WO2016026308A1

WO2016026308A1 - Bottle cap, manufacturing method therefor, stamping die for manufacturing bottle cap, and bottle

Info

Publication number: WO2016026308A1
Application number: PCT/CN2015/076297
Authority: WO
Inventors: 冯林
Original assignee: 冯林
Priority date: 2014-08-19
Filing date: 2015-04-10
Publication date: 2016-02-25
Also published as: CN105691860A; CN104192411B; CN105691861A; CN104192411A; CN105689543A

Abstract

A bottle cap, comprising an iron sheet cap shell, the iron sheet cap shell comprising a disc-shaped cap portion (10) and a skirt portion (11) provided with protruding folds (111) and sunken teeth (112). An iron ring (12) is provided at any position of a bottom end of the skirt portion (11), and the iron ring (12), the cap portion (10) and the skirt portion (11) are made by processing a same iron sheet. Also disclosed are a manufacturing method for the bottle cap, a stamping die for manufacturing the bottle cap and a bottle comprising the bottle cap. In the present invention, iron rings are manufactured using surplus iron sheet pieces produced when a whole tinplate sheet is cut into a plurality of circular iron sheet pieces, solving the technical problems that existing bottle caps are difficult to open and production costs and raw material costs are high.

Description

Cap and its manufacturing method, stamping die and bottle for manufacturing cap

Technical field

The invention belongs to the technical field of container seals, and in particular relates to a bottle cap and a manufacturing method thereof, a stamping die for manufacturing a bottle cap and a bottle.

Background technique

In the existing market, most alcoholic beverages, carbonated beverages, canned foods, etc. are all in glass bottles. However, since glass bottles are difficult to mold relatively fine threads like plastic bottles, glass bottles are generally made of iron. Or steel material to make the cap, because the iron or steel material has good hardness, and after it is processed into a certain shape, it is easy to be wrapped with the bottle body. However, since the iron or steel cap has good hardness and is tightly packed with the bottle, special tools are required to open it.

Usually, people buy alcoholic beverages, carbonated beverages or canned foods, such as beer; but they can't get the tools to open beer in time. In this case, the beer cap is often opened by the teeth, which not only damages the teeth, but also excessive shaking of the beer bottle causes the pressure inside the beer bottle to increase during the opening of the cap, which may cause the beer bottle to burst, thereby Inflicts damage on the user. Or use a tool such as a chopstick or a table corner to open the beer cap, but this method requires a lot of power and is not suitable for all people. Therefore, in general, the use of a dedicated bottle opener to open the beer cap is the safer and most versatile way. However, the bottle opener is a specialized tool that people don't carry often, and they can't get it anytime, anywhere, which brings great inconvenience to people who drink alcohol.

Based on the above problems, people began to study the method of opening the bottle cap very easily without the aid of the bottle opener. After the actual investigation and the literature search, the applicant found that there are two main ways to open the bottle:

The first one is similar to the way the can open the cap. The tear line is drawn on the cap. When you need to drink, you can hold the tab of the tear line and then force the cap along the tear line. Tear open and open the cap in this way. However, the cap is made of iron material, unlike the pull tab of the can, which is made of aluminum material. Therefore, if the cap is torn open, it needs more strength than pulling the can. However, existing cans are difficult to open for some vulnerable groups, not to mention the tearing of the iron cap. Also, the depth of the tear line on the cap is relatively difficult to process, and if the processing is shallow, the cap is difficult to tear open; if the processing is deep, 譬 Such as: beer bottle cap, because the pressure inside the beer bottle increases with the shaking of the beer bottle, it may cause the cap to be washed away by the air pressure inside the bottle. Further, since the cap is made of an iron material, the cap may not be completely removed from the bottle mouth even after being torn, and scratching may be caused in order to completely remove the cap having a sharp tearing opening.

The second method is to fix a pull ring by rivet and welding on the edge of the existing bottle cap, and pull the whole bottle cap by pulling the pull ring. However, since the cap is ferrous and the cap is only pulled by the pull ring, the force required to pull the cap is very large. Therefore, this method still has the problem of inconvenient use, and because the rivet and the solder joint are not strong, the cap may not be opened, and finally the bottle opener is used.

