Magnetic thermal bulging die

Abstract

The utility model discloses a magnetic thermal bulging die, which relates to the technical field of aluminum cup manufacturing, aims to solve the technical problem that the existing stamping die cannot perform slope processing on the side wall of an ultrathin aluminum cup, and comprises a support bottom plate, a die body, a straight wall blank, a cup opening sealing component and a heating core, the mold body is provided with a containing cavity with openings in the top and the bottom, and the containing cavity is of a circular truncated cone cavity structure with the cavity diameter gradually reduced from top to bottom. Through the arrangement of the mold body, the cup opening sealing assembly and the heating core, when the mold is used, the cup opening sealing assembly is driven to linearly move in the longitudinal direction until the cup opening sealing assembly blocks and seals a top opening of a straight-wall blank, meanwhile, the heating core is completely inserted into an inner cavity of the straight-wall blank, and then the heating core is heated; the straight-wall blank is bulged, attached to the containing cavity of the die body and deformed into the needed finished product shape, the die is simple, easy to machine and low in cost, and the technical problem that an existing stamping die cannot conduct slope machining on the side wall of the ultrathin aluminum cup is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum cup manufacturing, and more specifically to a magnetic thermal expansion die. Background Art

[0002] For good stacking performance, the wall of the aluminum cup has the same slope as that of plastic cups and paper cups. The existing high-precision stamping die can easily punch out aluminum cups with a wall thickness of about 0.1-0.5mm, but the existing stamping die cannot process the slope of the side wall of the ultra-thin aluminum cup. In view of this, we propose a magnetic thermal expansion die. Utility Model Content

[0003] The utility model aims to provide a magnetic thermal expansion die to solve the technical problem that the existing stamping die cannot perform slope processing on the side wall of an ultra-thin aluminum cup.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a magnetic thermal expansion die, comprising a supporting bottom plate, a die body, a straight wall blank, a cup mouth sealing assembly and a heating core;

[0005] The mold body is arranged on the supporting bottom plate, and the mold body has a cavity with top and bottom openings, and the cavity is a truncated cone cavity structure with a cavity diameter gradually decreasing from top to bottom; wherein the material of the mold body is a non-magnetic material such as aluminum alloy or ceramic, and will not produce a magnetocaloric effect on the induction coil;

[0006] The straight-wall blank is arranged in the cavity, and the top of the straight-wall blank has an opening;

[0007] The cup mouth sealing assembly support is arranged above the mold body;

[0008] The heating core is vertically mounted at the bottom of the cup mouth sealing assembly;

[0009] The cup mouth sealing assembly moves linearly in the longitudinal direction until it blocks and seals the top opening of the straight-wall blank, and at the same time causes the heating core to be fully inserted into the inner cavity of the straight-wall blank.

[0010] The utility model is provided with a mold body, a cup mouth sealing component and a heating core, and the cavity of the mold body is a truncated cone cavity structure with a cavity diameter gradually decreasing from top to bottom. When in use, the cup mouth sealing component is driven to move linearly along the longitudinal direction until it blocks and seals the top opening of the straight-walled blank, and at the same time the heating core is completely inserted into the inner cavity of the straight-walled blank, and then the heating core is heated to make the straight-walled blank complete the expansion, fit the cavity of the mold body, and deform into the required finished product shape. The mold is simple, easy to process and low in cost, and solves the technical problem that the existing stamping mold cannot perform slope processing on the side wall of the ultra-thin aluminum cup.

