A metal can seaming positioning die

Abstract

A metal can edge-rolling positioning mold includes a guide mold with a guide hole in the center and a lifting rod slidably mounted thereon. A movable mold is slidably mounted on the upper part of the guide mold, and the movable mold includes an outer mold and an inner mold. The outer mold and the inner mold are spaced apart and centrally symmetrically distributed. After the outer and inner molds are fitted with elastic retaining rings, they form an integral structure. Adjacent outer molds enclose an inner mold cavity. The inner surfaces of the outer mold and the inner mold enclose a conical hole. The upper part of the lifting rod extends into the conical hole and a pressure block is rotatably mounted thereon. The outer surface of the pressure block is machined into a conical surface to match the conical hole. The lifting rod drives the pressure block to move downward, and the outer mold and the inner mold squeeze each other and move radially outward at the same time. The outer surfaces of the outer mold and the inner mold cooperate to form a complete edge-rolling forming mold. This structure converts the axial lifting motion of the lifting rod into the radial movement of the outer mold and the inner mold to support the inner surface of the can bottom. The outer surfaces of the outer mold and the inner mold are tightly fitted and cooperate to form a complete edge-rolling forming mold, resulting in a good edge-rolling effect.

Description

Technical Field

[0001] This utility model relates to a metal can edge-rolling positioning mold. Background Technology

[0002] Metal cans are thin-walled packaging containers made of sheet metal. They are widely used in industrial product packaging, food packaging, pharmaceutical packaging, daily necessities packaging, instrument and meter packaging, and military packaging. Metal cans generally consist of a body, a lid, and a bottom. The bottom and top openings of metal cans are often edged to prevent scratches. During the edge-rolling process, a fixed-structure edge-rolling mold is typically used to ensure the smoothness of the rolled edge; however, this structure can make demolding difficult. Utility Model Content

[0003] To address the shortcomings mentioned above, this utility model provides a metal can edge-sealing positioning mold.

[0004] To achieve the above objectives, this utility model provides a metal can edge-sealing positioning mold, including a guide mold. The guide mold has a guide hole at its center and a lifting rod is slidably installed thereon. A movable mold is slidably disposed on the upper part of the guide mold. The movable mold includes an outer mold and an inner mold. The outer mold and the inner mold are spaced apart and centrally symmetrically distributed. After the outer mold and the inner mold are fitted with elastic retaining rings on their outer peripheral surfaces, they form an integral structure. Adjacent outer molds enclose a cavity for receiving the inner mold. The width of the cavity gradually decreases from the middle to the two openings. The inner surfaces of the outer mold and the inner mold enclose a conical hole. The upper part of the lifting rod extends into the conical hole and a pressure block is rotatably installed thereon. The outer surface of the pressure block is machined into a conical surface to match the conical hole.

[0005] The lifting rod drives the pressure block to move downward, the outer mold and the inner mold squeeze each other and move radially outward at the same time, and the outer surfaces of the outer mold and the inner mold cooperate to form a complete edge-rolling forming mold.

[0006] As a further improvement of this utility model, the outer mold has a fan-shaped structure in the middle, and the two sides of the outer mold adjacent to the outer peripheral surface extend in the circumferential direction to form a protruding edge. The side of the protruding edge facing the center of the outer mold forms a guide slope, and the two sides of the inner mold adjacent to the outer peripheral surface are processed to form an extrusion slope that matches the guide slope.

[0007] As a further improvement of this utility model, a limiting ring is installed on the upper part of the guide mold, and the upper part of the limiting ring extends inward radially to form an inner boss. Limiting grooves are correspondingly machined on the outer surfaces of the outer mold and the inner mold along the circumferential direction, and the inner boss extends into the limiting groove.

[0008] As a further improvement of this utility model, the outer mold and the inner mold have circumferentially machined grooves on their outer surfaces to accommodate the elastic retaining rings, and the elastic retaining rings are provided in at least two sets along the height direction of the movable mold.

[0009] As a further improvement of this utility model, both the lower parts of the outer mold and the inner mold are machined with sliding grooves, and the upper part of the guide mold is radially mounted with a slide rail to form a sliding fit with the sliding grooves.

