JP6332844B2 - Method for manufacturing container with cap - Google Patents

Description

The present invention relates to a process for the production of containers with sealed cap the container threaded by a cap having a screw cap or the like beverage is screwed.

As a cap to be attached to a threaded container made of steel, aluminum alloy or the like, a cap having a metal cap body and a liner provided on the inner surface of the top plate portion of the cap body is known. At the time of closing, the liner comes into contact with the top of the mouthpiece of the threaded container so that the inside can be sealed.
In addition, a container with a cap in which such a cap with a liner is attached to a threaded container uses a screw roller and a skirt roller while applying pressure by covering the cap part of the threaded container with a cap with a liner. It is manufactured by forming and winding the skirt of the cap body around the bulging portion of the base. The cap body has a closed cylindrical shape, and a bridge portion (perforation) is formed on the circumference of the skirt portion (skirt portion).
And opening of such a container with a cap is made | formed by raising the cap with a liner which rotates a cap with a liner along the lead angle of the screw | thread of a nozzle | cap | die part. At this time, a portion (pill fur proof portion) below the bridge portion in the skirt portion of the cap body wound around the bulging portion is cut, and the opening is clearly indicated.

  Further, in such a cap with a liner, conventionally, an in-shell mold that forms a liner with a predetermined shape by dropping a heated resin mass on the inner surface of the top surface of the cap body and embossing with a molding die. The type of metal cap was mainstream. However, since this cap with liner bonds the top surface of the cap body and the liner, the cap portion of the container and the liner rub against each other when opening, and the torque becomes very high, making it difficult to open the cap. It was a problem.

Therefore, as in Patent Literature 1, a hook portion (bending portion) that protrudes inward is provided on a side portion near the top surface portion (top plate portion) of the cap body, and a liner molded into a sheet shape is provided on the cap body. It is done to lock on. In this case, the liner is attached to the cap body by being disposed between the hook portion and the inner surface of the top surface portion without being bonded to the inner surface (top surface) of the top surface portion. Patent Document 1 describes that the liner is formed of a sliding layer made of a hard sheet such as polypropylene and a soft layer made of a resin such as an elastomer.
In such a cap with a liner, in the process of opening the container with the cap, at the beginning of the opening, the sealing layer of the liner is in intimate contact with the opening end of the cap portion of the container, and the sliding layer of the liner and the top of the cap body are in contact. The cap main body is opened by sliding with the inner surface of the surface portion, and it is possible to dramatically reduce the opening torque.

JP 2008-213039 A JP 2013-244996 A

However, in the cap with liner as described in Patent Document 1, the opening torque of the cap-equipped container is low even in the initial stage of opening the container, and the user may feel uncomfortable that the container is already opened. there were.
The opening torque includes a first torque when starting rotation at the time of opening and a second torque when the pilfer proof portion of the cap body is cut from the bridge portion, and these opening torques. It is not easy to control.

  In this regard, Patent Document 2 proposes a threaded container (a container with a cap) for the purpose of controlling the opening torque when the cap is opened. In the threaded container described in Patent Document 2, it is described that at least a part that is distorted inward is provided in the bulging portion of the cap portion to which the pilfer proof portion of the cap body is crimped. When the screwed cap with liner is rotated to start opening, the portion of the pilfer proof portion that is crimped to the distorted portion of the bulging portion is expanded in the radial direction, resulting in high resistance. It is described that the first torque can be increased by causing the first torque to increase.

  However, in the configuration in which a part of the bulging part is distorted in this way, the necessary resistance is obtained when the pill fur proof part that is in contact with the distorted part of the bulging part is not pressure-bonded to the distorted part. I can't. For this reason, there existed a malfunction that an effect was not exhibited depending on capping conditions.

The present invention has such has been made in view of the circumstances, while maintaining the cap removal torque when the container cap removal with relatively low, it is possible to increase the initial unplugging torque during cap removal caps It aims at providing the manufacturing method of an attached container.

The method of producing cap with container of the present invention, the ferrule portion externally threaded portion is formed in the container threaded container with cap fitted with a capped liner screwing state having a liner on the inner surface of the top portion of the cap body a method of manufacturing a, the mouthpiece, and a lip portion in contact with said liner, said external thread portion formed below the the mouth lip, formed bulges below the male screw portion of the cap body skirt of the cylindrical portion may be provided with protrusions projecting radially outwardly threaded end portion located at the lower end of the external thread portion of the mouth section of Ru and a bulging portion to be crimped, with the screw At the time of capping between the container and the cap with liner, the shape of the male screw part is transferred to the cylindrical part so as to follow the male screw part, and the female screw part is formed, and the shape of the convex part is followed to follow the convex part. To form a recess, Characterized in that to produce a container with serial cap.

