JP6466707B2 - Manufacturing method of cap with seal member - Google Patents

Description

  The present invention relates to a method of manufacturing a cap for sealing an upper end opening of an aerosol container, a gas cylinder for a stovetop, and other various food and drink containers. It is about the method.

For example, in the case where a mountain cap as a cap is fixed by caulking to an upper end opening edge of a conventional aerosol container, the mountain cap is molded, and then a rubber packing such as a so-called O-ring is formed on the back surface of the peripheral portion. It was manufactured by crimping the peripheral edge of the opening at the upper end of the container.
In other words, the rubber packing is fitted or attached to the back surface of the peripheral edge of the cap, and is fixed by crimping to the upper opening edge of the container.

  Further, in the aerosol container gasket described in the following patent document, when the mountain cap is attached to the opening of the aerosol container body, the thickness of the aerosol container gasket interposed therebetween is substantially uniform. The purpose is to become.

  The structure is formed of a cylindrical portion and a collar portion following the cylindrical portion, and is used to seal between the opening of the aerosol container main body and a cap fitted to the opening. In the gasket for use, a plurality of protrusions are provided in a discrete state in at least one circumferential direction of the outer peripheral surface and the inner peripheral surface of the cylindrical portion.

Japanese Utility Model Publication No. 6-65260

In the present invention, after the cap is molded, a method is provided in which a seal member is previously joined and integrated with the back surface of the peripheral edge of the cap, that is, a portion crimped to the upper end opening edge of an aerosol container or the like. The task is to do.
Furthermore, in this manufacturing method, it is an object to propose a method that can automate each process and perform these processes extremely reasonably without waste.

1st thing of this invention is a cap fixed to the upper-end opening edge part of a container, Comprising: It is a manufacturing method of the cap by which the sealing member was joined to the peripheral part back surface, Comprising: A metal plate material is stamped and pressed. A first step of forming a cap by molding, a second step of inserting a tube for a seal member into a portion fixed to the container upper end opening edge on the back surface of the cap, and then cutting to an appropriate length, and a heating device And a third step of heating the cap by pressing the peripheral part back surface of the heated cap with the seal member tube using a pressing jig, and welding the seal member tube to the cap peripheral part back surface. Ri consists a fourth step, the metal sheet is a aluminum, using an electromagnetic induction heating device as the heating device, the power supply frequency is 40 kHz ± 20 kHz of the electromagnetic induction heating device In the range of, heating by electromagnetic induction heating device in the third step is the manufacturing method of the sealing member cap which is a two-stage heating process of pre-heating step and the heating step.

  According to a second aspect of the present invention, in the first aspect, a step of applying a synthetic resin paint as an adhesive in advance to one surface of the metal plate used in the first step is characterized in that The manufacturing method of the cap with a sealing member to perform.

  According to a third aspect of the present invention, there is provided the method for producing a cap with a seal member according to the first aspect, wherein an adhesive layer is provided on the inner surface of the tube for the seal member used in the second step.

  According to a fourth aspect of the present invention, in any one of the first to third aspects of the invention, the sealing member tube is disposed so as to surround the sealing member tube in the second step. The cylindrical sealing member tube cutting unit rotates, and the blade portion provided on the inner surface of the unit can cut the sealing member tube.

  According to a fifth aspect of the present invention, there is provided the seal according to the second or fourth aspect, wherein the synthetic resin paint applied to the metal plate material is obtained by dispersing a thermoplastic resin in the synthetic resin paint. It is a manufacturing method of a cap with a member.

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According to a sixth aspect of the present invention, in each of the above-described inventions, all the steps after the second step are performed on one substantially circular turntable, and the outer periphery of the turntable has a constant interval. A receiving portion is formed, and each cap is fed into the receiving portion with the back side facing up, the second and subsequent steps are sequentially performed, and the completed cap with the seal member is sequentially fed out. It is a manufacturing method of the cap with a sealing member.

According to a seventh aspect of the present invention, in the sixth aspect , the turntable rotates intermittently with a fixed stop time, and the stop time is set between 0.3 seconds and 2.0 seconds. In the manufacturing method of the cap with the seal member, all the steps from the second step to the fourth step are sequentially performed during the stop time.

According to an eighth aspect of the present invention, in the sixth or seventh aspect of the invention, after the heating step by the electromagnetic induction heating device in the third step, a cooling step for cooling the cap with the seal member is added. Is a method of manufacturing a cap with a seal member, characterized by comprising a step of blowing cold air.