[0010] The beneficial effects of this utility model are as follows:

[0011] This structure converts the axial lifting motion of the lifting rod into the radial movement of the outer and inner molds to support the inner side of the tank bottom. The outer and inner molds are tightly fitted and work together to form a complete edge-rolling mold. The edge-rolling process is smooth, the edge-rolling effect is good, and demolding is convenient. Attached Figure Description

[0012] Figure 1 This is an assembly structure diagram of a metal can edge-sealing positioning mold according to the present invention;

[0013] Figure 2 This is a top view of the active module 1;

[0014] Figure 3 This is a top view of the outer mold 11;

[0015] Figure 4 This is a top view of the inner mold 12;

[0016] Figure 5 This is a schematic diagram of the working process of a metal can edge-rolling positioning mold according to the present invention.

[0017] In the diagram: 1. Movable mold; 11. Outer mold; 111. Protruding edge; 112. Guide slope; 12. Inner mold; 121. Extrusion slope; 13. Receiving cavity; 14. Groove; 15. Conical hole; 16. Limiting groove; 17. Slide groove; 18. Edge forming mold; 2. Elastic retaining ring; 3. Pressure block; 31. Conical surface; 4. Lifting rod; 5. Limiting ring; 51. Inner boss; 6. Slide rail; 7. Guide mold; 71. Guide hole. Detailed Implementation

[0018] like Figure 1As shown, the metal can edge-rolling positioning mold of this utility model includes a guide mold 7. The guide mold 7 has a guide hole 71 at its center and a lifting rod 4 is slidably installed thereon. A movable mold 1 is slidably disposed on the upper part of the guide mold 7. The movable mold 1 includes an outer mold 11 and an inner mold 12. The outer mold 11 and the inner mold 12 are spaced apart and centrally symmetrically distributed. The lower part of both the outer mold 11 and the inner mold 12 is machined with a sliding groove 17. A slide rail 6 is radially installed on the upper part of the guide mold 7 to form a sliding fit with the sliding groove 17. After the outer mold 11 and the inner mold 12 are fitted with elastic retaining rings 2 on their outer peripheral surfaces, they form an integral structure. The outer surfaces of the outer mold 11 and the inner mold 12 are circumferentially machined with grooves 14 to accommodate the elastic retaining rings 2. At least two sets of elastic retaining rings 2 are provided along the height direction of the movable mold 1. The adjacent outer molds 11 enclose and form a receiving cavity 13 of the inner mold 12. The width of the receiving cavity 13 gradually decreases from the middle to the two openings (see Figure 2 The outer mold 11 has a fan-shaped structure in the middle. The two sides of the outer mold 11 adjacent to the outer peripheral surface extend in the circumferential direction to form a raised edge 111. The side of the raised edge 111 facing the center of the outer mold 11 forms a guide slope 112 (see Figure 3 The inner mold 12 and the two sides adjacent to the outer peripheral surface are machined to form extrusion inclined surfaces 121 that match the guide inclined surfaces 112 (see...). Figure 4 The outer mold 11 and the inner mold 12 form a conical hole 15 by their inner sides. The upper part of the lifting rod 4 extends into the conical hole 15 and is rotatably mounted with the pressure block 3. The outer side of the pressure block 3 is machined into a conical surface 31 to match the conical hole 15. A limiting ring 5 is installed on the upper part of the guide mold 7. The upper part of the limiting ring 5 extends radially inward to form an inner boss 51. Limiting grooves 16 are correspondingly machined along the circumferential direction on the outer side surfaces of the outer mold 11 and the inner mold 12. The inner boss 51 fits into the limiting groove 16.

[0019] The lifting rod 4 drives the pressure block 3 to move down, the outer mold 11 and the inner mold 12 squeeze each other and move radially outward at the same time, and the outer sides of the outer mold 11 and the inner mold 12 cooperate to form a complete edge-rolling forming mold 18.

[0020] This structure converts the axial lifting motion of the lifting rod into the radial movement of the outer and inner molds to support the inner side of the tank bottom. The outer and inner molds are tightly fitted and work together to form a complete edge-rolling mold. The edge-rolling process is smooth, the edge-rolling effect is good, and demolding is convenient.

