A four-part mold ring positioning anti-deviation coated sand casting mold

Abstract

The present application relates to the technical field of casting mold, provide a kind of four-part mold ring positioning anti-deviation precoated sand casting mold, including center mold component and four side mold plates, side mold plate is slidably connected with mounting frame by first guide sliding structure;Mounting frame is equipped with linkage driving structure, linkage rod transmission is formed by screw, slider and enclosure square, drive four side mold plates synchronous linear opening and closing, ensure that the top plate of side mold plate and the bottom plate are accurately inserted into positioning slot when closing mold, effectively eliminate ring positioning deviation.Mold lower is equipped with support ring and height adjusting assembly, cooperate with position sensor and control system, can automatically control support ring to accurately lift casting bottom upwards in opening mold process.The present application is compact in structure, and multistage guide sliding structure ensures the stability of side mold plate movement, and has automatic demolding support function, effectively reduces the scrap rate, improves precoated sand casting yield and production efficiency.

Description

Technical Field

[0001] This invention relates to the field of casting mold technology, and in particular to a four-part mold with circumferential positioning and anti-displacement coated sand casting mold. Background Technology

[0002] Coated sand casting is a widely used process in the production of precision metal castings. It involves heating and solidifying coated sand to form a high-precision shell (sand shell) or sand core. During the casting process, the mold's closing accuracy and opening and closing stability directly determine the dimensional tolerances and surface quality of the casting.

[0003] Currently, the industry commonly uses a four-part mold (i.e., four side mold plates surrounding the casting) structure for casting complex or large ring-shaped or columnar castings. However, traditional four-part molds often use independent hydraulic cylinders or air cylinders to drive each side mold plate separately. Due to fluctuations in pipeline pressure or accumulated clearance in connecting rods, the four side mold plates are prone to asynchronous displacement during movement. When the mold is closed, this can easily cause mold misalignment (i.e., circumferential positioning deviation) and lead to out-of-tolerance mold cavity dimensions, reducing the yield of castings.

[0004] Therefore, it is necessary to design a four-part circumferential positioning anti-displacement coated sand casting mold to solve the problems existing in the above-mentioned prior art. Summary of the Invention

[0005] The present invention aims to provide a four-part mold with circumferential positioning and anti-displacement coated sand casting mold.

[0006] This invention provides a four-part circumferential positioning anti-displacement coated sand casting mold, including a central mold assembly and a side mold assembly. The side mold assembly includes four side templates, which together with the central mold assembly form a casting cavity, and are provided with a casting port and an venting port communicating with the casting cavity. Each of the side templates is slidably connected to the mounting frame via a first guide slide structure. The mounting frame is provided with a linkage drive structure, which drives the four side templates to move synchronously in a straight line toward or away from the central mold assembly, so as to form the casting cavity or split the casting cavity.

[0007] According to the present invention, a four-part mold with circumferential positioning and anti-displacement coated sand casting mold is provided. The linkage drive structure includes four sliders that correspond one-to-one with the side templates and move in the same direction. The sliders are slidably connected to the mounting frame through a second guide structure and connected to the corresponding side templates through connecting rods. One of the sliders is connected to a power component, which is mounted on the mounting frame. A linkage rod is slidably passed through adjacent sliders, and the four linkage rods enclose a square structure.

[0008] According to the present invention, a four-part circumferential positioning anti-displacement coated sand casting mold is provided, wherein the power assembly includes a rotary drive component disposed on the mounting frame, the output shaft of the rotary drive component is poweredly connected to one end of a lead screw, the lead screw is rotatably connected to the mounting frame; an adjusting nut is threaded on the lead screw, and the adjusting nut is connected to the corresponding slider.

[0009] The four-part circumferential positioning anti-displacement coated sand casting mold provided by the present invention further includes a third guide slide structure. The linkage rod is slidably connected to the mounting frame through the third guide slide structure, and its sliding direction is perpendicular to the corresponding side of the square structure.

[0010] According to the present invention, a four-part circumferential positioning anti-displacement coated sand casting mold further includes a support ring disposed below the casting mold cavity. The support ring is connected to a height adjustment component to support the bottom of the casting during the splitting process of the casting mold cavity.

[0011] According to the present invention, a four-part circumferential positioning anti-displacement coated sand casting mold is provided, wherein the height adjustment component includes a connecting frame connected to the bottom of the support ring, the middle part of the connecting frame is connected to the moving end of the lifting component, and the lifting component is disposed on the base.