In order to solve the problems of the above two opening methods, the applicant invented a beer bottle cap (Chinese utility model patent, patent number: ZL201120386981.X) on October 12, 2011, the beer cap includes a metal cover And a sealing rubber pad disposed on the top of the inner cover of the metal cover, the metal cover cover comprising a disc-shaped cover portion and a pleated skirt, the pleats being located at an upper end of the skirt, and the lower end of the pleat is further provided A perforation, a plurality of perforations are arranged around the skirt, the spokes between the perforations are connected to an annular iron ring, and the annular iron ring is located at the bottom end of the skirt.

However, the applicant believes that the bottle cap solves the problem of inconvenience of opening in the above two opening modes, but there is a problem that the cost of raw materials is large and the cost is increased. Because the bottle cap is a one-time use product, and the amount of use is very large, if the cost of each cap increases by one cent, it will increase the production cost for the manufacturer, so how to maximize On the basis of ensuring the constant cost of manufacturing and raw materials, solving the problem that the existing bottle cap is difficult to open is a technical problem to be solved urgently.

Summary of the invention

The main object of the present invention is to provide a bottle cap and a manufacturing method thereof, a stamping die and a bottle for manufacturing the bottle cap, and to solve the technical problem that the cap is difficult to open, and the manufacturing cost and the raw material cost are high.

In order to achieve the above object, the present invention provides a bottle cap comprising a metal cover case, the iron cover case comprising a disc-shaped cover portion, and a skirt having convex pleats and recessed mouthpieces, An iron ring is disposed at any position of the bottom end of the skirt, and the iron ring, the cover portion and the skirt are machined from the same piece of iron.

Preferably, the iron ring is enclosed by a first iron strip, a second iron strip, a third iron strip and the skirt a top end of the first iron strip and a top end of the second iron strip are connected to the skirt portion, and a bottom end of the first iron strip and a bottom end of the second iron strip are both The third iron bar is connected; the outer side of the joint of the first iron bar and the second iron bar and the skirt is respectively located on a center line of the convex fold.

Preferably, the third iron bar is arched outward, and the first iron bar and the second iron bar are twisted.

Preferably, a width of a joint of the first iron strip, the second iron strip and the skirt is less than or equal to a sum of a width of a half of the raised pleats and a recessed mouth; An iron strip, the second iron strip and the outer side of the joint of the skirt are separated from each other by a distance of 2 to 6 of the raised pleats; the width of the third iron strip is 0.2 ～ 0.5cm.

Preferably, the iron ring further comprises a central perforation, and the distance between the top edge and the bottom edge of the central perforation is 0.2 cm to 1.9 cm.

In addition, in order to achieve the above object, the present invention also provides a method of manufacturing a bottle cap, the manufacturing method comprising the following steps:

Drawing a plurality of circular iron sheets on a square iron sheet, each of said circular iron sheets being tangent to edges of four adjacent said circular iron sheets such that a four corners are formed between each of said four circular iron sheets Star iron

Forming a perforation in the center of the square star;

Stamping the circular iron sheet connected to the square star sheet into a first iron sheet having the lid portion and the skirt portion;

The first iron sheath is stamped on the bottle such that the skirt forms a plurality of the raised pleats and the recessed mouth, and the square star is stamped into the iron ring.

Preferably, the step of processing a perforation in the center of the four-pointed star iron further comprises:

The four-pointed star iron is cut into an arc shape away from the two corners of the circular iron sheet.

Preferably, after the step of stamping the circular iron sheet connected to the square iron sheet into the first iron sheet having the cover portion and the skirt portion, the method further comprises:

An arcuate projection of a stamping die for stamping the circular iron is mated with the top of the perforation, the circular iron being joined to the four-corner tin.

Further, in order to achieve the above object, the present invention also provides a stamping die for manufacturing a cap, the stamping die comprising a first core and a second core, the first core being used for punching out a cover And a first core of the skirt, the second core for punching out the raised pleats and the recessed mouth of the skirt; the first core comprising an upper core and having an opposite shape to the upper core The lower core of the cavity, the bottom of the upper core is a small cylinder, the middle part is a truncated cone body, the top is a large cylinder; the second core is a steel cylinder, the cylinder The body side inner wall includes a plurality of first protrusions that cooperate with the recessed teeth and a plurality of first recesses that cooperate with the raised pleats, and the bottom end of the cylindrical body is provided with an arc-shaped convex block. a bottom edge of the curved bump is flush with a bottom edge of the cylindrical body, the curved bump has a thickness of half of a thickness of the cylindrical body, and a bottom of the curved bump and the through hole The top of the match.

