Shell-shaped household appliance stamping die

Abstract

The utility model relates to a kind of shell-like household electrical appliances punch press die, including lower die frame, lower die holder is installed on lower die frame, at least one lower die cavity assembly is installed on lower die holder;Lower die cavity assembly includes lower die cavity plate installed on lower die holder, lower die cavity plate is provided with lower die cavity for product forming processing in middle part, several fixed limiting components and movable limiting components are installed on the lower die cavity plate outside the product flake side of product bottom.The fixed limiting of the utility model is combined with movable limiting, rigid and flexible are combined.The fixed limiting provides main reference, movable limiting provides auxiliary constraint and flexible buffer, can effectively prevent flake displacement in stamping process, ensure the forming precision and consistency of product edge.

Description

Technical Field

[0001] This utility model relates to the technical field of stamping dies for home appliances, and in particular to a stamping die for shell-shaped home appliances. Background Technology

[0002] In stamping processes, especially for shell-shaped home appliances, the material undergoes plastic deformation such as stretching and bending within the mold cavity. A frequently overlooked but crucial issue is that after the forming process is completed, due to stress release, elastic recovery (springback), and slight detachment from the mold cavity wall, the product's boundary (or flange edge) often experiences slight, unpredictable inward shrinkage or movement relative to its original position.

[0003] At this point, traditional rigid positioning blocks or limit blocks, due to their fixed positions, no longer contact the changed boundaries of the product, thus losing their constraint on the product's position within the mold. This can cause the product's horizontal position within the mold to drift, making it highly susceptible to quality defects such as skewed holes and uneven edges during subsequent precision processes like trimming and punching. This severely reduces production accuracy and yield.

[0004] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a stamping die for shell-shaped home appliances, making it more valuable for industrial use. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a stamping die for shell-shaped household appliances.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A stamping die for a shell-shaped household appliance includes a lower die frame, a lower die base mounted on the lower die frame, and at least one lower die cavity assembly mounted on the lower die base. The lower mold cavity assembly includes a lower mold cavity plate mounted on the lower mold base. A lower mold cavity for product molding is provided in the middle of the lower mold cavity plate. Several fixed limiting components and movable limiting components are mounted on the lower mold cavity plate on the outer side of the product sheet at the bottom of the product. The fixed limiting assembly includes a fixed limiting base and a fixed limiting block vertically disposed on the inner side of the top of the fixed limiting base; The movable limiting component includes a movable limiting base, a movable limiting block, and a guide block. The guide block is located in a guide groove inside the movable limiting base. The bottom of the guide block is mounted on the lower mold cavity plate below by a fixing block. The movable limiting block is vertically set on the top inner side of the movable limiting base.

[0007] As a further improvement of this utility model, the bottom of the lower mold frame is installed together with the lower mold base below through several lower mold supports.

[0008] As a further improvement of this utility model, a number of guide columns adapted to the upper mold frame are installed on the lower mold frame.

[0009] As a further improvement of this utility model, a number of mold frame limiting blocks adapted to the upper mold frame are installed on the lower mold frame.

[0010] As a further improvement of this utility model, a sliding groove is provided on the lower model cavity plate below the fixed limiting base, the fixed limiting base is installed on the lower model cavity plate along the direction of the sliding groove, and an oblong hole is provided on the fixed limiting base to match the locking hole on the lower model cavity plate.

[0011] As a further improvement of this utility model, an upper movable locking block is provided on the outer side of the guide block located above the guide groove.

[0012] As a further improvement of this utility model, the outer side of the guide block is connected to the movable guide rod, and the movable guide rod can continue to extend out of the outer side of the guide groove along the direction of the guide groove.

[0013] As a further improvement of this utility model, a spring is installed on the movable guide rod located in the guide groove.

[0014] As a further improvement of this utility model, several lower mold cavity components are arranged side by side on the lower mold base along the left-right direction.

[0015] By means of the above solution, this utility model has at least the following advantages: This invention upgrades traditional static, passive positioning to dynamic, active, following positioning. Through the design of the elastic movable limiting component, the mold can automatically compensate for and adapt to changes in the boundary position of the material during and after molding, fundamentally solving the problem of product displacement within the mold.