[0021] In practical use, for ease of understanding of this utility model, it will be described in conjunction with the accompanying drawings;

[0022] During operation, the metal can to be processed is placed on the upper part of the movable mold. The initial position of the pressure block is higher than the movable mold and supports the bottom of the metal can. The inner diameter of the bottom edge of the metal can is larger than the initial outer diameter of the movable mold. As the lifting rod descends, the pressure block moves down synchronously. The conical inner mold on the outer side of the pressure block forms an outward extrusion force. After being subjected to force, the inner mold overcomes the elastic force of the elastic retaining ring and moves radially outward along the slide rail. During the movement of the inner mold, the extrusion slopes on both sides of the inner mold and the guide slopes of the outer mold extrude each other. The outer mold also moves radially outward along the corresponding slide rail with the inner mold until the inner boss on the upper part of the limiting ring engages with the limiting groove on the outer side of the inner and outer molds, which means the displacement is in place. At this time, the outer surfaces of the inner and outer molds cooperate to form a complete structure. The inner and outer molds cooperate near the upper edge to form a rolled edge forming mold and fully fit the inner surface of the bottom of the can to form a supporting force (see...). Figure 5 This ensures stable force and a smooth edge during the subsequent edge-rolling process. After edge-rolling is completed, the lifting rod moves the pressure block upward, and the inner and outer molds use the elastic memory of the elastic retaining ring to radially shrink and reset, allowing the metal can to be removed.

[0023] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A metal can edge-sealing positioning mold, characterized in that: The system includes a guide mold (7), which has a guide hole (71) at its center and a lifting rod (4) slidably mounted thereon. A movable mold (1) is slidably mounted on the upper part of the guide mold (7). The movable mold (1) includes an outer mold (11) and an inner mold (12). The outer mold (11) and the inner mold (12) are spaced apart and centrally symmetrically distributed. After the outer mold (11) and the inner mold (12) are fitted with elastic retaining rings (2) on their outer circumferential surfaces, they form an integral structure. The outer mold (11) and the inner mold (12) are enclosed to form a cavity (13). The width of the cavity (13) gradually decreases from the middle to the two openings. The inner surfaces of the outer mold (11) and the inner mold (12) are enclosed to form a conical hole (15). The upper part of the lifting rod (4) extends into the conical hole (15) and is rotatably mounted with a pressure block (3). The outer surface of the pressure block (3) is machined into a conical surface (31) to match the conical hole (15). The lifting rod (4) drives the pressure block (3) to move down, the outer mold (11) and the inner mold (12) squeeze each other and move radially outward at the same time, and the outer surfaces of the outer mold (11) and the inner mold (12) cooperate to form a complete edge-rolling forming mold (18).

2. The metal can edge-sealing positioning mold according to claim 1, characterized in that: The outer mold (11) has a fan-shaped structure in the middle. The two sides of the outer mold (11) adjacent to the outer peripheral surface extend in the circumferential direction to form a protruding edge (111). The protruding edge (111) forms a guide slope (112) on the side facing the center of the outer mold (11). The two sides of the inner mold (12) adjacent to the outer peripheral surface are processed to form an extrusion slope (121) that matches the guide slope (112).

3. A metal can edge-sealing positioning mold according to claim 1, characterized in that: The guide mold (7) is equipped with a limiting ring (5) on its upper part. The upper part of the limiting ring (5) extends radially inward to form an inner boss (51). The outer mold (11) and the inner mold (12) are respectively machined with limiting grooves (16) along the circumferential direction on their outer surfaces. The inner boss (51) is inserted into the limiting groove (16).

4. A metal can edge-sealing positioning mold according to claim 1, characterized in that: The outer mold (11) and the inner mold (12) have circumferentially machined grooves (14) on their outer surfaces to accommodate the elastic retaining ring (2). The elastic retaining ring (2) has at least two sets along the height direction of the movable mold (1).

5. A metal can edge-sealing positioning mold according to claim 1, characterized in that: The lower part of the outer mold (11) and the inner mold (12) are both machined with grooves (17), and the upper part of the guide mold (7) is radially mounted with a slide rail (6) to form a sliding fit with the groove (17).

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