Zipper closure and method of manufacturing

Abstract

The application discloses a pop-top sealing structure and a production method thereof in the sealing field. The pop-top sealing structure comprises a sealing cover, the center part of the sealing cover is provided with an opening, and the bottom folding edge is bent at the opening in the center part of the sealing cover. The opening of the sealing cover is folded and treated, so that the thickness of the opening is ensured to be thicker, the arc-shaped sealing convex is smoothly transitioned, the sealing part is smoother, the problem of sharp burrs at the opening of the existing pop-top can is solved, the safety can be greatly improved, especially when the pop-top is used as animal packaging, the problem that animals directly use the objects in the can to cause scratches is avoided, the high-temperature-resistant elastic inclined table is arranged, the glue groove is formed on the sealing cover through stamping, the glue can be effectively prevented from being squeezed into the can from the sealing surface during the squeezing process, the high-temperature-resistant elastic inclined table can squeeze the glue from the outside into the glue groove during the pressing process, the glue is prevented from seeping from the periphery, and the safety is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sealing, in particular to a pull-ring sealing structure and a production method thereof. BACKGROUND

[0002] The pull-ring can is widely used in the canning industry, such as beverage, food, etc., but the existing pull-ring sealing structure has a relatively sharp opening when sealing, which has a great safety hazard when used, and when the sealing process is performed by using glue, the glue is pressed to both sides during the pressing process, which has a risk of entering the can or seeping outside. Therefore, the technical personnel in the field provides a pull-ring sealing structure and a production method thereof to solve the problems in the background art. SUMMARY

[0003] The present application relates to the field of sealing, in particular to a pull-ring sealing structure and a production method thereof.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A pull-ring sealing structure and a production method thereof, comprising a sealing cover, the sealing cover has an opening in the center, the sealing cover is bent at the opening in the center to form a bottom folding edge, the center of the sealing cover is an arc-shaped sealing protrusion, the arc-shaped sealing protrusion is smoothly transitioned, making the sealing more smooth; the periphery of the arc-shaped sealing protrusion is a glue sealing surface, the glue sealing surface is punched with a glue removal groove, the sealing cover is formed with a ring-shaped protrusion at the bottom of the glue removal groove, the glue sealing surface is connected with a soft sealing cover above the peripheral area of the glue removal groove, the soft sealing cover is integrally formed with a folded lifting piece at one end, and the sealing cover (1) is integrally formed with an inclined surface on one side of the glue sealing surface.

[0006] As a further scheme of the present application, an installation groove is provided at the periphery of the bottom end of the sealing cover.

[0007] As a further scheme of the present application, the soft sealing cover is made of aluminum foil, plastic film or waterproof paper, and the soft sealing cover is printed with usage instructions and precautions.

[0008] A production method of a pull-ring sealing structure, comprising the following steps:

[0009] S101, sealing cover preparation: according to the unfolded size of the sealing cover, the sealing cover is cut, then the structure of the unfolded bottom folding edge of the sealing cover is pressed by a pressing forming die, then the glue removal groove is punched and the ring-shaped protrusion is formed at the bottom of the glue removal groove, and the folding edge is folded by a folding machine to realize the manufacturing of the sealing cover.

[0010] S102, glue spraying: through the glue spraying equipment, the sealant is evenly brushed on the upper part of the glue sealing sealing surface of the sealing cover, and is located in the peripheral area of the glue discharging groove;

[0011] S103, sealing: after the soft sealing is placed on the upper part of the sealing cover, the heating and baking treatment is performed, and high pressure compression is performed.

[0012] As a further scheme of the present application: the thickness of the sealant brushed in step S102 is 0.08-0.09mm.

[0013] As a further scheme of the present application: the heating temperature in step S103 is 130℃-150℃, the baking time is 60s-90s, and the compression pressure is 0.3 Mpa-0.5 Mpa.

[0014] As a further scheme of the present application: the compression die used in the compression process in step S103 includes a compression die seat, a ball hinge support connected to the upper part of the compression die seat through a screw, a ball head movably connected in the ball hinge support, a compression clamping die handle fixedly connected to the top of the ball head, a compression die connected to the bottom end of the compression die seat through a screw, a compression protrusion integrally formed on the bottom end of the compression die, and a high-temperature-resistant elastic inclined table glued to the bottom end of the compression protrusion; the inclination angle of the high-temperature-resistant elastic inclined table is 1°-2°, and the distance between the bottom surface of the compression clamping die handle and the top surface of the ball hinge support is 1mm-2mm.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1、The present application can ensure that the thickness of the opening is thicker and has a smooth transition of the arc-shaped sealing protrusion, and the opening is smoother, which solves the problem of sharp burrs at the opening of the existing pull-tab can, greatly improves the safety, and avoids the problem of scratches caused by the direct use of the object in the can when used as animal packaging.