By forming a convex portion at the screw end portion of the male screw portion, when the cap with the liner is capped along the male screw portion, the shape of the male screw portion and the convex portion is also transferred to the cap with the liner as the female screw portion and the concave portion. . And, when opening the cap, the concave portion transferred to the cap with liner serves as resistance when rotating over the convex portion provided on the base portion, so that the opening torque at the initial stage of opening the cap is increased. Can do. Further, by controlling the shape of the convex portion, fine adjustment of the opening torque can be easily performed.
On the other hand, since it is transferred to the cap with liner as a concave portion, after overcoming the convex portion of the cap portion, the concave portion of the cap with liner and the screw end portion of the female screw portion move higher than the convex portion of the cap portion. Therefore, there is no resistance in the subsequent opening process.
In addition, the threaded bottle can having a screw as described above can be opened and closed again by covering with a cap with a liner. Even when the cap with liner is screwed from above the cap after closing, the user feels a catch when the recess of the cap with liner is fitted to the convex portion of the cap at the final stage of closure. be able to. In this way, the user can be made aware of the closure, so that leakage of contents due to incomplete closure can be prevented.
Moreover, in the manufacturing method of the container with a cap of this invention, the said screw end part is made into the range to 90 degrees in the circumferential direction along this male screw part from the terminal end of the said male screw part.

In the method for manufacturing a container with a cap according to the present invention, the convex portion can be provided on either the thread or the thread valley of the male screw portion.
Even when a convex part is provided on the thread of the male screw part or when a convex part is provided on the screw valley, the same effect of improving the initial opening torque at the time of opening and recognizing the user's closure. Can be obtained. In addition, when providing a convex part in a screw valley, while making the protrusion height of the convex part the height below the protrusion height of a screw thread, it can make a convex part inconspicuous in appearance. When a user touches a convex part, it can be made hard to produce a sense of incongruity.

  ADVANTAGE OF THE INVENTION According to this invention, the opening torque at the time of opening can be raised, maintaining the opening torque at the time of container opening in a comparatively low state.

It is the principal part side view which fractured | ruptured the cap with a liner of the bottle can with a cap of embodiment of this invention. It is a side view which shows the bottle can with a screw | thread of embodiment of this invention. It is a schematic diagram for demonstrating an external thread part, and shows the cross section of a nozzle | cap | die part. It is principal part sectional drawing of the bottled can with a screw | thread explaining the processing method of the external thread part by a screw forming tool. It is the partially broken side view which shows the cap with a liner before winding up on the screwed bottle can of this embodiment. It is principal part sectional drawing of the bottle can with a cap explaining capping of the cap with a liner by a capping machine. It is principal part sectional drawing explaining opening of a bottle can with a cap. It is an opening torque chart of an Example and a prior art example.

Hereinafter, an embodiment of a method for manufacturing a container with caps according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the container with a cap manufactured by the manufacturing method of the present embodiment is, for example, a screwed bottle can 2 made of aluminum or aluminum alloy having a caliber of 38 mm (referred to in the present invention as a screwed container), and this Aluminum or a pilfer proof cap (hereinafter also referred to as a PP cap) that is screwed onto the cap portion 23 formed with the male screw portion 32 of the threaded bottle can 2 to seal the threaded bottle can 2 tightly. A bottle can 1 with a cap is formed of a cap 3 with a liner made of an aluminum alloy.

  As shown in FIG. 2, the threaded bottle can 2 is made of a thin metal plate of aluminum or an aluminum alloy, and a shoulder portion 21 that is gradually reduced in diameter upward is formed on a bottomed cylindrical body portion 20. A small-diameter neck portion 22 is formed at the upper end of the shoulder portion 21, and a base portion 23 is formed at the upper end of the neck portion 22. The base portion 23 is formed with a lip portion 31 in contact with the liner 5 of the cap 3 with liner, a male screw portion 32 formed below the lip portion 31, and a bulge formed below the male screw portion 32. 3, and a bulging portion 33 to which a skirt portion (pill fur proof portion) of the cylindrical portion 42 is crimped, and protrudes radially outward to a thread valley 36 of a screw end portion 32 e located at the lower end portion of the male screw portion 32. A convex portion 37 is provided.

