KR100405263B1 - Lug cap and method thereof - Google Patents

Abstract

The present invention provides a blank and draw process for forming a cap shape by cutting and pressing a metal disc; An anti-corrosion coating process for spraying an anti-corrosion coating solution on the end portion of the cap formed in the above process; A coating liquid drying process of placing the cap sprayed with the anti-corrosion coating liquid into a drying unit and drying the cap; A frical molding process of bending the end of the skirt of the cap, which has undergone the coating solution drying process; A curl molding process of curling the bent end of the cap inwardly to form curls; A lug forming process of protruding a plurality of lugs at equal intervals from the front end of the curl; A compound application process of applying a compound for maintaining airtightness on the lower inner circumferential surface of the cap; It provides a method for producing a rust-proof lug cap and a lug cap manufactured by the manufacturing method characterized in that it comprises a compound drying process for drying the compound-coated cap in a drying means.

Description

Rust prevention rug cap and manufacturing method {LUG CAP AND METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lug cap, and more particularly, to a lug cap capable of preventing rust inside a lug cap and a method of manufacturing the same.

Typically, the lug cap is a container lid for sealing a container in which a threaded or ring-shaped protrusion is formed on the outer circumferential surface of the container spout. The lug cap is mainly made of a steel sheet, a chromed steel sheet, a tin plated steel sheet. The lug cap is RTO (Regular Twist Off), RTB (Regular Twist Button), RTS (Regular Twist Step), FAO (Fluted And Open) There are various types according to external forms such as FAB (Fluted And Button) and SAB (Step And Button).

1 is an internal configuration and a rear view showing a lug cap according to an embodiment of the prior art, Figure 2 is a flow chart showing a method of manufacturing a lug cap according to an embodiment of the prior art.

As shown in FIG. 1, the lug cap 10 according to the exemplary embodiment of the prior art includes a loop 12, a skirt 14 formed by bending at an outer end of the loop 12, and an end of the skirt 14. It consists of a curl 16 curled inwardly and a plurality of lugs 18 protruding at predetermined intervals from the tip of the curl 16.

In particular, the lug 18 is a portion that serves to lock the lug cap, and forms about three to six pieces depending on the size of the lug cap. In addition, a button for identifying a vacuum packaging state may be added to the loop 12.

On the other hand, as shown in Figure 2, the lug cap according to the embodiment of the prior art, the blank and draw process (S100, Blank Draw) to form a cap shape by cutting and pressing the metal disc, the end of the formed cap Precurl forming process of slightly bending (S110, Precurl forming), curling process of forming a curl by curling the bent end of the cap inwards (S120, Curl forming), a plurality of lugs at equal intervals at the tip of the curl Lug forming process to protrude (S130, Lug forming), compound coating process (S140, Compound coating) for applying a compound for maintaining airtightness on the inner surface of the cap and compound drying to bake and dry the compound coated cap to the oven It is manufactured through the process (S150, Compound dry).

However, the lug cap according to the embodiment of the prior art has a problem that rust is rusted inside the lug cap due to the moisture remaining after the container cooling, causing a discomfort to the user who opened the lug cap. In addition, the lug cap is mainly used in a vacuum-packed container. Immediately after opening the lug cap, the vacuum inside the container is released, and rust generated on the inner surface of the lug cap by the pressure difference between the inside and the outside of the container is released. There was a problem flowing into.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a rust preventive lug cap and a method of manufacturing the same to prevent the rust from rusting inside the lug cap.

In order to achieve the object of the present invention as described above, the present invention provides a lug cap comprising: a loop; A skirt bent to one side at an outer circumferential end of the loop; A curl formed by rolling inward at the end of the skirt; A plurality of lugs formed spaced apart from each other at predetermined ends of the curl; It provides a rust-proof lug cap characterized in that it comprises an anti-corrosion coating layer formed on the surface of the curl and lug.

In addition, the present invention provides a method for producing a lug cap, comprising: a blank and draw process of forming a cap shape by cutting and pressing a metal disc; An anti-corrosion coating process for spraying an anti-corrosion coating solution on the end portion of the cap formed in the above process; A coating liquid drying process of placing the cap sprayed with the anti-corrosion coating liquid into a drying unit and drying the cap; A frical molding process of bending the end of the skirt of the cap, which has undergone the coating solution drying process; A curl molding process of curling the bent end of the cap inwardly to form curls; A lug forming process of protruding a plurality of lugs at equal intervals from the front end of the curl; A compound application process of applying a compound for maintaining airtightness on the lower inner circumferential surface of the cap; It provides a method for producing a rust-proof lug cap, characterized in that it comprises a compound drying process for drying the compound coated cap in a drying means.

1 is an internal configuration and a rear view showing a general lug cap,

2 is a flowchart illustrating a method of manufacturing a lug cap according to an embodiment of the prior art;

3 is a cross-sectional view showing the anti-rust lug cap according to a preferred embodiment of the present invention,

4 is a flow chart showing a method of manufacturing a rust preventive lug cap according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

110: loop 120: skirt

130: curl 140: rug

150: liner 160: anti-corrosion coating layer

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

3 is a cross-sectional view showing a rust preventing lug cap according to a preferred embodiment of the present invention, Figure 4 is a flow chart showing a method of manufacturing a rust preventing lug cap according to a preferred embodiment of the present invention.

