A stretch shell press die facilitating demolding

Abstract

This utility model discloses a stretch shell stamping die for easy demolding, relating to the field of stamping die technology. It includes an upper die and a lower die. A left slider and a right slider are slidably connected to a stripper plate. A first elastic reset member and a second elastic reset member are respectively connected between the left slider and the stripper plate, and between the right slider and the stripper plate. A left piercing blade and a right piercing blade are respectively fixedly connected to the lower ends of the left and right sliders. A vertical through hole is formed between the left and right sliders, and a first limiting shoulder is provided within the vertical through hole. A variable diameter hole is provided above the first limiting shoulder. A middle slider that can move up and down is provided in the vertical through hole. A support head is provided on the middle slider, and a second limiting shoulder matching the first limiting shoulder is formed between the support head and the middle slider. This utility model enables the stretch shell product with completed limiting and locking point structure processing to be smoothly demolded from the die, avoiding the problem of material jamming.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to a stretch shell stamping die that is easy to demold. Background Technology

[0002] A stretched shell is a hollow shell part with a certain shape, size and wall thickness formed by applying tension to a flat blank using a mold, causing it to undergo plastic deformation in the mold cavity.

[0003] Some stretch shells have locking points designed on their side walls due to product assembly requirements, for example... Figure 1 The illustrated Type-C stretchable housing 800 has spring-loaded limiting points 8001 on its two side walls. One end of the limiting point 8001 is connected to the stretchable housing 800, while the other end is suspended and extends into the inner cavity of the stretchable housing 800. During the assembly of the rubber core and the stretchable housing 800, the rubber core is pushed into the stretchable housing 800. The limiting point 8001 deforms upon contact with the rubber core and, after entering the corresponding limiting groove on the rubber core, returns to its original shape and abuts against the rubber core, thus preventing it from slipping out. This limiting point structure is typically manufactured by using a stamping die to partially puncture (cut) the side wall of the stretchable housing while simultaneously pushing it inward. Due to the unique and elastic nature of this limiting point structure, existing stamping dies often result in problems such as difficulty in unloading the stretchable housing product after stamping, or even jamming, thus affecting the mass production of the stretchable housing product. Therefore, there is an urgent need for a stamping die for stretchable housings that facilitates demolding. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a stretch shell stamping die that is easy to demold, so that the stretch shell product with the limit and locking point structure completed can be smoothly demolded from the die, avoiding the problem of jamming.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A stretch shell stamping die that is easy to demold includes an upper die and a lower die. The upper die includes an upper die base, an upper pad, a clamping plate, a back stripper plate and a stripper plate arranged sequentially from top to bottom. The lower die includes a lower die base, a lower pad and a lower template arranged sequentially from bottom to top.

[0007] A horizontally movable left slider and a right slider are slidably connected to the stripper plate. The left slider and the right slider are symmetrically arranged. A first elastic reset member and a second elastic reset member are connected between the left slider and the stripper plate, and between the right slider and the stripper plate, respectively. A left piercing blade and a right piercing blade are fixedly connected to the lower ends of the left slider and the right slider, respectively. A vertical through hole is formed between the left slider and the right slider. A first limiting shoulder is provided in the vertical through hole. A variable diameter hole with an upper diameter smaller than the lower diameter is provided above the first limiting shoulder. A middle slider that can move up and down is provided in the vertical through hole. A support head is provided on the middle slider. A second limiting shoulder that matches the first limiting shoulder is formed between the support head and the middle slider. The lower end of the middle slider can pass through the left piercing blade and the right piercing blade.

[0008] The clamp plate is vertically mounted on both sides of the left and right sliders, with the first upper mold push rod and the second upper mold push rod respectively. The lower ends of the first upper mold push rod and the second upper mold push rod move through the back strip plate and the stripper plate, and the lower ends of the first upper mold push rod and the second upper mold push rod are respectively provided with a first inclined surface and a second inclined surface.

[0009] A lower mold top block is vertically installed on the lower template and aligned with the middle slider. A left slide block and a right slide block that can move horizontally are slidably connected on both sides of the lower mold top block on the lower template. The top of the left slide block and the right slide block are respectively provided with a third slope and a fourth slope parallel to the first slope and the second slope. A left piercing punch and a right piercing punch are horizontally installed on the left slide block and the right piercing punch, respectively, and the left piercing punch and the right piercing punch are matched with the left piercing blade and the right piercing blade, respectively.

