Metal mold loose piece structure, auxiliary tool and metal mold aluminum alloy casting mold

Abstract

The utility model relates to the technical field of aluminum alloy casting process, in particular to a metal mold loose piece structure, an auxiliary tool and a metal mold aluminum alloy casting mold, which comprise a sand loose piece body and a plurality of rotary positioning key components, the rotary positioning key assembly is detachably connected with the mold positioning seat and is perpendicular to the mold parting surface; a plurality of rotary positioning grooves are formed in the sand loose piece body in the circumferential direction, and the rotary positioning clamping grooves and the rotary positioning key assemblies are clamped in a one-to-one correspondence and matched mode. According to the movable block structure, accurate positioning and fixing of the sand movable block body in a mold are guaranteed in a rotary positioning mode, and movable block displacement caused by factors such as vibration during mold opening and closing, reverse thrust of cavity airflow and reverse thrust of molten aluminum in the pouring process is avoided, so that the positioning stability of the sand movable block body is guaranteed, and the casting quality is guaranteed. The problems that in the prior art, a movable block is prone to displacement, the positioning accuracy of the movable block is difficult to guarantee, and the casting quality is affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy casting technology, specifically to a metal mold block structure, auxiliary tooling, and mold. Background Technology

[0002] In the design of aluminum alloy casting processes using metal molds, movable blocks are mainly used to solve the demolding problem of slightly complex parts of the casting structure that are not on the parting surface. When these parts cannot be demolded by a simple mold opening method, metal mold movable blocks are usually used. The back of the movable block is equipped with a dovetail-shaped positioning protrusion, and the mold is equipped with a concave dovetail groove that mates with the dovetail protrusion of the movable block. During production, the high-temperature movable block is manually inserted into the concave dovetail groove of the high-temperature mold for sliding and fixing. The insertion direction of the movable block must be consistent with the mold opening direction. After installation, the mold is closed and casting is performed. After casting is completed, the mold is opened, and the movable block is left on the surface of the casting. Then, a special tool for removing the movable block is used to remove it manually, and it is reinstalled into the mold for the next casting production. Throughout the entire production process, the precise positioning and fixing of the movable block has a significant impact on the dimensions, quality, and performance of the casting.

[0003] However, in the design of metal mold casting processes, castings with flanged handholes perpendicular to the parting line are often encountered. These castings typically have a large outer flange and a small neck, making direct demolding impossible within the metal mold. The only solution is to design a movable block on the outer side of the small neck to facilitate demolding. The inner surface of the movable block forms the outer contour of the small neck, and its shape matches the mold. The movable block's dimensions are designed to be larger than the diameter of the small flange, creating a draft angle for easy demolding. During mold opening, the movable block is positioned at the flange neck and manually removed. However, if a traditional dovetail-shaped movable block is used for positioning during casting production, it cannot be fixed in place. Often, during production, factors such as vibrations during mold opening and closing, the back pressure of airflow in the mold cavity, and the back pressure of molten aluminum during pouring cause the movable block to shift, making it difficult to guarantee the accuracy of the movable block's positioning and affecting casting quality. Utility Model Content

[0004] To address the problems in existing technologies where movable blocks are prone to displacement, making it difficult to ensure accurate positioning and affecting casting quality, this utility model provides a metal mold movable block structure, auxiliary tooling, and mold.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a metal mold movable block structure, including a sand movable block body and several rotary positioning key components; the rotary positioning key components are detachably connected to the mold positioning seat and are perpendicular to the mold parting surface; the sand movable block body is provided with several rotary positioning grooves in a circumferential direction, and the rotary positioning grooves are matched and engaged with the rotary positioning key components one by one.

[0007] Optionally, the sand block body is a circular ring structure, and the inner cavity of the circular ring structure is consistent with the outer surface contour of the small diameter of the casting.

[0008] Optionally, the end of the rotary positioning groove is provided with a slot, the length of which is less than the length of the rotary positioning groove and greater than the length of the rotary positioning key assembly.

[0009] Optionally, the rotary positioning key assembly includes a positioning key base detachably connected to the mold positioning seat, the positioning key base being provided with a positioning platform, and the positioning platform being provided with a mating groove and a positioning key.

[0010] Optionally, the width of the mating groove is greater than the distance from the inner end face of the rotary positioning slot to the end face of the sand block body; the thickness of the positioning key is less than or equal to the width of the rotary positioning slot.

[0011] Optionally, the inner walls of the positioning key base and the positioning platform are both arc-shaped surfaces that fit against the outer wall of the sand block body.

[0012] Optionally, the sand block body is a resin sand block body.

