Precoated sand hot core box mold
By using the material removal system of coated sand hot core box mold in the production process of 10-inch connecting seats, the surface quality problems such as more meat or less meat are solved, high-quality casting production is achieved, and the scrap rate is reduced.
Patent Information
- Application Number
- CN202420969043.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-05-07
AI Technical Summary
In the production process of the existing 10-inch connecting seat, the product often has more meat or less meat, and there are local shrinkage holes. The product surface quality is low, resulting in a high waste rate.
The coated sand hot core box mold is used. By setting up a material retraction plate and a material retraction rod on one side of the core box body, the material retraction plate is driven to move when the mold is closed and the material retraction spring is compressed to achieve automatic mold release of the model and reduce the impact on the model.
The quality of the castings is improved, the scrap rate is significantly reduced, the problem of poor defects in the casting process is solved, the yield rate is improved, and the quality of the 10-inch connecting seat is ensured.
Smart Images
Figure CN222931779U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hot core box molds, and particularly relates to a coated sand hot core box mold. Background Art
[0002] The 10-inch connecting seat is an important part of the braking system of 160-kilometer EMUs. EMUs are new types of trains, and strict quality requirements are imposed on products to ensure safe operation. It is required that braking products must ensure absolute reliability of quality, and an important factor determining quality is the production process method used during production. Currently, products manufactured using the process for the 10-inch connecting seat often have phenomena such as excessive or insufficient flesh, local shrinkage porosity, and low surface quality of the products, resulting in a relatively high rejection rate. Summary of the Utility Model
[0003] Therefore, an embodiment of the utility model provides a coated sand hot core box mold to solve the problems that products manufactured by the existing process often have phenomena such as excessive or insufficient flesh and low surface quality of the products, resulting in a relatively high rejection rate.
[0004] To achieve the above object, the embodiment of the utility model provides the following technical solutions:
[0005] A coated sand hot core box mold, comprising:
[0006] A core box body, one side at the bottom of the core box body is a model groove adapted to the shape of the workpiece, and a material discharging groove is provided on one side at the top of the core box body;
[0007] A material discharging rod, the material discharging rod is arranged in the material discharging groove, and the material discharging rod penetrates through the core box body;
[0008] A material discharging plate, the material discharging plate is arranged in the material discharging groove, the material discharging plate is slidably connected with the material discharging groove, and the material discharging plate is fixedly connected with the material discharging rod;
[0009] A material discharging bolt, the material discharging bolt penetrates through the material discharging plate, and one end of the material discharging bolt is fixedly connected with the core box body;
[0010] A material discharging spring, the material discharging spring is sleeved on the material discharging bolt, and one end of the material discharging spring is fixedly connected with the material discharging plate, and the other end is fixedly connected with the material discharging bolt.
[0011] Optionally, mounting legs are provided on the side walls of the core box body on both sides of the material discharging groove.
[0012] Optionally, it further includes a core oil sand pouring cup used in combination with the core box body;
[0013] The resin sand sprue cup includes a shell and a core. The shell is a part forming the outer shape of the sand shell, and the core is a part forming the inner cavity of the sand shell. The upper surface of the shell is circular, and the core is located at the center of the upper surface of the shell. A central hole is provided at the bottom of the shell as a positioning hole, and a boss is provided at the center of the bottom of the core, which is adapted to the position and shape of the positioning hole.
[0014] Optionally, the resin sand sprue cup is an aluminum mold.
[0015] Optionally, there is one positioning hole and one boss.
[0016] Optionally, the slope of the boss is 0 degree.
[0017] Optionally, the distance between the edge of the shell and the edge of the core is 12 - 15 mm.