[0011] Preferably, the cup mouth sealing assembly comprises an external power group, a sealing base, a sealing ring and a push plate;

[0012] Wherein, the external power group includes a lifting frame and a cylinder mounted on the output end of the lifting frame;

[0013] The sealing base includes a base plate and a plug; the end of the base plate is connected to the output end of the lifting frame through a connecting rod, and a plurality of through grooves are provided on the base plate near its edge; the plug is integrally connected to the middle of the bottom surface of the base plate, the bottom of the plug has an opening, and the plug is a truncated cone structure with an outer diameter gradually decreasing from its top end to the open end; the outer diameter of the upper end of the plug is larger than the inner diameter of the cup mouth of the straight-walled blank, and the outer diameter of the lower end of the plug is smaller than the inner diameter of the cup mouth of the straight-walled blank;

[0014] The sealing ring is sleeved on the outside of the plug, and the inner ring diameter of the sealing ring is smaller than the outer diameter of the upper end of the plug and larger than the outer diameter of the lower end of the plug;

[0015] The push plate includes a connecting plate and a plurality of sliding connecting rods evenly spaced and connected to the bottom of the connecting plate; the top end of the connecting plate is detachably connected to the piston end of the cylinder, and the sliding connecting rod passes through the through groove and is fixedly connected to the top of the sealing ring.

[0016] Preferably, it further comprises an electromagnetic coil, which is wound on the outer wall of the mold body, and the input end of the electromagnetic coil is electrically connected to an external electromagnetic induction device, and the output end is electrically connected to the heating core.

[0017] Preferably, the supporting base plate comprises a truncated cone base plate, a plurality of limit blocks evenly spaced and connected to the circumferential wall of the truncated cone base plate, and a truncated cone pad integrally connected to the top of the truncated cone base plate.

[0018] Preferably, a plurality of slots are provided at equal intervals on the side walls of the bottom opening of the mold body, the bottom opening of the mold body is sleeved on the truncated cone pad so that a plurality of the limit blocks are correspondingly inserted into a plurality of the slots, and the top surface of the truncated cone pad contacts the bottom surface of the straight-walled blank in the cavity, and the truncated cone pad is made of a heat-expandable material, which can lift up the straight-walled blank when it expands due to heat, thereby playing a role in demolding.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model is provided with a mold body, a cup mouth sealing component and a heating core, and the cavity of the mold body is a truncated cone cavity structure with a cavity diameter gradually decreasing from top to bottom. When in use, the cup mouth sealing component is driven to move linearly along the longitudinal direction until it blocks and seals the top opening of the straight-walled blank, and at the same time the heating core is completely inserted into the inner cavity of the straight-walled blank, and then the heating core is heated to make the straight-walled blank complete the expansion, fit the cavity of the mold body, and deform into the required finished product shape. The mold is simple, easy to process and low in cost, and solves the technical problem that the existing stamping mold cannot perform slope processing on the side wall of the ultra-thin aluminum cup.

[0021] The utility model arranges a cup mouth sealing component and drives the sealing base to move downward through an external lifting frame, so that the plug mouth of the sealing base is embedded in the cup mouth of the straight-walled blank, and utilizes the inclination of the side of the plug to form an interference fit to support and expand the cup mouth. At the same time, the sealing ring moves upward under the upward drive of the cylinder, and the inner ring diameter of the sealing ring is smaller than the upper end outer diameter of the plug and larger than the lower end outer diameter of the plug. The sealing ring gradually moves upward and is tightly clamped on the outer wall of the cup mouth of the straight-walled blank. Through the cooperation of the sealing base and the sealing ring, the sealing of the open mouth during the secondary processing of the straight-walled blank can be guaranteed.

[0022] By winding the electromagnetic coil around the outer wall of the mold body, the bulging process of the mold will not be affected. The coil and the mold cooperate well, the magnetic heat efficiency of the internal heating core is high, and the bulging speed is fast.

