Medium-temperature wax investment casting structure of cold wax core for thick and large ball valve body
By using cold wax core and V-shaped projection support in the medium-temperature wax investment casting structure, the shrinkage deformation problem caused by uneven wax shrinkage during the casting process of thick large-piece products is solved, and the production cycle is shortened and cost is reduced.
Patent Information
- Application Number
- CN202420798535.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-04-16
AI Technical Summary
During the medium-temperature wax investment casting process, thick and large products cause the wax mold to shrink and deform due to uneven shrinkage of wax materials, which extends the production cycle, increases costs and reduces efficiency.
Design a medium-temperature wax investment casting structure with a cold wax core for a thick large ball valve body, including a wax mold and a cold wax core. The cold wax core is installed on the pull-out core, and V-shaped projection support is provided on both sides to prevent the wax from overheating and unevenly shrinking.
Effectively prevent local overheating of wax materials, ensure uniform shrinkage of wax materials, reduce large-plane concave deformation of products, shorten production cycles, and reduce production costs.
Smart Images
Figure CN222817893U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of precision casting and relates to a medium-temperature wax investment casting structure with a cold wax core for a thick and large ball valve body. Background Art
[0002] Medium temperature wax investment casting is a near-net-shape molding technology for producing high-quality precision castings, and its application in industrial production is becoming more and more widespread. At present, thick and large products are gradually being added to the medium temperature wax investment casting process. However, for thick and large products, after the wax material is molded by the mold, the wax mold shrinks and deforms due to the uneven shrinkage of the wax material, which prolongs the product production cycle, increases production costs and reduces production efficiency. The utility model effectively solves the shrinkage and deformation problem caused by inconsistent shrinkage of thick and large products during cooling. It reduces the time for repairing the valve body of thick and large ball valves, greatly shortens the production cycle and reduces production costs. Summary of the invention
[0003] The purpose of the utility model is to provide a medium-temperature wax investment casting structure with a cold wax core for a thick and large ball valve body, which can solve the problem of shrinkage and deformation of the wax mold in actual production, reduce the subsequent repair time, reduce the finished products produced, shorten the production cycle, and reduce the production cost. It is suitable for the production of medium-temperature wax ball valves with thick and large flanges.
[0004] According to the technical solution provided by the utility model: a medium-temperature wax investment casting structure with a cold wax core for a thick and large ball valve body, including a wax mold, a cavity is left in the wax mold, and a cold wax core is arranged in the cavity; the wax mold includes an upper mold and a lower mold arranged up and down, and a left core pull and a right core pull are respectively installed on the left and right sides of the upper mold and the lower mold; a docking structure is provided between the left core pull and the right core pull; cold wax core supports are provided on the left and right sides of the cold wax core.
[0005] As a further improvement of the present invention, an upper parting surface is provided at the bottom of the upper die of the mold.
[0006] As a further improvement of the utility model, a lower parting surface is provided on the top of the lower mold of the mold.
[0007] As a further improvement of the utility model, a left mounting hole and a right mounting hole are left on the left and right sides between the upper mold and the lower mold of the mold, the left core pulling is horizontally arranged, a left positioning ring is provided on the left side of the left core pulling, and the left positioning ring is against the outside of the left mounting hole, the right core pulling is horizontally arranged, a right positioning ring is provided on the right side of the right core pulling, and the right positioning ring is against the outside of the right mounting hole.
[0008] As a further improvement of the utility model, the docking structure includes a docking boss and a docking groove, and the docking boss and the docking groove are respectively located on the opposite surfaces of the left core pulling and the right core pulling.
[0009] As a further improvement of the utility model, the cold wax core is installed on the right core pulling device, and the cold wax core comprises a cold wax core body, and a core pulling hole is opened in the middle of the cold wax core body.
[0010] As a further improvement of the utility model, the cold wax core support is a V-shaped protrusion.
[0011] As a further improvement of the present invention, the V-shaped protrusion has an included angle between 30° and 40°.
[0012] The positive effects of this application are:
[0013] The cold wax core of the utility model can effectively prevent the wax material from being locally overheated, so that the wax material shrinks evenly and prevents the large surface of the product from shrinking and deforming. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the utility model.
[0015] Figure 2 It is a schematic diagram of the structure of the utility model when it is working.
[0016] Figure 3 It is a schematic diagram of the explosion structure of the utility model when working.
[0017] Figure 4 The utility model is a schematic structural diagram of the ball valve body wax mold.
[0018] Figure 5 It is a structural schematic diagram of the cold wax core of the utility model.
[0019] Figure 1-Figure 5 The mold comprises a left core puller 1, a cavity 2, an upper mold 3, a right core puller 4, a cold wax core 5, a lower mold 6, a ball valve body wax mold 7, etc. DETAILED DESCRIPTION
[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0021] In order to enable those skilled in the art to better understand the solution of the utility model, 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 of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described herein. In addition, similar terms such as "including" and "having" mean that in addition to those contents already listed in "including" and "having", other contents that have not been listed can also be "included" and "having"; for example, a process, method, system, product or device that can include a series of steps or units is not necessarily limited to those steps or units that have been clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0023] Due to the angle of the drawing, some components may not be drawn, but their positions and connection relationships can be partially understood based on the text expression.