In addition, in order to achieve the above object, the present invention also provides a bottle comprising a bottle body, characterized in that it further comprises a bottle cap, the cap cover comprising a metal cap shell, the tin cap shell comprising a disc-shaped shape The cover portion and the skirt portion having the convex pleats and the concave mouth portions, an iron ring is disposed at any position of the bottom end of the skirt portion, and the iron ring, the cover portion and the skirt portion are processed from the same iron sheet.

The invention solves the technical problem that the existing bottle cap is difficult to open, and the manufacturing cost and the raw material cost are high, by using the iron ring made of the excess iron sheet which is produced when the whole tinplate is cut by a plurality of round iron sheets.

Instruction sheet

1 is a distribution diagram of a cap to be stamped on a whole iron plate in a conventional bottle cap manufacturing process;

2 is a distribution diagram of a cap to be stamped on a whole iron plate in the manufacturing process of the cap of the present invention;

Figure 3 is a plan view of the bottle cap of the present invention before being punched from the tinplate;

4 is a schematic perspective view of a first embodiment of a bottle cap according to the present invention;

5 is a schematic flow chart of Embodiment 2 of a method for manufacturing a bottle cap according to the present invention;

6 is a schematic flow chart of Embodiment 3 of a method for manufacturing a bottle cap according to the present invention;

7 is a schematic flow chart of Embodiment 4 of a method for manufacturing a bottle cap according to the present invention;

Figure 8 is a perspective view showing the structure of the bottle of the sixth embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1:

Before introducing the technical solution of the present invention, the manufacturing method of the bottle cap in the prior art is introduced. As shown in FIG. 1 , in the prior art, in order to make the number of caps manufactured by one tinplate 1 the largest, multiple The circular iron sheets 2 from which the caps are made are distributed on the tinplate 1 in a staggered parallel arrangement. However, after cutting a plurality of round iron pieces, there are many remaining scraps, and the remaining scraps have a utilization value, such as an iron ring 12, which is convenient for people to open the caps, and it is difficult to solve the existing caps. Open technical issues.

However, in order to manufacture the iron ring 12 which is difficult to open by using the excess trim, the arrangement of the circular iron 2 on the tinplate 1 has been redesigned as shown in FIG. Although the distribution of the plurality of round metal sheets 2 for making the caps on the tinplate is still staggered in parallel, there is a square star 3 between each of the four circular tins 2 compared to the prior arrangement. According to the arrangement of the circular iron sheet 2 of FIG. 2, a circular iron sheet 2 with a square star-shaped iron sheet 3 is cut, as shown in FIG. 3, wherein the square-corner iron sheet can be used for making the iron ring 12 The user can easily insert the cap into the iron ring 12 by using a straight tool such as a chopstick, a screwdriver, a key, etc., and lift the cap from the bottle mouth. Since the pull ring of the cap of the present invention is formed by using excess iron between the circular iron sheets 2, the raw material cost is very close compared to the existing cap manufacturing process; meanwhile, due to the manufacturing process Only the process of cutting the perforations is added, so the manufacturing cost is very close to the manufacturing cost of the existing cap manufacturing process. Therefore, in general, compared with the existing bottle cap manufacturing process, the technical effect of solving the technical problem that the cap is difficult to open is solved on the basis that the cost of manufacturing and raw materials is substantially unchanged. .

At the same time, compared with other technical solutions that solve the technical problem that the cap is difficult to open by rivets, welding, and tearing lines, the manufacturing cost and the raw material cost are significantly reduced, compared with a beer bottle previously invented by the applicant. For the cover (Chinese utility model patent, patent number: ZL201120386981.X), the raw material cost and manufacturing cost are also significantly reduced.

To achieve the above object, the present invention provides a bottle cap.

As shown in FIG. 4, FIG. 4 is a schematic perspective view of a first embodiment of a bottle cap according to the present invention;

In Embodiment 1, the present invention provides a bottle cap, the cap comprising a tin cover, The iron cover case includes a disc-shaped cover portion 10, and a skirt portion 11 having a convex pleat 111 and a recessed mouth 112, and a flange 12 is disposed at any position of the bottom end of the skirt portion 11, the hoop ring 12. The cover portion 10 and the skirt portion 11 are formed from the same piece of iron.