[0023] The magnetic thermal expansion mold designed by the utility model does not need to use two half-molds to close the mold, thereby eliminating the joining line on the appearance of the cup body; the mold cost is low, and it is suitable for large-scale module customization, thereby increasing production capacity; after forming, the cup body is circularly cut along the upper surface of the mold to ensure that the cup size is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a magnetic thermal expansion die embodiment of the utility model;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of the magnetic thermal expansion die of the utility model;

[0026] Figure 3 It is a front view structural schematic diagram of the magnetic thermal expansion die of the utility model;

[0027] Figure 4 It is a perspective structural schematic diagram of the magnetic thermal expansion die of the utility model;

[0028] Figure 5 It is a schematic diagram of the structure of the magnetic thermal expansion mold of the utility model in a disassembled state when viewed from above;

[0029] Figure 6It is a schematic diagram of the top view of the magnetic thermal expansion die of the utility model in a disassembled state;

[0030] Figure 7 It is a schematic diagram of the disassembled structure of the cup mouth sealing assembly of the utility model.

[0031] Description of the numbers in the figure:

[0032] 1. Support base plate; 11. Cone base plate; 12. Limit block; 13. Cone pad; 2. Mold body; 21. Cavity; 22. Slot; 3. Straight-walled blank; 4. Cup mouth sealing assembly; 41. Sealing base; 411. Base plate; 4111. Through groove; 412. Plug; 42. Sealing ring; 43. Push plate; 431. Connecting plate; 432. Sliding connecting rod; 5. Heating core; 6. Electromagnetic coil. DETAILED DESCRIPTION

[0033] In order to facilitate those skilled in the art to understand the technical solution of the utility model, the technical solution of the utility model is further described in conjunction with the drawings of the specification. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] like Figure 1-Figure 7 As shown, the utility model relates to a magnetic thermal expansion mold, which includes a supporting base plate 1, a mold body 2, a straight wall blank 3, a cup mouth sealing component 4, a heating core 5 and an electromagnetic coil 6.

[0035] Specifically, Figure 1-Figure 6 As shown, the supporting base plate 1 of the present embodiment includes a truncated cone base plate 11, a plurality of limit blocks 12 evenly spaced and integrally connected to the circumferential wall of the truncated cone base plate 11, and a truncated cone pad 13 integrally connected to the top of the truncated cone base plate 11; and in the embodiment of the utility model, the truncated cone pad 13 is made of heat-expandable material, which can lift up the straight-walled blank 3 when it expands due to heat, thereby playing a role in demolding.

[0036] like Figure 1-Figure 6 As shown, the mold body 2 of this embodiment has a cavity 21 with top and bottom openings, and the cavity 21 is a conical cavity structure with a cavity diameter gradually decreasing from top to bottom. A plurality of slots 22 are evenly spaced on the side wall of the bottom opening of the mold body 2. The bottom opening of the mold body 2 is sleeved on the conical pad 13 and causes a plurality of limit blocks 12 to be correspondingly inserted into the plurality of slots 22.

[0037] like Figure 1-Figure 6As shown, the straight-wall blank 3 of this embodiment is disposed in the cavity 21 , and the top of the straight-wall blank 3 has an opening. When the straight-wall blank 3 is completely located in the cavity 21 , its bottom surface contacts the top surface of the truncated cone pad 13 .