[0012] According to the present invention, a four-part circumferential positioning anti-displacement coated sand casting mold further includes a plurality of telescopic components, which are spaced apart and arranged around the periphery of the lifting component; one end of each telescopic component is connected to the connecting frame and the other end is connected to the base.

[0013] According to the present invention, a four-part mold with circumferential positioning and anti-displacement coated sand casting mold is provided. The first guide slide structure includes a connecting block fixedly connected to the side template. A guide slide rod is slidably passed through the connecting block, and the end of the guide slide rod is connected to the mounting frame.

[0014] According to the present invention, a four-part mold circumferential positioning anti-displacement coated sand casting mold is provided, wherein the second guide slide structure includes a tenon block fixed on the bottom surface of the slider, the tenon block being slidably connected to a tenon groove, and the tenon groove being fixedly connected to the mounting bracket.

[0015] According to the present invention, a four-part mold circumferential positioning anti-displacement coated sand casting mold is provided, wherein the third guide slide structure includes a guide slide groove formed on the mounting frame, the length direction of the guide slide groove is perpendicular to the corresponding side of the square structure, a guide slide member is slidably connected in the guide slide groove, and the top of the guide slide member is connected to the corresponding linkage rod.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: This invention, by setting up a linkage drive structure, requires only one power source to drive the four side templates to move synchronously towards or away from the central mold assembly along a straight line. This linkage drive structure effectively eliminates the phase difference and asynchrony problems caused by traditional multiple independent drives, ensuring that the four side templates can simultaneously and accurately surround the central mold assembly when the mold is closed, improving the circumferential positioning accuracy of the mold and thus improving the yield of castings.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural schematic diagram of a four-part mold circumferential positioning anti-displacement coated sand casting mold provided in an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the center module assembly and the side module assembly provided in an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the mounting bracket and the first guide slide structure provided in an embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the linkage drive structure provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of another three-dimensional structure of a four-part mold circumferential positioning anti-displacement coated sand casting mold provided in an embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the support ring and height adjustment assembly provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of another three-dimensional structure of the support ring and height adjustment assembly provided in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Central mold assembly; 101. Central body; 102. Fixing frame; 103. Positioning groove; 2. Side mold assembly; 21. Side template; 211. Side plate; 212. Top plate; 213. Bottom plate; 3. Pouring port; 4. Vent; 5. First guide slide structure; 51. Connecting block; 52. Guide slide rod; 6. Mounting frame; 7. Linkage drive structure; 71. Slider; 72. Second guide slide structure; 721. Tenon block; 722. Tenon groove; 73. Connecting rod; 74. Power assembly; 741. Rotation drive component; 742. Lead screw; 743. Adjusting nut; 75. Linkage rod; 76. Third guide slide structure; 761. Guide slide groove; 762. Guide slide component; 8. Support ring; 9. Height adjustment assembly; 91. Connecting frame; 92. Lifting component; 93. Telescopic component; 10. Base. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example This invention provides a four-part circumferential positioning anti-displacement coated sand casting mold. Please refer to [link / reference]. Figures 1-7 The system includes a central mold assembly 1 and a side mold assembly 2. The side mold assembly 2 includes four side templates 21. The four side templates 21 and the central mold assembly 1 together form a casting cavity, and a casting port 3 and an exhaust port 4 are reserved to communicate with the casting cavity. Each side template 21 is slidably connected to the mounting frame 6 through a first guide sliding structure 5. The mounting frame 6 is provided with a linkage drive structure 7. The linkage drive structure 7 drives the four side templates 21 to move in a straight line synchronously toward or away from the central mold assembly 1 to form a casting cavity or to split the casting cavity.

[0023] In this embodiment, the central mold assembly 1 includes a central body 101, which is fixed to the mounting frame 6 by a fixing frame 102. Positioning grooves 103 are fixed at the upper and lower ends of the central body 101, respectively. The side molds 21 are metal mold sleeves made of high-strength cast steel or ductile iron. A coated sand shell layer is fixed on the inner wall forming surface of the metal mold sleeve. Specifically, each side mold 21 includes a side plate 211. A top plate 212 and a bottom plate 213 are fixed at the upper and lower ends of the side plate 211, respectively. The ends of the top plate 212 and the bottom plate 213 correspond to and are adapted to the positioning grooves 103. High-temperature resistant sealing strips are embedded in the splicing surfaces of the side plates 211, top plates 212, and bottom plates 213 of adjacent metal mold sleeves through sealing grooves. By setting high-temperature resistant sealing strips on the splicing surfaces of adjacent side molds 21, and cooperating with the precise insertion of the ends of the top plate 212 and the bottom plate 213 into the positioning grooves 103 of the central body 101 when the mold is closed, the overall sealing performance in the mold-closed state is effectively improved.

