Valve body air hole changing mold
By designing air hole slots and arc-shaped transition connections in the valve body mold, the problem of easy gas trapping in the metal liquid during casting is solved, and the pass rate and production efficiency of valve body production are significantly improved.
Patent Information
- Application Number
- CN202421121742.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-22
AI Technical Summary
During the casting process, the metal liquid is prone to gas trapping due to the complex structure of the existing valve body mold, resulting in many bubble cells on the valve body, which reduces the production pass rate.
A valve body-formed air hole mold is designed, and the metal liquid is smooth by opening a air hole groove between the first bump and the second bump, and forming an arc-shaped transition connection between the split channel, the casting grid and the inner gate connection. Flow into the cast cavity to avoid gas retention.
It effectively improves the pass rate of valve body production, from 40% to 90%, reduces production costs and improves production efficiency.
Smart Images
Figure CN222307281U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of molds, and particularly relates to a valve body air hole modification mold. Background Art
[0002] The valve body is an important component in various mechanical equipment, and has a significant impact on the operating stability, safety and life of the equipment. Valve body casting refers to the process of pouring molten metal into a mold and cooling and solidifying it to form a valve body. Therefore, the valve body mold directly affects the shape, dimensional accuracy and performance of the valve body.
[0003] Due to the complex structure of the valve plate, the casting cavity formed on the template of the existing valve body mold is also relatively tortuous and complex. It is not easy to exhaust the air in the mold after pouring. Therefore, bubble holes are prone to appear on the molded valve body, resulting in a low pass rate of valve body production. Utility Model Content
[0004] The utility model aims to provide a valve body air hole modification die in view of the above problems existing in the prior art.
[0005] The purpose of the utility model can be achieved through the following technical solutions: a valve body air hole modification mold, comprising a fixed mold plate, a casting cavity, a pouring system and a positioning groove are formed on the fixed mold plate, and the molten metal flows into the casting cavity through the pouring system;
[0006] The structural principle of the pouring system is as follows: a plurality of horizontal gates are provided on the side of the fixed template, and the molten metal is injected through the horizontal gates and flows into the main channel, a plurality of branch channels are formed on the main channel, and a pouring grid is formed at the end of the branch channel, and an inner gate is provided between the pouring grid and the casting cavity, and the molten metal flows into the casting cavity through the inner gate;
[0007] The casting mold cavity includes an upper mold cavity and a lower mold cavity, the lower mold cavity is provided with a casting hole in the middle section, a first protrusion is formed between the casting hole and the upper mold cavity, a second protrusion is formed between the casting hole and the inner gate, and an air hole groove is provided between the first protrusion and the second protrusion; a positioning groove is provided on the other side of the fixed mold plate.
[0008] In the above-mentioned valve body air hole modification mold, a push rod hole is formed on the fixed mold plate at the bottom of the casting grid.
[0009] In the above-mentioned valve body air hole modification mold, arc-shaped transition connections are formed at the connections between the branch channel and the pouring grid, between the pouring grid and the inner gate, and between the inner gate and the casting cavity.
[0010] In the above-mentioned valve body modified air hole mold, arc-shaped transition connections are formed at the connections between the upper cavity and the first protrusion, between the inner gate and the second protrusion, and between the first protrusion, the second protrusion, the air hole groove and the casting hole.
[0011] In the above-mentioned valve body air hole modification mold, a plurality of positioning holes are opened at the bottom of the positioning groove, and the number of the positioning holes should be no less than 3.
[0012] Compared with the prior art, the valve body air hole modification mold provided by the utility model effectively solves the problem of air being easily trapped after the molten metal flows into the casting cavity by opening an air hole groove between the first protrusion and the second protrusion, thereby avoiding the appearance of air bubbles in the cast valve body, greatly improving the production qualification rate of the valve body, reducing production costs, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a structural schematic diagram of the valve body air hole modification mold;
[0014] Figure 2 yes Figure 1 Magnified view of the structure in circle A.
[0015] In the above figure, 100, fixed template; 110, casting cavity; 111, upper cavity; 112, lower cavity; 113, casting hole; 114, first protrusion; 115, second protrusion; 116, air hole groove; 120, pouring system; 121, cross gate; 122, main channel; 123, branch channel; 124, pouring grid; 125, ejector hole; 126, inner gate; 130, positioning groove; 131, positioning hole. DETAILED DESCRIPTION
[0016] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0017] like Figure 1 to Figure 2 As shown, the valve body modified vent mold includes a fixed mold plate 100, on which a casting cavity 110, a pouring system 120 and a positioning groove 130 are integrally formed. After the fixed mold plate 100 is fixed on the equipment machine tool through the positioning groove 130, the molten metal flows into the casting cavity 110 through the pouring system 120 to achieve the casting molding of the valve body.
