Bubbling drawing die and stamping equipment comprising same

Abstract

The utility model relates to the technical field of easy-open lid production, and discloses a foaming drawing die and stamping equipment comprising the foaming drawing die. A foaming drawing die comprises an upper die core and a lower die core, the lower die core comprises a stamping column, and a stamping hole corresponding to the stamping column is formed in the upper die core; the stamping column is provided with a column side face and a column top face, a first connecting face structure is arranged between the column side face and the column top face, the stamping hole comprises a hole side face and a hole top face, and a second connecting face structure corresponding to the first connecting face structure is arranged between the hole side face and the hole top face. The side wall of the protruding part is smoothly connected with the top. The easy-to-pull lid has the beneficial effects that the material bending degree between the side wall and the top of the protruding part is reduced, so that the situation that paint falls off after stamping foaming is reduced or avoided, the easy-to-pull lid product still has high corrosion resistance and rust resistance, and the quality of the easy-to-pull lid is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a zip-top lid production technical field, especially a kind of bubble drawing die and the stamping equipment comprising the bubble drawing die of including. BACKGROUND

[0002] Currently, the material for producing zip-top lid is generally tinplate, that is, tin-plated steel sheet, which refers to cold-rolled thin steel sheet with a thin layer of tin plating on the surface. Tin layer is non-toxic and odorless, and the surface is bright, mainly for preventing corrosion and rust.

[0003] The production of zip-top lid requires multiple processes, including the forming of basic lid, edge rolling, gluing, rivet forming, line marking, and ring compounding. In the rivet forming step, it includes three links of bubbling, button forming and button shaping.

[0004] The existing bubble die includes a upper die core and a lower die core that cooperate with each other. The lower die core is cylindrical, and its circumferential surface and top surface are perpendicular to each other and directly connected. Correspondingly, the upper die core is provided with a stamping hole corresponding to the lower die core, and the inner side surface of the stamping hole and the top surface are perpendicular to each other and directly connected. After using this bubble die to stamp and bubble the basic lid, the connection between the circumferential surface and the top surface of the protruding part on the basic lid, as well as the connection between the inner circumferential surface and the inner side top surface, is prone to paint peeling, which damages the tin layer and is not conducive to improving the quality of the zip-top lid. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a bubble drawing die, which aims to solve the technical problem of paint peeling after bubbling in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides a bubble drawing die, which includes a upper die core and a lower die core. The lower die core includes a stamping column, and the upper die core is provided with a stamping hole corresponding to the stamping column. The stamping column is provided with a column side surface and a column top surface, and a first connecting surface structure is arranged between the column side surface and the column top surface. The stamping hole includes a hole side surface and a hole top surface, and a second connecting surface structure corresponding to the first connecting surface structure is arranged between the hole side surface and the hole top surface. After using the bubble drawing die to stamp a protruding part on the basic lid, the side wall of the protruding part is smoothly connected with the top part.

[0007] The utility model has the beneficial effects that: using the bubble drawing die in the utility model to stamp and bubble the basic lid, the protruding part is stamped on the basic lid, which can make the side wall of the protruding part smoothly connected with the top part, reduce the material bending degree between the side wall and the top part of the protruding part, thereby reducing or avoiding the paint peeling after stamping and bubbling, making the zip-top lid product still have strong corrosion and rust resistance, which is conducive to improving the quality of the zip-top lid.

[0008] Preferably, the punching column is cylindrical, the column side surface comprises a column peripheral side surface, the first connecting surface structure comprises a first annular curved surface extending around the outer peripheral side of the column top surface, and the lower end of the first annular curved surface is connected with the upper end of the column peripheral side surface; the punching hole is a circular hole, the hole side surface comprises a hole peripheral side surface, the second connecting surface structure comprises a second annular curved surface extending around the outer peripheral side of the hole top surface, and the lower end of the second annular curved surface is connected with the upper end of the hole peripheral side surface.

