Valve body casting mold

Abstract

The invention belongs to the technical field of casting molds, and particularly relates to a valve body casting mold. The device is mainly composed of a base cylinder base, a rotary pushing assembly, an inner mold component, an outer mold component, a pressing plate component and a fastener, all the components cooperate with one another, the rotary pushing assembly is installed at one end of the base cylinder base, and the pressing plate component is installed at the other end of the base cylinder base through the fastener; a forming cavity used for forming a ball valve body is jointly defined by the inner mold component, the outer mold component and the pressing plate component. The inner mold component and the outer mold component clamped on the inner mold component are driven to rotate synchronously by rotating the material pushing assembly, so that centrifugal casting is facilitated; casting liquid flowing into a mold cavity is continuously heated through an inner mold component in the casting process, light impurities and heavy impurities in the casting liquid can move towards the innermost side and the outermost side, a pressing plate component is subsequently disassembled, a valve body casting can be pushed out through a rotary pushing assembly, the light impurities and the heavy impurities on the surface of the valve body casting are removed through polishing and grinding, and the valve body casting quality is improved. And the product quality can be improved.

Description

Technical Field

[0001] This invention belongs to the field of casting mold technology, and specifically relates to a valve body casting mold. Background Technology

[0002] The materials and manufacturing processes of key valve components are fundamental to ensuring valve product quality. In ball valves, the valve body and ball are the key components determining the product quality. Currently, the main manufacturing processes for ball valve bodies are casting and forging. Casting processes commonly include sand casting and lost-wax casting. However, valve bodies produced using these methods often have defects such as sand holes and porosity, resulting in low density and low pressure resistance, making them suitable only for low-pressure valves. Furthermore, the consumption of sand and wax is high, and molten iron splashing from the pouring and riser processes can cause losses of 35-40%, leading to significant material waste and substantial environmental pollution. Therefore, these processes are listed as restricted areas for development. Consequently, high-pressure and ultra-high-pressure valve bodies are generally manufactured using forging to ensure their ability to withstand high pressure. However, forging involves multiple forging processes to form a solid valve body blank, which is then machined through turning and milling. This process is complex, inefficient, wasteful of materials, and costly.

[0003] To address this, patent document CN118492299B discloses a centrifugal casting mold for a ball valve body, comprising a fixed mold and a movable mold. The fixed mold is made of ordinary steel, while the movable mold is made of high-temperature resistant steel. The movable mold consists of an upper mold, a lower mold, and an inner core, and is movably installed within the cavity of the fixed mold. The left end of the inner core is fixedly embedded in a slot between the left end faces of the upper and lower molds, and the right end extends into the valve body casting cavity between the upper and lower molds. A casting hole is provided at the center of the right side of the valve body casting cavity. This centrifugal casting mold has advantages such as environmentally friendly casting process, high product density, good pressure resistance, low material consumption, high production efficiency, and low product cost.

[0004] However, this casting mold still has shortcomings. First, it cannot achieve synchronous rotation of all mold parts, which is not conducive to centrifugal casting. Second, it cannot continuously heat the molten casting flowing into the mold cavity during the casting process, which is not conducive to the displacement of light and heavy impurities in the molten casting towards the innermost and outermost directions, respectively. Therefore, it needs to be optimized and improved. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned problems existing in the conventional technology and to provide a valve body casting mold.

[0006] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0007] This invention provides a valve body casting mold, including a base cylinder seat, a rotary pusher assembly, an inner mold component, an outer mold component, a pressure plate component, and fasteners. One end of the base cylinder seat is equipped with a rotary pusher assembly for driving the axial displacement and circumferential rotation of the inner mold component. Multiple outer mold components are provided and distributed circumferentially. One end of each outer mold component is snapped onto the outside of the inner mold component, and the other end of the outer mold component abuts against the pressure plate component. The pressure plate component is detachably connected to the base cylinder seat via fasteners. The inner mold component, outer mold component, and pressure plate component together form a molding cavity for molding a ball valve body.

[0008] Furthermore, in the aforementioned valve body casting mold, the rotary pusher assembly includes a circular base plate, a slide rail, a slider, a vertical plate base, a rotary joint, a rotating shaft, a drive motor, a drive pulley, a synchronous belt, and a driven pulley. The circular base plate is fixed at one end of the base cylinder seat. A slide rail is fixed to the outer side of the circular base plate. A slider forming a linear guide pair with the slide rail is slidably mounted on the slide rail. A vertical plate base is fixed to the upper side of the slider. The vertical plate base is connected to the rotating shaft through a rotary joint. A drive motor is mounted on the outer side of the vertical plate base through a bracket. A drive pulley is mounted at the output end of the drive motor. The drive pulley is connected to the driven pulley through a synchronous belt. The driven pulley is provided with movable support by the circular base plate. The driven pulley is sleeved on the outer side of the rotating shaft, and a bonding structure is provided between the driven pulley and the rotating shaft.