  The screw end portion 32e will be described below. As shown in FIG. 3, the male screw portion 32 is incompletely increased in height until the height of the thread 35 reaches a predetermined dimension. There is a thread portion 35s. The incomplete thread portion 35s is a portion in which the height of the screw thread 35 is less than half of the reference height, and the height of the screw thread 35 is more than half of the reference height with respect to the incomplete screw portion 35s. The part to be made is a complete screw part. Then, the screw end portion 32e has a range θ from the end E to 90 ° in the circumferential direction along the male screw portion 32 including the incomplete screw portion 35s of the male screw portion 32. The end E of the male threaded portion 32 is the end of the incomplete threaded portion 35s and indicates a position where the displacement as the thread 35 is zero. In the present embodiment, the convex portion 37 is provided in the thread valley 36 at the boundary B between the incomplete thread portion 35s and the complete thread portion.

Moreover, the convex part 37 formed in the external thread part 32 is shape | molded simultaneously with the shaping | molding of the external thread part 32 with the thread formation tool 90, as shown in FIG.
The thread forming tool 90 has a core 90A and an outer core 90B. The core forming part 90A and the outer core 90B are formed with thread forming convex portions 91A for forming the male threaded portion 32 on the outer peripheral surface thereof. 91B and screw-forming recesses 92A and 92B are formed in a spiral shape and in a shape corresponding to each other. The screw forming convex portion 91A of the core 90A is formed in a right-handed thread shape (hereinafter referred to as right-handed convex portion 91A), and the screw forming convex portion 91B of the outer core 90B is formed in a left-handed screw shape ( Hereinafter, it is referred to as a left-handed convex portion 91B). Further, the core 90A is provided with a convex forming portion 95 for forming the convex portion 37 at a portion where the screw end portion 32e of the male screw portion 32 of the screw forming concave portion 92A is formed.

  Then, the core 90A and the outer core 90B come close to each other, sandwich the base portion 23 between the concave and convex portions, and rotate around its axis, whereby the male screw portion 32 and the convex portion 37 are formed on the base portion 23. It is formed. In addition, after screw-forming in this way, by curling the opening end portion of the mouthpiece portion 23 to form a lip portion 31 (curled portion) formed by rounding the opening end portion, The attached bottle can 2 is manufactured.

  On the other hand, the cap 3 with a liner that covers the bottled can 2 is attached to the screwed bottle can 2 by molding a sheet metal of aluminum or aluminum alloy into a cup shape. As shown in FIG. 5, a cap body 4 including a top surface portion 41 and a cylindrical portion 42 substantially suspended from the periphery of the top surface portion 41, and a liner 5 provided on the inner surface of the cap body 4, Have

  The liner 5 constituting the cap 3 with the liner is disposed on the inner surface side of the top surface portion 41 of the cap body 4, and comes into contact with the base portion 23 when the bottle can 2 is closed by the cap 3 with the liner. It is formed so that the inside can be sealed. The liner 5 is in contact with the sliding layer 51 that slides on the inner surface of the top surface portion 41 of the cap body 4 and the base portion 23 (lip portion 31) of the threaded bottle can 2 that is softer than the sliding layer 51. And a sealing layer 52 having a sealing function.

  Moreover, the board which forms the cap main body 4 uses the coating board which painted the inner and outer surfaces. In addition, for the top coat on the inner and outer surfaces, various lubricant added types are used as necessary. For example, a paint in which a lubricant is added to a resin such as epoxy phenol is baked on the inner surface of the top surface portion 41.

  Further, the cylindrical portion 42 of the cap body 4 has a cylindrical upper portion 44 and a cylindrical lower portion 45 that are vertically divided through slits 43 that are intermittently formed in the circumferential direction on the lower end surface thereof, and adjacent slits 43. The cylinder upper part 44 and the cylinder lower part 45 are connected by a plurality of bridges 43a formed therebetween.

