A mold for solving cantilever sway

Abstract

This utility model discloses a mold for solving cantilever sway, including a flow guide mold and a surface mold. The flow guide mold and the surface mold are joined together to form an extrusion mold. The mating surfaces of the flow guide mold and the surface mold that are close to each other form a first mold closing surface and a second mold closing surface, respectively. The side of the flow guide mold away from the first mold closing surface is the feeding surface, and the side of the surface mold away from the second mold closing surface is the discharge surface. A flow guide pit is provided through the flow guide mold, and the sidewall of the flow guide pit is designed to vertically penetrate the feeding surface and the first mold closing surface. The surface mold has a shallow sink groove on the second mold closing surface. The shallow sink groove is positioned and matched with the flow guide pit. A working strip is provided on the inner bottom surface of the shallow sink groove, and the working strip is set through the surface mold. The split structure allows the flow guide mold and the surface mold to be disassembled separately. The shallow sink groove of the surface mold directly exposes the working strip, which is convenient for polishing and cleaning operations. The vertical flow guide pit of the flow guide mold has no complicated corners, and aluminum slag residue is easy to remove.

Description

Technical Field

[0001] This utility model relates to the field of extrusion die technology, specifically to a die for solving cantilever sway. Background Technology

[0002] Aluminum profile extrusion dies are the core process equipment in aluminum profile production, and their technical level directly determines the forming quality, production efficiency, and application range of aluminum profiles. The principle of aluminum profile extrusion is as follows: heated aluminum alloy round ingots ("aluminum bars") are subjected to high pressure through an extruder, forcing the aluminum material through the "cavity" of the die (a channel with the same cross-section as the target aluminum profile), and finally extruding a profile with the same shape as the cavity.

[0003] Currently facing production challenges such as Figure 5 The aluminum profile shown has a deep U-shaped cross-section. While the profile structure is simple, the inner side of the deep U-shaped opening requires a cantilevered extension structure in the extrusion die design. Due to the simple profile structure, ordinary extrusion dies are typically designed as a single piece with shallow guide channels (the purpose of shallow guide channels is to facilitate cleaning of the internal working zone; the die needs to be polished before each use to ensure the working zone is flat). However, in actual production, aluminum cutting is performed. Aluminum cutting refers to the process where, after an aluminum rod is extruded, due to the gap between the rod and the die's feed surface, and the stickiness of aluminum under high temperature and pressure, some aluminum residue remains on the die's feed surface. If this residual aluminum waste is not removed promptly, it will affect the quality of the next aluminum rod extrusion, potentially causing surface defects, dimensional inaccuracies, and even damaging the die, reducing its lifespan. However, in actual production, it was found that during the aluminum cutting process of extrusion molding, shallow guide grooves would cause all the aluminum to be carried away each time it was cut, which would seriously affect production efficiency.

[0004] For the reasons mentioned above, it is necessary to propose a mold to solve the cantilever sway problem. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a mold for solving the problem of cantilever sway.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A mold for solving cantilever sway includes a flow guide mold and a surface mold, wherein the flow guide mold and the surface mold are joined to form an extrusion mold; both the flow guide mold and the surface mold are flat cylindrical structures, and the mating surfaces of the flow guide mold and the surface mold that are close to each other form a first mold closing surface and a second mold closing surface, respectively. The side of the flow guide mold away from the first mold closing surface is the feeding surface, and the side of the surface mold away from the second mold closing surface is the discharging surface. The guide mold is provided with a guide pit, and the sidewall of the guide pit is designed to vertically connect the feeding surface and the first mold closing surface. The surface mold has a shallow sink groove on the second mold closing surface. The shallow sink groove is positioned corresponding to the guide pit and its outline shape matches. A working strip is provided on the inner bottom surface of the shallow sink groove, and the working strip penetrates the surface mold.

[0007] Furthermore, the guide pit is a U-shaped through hole, forming a first cantilever on the guide mold; the working belt is a U-shaped working belt with the same cross-section as the aluminum profile, forming a second cantilever on the face mold, and the first cantilever and the second cantilever are tightly fitted at the joint surface.

[0008] Furthermore, the first cantilever forms a protruding pin block on the first mold closing surface, and the second cantilever forms an inwardly recessed pin groove on the second mold closing surface. When the flow guide mold and the surface mold are closed, the protruding pin block and the pin groove form a pin engagement.