[0018] like Figure 1As shown, the structural principle of the pouring system 120 includes: a plurality of cross gates 121 are opened on the side of the fixed mold plate 100, and the molten metal flows in from the cross gate 121; the cross gate 121 is connected to the main channel 122, and a plurality of branch channels 123 are formed on the main channel 122, and the branch channels 123 divide the inflowing molten metal into several parts, and send them to different positions on the side of the casting mold cavity 110 respectively; a casting grid 124 is formed at the end of the branch channel 123, and a push rod block will be formed on the casting grid 124 after the valve body is cooled and formed; a push rod hole 125 is formed on the bottom of the casting grid 124 on the fixed mold plate 100, and the push rod hole 125 cooperates with the push rod on the equipment machine tool. After the valve body is formed, the push rod pushes the push rod block upward, thereby driving the entire valve body to be demoulded; an inner gate 126 is opened between the casting grid 124 and the casting mold cavity 110, and the molten metal flows into the casting mold cavity 110 through the inner gate 126.
[0019] To further illustrate, arc-shaped transition connections are formed at the connections between the branch channel 123 and the pouring grid 124 , between the pouring grid 124 and the inner gate 126 , and between the inner gate 126 and the casting cavity 110 . The arc-shaped transition connection in the pouring and discharging system 120 makes it less likely for the molten metal to be trapped in the runner in the pouring and discharging system 120 .
[0020] The positioning groove 130 is semi-cylindrical as a whole and is opened on the other side of the fixed template 100. It is staggered with the casting cavity 110 and the pouring system 120. A plurality of positioning holes 131 are opened at the bottom of the positioning groove 130. The fixed template 100 is fixed on the equipment machine tool through the positioning holes 131. The number of positioning holes 131 should be no less than 3, so that the fixed template 100 will not vibrate or move after being fixed, thereby ensuring the stability and uniformity of the valve body molding.
[0021] like Figure 1 to Figure 2 As shown, the mold cavity 110 includes an upper mold cavity 111 and a lower mold cavity 112, and the lower mold cavity 112 is provided with a mold hole 113 in the middle section, and a first protrusion 114 is formed between the mold hole 113 and the upper mold cavity 111, and a second protrusion 115 is formed between the mold hole 113 and the inner gate 126. In the existing traditional valve body mold, the first protrusion 114 and the second protrusion 115 are connected structures, while the utility model is provided with an air hole groove 116 between the first protrusion 114 and the second protrusion 115, which can effectively solve the problem of easy air trapping after the molten metal flows into the mold cavity 110, avoids the appearance of air bubbles in the cast valve body, and improves the qualified rate of valve body product production from the traditional 40% to 90%, greatly improving the qualified rate of valve body production, reducing production costs, and improving production efficiency.
[0022] Further explanation is that arc-shaped transition connections are formed between the upper cavity 111 and the first protrusion 114, between the inner gate 126 and the second protrusion 115, and between the first protrusion 114, the second protrusion 115, the air hole groove 116 and the mold hole 113. The arc-shaped transition connection in the mold cavity 110 makes it difficult for the molten metal to be trapped in the mold cavity 110, thereby ensuring the production quality of the valve body molding in the mold cavity 110.
[0023] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
[0024] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.
Claims
1. A valve body air hole modification mold, comprising a fixed mold plate (100), characterized in that: A casting mold cavity (110), a pouring system (120) and a positioning groove (130) are formed on the fixed mold plate (100), and molten metal flows into the casting mold cavity (110) through the pouring system (120); The structural principle of the pouring system (120) is as follows: a plurality of horizontal gates (121) are provided on the side of the fixed mold plate (100); molten metal is injected through the horizontal gates (121) and flows into a main channel (122); a plurality of branch channels (123) are formed on the main channel (122); a pouring grid (124) is formed at the end of the branch channel (123); an inner gate (126) is provided between the pouring grid (124) and the mold cavity (110); and molten metal flows into the mold cavity (110) through the inner gate (126); The casting mold cavity (110) comprises an upper mold cavity (111) and a lower mold cavity (112); the lower mold cavity (112) is provided with a casting hole (113) at the middle section; a first protrusion (114) is formed between the casting hole (113) and the upper mold cavity (111); a second protrusion (115) is formed between the casting hole (113) and the upper mold cavity (111); and an air hole groove (116) is provided between the first protrusion (114) and the second protrusion (115); and a positioning groove (130) is provided on the other side of the fixed mold plate (100).
2. A valve body pore modification mold according to claim 1, characterized in that: A push rod hole (125) is formed on the fixed mold plate (100) at the bottom of the casting grid (124).
3. A valve body pore modification mold according to claim 1, characterized in that: Arc-shaped transition connections are formed at the connection points between the flow channel (123) and the pouring grid (124), between the pouring grid (124) and the inner gate (126), and between the inner gate (126) and the casting cavity (110).
4. A valve body pore modification mold according to claim 1, characterized in that: Arc-shaped transition connections are formed between the upper cavity (111) and the first protrusion (114), between the inner gate (126) and the second protrusion (115), and between the first protrusion (114), the second protrusion (115), the air hole groove (116) and the casting hole (113).
5. A valve body pore modification mold according to claim 1, characterized in that: A plurality of positioning holes (131) are formed at the bottom of the positioning groove (130), and the number of the positioning holes (131) should be no less than 3.