[0024] The pouring port 3 and the venting port 4 are respectively set on the top plate 212 of the metal mold sleeve, and the pouring port 3 and the venting port 4 penetrate the metal mold sleeve and the film-coated sand shell layer of its inner wall, and are connected to the final formed pouring mold cavity.

[0025] The first guide slide structure 5 includes a connecting block 51 fixedly connected to the side template 21, and a guide slide rod 52 slidably passes through the connecting block 51. The end of the guide slide rod 52 is fixedly connected to the mounting frame 6.

[0026] Furthermore, the linkage drive structure 7 includes four sliders 71 that correspond one-to-one with the side templates 21 and move in the same direction. The sliders 71 are slidably connected to the mounting frame 6 through the second guide structure 72 and fixedly connected to the corresponding side templates 21 through the connecting rods 73. One of the sliders 71 is connected to the power component 74, which is mounted on the mounting frame 6. The adjacent sliders 71 are slidably connected to the linkage rods 75, and the four linkage rods 75 form a square structure.

[0027] In this embodiment, the power assembly 74 includes a rotary drive component 741 mounted on the mounting bracket 6. The output shaft of the rotary drive component 741 is poweredly connected to one end of the lead screw 742, and the lead screw 742 is rotatably connected to the mounting bracket 6. An adjusting nut 743 is threaded onto the lead screw 742, and the adjusting nut 743 is fixedly connected to the corresponding slider 71.

[0028] Specifically, the rotary drive component 741 is configured as a motor with a self-locking function, and the fixed end of the rotary drive component 741 is fixed on the mounting bracket 6. The second guide slide structure 72 includes a tenon block 721 fixed on the bottom surface of the slider 71. The tenon block 721 is slidably connected to the tenon groove 722, and the tenon groove 722 is fixedly connected to the mounting bracket 6.

[0029] Furthermore, it also includes a third guide slide structure 76, through which the linkage rod 75 is slidably connected to the mounting bracket 6, and its sliding direction is perpendicular to the corresponding side of the square structure.

[0030] In this embodiment, the third guide slide structure 76 includes a guide slide groove 761 formed on the mounting bracket 6. The length direction of the guide slide groove 761 is perpendicular to the corresponding side of the square structure. A guide slide member 762 is slidably connected in the guide slide groove 761. The top of the guide slide member 762 is fixedly connected to the corresponding linkage rod 75.

[0031] When the rotary drive component 741 drives the lead screw 742 to rotate, the lead screw 742 drives the corresponding slider 71 to move through the adjusting nut 743. When the slider 71 moves, it will drive the other sliders 71 to move through the linkage rod 75. Under the action of the first guide slide structure 5, the second guide slide structure 72 and the third guide slide structure 76, the four side templates 21 move synchronously towards or away from the central body 101. When the ends of the bottom plate 213 and the top plate 212 are respectively inserted into the corresponding positions of the positioning groove 103, they together form a casting mold cavity. Casting can be carried out through the casting port 3. During the process, exhaust is vented outward through the exhaust port 4 to facilitate the smooth progress of the casting work.

[0032] Furthermore, it also includes a support ring 8 located below the casting mold cavity. The support ring 8 is connected to the height adjustment component 9 so as to support the bottom of the casting during the disassembly of the casting mold cavity.

[0033] In this embodiment, when the casting needs to be demolded after a period of time, the rotation drive component 741 is controlled and its output shaft is reversed, which drives the four sliders 71 and the corresponding side templates 21 to move away from the center body 101 synchronously. During the movement, when the bottom plate 213 has not completely separated from the bottom surface of the casting and no longer interferes with the support ring 8, the height adjustment component 9 drives the support ring 8 to move upward, which can support the bottom of the casting.

[0034] Specifically, the height adjustment component 9 includes a connecting frame 91 fixedly connected to the bottom of the support ring 8, the middle part of the connecting frame 91 being fixedly connected to the actuating end of the lifting component 92, and the lifting component 92 being fixedly mounted on the base 10; the lifting component 92 can be configured as a cylinder, a hydraulic cylinder, or a servo electric cylinder.