According to a ninth aspect of the present invention, in the eighth aspect , after the cooling step, an inspection step for inspecting a welding position of the seal member is provided, and this inspection step is a distance from the back surface of the cap to the seal member. It is a manufacturing method of the cap with a seal member characterized by performing by measuring.

According to a tenth aspect of the present invention, in any of the second to ninth aspects of the invention, in the cap with the seal member, the peel load of the seal member is 0.5 kgf or more, and the rotational torque is 0.5 kgf. -It is a manufacturing method of the cap with a sealing member characterized by being cm or more.

  In the first one of the present invention, since the seal member has already been welded and integrated on the back surface of the peripheral edge of the cap, it can be fixed by caulking as it is to the upper end opening edge of various containers. Manufacturing is simplified.

Conventionally, when the cap is swaged and fixed to the container, one process for inserting or interposing the rubber packing is redundant, and this process can be omitted.
For example, when an aerosol container is manufactured, in the molding process which is the first process of the cap, it may be formed into a mountain cap shape for an aerosol container.

  Thus, by adopting the manufacturing method according to the present invention, a cap having a sealing member welded to the back surface of the peripheral edge portion is manufactured in advance, and this cap can be easily fixed to the container as it is. is there.

Furthermore, it is also possible to mount the molded cap on the conveyance path and realize each manufacturing process along the flow of a series of automatic manufacturing processes.
The pressing jig used in the fourth step can also be manufactured in conformity with the shape of the back surface of the peripheral edge of the cap, and a desired shape can be used as appropriate.
In the present invention, it is specified that aluminum is used as the metal plate material.
Further, in the present invention, an electromagnetic induction heating device is used as the heating device, the cap is heated pinpointed, and the sealing member tube cut at the same time can be welded.
When this aluminum is used, the electromagnetic induction heating device is specified to have a power supply frequency in the range of 40 kHz ± 20 kHz.
The reason is as follows.
When a metal is heated by an electromagnetic induction heating device, a metal suitable for this is a material having magnetism and a large electric resistance.
Therefore, tin (iron) is magnetic and has high electric resistance, so it is easy to be heated, and stainless steel is not magnetic, but it is easy to heat because of its high electric resistance.
On the other hand, aluminum is hard to be heated because it has no magnetism and low electrical resistance.
Electromagnetic induction heating is characterized in that the current is more likely to concentrate on the surface than the inside of the object to be heated, and the surface is easily heated. This is called the skin effect. The effect is increased, and the effect is increased as the electrical resistance of the material is smaller.
Aluminum has low electrical resistance and poor heating efficiency, but taking advantage of this low electrical resistance to increase the skin effect, that is, it can be efficiently heated by using a high frequency device. The present inventors have found what can be done and have arrived at the present invention.
In the present invention, the heating by the electromagnetic induction heating device in the third step is a two-step heating step of preheating and main heating, and thereby the heating efficiency is further improved.
The heating by this two-stage process contributes to the automation of the production method of the present invention, and the reason will be described later.

  In the second one of the present invention, a metal plate material used in the first step is preliminarily added with a step of applying a synthetic resin paint as an adhesive in advance, and the metal is a molding material in advance. One surface of the plate-making material, this surface is the back surface of the cap, but by applying an adhesive to this surface in advance, the welding of the seal member tube in the fourth step is made stronger. It can be done.

In the third aspect of the present invention, as in the second aspect, an adhesive layer may be provided on the inner surface of the sealing member tube, and an adhesive layer is provided on the inner surface of the sealing member tube. It is specified to use things.
The effect is the same as that of the second invention.

In the fourth aspect of the present invention, the step of cutting the tube for sealing member in the second step is further limited, and a cylindrical sealing member tube cutting unit is used for this cutting. .
In other words, the sealing member tube cutting unit is a cylindrical one arranged so as to surround the sealing member tube, and this unit rotates, and the blade provided on the inner surface of the unit cuts the sealing member tube. Then, it is specified that the tube for the seal member having an appropriate length can be mounted on the rear surface of the peripheral edge of the cap.
Thereby, the welding operation | work of the tube for sealing members in the 4th process which is a next process becomes easy.

  According to a fifth aspect of the present invention, in the second and fourth aspects of the present invention, the material of the synthetic resin paint is embodied. That is, as the synthetic resin paint, polyethylene or the like is used as the synthetic resin paint. It was specified that the one in which the thermoplastic resin was dispersed was used.

