A core pulling mechanism

Abstract

The utility model relates to a core pulling mechanism relates to the field of aluminum alloy die casting, and the core pulling mechanism includes the mould frame and the core pulling oil cylinder fixed in one side of mould frame still includes core pulling and core pulling connecting rod, one end of core pulling connecting rod with the piston rod of core pulling oil cylinder is detachably connected, the other end of core pulling connecting rod stretches into the mould frame guide hole of mould frame, and with one end of core pulling is detachably connected, the other end of core pulling has core pulling forming part. The utility model has the beneficial effects that: core pulling oil cylinder is connected with core pulling through core pulling connecting rod, and the length of core pulling is shortened, and the core pulling manufacturing period is reduced, and the single piece core pulling manufacturing cost is reduced, and the maintenance cost is reduced. Meanwhile, because the length of core pulling is shortened, the abrasion caused by its gravity is weakened, the replacement frequency is reduced, and the service life is increased.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy die casting, and specifically to a core-pulling mechanism. Background Technology

[0002] In the die casting process, due to the presence of oil passages or threaded holes on the sidewalls of the product, and the presence of undercuts in the mold opening direction, demolding is not possible. Pre-casting can be achieved by pulling the core before mold opening using a core-pulling structure. The commonly used core-pulling structure is to directly connect the core-pulling mechanism with a hydraulic cylinder.

[0003] The existing core-pulling structure has the following drawbacks: the core is relatively long, the processing is complex, the manufacturing cycle is long, the unit manufacturing cost is high, and the maintenance cost is high. Furthermore, due to the length of the core, the coaxiality between the core and the hydraulic cylinder cannot be guaranteed. In addition, the wear of the mating section of the core is more severe due to the gravity of the core, resulting in a reduced core life, more frequent replacement, and higher maintenance costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to reduce the cost of core extraction.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A core-pulling mechanism includes a mold frame and a core-pulling cylinder fixed to one side of the mold frame, and also includes a core-pulling mechanism and a core-pulling connecting rod. One end of the core-pulling connecting rod is detachably connected to the piston rod of the core-pulling cylinder, and the other end of the core-pulling connecting rod extends into the mold frame guide hole of the mold frame and is detachably connected to one end of the core-pulling mechanism. The other end of the core-pulling mechanism has a core-pulling forming part.

[0006] The beneficial effects of this invention are: the core-pulling cylinder is connected to the core-pulling mechanism via a core-pulling connecting rod, which shortens the core-pulling length, reduces the core-pulling manufacturing cycle, lowers the cost of producing a single core-pulling unit, and reduces maintenance costs. Simultaneously, due to the shortened core-pulling length, wear caused by gravity is reduced, decreasing the replacement frequency and increasing service life.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, a core-pulling limiting block is fixedly embedded on the mold frame, and the other end of the core-pulling connecting rod slides through the core-pulling limiting block and extends into the mold frame guide hole of the mold frame. The end face of the core-pulling limiting block forms a core-pulling limiting surface, and one end of the core-pulling connecting rod has a connecting rod limiting surface that abuts against or separates from the core-pulling limiting surface.

[0009] The beneficial effects of adopting the above-mentioned further solution are: the core-pulling limiting block is used to slide and limit the core-pulling connecting rod. When the core is inserted into the molding cavity in the main mold, the connecting rod limiting surface at one end of the core-pulling connecting rod abuts against the core-pulling limiting surface of the core-pulling limiting block.

[0010] Furthermore, the other end of the core-pulling connecting rod is a cylindrical rod, and the side wall of the cylindrical rod is machined with a flat square plane parallel to its axis. The core-pulling limiting block has a limiting hole that is adapted to and slidably fitted with the cross-sectional shape of the core-pulling connecting rod, and the mold frame guide hole is a cylindrical hole.

[0011] The advantages of adopting the above-mentioned further solution are: the guide hole of the mold frame is a circular through hole, which facilitates processing and precision control; the core-pulling connecting rod and the core-pulling limiting block are guided by a flat square plane, which facilitates control of the guide fit clearance and avoids the rotation of the core-pulling connecting rod.