As shown in FIG. 5, the cylindrical portion 42 of the cap body 4 includes a plurality of knurl recesses 11 arranged in the circumferential direction in the vicinity of the top surface portion 41 of the cylinder upper portion 44, and an opening 12 that releases internal pressure when the cap is opened. And a plurality of hook portions 13 for locking the liner 5 are formed.
The knurl recess 11 and the hook portion 13 have a concave shape on the outer peripheral surface of the cylindrical portion 42, and these are arranged at an interval to form an uneven surface on the outer peripheral surface of the cylindrical portion 42. The frictional resistance between the fingers holding the cap with liner 3 can be increased. Thereby, it becomes possible to hold | grip without sliding a hand and it can open easily.

Further, the hook portion 13 is formed by pushing a lower portion of the cut formed along the circumferential direction of the cylindrical portion 42 inward in the radial direction. As shown in FIG. (V-shaped) protruding. The opening 12 is formed by opening the cut.
Further, the upper end surface 15 of the hook portion 13 is formed at a position separated from the inner surface of the top surface portion 41 by at least the thickness of the sliding layer 51 constituting the liner 5. The liner 5 is attached to the cap body 4 by arranging the sliding layer 51 between the upper end surface 15 of the hook portion 13 and the inner surface of the top surface portion 41.
The opening 12 functions as a vent hole for releasing the gas inside the bottle can 2 to the outside when the cap 3 with liner is rotated while breaking the bridge 43a.

  Further, as described above, the liner 5 is disposed on the inner surface side of the top surface portion 41 of the cap body 4. The liner 5 is laminated with a sliding layer 51 that slides on the inner surface of the top surface portion 41 of the cap body 4, and is laminated on the sliding layer 51 directly or through an intermediate layer such as a barrier layer. It is a multilayer structure composed of a sealing layer 52 that is soft and comes into contact with the cap portion 23 of the bottle can 2 and has a sealing function.

The sliding layer 51 is formed in a disk shape from polypropylene or the like, and the outer diameter of the sliding layer 51 is determined according to the size of the cap body 4.
The sealing layer 52 is formed of an elastomer resin or the like that is softer than the sliding layer 51, and is coaxial with the sliding layer 51 so that it can contact at least the cap portion 23 of the screwed bottle can 2. It is formed in an annular shape or a disk shape having a smaller diameter than the sliding layer 51. In the liner 5 of the present embodiment, the sealing layer 52 is formed in a disc shape, and the outer peripheral portion that is in close contact with the cap portion 23 of the screwed bottle can 2 is formed thicker than the center portion.

Then, in order to manufacture the bottle can 1 with a cap by capping the cap 3 with a liner formed in this way onto the bottle can 2 with a screw, for example, as shown in FIG.
First, after the cap 3 with the liner is put on the mouthpiece 23 of the screwed bottle can 2, the top surface 41 is pressed toward the bottom of the screwed bottle can 2 by the pad 81, and at the same time, the peripheral edge of the top surface 41 by the block 82. Squeeze the shoulders. Further, in this state, while applying a constant load from the upper side of the cylindrical portion 42 by the capping roll 83, the cylindrical portion 42 is pressed against the male screw portion 32 of the base portion 23, and the cylindrical portion 42 is moved along the male screw portion 32. In addition, the female thread portion 46 is formed on the cylindrical portion 42, and the cylindrical lower portion 45 (hem portion) of the cylindrical portion 42 is wound around the bulging portion 33 by the skirt roller 84 to be plastically deformed along the shape of the bulging portion 33, and capping processing is performed. Is done.

  At this time, by pressing the cylindrical portion 42 inward by the capping roll 83, the shape of the male screw portion 32 is transferred to the cylindrical portion 42 of the cap body 4 so as to follow the male screw portion 32, and the female screw portion 46 is formed. At the same time, although not shown, the concave portion 47 is formed so as to follow the convex portion 37 and is screwed to the base portion 23. In addition, the cylindrical lower portion 45 of the cylindrical portion 42 is wound around the lower surface of the bulging portion 33, so that the liner 5 is pressed against the lip portion 31, and the opening portion of the screwed bottle can 2 is sealed by the liner 5. The can 2 is sealed.