[0035] Preferably, the present invention further includes a position detection component, which includes a side mold position sensor and a lifting position sensor. The side mold position sensor is disposed beside the movement path of the mounting frame 6 or the side template 21 and is used to detect the displacement of the side template 21 away from the central mold assembly 1. The lifting position sensor is disposed beside the movement path of the support ring 8 or the connecting frame 91 and is used to detect the lifting height position of the support ring 8. The signal output terminals of both the side mold position sensor and the lifting position sensor are connected to the electrical signal of the control system. The position sensor can be any one of a proximity switch, a photoelectric sensor, or a linear displacement sensor.

[0036] Furthermore, it also includes multiple telescopic components 93, which are spaced apart around the lifting component 92; one end of the telescopic component 93 is connected to the connecting frame 91, and the other end is connected to the base plate 213.

[0037] Specifically, the telescopic component 93 is configured as a telescopic rod that can extend and retract within a certain range. The telescopic end of the telescopic rod is fixedly connected to the connecting frame 91, and the fixed end of the telescopic rod is fixedly connected to the base 10. When the lifting component 92 drives the connecting frame 91 and the support ring 8 to move, the telescopic rod extends and retracts synchronously, which can improve the stability when adjusting the height of the support ring 8.

[0038] Based on the above structure, the operation method of the four-part circumferential positioning anti-displacement coated sand casting mold in actual use according to this embodiment includes the following steps: Step S1: In the initial state, the four side templates 21 are in the open position away from the central template assembly 1 under the drive of the linkage drive structure 7; the control system starts the power assembly 74, specifically starts the rotary drive component 741, so that its output shaft rotates in the positive direction, driving the lead screw 742 to rotate; through the threaded engagement of the lead screw 742 and the adjusting nut 743, the slider 71 connected thereto moves linearly towards the center along the second guide slide structure 72.

[0039] Step S2: As the slider 71 moves, it pushes the other three sliders 71 to move synchronously towards the center through four linkage rods 75 that form a square structure. During this process, the four linkage rods 75 slide relative to each other along the guide grooves 761 of the third guide structure 76, and drive the four sliders 71 and the connecting rods 73 to move synchronously. The connecting rods 73 push the corresponding side templates 21, so that they move smoothly and simultaneously towards the central body 101 under the guidance of the guide rods 52 of the first guide structure 5. When the ends of the top plate 212 and bottom plate 213 of the side templates 21 are fully inserted into the corresponding positioning grooves 103 at the upper and lower ends of the central body 101, the four side templates 21 and the central body 101 surround each other to form a casting cavity, and the pouring port 3 and the vent 4 are connected to the casting cavity. At this time, the rotary drive component 741 stops operating and uses its self-locking function to maintain the mold-closed state.

[0040] Step S3: High-temperature molten metal is injected from the pouring port 3 into the casting mold cavity formed by the coating sand shell layer through external equipment. During the injection process, the gas inside the casting mold cavity is discharged through the exhaust port 4. Then, it is left to stand and wait for the molten metal to cool and solidify in the coating sand shell mold to form a casting.

[0041] Step S4: After the casting has solidified, the control system controls the rotary drive component 741 to reverse, causing the lead screw 742 to rotate in the opposite direction, which in turn pulls the adjusting nut 743 and the corresponding slider 71 to move away from the center. Through the linkage rod 75, the other three sliders 71 move outward synchronously, thereby causing the four side templates 21 to move away from the central body 101 and be disassembled. During the process of the side templates 21 retracting outward, the side template position sensor detects the position of the side templates 21 in real time. When the side template position sensor reports that the displacement of the side templates 21 reaches the preset demolding threshold (the bottom of the base plate 213 has not completely separated from the bottom surface of the casting, and the base plate 213 and the support ring 8 below no longer have spatial interference), the control system sends a lifting command to the height adjustment component 9.

[0042] Step S5: After receiving the command, the lifting component 92 moves upward and drives the support ring 8 to move upward. At the same time, the lifting position sensor monitors the rising height of the support ring 8 in real time. When the support ring 8 rises to the preset lifting height (i.e., the set position to support the bottom of the casting), the lifting position sensor sends a stop signal, and the control system immediately stops the lifting component 92, so that the support ring 8 is kept in the accurate position to stably support the bottom of the casting.