[0012] Furthermore, a core-pulling connecting rod has a core-pulling hook groove in the middle of its top surface at the other end, and a first U-shaped groove communicating with the core-pulling hook groove at the other end face. The core-pulling rod includes a core-pulling platform and a core-pulling rod body connected in sequence. The diameter of the core-pulling platform is larger than the diameter of the core-pulling rod body, and the diameter of the core-pulling platform is larger than the width of the first U-shaped groove. The core-pulling platform is located in the core-pulling hook groove, and the core-pulling rod body passes through the first U-shaped groove.

[0013] The advantages of adopting the above-mentioned further solution are: the core-pulling connecting rod and the core are connected by the mounting structure, making installation and replacement convenient. During the push-pull core-pulling process, the core-pulling connecting rod mainly applies axial force, and the core has a certain degree of freedom of vertical movement. During the core-pulling operation, the core can float with the hole in the main mold, reducing core wear.

[0014] Furthermore, the single-sided gap between the core-pulling connecting rod and the mold frame guide hole is smaller than the single-sided gap between the core-pulling platform and the core-pulling mounting groove.

[0015] The beneficial effects of adopting the above-mentioned further solution are as follows: the core pulling process is enhanced by adding a core pulling connecting rod, which is guided by the mold frame. The gap between the core pulling connecting rod and the mold frame is controlled (for example, a single-sided gap of 0.1-0.2mm), so that the friction force originally experienced by the core pulling is transferred to the core pulling connecting rod. Furthermore, the single-sided gap of the core pulling platform on the core pulling connecting rod is 0.5mm, which is greater than the single-sided gap between the core pulling connecting rod and the mold frame. This ensures better free guidance during the core pulling process, reduces core pulling wear, and improves the lifespan of the core pulling process.

[0016] Furthermore, the core-pulling mechanism also includes a fine core cooling assembly. A cooling hole is provided inside the core-pulling mechanism. The cooling hole extends from one end face of the core-pulling mechanism into the core-pulling forming part, and the fine core cooling assembly extends into the cooling hole.

[0017] The beneficial effects of adopting the above-mentioned further solution are: adding a fine core cooling component inside the core pulling process can better balance the core pulling temperature during the die casting process, reduce the risk of core sticking and tearing caused by high temperature, improve the core pulling life, and better ensure the cooling of the pre-cast hole, reduce the risk of defects such as porosity and shrinkage in the product, and improve product quality.

[0018] Furthermore, the fine core cooling assembly includes a cooling conduit and a cooling connector. The cooling connector is detachably or fixedly connected to the core-pulling connecting rod. The cooling connector is sealed to the cooling hole. One end of the cooling conduit extends into the cooling hole, and the other end of the cooling conduit communicates with the water inlet of the cooling connector. The gap between the outer wall of the cooling conduit and the cooling hole communicates with the water outlet of the cooling connector.

[0019] The beneficial effect of adopting the above-mentioned further solution is that cooling water flows into the cooling connector from the inlet and into the cooling pipe, and then flows out from one end of the cooling pipe, flows back to the cooling connector through the gap between the cooling pipe and the cooling hole, and is discharged from the outlet of the cooling connector, thereby carrying away the heat of the core and achieving cooling.

[0020] Furthermore, the core-pulling mechanism also includes a core-pulling insert. A main mold is fixedly provided inside the mold frame. The main mold has a forming cavity, and the side wall of the main mold has a core-pulling hole that communicates with the guide hole of the mold frame. The core-pulling insert is fixed inside the core-pulling hole, and the other end of the core pull passes through the core-pulling insert and extends into the forming cavity.

[0021] The beneficial effects of adopting the above-mentioned further solutions are: adding a core-pulling insert can better protect the core and improve its lifespan.

[0022] Furthermore, the core-pulling mechanism also includes a plug, which is threadedly connected to the core-pulling hole and abuts against one end of the core-pulling sleeve facing the core-pulling connecting rod.

[0023] The advantage of adopting the above-mentioned further solution is that the core-pulling sleeve can be quickly replaced through the plug.