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In the sixth aspect of the present invention, the manufacturing process is automated, that is, all the processes after the second process are performed on one substantially circular turntable. A receiving portion is formed on the outer peripheral portion at a constant interval, and each cap is fed into the receiving portion with the back face up, and the second and subsequent steps are sequentially performed, and the completed sealing member is attached. The cap is sent out sequentially.
That is, by using this substantially circular turntable, all steps from the second step to the fourth step are performed during one rotation, which contributes to automation.

According to a seventh aspect of the present invention, in the sixth aspect of the invention, the intermittent rotation time of the turntable is specified, and the constant stop time is set between 0.3 seconds and 2.0 seconds. All the steps from the second step to the fourth step can be executed.
Due to this time, even in the heating step of the third step, it is possible to perform both the preliminary heating time and the main heating time in a total of 0.6 seconds to 4.0 seconds. Sufficient time for the heating process can be secured.

In the eighth aspect of the present invention, a cooling step is added after the third step.
The finished product is cooled by this cooling process, and there is no problem in the subsequent inspection process and delivery process, and no trouble occurs.

In the 9th thing of this invention, the test process for test | inspecting the joining state of a sealing member is added after the said cooling process.
This inspection step is performed by measuring the distance from the back surface (disposed on the front surface side) of the cap to the upper end of the seal member.
Thereby, it can be checked whether the sealing member is properly joined.

According to a tenth aspect of the present invention, in the cap with a seal member manufactured by the manufacturing method according to the second to ninth aspects, the peeling load and the rotational torque of the seal member are more than predetermined. It is specified as follows.
That is, the peeling load is set to 0.5 kgf, the rotational torque is limited to 0.5 kgf · cm or more, and the adhesion between the seal member and the cap is made firmer.

The cap with a sealing member manufactured by the manufacturing method which concerns on this invention is shown, The (A) is a surface side perspective view, The (B) is a back surface side perspective view, The (C) is C of (B) figure. FIG. FIG. 2 is a perspective view of the container in a state where the cap illustrated in FIG. 1 is caulked and fixed to an upper end opening edge of the container. The 2nd process of this invention is shown, The (A) is a conceptual diagram which illustrates the process of inserting and cutting | disconnecting the front-end | tip part of the tube for sealing members on the back surface side of a cap on a conveyance stand, (B) FIG. 4 is a conceptual diagram illustrating a state in which a distal end portion of a sealing member tube is inserted on the back side of a cap. It is the conceptual diagram which illustrated the tube cutting unit for seal members used at the 2nd process of this invention, and its cutting condition, The (A) shows the state cut | disconnected by the tube cutting unit for seal members, The (B) The state where the tube for sealing members was cut is illustrated. It is a conceptual diagram which illustrates the heating process by the electromagnetic induction heating apparatus which is the 3rd process of this invention. It is a conceptual diagram which shows the 4th process of this invention, and shows the state which presses a press jig | tool to the peripheral part back surface of the cap (with the tube for sealing members) heated by the electromagnetic induction heating apparatus, The (A) is a press A welded state is shown, and (B) shows a state in which the sealing member tube is welded to the back surface of the peripheral edge of the cap by the pressing jig and the pressing jig is returned to the original position above. It is a conceptual diagram which shows the whole flow of each process shown to the said FIG. 3 thru | or FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a cap with a seal member manufactured by the manufacturing method according to the present invention, in which (A) is a front side perspective view, (B) is a back side perspective view, and (C) is (B) FIG. 4 is an enlarged cross-sectional view taken along the line CC of FIG.
FIG. 2 is a perspective view of the container in a state where the cap shown in FIG. 1 is caulked and fixed to the upper end opening edge of the container.

  The cap 10 manufactured by the manufacturing method of the present invention is manufactured by punching a metal plate into a circle and drawing the circular plate. The metal plate used here is made of aluminum.

A curved molded portion 12 is formed on the peripheral edge of the cap 10 so as to be curved in a downward opening so as to be crimped and fixed to the upper end opening edge of the container C.
A central portion 11 on the center side of the curved molded portion 12 protrudes on the back side of the cap 10, and the central portion 11 has a flat shape.

The curved molding portion 12 at the peripheral edge of the cap 10 is caulked and fixed to the upper end opening edge of the container C.
The seal member 15 is joined to the back surface of the curved forming portion 12 of the cap 10.

