A forming die for a top cover of a can for a gas aerosol can for a bell annealing

Abstract

A kind of forming die suitable for cover-type annealing type aerosol can top cover, including die body and the stamping position formed in the end of die body;The die body is hollow structure, and the stamping position is arranged around the hollow structure of die body;The stamping position is composed of the countersunk section and the crimping section connected, and the countersunk section is composed of several sequentially connected arc segments, and the opening of adjacent arc segments faces opposite;Compared with prior art, by forming several arc segments that are sequentially connected and have opposite openings, the countersunk section generates arching effect during stress, and each arc segment converts part of the load into lateral thrust, which is transmitted by adjacent arc segments. Since the opening direction of adjacent arc segments is opposite, the direction of lateral thrust generated by adjacent arc segments alternates, which partially offsets the lateral thrust generated by adjacent arc segments, reduces the displacement requirement of the overall structure, thereby improving the stability of the overall structure and meeting the pressure resistance of the can cover.

Description

Technical Field

[0001] This utility model relates to the field of molding die technology, specifically to a molding die suitable for the top cover of a hood-type annealed aerosol can. Background Technology

[0002] An aerosol can is a metal container that uses internal compressed or liquefied gas pressure to release stored contents in the form of mist, foam, or spray. Because there is pressure inside the aerosol can for releasing the contents, it is necessary to ensure that the aerosol can body has a certain pressure resistance.

[0003] Existing aerosol cans are typically composed of three tinplate cans. Tinplate is made of low-carbon steel cold-rolled into thin sheets. After cold rolling, the steel sheet needs to be annealed to eliminate the internal stress generated by cold rolling, restore ductility, adjust the grain structure, and make the material easier to process later. In existing technologies, bell annealing (BA) or continuous annealing (CA) is usually used to anneal the steel sheet to meet the quality and performance standards of different products. Among them, bell annealing (BA) currently has a significant cost advantage and is favored by the market. However, bell annealing (BA) has problems such as low strength and large fluctuations in material properties at the beginning, middle, and end of the coil. Meanwhile, the continuous acceleration of production equipment places higher demands on the stability of products.

[0004] During the deformation and burst test of the aerosol can top cover, it was found that the recessed part of the top cover was the weakest point. The recessed part deformed first under pressure, affecting the overall structural stability of the aerosol can top cover.

[0005] Chinese patent CN206567387U discloses a novel aerosol can cap mold, comprising an upper mold and a lower mold. The upper mold consists of an upper mold core, a ejector ring, an upper mold ejector edge ring, an upper mold cutting edge, an upper mold ejector pin, and an upper mold base. The lower mold includes a lower mold core, an ejector ring, a lower mold shearing opening, a lower mold base, an ejector pin, and an ejector pin base plate. The ejector ring is mounted on the lower mold core. The upper and lower mold cores are on the same axis. The mold frame also includes a mold base, which consists of an upper top plate, a lower bottom plate, and guide rods. The upper mold is fixed below the upper top plate, and the lower mold is correspondingly fixed above the lower bottom plate. The guide rods vertically connect the upper top plate and the lower bottom plate.

[0006] The aforementioned can lid, under the stamping action of the upper mold core, forms a recessed part with a uniform arc structure. When the recessed part is subjected to internal pressure of the can, the uniform arc structure of the recessed part is subjected to force as a whole, which easily transmits the force of the recessed part to the connection of the three can pieces, causing deformation of the can lid and affecting the overall use effect of the can lid. Utility Model Content

[0007] The present invention aims to overcome the defects in the prior art and provide a molding die suitable for the top cover of a hood-type annealed aerosol can, which has a stable structure, dispersed stress, and good pressure resistance.

[0008] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a molding die suitable for the top cover of a hood-type annealed aerosol can, comprising a die body and a stamping position formed at the end of the die body; the die body is a hollow structure, and the stamping position is arranged around the hollow structure of the die body; the stamping position is composed of a countersunk section and a pressing section connected together, the countersunk section is composed of several arc-shaped sections connected in sequence, and the openings of adjacent arc-shaped sections face opposite directions.

[0009] As a preferred embodiment of this utility model, the countersunk section is composed of a first arc-shaped section, a second arc-shaped section, a third arc-shaped section and a fourth arc-shaped section connected in sequence. The openings of the first arc-shaped section and the third arc-shaped section have the same orientation, and the openings of the second arc-shaped section and the fourth arc-shaped section have the same orientation.

[0010] As a preferred embodiment of this utility model, the first arc segment, the second arc segment, the third arc segment and the fourth arc segment are inclined from the inside to the outside along the middle of the mold body.

[0011] As a preferred embodiment of this utility model, the first arc-shaped segment is connected to the inner wall of the hollow part of the mold body, and the fourth arc-shaped segment is connected to the pressing segment.

[0012] In a preferred embodiment of this utility model, the opening directions of the first arc segment and the third arc segment are oriented towards the mold body, and the opening directions of the second arc segment and the fourth arc segment are oriented towards the outside of the mold body.