[0009] Furthermore, in the aforementioned valve body casting mold, a convex key is provided on the outer side of the rotating shaft, and a keyway is provided on the inner wall of the driven pulley located in the through hole of the rotating shaft, forming a bonding structure with the convex key.

[0010] Furthermore, in the above-mentioned valve body casting mold, the inner mold component includes a turntable, an inner mold core block, a radial push rod, and a radial packing column. The outer center of the turntable is fixed to the outer end of the rotating shaft. The inner mold core block is fixed on the inner side of the turntable. A radial push rod is installed in the inner mold core block. A radial packing column is installed at the movable end of the radial push rod. The turntable has several snap-fit ​​grooves around the inner mold core block to facilitate the snap-fit ​​of the outer mold component.

[0011] Furthermore, in the above-mentioned valve body casting mold, the inner mold core block has a radial receiving groove inside to facilitate the storage of radial packing columns, the inner mold core block has an air guiding channel on the inner side wall of the radial receiving groove, the rotating shaft has a hollow cavity inside, and the rotating shaft has an air guiding hole near the turntable. The air guiding hole is connected to the air guiding channel through the hollow cavity of the rotating shaft.

[0012] Furthermore, in the aforementioned valve body casting mold, an electric heating tube is embedded in the inner mold core block near the outer surface, and a heating controller is installed on the outside of the vertical plate seat of the rotating pusher assembly. The heating controller is connected to the electric heating tube through a collector ring at the built-in rotary joint and a wire built into the hollow cavity of the rotating shaft.

[0013] Furthermore, in the above-mentioned valve body casting mold, the outer mold component includes a segmented outer module, one end of which is provided with a snap-fit ​​block that mates with the snap-fit ​​groove, and the other end of which is provided with an arc-shaped block; the inner wall of the segmented outer module of one of the outer mold components is provided with a positioning groove that mates with the radial packing column.

[0014] Furthermore, in the above-mentioned valve body casting mold, the pressure plate component includes a circular pressure plate, a casting pipe is embedded in the center of the circular pressure plate, and an annular limiting groove is provided on the inner side of the circular pressure plate to facilitate the sliding and limiting of the arc-shaped block; a number of fastening screw holes that cooperate with fasteners are provided on the outer peripheral wall of the circular pressure plate, and a number of fastening through holes that cooperate with fasteners are provided on the outer surface of the base cylinder along the circumferential direction.

[0015] The beneficial effects of this invention are:

[0016] This invention features a rational structural design, primarily composed of a base cylinder seat, a rotary pusher assembly, an inner mold component, an outer mold component, a pressure plate component, and fasteners. These components work in concert. The rotary pusher assembly is installed at one end of the base cylinder seat, and the pressure plate component is fastened to the other end. The inner mold component, outer mold component, and pressure plate component together form a molding cavity for forming the ball valve body. The rotary pusher assembly drives the inner mold component and the outer mold component, which are engaged thereon, to rotate synchronously, facilitating centrifugal casting. During the casting process, the inner mold component continuously heats the molten casting flowing into the mold cavity, causing light and heavy impurities in the casting to shift towards the innermost and outermost directions, respectively. Subsequently, the pressure plate component is disassembled, and the rotary pusher assembly pushes the valve body casting out. The innermost and outermost sides of the valve body casting are polished to remove light and heavy impurities, improving product quality.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the rotating feeding assembly in this invention;

[0021] Figure 3 This is a schematic diagram of the internal mold component in this invention;

[0022] Figure 4 This is a schematic diagram of the structure of the outer mold component in this invention;

[0023] Figure 5 This is a front view schematic diagram of the pressure plate component in this invention;

[0024] Figure 6 This is a side view of the pressure plate component in this invention;

[0025] In the attached diagram, the component numbers are as follows:

[0026] 1-Base cylinder seat;

[0027] 2-Rotary feeding assembly, 201-Circular base plate, 202-Slide rail, 203-Slider, 204-Upright plate base, 205-Rotary joint, 206-Rotating shaft, 207-Drive motor, 208-Drive pulley, 209-Synchronous belt, 210-Driven pulley, 211-Air guide hole, 212-Heating controller;

[0028] 3-Inner mold component, 301-Turntable, 302-Inner mold core block, 303-Radial push rod, 304-Radial packing column, 305-Radial receiving groove, 306-Air guide channel, 307-Snap-fit ​​groove, 308-Heating tube;

[0029] 4-Outer mold components, 401-Segmented outer module, 402-Snap-fit ​​block, 403-Arc-shaped block;

[0030] 5-Pressure plate component, 501-Circular pressure plate, 502-Pouring pipe, 503-Annular limiting groove, 504-Fasting screw hole;