[0017] 2、The present application sets the high-temperature-resistant elastic inclined table and punches the glue discharging groove on the sealing cover, which can effectively prevent the glue from being squeezed into the can from the sealing surface during the extrusion process, and the high-temperature-resistant elastic inclined table can extrude the glue from the outside to the glue discharging groove during the compression process, avoiding the leakage from the periphery, which is safer. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of the present application;

[0019] Figure 2 is a structure diagram of the present application after removing the soft sealing;

[0020] Figure 3 is a bottom view of the present application;

[0021] Figure 4 is a sectional view of the closure cap in the present application;

[0022] Figure 5 is a structure diagram of the compression mold used in the compression process in the present application;

[0023] Figure 6 is a partial enlarged view of A in the present application Figure 5 .

[0024] In the figure: 1, closure cap; 2, slope surface; 3, installation groove; 4, soft seal; 5, pulling piece; 6, bottom folding edge; 7, arc-shaped sealing protrusion; 8, glue sealing surface; 9, glue removal groove; 10, compression clamping mold handle; 11, spherical hinge support; 12, spherical head; 13, compression mold base; 14, compression mold; 15, compression protrusion; 16, high-temperature-resistant elastic inclined table. DETAILED DESCRIPTION

[0025] Referring to Figures 1-4 , in the embodiment of the present application, an easy-to-pull seal structure and a production method thereof are provided, which comprise a closure cap 1, the center part of the closure cap 1 has an opening, the bottom folding edge 6 is folded at the opening in the center part of the closure cap 1, the center part of the closure cap 1 is an arc-shaped sealing protrusion 7, the arc-shaped sealing protrusion 7 is smoothly transitioned, so that the sealing part is more smooth, the periphery of the arc-shaped sealing protrusion 7 is a glue sealing surface 8, the glue removal groove 9 is stamped on the glue sealing surface 8, the annular protrusion is formed at the bottom of the glue removal groove 9 on the closure cap 1, the soft seal 4 is connected by gluing on the glue sealing surface 8 above the periphery area of the glue removal groove 9, the pulling piece 5 is integrally formed on one end of the soft seal 4 above, and the slope surface 2 is integrally formed on one side of the glue sealing surface 8 on the closure cap 1.

[0026] By adopting the above technical scheme, the thickness of the opening part can be ensured to be thicker by folding the edge of the opening part of the closure cap 1, and the arc-shaped sealing protrusion 7 is smoothly transitioned, so that the sealing part is more smooth, and the problem of sharp burrs at the opening part of the existing easy-to-pull can be solved, which can greatly improve the safety, especially when used as animal packaging, to avoid the problem of scratches caused by direct use of the real object in the can by animals.

[0027] Among them, the installation groove 3 is provided on the periphery of the bottom end of the closure cap 1, and the installation groove 3 is used for connecting with the packaging can.

[0028] Among them, the soft seal 4 is aluminum foil, plastic film or waterproof paper, and the soft seal 4 is printed with usage instructions and matters needing attention.

[0029] In the above technical scheme, the instructions and matters needing attention can be directly printed on the soft seal 4, which saves the trouble of pasting paper instructions and saves materials.

[0030] A production method of a pull-ring seal structure, comprising the following steps:

[0031] S101, seal cover 1 preparation: according to the unfolded size of the seal cover 1, after blanking, the structure of the unfolded bottom folding edge 6 of the seal cover 1 is pressed by a pressing forming die, then the glue removal groove 9 is punched and a ring-shaped protrusion is formed at the bottom of the glue removal groove 9, the folding edge is folded by a folding machine to realize the manufacture of the seal cover;

[0032] S102, glue spraying: the sealant is uniformly applied on the glue seal joint surface 8 above the seal cover 1 by a glue spraying device;

[0033] S103, sealing: the softened seal 4 after blanking is placed above the seal cover 1, and after heating and baking, high-pressure pressing is performed.

[0034] In step S102, the thickness of the sealant is 0.08-0.09mm, which can ensure more uniform application of the sealant.

[0035] In step S103, the heating temperature is 130-150℃, the baking time is 60-90s, and the pressing pressure is 0.3-0.5Mpa, which can make the glue connection more firm and reliable.