[0009] Preferably, the diameter D1 of the punching column is 5.77mm-15mm, the radius R1 of the arc in the first annular curved surface is 0.8mm-5.5mm, the inner diameter D2 of the punching hole is 6.35mm-15mm, and the radius R2 of the arc in the second annular curved surface is 0.25mm-5.5mm.

[0010] Preferably, the diameter D1 of the punching column is 10.8mm-15mm, the radius R1 of the arc in the first annular curved surface is 2.6mm-5.5mm, the inner diameter D2 of the punching hole is 11mm-15mm, and the radius R2 of the arc in the second annular curved surface is 2.9mm-5.5mm.

[0011] Preferably, the diameter D1 of the punching column is 5.9mm-11mm, the radius R1 of the arc in the first annular curved surface is 1.5mm-3.1mm, the inner diameter D2 of the punching hole is 6.5mm-11mm, and the radius R2 of the arc in the second annular curved surface is 0.7mm-0.8mm.

[0012] Preferably, the diameter D1 of the punching column is 5.82mm-5.85mm, the radius R1 of the arc in the first annular curved surface is 0.8mm-1.2mm, the inner diameter D2 of the punching hole is 6.52mm-6.55mm, and the radius R2 of the arc in the second annular curved surface is 0.5mm-0.7mm.

[0013] Preferably, the diameter D1 of the punching column is 5.77mm-5.8mm, the radius R1 of the arc in the first annular curved surface is 0.8mm-1.6mm, the inner diameter D2 of the punching hole is 6.35mm, and the radius R2 of the arc in the second annular curved surface is 0.25mm-0.4mm.

[0014] The utility model discloses a kind of stamping equipment, including above bubble draw mould.

[0015] Preferably, the stamping device comprises at least three bubble drawing dies, which are respectively referred to as a first drawing die, a second drawing die and a third drawing die, and the first drawing die, the second drawing die and the third drawing die are arranged in sequence; in the first drawing die, the diameter D1 of the stamping column is 10.8mm-15mm, the radius R1 of the arc in the first annular arc surface is 2.6mm-5.5mm, the inner diameter D2 of the stamping hole is 11mm-15mm, and the radius R2 of the arc in the second annular arc surface is 2.9mm-5.5mm; in the second drawing die, the diameter D1 of the stamping column is 5.9mm-11mm, the radius R1 of the arc in the first annular arc surface is 1.5mm-3.1mm, the inner diameter D2 of the stamping hole is 6.5mm-11mm, and the radius R2 of the arc in the second annular arc surface is 0.7mm-0.8mm; in the third drawing die, the diameter D1 of the stamping column is 5.82mm-5.85mm, the radius R1 of the arc in the first annular arc surface is 0.8mm-1.2mm, the inner diameter D2 of the stamping hole is 6.52mm-6.55mm, and the radius R2 of the arc in the second annular arc surface is 0.5mm-0.7mm.

[0016] Preferably, the stamping device further comprises a fourth drawing die, and in the fourth drawing die, the diameter D1 of the stamping column is 5.77mm-5.8mm, the radius R1 of the arc in the first annular arc surface is 0.8mm-1.6mm, the inner diameter D2 of the stamping hole is 6.35mm, and the radius R2 of the arc in the second annular arc surface is 0.25mm-0.4mm. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in these drawings without creative labor for those skilled in the art.

[0018] Figure 1 The structure diagram of the bubble drawing die in the embodiment of the present application is shown in the figure.

[0019] Figure 2 The structure diagram of the lower mold core in the embodiment of the present application is shown in the figure.

[0020] Figure 3 The front view of the lower mold core in the embodiment of the present application is shown in the figure.

[0021] Figure 4 The front view of the lower mold core when the first connecting surface structure is an annular inclined surface in the embodiment of the present application is shown in the figure.