Thus, the cap 10 to which the seal member 15 is bonded in advance is manufactured integrally by the manufacturing method according to the present invention.
In addition, it is also possible to apply | coat an adhesive agent beforehand to one side of the metal board | plate material used here.

As this adhesive, for example, a synthetic resin paint in which fine particles of a thermoplastic resin such as polyethylene are dispersed can be used.
Thereby, when the sealing member tube as the sealing member is welded in the subsequent third step and fourth step, the bonding becomes more reliable.
Hereinafter, the manufacturing method according to the present invention will be described with reference to FIGS.

FIG. 3 shows a second step of the present invention, and FIG. 3A is a conceptual diagram illustrating a step of inserting and cutting the distal end portion of the tube for the seal member on the back surface side of the cap on the transport table. (B) is a conceptual diagram illustrating a state in which the tip of the sealing member tube is inserted on the back side of the cap.
That is, this step illustrates the second step after the first step of manufacturing the cap 10 by punching from a metal plate material and performing a forming process.

  In the second step, the front end of the sealing member tube is inserted into the peripheral portion of the cap 10 which has been sequentially conveyed one by one with the central portion 11 on the back surface facing upward (front surface side) (FIG. 3 ( B) (see the figure), the sealing member tube 15 is cut to a predetermined length by a cylindrical sealing member tube cutting unit 21 which is appropriately arranged on the conveying table 20. In this embodiment, the predetermined length is about 7 mm.

In this way, the seal member tube 15 is cut and welded to the cap 10 in a later step to become a seal member.
In this embodiment, the sealing member tube 15 is made of a synthetic resin and uses a polyethylene tube.

An insertable blade portion 22 is provided on the inner wall surface of the seal member tube cutting unit 21, and the blade portion 22 projects from the inner wall surface of the seal member tube cutting unit 21 to cut the seal member tube 15. .
Although not shown, a pair of feed rollers are provided in the upper portion of the seal member tube 15, and the seal member tube 15 is fed downward by a predetermined length by intermittent rotation of the feed roller. Then, it is inserted into the peripheral edge of the back surface facing the upper side of the cap 10, that is, the peripheral wall surface of the central portion 11, and then cut by the sealing member tube cutting unit 21.

Here, it is also possible to use the sealing member tube 15 used in which an adhesive layer is provided on the inner surface.
By using this, after the sealing member tube 15 is inserted into the peripheral portion of the back surface of the cap 10, it can be securely bonded to the peripheral portion of the back surface of the cap 10 in the subsequent third and fourth steps. Because.
When using the sealing member tube 15 provided with an adhesive layer on the inner surface, the step of applying an adhesive to one surface of the metal plate is not necessary.

  FIG. 4 is a conceptual diagram illustrating the sealing member tube cutting unit used in the second step and the cutting state thereof. FIG. 4A shows a state in which the sealing member tube cutting unit is cut by the sealing member tube cutting unit. ) Shows a state in which the tube for sealing member is cut.

The sealing member tube 15 is made of a polyethylene tube having a diameter of about 37 mm, and the tip thereof is covered so that the peripheral portion (the peripheral wall portion of the central portion 11) on the back surface side of the cap 10 is inserted into the tube ( (See FIG. 4A).
Thereafter, as shown in FIG. 4 (B), the blade 22 protrudes inward from the inner wall surface of the sealing member tube cutting unit 21, and then the sealing member tube cutting unit 21 rotates in the circumferential direction. The member tube 15 is cut. The cutting length is about 7 mm in this embodiment.

FIG. 5 is a conceptual diagram illustrating the third step of the present invention.
By this third step, the cut sealing member tube 15 is heated above the electromagnetic induction heating device 30 in a state where it is attached to the back surface of the peripheral portion of the cap 10 and is heated by the pressing jig 31. FIG. 5 shows a state immediately before pressing by the pressing jig 31.

  As already known, the electromagnetic induction heating device 30 arranges an article to be heated (metal / cap 10 in this case) in a non-contact manner in the vicinity of a winding output portion called a heating coil 32, and this coil 32. By causing a high frequency current to flow through the coil 32, a strong magnetic field is generated around the coil 32, whereby an alternating magnetic flux (high frequency magnetic flux) penetrates a metal that is an unheated article, and a high-density eddy current is induced. This is an apparatus in which an unheated article (cap 10) is heated by self-heating.