[0036] As shown in the figure, Figures 5-6 the pressing die 14 head used in the pressing process in step S103 includes a pressing die seat 13, a spherical hinge support 11 connected to the top of the pressing die seat 13 by screws, a ball head 12 movably connected inside the spherical hinge support 11, a pressing die clamping handle 10 fixedly connected to the top of the ball head 12, a pressing die 14 connected to the bottom end of the pressing die seat 13 by screws, a pressing protrusion 15 integrally formed on the bottom end of the pressing die 14, and a high-temperature-resistant elastic inclined table 16 glued to the bottom end of the pressing protrusion 15.

[0037] The inclination angle of the high-temperature-resistant elastic inclined table 16 is 1-2°, and the distance between the bottom surface of the pressing die clamping handle 10 and the top surface of the spherical hinge support 11 is 1-2mm.

[0038] By adopting the above technical scheme, by setting the high-temperature-resistant elastic inclined table 16 and punching the glue removal groove 9 on the seal cover 1, the glue can be effectively prevented from being squeezed from the joint surface into the tank during the squeezing process, and the high-temperature-resistant elastic inclined table 16 can squeeze the glue from the outside into the glue removal groove 9 during the pressing process, avoiding leakage from the periphery, which is safer. Moreover, by setting the ball head 12 and the spherical hinge support 11, and limiting the width between the spherical hinge support 11 and the pressing die clamping handle 10, the pressing force can be more uniform, and the pressing effect of the glue seal can be improved.

Claims

1. A zip-top closure structure comprising a closure cap (1), characterised in that: The center part of the sealing cover (1) has an opening, and the bottom folding edge (6) is folded at the opening in the center part of the sealing cover (1). The center part of the sealing cover (1) is an arc-shaped sealing protrusion (7), which is smoothly transitioned to make the sealing part more smooth. The outer periphery of the arc-shaped sealing protrusion (7) is a glue sealing surface (8), and the glue sealing surface (8) is stamped with a glue removal groove (9). The bottom of the glue removal groove (9) on the sealing cover (1) is formed with a ring-shaped protrusion. The glue sealing surface (8) is connected with a soft sealing cover (4) on the outer periphery of the glue removal groove (9). The soft sealing cover (4) is integrally formed with a folded lifting part (5) at one end. The sealing cover (1) is integrally formed with an inclined surface (2) on one side of the glue sealing surface (8).

2. A zip-top closure according to claim 1, wherein: An installation groove (3) is formed in the outer periphery of the bottom end of the sealing cover (1).

3. A zip-top closure according to claim 1, wherein: The soft sealing cover (4) is made of aluminum foil, plastic film or waterproof paper.

4. A method of producing a zip-top closure structure for use in a zip-top closure structure as claimed in any one of claims 1 to 3, characterised in that: The method comprises the following steps: S101, sealing cover (1) preparation: according to the unfolded size of the sealing cover (1), the material is cut, then the structure of the bottom folding edge (6) of the sealing cover (1) is pressed and formed after being unfolded, then the glue removal groove (9) is stamped and the ring-shaped protrusion is formed at the bottom of the glue removal groove (9), and the folding edge is folded by a folding machine to realize the manufacturing of the sealing cover; S102, glue spraying: the glue sealing surface (8) on the sealing cover (1) is uniformly coated with sealant by a glue spraying device; S103, sealing: the soft sealing cover (4) after cutting is placed on the sealing cover (1), and after heating and baking, high-pressure pressing is performed.

5. A method of producing a zip-tab closure according to claim 4, wherein: The thickness of the sealant in step S102 is 0.08-0.09mm.

6. A method of producing a zip-tab closure according to claim 4, wherein: The heating temperature in step S103 is 130-150℃, the baking time is 60-90s, and the pressing pressure is 0.3-0.5Mpa.

7. A method of producing a zip-tab closure according to claim 4, wherein: The pressing die (14) used in the pressing process in step S103 comprises a pressing die seat (13), a ball hinge support (11) connected to the top of the pressing die seat (13) through screws, a ball head (12) movably connected to the inside of the ball hinge support (11), a pressing die clamping handle (10) fixedly connected to the top of the ball head (12), a pressing die (14) connected to the bottom of the pressing die seat (13) through screws, a pressing protrusion (15) integrally formed on the bottom of the pressing die (14), and a high-temperature-resistant elastic inclined table (16) glued to the bottom of the pressing protrusion (15). The inclination angle of the high-temperature-resistant elastic inclined table (16) is 1-2°, and the distance between the bottom surface of the pressing die clamping handle (10) and the top surface of the ball hinge support (11) is 1-2mm.

Images