[0010] In some embodiments, the variable diameter hole includes a first through hole and a second through hole arranged from top to bottom. The diameter of the second through hole is equal to the outer diameter of the support head, and the diameter of the first through hole is smaller than the outer diameter of the support head. A frustum transition hole is provided between the first through hole and the second through hole.

[0011] Compared with the prior art, this utility model achieves at least the following beneficial effects:

[0012] 1. When the upper and lower molds are closed, the lower mold top block presses against the lower end of the middle slider, causing the middle slider to move upward. The first elastic reset component contracts. When the middle slider moves upward, the support head cooperates with the variable diameter hole to open the left and right sliders, and the left and right piercing blades move in opposite directions. At the same time, the first upper mold push rod and the second upper mold push rod move downward. The first inclined surface of the first upper mold push rod cooperates with the third inclined surface of the left slide block to push the left slide block inward. The second inclined surface of the second upper mold push rod cooperates with the fourth inclined surface of the right slide block to push the right slide block inward. The left and right piercing punches move towards each other. The left piercing punch can cooperate with the left piercing blade to form the left limiting point of the stretched shell product, and the right piercing punch can cooperate with the right piercing blade to form the right limiting point of the stretched shell product.

[0013] 2. When the upper and lower molds open, the upper mold rises, and the left and right slides are reset outwards by the second elastic reset component. The left and right piercing punches are also reset outwards, and the middle slide is reset downwards by the first elastic reset component. The left and right slides drive the left and right piercing blades to close inwards, so that the stretched shell product can be smoothly removed from the mold, avoiding the problem of material jamming and improving the production efficiency of the stretched shell product. Attached Figure Description

[0014] One or more embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:

[0015] Figure 1 This is a schematic diagram of the structure of a Type-C stretchable shell in the prior art;

[0016] Figure 2 This is a schematic diagram of the structure during mold closing in an embodiment of this application;

[0017] Figure 3 This is a schematic diagram of the connection structure of the intermediate slider in an embodiment of this application;

[0018] Figure 4 This is a schematic diagram of the lower template structure according to an embodiment of this application;

[0019] Figure 5 This is a schematic diagram of the structure during mold making in an embodiment of this application.

[0020] The following are the labels in the diagram: 1. Upper mold base; 2. Upper backing plate; 3. Clamping plate; 4. Back stripper plate; 5. Stripper plate; 6. Lower mold base; 7. Lower backing plate; 8. Lower template; 81. Stepped hole; 9. Left slider; 10. Right slider; 20. First elastic reset component; 30. Second elastic reset component; 40. Left piercing blade; 50. Right piercing blade; 60. Vertical through hole; 601. First limiting shoulder; 602. Variable diameter hole; 6021. First through hole; 6022. Second through hole; 6023. Frustum transition hole; 70. Middle slider; 701. Support head; 702. Second limiting shoulder; 80. First upper die push rod; 801. First inclined surface; 90. Second upper die push rod; 901. Second inclined surface; 100. Lower die top block; 1001. Third limiting shoulder; 200. Left slide block; 2001. Third inclined surface; 300. Right slide block; 3001. Fourth inclined surface; 400. Left piercing punch; 500. Right piercing punch; 600. First elastic reset assembly; 6001. Upper die push rod; 6002. Vertical spring; 700. Second elastic reset assembly; 7001. Bolt; 7002. Reset spring; 800. Tension housing; 8001. Limiting point. Detailed Implementation

[0021] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of this application more complete and to fully convey the concept of the present application to those skilled in the art.

[0022] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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 application. 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 one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] like Figures 2-5 As shown in the embodiment of this application, a metal shell stretching mold that facilitates demolding includes an upper mold and a lower mold.

[0024] The upper mold includes, from top to bottom, an upper mold base 1, an upper pad 2, a clamping plate 3, a back ejector plate 4, and an ejector plate 5. A horizontally movable left slider 9 and a right slider 10 are slidably connected to the ejector plate 5. The left slider 9 and right slider 10 are symmetrically arranged, and a first elastic reset member 20 and a second elastic reset member 30 are respectively connected between the left slider 9 and the ejector plate 5, and between the right slider 10 and the ejector plate 5. A left piercing blade 40 and a right piercing blade 50 are respectively fixedly connected to the lower ends of the left slider 9 and the right slider 10. A vertical through hole 60 is formed between the left slider 9 and the right slider 10, and a first limiting shoulder 601 is provided within the vertical through hole 60. A variable diameter hole 602 with an upper diameter smaller than the lower diameter is provided above the first limiting shoulder 601. A middle slider that can move up and down is provided in the vertical through hole 60. 70. The intermediate slider 70 is provided with a support head 701. The support head 701 is located inside the variable diameter hole 602 and its lower end can press on the first limiting shoulder 601. The support head 701 and the first limiting shoulder 601 cooperate to limit the intermediate slider 70 to a lower position. The upper end of the intermediate slider 70 is connected to a first elastic reset component 600. The lower end of the intermediate slider 70 can pass through the left piercing knife 40 and the right piercing knife 50. The clamping plate 3 is vertically installed on both sides of the left slider 9 and the right slider 10, respectively, with a first upper mold push rod 80 and a second upper mold push rod 90. The lower ends of the first upper mold push rod 80 and the second upper mold push rod 90 move through the back stripping plate 4 and the stripping plate 5. The lower ends of the first upper mold push rod 80 and the second upper mold push rod 90 are respectively provided with a first inclined surface 801 and a second inclined surface 901.

