Large wax piece cold wax fixing structure for precision casting
By designing a cold wax fixing structure for wax parts that includes upper and lower fixing plates and a cold wax fixing structure in precision casting, the problem of wax pattern defects caused by the addition of cold wax in large wax parts molds is solved, and casting accuracy and work efficiency are improved. effect.
Patent Information
- Application Number
- CN202421029540.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-13
AI Technical Summary
During the precision casting process, adding cold wax directly to the mold of large wax parts will cause wax defects such as flow marks and meat loss on the surface, resulting in wax scrapping and affecting production efficiency and product quality.
A cold wax fixing structure for large wax parts for precision casting is designed, including an upper fixing plate and a lower fixing plate. The stability and reliability of the structure are ensured through screw thread connection, and multiple plane ejections are set on the inner wall of the lower plate of the mold. , forming a cold wax fixed structure to solve the problem of wax pattern defects.
Through this structure, the problems of dents and ejector pin damage during the demoulding process of wax products are solved, the casting accuracy of the product is improved, repair and production costs are reduced, and work efficiency is improved.
Smart Images
Figure CN222385857U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of precision casting automatic molds, in particular to a cold wax fixing structure for large wax pieces used in precision casting. Background Art
[0002] Precision casting is a manufacturing process in which molten metal or alloy is accurately poured into a pre-prepared shell to solidify it into a part or workpiece of the desired shape. It has the following characteristics: high precision, good surface quality, high dimensional accuracy, good internal quality, and high production efficiency. In the process of making precision casting shells, wax molds are required. High-precision precision casting molds will be used in the wax mold making process. The process flow of precision casting technology is mainly divided into two parts: mold making and casting. The first is mold making. Mold making is the key to the entire process. Molds are generally made of materials with high temperature resistance and low thermal expansion coefficient, such as aluminum alloy, plastic mold steel, carbide mold steel, high-speed steel mold material, stainless steel mold material, etc. Casting mold refers to the mold used to form castings in the casting forming process. Casting molds are supporting casting processes, mainly gravity casting molds, high-pressure casting molds, low-pressure casting molds, extrusion casting molds, etc. Casting molds are one of the most important process equipment in casting production and have a great impact on the quality of castings. The improvement of casting mold technology will be of great significance to improving the quality of castings, developing new castings, and improving the level of near-net processing. The shape and size of the product are made in the mold, and automatic modules and temperature control devices are added. The production of the mold requires high precision to ensure the accuracy and surface quality of the product. Improvements in mold structure and design can ensure product diversity, improve efficiency in the production process, and reduce the use of corresponding auxiliary tools and materials.
[0003] For molds with thick product structures, wax molds are made by adding cold wax. In traditional casting processes, directly adding cold wax to the molds of large wax parts will cause wax defects such as flow lines and lack of meat on the surface of large wax parts, which will bring great difficulties to subsequent repairs and may even lead to the scrapping of the wax mold, making it unable to meet production needs and reduce the complexity of product production, while reducing work efficiency and increasing costs. Utility Model Content
[0004] In order to make up for the above shortcomings, the utility model provides a cold wax fixing structure for large wax parts for precision casting, which aims to improve the problem that directly adding cold wax into the mold of large wax parts will cause wax defects such as flow lines and lack of meat on the surface of large wax parts, which will bring great difficulties to subsequent shaping and may even lead to the scrapping of the wax model.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a cold wax fixing structure for large wax parts for precision casting, comprising an upper fixing plate and a lower fixing plate, the bottom wall of the upper fixing plate is fixedly connected to the mold upper plate, the left and right sides of the top wall of the lower fixing plate are fixedly connected to mold feet, the top ends of the two mold feet are fixedly connected to the mold lower plate, the middle part of the front top end of the mold lower plate is fixedly connected to a wax injection port, the four corners of the top wall of the lower fixing plate are fixedly connected to guide columns, the output ends of the multiple guide columns are fixedly connected to an ejector plate, the top wall of the ejector plate is fixedly connected to multiple ejector rods, the inner wall of the mold lower plate is provided with multiple plane ejections, and the mold upper plate and the mold lower plate are respectively processed with cold wax fixing structures.
[0006] As a further description of the above technical solution:
[0007] The upper fixing plate is threadedly connected to the mold upper plate via screws.
[0008] As a further description of the above technical solution:
[0009] Positioning pins are arranged at four corners of the top wall of the lower plate of the mold, and the bottom end of the upper plate of the mold is engaged in the positioning pins.
[0010] As a further description of the above technical solution:
[0011] The two mold feet are threadedly connected to the mold lower plate via screws.
[0012] As a further description of the above technical solution:
[0013] The lower fixing plate is threadedly connected to the mold foot via screws.
[0014] As a further description of the above technical solution:
[0015] The mold lower plate is threadedly connected to the wax injection port via bolts.