Here, as already described, since the article to be heated is an aluminum plate, the heating frequency needs to be set within a range of 40 kHz ± 20 kHz.
Aluminum has no magnetism and low electrical resistance, so it is difficult to heat, but as described above, by using the skin effect that is characteristic of electromagnetic induction heating, its heating frequency is set high. By setting the above range, the aluminum was successfully heated.

Moreover, although the heating process by the electromagnetic induction heating apparatus which is this 3rd process is demonstrated later, it is very preferable to set it as the two-step heating process of preheating and this heating.
This is because the manufacturing method of the present invention including the above manufacturing process and the subsequent manufacturing process is executed by a predetermined automatic manufacturing line, and therefore, a predetermined time is set in each process. In the present invention, since the time setting is set to a certain time, a two-step heating process is prepared in order to sufficiently secure the heating time.

  FIG. 6 is a conceptual diagram showing a state in which a pressing jig is pressed against the back surface of the peripheral edge of a cap (with a seal member tube) heated by the electromagnetic induction heating device, and (A) shows a pressed / welded state. (B) shows a state in which the sealing member tube is welded to the back surface of the peripheral edge of the cap by the pressing jig, and the pressing jig is returned to the original position above.

Although this state is the fourth step, as shown in FIG. 4, the cut sealing member tube 15 is bent from the peripheral portion back surface of the cap 10, that is, from the peripheral wall portion of the central portion 11 of the cap 10. The seal member 15 is welded to the back surface of 12.
That is, the sealing member tube 15 is also indirectly heated by the cap 10 heated by the electromagnetic induction heating device, and is then pressed from above by the pressing jig 31, and is appropriately centered from the curve forming portion 12 of the cap 10. It is welded to the back surface of the peripheral wall portion of the portion 11.

At this time, as described above, a synthetic resin paint as an adhesive is applied to the back surface of the cap 10, or the adhesive layer provided on the inner surface of the tube 15 for the seal member further bonds the two together. It will be solid and secure.
Here, this adhesive strength will be further described. As for this adhesive strength, it is extremely preferable that the peel load is 0.5 kgf or more by repeating many experiments, and the rotational torque is 0.5 kgf. It has been found that it is extremely preferable that the distance is cm or more.
The preferable peeling load and rotational torque are specified in the claims of the present application.

The pressing jig 31 in the fourth step also has a cylindrical shape, and the end surface and the inner surface shape of the lower end thereof are the curved molded portion 12 of the cap 10, the sealing member tube 15, and the upward peripheral wall of the cap 10. It has a shape that matches the outer shape of the part.
Accordingly, the sealing member tube 15 is appropriately welded to the back surface of the curved forming portion 12 of the cap 10.

FIG. 7 is a conceptual diagram showing an example in which each process shown in FIGS. 3 to 6 is automated.
In the present invention, the entire manufacturing process is performed by a series of flow operations.
Therefore, in the present invention, one substantially circular turntable 42 is used.
The turntable 42 rotates around the central shaft portion 42c on the circular base portion 42g.

Twelve receiving portions 43 that can receive the cap 10 are provided at the same interval on the peripheral portion of the turntable 42.
The receiving portion 43 has a shape in which the outer shape can receive the cap 10 and is formed of a through hole.

That is, the cap 10 is received by the receiving portion 43 and placed on the base portion 42g, and can sequentially make one round of the outer peripheral portion of the turntable 42 according to the rotation of the turntable 42.
The seal member is joined to the cap 10 while the turntable 42 makes one round.

First, the caps 10 formed in the first step are sequentially sent from a carry-in conveyance path 41 formed of a belt conveyor to a turntable 42 that rotates intermittently.
As described above, the turntable 42 has twelve receiving portions 43 that can receive the caps 10 one by one on the outer peripheral portion thereof at the same interval.

  The caps 10 sent from the carry-in conveyance path 41 are sequentially sent to the receiving portion 43, and are sequentially sent by the intermittent left rotation of the turntable 42 for each pitch, and move to the position of the tube cutting unit 21 for the seal member. And the front-end | tip part of the tube for sealing members is inserted in the peripheral part back surface of the cap 10, and is cut.

In the figure, reference numeral 21 denotes a sealing member tube cutting unit.
When the cap 10 is sent to the position of the sealing member tube cutting unit 21, the sealing member tube is sent downward from above and inserted into the peripheral wall portion of the central portion of the back surface of the cap 10, and is appropriately lengthened. It will be cut.
This description is as described in FIG.