[0024] like Figure 1 As shown, the utility model is a medium-temperature wax investment casting structure with a cold wax core for a thick and large ball valve body, comprising a wax mold, a cavity 2 is left in the wax mold, and a cold wax core 5 is arranged in the cavity 2.
[0025] like Figure 3 As shown, the wax mold comprises an upper mold 3 and a lower mold 6 arranged up and down, and a left core puller 1 and a right core puller 4 are respectively installed on the left and right sides of the upper mold 3 and the lower mold 6.
[0026] The upper mold 3 has an upper parting surface at the bottom to form the top surface of the wax mold; the lower mold 6 has a lower parting surface 6-1 at the top to form the bottom surface of the wax mold.
[0027] A left mounting hole and a right mounting hole are left on the left and right sides between the upper mold 3 and the lower mold 6, respectively used to mount the left core pull 1 and the right core pull 4. The left core pull 1 is horizontally arranged, and a left positioning ring 1-1 is arranged on the left side of the left core pull 1, and the left positioning ring 1-1 abuts against the outside of the left mounting hole to ensure that the left core pull 1 is in the correct position, and the right core pull 4 is horizontally arranged, and a right positioning ring 4-1 is arranged on the right side of the right core pull 4, and the right positioning ring 4-1 abuts against the outside of the right mounting hole to ensure that the right core pull 4 is in the correct position.
[0028] In order to improve the casting accuracy of the wax mold, a docking structure is provided between the left core pull 1 and the right core pull 4. The docking structure includes a docking boss and a docking groove. The docking boss and the docking groove are respectively located on the opposite surfaces of the left core pull 1 and the right core pull 4.
[0029] The cold wax core 5 is installed on the right core pull 4, as shown in FIG. Figure 5 As shown, the cold wax core 5 includes a cold wax core body 5 - 1 , and a core pulling hole 5 - 2 is opened in the middle of the cold wax core body 5 - 1 for cooperating with the right core pulling 4 .
[0030] In order to improve the connection firmness between the cold wax core 5 and the wax model, cold wax core supports 5-3 are provided on the left and right sides of the cold wax core 5. The cold wax core supports 5-3 are V-shaped protrusions, and the angle of the V-shaped protrusions is between 30° and 40°.
[0031] The working process of the utility model is as follows:
[0032] like Figure 2 As shown, a thin layer of mold release agent is evenly applied to the inner cavity and parting surface of the left core pull 1, the upper mold 3, the right core pull 4, and the lower mold 6. Before pressing the wax mold 7, the cold wax core 5 is pressed first. After the cold wax core 5 is completely cooled, the cold wax core 5 is installed on the right core pull 4. Then the ball valve body wax mold 7 is pressed and taken out after the wax model 7 solidifies.
[0033] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.
Claims
1. A medium temperature wax investment casting structure with a cold wax core for a thick ball valve body, comprising a wax mold, a cavity (2) being left in the wax mold, characterized in that: A cold wax core (5) is provided in the cavity (2); the wax mold comprises an upper mold (3) and a lower mold (6) arranged up and down, and a left core pull (1) and a right core pull (4) are respectively installed on the left and right sides of the upper mold (3) and the lower mold (6); a docking structure is provided between the left core pull (1) and the right core pull (4); and cold wax core supports (5-3) are provided on the left and right sides of the cold wax core (5).
2. The medium temperature wax investment casting structure with cold wax core for thick and large ball valve body as claimed in claim 1, characterized in that: The bottom of the upper mold (3) of the mold is provided with an upper parting surface.
3. The medium temperature wax investment casting structure with cold wax core for thick and large ball valve body as claimed in claim 1 is characterized in that: The top of the lower mold (6) is provided with a lower parting surface.
4. The medium temperature wax investment casting structure with cold wax core for thick and large ball valve body as claimed in claim 1 is characterized in that: A left mounting hole and a right mounting hole are left on the left and right sides between the upper mold (3) and the lower mold (6); the left core puller (1) is arranged horizontally; a left positioning ring (1-1) is arranged on the left side of the left core puller (1); the left positioning ring (1-1) abuts against the outer side of the left mounting hole; the right core puller (4) is arranged horizontally; a right positioning ring (4-1) is arranged on the right side of the right core puller (4); the right positioning ring (4-1) abuts against the outer side of the right mounting hole.
5. The medium temperature wax investment casting structure with cold wax core for thick and large ball valve body as claimed in claim 1 is characterized in that: The docking structure comprises a docking boss and a docking groove, wherein the docking boss and the docking groove are respectively located on opposite surfaces of the left core puller (1) and the right core puller (4).
6. The medium temperature wax investment casting structure with cold wax core for thick and large ball valve body as claimed in claim 1, characterized in that: The cold wax core (5) is mounted on the right core pulling device (4). The cold wax core (5) comprises a cold wax core body (5-1). A core pulling hole (5-2) is formed in the middle of the cold wax core body (5-1).
7. The medium temperature wax investment casting structure with cold wax core for thick and large ball valve body as claimed in claim 1 is characterized in that: The cold wax core support (5-3) is a V-shaped protrusion.
8. The medium temperature wax investment casting structure with cold wax core for thick and large ball valve body as claimed in claim 7, characterized in that: The V-shaped protrusion has an included angle of 30°-40°.