[0031] 6-Fasteners. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figures 1-6As shown, this embodiment provides a valve body casting mold, characterized in that it includes a base cylinder seat 1, a rotary pusher assembly 2, an inner mold component 3, an outer mold component 4, a pressure plate component 5, and fasteners 6. A rotary pusher assembly 2 is installed at one end of the base cylinder seat 1 to drive the inner mold component 3 to axial displacement and circumferential rotation. Multiple outer mold components 4 are provided and distributed circumferentially. One end of the outer mold component 4 is snapped onto the outside of the inner mold component 3, and the other end of the outer mold component 4 abuts against the pressure plate component 5. The pressure plate component 5 is detachably connected to the base cylinder seat 1 via fasteners 6. The inner mold component 3, the outer mold component 4, and the pressure plate component 5 together form a molding cavity for molding a ball valve body.

[0034] In this embodiment, the rotary pusher assembly 2 includes a circular base plate 201, a slide rail 202, a slider 203, a vertical plate base 204, a rotary joint 205, a rotating shaft 206, a drive motor 207, a drive pulley 208, a synchronous belt 209, and a driven pulley 210. The circular base plate 201 is fixed to one end opening of the base cylinder 1. The slide rail 202 is fixed to the outer side of the circular base plate 201, and the slider 203, which forms a linear guide pair with the slide rail 202, is slidably mounted on the slide rail 202. The vertical plate base 204 is fixed to the upper side of the slider 203, and the vertical plate base 204 is connected to the rotating shaft 206 through the rotary joint 205. The drive motor 207 is mounted on the outer side of the vertical plate base 204 through a bracket. The drive pulley 208 is mounted on the output end of the drive motor 207, and the drive pulley 208 is connected to the driven pulley 210 through the synchronous belt 209. The driven pulley 210 is provided with movable support by the circular base plate 201. The driven pulley 210 is sleeved on the outside of the rotating shaft 206, and a bonding structure is provided between the driven pulley 210 and the rotating shaft 206.

[0035] In this embodiment, a convex key is provided on the outer side of the rotating shaft 206, and a keyway that forms a bonding structure with the convex key is provided on the inner wall of the driven pulley 210 located in the through hole of the rotating shaft.

[0036] In this embodiment, the inner mold component 3 includes a turntable 301, an inner mold core block 302, a radial push rod 303, and a radial packing column 304. The outer center of the turntable 301 is fixed to the outer end of the rotating shaft 206, and the inner mold core block 302 is fixed to the inner side of the turntable 301. The radial push rod 303 is installed in the inner mold core block 302, and the radial packing column 304 is installed at the movable end of the radial push rod 303. The turntable 301 has several locking grooves 307 around the inner mold core block 302 to facilitate the locking of the outer mold component 4.

[0037] In this embodiment, the inner mold core block 302 has a radial receiving groove 305 inside to facilitate the reception of radial packing columns 304, and an air guiding channel 306 is provided on the inner side wall of the radial receiving groove 305. The rotating shaft 206 has a hollow cavity inside, and an air guiding hole 211 is provided on the rotating shaft 206 near the turntable 301. The air guiding hole 211 and the convex key are located on different sides. The air guiding hole 211 communicates with the air guiding channel 306 through the hollow cavity of the rotating shaft 206.

[0038] In this embodiment, an electric heating tube 308 is embedded and installed in the inner mold core block 302 near the outer surface. A heating controller 212 is installed on the outside of the upright plate seat 204 of the rotating pusher assembly 2. The heating controller 212 is connected to the electric heating tube 308 through the collector ring at the built-in rotary joint 205 and the wire built into the cavity of the rotating shaft 206.

[0039] In this embodiment, the outer mold component 4 includes a segmented outer module 401. One end of the segmented outer module 401 is provided with a snap-fit ​​block 402 that cooperates with the snap-fit ​​groove 307, and the other end of the segmented outer module 401 is provided with an arc-shaped block 403. The inner wall of the segmented outer module 401 of one of the outer mold components 4 is provided with a positioning groove that cooperates with the radial packing column 304.

[0040] In this embodiment, the pressure plate component 5 includes a circular pressure plate 501, a casting pipe 502 is embedded in the center of the circular pressure plate 501, and an annular limiting groove 503 is provided on the inner side of the circular pressure plate 501 to facilitate the sliding and limiting of the arc-shaped block 403; a plurality of fastening screw holes 504 that cooperate with the fasteners 6 are provided on the outer peripheral wall of the circular pressure plate 501, and a plurality of fastening through holes that cooperate with the fasteners 6 are provided on the outer surface of the base cylinder 1 along the circumferential direction.