The iron ring 12, the lid portion 10 and the skirt portion 11 are made of the same iron sheet, that is, the iron ring 12, the lid portion 10 and the skirt portion 11 are on the same iron sheet, and are not connected by other means such as rivets or welding, thereby reducing the processing. The technical effect of reducing the manufacturing cost and reducing the cost of raw materials. At the same time, since the iron ring 12, the cover portion 10 and the skirt portion 11 are processed from the same iron sheet, the connection is more firm and firm, so that when the bottle cap is lifted from the bottle mouth by the iron ring 12, the joint breakage is less likely to occur. .

Further, the iron ring 12 is surrounded by a first iron strip 121, a second iron strip 122, a third iron strip 123 and the skirt portion 11; a top end of the first iron strip 121 and the first a top end of the second iron bar 122 is connected to the skirt portion 11, and a bottom end of the first iron bar 121 and a bottom end of the second iron bar 122 are connected to the third iron bar 123; the first iron The strip 121 and the outer side of the joint of the second iron strip 122 and the skirt portion 11 are respectively located on the center line of the convex pleats 111.

The two points farthest from the outer side of the joint of the first iron strip 121 and the second iron strip 122 and the skirt 11 are respectively located on the center line of the convex pleats 111, that is, the first iron strip 121 and the second iron strip 122 and the skirt The outer joint point of the 11 is located at the center point of the raised pleats 111. Because of the space between the raised pleats 111 and the mouth of the bottle, the design of the structure is more advantageous for the user to use the iron ring 12 to cover the beer bottle. Pick up from the mouth of the beer bottle.

Further, the third iron bar 123 is outwardly arched, and the first iron bar 121 and the second iron bar 122 are twisted.

As the third iron bar is arched outward, and the first iron bar and the second iron bar are twisted, on the one hand, the strength of the first iron bar and the second iron bar is enhanced, so that it is not easy to be broken, on the other hand, iron The ring arches outward, and the user uses the iron ring to open the cap, which makes the use more convenient.

Further, a width of a joint of the first iron strip 121, the second iron strip 122 and the skirt portion 11 is less than or equal to a width of a half of the convex pleats 111 and one of the concave teeth 112 And the first iron strip 121, the second iron strip 122 and the outer side of the joint of the skirt 11 are separated from each other by 2 to 6 of the raised pleats 111; The width of the third iron bar 123 is 0.2 to 0.5 cm.

The width of the junction of the first iron bar 121 and the skirt 11 and the width of the junction of the second iron bar 122 and the skirt 11 are both less than or equal to the width of the half convex pleat 111 and one concave tooth 112. By the structural design, when the beer bottle cap is stamped, the first iron strip 121 and the second iron strip 122 are twisted inward, thereby causing the third iron strip 123 to bulge outward. Since the first iron bar 121 and the second iron bar 122 are twisted inward, the strength of the first iron bar 121 and the second iron bar 122 is enhanced so as not to be easily broken. Since the third iron bar 123 is arched outward, after the punching is completed, the iron ring 12 does not fit with the bottle body 13, so that when the bottle cap is lifted from the bottle mouth by the iron ring 12, it is inconvenient for the user to use the chopsticks, A straight tool such as a screwdriver or a key is inserted into the iron ring 12.

The width of the third iron bar 123 is set to 0.2 to 0.5 cm. By the reasonable setting of the width of the third iron bar 123, the third iron bar 123 is not easily broken during the process of lifting the bottle cap from the bottle mouth by the iron ring 12. Technical effect.

Further, the iron ring 12 further includes a central through hole, and the distance between the top edge and the bottom edge of the center through hole is 0.2 cm to 1.9 cm.

The invention realizes the process of picking up the bottle cap from the bottle mouth by using the iron ring 12 in a reasonable setting of the distance between the top edge and the bottom edge of the center perforation, and facilitating the insertion of the straight tool such as a child, a screwdriver and a key into the center. Inside the perforation.

Example 2:

Further, in order to achieve the above object, the present invention also provides a method of manufacturing a bottle cap.

As shown in FIG. 5, FIG. 5 is a schematic flow chart of Embodiment 2 of a method for manufacturing a bottle cap according to the present invention.