[0013] An auxiliary tooling for assisting in the installation of the aforementioned metal mold movable block structure includes a tooling body and a tooling handle and a rotating handle connected in sequence to the tooling body. The bottom end of the tooling body is detachably connected to the end face of the sand movable block body.

[0014] Optionally, the end face of the sand block body is provided with a plurality of pin holes, and the end face of the tooling body is provided with a plurality of pins that correspond one-to-one with the pin holes for connection.

[0015] A metal mold for casting aluminum alloy includes the aforementioned movable block structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model discloses a movable block structure for a metal mold, comprising a sand movable block body and several rotary positioning key assemblies. The rotary positioning key assemblies are detachably connected to the mold positioning seat and are perpendicular to the mold parting surface. The sand movable block body has several circumferentially arranged rotary positioning grooves, which correspond one-to-one with the rotary positioning key assemblies. This movable block structure abandons the traditional dovetail-shaped positioning protrusion method, instead employing rotary positioning key assemblies with rotary positioning grooves on the sand movable block body that connect to the mold positioning seat. This rotary positioning method ensures the precise positioning and fixation of the sand movable block body within the mold, preventing displacement caused by factors such as vibration during mold opening and closing, back pressure from airflow in the cavity, and back pressure from molten aluminum during pouring. This ensures the stability of the sand movable block body's positioning and guarantees the quality of the casting.

[0018] The sand block body has a circular ring structure. The inner cavity of the ring structure matches the outer surface contour of the small diameter of the casting, which can better adapt to the shape of the casting and improve the matching degree of the block and the precision of the casting. The circular ring structure of the sand block body is relatively simple to manufacture and process, which helps to reduce production costs and improve production efficiency.

[0019] The end of the rotary positioning groove has an opening, the length of which is less than the length of the rotary positioning groove but greater than the length of the rotary positioning key assembly. This design allows the rotary positioning key assembly to more easily enter the rotary positioning groove through the opening. During installation, the operator can first align and partially insert the rotary positioning key assembly into the rotary positioning groove through the opening, and then rotate it until it is fully engaged. This engagement method simplifies the installation and disassembly process, reduces the difficulty and complexity of operation, and improves work efficiency. At the same time, guided by the opening, the rotary positioning key assembly can gradually enter the rotary positioning groove and gradually achieve precise positioning during rotation.

[0020] The rotary positioning key assembly includes a positioning key base detachably connected to the mold positioning seat. The positioning key base has a positioning platform, and the positioning platform has a mating groove and a positioning key. The detachable connection between the positioning key base and the mold positioning seat allows for easy installation, disassembly, and replacement of the entire rotary positioning key assembly. This modular design simplifies the mold assembly and maintenance process, improving work efficiency. The mating groove on the positioning platform matches the rotary positioning groove on the sand block body, ensuring that the rotary positioning key assembly can be accurately and firmly engaged with the sand block body, improving the positioning accuracy and stability of the mold. This structure is suitable for various metal molds, especially for positioning blocks in complex casting molds, and has broad application prospects.

[0021] The width of the mating groove is greater than the distance from the inner end face of the rotary positioning slot to the end face of the sand block body; the thickness of the positioning key is less than or equal to the width of the rotary positioning slot. The design of the mating groove width being greater than the distance from the inner end face of the rotary positioning slot to the end face of the sand block body provides greater operating space for the installation of the rotary positioning key assembly, making it easier to align and insert the rotary positioning key assembly during installation, thus reducing installation difficulty and time.

[0022] The inner walls of the positioning key base and the positioning platform are both arc-shaped surfaces that fit against the outer wall of the sand block body. The arc-shaped surface design makes the contact area between the positioning key base and the positioning platform and the sand block body larger and the fit tighter. This tight fit helps to reduce positioning errors caused by size mismatch or improper installation, thereby improving the positioning accuracy of the mold block structure.

[0023] The sand block body is a resin sand block body. After the metal mold block is opened, it is easily stuck on the casting or wrapped in aluminum skin, making disassembly difficult. By using a resin sand block body, the collapsibility of the resin sand can be utilized, combined with the guidance of the rotating structure, to simplify the demolding process and improve production efficiency.

[0024] An auxiliary tooling for assisting in the installation of the aforementioned metal mold movable block structure includes a tooling body and a tooling handle and a rotating handle connected sequentially to the tooling body. The bottom end of the tooling body is detachably connected to the end face of the sand movable block body. With the auxiliary tooling, the operator only needs to stand outside the mold and use the tooling to insert the sand movable block body. During the installation of the sand movable block body, personnel maintain a safe distance from the high-temperature mold, ensuring safety and reliability.