[0043] Step S6: The side template 21 is fully retracted to the initial open position, and the worker or robot arm takes out the casting. Then, the control system controls the lifting component 92 to retract, which drives the support ring 8 to return to its original position. The telescopic component 93 retracts synchronously, thus completing one pouring cycle.

[0044] This invention provides a support ring driven by a lifting component and multiple telescopic components below the casting mold cavity. Combined with a position sensor and control system, it achieves precise lifting and stable support of the bottom of the casting during mold opening, effectively preventing the casting from falling due to gravity or being damaged by the side mold during demolding, thus reducing the scrap rate.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A four-part circumferential positioning anti-displacement coated sand casting mold, characterized in that, It includes a central mold assembly (1) and a side mold assembly (2). The side mold assembly (2) includes four side templates (21). The four side templates (21) together with the central mold assembly (1) form a casting mold cavity, and a casting port (3) and an exhaust port (4) are reserved to communicate with the casting mold cavity. Each of the side templates (21) is slidably connected to the mounting frame (6) through the first guide slide structure (5). The mounting frame (6) is provided with a linkage drive structure (7). The linkage drive structure (7) drives the four side templates (21) to move in a straight line synchronously toward or away from the central mold assembly (1) to form the casting cavity or to split the casting cavity.

2. The four-part circumferential positioning anti-displacement coated sand casting mold according to claim 1, characterized in that, The linkage drive structure (7) includes four sliders (71) that correspond one-to-one with the side templates (21) and move in the same direction. The sliders (71) are slidably connected to the mounting frame (6) through the second guide structure (72) and connected to the corresponding side templates (21) through the connecting rods (73). One of the sliders (71) is connected to the power component (74), which is mounted on the mounting frame (6). The adjacent sliders (71) are slidably connected to a linkage rod (75), and the four linkage rods (75) form a square structure.

3. The four-part circumferential positioning anti-displacement coated sand casting mold according to claim 2, characterized in that, The power assembly (74) includes a rotary drive component (741) disposed on the mounting bracket (6). The output shaft of the rotary drive component (741) is poweredly connected to one end of a lead screw (742). The lead screw (742) is rotatably connected to the mounting bracket (6). An adjusting nut (743) is threaded onto the lead screw (742). The adjusting nut (743) is connected to the corresponding slider (71).

4. A four-part circumferential positioning anti-displacement coated sand casting mold according to claim 2, characterized in that, It also includes a third guide slide structure (76), through which the linkage rod (75) is slidably connected to the mounting bracket (6), and its sliding direction is perpendicular to the corresponding side of the square structure.

5. A four-part circumferential positioning anti-displacement coated sand casting mold according to claim 1, characterized in that, It also includes a support ring (8) disposed below the casting mold cavity, the support ring (8) being connected to the height adjustment assembly (9) to support the bottom of the casting through the support ring (8) during the disassembly of the casting mold cavity.

6. A four-part circumferential positioning anti-displacement coated sand casting mold according to claim 5, characterized in that, The height adjustment assembly (9) includes a connecting frame (91) connected to the bottom of the support ring (8), the middle part of the connecting frame (91) being connected to the moving end of the lifting component (92), and the lifting component (92) being mounted on the base (10).

7. A four-part circumferential positioning anti-displacement coated sand casting mold according to claim 6, characterized in that, It also includes a plurality of telescopic components (93), which are spaced apart around the periphery of the lifting component (92); one end of each telescopic component (93) is connected to the connecting frame (91), and the other end is connected to the base (10).

8. A four-part circumferential positioning anti-displacement coated sand casting mold according to claim 1, characterized in that, The first guide structure (5) includes a connecting block (51) fixedly connected to the side template (21), and a guide rod (52) is slidably passed through the connecting block (51). The end of the guide rod (52) is connected to the mounting bracket (6).

9. A four-part circumferential positioning anti-displacement coated sand casting mold according to claim 2, characterized in that, The second guide structure (72) includes a tenon (721) fixed to the bottom surface of the slider (71), the tenon (721) being slidably connected to the tenon (722), and the tenon (722) being fixedly connected to the mounting bracket (6).

10. A four-part circumferential positioning anti-displacement coated sand casting mold according to claim 4, characterized in that, The third guide slide structure (76) includes a guide slide groove (761) opened on the mounting bracket (6). The length direction of the guide slide groove (761) is perpendicular to the corresponding side of the square structure. A guide slide member (762) is slidably connected in the guide slide groove (761). The top of the guide slide member (762) is connected to the corresponding linkage rod (75).

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