[0009] Furthermore, the convex pin block and the concave pin groove are in clearance fit and form a misalignment constraint. The clearance range between the convex pin block and the concave pin groove is 0.005-0.03mm at room temperature. (1. Minimum gap ≥ 0.005mm: Reserve space for thermal expansion to avoid thermal jamming; 2. Maximum gap ≤ 0.03mm: Limit the lateral offset of the upper and lower molds (to ensure cavity alignment and avoid uneven profile wall thickness).

[0010] Furthermore, the die has multiple levels of air cutters on one side of the discharge surface, and from the working surface to the discharge surface, they are sequentially a first-level air cutter, a second-level air cutter, and a third-level air cutter.

[0011] Furthermore, the flow guiding mold and the surface mold are provided with multiple mold closing guide structures and bolt locking structures; The mold closing guide structure includes a guide rod and a guide hole. The guide rod is vertically disposed on the first mold closing surface, and the guide hole is disposed through the mold face corresponding to the position of the guide rod. The bolt locking structure includes bolt holes and screw holes. The screw holes are located on the first mold mating surface, and the bolt holes are located through the mold surface and correspond to the position of the bolt holes.

[0012] Furthermore, a positioning rod is provided on the circumferential side of the mold, and the positioning rod is arranged to protrude radially.

[0013] The advantages and beneficial effects of this utility model are as follows: the gap constraint between the protruding pin and the concave pin groove, and the precise positioning of the mold closing guide structure, provide double protection for the alignment of the guide pit and the working zone cavity, avoiding problems such as uneven profile wall thickness and cross-sectional deformation caused by mold offset; at the same time, the vertically penetrating guide pit can make the aluminum liquid flow evenly to the working zone, reducing surface defects (such as bubbles and scratches) caused by uneven aluminum liquid flow, and improving the surface quality and dimensional consistency of the profile.

[0014] The split structure allows the flow guide mold and the surface mold to be disassembled separately. The shallow sink groove of the surface mold directly exposes the working zone, making it easy to complete polishing and cleaning operations. The vertical flow guide pit of the flow guide mold has no complicated corners, making it easy to remove aluminum slag residue, reducing the mold maintenance time before each machine run and improving equipment utilization. Attached Figure Description

[0015] Figure 1 This is one of the schematic diagrams of the mold closing process for solving the problem of cantilever sway in this utility model; Figure 2 This is the second schematic diagram of the mold closing process for solving the problem of cantilever sway in this utility model; Figure 3 This is a front view of the flow guide mold and the surface mold when they are separated in this utility model; Figure 4 This is a schematic diagram of the back of the flow guide mold and the surface mold when they are separated in this utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of an aluminum profile product with a deep U-shaped cross-section; In the diagram: 1. Flow guide mold; 2. Surface mold; 3. First mold closing surface; 4. Second mold closing surface; 5. Feed surface; 6. Discharge surface; 7. Flow guide pit; 8. Shallow sinker; 9. Working zone; 10. First cantilever; 11. Second cantilever; 12. Protruding pin block; 13. Concave pin groove; 14. First-stage air cutter; 15. Second-stage air cutter; 16. Third-stage air cutter; 17. Mold closing guide structure; 18. Guide rod; 19. Guide hole; 20. Bolt locking structure; 21. Bolt hole; 22. Screw hole; 23. Positioning rod. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to examples. These examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0017] A mold for solving cantilever sway, such as Figure 1-4As shown, it includes a flow guide mold 1 and a surface mold 2. The flow guide mold 1 and the surface mold 2 are joined together to form an extrusion mold. Both the flow guide mold 1 and the surface mold 2 are flat cylindrical structures. The mating surfaces of the flow guide mold 1 and the surface mold 2 that are close to each other form a first mold closing surface 3 and a second mold closing surface 4, respectively. The side of the flow guide mold 1 away from the first mold closing surface 3 is the feeding surface 5, and the side of the surface mold 2 away from the second mold closing surface 4 is the discharging surface 6. The guide mold 1 is provided with a guide pit 7, and the side wall of the guide pit 7 is designed to vertically connect the feed surface 5 and the first mold closing surface 3. The guide pit 7 is designed to be continuous, so that there are no steps inside and the inner wall is flat, which makes it easy to clean the inside of the deepened guide pit 7.