The cap 10 in which the cut seal member tube is inserted is further rotated leftward on the turntable 42 and fed.
In the figure, reference numeral 23 denotes a tube pressing tool for sealing member.
This tube pusher 23 for seal member performs only the operation | work which pushes the tube for seal members a little downwards, in order to install the cut | disconnected tube for seal members by the surrounding wall part of the cap 10 reliably.
In this way, the sealing member tube is securely attached to the back peripheral wall portion of the cap 10 and contributes to the subsequent work more accurately.

Next is a heating process by the electromagnetic induction heating device 30.
In this embodiment, this heating process is performed by a two-stage heating process.
First, preliminary heating is performed by the first electromagnetic induction heating device 30a.
Thereafter, the main heating is performed by the second electromagnetic induction heating device 30b at the next position.
Simultaneously at the position of the main heating, the sealing member tube is welded to the back surface of the peripheral portion of the cap 10, that is, the back surface of the curved forming portion, by the upper pressing jig 31 to complete the cap with the sealing member (details are described above). Description of FIGS. 5 and 6).

As described above, in the present invention, the manufacturing process from the second process to the fourth process is performed by intermittent rotation of the turntable 42. In this embodiment, the predetermined stop time is 0.5 seconds. It is set.
Therefore, the preheating time and the main heating time are 0.5 seconds each, which is 1.0 seconds in total.
The predetermined stop time can be appropriately set between 0.3 seconds and 2.0 seconds, but the heating time can be set between 0.6 seconds and 4.0 seconds in total. It becomes.

In the figure, reference numeral 24 denotes a cooling device.
The cooling device 24 is a device that blows cold air on the cap 10 to which the sealing member is welded.
This is to ensure that the inspection process after the completed cap 10 with the seal member is performed more accurately.

In the figure, reference numeral 27 denotes an inspection device, and this inspection device 27 is a device that measures the height from the back surface of the cap to the upper end of the seal member.
With this inspection device 27, it is possible to inspect whether or not the seal member is properly attached to the cap 10 by measuring the distance from the back surface (center portion 11) of the cap 10 to the upper end portion of the seal member. .

Thereafter, the completed cap 10 with a seal member is sent to the final carry-out conveyance path 45, and the final inspection of the product is performed by an inspection camera in the middle thereof, thereby completing the product.
The feeding to the carry-out conveyance path 45 is such that the receiving portion 43 provided on the outer periphery of the turntable 42 falls downward from a through hole provided in the base portion 42g at a position located above the carry-out conveyance path 45, and It falls on the path 45 and is carried out.
As described above, the manufacturing process of the present invention is automatically performed sequentially from the second process to the fourth process in which the seal member is joined to the cap 10 formed in the first process by the automatic line using the turntable 42. It will be.

As mentioned above, although embodiment of this invention was described, in the manufacturing method of this invention, that embodiment can be changed suitably and can be performed.
First of all, in the above embodiment, an electromagnetic induction heating device is used as a heating device, but other heating devices can also be used.

In the production method of the present invention, it is also possible to add a step of previously applying a synthetic resin paint as an adhesive to one surface of the metal plate used in the first step.
As this synthetic resin coating, for example, a synthetic resin coating such as an epoxy phenol resin coating in which fine particles of thermoplastic resin such as polyethylene are dispersed can be used.
In addition, any synthetic resin paint having an adhesive function can be used.

On the other hand, this adhesive may be coated or applied on the inner surface of the seal member tube, and of course, a seal member tube having such an adhesive layer on the inner surface may be used. .
Also in this case, the adhesive used as the adhesive layer is preferably one that exhibits an adhesive force when heated.

As the material of the cap, the one made of aluminum is used in the above embodiment, but the material is free, and various metals such as steel, stainless steel, copper, brass and the like can be appropriately selected and used.
In addition, when using the thing made from aluminum, as above-mentioned, when using an electromagnetic induction heating apparatus, it is necessary to make the power supply frequency the thing of a predetermined range.

The shape of the cap is not limited to that shown in FIG. 1 and can be changed as appropriate. The cap may be provided with a through-hole at the center thereof to fix the injection valve. The container can be implemented as an aerosol container.
In short, in the cap according to the present invention, it suffices if the curved molded portion is formed at least at the peripheral portion thereof, and the sealing member is joined to the back side of the curved molded portion, and the form of the central portion is freely set. The design can be changed.