In Embodiment 2, the method of manufacturing the bottle cap comprises the following steps:

Step S10, drawing a plurality of circular iron sheets 2 on a square iron, each of the circular iron sheets 2 being tangent to the edges of four adjacent circular tines 2, so that every four of the circles Forming a four-pointed star iron 3 between the iron sheets 2;

Step S11, processing a through hole in the center of the square star sheet 3;

Step S12, the circular iron sheet 2 connected to the four-pointed star metal 3 is punched into a first iron sheet having the cover portion 10 and the skirt portion 11;

Step S13, stamping the first metal sleeve on the bottle, so that the skirt 11 forms a plurality of the convex pleats 111 and the concave mouth 112, and punches the four-pointed star metal 3 into a The iron ring 12 is described.

According to the method for manufacturing a bottle cap provided by the present invention, since the iron ring 12 of the cap is formed by processing excess iron between the circular iron sheets 2, compared with the existing bottle, In terms of the lid manufacturing process, the raw material cost is very close; at the same time, since the manufacturing process only increases the process of cutting and perforating, the manufacturing cost is compared with the existing cap manufacturing process. Manufacturing costs are also very close. Therefore, in general, compared with the existing manufacturing method of the round cap, the technical problem of the bottle cap being difficult to open is solved on the basis of maximizing the cost of manufacturing and raw materials to a maximum extent. Technical effects.

Example 3:

As shown in FIG. 6, FIG. 6 is a schematic flow chart of Embodiment 3 of a method for manufacturing a bottle cap according to the present invention.

The method for manufacturing the bottle cap according to the third embodiment of the present invention, after the step S11, further includes:

In step S20, the four corners of the square iron sheet 3 are cut away from the two corners of the circular iron sheet 2 into an arc shape.

By cutting the four-pointed star-shaped iron 3 away from the two corners of the circular iron sheet 2 into an arc shape, on the one hand, the two sharp corners are prevented from scratching the user, and on the other hand, the appearance of the entire bottle cap is also more beautiful.

Example 4:

As shown in FIG. 7, FIG. 7 is a schematic flow chart of Embodiment 4 of a method for manufacturing a bottle cap according to the present invention.

The method for manufacturing a bottle cap according to the fourth embodiment of the present invention, based on the second embodiment, after step S12, further includes:

In step S30, an arcuate projection for punching the stamping die of the circular iron sheet 2 is engaged with the top of the perforation, and the circular iron sheet is joined to the four-corner tinplate 3.

By fitting the curved projections at the bottom end of the stamping die to the top of the perforations, it is convenient to punch out the skirt 11 having the raised pleats 111 and the recessed mouths 112 at the same time, and the iron ring 12 is punched out.

Example 5:

Further, in order to achieve the above object, the present invention also provides a stamping die for manufacturing a bottle cap; the stamping die includes a first core and a second core, the first core being used for punching out a cover 10 and a first iron sheet of the skirt 11, the second core for punching out the raised pleats 111 and the recessed teeth 112 of the skirt 11; the first core includes an upper core and the upper core The core has a lower core of an oppositely shaped cavity, the bottom of the upper core is a small cylinder, the middle part is a truncated cone body, and the top is a large cylinder; the second core is a steel cylinder The inner side wall of the cylindrical body includes a plurality of first protrusions and a plurality of the convex pleats that cooperate with the concave mouth 112 a first recess in which the wrinkle 111 is fitted, the bottom end of the cylindrical body is provided with an arcuate lug, and a bottom edge of the arcuate lug is flush with a bottom edge of the cylindrical body, the arc The bump thickness is half the thickness of the cylindrical body, and the bottom of the curved bump cooperates with the top of the perforation.

Since the bottom of the upper core of the first core is a small cylinder, the middle part is a round body, the top is a large cylinder, and the lower core and the upper core have opposite cavities, so it is convenient to be with a star-shaped iron 3 connected circular iron sheets 2 are once stamped into a first iron sheet having a cover portion 10 and a skirt portion 11; since the second core is a steel cylinder, the inner wall of the cylindrical body includes a plurality of recessed teeth 112 a matching first protrusion and a plurality of first recesses matching the protruding pleats 111, and a bottom end of the cylindrical body is provided with an arc-shaped convex block, so that it is convenient to punch out through the second core At the same time as the pleats 111 and the skirt portion 11 of the recessed mouth 112, the iron ring 12 is punched out, so that the manufacturing process of the bottle cap is more streamlined, thereby achieving the technical effect of reducing the manufacturing cost.