[0024] Furthermore, a cylinder mounting groove is formed in the middle of the top surface of one end of the core-pulling connecting rod, and a second U-shaped groove communicating with the cylinder mounting groove is formed on the end face of one end of the core-pulling connecting rod. A cylinder mounting platform is fixed to the end of the piston rod. The diameter of the cylinder mounting platform is larger than the diameter of the piston rod and the diameter of the cylinder mounting platform is larger than the width of the second U-shaped groove. The cylinder mounting platform is located in the cylinder mounting groove, and the piston rod passes through the second U-shaped groove.

[0025] The beneficial effect of adopting the above-mentioned further solution is that the core-pulling connecting rod is connected to the piston rod through the hydraulic cylinder mounting plate, which facilitates the disassembly, assembly, or replacement of the core-pulling connecting rod and the core puller. Attached Figure Description

[0026] Figure 1 This is a structural diagram of a core-pulling mechanism of the present invention during core insertion; Figure 2 for Figure 1 Enlarged view of a portion at point A; Figure 3 This is a structural diagram of a core-pulling mechanism of the present invention during core extraction; Figure 4 This is a structural diagram of the core-pulling mechanism of this utility model; Figure 5 A structural diagram of the existing core-pulling mechanism during core insertion; Figure 6 This is a structural diagram of an existing core-pulling mechanism during core extraction. Figure 7 This is the original core-pulling structure diagram.

[0027] The attached diagram lists the components represented by each number as follows: 100. Original core-pulling device; 200. Product; 300. Main model; 400. Core-pulling limiting surface; 500. Mold frame; 600. Original core-pulling connector; 700. Hydraulic cylinder bracket fixing hole; 800. Core-pulling hydraulic cylinder bracket; 900. Core-pulling hydraulic cylinder; 1000. Core-pulling hydraulic cylinder fixing hole; 1. Core pulling; 101. Core pulling platform; 102. Core pulling rod body; 2. Core pulling sleeve; 3. Plug; 4. Core pulling connecting rod; 401. Core pulling mounting groove; 402. First U-shaped groove; 403. Hydraulic cylinder mounting groove; 404. Second U-shaped groove; 5. Core pulling limiting block; 6. Connecting rod flat square limiting surface; 7. Fine core cooling assembly; 701. Cooling conduit; 702. Cooling connector. Detailed Implementation

[0028] like Figures 5-7 The diagram shows an existing core-pulling mechanism. The original core-pulling mechanism 100 is a long stepped rod passing through the main mold 300 and the mold frame 500. One end of the rod is connected to the piston rod of the core-pulling cylinder 900 via the original core-pulling connector 600, and the other end extends into the main mold 300 for forming the product 200. The inner diameters of the main mold 300 and the mold frame 500 are different, thus forming a core-pulling limiting surface 400 at their interface. Figure 5As shown, when the original core puller 100 is inserted into the main mold 300, the stepped surface of the original core puller 100 abuts against the core puller limiting surface 400, thereby restricting the insertion position of the original core puller 100. The bracket connecting bolt passes through the cylinder bracket fixing hole 700 on the core puller cylinder bracket 800 and is threadedly connected to the mold frame 500, thereby fixing the core puller cylinder bracket 800. The cylinder connecting bolt passes through the core puller cylinder fixing hole 1000 on the core puller cylinder 900 and is threadedly connected to the core puller cylinder bracket 800, thereby fixing the core puller cylinder 900 to the core puller cylinder bracket 800. The core puller cylinder 900 includes a cylinder body and a piston rod. One end of the piston rod is slidably installed in the piston chamber of the cylinder body. The piston chamber has two oil ports, which alternately allow oil to enter, thus realizing the movement of the piston rod.

[0029] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0030] like Figures 1-4 As shown, this embodiment provides a core-pulling mechanism, including a mold frame 500 and a core-pulling cylinder 900 fixed to one side of the mold frame 500. It also includes a core-pulling 1 and a core-pulling connecting rod 4. One end of the core-pulling connecting rod 4 is detachably connected to the piston rod of the core-pulling cylinder 900, and the other end of the core-pulling connecting rod 4 extends into the mold frame guide hole of the mold frame 500 and is detachably connected to one end of the core-pulling 1. The other end of the core-pulling 1 has a core-pulling forming part.