A case of opening the bottle with cap 1 thus formed will be described with reference to FIG.
When the cap with liner 3 attached to the bottled can with screw 2 is rotated so as to loosen, first, the sliding layer 51 of the liner 5 and the top surface portion 41 of the cap body 4 start to slide. The peak value of the opening torque when the sliding layer 51 and the top surface portion 41 slide and the liner cap 3 starts to rotate is also referred to as first torque (first torque).
And if the cap 3 with a liner is further rotated, the cylinder upper part 44 in which the internal thread part 46 was formed will rotate, raising upward along the external thread part 32 of the bottled can 2 with a screw. On the other hand, the tube lower portion 45 is locked to the bulging portion 33 of the screwed bottle can 2 and rotates without being lifted together with the tube upper portion 44. At this time, each bridge 43a to which the force pulling upward and the force pulling in the circumferential direction (frictional force) are sequentially broken, and the maximum torque is generated when the cap 3 with liner is opened. This maximum torque is also referred to as a second torque (second torque) with respect to the first torque. When each bridge 43a breaks, the cylinder upper part 44 and the cylinder lower part 45 of the cap with liner 3 are divided, and the cylinder lower part 45 of the cap with liner 3 bulges out the bottled can with screw 2 as a pill fur proof part. The band is left in the portion 33. On the other hand, by further rotating the tube upper portion 44 of the cap 3 with liner with respect to the male screw portion 32, the tube upper portion 44 of the cap 3 with liner 3 can be removed from the screwed bottle can 2 and opened.

Further, when opening the bottle can 1 with a cap, the concave portion 47 provided in the cap 3 with a liner serves as a resistance when rotating over the convex portion 37 provided on the male screw portion 32. The initial opening torque (first torque) at the time of plugging can be increased. Further, the closing torque can be easily finely adjusted by controlling the shape of the convex portion 37.
On the other hand, the shape provided in the cap 3 with the liner is the concave portion 47 and the concave portion 47 is provided at the lower end portion of the female screw portion 46. Therefore, after the concave portion 47 gets over the convex portion 37, the concave portion 47 and the female screw are provided. Since the screw end portion of the portion 46 moves above the convex portion 37, the concave portion 47 does not hinder the engagement of the male screw portion 32 and the female screw portion 46. Moreover, since the cap 3 with a liner moves in a direction (upward) away from the convex portion 37 as it rotates, the convex portion 37 does not become a resistance in the subsequent opening process.
For this reason, in the process of opening the bottle can 1 with a cap, the convex part 37 and the concave part 47 act only to increase the initial opening torque at the time of opening by mutual contact. In the opening process after getting over, the shape of the convex part 37 and the concave part 47 does not become resistance. Therefore, the cap 3 with liner can be smoothly rotated to open the bottle can 1 with cap.

  When the removed cap 3 with liner is put on the cap 23 to seal again, the lower end portion of the female screw portion 46 of the cap 3 with liner is lowered while sliding on the tapered portion 38 of the cap portion 23, and the male screw portion. 32 at the upper end. By rotating the cap with liner 3 to the right, the lower end portion of the female screw portion 46 is guided to the entrance of the screw valley 36 through the screw thread 35 positioned at the upper end portion of the male screw portion 32. Further, by further rotating the cap 3 with the liner, the thread of the female thread portion 46 can be advanced along the thread valley 36 and screwed in.

At this time, the lower end portion of the female screw portion 46 is provided with a concave portion 47 in which a part of the thread is recessed, and a part of the screw valley 36 is protruded radially outward at the lower end portion of the male screw portion 32. Since the convex portion 37 is provided, when the cap 3 with liner is screwed in and closed, the concave portion 47 is fitted into the convex portion 37 of the base portion 23 at the final stage of closing, so that the user is caught. You can feel it. Therefore, since the user can recognize the closure, leakage of contents due to incomplete closure can be prevented.
Further, the shape provided on the cap 3 with the liner is the recess 47, and the recess 47 is provided at the lower end of the female screw portion 46. Therefore, from the beginning of the closing process (screwing process) of the cap 3 with the liner. For the most part up to this point, the recess 47 does not impede the entry of the thread into the thread valley 36 of the male threaded portion 32 and does not become a resistance when the thread valley 36 and the thread are engaged. The concave portion 47 only serves as a resistance when fitted into the convex portion 37 of the screw end portion 32e at the final stage of the plugging process.