[0038] like Figure 1-Figure 7 As shown, the cup mouth sealing assembly 4 of this embodiment includes an external power group, a sealing base 41, a sealing ring 42 and a push plate 43; wherein the external power group includes a lifting frame and a cylinder mounted on the output end of the lifting frame; the sealing base 41 includes a base plate 411 and a plug 412; the end of the base plate 411 is connected to the output end of the lifting frame through a connecting rod, and a plurality of through grooves 4111 are provided on the base plate 411 and near its edge; the plug 412 is integrally connected to the middle of the bottom surface of the base plate 411, and the bottom of the plug 412 has an opening, and the plug 412 is a gradually decreasing outer diameter from its top end to the open end. Cone cylinder structure; the outer diameter of the upper end of the plug 412 is larger than the inner diameter of the cup mouth of the straight-walled blank 3, and the outer diameter of the lower end of the plug 412 is smaller than the inner diameter of the cup mouth of the straight-walled blank 3; the sealing ring 42 is sleeved on the outside of the plug 412, and the inner ring diameter of the sealing ring 42 is smaller than the outer diameter of the upper end of the plug 412 and larger than the outer diameter of the lower end of the plug 412; the push plate 43 includes a connecting plate 431, and a plurality of sliding connecting rods 432 evenly spaced and connected to the bottom of the connecting plate 431; the top end of the connecting plate 431 is detachably connected to the piston end of the cylinder, and the sliding connecting rod 432 passes through the through groove 4111 and is fixedly connected to the top of the sealing ring 42. The sealing base 41 is driven downward by an external lifting frame so that the mouth of the plug 412 of the sealing base 41 is embedded in the cup mouth of the straight-walled blank 3. The inclination of the side of the plug 412 is used to form an interference fit to support and expand the cup mouth. At the same time, the sealing ring 42 is driven upward by the cylinder, and the inner ring diameter of the sealing ring 42 is smaller than the upper end outer diameter of the plug 412 and larger than the lower end outer diameter of the plug 412. The sealing ring 42 gradually moves upward and is tightly clamped on the outer wall of the cup mouth of the straight-walled blank 3. The cooperation of the sealing base 41 and the sealing ring 42 can ensure the sealing of the open mouth during the secondary processing of the straight-walled blank 3.

[0039] like Figure 4-Figure 6 As shown, the heating core 5 of this embodiment is vertically assembled at the bottom of the cup mouth sealing assembly 4.

[0040] like Figure 1-Figure 6 As shown, the electromagnetic coil 6 of this embodiment is wound on the outer wall of the mold body 2, and the input end of the electromagnetic coil 6 is electrically connected to the external electromagnetic induction device, and the output end is electrically connected to the heating core 5. By winding the electromagnetic coil 6 on the outer wall of the mold body 2, the bulging process of the mold will not be affected, the coil and the mold cooperate well, the magnetic heat efficiency of the internal heating core 5 is high, and the bulging speed is fast.

[0041] In the embodiment of the utility model, customized contents such as inclined walls, textures, logos and texts can be made on the inner wall of the cavity 21 of the mold body 2 as required. The material of the mold body 2 is non-magnetic materials such as aluminum alloy. The cup mouth of the straight-walled blank 3 is sealed by the cup mouth sealing component 4, and the metal heating core 5 inside the mold is heated by the electromagnetic coil 6, thereby heating the air in the cup and the blank cup part, causing the side walls to swell and expand in volume, and fit to the inner wall of the mold, thereby realizing processing such as inclination, pattern, and steps.

[0042] Working principle: This embodiment provides a magnetic thermal expansion die. When in use, the sealing base 41 is driven downward by an external lifting frame, so that the mouth of the plug 412 of the sealing base 41 is embedded in the cup mouth of the straight-walled blank 3. The inclination of the side of the plug 412 is used to form an interference fit to support and expand the cup mouth. At the same time, the sealing ring 42 moves upward under the upward drive of the cylinder, and the inner ring diameter of the sealing ring 42 is smaller than the upper end outer diameter of the plug 412 and larger than the lower end outer diameter of the plug 412. The sealing ring 42 gradually moves upward and is tightly clamped on the straight-walled blank. 3, and at the same time, the heating core 5 is completely inserted into the inner cavity of the straight-walled blank 3. The sealing performance of the open mouth of the straight-walled blank 3 during the secondary processing can be guaranteed by the cooperation of the sealing base 41 and the sealing ring 42; then the heating core 5 is heated to complete the bulging of the straight-walled blank 3, fit the cavity 21 of the mold body 2, and deform into the required finished product shape. After the bulging is completed, the cylinder moves downward to relax the sealing ring 42, and the product can be removed. After cooling, the protruding special-shaped part exceeding the mold is cut off to obtain the final product with the ideal specifications.