[0025] It should be noted that, in the non-working state, the first elastic reset member 20 and the second elastic reset member 30 can push the left slider 9 and the right slider 10 against the middle slider 70 respectively due to the elastic force, thereby closing the left slider 9 and the right slider 10 with the middle slider 70, and the left piercing blade 40 and the right piercing blade 50 also close with the middle slider 70; the first elastic reset component 600 can press down the upper end of the middle slider 70 due to the elastic force, while the lower end of the middle slider 70 passes through the left piercing blade 40 and the right piercing blade 50, and the first limiting shoulder 601 limits the middle slider 70 to a lower position.

[0026] The lower mold includes a lower mold base 6, a lower pad 7, and a lower template 8 arranged sequentially from bottom to top. A lower mold top block 100, aligned with the intermediate slider 70, is vertically mounted on the lower template 8. The stretched outer shell product is positioned on the upper part of the lower mold top block 100. A horizontally movable left slide block 200 and a right slide block 300 are slidably connected to both sides of the lower mold top block 100 on the lower template 8. The tops of the left slide block 200 and the right slide block 300 are respectively provided with... The first inclined surface 801 and the second inclined surface 901 are parallel to the third inclined surface 2001 and the fourth inclined surface 3001. The left slide 200 and the right slide 300 are respectively horizontally mounted with a left piercing punch 400 and a right piercing punch 500. The left piercing punch 400 and the right piercing punch 500 are respectively matched with the left piercing blade 40 and the right piercing blade 50. The left slide 200 and the right slide 300 are also connected with a second elastic reset assembly 700.

[0027] It should be noted that when the upper and lower molds are closed, the lower mold ejector block 100 presses against the lower end of the intermediate slider 70, causing the intermediate slider 70 to move upward. The first elastic reset component 600 retracts. When the intermediate slider 70 moves upward, the support head 701 cooperates with the variable diameter hole 602 to open the left slider 9 and the right slider 10. The left slider 9 and the right slider 10 move in opposite directions, thereby driving the left piercing blade 40 and the right piercing blade 50 to move in opposite directions. At the same time, the first upper mold push rod 80 and the second upper mold push rod 90 move downward. The first inclined surface 801 of the first upper mold push rod 80 cooperates with the third inclined surface 2001 of the left slide block 200, pushing the left slide block 200 inward. The second inclined surface 901 of the second upper mold push rod 90 cooperates with the fourth inclined surface 3001 of the right slide block 300. In coordination, the right slide 300 is pushed inward, and the left slide 200 moves in the opposite direction to the right slide 300, thereby causing the left piercing punch 400 and the right piercing punch 500 to move in the opposite direction. Since the left piercing blade 40, the right piercing blade 50 and the lower end of the middle slider 70 enter the inner cavity of the stretch shell product in a closed state, and the left piercing punch 400 and the right piercing punch 500 are located on the outer sides of the stretch shell product respectively, the left piercing punch 400 can cooperate with the left piercing blade 40 to produce a partial cut and push inward at the same time, thereby forming the left limiting point 8001 of the stretch shell product. The right piercing punch 500 can cooperate with the right piercing blade 50 to produce a partial cut and push inward at the same time, thereby forming the right limiting point 8001 of the stretch shell product.

[0028] Specifically, the variable diameter hole 602 includes a first through hole 6021 and a second through hole 6022 arranged from top to bottom. The diameter of the second through hole 6022 is equal to the outer diameter of the support head 701, and the diameter of the first through hole 6021 is smaller than the outer diameter of the support head 701. A frustum transition hole 6023 is provided between the first through hole 6021 and the second through hole 6022. The upper end of the support head 701 is provided with a chamfer that matches the frustum transition hole 6023, so that when the support head 701 moves upward, it can better cooperate with the variable diameter hole 602 to open the left slider 9 and the right slider 10.