[0013] As a preferred embodiment of this utility model, the first arc segment, the second arc segment, the third arc segment and the fourth arc segment are all circular arc structures.

[0014] In a preferred embodiment of this utility model, the arc structure formed by the first arc segment and the third arc segment has the same diameter.

[0015] As a preferred embodiment of this utility model, the crimping section has an arc structure, and the opening direction of the crimping section is opposite to the opening direction of the fourth arc segment.

[0016] As a preferred embodiment of this utility model, the end of the mold body is formed with a plurality of positioning holes distributed circumferentially along the center of the mold body.

[0017] In a preferred embodiment of this utility model, the positioning hole and the stamping position are formed at opposite ends of the mold body.

[0018] Compared with existing technologies, by forming several arc-shaped segments connected in sequence with opposite opening directions, the recessed section generates an arch effect during the stress process. Each arc-shaped segment converts part of the load into lateral thrust, which is transmitted through adjacent arc-shaped segments. Since the opening directions of adjacent arc-shaped segments are opposite, the direction of the lateral thrust they generate alternates, thereby partially canceling out the lateral thrust generated by adjacent arc-shaped segments, reducing the displacement requirements of the overall structure, thus improving the stability of the overall structure and meeting the pressure resistance requirements of the can lid. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the present invention;

[0020] Figure 2 This is the left view of this utility model;

[0021] Figure 3 yes Figure 1 A magnified view of a section at point A in the middle;

[0022] Reference numerals: 1. Mold body, 2. Stamping position, 21. Countersunk section, 22. Pressing section, 23. First arc section, 24. Second arc section, 25. Third arc section, 26. Fourth arc section, 3. Positioning hole. Detailed Implementation

[0023] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] like Figures 1-3 As shown, a molding die for a cap-type annealed aerosol can top cover includes a die body 1 and a stamping position 2 formed at the end of the die body 1; the die body 1 is a hollow structure, and the stamping position 2 is arranged around the hollow structure of the die body 1; the stamping position 2 is composed of a countersunk section 21 and a pressing section 22 connected to each other, the countersunk section 21 is composed of a number of arc-shaped sections connected in sequence, and the openings of adjacent arc-shaped sections face opposite directions.

[0025] The number of arc-shaped sections in the countersunk section 21 is set according to actual needs. The countersunk section 21 is used to stamp and form the countersunk part of the can lid. The pressing section 22 is used to stamp and form the pressing part of the can lid. The pressing part is pressed with the three-piece can to form the seal of the integral can body. The hollow structure corresponds to the middle of the can lid. The hollow structure is used to form the easy-pull part of the can lid, so as to facilitate the reservation of the easy-pull part of the can lid.

[0026] The countersunk section 21 is composed of a first arc-shaped section 23, a second arc-shaped section 24, a third arc-shaped section 25 and a fourth arc-shaped section 26 connected in sequence. The openings of the first arc-shaped section 23 and the third arc-shaped section 25 face the same direction, and the openings of the second arc-shaped section 24 and the fourth arc-shaped section 26 face the same direction.

[0027] The openings of the first arc segment 23 and the second arc segment 24 face opposite directions. Similarly, the openings of the second arc segment 24 and the third arc segment 25 face opposite directions. Likewise, the openings of the third arc segment 25 and the fourth arc segment 26 face opposite directions, thus forming a wave-like structure at the stamping position 2.

[0028] The first arc segment 23, the second arc segment 24, the third arc segment 25, and the fourth arc segment 26 are inclined from the inside to the outside along the middle of the mold body 1. The first arc segment 23, the second arc segment 24, the third arc segment 25, and the fourth arc segment 26, which are arranged around the hollow structure of the mold body 1, form a stamping cavity. The size and structure of the stamping head corresponding to the mold body 1 are designed according to the first arc segment 23, the second arc segment 24, the third arc segment 25, and the fourth arc segment 26.

[0029] The first arc segment 23 is connected to the inner wall of the hollow part of the mold body 1, and the fourth arc segment 26 is connected to the pressing segment 22. The countersunk segment 21, the pressing segment 22 and the mold body 1 are an integral structure, thereby ensuring the stable setting of the countersunk segment 21 and the pressing segment 22 at the end of the mold body 1.

[0030] The opening directions of the first arc segment 23 and the third arc segment 25 are set towards the mold body 1, and the opening directions of the second arc segment 24 and the fourth arc segment 26 are set towards the outside of the mold body 1.

[0031] The first arc segment 23, the second arc segment 24, the third arc segment 25 and the fourth arc segment 26 are all circular arc structures, and the circular arc structures formed by the first arc segment 23 and the third arc segment 25 have the same diameter.

[0032] The diameter of the arc structure formed by the first arc segment 23 is 5mm, the diameter of the arc structure formed by the second arc segment 24 is 18.5mm, the diameter of the arc structure formed by the third arc segment 25 is 5mm, and the diameter of the arc structure formed by the fourth arc segment 26 is 10mm.