[0041] A specific application of this embodiment is as follows: This mold is mainly composed of a base cylinder 1, a rotary pusher assembly 2, an inner mold component 3, an outer mold component 4, a pressure plate component 5, and fasteners 6. The components work together. The rotary pusher assembly 2 is installed at one end of the base cylinder 1, and the pressure plate component 5 is installed at the other end of the base cylinder 1 through the fasteners 6. The inner mold component 3, the outer mold component 4, and the pressure plate component 5 together form a forming cavity for forming the ball valve body. The rotary pusher assembly 2 drives the inner mold component 3 and the outer mold component 4, which are clamped on it, to rotate synchronously, which is beneficial for centrifugal casting. The inner mold component 3 continuously heats the casting liquid flowing into the mold cavity during the casting process, which is beneficial for light impurities and heavy impurities in the casting liquid to move towards the innermost and outermost directions, respectively. Afterwards, the pressure plate component 5 is disassembled, and the valve body casting can be pushed out by the rotary pusher assembly 2. The innermost and outermost sides of the valve body casting are polished to remove light and heavy impurities, which can improve product quality.

[0042] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A valve body casting mold, characterized in that, The device includes a base cylinder seat, a rotary pusher assembly, an inner mold component, an outer mold component, a pressure plate component, and fasteners. One end of the base cylinder seat is equipped with a rotary pusher assembly for driving the axial displacement and circumferential rotation of the inner mold component. Multiple outer mold components are provided and distributed circumferentially. One end of the outer mold component is snapped onto the outside of the inner mold component, and the other end of the outer mold component abuts against the pressure plate component. The pressure plate component is detachably connected to the base cylinder seat by fasteners. The inner mold component, outer mold component, and pressure plate component together form a forming cavity for forming a ball valve body.

2. The valve body casting mold according to claim 1, characterized in that, The rotary feeding assembly includes a circular base plate, a slide rail, a slider, a vertical plate base, a rotary joint, a rotating shaft, a drive motor, a drive pulley, a synchronous belt, and a driven pulley. The circular base plate is fixed at one end of the base cylinder. A slide rail is fixed to the outer side of the circular base plate. A slider forming a linear guide pair with the slide rail is slidably mounted on the slide rail. A vertical plate base is fixed to the upper side of the slider. The vertical plate base is connected to the rotating shaft through a rotary joint. A drive motor is mounted on the outer side of the vertical plate base through a bracket. A drive pulley is mounted at the output end of the drive motor. The drive pulley is connected to the driven pulley through a synchronous belt. The driven pulley is movably supported by the circular base plate. The driven pulley is sleeved on the outer side of the rotating shaft, and a bonding structure is provided between the driven pulley and the rotating shaft.

3. The valve body casting mold according to claim 2, characterized in that, The outer side of the rotating shaft is provided with a convex key, and the driven pulley is provided with a keyway on the inner wall of the through hole of the rotating shaft, which forms a bonding structure with the convex key.

4. The valve body casting mold according to claim 3, characterized in that, The inner mold component includes a turntable, an inner mold core block, radial push rods, and radial filler columns. The outer center of the turntable is fixed to the outer end of the rotating shaft. The inner mold core block is fixed to the inner side of the turntable. A radial push rod is installed in the inner mold core block. A radial filler column is installed at the movable end of the radial push rod. The turntable has several snap-fit ​​grooves around the inner mold core block to facilitate the snap-fit ​​of the outer mold component.

5. The valve body casting mold according to claim 4, characterized in that, The inner mold core block has a radial receiving groove inside to facilitate the storage of radial packing columns. The inner mold core block has an air guiding channel on the inner side wall of the radial receiving groove. The rotating shaft has a hollow cavity inside. The rotating shaft has an air guiding hole near the turntable. The air guiding hole is connected to the air guiding channel through the hollow cavity of the rotating shaft.

6. The valve body casting mold according to claim 5, characterized in that, The inner mold core block is embedded with an electric heating tube near its outer surface. A heating controller is installed on the outside of the upright plate seat of the rotating pusher assembly. The heating controller is connected to the electric heating tube through a collector ring at the built-in rotary joint and a wire built into the hollow cavity of the rotating shaft.

7. The valve body casting mold according to claim 6, characterized in that, The outer mold component includes a segmented outer module, one end of which is provided with a snap-fit ​​block that mates with a snap-fit ​​groove, and the other end of which is provided with an arc-shaped block; the inner wall of the segmented outer module of one of the outer mold components is provided with a positioning groove that mates with a radial packing column.

8. The valve body casting mold according to claim 7, characterized in that, The pressure plate component includes a circular pressure plate, a casting pipe is embedded in the center of the circular pressure plate, and an annular limiting groove is provided on the inner side of the circular pressure plate to facilitate the sliding and limiting of the arc block; a number of fastening screw holes that cooperate with fasteners are provided on the outer peripheral wall of the circular pressure plate, and a number of fastening through holes that cooperate with fasteners are provided on the outer surface of the base cylinder along the circumferential direction.

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