[0043] The magnetic thermal expansion mold designed by the utility model does not need to use two half-molds to close the mold, thereby eliminating the joining line on the appearance of the cup body; the mold cost is low, and it is suitable for large-scale module customization, thereby increasing production capacity; after forming, the cup body is circularly cut along the upper surface of the mold to ensure that the cup size is uniform.

[0044] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A magnetic thermal expansion die, characterized in that: It comprises a supporting bottom plate (1), a mold body (2), a straight-wall blank (3), a cup mouth sealing component (4) and a heating core (5); The mold body (2) is arranged on the supporting bottom plate (1), the mold body (2) has a cavity (21) with top and bottom openings, and the cavity (21) is a truncated cone cavity structure with a cavity diameter gradually decreasing from top to bottom; The straight-wall blank (3) is arranged in the cavity (21), and the top of the straight-wall blank (3) has an opening; The cup mouth sealing assembly (4) is supported and arranged above the mold body (2); The heating core (5) is vertically mounted on the bottom of the cup mouth sealing assembly (4); The cup mouth sealing component (4) moves linearly in the longitudinal direction until it blocks and seals the top opening of the straight-wall blank (3), while causing the heating core (5) to be completely inserted into the inner cavity of the straight-wall blank (3).

2. A magnetic thermal expansion die according to claim 1, characterized in that: The cup mouth sealing assembly (4) comprises an external power group, a sealing base (41), a sealing ring (42) and a push plate (43); Wherein, the external power group includes a lifting frame and a cylinder mounted on the output end of the lifting frame; The sealing base (41) comprises a base plate (411) and a plug (412); the end of the base plate (411) is connected to the output end of the lifting frame through a connecting rod, and a plurality of through grooves (4111) are provided on the base plate (411) and near its edge; the plug (412) is integrally connected to the middle of the bottom surface of the base plate (411), the bottom of the plug (412) has an opening, and the plug (412) is a truncated cone structure with an outer diameter gradually decreasing from its top end to the open end; the outer diameter of the upper end of the plug (412) is larger than the inner diameter of the cup mouth of the straight-walled blank (3), and the outer diameter of the lower end of the plug (412) is smaller than the inner diameter of the cup mouth of the straight-walled blank (3); The sealing ring (42) is sleeved on the outside of the plug (412), and the inner ring diameter of the sealing ring (42) is smaller than the outer diameter of the upper end of the plug (412) and larger than the outer diameter of the lower end of the plug (412); The push plate (43) comprises a connecting plate (431) and a plurality of sliding connecting rods (432) evenly spaced and connected to the bottom of the connecting plate (431); the top end of the connecting plate (431) is detachably connected to the piston end of the cylinder, and the sliding connecting rod (432) passes through the through groove (4111) and is fixedly connected to the top of the sealing ring (42).

3. The magnetic thermal expansion die according to claim 1, characterized in that: It also comprises an electromagnetic coil (6), the electromagnetic coil (6) being wound on the outer wall of the mold body (2), and the input end of the electromagnetic coil (6) being electrically connected to an external electromagnetic induction device, and the output end being electrically connected to the heating core (5).

4. The magnetic thermal expansion die according to claim 1, characterized in that: The supporting base plate (1) comprises a truncated cone base plate (11), a plurality of stop blocks (12) evenly spaced and connected to the circumferential wall of the truncated cone base plate (11), and a truncated cone cushion block (13) integrally connected to the top of the truncated cone base plate (11).

5. The magnetic thermal expansion die according to claim 4, characterized in that: A plurality of slots (22) are provided at equal intervals on the side wall of the bottom opening of the mold body (2), the bottom opening of the mold body (2) is sleeved on the truncated cone pad (13) so that a plurality of the limit blocks (12) are correspondingly inserted into a plurality of the slots (22), and the top surface of the truncated cone pad (13) contacts the bottom surface of the straight-walled blank (3) located in the cavity (21).

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