As illustrated in FIG. 3, the anti-rust lug cap 100 according to the preferred embodiment of the present invention includes a loop 110, a skirt 120, a curl 130, a lug 140, a liner 150, and anti-corrosion. The coating layer 160 is included.

The loop 110 is a portion that forms the top of the lug cap. The loop 110 may further include a button for identifying a vacuum packaging state.

The skirt 120 is a portion formed by bending to one side from the outer circumferential end of the loop. The skirt 120 forms a side of the lug cap and may have a flute to facilitate rotation of the lug cap.

The curl 130 is a portion formed by rolling inward from the end of the skirt. The curl 130 is formed over the entire end of the skirt.

The lugs 140 are a plurality of protrusions formed spaced apart at predetermined intervals from the tip of the curl. The lug 140 is coupled to the screw groove portion of the container to the locking function of the lug cap, and forms about three to six depending on the size of the lug cap.

The liner 150 is a compound layer coated on the inner bottom surface of the cap where the loop and the skirt meet. The liner 150 seals between the lug cap and the container so that the inside of the container can be kept vacuum.

The anti-corrosion coating layer 160 is a coating layer formed on the surface of the curl and lug. The anti-corrosion coating layer 160 prevents rust from occurring on the inner surface of the lug cap due to moisture in the container. The anti-corrosion coating layer 160 may be formed by buff coating. In addition, the anti-corrosion coating layer 160 may be formed on the entire inner surface of the skirt of the lug cap in addition to the curl and lug surfaces.

Meanwhile, as shown in FIG. 4, the method for manufacturing the anti-rust lug cap according to the preferred embodiment of the present invention includes a blank and draw process (S200), an anti-corrosion coating process (S210), a coating liquid drying process (S220), and a pre-curl Forming process (S230), curl forming process (S240), lug forming process (S250), compound application process (S260) and compound drying process (S270).

The blank and draw process (S200) is a process of forming a cap shape by cutting and pressing a metal disc. The metal disc is used as a chrome treated steel sheet, a tin plated steel sheet, or the like.

The anti-corrosion coating process (S210) is a process of spraying the anti-corrosion coating solution to the end portion of the cap formed in the blank and draw process (S210). As the anti-corrosion coating solution, a buff solution is preferable. The anti-corrosion coating process (S210) is made by spraying the anti-corrosion coating liquid from the spray nozzle while rotating the lug cap.

The coating solution drying step (S220) is a process of drying the lug cap sprayed with the anti-corrosion coating solution into a drying means. As the drying means, an oven or the like is preferable, and the drying temperature is preferably about 110 to 120 ° C.

The frical forming process (S230) is a process of bending the skirt end of the lug cap after the coating solution drying process. The pre-curling process (S230) is a preliminary processing for curl and lug forming. The frical molding process S230 may also be referred to as a hemming process.

The curl molding process (S240) is a process of forming a curl by rolling the bent end of the lug cap inwardly. The curl molding process (S240) is a process of forming a curl by further rolling the bent portion formed at the end of the skirt in the pre-curling process (S230).

The lug forming process (S250) is a process of protruding a plurality of lugs at equal intervals at the tip of the curl. The number of lugs can be adjusted according to the size of the lug cap.

The compound application process (S260) is a process of applying a compound for maintaining airtightness on the lower inner peripheral surface of the cap. The compound application process (S260) is made by using a spin lining process to apply the compound injected from the nozzle to the inner peripheral surface of the lower cap while rotating the cap. Polyethylene, polypropylene, or the like may be used as the compound.

The compound drying process (S270) is a process of drying the compound applied to the cap by putting the compound-coated cap in a drying means such as an oven and heating to a predetermined temperature.

As described above, the anti-rust lug cap and the manufacturing method thereof according to the embodiment of the present invention do not cause discomfort to the user by preventing the rust of the rust due to contact with the solution such as moisture and the inner surface of the lug cap, and does not cause sanitary lug caps. It is effective to provide.

Claims (5)

In the lug cap, Loops; A skirt bent to one side at an outer circumferential end of the loop; A curl formed by rolling inward at the end of the skirt; A plurality of lugs formed spaced apart from each other at predetermined ends of the curl; Anti-rust lug cap, characterized in that it comprises an anti-corrosion coating layer formed on the surface of the curl and lug. The method of claim 1, The anti-corrosion coating layer is a rust-proof lug cap, characterized in that the buff coating layer. The method of claim 1, The lug cap is a rust preventive lug cap further comprises a liner that is a compound layer applied to the portion where the loop and skirt meet. In the lug cap manufacturing method, A blank and draw process of forming a cap shape by cutting and pressing a metal disc; An anti-corrosion coating process for spraying an anti-corrosion coating solution on the end portion of the cap formed in the above process; A coating liquid drying process of placing the cap sprayed with the anti-corrosion coating liquid into a drying unit and drying the cap; A frical molding process of bending the end of the skirt of the cap, which has undergone the coating solution drying process; A curl molding process of curling the bent end of the cap inwardly to form curls; A lug forming process of protruding a plurality of lugs at equal intervals from the front end of the curl; A compound application process of applying a compound for maintaining airtightness on the lower inner circumferential surface of the cap; And a compound drying process for drying the compound-coated cap in a drying means. The method of claim 4, wherein The anti-corrosion coating solution as a rust solution, characterized in that the manufacturing method of the anti-rust lug cap.