[0016] This invention not only significantly improves the dimensional accuracy and consistency of products and reduces the scrap rate, but also provides a reliable in-mold positioning reference for subsequent high-precision secondary processing (such as laser cutting and robotic welding), significantly enhancing the overall performance and process adaptability of the mold.

[0017] This invention combines fixed and movable limiting mechanisms, achieving a balance between rigidity and flexibility. The fixed limiting mechanism provides the primary reference, while the movable limiting mechanism provides auxiliary constraints and flexible buffering, effectively preventing the material from shifting during the stamping process and ensuring the forming accuracy and consistency of the product edges.

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the following are the preferred embodiments of this utility model and are described in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a shell-shaped household appliance stamping die according to the present invention; Figure 2 yes Figure 1 Schematic diagram of the lower and middle model cavity assembly; Figure 3 yes Figure 2 A schematic diagram of the structure of the moving limit component.

[0021] The meanings of the labels in the figures are as follows.

[0022] 1. Lower mold frame; 2. Lower mold support; 3. Lower mold base; 4. Lower mold cavity assembly; 5. Guide post; 6. Mold frame limiting block; 7. Lower mold cavity plate; 8. Product; 9. Product material edge; 10. Fixed limiting assembly; 11. Movable limiting assembly; 12. Slide groove; 13. Waist-shaped hole; 14. Movable limiting base; 15. Movable limiting block; 16. Guide groove; 17. Guide block; 18. Fixed block; 19. Upper movable locking block; 20. Movable guide rod; 21. Spring; 22. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. 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 present 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.

[0025] The first embodiment of this utility model: like Figures 1-3 As shown, a shell-shaped home appliance stamping die of this embodiment includes a lower die frame 1. The bottom of the lower die frame 1 is installed together with the lower die base 3 below it through a plurality of lower die supports 2. A lower die seat 4 is installed on the lower die frame 1, and at least one lower die cavity assembly 5 is installed on the lower die seat 4.

[0026] Specifically, several lower mold cavity assemblies 5 are arranged side by side on the lower mold base 4 in the left-right direction; the lower mold cavity assembly 5 includes a lower mold cavity plate 8 installed on the lower mold base 4, and a lower mold cavity for molding the product 9 is provided in the middle of the lower mold cavity plate 8.

[0027] Surrounding the lower mold cavity, several fixed limiting components 11 and movable limiting components 12 are installed on the lower mold cavity plate 8 on the outer side of the product sheet at the bottom of the product 9.

[0028] The fixed limiting component 11 includes a fixed limiting base and a fixed limiting block vertically disposed on the inner side of the top of the base. A groove 13 is provided on the lower model cavity plate 8 below the fixed limiting base. The fixed limiting base is installed on the lower model cavity plate 8 along the direction of the groove 13. At the same time, an oblong hole 14 is provided on the fixed limiting base. The oblong hole 14 is adapted to the locking hole provided on the lower model cavity plate 8 to realize position adjustment and locking.

[0029] The movable limiting assembly 12 includes a movable limiting base 15 and a movable limiting block 16 vertically disposed on its inner top. The movable limiting base 15 is provided with a guide groove 17, and the guide block 18 is disposed in the guide groove 17. The bottom of the guide block 18 is mounted on the lower model cavity plate 8 below by a fixing block 19.

[0030] An upper movable locking block 20 is provided on the outer side of the guide block 18 above the guide groove 17; the outer side of the guide block 18 is connected to the movable guide rod 21, which extends along the direction of the guide groove 17 and passes through the movable limiting base 15. A spring 22 is fitted on the section of the movable guide rod 21 located in the guide groove 17 to provide a reset elastic force; in addition, several guide pillars 6 and mold frame limiting blocks 7 that are adapted to the upper mold frame are also installed on the lower mold frame 1.

[0031] The movable limiting block 16 in the movable limiting assembly, under the preload of the spring 22, maintains a gentle and constant force on its inner working surface against the edge of the product sheet or the boundary of the initially formed product. When the material boundary begins to move inward due to force during the molding process, the movable limiting block 16 no longer acts as a rigid stop, but instead, under its reaction force, smoothly retracts backward (outward) along the guide groove 17 via the movable limiting base 15. This retraction process is real-time and synchronous. Crucially, the elasticity of the spring 22 ensures that the movable limiting block 16 maintains continuous contact with the product boundary, and this contact force is maintained until the molding action is completely finished and the upper mold is lifted. Therefore, the product will not lose its positioning control at any stage, effectively suppressing uncontrollable displacement caused by material springback or flow.