[0022] Figure 5The structure schematic view of the upper mold core in the embodiment of the utility model;

[0023] Figure 6 The front view of the upper mold core in the embodiment of the utility model;

[0024] Figure 7 The Figure 6 A-A section view in the embodiment of the utility model;

[0025] Figure 8 The structure schematic view of the basic cover after being processed by the foaming draw mold in the embodiment of the utility model;

[0026] Figure 9 The structure schematic view of the stamping equipment in the embodiment of the utility model.

[0027] In the drawings: 1 - upper mold core, 11 - stamping hole, 111 - hole side surface, 1111 - hole circumferential side surface, 112 - hole top surface, 113 - second connecting surface structure, 1131 - second annular curved surface, 2 - lower mold core, 21 - stamping column, 211 - column side surface, 2111 - column circumferential side surface, 212 - column top surface, 213 - first connecting surface structure, 2131 - first annular curved surface, 2132 - annular inclined surface, 10 - basic cover, 101 - convex part, 1011 - side wall, 1012 - top part, 1013 - third annular curved surface, 20 - first draw mold, 30 - second draw mold, 40 - third draw mold, 50 - fourth draw mold.

[0028] The utility model discloses the realization, functional characteristics and advantages will be further explained with reference to the embodiment. Specific implementation

[0029] The technical scheme in the embodiment of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiment of the utility model, and obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of the utility model protection.

[0030] It should be noted that if the embodiment of the utility model involves directional indications, such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0031] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0032] As shown in Figures 1 to 7 , a foaming draw die includes an upper die core 1 and a lower die core 2, the lower die core 2 includes a punching column 21, the upper die core 1 is provided with a punching hole 11 corresponding to the punching column 21; the punching column 21 is provided with a column side surface 211 and a column top surface 212, a first connecting surface structure 213 is arranged between the column side surface 211 and the column top surface 212, the punching hole 11 includes a hole side surface 111 and a hole top surface 112, and a second connecting surface structure 113 corresponding to the first connecting surface structure 213 is arranged between the hole side surface 111 and the hole top surface 112, so that after the foaming draw die is used to punch out a convex part 101 on the base cover 10, the side wall 1011 of the convex part 101 is smoothly connected with the top part 1012.

[0033] The foaming draw die in the embodiment is used to punch and foam the base cover, and the convex part 101 is punched out on the base cover, so that the side wall 1011 of the convex part 101 is smoothly connected with the top part 1012, the material bending degree between the side wall 1011 and the top part 1012 of the convex part 101 is reduced, thereby reducing or avoiding the paint falling off after the punching and foaming, and the pop-up lid product still has strong anti-corrosion and rust performance, which is beneficial to improving the quality of the pop-up lid.

[0034] In some specific embodiments, referring to Figures 1 to 3 , the punching column 21 is in a cylindrical shape, the column side surface 211 includes a column circumferential side surface 2111, the first connecting surface structure 213 includes a first annular arc surface 2131 extending around the outer circumferential side of the column top surface 212, and the lower end of the first annular arc surface 2131 is connected with the upper end of the column circumferential side surface 2111; the punching hole 11 is a circular hole, the hole side surface 111 includes a hole circumferential side surface 1111, and the second connecting surface structure 113 includes a second annular arc surface 1131 extending around the outer circumferential side of the hole top surface 112, and the lower end of the second annular arc surface 1131 is connected with the upper end of the hole circumferential side surface 1111.

[0035] Through the first annular arc surface 2131 and the second annular arc surface 1131, a third annular arc surface 1013 is finally formed on the protrusion 101 of the basic cover 10. The inner side of the third annular arc surface 1013 is connected to the top 1012 of the protrusion 101, and the outer side of the third annular arc surface 1013 is connected to the side wall 1011 of the protrusion 101, so as to achieve a smooth connection between the side wall 1011 and the top 1012 of the protrusion 101.