[0016] As a further description of the above technical solution:
[0017] A plurality of ejector pins penetrate the bottom wall of the lower plate of the mold.
[0018] As a further description of the above technical solution:
[0019] Guide columns are arranged at the four corners of the bottom wall of the ejection plate.
[0020] As a further description of the above technical solution:
[0021] A plurality of guide posts are fixedly connected at four corners of the top wall of the lower fixing plate.
[0022] As a further description of the above technical solution:
[0023] A cold wax fixing structure is arranged between the upper mold plate and the lower mold plate.
[0024] The utility model has the following beneficial effects:
[0025] 1. In the utility model, a flat ejector is installed on the top of a circular ejector rod to form a flat ejector mechanism, which solves the problem of dents caused by ejection of the wax-type product by the ejector rod and the problem that the circular ejector rod is easily damaged. The requirement of one-time forming with little or no repair of the wax-type product can be met, and the casting accuracy of the product is improved, the work efficiency is improved, and the cost is reduced.
[0026] 2. In the present invention, the screw thread connection can ensure the close fit between the upper fixing plate and the upper plate of the mold, thereby improving the stability and reliability of the entire fixing structure. This connection method is not easy to loosen, can withstand greater pressure and vibration, and is suitable for various environments and usage scenarios in the precision casting process. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a front view of a cold wax fixing structure for a large wax piece for precision casting proposed by the utility model;
[0028] Figure 2 A three-dimensional diagram of a cold wax fixing structure for a large wax piece for precision casting proposed by the utility model;
[0029] Figure 3 The utility model provides a top view of a lower plate of a cold wax fixing structure mold for a large wax piece for precision casting.
[0030] Legend:
[0031] 1. Upper fixed plate; 2. Upper plate of mold; 3. Lower plate of mold; 4. Mold foot; 5. Lower fixed plate; 6. Wax injection port; 7. Ejector rod; 8. Guide column; 9. Ejector plate; 10. Plane ejector; 11. Positioning pin. DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0033] Reference Figure 1 , Figure 2 and Figure 3The utility model provides an embodiment: a cold wax fixing structure for large wax parts for precision casting, comprising an upper fixing plate 1 and a lower fixing plate 5, the bottom wall of the upper fixing plate 1 is fixedly connected to the mold upper plate 2, the left and right sides of the top wall of the lower fixing plate 5 are fixedly connected to mold feet 4, the top ends of the two mold feet 4 are fixedly connected to the mold lower plate 3, the middle part of the front top of the mold lower plate 3 is fixedly connected to a wax injection port 6, the four corners of the top wall of the lower fixing plate 5 are fixedly connected to guide columns 8, the output ends of the multiple guide columns 8 are fixedly connected to the ejector plate 9, the top wall of the ejector plate 9 is fixedly connected to multiple ejector rods 7, the inner wall of the mold lower plate 3 A plurality of plane ejectors 10 are provided, and cold wax fixing structures are processed on the mold upper plate 2 and the mold lower plate 3 respectively; positioning pins 11 are provided at the four corners of the top wall of the mold lower plate 3, and the bottom end of the mold upper plate 2 is engaged in the positioning pins 11; two mold feet 4 are connected to the mold lower plate 3 by screw threads; the lower fixed plate 5 is connected to the mold feet 4 by screw threads; the mold lower plate 3 is connected to the wax injection port 6 by bolt threads; a plurality of ejector rods 7 penetrate the bottom wall of the mold lower plate 3; a plurality of guide columns 8 are fixedly connected to the four corners of the top wall of the lower fixed plate 5; a cold wax fixing structure is provided between the adjacent mold upper plate 2 and the mold lower plate 3;
[0034] Specifically, after the mold upper plate 2 and the mold lower plate 3 are engaged through the positioning pin 11 through the bottom wall of the upper fixed plate 1, cold wax is poured into the fixing mechanism from the wax injection port 6, and the plane ejector 10 is installed on the top of the circular ejector 7 to form a plane ejector 10 mechanism, and the ejector 7 is used to eject the wax-type product, and solve the problem of dents and the problem that the circular ejector 7 is easily damaged. The positioning pin 11 ensures that the position of the mold upper plate 2 on the mold lower plate 3 is accurate, which is very important for the manufacturing process that requires high-precision alignment, and can prevent product defects and defective rates. Through the screw thread connection, the connection between the mold foot 4 and the mold lower plate 3 is very convenient. Only a suitable screwdriver or wrench is needed to easily install the mold foot 4 on the mold lower plate 3, or remove it from the mold lower plate 3. This connection method does not require complex tools or skills, making the assembly and disassembly process simple and efficient. The screw connection is usually firm and can ensure a stable connection between the lower fixed plate 5 and the mold foot 4. This connection method can maintain high reliability under various working conditions. When the bolts are tightened, the gap between the lower plate 3 of the mold and the wax injection port 6 can be effectively compressed to form a good sealing effect to prevent wax leakage. The use of multiple ejector rods 7 can ensure that the mold is evenly stressed during processing or demolding, thereby improving production efficiency. Uniform stress can prevent deformation or defects of the product during demolding, ensuring the quality and appearance of the product. The main function of the guide column 8 is to guide the moving path of the ejector plate 9 to ensure that it always maintains the correct direction during the working process, thereby avoiding deflection or misalignment. This helps to maintain the stability and accuracy of the machine or equipment. The main function of the guide column 8 is to ensure that the relevant components can be accurately positioned when moving or installing, and move smoothly on the predetermined path. This helps to ensure the accuracy and stability of the equipment. Since the cold wax fixing structure can ensure the close fit of the mold, during the wax injection and dewaxing process, it can reduce failures and downtime caused by poor mold fit, thereby improving production efficiency.