[0025] The end face of the sand block body is provided with a number of pin holes, and the end face of the tooling body is provided with a number of pins that correspond to and are connected to the pin holes one by one. The connection between the pin holes and the pins provides a stable connection between the mold and the tooling. By inserting the pins into the pin holes, it can be ensured that the tooling body and the sand block body fit tightly together, and it is not easy to loosen or shift, thus enhancing the stability of the connection. By inserting and pulling out the pins, the connection and separation between the tooling body and the sand block body can be easily realized without the use of additional tools or complicated operating steps, thereby improving work efficiency.

[0026] This utility model provides a metal mold for aluminum alloy casting, including the above-mentioned movable block structure. This mold has higher casting precision, better mold flexibility, can flexibly meet various complex casting needs, and has good versatility and low cost. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the sand block body of a metal mold movable block structure according to this utility model at a certain angle.

[0028] Figure 2 This is a schematic diagram of the sand block body of a metal mold movable block structure according to this utility model from another angle.

[0029] Figure 3 This is a schematic diagram of one side of a rotating positioning key assembly of a metal mold movable block structure according to the present invention.

[0030] Figure 4 This is a schematic diagram of the other side of the rotating positioning key assembly of a metal mold movable block structure according to the present invention.

[0031] Figure 5 This is a schematic diagram of the auxiliary tooling structure of this utility model.

[0032] Figure 6 This is a front view of the assembly structure of the auxiliary tooling and metal mold movable block structure of this utility model.

[0033] Figure 7 This is a top view of the assembly structure of the auxiliary tooling and metal mold movable block structure of this utility model.

[0034] Figure 8 This is a horizontal view of the right-hand side view of the assembly structure of the auxiliary tooling and metal mold movable block structure of this utility model.

[0035] Figure 9 This is a bottom view of the assembly structure of the auxiliary tooling and metal mold movable block structure of this utility model.

[0036] Among them, 1-sand block body, 2-rotary positioning slot, 3-pin, 4-rotary positioning key assembly, 5-tool body, 6-tool handle, 7-rotary handle, 21-slot, 41-positioning key base, 42-positioning platform, 43-fitting slot, 44-positioning key. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the 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, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 mechanical connection or an electrical 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.

[0043] The present invention will be further described in detail below with reference to specific embodiments. The description is for explanation and not limitation of the present invention.

[0044] See Figure 1 and Figure 2 This utility model provides a metal mold movable block structure, including a sand movable block body 1 and several rotary positioning key components 4;

[0045] The sand block body 1 is a resin sand block body, and the sand block body 1 has a plurality of circumferentially arranged rotating positioning grooves 2, which are correspondingly engaged with the rotating positioning key assembly 4. Preferably, the sand block body 1 has a ring structure, and the inner cavity of the ring structure is consistent with the outer surface contour of the small diameter of the casting. The end of the rotating positioning groove 2 is provided with a slot 21;

[0046] See Figure 3 and Figure 4 The rotary positioning key assembly 4 is detachably connected to the mold positioning seat and is perpendicular to the mold parting surface. The rotary positioning key assembly 4 includes a positioning key base 41 detachably connected to the mold positioning seat 3. A positioning platform 42 is provided on the positioning key base 41. A mating groove 43 and a positioning key 44 are provided on the positioning platform 42. The width of the mating groove 43 is greater than the distance d from the inner end face of the rotary positioning slot 2 to the end face of the sand block body 1. The thickness of the positioning key 44 is less than or equal to the width c of the rotary positioning slot 2, and the length of the positioning key 44 is less than the length of the groove 21, so as to ensure that the positioning key 44 can be smoothly guided from the groove 21 into the rotary positioning slot 2 for positioning and fixing during the installation process. The inner walls of the positioning key base 41 and the positioning platform 42 are both arc-shaped surfaces that fit against the outer wall of the sand block body 1.

[0047] See Figure 5 This utility model provides an auxiliary tooling for assisting in the installation of the aforementioned metal mold movable block structure, including a tooling body 5 and a tooling handle 6 and a rotating handle 7 connected sequentially to the tooling body 5. The bottom end of the tooling body 5 is detachably connected to the end face of the sand movable block body 1. The tooling body 5 and the sand movable block body 1 can be detachably connected through tenon and mortise structures, keyway fits, pin fits, snap-fits, etc. Preferably, the end face of the sand movable block body 1 is provided with a plurality of pin holes, and the end face of the tooling body 5 is provided with a plurality of pins 3 that correspond one-to-one with the pin holes.