[0018] The utility model has at least the following beneficial effects:
[0019] In the utility model, a stripper plate is arranged on one side of the core box body, and a stripper rod penetrating through the core box body is connected to the stripper plate. When the mold is closed, the model presses the stripper rod, driving the stripper plate to move and compressing the stripper spring. After the mold is opened, the force on the other side of the model disappears, and the restoring force of the stripper spring drives the model to demold, reducing the influence on the model during the demolding process, making the quality of the castings obtained by the hot core box mold for coated sand better than that of the existing process, greatly reducing the rejection rate, solving the problem of bad defects generated during the casting process, improving the yield rate, and ensuring the quality of the 10 - inch connector seat. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the prior art and the present utility model, the drawings required for describing the prior art and the embodiments of the present utility model will be briefly introduced below. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other drawings can be obtained by extension based on the provided drawings without creative efforts.
[0021] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.
[0022] Figure 1 It is a schematic structural diagram of the first perspective of an embodiment of the present utility model;
[0023] Figure 2 Schematic structural diagram of a resin sand runner cup according to an embodiment of the present utility model;
[0024] Figure 3 is Figure 2 Schematic cross-sectional structure diagram of part A-A in
[0025] Figure 4 Schematic structural diagram of the second perspective of the outer shape main body according to an embodiment of the present utility model;
[0026] Figure 5 Schematic structural diagram of the third perspective of the outer shape main body according to an embodiment of the present utility model;
[0027] Figure 6 Schematic structural diagram of the fourth perspective of the outer shape main body according to an embodiment of the present utility model;
[0028] Figure 7 Schematic structural diagram of the fifth perspective of the outer shape main body according to an embodiment of the present utility model;
[0029] Figure 8 Schematic structural diagram of the sixth perspective of the cylindrical core according to an embodiment of the present utility model;
[0030] Figure 9 Schematic structural diagram of the seventh perspective of the cylindrical core according to an embodiment of the present utility model;
[0031] Figure 10 Schematic structural diagram of the eighth perspective of the main core according to an embodiment of the present utility model;
[0032] Figure 11 Schematic structural diagram of the ninth perspective of the main core according to an embodiment of the present utility model.
[0033] Explanation of reference numerals:
[0034] 1. Core box body; 2. Stripping plate; 3. Stripping rod; 4. Stripping spring; 5. Stripping bolt; 7. Installation leg; 8. Core part; 9. Outer shell; 10. Boss; 11. Chilled iron. Detailed implementation manners
[0035] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0036] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more. Terms such as "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present utility model and the above-mentioned drawings are intended to distinguish the objects being referred to. For a solution with a time sequence process, this way of term expression does not necessarily need to be understood as describing a specific order or sequence. For a solution of a device structure, this way of term expression also does not distinguish the importance level, positional relationship, etc.
[0037] In addition, the terms "comprising", "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units that are clearly listed, but may also include other steps or units that are inherent to these processes, methods, products or devices although not clearly listed, or steps or units added based on further optimized solutions conceived according to the present utility model.
[0038] As Figure 1 shown, a hot box mold for coated sand disclosed by the present utility model includes:
[0039] A core box body 1, one side at the bottom of the core box body 1 is a model groove adapted to the shape of the workpiece, and one side at the top of the core box body 1 is provided with a knockout groove;
[0040] A knockout rod 3, the knockout rod 3 is arranged in the knockout groove, and the knockout rod 3 penetrates through the core box body 1;
[0041] A knockout plate 2, the knockout plate 2 is arranged in the knockout groove, the knockout plate 2 is slidably connected with the knockout groove, and the knockout plate 2 is fixedly connected with the knockout rod 3;
[0042] A knockout bolt 5, the knockout bolt 5 penetrates through the knockout plate 2, and one end of the knockout bolt 5 is fixedly connected with the core box body 1;
[0043] A knockout spring 4, the knockout spring 4 is sleeved on the knockout bolt 5, and one end of the knockout spring 4 is fixedly connected with the knockout plate 2 and the other end is fixedly connected with the knockout bolt 5.
[0044] The mold is heated to above 200 °C by a heating tube, and coated sand is injected into the hot core box body 1 from the sand injection port of the hot core box body 1 through a sand injection head of a sand injector. After the coated sand is cured and formed, the mold is opened to take out the coated sand core. The quality of the castings obtained by the hot box mold for coated sand is better than that of the existing process, the scrap rate is greatly reduced, the problem of bad defects generated in the casting process is solved, the yield is improved, and the quality of the 10-inch connector is ensured.