[0029] Furthermore, a second limiting shoulder 702 is formed between the lower end of the support head 701 and the intermediate slider 70, and the second limiting shoulder 702 matches the first limiting shoulder 601. The support head 701, through the cooperation of the two limiting shoulders and the first limiting shoulder 601, can restrict the intermediate slider 70 from moving further downward.

[0030] In addition, the stripping plate 5 is provided with mounting holes to accommodate the left slider 9 and the right slider 10; the first elastic reset member 20 and the second elastic reset member 30 are springs, with the two ends of the first elastic reset member 20 abutting against the left slider 9 and the side wall of the mounting hole respectively, and the two ends of the second elastic reset member 30 abutting against the right slider 10 and the side wall of the mounting hole respectively.

[0031] The first elastic reset assembly 600 includes an upper mold ejector rod 6001 and a vertical spring 6002. The lower end of the upper mold ejector rod 6001 sequentially passes through the upper pad 2, the clamping plate 3, and the back release plate 4, and contacts the upper end of the intermediate slider 70. The vertical spring 6002 is vertically mounted on the upper mold base 1, with its upper end abutting against the upper mold base 1 and its lower end abutting against the upper end of the upper mold ejector rod 6001. It should be noted that when the upper mold and lower mold open, the vertical spring 6002 returns to its original length due to the elastic force, thereby resetting by pushing the upper mold ejector rod 6001 and the intermediate slider 70.

[0032] The lower template 8 is provided with a stepped hole 81 horizontally outside the left slide 200 and the right slide 300; a second elastic reset assembly 700 is connected to the left slide 200 and the right slide 300. The second elastic reset assembly 700 includes a bolt 7001 and a reset spring 7002. The head of the bolt 7001 is located outside the stepped hole 81, and the screw end of the bolt 7001 passes through the stepped hole 81 and is threadedly connected to the left slide 200 or the right slide 300. The reset spring 7002 is sleeved on the screw of the bolt 7001, with one end abutting against the stepped end face of the stepped hole 81 and the other end abutting against the head of the bolt 7001. It should be noted that when the upper and lower molds open, the upper mold drives the first upper mold push rod 80 and the second upper mold push rod 90 to rise. The first upper mold push rod 80 and the second upper mold push rod 90 separate from the left slide 200 and the right slide 300 respectively. The return spring 7002 returns to its original length due to the elastic force, thereby pushing the head of the bolt 7001 to move the bolt 7001 outward. The bolt 7001 drives the left slide 200 or the right slide 300 to move outward and reset, so that the left piercing punch 400 and the right piercing punch 500 move away from the stretching shell 800, so as to facilitate the demolding of the stretching shell 800.

[0033] The lower die top block 100 is provided with a third limiting shoulder 1001 on its upper part. The stretch shell product is sleeved on the lower die top block 100, and the third limiting shoulder 1001 is used to support the stretch shell product below.

[0034] The working principle of this utility model is as follows:

[0035] Under the operation of the punch press, the stripper plate 5 and the lower die plate 8 first contact and close to press down on the stretched shell product. When the back stripper plate 4 and the clamping plate 3 close, the first upper die push rod 80 and the second upper die push rod 90 respectively push the left slide block 200 and the right slide block 300 to slide inward, and the left piercing punch 400 and the right piercing punch 500 move inward. The lower ends of the left piercing blade 40, the right piercing blade 50 and the middle slider 70 enter the inner cavity of the stretched shell product in a closed state. When the middle slider 70 contacts the lower die top block 100, it will move upward, and the support head 701 will open the left slider 9 and the right slider 10. At this time, the left piercing blade 40 and the right piercing blade 50 move outward. The left piercing punch The left piercing punch 400 and the right piercing punch 500 cooperate with the left piercing blade 40 and the right piercing blade respectively to complete the processing of the two-sided limiting and locking points 8001 structure; after completing one stroke, the upper mold rises, the left slide block 200 and the right slide block 300 are reset outward under the action of the second elastic reset component 700, the left piercing punch 400 and the right piercing punch 500 are reset outward, the middle slide block 70 is reset downward under the action of the first elastic reset component 600, the left slide block 9 and the right slide block 10 drive the left piercing blade 40 and the right piercing blade to close in the middle, so that the stretch shell 800 product can be smoothly removed from the mold, avoiding the problem of jamming, and improving the production efficiency of the stretch shell 800 product.