[0035] Reference Figure 1 , the upper fixing plate 1 is connected to the mold upper plate 2 by screw threads;
[0036] Specifically, by means of screw connection, the relative position between the upper fixing plate 1 and the mold upper plate 2 can be adjusted relatively easily to meet different process requirements.
[0037] Working principle: After the mold upper plate 2 and the mold lower plate 3 on the bottom wall of the upper fixed plate 1 are engaged with the positioning pin 11, cold wax is poured into the fixing mechanism from the wax injection port 6, and the plane ejector 10 is installed to the top of the circular ejector rod 7 to form a plane ejector 10 mechanism, and the ejector rod 7 is used to eject the wax product, and solve the problem of dents and the problem that the circular ejector rod 7 is easily damaged, which can meet the requirements of one-time forming with little or no repair of the wax product, improve the casting accuracy of the product, improve work efficiency and reduce costs, and the upper fixed plate 1 and the mold upper plate 2 are tightly connected together by screws. Threaded connection is a very stable and reliable connection method, which can ensure that the connection between the two is more stable and not easy to loosen or fall off. When maintenance or replacement of parts is required, it can be easily disassembled and reassembled, thereby improving work efficiency. Since the screw threaded connection is reusable, when multiple disassembly and assembly are required, this connection method can maintain good performance and is not easy to damage.
[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A cold wax fixing structure for large wax parts for precision casting, comprising an upper fixing plate (1) and a lower fixing plate (5), characterized in that: The bottom wall of the upper fixed plate (1) is fixedly connected to the mold upper plate (2), the left and right sides of the top wall of the lower fixed plate (5) are fixedly connected to mold feet (4), the top ends of the two mold feet (4) are fixedly connected to the mold lower plate (3), the middle part of the front top end of the mold lower plate (3) is fixedly connected to a wax injection port (6), the four corners of the top wall of the lower fixed plate (5) are fixedly connected to guide columns (8), the output ends of the plurality of guide columns (8) are fixedly connected to an ejection plate (9), the top wall of the ejection plate (9) is fixedly connected to a plurality of ejector rods (7), the inner wall of the mold lower plate (3) is provided with a plurality of plane ejections (10), and the mold upper plate (2) and the mold lower plate (3) are respectively processed with cold wax fixing structures.
2. A cold wax fixing structure for large wax parts for precision casting according to claim 1, characterized in that: The upper fixing plate (1) is threadedly connected to the mold upper plate (2) via screws.
3. A cold wax fixing structure for large wax parts for precision casting according to claim 1, characterized in that: Positioning pins (11) are provided at the four corners of the top wall of the mold lower plate (3), and the bottom end of the mold upper plate (2) is engaged in the positioning pins (11).
4. A cold wax fixing structure for large wax parts for precision casting according to claim 1, characterized in that: The two mold feet (4) are threadedly connected to the mold lower plate (3) via screws.
5. The cold wax fixing structure for large wax parts for precision casting according to claim 1, characterized in that: The lower fixing plate (5) is threadably connected to the mold foot (4) via screws.
6. A cold wax fixing structure for large wax parts for precision casting according to claim 1, characterized in that: The mold lower plate (3) is threadedly connected to the wax injection port (6) via bolts.
7. The cold wax fixing structure for large wax parts for precision casting according to claim 1, characterized in that: The plurality of ejector pins (7) penetrate the bottom wall of the mold lower plate (3).
8. The cold wax fixing structure for large wax parts for precision casting according to claim 1, characterized in that: Guide columns (8) are provided at the four corners of the bottom wall of the ejection plate (9).
9. The cold wax fixing structure for large wax parts for precision casting according to claim 1, characterized in that: The plurality of guide posts (8) are fixedly connected to the four corners of the top wall of the lower fixed plate (5).
10. The cold wax fixing structure for large wax parts for precision casting according to claim 1, characterized in that: A cold wax fixing structure is provided between the adjacent mold upper plate (2) and the adjacent mold lower plate (3).