[0045] The stripping bolt 5 has a nut at one end and an external thread at the other end. The stripping bolt 5 is connected to the core box body 1 through the external thread at the front end (the threaded end completely enters the core box). The portion between the threaded end and the nut is a smooth portion. The stripping plate 2 is sleeved on the smooth portion. There is no connection between the stripping plate 2 and the stripping bolt 5, and the stripping plate 2 can slide along the stripping bolt 5.
[0046] The above-mentioned ejection rod 3 passes through the core box body 1, wherein some of the ejection rods 3 are slightly longer, and the other part is slightly shorter. The long one extends out a part after passing through the core box body 1, and the short one is completely placed in the core box body 1. When the mold is closed, the model will squeeze the long ejection rod 3, so that it will be retracted into the core box body 1, and at the same time drive the ejection plate 2 to slide along the ejection bolt 5. The ejection plate 2 will also drive the short ejection rod 3 to move (as a guide structure). The movement of the ejection plate 2 will also compress the ejection spring 4. After mold separation, the ejection spring 4 pushes the ejection plate 2 under the action of the restoring force, and drives the ejection rod 3 to push out the model. The demolding is convenient, and will not affect the model to cause excess or less meat, thereby improving the yield rate.
[0047] In a further embodiment, mounting legs 7 are provided on the side walls of the core box body 1 on both sides of the material withdrawal groove.
[0048] The arrangement of the mounting legs 7 facilitates the installation of the entire hot core box on the sand shooting machine.
[0049] like Figure 2 and Figure 3 As shown, it also includes a resin sand pouring cup used in conjunction with the core box body 1;
[0050] The resin sand pouring cup includes an outer shell 9 and a core 8, wherein the outer shell 9 is a part forming the outer shape of the sand shell, and the core 8 is a part forming the inner cavity of the sand shell; the upper surface of the outer shell 9 is circular, and the core 8 is located at the center of the upper surface of the outer shell 9, and a center hole is opened at the bottom of the outer shell 9 as a positioning hole, and a boss 10 is arranged at the bottom center of the core 8, which is adapted to the position and shape of the positioning hole.
[0051] The coated sand hot core box mold of the 10-inch connecting seat also includes a manual fat sand pouring cup mold. A set of manual fat sand molds includes a core 8 and a shell 9. A cylindrical boss 10 is provided at the center of the bottom of the core 8, and a positioning hole is provided at the bottom of the shell 9. The size of the boss 10 at the bottom of the core 8 and the positioning hole at the bottom of the shell 9 are matched with each other, leaving a gap to allow smooth passage and ensure the positioning requirements of the core 8 and the outer mold within the allowable tolerance range.
[0052] In an optional embodiment, when the handmade resin-mixed sand pouring cup mold is connected to the 10-inch connecting seat coated sand mold body, a positioning hole is left through the 10-inch connecting seat coated sand mold body, and the connection gap is 0.4mm.
[0053] The resin sand runner cup is an aluminum mold.
[0054] There is one positioning hole and one boss 10 provided.
[0055] The slope of the boss 10 is 0 degrees.
[0056] The distance between the edge of the outer shell 9 and the edge of the core part 8 is 12 - 15 mm.
[0057] In an alternative embodiment, as Figure 10 and Figure 11 shown, the 10 - inch connector hot core box mold includes one chill. During the core - making process, the chill needs to be placed at a fixed position of the hot core box mold before mold - closing and sand shooting. After sand shooting, the chill is wrapped in the coated sand hot core box and taken out together with the sand shell during demolding.