[0031] The core-pulling cylinder 900 is connected to the core-pulling cylinder 1 via the core-pulling connecting rod 4, shortening the length of the core-pulling cylinder 1, reducing its manufacturing cycle, lowering the manufacturing cost per unit, and reducing maintenance costs. Simultaneously, due to the shortened length of the core-pulling cylinder 1, wear caused by gravity is reduced, decreasing the replacement frequency and increasing its service life. In one example, such as... Figure 7 As shown, the original core-pulling device 100 before the improvement had dimensions of D22.4 x 340.2 mm, and the cost per piece was 800 yuan; Figure 4 As shown, the dimensions of the improved core pull 1 are D13X156.7, and the unit production price is 200 yuan, which greatly reduces the cost.

[0032] Specifically, the core-pulling forming part refers to the external shape of the core-pulling 1 being adapted to the side hole of the product 200 to be formed, thereby enabling the side hole forming of the product 200.

[0033] The connection structure between the mold frame 500 and the core-pulling cylinder 900 is the same as the existing connection method, that is, the core-pulling cylinder 900 is fixed on the core-pulling cylinder bracket 800, and the core-pulling cylinder bracket 800 is fixed on the mold frame 500. Of course, other connection methods can also be used to fix the core-pulling cylinder 900, for example, the core-pulling cylinder 900 and the mold frame 500 are not directly connected, and both are fixed on the machine frame.

[0034] Based on the above technical solution, a core-pulling limiting block 5 is fixedly embedded on the mold frame 500, and the other end of the core-pulling connecting rod 4 slides through the core-pulling limiting block 5 and extends into the mold frame guide hole of the mold frame 500. The end face of the core-pulling limiting block 5 forms a core-pulling limiting surface 400, and one end of the core-pulling connecting rod 4 has a connecting rod limiting surface that abuts against or separates from the core-pulling limiting surface 400.

[0035] The core-pulling limiting block 5 is used to slide and limit the core-pulling connecting rod 4. When the core 1 is inserted into the molding cavity in the main mold 300, the connecting rod limiting surface at one end of the core-pulling connecting rod 4 abuts against the core-pulling limiting surface 400 of the core-pulling limiting block 5.

[0036] Based on the above technical solution, the other end of the core-pulling connecting rod 4 is a cylindrical rod, the side wall of the cylindrical rod is machined with a flat square plane parallel to its axis, the core-pulling limiting block 5 has a limiting hole that is adapted to and slidably fitted with the cross-sectional shape of the core-pulling connecting rod 4, and the mold frame guide hole is a cylindrical hole.

[0037] The mold frame guide hole is a circular through hole, which facilitates processing and precision control; the core-pulling connecting rod and the core-pulling limiting block are guided by a flat square plane, which facilitates control of the guide fit clearance and prevents the core-pulling connecting rod from rotating.

[0038] Specifically, the core-pulling connecting rod 4 is first machined into a cylindrical rod with different diameters at both ends by turning, and then a flat square plane is milled out on the cylindrical rod by milling.

[0039] Based on the above technical solutions, such as Figure 2 As shown, a core-pulling connecting rod 4 has a core-pulling hanging groove 401 in the middle of the top surface of the other end. The other end face of the core-pulling connecting rod 4 has a first U-shaped groove 402 that communicates with the core-pulling hanging groove 401. The core-pulling 1 includes a core-pulling platform 101 and a core-pulling rod body 102 connected in sequence. The diameter of the core-pulling platform 101 is larger than the diameter of the core-pulling rod body 102, and the diameter of the core-pulling platform 101 is larger than the width of the first U-shaped groove 402. The core-pulling platform 101 is located in the core-pulling hanging groove 401, and the core-pulling rod body 102 passes through the first U-shaped groove 402.