[0033] The crimping section 22 has an arc structure, and the opening direction of the crimping section 22 is opposite to the opening direction of the fourth arc section 26.

[0034] The mold body 1 has several positioning holes 3 distributed around the center of the mold body 1. The positioning holes 3 and the stamping position 2 are formed at opposite ends of the mold body 1. The number of positioning holes 3 is designed according to actual needs. The positioning holes 3 are used to position the mold body 1, so as to facilitate the stamping of the stamping position 2 at the other end of the mold body 1.

[0035] In actual use, since the opening directions of the first arc segment 23, the second arc segment 24, the third arc segment 25, and the fourth arc segment 26 connected in sequence alternate, when the first arc segment 23, the second arc segment 24, the third arc segment 25, and the fourth arc segment 26 are under force, the pressure received by the first arc segment 23, the second arc segment 24, the third arc segment 25, and the fourth arc segment 26 is located on the same side. Therefore, at this time, the top of the first arc segment 23 and the third arc segment 25 faces the pressure point, and the bottom of the second arc segment 24 and the fourth arc segment 26 faces the pressure point.

[0036] This causes the first arc segment 23, the second arc segment 24, the third arc segment 25, and the fourth arc segment 26 to generate an arch effect during the stress process. Each arc segment will convert part of the load into lateral thrust, which is transmitted through adjacent arc segments. Since the opening directions of adjacent arc segments are opposite, the direction of the lateral thrust they generate changes alternately, so that the lateral thrust generated by adjacent arc segments partially cancels each other out, reducing the displacement requirement of the overall structure and thus improving the stability of the overall structure.

[0037] Simultaneously, under the action of forces on the same side, the pressure is transmitted step by step through the first arc segment 23, the second arc segment 24, the third arc segment 25 and the fourth arc segment 26 of the wave-shaped structure. The alternating opening directions cause the internal force distribution to change periodically, thereby optimizing the overall structural stiffness.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0039] Although this document frequently uses reference numerals from the accompanying drawings, such as mold body 1, stamping position 2, countersunk section 21, pressing section 22, first arc section 23, second arc section 24, third arc section 25, fourth arc section 26, and positioning hole 3, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A molding die for a cap-type annealed aerosol can top cover, comprising a die body (1) and a stamping position (2) formed at the end of the die body (1); characterized in that, The mold body (1) is a hollow structure, and the stamping position (2) is arranged around the hollow structure of the mold body (1). The stamping position (2) is composed of a countersunk section (21) and a pressing section (22) connected to each other. The countersunk section (21) is composed of several arc-shaped sections connected in sequence, and the openings of adjacent arc-shaped sections face opposite directions.

2. The molding die for a top cover of a hood-type annealed aerosol can according to claim 1, characterized in that, The recessed section (21) is composed of a first arc-shaped section (23), a second arc-shaped section (24), a third arc-shaped section (25) and a fourth arc-shaped section (26) connected in sequence. The openings of the first arc-shaped section (23) and the third arc-shaped section (25) are in the same direction, and the openings of the second arc-shaped section (24) and the fourth arc-shaped section (26) are in the same direction.

3. A molding die for a top cover of a hood-type annealed aerosol can according to claim 2, characterized in that, The first arc segment (23), the second arc segment (24), the third arc segment (25) and the fourth arc segment (26) are inclined from the inside to the outside along the middle of the mold body (1).

4. A molding die for a top cover of a hood-type annealed aerosol can according to claim 2, characterized in that, The first arc segment (23) is connected to the inner wall of the hollow part of the mold body (1), and the fourth arc segment (26) is connected to the pressing segment (22).

5. A molding die for a top cover of a hood-type annealed aerosol can according to claim 2, characterized in that, The opening directions of the first arc segment (23) and the third arc segment (25) are set towards the mold body (1), and the opening directions of the second arc segment (24) and the fourth arc segment (26) are set towards the outside of the mold body (1).

6. A molding die for a top cover of a hood-type annealed aerosol can according to claim 2, characterized in that, The first arc segment (23), the second arc segment (24), the third arc segment (25) and the fourth arc segment (26) are all circular arc structures.

7. A molding die for a top cover of a hood-type annealed aerosol can according to claim 2, characterized in that, The arc structures formed by the first arc segment (23) and the third arc segment (25) have the same diameter.

8. A molding die for a top cover of a hood-type annealed aerosol can according to claim 2, characterized in that, The crimping section (22) has an arc structure, and the opening direction of the crimping section (22) is opposite to the opening direction of the fourth arc section (26).

9. A molding die for a top cover of a hood-type annealed aerosol can according to claim 1, characterized in that, The mold body (1) has several positioning holes (3) distributed circumferentially around the center of the mold body (1) at its end.

10. A molding die for a top cover of a hood-type annealed aerosol can according to claim 9, characterized in that, The positioning hole (3) and the stamping position (2) are formed at opposite ends of the mold body (1).

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