[0032] The fixed limiting component 11, pre-set with the main positioning reference via the groove 13 and the oblong hole 14, undertakes the main rigid positioning function. The movable limiting component 12, acting as a flexible auxiliary positioning unit, is distributed in boundary areas where material flow or springback is likely, and the two work together. In the initial stage of molding, the fixed and movable limiting blocks jointly and precisely define the material's position. In the later stages of molding, when the fixed limiting block's effect weakens or fails due to changes in boundary shape, the movable limiting component automatically assumes the main positioning maintenance responsibility, ensuring the stability of the final product position.

[0033] The second embodiment of this utility model: This embodiment provides a stamping die for manufacturing household appliances. For example... Figure 1 The mold includes a lower mold frame 1, the bottom of which is fixedly mounted on a lower mold base 3 by four lower mold brackets 2. A rectangular lower mold base 4 is bolted to the lower mold frame 1. Two identical lower mold cavity assemblies 5 are mounted side by side on the lower mold base 4 in the left-right direction for processing two products simultaneously, improving efficiency. Four guide pillars 6 are also installed at the four corners of the lower mold frame 1 for guiding engagement with the upper mold frame (not shown in the figure); two mold frame limiting blocks 7 are installed on each of the front and rear sides to control the mold closing depth.

[0034] like Figure 2Each of the lower mold cavity components 5 includes a lower mold cavity plate 8 fixed to the lower mold base 4 by hexagonal socket screws. A lower mold cavity 10, matching the shape of the door shell product 9, is machined in the center of the lower mold cavity plate 8. Around the lower mold cavity 10, corresponding to the outer side of the bottom sheet edge of the product 9, two sets of fixed limiting components 11 and three sets of movable limiting components 12 are installed on the lower mold cavity plate 8, arranged at intervals.

[0035] Specifically, the fixed limiting assembly 11 includes a fixed limiting base. A groove 13 is machined on the lower mold cavity plate 8 below the base. The bottom of the fixed limiting base matches the groove 13, allowing it to slide along the groove 13. A longitudinal oblong hole 14 is formed on the base. During installation, a bolt is passed through the oblong hole 14 and screwed into the corresponding threaded hole (i.e., locking hole) on the lower mold cavity plate 8. When it is necessary to adjust the position of the fixed limiting block, simply loosen the bolt, push and pull the entire fixed limiting assembly 11 along the groove 13 to the predetermined position, and then tighten the bolt. The fixed limiting block is welded to the inner side of the top of the base, and its inner working surface is a vertical plane, used for rigid positioning of the long or straight edge of the material sheet.

[0036] Specifically, such as Figure 3 As shown, the movable limiting assembly 12 includes a movable limiting base 15, on the inner top of which a movable limiting block 16 is welded to accommodate the curved corners of the product 9. A guide groove 17 extends downward from the bottom of the movable limiting base 15. A rectangular guide block 18 is located within this guide groove 17, and the bottom of the guide block 18 is fastened to the lower mold cavity plate 8 with screws by a square fixing block 19. An upper movable latch 20 extends outward from the top of the guide block 18, which engages with the edge of the top opening of the guide groove 17 to prevent the movable limiting base 15 from dislodging upward. The center of the outer end face of the guide block 18 is threadedly connected to one end of a movable guide rod 21. The movable guide rod 21 passes through a through hole in the outer wall of the movable limiting base 15 and extends outward a certain distance. A spring 22 is fitted onto the section of the movable guide rod 21 located inside the guide groove 17. One end of the spring 22 rests against the guide block 18, and the other end rests against the inner wall of the movable limiting base 15.

[0037] The working process of this embodiment is as follows: Preparation and loading: According to the model of the door shell to be stamped, pre-adjust and lock the positions of each fixed limit component 11 on the slide 13. Place the cut flat sheet on the lower mold cavity plate 8, with the edges of the sheet close to each fixed limit block, and gently held in place by the movable limit block 16 under the preload of the spring 22 to complete the precise positioning.