[0040] The core-pulling connecting rod 4 is connected to the core-pulling 1 via a mounting structure, facilitating installation and replacement. During the pushing and pulling process of the core-pulling 1, the core-pulling connecting rod 4 primarily applies axial force, allowing the core-pulling 1 a certain degree of vertical freedom of movement. During the core-pulling operation, the core-pulling 1 can float along the hole within the main mold 300, reducing wear. Furthermore, since both the core-pulling 1 and the core-pulling connecting rod 4 are slidably disposed within the main mold 300 and the mold frame 500, and guided by the holes within these molds, this floating connection method does not affect the implementation of the core-pulling process.

[0041] Specifically, the first U-shaped groove 402 is a U-shaped groove with the opening facing upwards, and its width refers to the distance between the two vertical side walls.

[0042] The core-pulling bracket 101 and the core-pulling rod 102 are integrally formed. Of course, they can also be formed separately and then fixedly connected, or they can be detachably connected.

[0043] Alternatively, the first U-shaped groove 402 can be a through hole opened along the axial direction of the core puller 1, with the core puller bracket 101 and the core puller rod 102 threadedly connected. During assembly, the core puller bracket 101 is placed into the core puller mounting groove 401, and the core puller rod 102 passes through the first U-shaped groove 402 and is threadedly tightened with the core puller bracket 101, thereby achieving assembly.

[0044] Based on the above technical solution, the single-sided gap between the core-pulling connecting rod 4 and the mold frame guide hole is smaller than the single-sided gap between the core-pulling platform 101 and the core-pulling mounting groove 401.

[0045] The core-pulling mechanism 1 is transitioned by adding a core-pulling connecting rod 4. The core-pulling connecting rod 4 is guided by the mold frame 500, and the gap between the core-pulling connecting rod 4 and the mold frame 500 is controlled (for example, the single-sided gap is 0.1-0.2mm). This transfers the friction force originally experienced by the core-pulling mechanism 1 to the core-pulling connecting rod 4. Furthermore, the single-sided gap between the core-pulling mechanism 1 and the core-pulling connecting rod 4 is 0.5mm, which is greater than the single-sided gap between the core-pulling connecting rod 4 and the mold frame 500. This ensures better free guidance during the core-pulling process, reduces wear on the core-pulling mechanism 1, and improves its lifespan.

[0046] Based on the above technical solution, the core pulling mechanism also includes a fine core cooling component 7. A cooling hole is provided in the core pulling 1. The cooling hole extends from one end face of the core pulling 1 into the core pulling forming part, and the fine core cooling component 7 extends into the cooling hole.

[0047] The addition of a fine core cooling component 7 inside the core puller 1 can better balance the temperature of the core puller 1 during the die casting process, reduce the risk of sticking and tearing caused by high temperature, improve the life of the core puller 1, and better ensure the cooling of the pre-cast hole, reduce the risk of defects such as porosity and shrinkage cavities in the product, and improve product quality.

[0048] Based on the above technical solution, the fine core cooling assembly 7 includes a cooling conduit 701 and a cooling connector 702. The cooling connector 702 is detachably or fixedly connected to the core-pulling connecting rod 4. The cooling connector 702 is sealed to the cooling hole. One end of the cooling conduit 701 extends into the cooling hole, and the other end of the cooling conduit 701 is connected to the water inlet of the cooling connector 702. The gap between the outer wall of the cooling conduit 701 and the cooling hole is connected to the water outlet of the cooling connector 702.

[0049] Cooling water flows into the cooling connector 702 from the inlet and into the cooling conduit 701. It then flows out from one end of the cooling conduit 701, flows back to the cooling connector 702 through the gap between the cooling conduit 701 and the cooling hole, and is discharged from the outlet of the cooling connector 702, thereby carrying away the heat of the core 1 and achieving cooling.

[0050] Specifically, such as Figure 2 As shown, the cooling hole opening is located at the end of the core-pulling platform 101, and a countersunk hole is provided at the cooling hole opening. The cooling connector 702 is inserted into the countersunk hole and sealed by a sealing ring.

[0051] Specifically, the inlet and outlet are connected to a cooling water heat exchanger via pipelines. After the cooling water is cooled by the cooling water heat exchanger, it flows from the inlet into the cooling connector 702 and into the cooling conduit 701 to cool the core 1. Then, it flows back to the cooling connector 702 through the gap between the cooling conduit 701 and the cooling hole, and is discharged from the outlet of the cooling connector 702 before entering the cooling water heat exchanger again.

