactness and density of the sand shell produced by the core shooter injecting sand are improved to a certain extent, which can effectively avoid product pores and shrinkage phenomena and ensure product quality. On the other hand, the sand-bag core rod 8 process effectively reduces the sand consumption, and its iron rod can be reused, with a relatively high comprehensive utilization rate.
[0021] In order to improve the utilization rate of this mold, the left sand discharge cavity 51 and the right sand discharge cavity 52 provided by the present utility model altogether include four groups of sand cavities 5 with different specifications. Every two groups of sand cavities 5 are arranged in the same row. The number of both the left sand injection port 41 and the right sand injection port 42 is two and both are in a long strip structure. Each sand injection port 4 corresponds to each group of sand cavities 5. Correspondingly, the diameter of the iron core rod 8 is arranged and disposed according to different sand cavities 5. In this way, the core shooter can simultaneously produce four sand shells with different specifications and models during one sand injection operation, and thus can meet the requirements for producing different products.
[0022] In order to improve the quality of the sand shell, considering that one sand injection port 4 corresponds to multiple sand cavities 5, the present utility model is provided with a diversion shoulder 9 between the ends of adjacent sand cavities 5. The diversion shoulder 9 is arranged on the sand injection port 4. The diversion shoulder 9 can promote the filling of sand into the sand cavity 5 instantaneously during sand injection, and at the end of the sand injection operation, it will not cause excessive connection between adjacent sand shells, thus facilitating the independent separation of the sand shells from the sand box for subsequent casting operations.
[0023] In order to facilitate the overall management of different sand shells, the present utility model is provided with a letter mold 10 on the inner wall of the sand cavity 5. The sand shell produced by sand injection will directly imprint the corresponding numbers at the position of the letter mold 10.
[0024] Furthermore, the mold positioning holes 3 provided by the present utility model are arranged diagonally on the upper sand box 1 and the lower sand box 2. Only one pair of mold positioning holes 3 distributed diagonally is required, and they have reasonable horizontal and vertical spans on the parting surface, which can ensure the docking quality of the sand boxes.
[0025] The above are only the preferred embodiments of the present utility model, and are not limitations to the present utility model in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.
Claims
1. An energy-saving and recyclable sand bag iron core stick mold, comprising an upper sand box and a lower sand box, wherein the upper sand box and the lower sand box are symmetrical in structure, characterized in that: The upper sand box and the lower sand box are both provided with mold positioning holes, and the left and right sides of the lower sand box are both provided with sand shooting ports, which are respectively a left sand shooting port and a right sand shooting port. The interior of the lower sand box is provided with multiple sand cavities, which are divided into a left sand discharge cavity and a right sand discharge cavity. The left sand discharge cavity is communicated with the left sand shooting port, and the right sand discharge cavity is communicated with the right sand shooting port. The sand cavity is provided with a casting process structure at a position close to the sand shooting port communicated with it, and the sand cavity is provided with a supporting shoulder at a position away from the sand shooting port communicated with it, and the caliber of the supporting shoulder is smaller than the caliber of the sand cavity, and the supporting surface of the supporting shoulder and the top of the casting process structure are provided with an iron core rod that supports and cooperates with the two.
2. The energy-saving and recyclable sand bag iron core stick mold according to claim 1, characterized in that: The left sand row chamber and the right sand row chamber include four groups of sand chambers with different specifications, and every two groups of sand chambers are arranged in the same row. The number of the left sand shooting ports and the right sand shooting ports are both two and both are in a long strip structure, and each sand shooting port corresponds to each group of sand chambers.
3. The energy-saving and recyclable sand bag iron core stick mold according to claim 2 is characterized in that: A guide shoulder is arranged between the ends of adjacent sand cavities, and the guide shoulder is arranged on the sand shooting port.
4. The energy-saving and recyclable sand bag iron core stick mold according to claim 3 is characterized in that: A character mold is arranged on the inner wall of the sand cavity.
5. The energy-saving and recyclable sand bag iron core stick mold according to claim 4, characterized in that: The mold positioning holes are diagonally arranged on the upper sand box and the lower sand box.