In the above embodiment, the convex portion 37 is provided in the thread valley 36 of the male screw portion 32. However, the convex portion may be provided in the screw thread 35 of the male screw portion 32.
In the case where the convex portion 37 is provided on the screw thread 35 of the male screw portion 32 and the case where the convex portion 37 is provided on the screw valley 36, the improvement in the initial opening torque at the time of opening and the closing of the user is recognized. Similar effects can be obtained. In addition, when providing the convex part 37 in the screw trough 36 like the said embodiment, by providing the protrusion height of the convex part 37 to the height below the protrusion height of the screw thread 35, an external appearance surface Thus, the convex portion 37 can be made inconspicuous, and when the user touches the convex portion 37, it can be made difficult to cause a sense of incongruity.

Next, it experimented in order to confirm the effect about the bottle can with a cap of this embodiment.
As an example, using a threaded bottle can in which a convex portion protruding radially outward is formed in a thread valley at the end of a screw located at the lower end of the male thread part, and a cap with a liner is capped on the threaded bottle can By doing so, the bottle can with a cap by which the recessed part was transcribe | transferred to the cap with a liner was manufactured. In addition, as a conventional example, a bottled can with a cap in which a cap with a liner is capped with a threaded bottle can with a threaded bottle can that does not form a convex portion on the male screw part was manufactured. In addition, the internal pressure of each bottle can with a cap was set to 0.1 MPa.

And about each bottle can with a cap, the opening torque which arises at the time of opening of the cap with a liner was confirmed. The cap with liner was opened by rotating the cap with liner from the closing position to the opening position.
The results are shown in FIG. FIG. 8 is an opening torque chart in which the rotation angle (opening angle) of the cap with liner and the opening torque at the rotation angle are plotted.

In FIG. 8, the peak value of the opening torque that appears at the beginning of the opening angle indicated by the symbol F is the first torque when the sliding layer and the top surface start to slide. In addition, the peak value of the opening torque that appears next to the first torque at the start of sliding indicated by the symbol S is the second torque when the bridge between the upper part and the lower part of the cap body is broken. The opening torque required for opening the cap with liner is the largest value.
Then, as is clear from the results of the embodiment shown in FIG. 8 and the conventional example, a convex portion is provided on the male screw portion of the screwed bottle can, and a concave portion corresponding to the convex portion is provided on the cap with liner. The value of 1 torque can be increased.

  In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, a various change can be added.

DESCRIPTION OF SYMBOLS 1 Bottle can with cap 2 Bottle can with screw 3 Cap with liner 4 Cap body 5 Liner 11 Knurl recess 12 Opening portion 13 Hook portion 15 Upper end surface 20 Body portion 21 Shoulder portion 22 Neck portion 23 Base portion 31 Lip portion 32 Male thread portion 32e Screw End portion 33 Expanded portion 35 Thread 35s Incomplete thread portion 36 Thread valley 37 Convex portion 38 Tapered portion 41 Top surface portion 42 Cylindrical portion 43 Slit 43a Bridge 44 Cylinder upper portion 45 Cylinder lower portion 46 Female thread portion 47 Concave portion 51 Sliding layer 52 Sealing Layer 80 Capping machine 81 Pad 82 Block 83 Capping roll 84 Skirt roller 90 Thread forming tool 90A Core 90B Outer core 91A Thread forming convex part (right threaded convex part)
91B Thread Forming Convex (Left Thread Convex)
92A, 92B Screw forming concave portion 95 Convex portion forming portion

Claims (3)

The ferrule portion externally threaded portion is formed in the container with screws, a method for producing a capped vessel fitted with a capped liner screwing state having a liner on the inner surface of the top portion of the cap body,
The mouthpiece, and a lip portion in contact with said liner, said external thread portion formed below the the mouth lip, the skirt portion of the cylindrical portion of the bulging is formed by the cap body is crimped below the male screw portion that may be provided a convex portion protruding threaded end portion located at the lower end of the external thread portion of the mouth section of Ru and a bulging portion radially outward,
When capping the threaded container and the liner cap, the shape of the male screw part is transferred to the cylindrical part so as to follow the male screw part, and the female screw part is formed, and the convex part is copied so as to follow the convex part. A method for producing a container with a cap, wherein the shape of the portion is transferred to form a concave portion to produce the container with a cap . 2. The method for manufacturing a container with a cap according to claim 1, wherein the screw end portion is in a range of 90 ° in a circumferential direction along the male screw portion from an end of the male screw portion. The said convex part is provided in the screw thread or screw trough of the said external thread part, The manufacturing method of the container with a cap of Claim 1 or 2 characterized by the above-mentioned.