[0048] For its combination method, please refer to Figures 6 to 9 The installation method of this movable block structure is as follows: Before production, the rotary positioning key assembly 4 is installed in the positioning seat of the mold using bolts. During the casting production operation, an auxiliary tool is used to insert the pin 3 into the pin hole of the sand movable block body 1; holding the tool handle 6 with one hand and the rotary handle 7 with the other hand, the sand movable block body 1 is lifted up and held to a horizontal position. Figure 8 In the initial state, the sand block body 1 is sent to the mold positioning seat. Observe the dimensions of the rotating groove 2 on the sand block body 1 and the positioning key 44 to determine the insertion direction. Align the groove 21 of the rotating groove 2 on the sand block body 1 with the positioning key 44, and send the sand block body 1 into the mold positioning seat. Manually rotate the handle 7 to rotate the sand block body 1, so that the rotating groove 2 and the positioning key 44 are fully engaged. Remove the auxiliary tooling to complete the installation of the sand block body 1. The sand block body 1 is accurately positioned and will not be affected by equipment vibration, the back thrust of airflow in the cavity, or the back thrust of molten aluminum during the pouring process. After the casting production is completed, the mold is opened and the part is removed. During the mold opening, the mold opening force breaks off the positioning groove part of the sand block, realizing the mold opening. Before the next production, only the sand and gravel in the mold positioning seat need to be blown clean before the next casting production can begin. The entire sand block installation process is simple to operate and safe and reliable.

[0049] This invention provides a metal mold for aluminum alloy casting, including the aforementioned movable block structure. This mold offers higher casting precision, better mold flexibility, and can flexibly meet various complex casting needs. It also boasts good versatility and low cost.

[0050] In summary, this utility model provides a metal mold movable block structure, auxiliary tooling, and mold. This movable block structure abandons the traditional positioning method of dovetail-shaped positioning protrusions and adopts a rotating positioning key assembly 4 that connects to the mold positioning seat by setting a rotating positioning groove 2 on the sand movable block body 1. The rotating positioning method ensures the accurate positioning and fixation of the sand movable block body 1 in the mold, avoiding the displacement of the movable block caused by factors such as vibration when the mold is opened and closed, the back thrust of airflow in the cavity, and the back thrust of aluminum liquid during the pouring process. This ensures the stability of the positioning of the sand movable block body and guarantees the quality of the casting.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the technical solution of the present utility model in any way. Those skilled in the art should understand that, without departing from the spirit and principles of the present utility model, the technical solution can be modified and replaced in several simple ways, and these modifications and replacements are all within the scope of protection covered by the claims.

Claims

1. A metal mold movable block structure, characterized in that, It includes a sand block body (1) and several rotary positioning key components (4); the rotary positioning key components (4) are detachably connected to the mold positioning seat and are perpendicular to the mold parting surface; the sand block body (1) is provided with several rotary positioning slots (2) in a circumferential direction, and the rotary positioning slots (2) and the rotary positioning key components (4) are matched and engaged one by one.

2. The metal mold movable block structure according to claim 1, characterized in that, The sand block body (1) is a circular ring structure, and the inner cavity of the circular ring structure is consistent with the outer surface contour of the small diameter of the casting.

3. The metal mold movable block structure according to claim 1, characterized in that, The end of the rotating positioning slot (2) is provided with a slot (21). The length of the slot (21) is less than the length of the rotating positioning slot (2) and greater than the length of the rotating positioning key assembly (4).

4. The metal mold movable block structure according to claim 1, characterized in that, The rotary positioning key assembly (4) includes a positioning key base (41) detachably connected to the mold positioning seat. A positioning platform (42) is provided on the positioning key base (41), and a mating groove (43) and a positioning key (44) are provided on the positioning platform (42).

5. The metal mold movable block structure according to claim 4, characterized in that, The width of the fitting groove (43) is greater than the distance from the inner end face of the rotating positioning slot (2) to the end face of the sand block body (1); the thickness of the positioning key (44) is less than or equal to the width of the rotating positioning slot (2).

6. The metal mold movable block structure according to claim 4, characterized in that, The inner walls of the positioning key base (41) and the positioning platform (42) are both arc-shaped surfaces that fit against the outer wall of the sand block body (1).

7. The metal mold movable block structure according to any one of claims 1-6, characterized in that, The sand block body (1) is a resin sand block body.

8. An auxiliary tooling for assembling the movable block structure of the metal mold as described in claim 1, characterized in that, It includes a tooling body (5) and a tooling handle (6) and a rotating handle (7) connected in sequence to the tooling body (5). The bottom end of the tooling body (5) is detachably connected to the end face of the sand block body (1).

9. The auxiliary tooling for installing the movable block structure of a metal mold according to claim 8, characterized in that, The end face of the sand block body (1) is provided with a number of pin holes, and the end face of the tooling body (5) is provided with a number of pins (3) that correspond to and are connected to the pin holes one by one.

10. A metal mold for casting aluminum alloy, characterized in that, Includes the block structure as described in any one of claims 1-7.

Images