[0018] The face mold 2 has a shallow recessed groove 8 on the second mold closing surface 4. The shallow recessed groove 8 corresponds to the flow guide pit 7 in position and its outline is matched. A working strip 9 is provided on the inner bottom surface of the shallow recessed groove 8, and the working strip 9 penetrates the face mold 2. The shallow recessed groove 8 can be precisely aligned with the flow guide pit 7, which facilitates the flow of aluminum. Furthermore, the design of the shallow recessed groove 8 makes it easier to approach the working strip 9 and grind and clean its interior.

[0019] The separate design of the flow guide mold 1 and the surface mold 2 facilitates the cleaning of the working zone 9 inside the mold, while avoiding the problem of all aluminum being carried away during aluminum cutting caused by the shallow flow guide groove in an integrated mold, thus improving production efficiency. In actual use, the flow guide mold 1 is thickened, so the flow guide pit 7 is correspondingly thickened to prevent aluminum from being carried away during aluminum cutting. The mold is divided into a flow guide mold 1 and a surface mold 2. The flow guide mold 1 is responsible for guiding the aluminum flow, while the surface mold 2 is responsible for forming. This design allows for more flexible design of the flow guide groove, no longer limited to the shallow flow guide groove designed for cleaning the working zone 9 in an integrated mold.

[0020] Furthermore, the flow guide pit 7 is a U-shaped through hole, forming a first cantilever 10 on the flow guide mold 1; the working belt 9 is a U-shaped working belt 9 with the same cross-section as the aluminum profile, forming a second cantilever 11 on the face mold 2, and the first cantilever 10 and the second cantilever 11 are tightly fitted at the joint surface.

[0021] The design of the guide pit 7 and the shallow sinking trough 8 ensures that the molten aluminum can flow smoothly into the working zone 9, while guaranteeing the strength and stability of the mold. The guide pit 7 on the guide mold 1 is a U-shaped through hole, forming the first cantilever 10 on the guide mold 1. The working zone 9 on the face mold 2 is U-shaped with the same cross-section as the aluminum profile, forming the second cantilever 11 on the face mold 2. The sidewall of the guide pit 7 vertically penetrates the feed surface 5 and the first mold closing surface 3. The molten aluminum enters the guide pit 7 from the feed surface 5, then flows through the guide pit 7 into the shallow sinking trough 8 of the face mold 2, and finally enters the working zone 9. The shallow sinking trough 8 corresponds to the position of the guide pit 7 and its contour shape matches, which can accurately guide the molten aluminum to flow to the working zone 9. At the same time, the first cantilever 10 and the second cantilever 11 fit tightly at the joint surface, enhancing the overall strength of the mold.

[0022] Furthermore, the cooperation between the protruding pin 12 and the concave pin groove 13 can effectively prevent the cantilever from swaying during the extrusion process, thus ensuring the forming quality of the aluminum profile.

[0023] The first cantilever 10 forms a protruding pin block 12 on the first mold closing surface 3, and the second cantilever 11 forms an inwardly recessed pin groove 13 on the second mold closing surface 4. During mold closing, the pin block 12 and the pin groove 13 form a pin-fit. This fit effectively restricts the lateral movement of the cantilever, thus preventing cantilever sway. The pin block 12 and the pin groove 13 are in a clearance fit, with a clearance range of 0.005-0.03 mm at room temperature, creating a misalignment constraint between them. The minimum clearance ≥ 0.005 mm allows for thermal expansion space, preventing thermal jamming; the maximum clearance ≤ 0.03 mm restricts lateral displacement of the upper and lower molds, ensuring cavity alignment and preventing uneven profile wall thickness.

[0024] Furthermore, the die 2 has multi-stage air cutters on one side of the discharge surface 6, with the air cutters arranged sequentially from the working surface to the discharge surface 6: a first-stage air cutter 14, a second-stage air cutter 15, and a third-stage air cutter 16. This multi-stage air cutter design gradually reduces the contact area between the aluminum profile and the die, lowering frictional resistance and allowing the aluminum profile to discharge more smoothly. This reduces surface scratches and other defects, improves surface quality, and also reduces die wear, extending die life. It reduces friction between the aluminum profile and the die during discharge, improving the surface quality of the aluminum profile and the lifespan of the die.

[0025] Furthermore, the flow guide mold 1 and the surface mold 2 are provided with multiple mold closing guide structures 17 and bolt locking structures 20; the mold closing guide structure 17 includes a guide rod 18 and a guide hole 19, the guide rod 18 is vertically arranged on the first mold closing surface 3, and the guide hole 19 is correspondingly arranged through the surface mold 2; the bolt locking structure 20 includes a bolt hole 21 and a screw hole 22, the screw hole 22 is arranged on the first mold closing surface 3, and the bolt hole 21 is arranged through the surface mold 2 and corresponds to the bolt hole 21.