[0052] The internal structure of the cooling connector 702 can be arbitrary, as long as it achieves the aforementioned goal of "the other end of the cooling conduit 701 communicating with the inlet of the cooling connector 702, and the gap between the outer wall of the cooling conduit 701 and the cooling hole communicating with the outlet of the cooling connector 702". For example, the cooling connector 702 can have a liquid guiding chamber, with both ends of the liquid guiding chamber penetrating through the two side walls of the cooling connector 702, thus forming an outlet and a return outlet that connects to the cooling hole of the core puller 1; the cooling connector 702 also has a cooling water pipe, one end of which is located in the return outlet and is fixedly connected to and communicates with the cooling conduit 701, while the other end of the cooling water pipe penetrates through the side wall of the cooling connector 702, thus forming an inlet. In this way, cooling water enters the cooling water pipe from the inlet, enters the cooling conduit 701, then flows through the gap between the cooling conduit 701 and the cooling hole, through the return outlet, into the liquid guiding chamber, and is discharged from the outlet.

[0053] Based on the above technical solution, the core-pulling mechanism also includes a core-pulling insert 2. A main mold 300 is fixedly provided inside the mold frame 500. The main mold 300 has a molding cavity, and the side wall of the main mold 300 has a core-pulling hole that communicates with the guide hole of the mold frame. The core-pulling insert 2 is fixed inside the core-pulling hole, and the other end of the core-pulling 1 passes through the core-pulling insert 2 and extends into the molding cavity.

[0054] Adding a core-pulling sleeve 2 can better protect the core and improve its lifespan.

[0055] Based on the above technical solution, the core-pulling mechanism also includes a plug 3, which is threadedly connected to the core-pulling hole and abuts against one end of the core-pulling sleeve 2 facing the core-pulling connecting rod 4.

[0056] The core-pulling insert 2 can be quickly replaced via the plug 3.

[0057] Specifically, such as Figure 2 As shown, the core-pulling sleeve 2 is positioned by abutting against the core-pulling hole (stepped hole) of the main type 300 through a stepped shaft structure, and then pressed tightly by the plug 3. When the core-pulling sleeve 2 needs to be replaced, simply unscrew the plug 3 to remove the core-pulling sleeve 2.

[0058] Based on the above technical solution, a cylinder mounting groove 403 is provided in the middle of the top surface of one end of the core-pulling connecting rod 4, and a second U-shaped groove 404 communicating with the cylinder mounting groove 403 is provided in the end face of one end of the core-pulling connecting rod 4. A cylinder mounting platform is fixed to the end of the piston rod. The diameter of the cylinder mounting platform is larger than the diameter of the piston rod and the diameter of the cylinder mounting platform is larger than the width of the second U-shaped groove 404. The cylinder mounting platform is located in the cylinder mounting groove 403, and the piston rod passes through the second U-shaped groove 404.

[0059] The core-pulling connecting rod 4 is connected to the piston rod via the hydraulic cylinder mounting plate, which facilitates the disassembly, assembly, or replacement of the core-pulling connecting rod 4 and the core-pulling rod 1.

[0060] Specifically, the connection structure between the core-pulling connecting rod 4 and the piston rod is similar to that between the core-pulling connecting rod 4 and the core-pulling rod 1. It adopts a hanging platform-type connection structure, which is convenient for disassembly and assembly. When the core-pulling connecting rod 4 and the core-pulling rod 1 are needed, it is only necessary to remove the cylinder connecting bolts in the four core-pulling cylinder fixing holes 1000.