[0038] Stamping: The upper die holder moves downward under the drive of the press, guided by the guide column 6, and precisely closes with the lower die holder 1. The punch (or forming block) of the upper die cooperates with the lower die cavity 10 to stamp the sheet material. During the forming process, the edge of the product may tend to expand outward due to material flow, which will generate a lateral thrust on the movable limiting block 16. This thrust pushes the movable limiting base 15 to overcome the elastic force of the spring 22 and make a slight yield along the guide groove 17 relative to the fixed guide block 18 to the outside (away from the product direction), thereby buffering the lateral force and avoiding product edge deformation or mold damage that may be caused by hard jamming.

[0039] Mold Opening and Resetting: After stamping, the upper mold frame is lifted to open the mold. The lateral force acting on the movable limit block 16 disappears, the compressed spring 22 releases its elasticity, and pushes the movable limit base 15 to slide inward (towards the product direction) along the guide groove 17 to reset until it returns to its initial position, preparing for the next loading. The formed product 9 can be ejected by the ejection mechanism or removed manually.

[0040] Continuous production: With two parallel lower mold cavity components 5, operators or robots can pick up and put down products at one station while stamping operations are performed at the other station, thus achieving continuous production and significantly improving work efficiency.

[0041] This embodiment effectively solves the problems of inconvenient positioning and adjustment and poor adaptability of traditional molds by using a combination of fixed and movable limiting methods, especially the adjustable fixed limit and the movable limit design with spring reset. It significantly improves the accuracy, stability and efficiency of stamping production of shell-shaped home appliances.

[0042] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0043] 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 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 based on the specific circumstances.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit 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 stamping die for a shell-shaped household appliance, comprising a lower die frame (1), a lower die base (4) mounted on the lower die frame (1), and at least one lower die cavity assembly (5) mounted on the lower die base (4). Its features are: The lower mold cavity assembly (5) includes a lower mold cavity plate (8) mounted on the lower mold base (4). A lower mold cavity for molding the product (9) is provided in the middle of the lower mold cavity plate (8). Several fixed limiting components (11) and movable limiting components (12) are installed on the lower mold cavity plate (8) on the outer side of the product sheet at the bottom of the product (9). The fixed limiting component (11) includes a fixed limiting base and a fixed limiting block vertically disposed on the inner side of the top of the fixed limiting base; The movable limiting component (12) includes a movable limiting base (15), a movable limiting block (16), and a guide block (18). The guide block (18) is located in the guide groove (17) inside the movable limiting base (15). The bottom of the guide block (18) is mounted on the lower model cavity plate (8) below by a fixing block (19). The movable limiting block (16) is vertically arranged on the top inner side of the movable limiting base (15).

2. The stamping die for a shell-shaped household appliance as described in claim 1, characterized in that, The bottom of the lower mold frame (1) is connected to the lower mold base (3) below by several lower mold supports (2).

3. The stamping die for a shell-shaped household appliance as described in claim 1, characterized in that, Several guide columns (6) adapted to the upper mold frame are installed on the lower mold frame (1).

4. The stamping die for a shell-shaped household appliance as described in claim 1, characterized in that, Several mold frame limiting blocks (7) adapted to the upper mold frame are installed on the lower mold frame (1).

5. A stamping die for a shell-shaped household appliance as described in claim 1, characterized in that, A groove (13) is provided on the lower model cavity plate (8) below the fixed limiting base. The fixed limiting base is installed on the lower model cavity plate (8) along the direction of the groove (13). A waist-shaped hole (14) is provided on the fixed limiting base to match the locking hole on the lower model cavity plate (8).

6. The stamping die for a shell-shaped household appliance as described in claim 1, characterized in that, An upper movable locking block (20) is provided on the outer side of the guide block (18) above the guide groove (17).

7. A stamping die for a shell-shaped household appliance as described in claim 1, characterized in that, The outer side of the guide block (18) is connected to the movable guide rod (21), and the movable guide rod (21) can extend out of the outer side of the guide groove (17) along the direction of the guide groove (17).

8. A stamping die for a shell-shaped household appliance as described in claim 7, characterized in that, A spring (22) is installed on the movable guide rod (21) located in the guide groove (17).

9. A stamping die for a shell-shaped household appliance as described in claim 1, characterized in that, Several of the lower mold cavity components (5) are arranged side by side on the lower mold base (4) along the left-right direction.

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