[0026] Specifically, such as Figure 3 , 4 As shown, a mold closing guide structure 17 and a bolt locking structure 20 are set at the four corners of the extrusion mold, and are arranged diagonally, specifically two sets of mold closing guide structures 17 and two sets of bolt locking structures 20; when the mold is closed, the guide rod 18 and the guide hole 19 make the flow guide mold 1 and the surface mold 2 precisely aligned, and then the bolts are screwed into the two bolt locking structures 20 to fix the extrusion mold into a whole. The mold closing guide structure 17 includes a guide rod 18 and a guide hole 19. The guide rod 18 is vertically disposed on the first mold closing surface 3, and the guide hole 19 is disposed through the surface mold 2, corresponding to the position of the guide rod 18. During mold closing, the guide rod 18 is inserted into the guide hole 19 to guide the mold and ensure accurate mold closing between the flow guiding mold 1 and the surface mold 2. The bolt locking structure 20 includes a bolt hole 21 and a screw hole 22. The screw hole 22 is disposed on the first mold closing surface 3, and the bolt hole 21 is disposed through the surface mold 2 and corresponds to the position of the screw hole 22. The flow guiding mold 1 and the surface mold 2 are fixed together by bolts, which enhances the overall stability of the mold and prevents the mold from shifting during the extrusion process.

[0027] The die 2 has a positioning rod 23 on its circumferential side, which protrudes radially. When installing the die, the positioning rod 23 can cooperate with the positioning device on the extruder to accurately determine the position of the die, improve the installation accuracy, and ensure that the die can work stably during the extrusion process.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A mold for solving cantilever sway, characterized in that, It includes a flow guide mold and a surface mold, which are joined together to form an extrusion mold; both the flow guide mold and the surface mold are flat cylindrical structures, and the mating surfaces of the flow guide mold and the surface mold that are close to each other form a first mold closing surface and a second mold closing surface, respectively. The side of the flow guide mold away from the first mold closing surface is the feeding surface, and the side of the surface mold away from the second mold closing surface is the discharging surface. The guide mold is provided with a guide pit, and the sidewall of the guide pit is designed to vertically connect the feeding surface and the first mold closing surface. The surface mold has a shallow sink groove on the second mold closing surface. The shallow sink groove is positioned corresponding to the guide pit and its outline shape matches. A working strip is provided on the inner bottom surface of the shallow sink groove, and the working strip penetrates the surface mold.

2. The mold for solving cantilever sway according to claim 1, characterized in that, The flow guide pit is a U-shaped through hole, forming a first cantilever on the flow guide mold; the working belt is a U-shaped working belt with the same cross-section as the aluminum profile, forming a second cantilever on the surface mold, and the first cantilever and the second cantilever are tightly fitted at the joint surface.

3. The mold for solving cantilever sway according to claim 2, characterized in that, The first cantilever forms a protruding pin block on the first mold closing surface, and the second cantilever forms an inwardly recessed pin groove on the second mold closing surface. When the flow guide mold and the surface mold are closed, the protruding pin block and the pin groove form a pin engagement.

4. The mold for solving cantilever sway according to claim 3, characterized in that, The convex pin and the concave pin groove are in clearance fit and form a misalignment constraint. The clearance range between the convex pin and the concave pin groove is 0.005-0.03 mm at room temperature.

5. A mold for solving cantilever sway according to claim 1, characterized in that, The die has multiple levels of air cutters on one side of the discharge surface, and from the working surface to the discharge surface, they are sequentially a first-level air cutter, a second-level air cutter, and a third-level air cutter.

6. A mold for solving cantilever sway according to claim 1, characterized in that, The flow guide mold and the surface mold are provided with multiple mold closing guide structures and bolt locking structures; The mold closing guide structure includes a guide rod and a guide hole. The guide rod is vertically disposed on the first mold closing surface, and the guide hole is disposed through the mold face corresponding to the position of the guide rod. The bolt locking structure includes bolt holes and screw holes. The screw holes are located on the first mold mating surface, and the bolt holes are located through the mold surface and correspond to the position of the bolt holes.

7. A mold for solving cantilever sway according to claim 1, characterized in that, The surface of the mold is provided with a positioning rod, which is arranged to protrude radially.

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