  The material of the tube for the seal member can also be freely selected. For example, synthetic resin, elastomer, rubber, etc. can be used, and its diameter and thickness are also free, and it is sufficient to match the shape of the cap. .

In the third embodiment, the heating step of the third step employs a two-step heating method of preheating and main heating. However, this heating can be performed only by one heating.
In that case, it is necessary to set the stop time of the intermittent rotation of the turntable to a longer time, for example, 1.0 to 2.0 seconds.

The heating by the electromagnetic induction heating device in the third step and the pressing / welding work by the pressing jig in the fourth step are sequentially performed, but can be performed simultaneously.
As described above, in the present invention, it has been possible to provide a manufacturing method capable of manufacturing a cap with a seal member integrally by welding a seal member to the back surface of a peripheral edge of a molded cap by a series of flow operations. .

DESCRIPTION OF SYMBOLS 10 Cap 11 Center part 12 Curve molding part 15 Seal member (tube for seal members)
DESCRIPTION OF SYMBOLS 20 Conveyance stand 21 Tube cutting unit for sealing members 22 Blade part 30, 30a, 30b Electromagnetic induction heating device 31 Pressing jig 32 Coil 41 Carry-in conveyance path 42 Turntable 43 Receiving part 45 Carry-out conveyance path C Container

Claims (10)

A cap that is fixed to the upper end opening edge of the container, and a manufacturing method of a cap in which a seal member is joined to the back surface of the peripheral edge,
A first step of punching a metal plate and press-molding to produce a cap;
A second step of inserting a seal member tube into a portion to be fixed to the container upper end opening edge on the back surface of the cap, and then cutting the tube to a suitable length;
A third step of heating the cap with a heating device;
A peripheral portion rear face of the heated the sealing member tube capped by pressing with a pressing tool, Ri consists a fourth step of welding wear the sealing member tube on the back cap periphery,
The metal plate is made of aluminum, and an electromagnetic induction heating device is used as a heating device, and the power supply frequency of the electromagnetic induction heating device is within a range of 40 kHz ± 20 kHz,
The method for manufacturing a cap with a seal member, wherein the heating by the electromagnetic induction heating device in the third step is a two-step heating step including a preheating step and a main heating step .   2. The method for producing a cap with a seal member according to claim 1, wherein a step of applying a synthetic resin paint as an adhesive in advance to one surface of the metal plate used in the first step is added.   The method for producing a cap with a seal member according to claim 1, wherein an adhesive layer is provided on an inner surface of the tube for a seal member used in the second step.   In the second step, when the sealing member tube is cut, a cylindrical sealing member tube cutting unit disposed so as to surround the sealing member tube rotates and is provided on the inner surface of the unit. The manufacturing method of the cap with a seal member according to any one of claims 1 to 3, wherein the blade portion can cut the tube for the seal member.   The method for producing a cap with a seal member according to claim 2 or 4, wherein the synthetic resin paint applied to the metal plate material is obtained by dispersing a thermoplastic resin in the synthetic resin paint. All the steps after the second step are performed on one substantially circular turntable,
On the outer periphery of the turntable, receiving portions are formed at regular intervals, and one cap is sent to each receiving portion with the back side up, and the second and subsequent steps are sequentially performed and completed. The method for producing a cap with a seal member according to any one of claims 1 to 5 , wherein the cap with the seal member is sequentially fed out. The turntable rotates intermittently with a fixed stop time, and the stop time is set between 0.3 seconds and 2.0 seconds. During the stop time, the second process to the fourth process are performed. All the processes are performed sequentially, The manufacturing method of the cap with a sealing member of Claim 6 characterized by the above-mentioned. After the heating step by the electromagnetic induction heating device in the third step, a cooling step for cooling the cap with the seal member is added,
The method for manufacturing a cap with a seal member according to claim 6 or 7 , wherein the cooling step includes a step of blowing cold air. After the cooling step, an inspection step for inspecting the welding position of the seal member is provided, in claim 8, characterized in that the inspection process is performed by measuring the distance from the back surface of the cap to the sealing member The manufacturing method of the cap with a sealing member of description. The seal cap with a seal member according to any one of claims 2 to 9 , wherein a peeling load of the seal member is 0.5 kgf or more and a rotational torque thereof is 0.5 kgf · cm or more. Of manufacturing a cap with a sealing member.