[0036] In other embodiments, reference is made to Figure 4 The first connecting surface structure 213 includes at least one annular inclined surface 2132. When the first connecting surface structure 213 includes only one annular inclined surface 2132, the inner side of the annular inclined surface 2132 is connected to the top surface 212 of the column, and the outer side is connected to the peripheral side surface 2111 of the column. When the first connecting surface structure 213 includes multiple annular inclined surfaces 2132, the multiple annular inclined surfaces 2132 are arranged sequentially from the inner side to the outer side and the slope gradually increases. Through the annular inclined surface 2132, the structure and effect of the annular connection between the side wall 1011 and the top 1012 of the protrusion 101 can also be achieved.

[0037] In some specific embodiments, the diameter D1 of the stamping column 21 is 5.77mm~15mm, the radius R1 of the arc surface in the first annular arc surface 2131 is 0.8mm~5.5mm, the inner diameter D2 of the stamping hole 11 is 6.35mm~15mm, and the radius R2 of the arc surface in the second annular arc surface 1131 is 0.25mm~5.5mm.

[0038] In the production process of easy-open lids, multiple foaming processes are required, and each foaming process uses foaming molds with corresponding specifications. The foaming mold in this embodiment has a structure suitable for use in multiple processes, demonstrating broad applicability.

[0039] In some specific embodiments, the diameter D1 of the stamping column 21 is 10.8mm~15mm, the radius R1 of the arc surface in the first annular arc surface 2131 is 2.6mm~5.5mm, the inner diameter D2 of the stamping hole 11 is 11mm~15mm, and the radius R2 of the arc surface in the second annular arc surface 1131 is 2.9mm~5.5mm.

[0040] The production process of easy-open lids generally includes two foaming processes. After the two foaming processes, a protrusion 101 of a specified size is formed on the basic lid 10. However, the upper mold core 1 used in these two foaming processes has a small stamping hole 11, and the stamping column 21 of the lower mold core 2 also has a small diameter, making it impossible or difficult to set an annular arc surface.

[0041] In the embodiment, the diameter D1 of the punch column 21 is 10.8mm~15mm, and the inner diameter D2 of the punch hole 11 is 11mm~15mm, so that there is enough space for the first annular arc surface 2131 and the second annular arc surface 1131 of corresponding size to be arranged on the punch column 21 and in the punch hole 11 respectively, to form the third annular arc surface 1013 between the side wall 1011 and the top 1012 of the protruding part 101 after the punch foaming, so as to achieve the effect of smooth connection.

[0042] In some specific embodiments, the diameter D1 of the punch column 21 is 5.9mm~11mm, the radius R1 of the arc in the first annular arc surface 2131 is 1.5mm~3.1mm, the inner diameter D2 of the punch hole 11 is 6.5mm~11mm, and the radius R2 of the arc in the second annular arc surface 1131 is 0.7mm~0.8mm.

[0043] Since a larger punch column 21 and punch hole 11 are needed in the first punch foaming process, at least three foaming processes are required through experiments and actual use. The foaming draw die in the embodiment is proved to have a good effect of protecting the tin layer when used as a foaming draw die in the second foaming process through experiments and actual use.

[0044] In some specific embodiments, the diameter D1 of the punch column 21 is 5.82mm~5.85mm, the radius R1 of the arc in the first annular arc surface 2131 is 0.8mm~1.2mm, the inner diameter D2 of the punch hole 11 is 6.52mm~6.55mm, and the radius R2 of the arc in the second annular arc surface 1131 is 0.5mm~0.7mm.

[0045] The foaming draw die in the embodiment is proved to have a good effect of protecting the tin layer when used as a foaming draw die in the third foaming process through experiments and actual use.

[0046] In some specific embodiments, the diameter D1 of the punch column 21 is 5.77mm~5.8mm, the radius R1 of the arc in the first annular arc surface 2131 is 0.8mm~1.6mm, the inner diameter D2 of the punch hole 11 is 6.35mm, and the radius R2 of the arc in the second annular arc surface 1131 is 0.25mm~0.4mm.

[0047] The foaming draw die in the embodiment can be used as a foaming draw die in the fourth foaming process. The radius R1 of the arc of the first annular arc surface 2131 of the foaming draw die in the embodiment is slightly larger than that of the foaming draw die used in the third foaming process, which can make the edge of the top 1012 of the protruding part 101 more flat, which is beneficial to the subsequent rivet operation.