Example 6

Moreover, in order to achieve the above object, the present invention also provides a bottle,

Referring to FIG. 8, FIG. 8 is a schematic perspective view of a sixth embodiment of a bottle according to the present invention.

In the embodiment 6, the present invention further proposes a bottle comprising the above-mentioned bottle cap, wherein the structure of the bottle cap can be referred to the description of the above embodiment, and will not be described herein.

The bottle provided by the invention may further comprise a sealing rubber pad between the bottle cap and the bottle mouth, and the sealing performance of the bottle can be further ensured by the sealing rubber pad.

The embodiments of the invention have been described in detail above, but are merely exemplary, and the invention is not limited to the specific embodiments described above. All equivalent modifications and alterations to the invention are also within the scope of the invention, and the equivalents and modifications and improvements may be made without departing from the spirit and scope of the invention. And the like should be covered within the scope of the present invention.

Claims

A bottle cap comprising a tin cover, the tin cover comprising a disc-shaped cover, and a skirt having raised pleats and recessed teeth, characterized in that the bottom end of the skirt An iron ring is provided at any position, and the iron ring, the cover portion and the skirt are machined from the same piece of iron.
The bottle cap according to claim 1, wherein said iron ring is surrounded by a first iron bar, a second iron bar, a third iron bar and said skirt; said first iron bar a top end and a top end of the second iron strip are connected to the skirt portion, and a bottom end of the first iron strip and a bottom end of the second iron strip are connected to the third iron strip; the first The iron strip and the outer side of the joint of the second iron strip and the skirt are respectively located on a center line of the convex pleats.
The bottle cap according to claim 2, wherein said third iron bar is outwardly arched, and said first iron bar and said second iron bar are twisted.
The bottle cap according to claim 2, wherein a width of a joint of the first iron strip, the second iron strip and the skirt is less than or equal to a half of the raised folds and a The sum of the widths of the depressed mouths; the first iron bar, the second iron bar and the outer side of the joint of the skirt are farthest apart from the two points including 2 to 6 of the raised folds; The third iron strip has a width of 0.2 to 0.5 cm.
The bottle cap according to claim 1, wherein said iron ring further comprises a central perforation, and a distance between a top edge and a bottom edge of said central perforation is from 0.2 cm to 1.9 cm.
A method of manufacturing a bottle cap, characterized in that the method comprises the following steps:

Drawing a plurality of circular iron sheets on a square iron sheet, each of said circular iron sheets being tangent to edges of four adjacent said circular iron sheets such that a four corners are formed between each of said four circular iron sheets Star iron

Forming a perforation in the center of the square star;

Stamping the circular iron sheet connected to the square star sheet into a first iron sheet having the lid portion and the skirt portion;

The first iron sheath is stamped on the bottle such that the skirt forms a plurality of the raised pleats and the recessed mouth, and the square star is stamped into the iron ring.
The method of manufacturing a bottle cap according to claim 6, wherein the step of processing a perforation in the center of the four-pointed star iron further comprises:

The four-pointed star iron is cut into an arc shape away from the two corners of the circular iron sheet.
A method of manufacturing a bottle cap according to claim 6, wherein said container and said After the step of stamping the round iron piece of the four-pointed star-shaped iron joint into the first iron sheet having the cover portion and the skirt portion, the method further includes:

An arcuate projection of a stamping die for stamping the circular iron is mated with the top of the perforation, the circular iron being joined to the four-corner tin.
A stamping die for manufacturing a bottle cap, characterized in that the stamping die comprises a first core and a second core, the first core for punching a first iron having a cover and a skirt, a second core for stamping the raised pleats and recessed mouths of the skirt; the first core comprising an upper core and a lower core having a cavity of an opposite shape to the upper core, The bottom of the upper core is a small cylinder, the middle part is a truncated cone body, and the top part is a large cylinder; the second core is a steel cylinder body, and the inner side wall of the cylinder body includes a plurality of recesses a first protrusion matching the mouth and a plurality of first recesses matching the convex pleats, wherein the bottom end of the cylindrical body is provided with an arc-shaped protrusion, and a bottom edge of the curved protrusion is The bottom edge of the cylinder is flush, the thickness of the arcuate bump is half of the thickness of the cylinder, and the bottom of the arcuate bump cooperates with the top of the perforation.
A bottle comprising a bottle body, characterized in that it further comprises the bottle cap according to claims 1 to 5.