[0061] In the description of this utility model, it should be noted that the terms "length", "width", "thickness", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0066] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A core-pulling mechanism, comprising a mold frame (500) and a core-pulling cylinder (900) fixed to one side of the mold frame (500), characterized in that, It also includes a core puller (1) and a core puller connecting rod (4). One end of the core puller connecting rod (4) is detachably connected to the piston rod of the core puller cylinder (900). The other end of the core puller connecting rod (4) extends into the mold frame guide hole of the mold frame (500) and is detachably connected to one end of the core puller (1). The other end of the core puller (1) has a core puller forming part. A core puller hanging groove (401) is opened in the middle of the top surface of the other end of the core puller connecting rod (4). The end face of the other end of the core puller connecting rod (4) has a core puller hanging groove (401) with the core puller hanging groove (401) in the middle of the top surface. The core-pulling mounting groove (401) is connected to the first U-shaped groove (402). The core-pulling (1) includes a core-pulling platform (101) and a core-pulling rod (102) connected in sequence. The diameter of the core-pulling platform (101) is larger than the diameter of the core-pulling rod (102), and the diameter of the core-pulling platform (101) is larger than the width of the first U-shaped groove (402). The core-pulling platform (101) is located in the core-pulling mounting groove (401), and the core-pulling rod (102) passes through the first U-shaped groove (402).

2. The core-pulling mechanism according to claim 1, characterized in that, A core-pulling limiting block (5) is fixedly embedded on the mold frame (500). The other end of the core-pulling connecting rod (4) slides through the core-pulling limiting block (5) and extends into the mold frame guide hole of the mold frame (500). The end face of the core-pulling limiting block (5) forms a core-pulling limiting surface (400). One end of the core-pulling connecting rod (4) has a connecting rod limiting surface that abuts against or separates from the core-pulling limiting surface (400).

3. The core-pulling mechanism according to claim 2, characterized in that, The other end of the core-pulling connecting rod (4) is a cylindrical rod. The side wall of the cylindrical rod is machined with a flat square plane parallel to its axis. The core-pulling limiting block (5) has a limiting hole that is adapted to the cross-sectional shape of the core-pulling connecting rod (4) and is slidably fitted. The mold frame guide hole is a cylindrical hole.

4. The core-pulling mechanism according to claim 1, characterized in that, The gap between the core-pulling connecting rod (4) and the mold frame guide hole is smaller than the gap between the core-pulling platform (101) and the core-pulling mounting groove (401).

5. A core-pulling mechanism according to claim 1, characterized in that, It also includes a fine core cooling assembly (7), in which a cooling hole is provided in the core pulling (1), the cooling hole extends from one end face of the core pulling (1) into the core pulling forming part, and the fine core cooling assembly (7) extends into the cooling hole.

6. A core-pulling mechanism according to claim 5, characterized in that, The fine core cooling assembly (7) includes a cooling conduit (701) and a cooling connector (702). The cooling connector (702) is detachably or fixedly connected to the core-pulling connecting rod (4). The cooling connector (702) is sealed to the cooling hole. One end of the cooling conduit (701) extends into the cooling hole, and the other end of the cooling conduit (701) is connected to the inlet of the cooling connector (702). The gap between the outer wall of the cooling conduit (701) and the cooling hole is connected to the outlet of the cooling connector (702).

7. A core-pulling mechanism according to claim 1, characterized in that, It also includes a core-pulling insert (2), a main mold (300) is fixedly provided inside the mold frame (500), the main mold (300) has a molding cavity, and the side wall of the main mold (300) has a core-pulling hole that communicates with the guide hole of the mold frame. The core-pulling insert (2) is fixed inside the core-pulling hole, and the other end of the core-pulling (1) passes through the core-pulling insert (2) and extends into the molding cavity.

8. A core-pulling mechanism according to claim 7, characterized in that, It also includes a plug (3), which is threaded to the core-pulling hole and abuts against one end of the core-pulling sleeve (2) toward the core-pulling connecting rod (4).

9. A core-pulling mechanism according to any one of claims 1-8, characterized in that, The top surface of one end of the core-pulling connecting rod (4) is provided with a cylinder mounting groove (403). The end face of one end of the core-pulling connecting rod (4) has a second U-shaped groove (404) that communicates with the cylinder mounting groove (403). The end of the piston rod is fixed with a cylinder mounting platform. The diameter of the cylinder mounting platform is larger than the diameter of the piston rod. The diameter of the cylinder mounting platform is larger than the width of the second U-shaped groove (404). The cylinder mounting platform is located in the cylinder mounting groove (403). The piston rod passes through the second U-shaped groove (404).

Images