[0058] In an alternative embodiment, as Figures 4 - 11 shown, the 10 - inch connector coated sand mold is made by separately making coated sand shells, and then the Figures 8 - 11 sand shells are successively placed into the interior of the Figure 4 and Figure 5 sand shells according to the fixed position of the core head, and then the Figure 6 and Figure 7 sand shells are combined with the Figure 4 and Figure 5 sand shells to form the main body of the 10 - inch connector coated sand shell. The prepared runner cup is installed on the runner of the 10 - inch connector coated sand shell main body to complete shell assembly.
[0059] In an alternative embodiment, as Figures 4 - 11 shown, a core gap is left at the contact of the core head, and the gap is 0.2 mm on one side.
[0060] The usage method of the coated sand hot core box mold is as follows:
[0061] S1. Use the Figures 4 - 11 coated sand mold shown to make the main body of the coated sand core box.
[0062] S2. Use the Figure 2 and Figure 3 runner cup core box shown to make the runner cup sand shell.
[0063] S3. Manually assemble the coated sand shell, core box and runner cup, remove flash, glue, and brush the coating.
[0064] S4. Place the Figures 2 - 11 assembled coated sand shell into the resin sand and bury it well, then cast it to form a 10 - inch connector.
[0065] This resin sand mold is simple, practical and easy to operate. The coated sand molding uses an automated production line, which has high production efficiency, reduces the working intensity, improves the work efficiency and has little pollution. The coated sand layer is thin, the consumption is small, the production cost is low, the waste is small, and the used molding sand can be recycled.
[0066] The above several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.
[0067] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written out should also be considered as within the scope described in this specification.
[0068] In the above text, the present utility model has been described in a relatively specific and detailed manner through general descriptions and specific embodiments. It should be noted that, without departing from the concept of the present utility model, it is obvious that several modifications and improvements can still be made to these specific embodiments, and these all belong to the protection scope of this application. Therefore, the protection scope of the patent of this application shall be subject to the appended claims.
Claims
1. A coated sand hot core box mold, characterized in that: include: A core box body (1), wherein one side of the bottom of the core box body (1) is a mold groove adapted to the shape of the workpiece, and one side of the top of the core box body (1) is provided with a material return groove; A material withdrawal rod (3), the material withdrawal rod (3) being arranged in the material withdrawal groove, and the material withdrawal rod (3) passing through the core box body (1); A material stripping plate (2), the material stripping plate (2) is arranged in the material stripping groove, the material stripping plate (2) is slidably connected to the material stripping groove, and the material stripping plate (2) is fixedly connected to the material stripping rod (3); A material stripping bolt (5), wherein the material stripping bolt (5) passes through the material stripping plate (2), and one end of the material stripping bolt (5) is fixedly connected to the core box body (1); A material withdrawal spring (4), wherein the material withdrawal spring (4) is sleeved on the material withdrawal bolt (5), and one end of the material withdrawal spring (4) is fixedly connected to the material withdrawal plate (2), and the other end is fixedly connected to the material withdrawal bolt (5), and also includes a grease-sand pouring cup used in conjunction with the core box body (1); The resin sand pouring cup comprises an outer shell (9) and a core (8), wherein the outer shell (9) is a part forming the outer shape of the sand shell, and the core (8) is a part forming the inner cavity of the sand shell; the upper surface of the outer shell (9) is circular, and the core (8) is located at the center of the upper surface of the outer shell (9); a center hole is opened at the bottom of the outer shell (9) as a positioning hole, and a boss (10) is arranged at the center of the bottom of the core (8) to match the position and shape of the positioning hole.
2. The coated sand hot core box mold according to claim 1, characterized in that: The side walls of the core box body (1) on both sides of the material withdrawal groove are provided with mounting legs (7).
3. The coated sand hot core box mold according to claim 1, characterized in that: The grease-sand pouring cup is an aluminum mold.
4. The coated sand hot core box mold according to claim 1, characterized in that: The positioning hole and the boss (10) are each provided with one.
5. The coated sand hot core box mold according to claim 4, characterized in that: The inclination of the boss (10) is 0 degrees.
6. The coated sand hot core box mold according to claim 1, characterized in that: The distance between the edge of the shell (9) and the edge of the core (8) is 12-15 mm.