[0048] The embodiment also discloses a punch equipment, which refers to Figure 9, including the above blister draw mold.

[0049] In some embodiments, referring to Figure 9 , the stamping device comprises at least three blister draw molds, which are respectively referred to as the first draw mold 20, the second draw mold 30 and the third draw mold 40, and the first draw mold 20, the second draw mold 30 and the third draw mold 40 are arranged in sequence; in the first draw mold 20, the diameter D1 of the stamping column 21 is 10.8mm~15mm, the radius R1 of the arc in the first annular arc surface 2131 is 2.6mm~5.5mm, the inner diameter D2 of the stamping hole 11 is 11mm~15mm, and the radius R2 of the arc in the second annular arc surface 1131 is 2.9mm~5.5mm; in the second draw mold 30, the diameter D1 of the stamping column 21 is 5.9mm~11mm, the radius R1 of the arc in the first annular arc surface 2131 is 1.5mm~3.1mm, the inner diameter D2 of the stamping hole 11 is 6.5mm~11mm, and the radius R2 of the arc in the second annular arc surface 1131 is 0.7mm~0.8mm; in the third draw mold 40, the diameter D1 of the stamping column 21 is 5.82mm~5.85mm, the radius R1 of the arc in the first annular arc surface 2131 is 0.8mm~1.2mm, the inner diameter D2 of the stamping hole 11 is 6.52mm~6.55mm, and the radius R2 of the arc in the second annular arc surface 1131 is 0.5mm~0.7mm.

[0050] In this embodiment, the stamping device performs at least three blistering processes, gradually increases the length of the protruding part 101 and reduces the diameter of the protruding part 101, so that the protruding part 101 finally meets the processing requirements.

[0051] Specifically, in the first draw mold 20, the hole depth H1 of the stamping hole 11 is 3.2mm~3.5mm; in the second draw mold 30, the hole depth H1 of the stamping hole 11 is 4.5mm; in the third draw mold 40, the hole depth H1 of the stamping hole 11 is 4.5mm.

[0052] After the complete stamping and blistering work of the stamping device in this embodiment, the probability of damage to the tin layer in each blistering process can be reduced, especially after multiple blistering processes, and this effect is more obvious, which is beneficial to improve the forming quality of the protruding part 101 and the quality of the easy-open cover.

[0053] In some embodiments, referring to Figure 9 , the stamping device further comprises a fourth draw mold 50, and in the fourth draw mold 50, the diameter D1 of the stamping column 21 is 5.77mm~5.8mm, the radius R1 of the arc in the first annular arc surface 2131 is 0.8mm~1.6mm, the inner diameter D2 of the stamping hole 11 is 6.35mm, and the radius R2 of the arc in the second annular arc surface 1131 is 0.25mm~0.4mm.

[0054] In the fourth draw die 50, in addition to further reducing the diameter of the protrusion 101, the top 1012 of the protrusion 101 can be made more flat, which is beneficial for subsequent rivet punching operations.

[0055] Specifically, in the fourth draw die 50, the hole depth H1 of the punched hole 11 is 4 mm.

[0056] In the present embodiment, the base cover 10 is sequentially conveyed to the first draw die 20, the second draw die 30, the third draw die 40 and the fourth draw die 50 by a conveying device to perform four bubbling processes.

[0057] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like within the inventive concept of the present application, as described in the present application, and the contents of the drawings, are included in the patent protection scope of the present application.

Claims

1. A blister mold characterized by: It comprises an upper mold core (1) and a lower mold core (2), the lower mold core (2) comprises a punching column (21), the upper mold core (1) is provided with a punching hole (11) corresponding to the punching column (21); The punching column (21) is provided with a column side (211) and a column top surface (212), and a first connecting surface structure (213) is arranged between the column side (211) and the column top surface (212); the punching hole (11) comprises a hole side (111) and a hole top surface (112), and a second connecting surface structure (113) corresponding to the first connecting surface structure (213) is arranged between the hole side (111) and the hole top surface (112), so that after the convex part (101) is punched on the basic cover (10) by using the foaming die, the side wall (1011) of the convex part (101) is smoothly connected with the top (1012).