[0036] It should be understood that all the above embodiments are exemplary and not restrictive. Any modifications, equivalent changes and alterations made by those skilled in the art to the specific embodiments described above under the concept of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A stretchable shell stamping die for easy demolding, comprising an upper die and a lower die, wherein the upper die comprises, from top to bottom, an upper die base, an upper pad, a clamping plate, a back stripper plate, and a stripper plate, and the lower die comprises, from bottom to top, a lower die base, a lower pad, and a lower template plate, characterized in that: The stripping plate is slidably connected to a horizontally movable left slider and a right slider symmetrically arranged. A first elastic reset component and a second elastic reset component are respectively connected between the left slider and the stripping plate, and between the right slider and the stripping plate. A left piercing blade and a right piercing blade are respectively fixedly connected to the lower ends of the left slider and the right slider. A vertical through hole is formed between the left slider and the right slider. The vertical through hole is provided with a first limiting shoulder and a middle slider that can move up and down. A variable diameter hole with an upper diameter smaller than the lower diameter is provided above the first limiting shoulder. A support head is provided on the middle slider. The support head is located in the variable diameter hole and its lower end can press on the first limiting shoulder. A first elastic reset component is connected to the upper end of the middle slider, and its lower end can pass through the left piercing blade and the right piercing blade. The clamp plate is vertically mounted on both sides of the left and right sliders, with a first upper mold push rod and a second upper mold push rod respectively. The lower ends of the first upper mold push rod and the second upper mold push rod movably pass through the back strip plate and the stripper plate, and the lower ends of the first upper mold push rod and the second upper mold push rod are respectively provided with a first inclined surface and a second inclined surface. A lower mold top block aligned with the middle slider is vertically mounted on the lower template. A horizontally movable left slide block and a right slide block are slidably connected to both sides of the lower mold top block on the lower template. The top of the left slide block and the right slide block are respectively provided with a third inclined surface and a fourth inclined surface parallel to the first inclined surface and the second inclined surface. A left piercing punch and a right piercing punch are horizontally mounted on the left slide block and the right piercing punch are respectively matched with the left piercing blade and the right piercing blade. A second elastic reset component is also connected to the left slide block and the right slide block.

2. The easy-to-demold stretch shell stamping die according to claim 1, characterized in that: The variable diameter hole includes a first through hole and a second through hole arranged sequentially from top to bottom. The diameter of the second through hole is equal to the outer diameter of the support head, and the diameter of the first through hole is smaller than the outer diameter of the support head. A frustum transition hole is provided between the first through hole and the second through hole, and a chamfer is provided at the upper end of the support head to match the frustum transition hole.

3. The easy-to-demold stretch shell stamping die according to claim 2, characterized in that: A second limiting shoulder is formed between the lower end of the support head and the intermediate slider, and the second limiting shoulder matches the first limiting shoulder.

4. The easy-to-demold stretch shell stamping die according to claim 1, characterized in that: The stripper plate is provided with mounting holes for accommodating the left and right sliders; the first elastic reset member and the second elastic reset member are springs, with the two ends of the first elastic reset member abutting against the left slider and the side wall of the mounting hole respectively, and the two ends of the second elastic reset member abutting against the right slider and the side wall of the mounting hole respectively.

5. The easy-to-demold stretch shell stamping die according to claim 1, characterized in that: The first elastic reset assembly includes an upper mold ejector rod and a vertical spring. The lower end of the upper mold ejector rod moves sequentially through the upper pad, the clamping plate and the back release plate and contacts the upper end of the intermediate slider. The vertical spring is vertically mounted on the upper mold base, with its upper end abutting against the upper mold base and its lower end abutting against the upper end of the upper mold ejector rod.

6. The easy-to-demold stretch shell stamping die according to claim 1, characterized in that: The lower template has a stepped hole horizontally located outside the left and right slide blocks; the second elastic reset assembly includes a bolt and a reset spring. The head of the bolt is located outside the stepped hole, and the end of the bolt thread passes through the stepped hole and is threadedly connected to the left or right slide block. The reset spring is sleeved on the bolt thread, with one end abutting the stepped end face of the stepped hole and the other end abutting the bolt head.

7. The easy-to-demold stretch shell stamping die according to claim 1, characterized in that: The upper part of the lower mold top block is provided with a third limiting shoulder, and the stretched shell product is sleeved on the lower mold top block. The third limiting shoulder is used to support the stretched shell product from below.

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