2. The blister form of claim 1, wherein: The punching column (21) is in a cylindrical shape, the column side (211) comprises a column peripheral side (2111), and the first connecting surface structure (213) comprises a first annular arc surface (2131) extending around the outer peripheral side of the column top surface (212), and the lower end of the first annular arc surface (2131) is connected with the upper end of the column peripheral side (2111). The punching hole (11) is a circular hole, the hole side (111) comprises a hole peripheral side (1111), and the second connecting surface structure (113) comprises a second annular arc surface (1131) extending around the outer peripheral side of the hole top surface (112), and the lower end of the second annular arc surface (1131) is connected with the upper end of the hole peripheral side (1111).

3. The blister form of claim 2, wherein: The diameter D1 of the punching column (21) is 5.77mm~15mm, the radius R1 of the arc in the first annular arc surface (2131) is 0.8mm~5.5mm, the inner diameter D2 of the punching hole (11) is 6.35mm~15mm, and the radius R2 of the arc in the second annular arc surface (1131) is 0.25mm~5.5mm.

4. The blister form of claim 3, wherein: The diameter D1 of the punching column (21) is 10.8mm~15mm, the radius R1 of the arc in the first annular arc surface (2131) is 2.6mm~5.5mm, the inner diameter D2 of the punching hole (11) is 11mm~15mm, and the radius R2 of the arc in the second annular arc surface (1131) is 2.9mm~5.5mm.

5. The blister form of claim 3 wherein: The diameter D1 of the punching column (21) is 5.9mm~11mm, the radius R1 of the arc in the first annular arc surface (2131) is 1.5mm~3.1mm, the inner diameter D2 of the punching hole (11) is 6.5mm~11mm, and the radius R2 of the arc in the second annular arc surface (1131) is 0.7mm~0.8mm.

6. The blister form of claim 3 wherein: The diameter D1 of the stamping column (21) is 5.82-5.85 mm, the radius R1 of the arc in the first annular arc surface (2131) is 0.8-1.2 mm, the inner diameter D2 of the stamping hole (11) is 6.52-6.55 mm, and the radius R2 of the arc in the second annular arc surface (1131) is 0.5-0.7 mm.

7. The blister form of claim 3 wherein: The diameter D1 of the stamping column (21) is 5.77-5.8 mm, the radius R1 of the arc in the first annular arc surface (2131) is 0.8-1.6 mm, the inner diameter D2 of the stamping hole (11) is 6.35 mm, and the radius R2 of the arc in the second annular arc surface (1131) is 0.25-0.4 mm.

8. A stamping apparatus characterized by: The foaming draw of any one of claims 1-7.

9. The stamping apparatus of claim 8, wherein: The foaming draw of any one of claims 1-7. The foaming draw of any one of claims 1-7. The foaming draw of any one of claims 1-7. The foaming draw of any one of claims 1-7. The foaming draw of any one of claims 1-7. In the third draw die (40), the diameter D1 of the stamping column (21) is 5.82mm-5.85mm, the radius R1 of the arc in the first annular arc surface (2131) is 0.8mm-1.2mm, the inner diameter D2 of the stamping hole (11) is 6.52mm-6.55mm, and the radius R2 of the arc in the second annular arc surface (1131) is 0.5mm-0.7mm.

10. The stamping apparatus of claim 9, wherein: The fourth draw die (50) is also included, in which the diameter D1 of the stamping column (21) is 5.77mm-5.8mm, the radius R1 of the arc in the first annular arc surface (2131) is 0.8mm-1.6mm, the inner diameter D2 of the stamping hole (11) is 6.35mm, and the radius R2 of the arc in the second annular arc surface (1131) is 0.25mm-0.4mm.

Images