JPS6160730B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing an easy-to-open metal lid;
More specifically, the present invention relates to an apparatus for manufacturing an easy-to-open metal lid in which a peel-off piece or a peel-off piece and a lining piece are attached to cover the opening.

The metal lid 1 that is easy to open in the present invention is, for example, as shown in FIG. 1 and FIG. A metal lid having a heat-sealable or heat-sensitive adhesive peel-off piece 5 bonded by thermocompression to the outer surface of the lid so as to cover an opening 4 provided in the portion 3, leaving a knob portion 5a;
Alternatively, as shown in FIGS. 1 and 2b, it is a metal lid in which the above-mentioned peel-off piece 5 is bonded to the outer surface of the lid to cover the opening 4, and a lining piece 6 is bonded by thermocompression to the inner surface of the lid. The latter lining piece 6 is provided when the end face of the opening 4 requires corrosion protection or rust prevention depending on the type of contents.

An object of the present invention is to provide a compact manufacturing device capable of high-speed production of metal lids that are easy to open as described above. Another object of the present invention is to provide an easy-to-open metal lid manufacturing device that can securely attach a lining piece.

In order to achieve the above object, the present invention forms an opening in a metal lid blank, and covers the opening with a heat-sealable or heat-sensitive peelable piece on the surface that is to become the outer surface of the metal lid blank. An apparatus for manufacturing a metal lid that is easy to open by attaching the metal lid, the apparatus comprising a plurality of holders having a through hole for accommodating the metal lid blank and a holder for the metal lid blank provided around the periphery of the through hole. A transfer plate for the metal lid blank is provided in which a section is provided along the circumferential direction and performs an intermittent circumferential movement at a predetermined timing, and a plurality of metal lid blanks are sequentially moved along the transfer path of the metal lid blank. A stop position of the holding part is provided, and the first stop position of the holding part is provided with a device for locking the metal lid blank to the holding tool, and the second stop position of the holding part is provided with a device for locking the metal lid blank to the holding tool. A device consisting of a punch and a die is provided for forming the opening in the metal lid blank, the opening being passed through a third stop position of the holding part or along the transport path upstream or downstream thereof. A high-frequency induction heating coil is installed near the opening.
A tear-off piece pressing device is provided at the fourth stop position of the holding portion or along the transfer path for pressing the peel-off piece onto the surface that is to become the outer surface of the metal lid blank while covering the opening; To provide an easy-to-open metal lid manufacturing device, characterized in that a device for separating the metal lid to which the peeling piece is attached is detached from the holder is provided at the fifth stop position of the holding part. .

Further, the present invention forms an opening in the metal lid blank, and covers the metal lid with a heat-fusible or heat-sensitive adhesive peeling piece and a lining piece on the outer surface and inner surface of the metal lid blank, respectively. An apparatus for manufacturing a metal lid that is easy to open by attaching the metal lid, the apparatus comprising a plurality of holders having a through hole for accommodating the metal lid blank and a holder for the metal lid blank provided around the periphery of the through hole. A plurality of metal lid blank transfer plates are provided along the circumferential direction and perform intermittent circumferential movements at predetermined timings, and the metal lid blanks are sequentially moved along the transfer path of the metal lid blanks. A stop position of the holding part is arranged, and a first stop position of the holding part is arranged.
A stop position is provided with a device for locking the metal lid blank to the holder, and a second stop position of the holder is provided with a device for locking the metal lid blank to the holder, and a device from a punch and die for forming the opening in the metal lid blank is provided at a second stop position of the holder. a first high-frequency induction heating coil adjacent to the opening through which it passes, at a third stop position of the holding part or along the transfer path upstream and/or downstream thereof; A lining pressing device is provided at a fourth stop position of the holding section for pressing the lining piece onto the surface that is to become the inner surface of the metal lid blank while covering the opening; A second high-frequency induction heating coil is provided in the fifth stop position and along the transfer path upstream and/or downstream of the fifth stop position in close proximity to the opening through which the second high-frequency induction heating coil passes. A peel-off piece pressing device is provided at the stop position of No. 6 or along the transfer path to press the peel-off piece onto the surface that is to become the outer surface of the metal lid blank, covering the opening; A device for thermocompressing the pressed lining piece and the peel-off piece to each other is provided at the stop position 7, and furthermore, at an eighth stop position of the holding part, the lining piece and the peel-off piece are attached to each other. The present invention provides an easy-to-open metal lid manufacturing device, characterized in that it is equipped with a device for separating the metal lid from the holder.

Furthermore, the present invention forms an opening in the metal lid blank, and covers the opening and applies a heat-fusible or heat-sensitive adhesive peel-off piece and a lining piece to the outer and inner surfaces of the metal lid blank, respectively. An apparatus for manufacturing a metal lid that is easy to open by attaching the metal lid, the apparatus comprising a plurality of holders having a through hole for accommodating the metal lid blank and a holder for the metal lid blank provided around the periphery of the through hole. A plurality of metal lid blank transfer plates are provided along the circumferential direction and perform intermittent circumferential movements at predetermined timings, and the metal lid blanks are sequentially moved along the transfer path of the metal lid blanks. A stop position of the holding part is arranged, and a first stop position of the holding part is arranged.
A stop position is provided with a device for locking the metal lid blank to the holder, and a second stop position of the holder is provided with a device from a punch and a die for forming the opening in the metal lid blank. a first high-frequency induction heating device at a third stop position of the holding part, or at the third stop position and along the transfer path upstream and/or downstream thereof, adjacent to the opening through which it passes; A coil is provided at a fourth stop position of the holding part, and a peeling piece pressing device is provided at a fourth stop position of the holding part for pressing the peeling piece to a surface that is to be the outer surface of the metal lid blank while covering the opening; 5th of
a second high-frequency induction heating coil is provided in the stop position of the retainer and along the transfer path upstream and/or downstream of the fifth stop position, adjacent to the opening through which the sixth high-frequency induction heating coil passes; A lining piece pressing device for pressing the lining piece onto the surface that is to become the inner surface of the metal lid blank while covering the opening is provided at the stop position or along the transfer path; At the stop position, a device is provided for thermally pressing the pressed lining piece and the pull-off piece to each other, and furthermore, at the eighth stop position of the holding part, the lining piece and the pull-off piece are attached to each other. The present invention provides an easy-to-open metal lid manufacturing device, characterized in that it is equipped with a device for separating the metal lid from the holder.

However, in the present invention, the metal lid blank is held on a transfer plate that performs intermittent circumferential movement, so that the metal lid blank is held in a transfer plate that makes intermittent circumferential movements, and the metal lid blank is not released in the middle of the process. By adopting a mechanism that progresses sequentially through the steps, accurate positioning in each step is facilitated, and during transfer, the object to be adhered is first heated by a high-frequency induction heating coil, and then a sufficiently heated metal lid is heated. A peelable piece or a lining piece having heat-fusible or heat-sensitive adhesive properties is pressed onto the top to complete the adhesion;
A particularly important feature is that this procedure provides a machine that is extremely compact and capable of high-speed production. The present invention will be described below with reference to drawings showing embodiments.

In Figures 3 and 4, 7 is a peel-off piece 5 on the outer surface.
8 shows a manufacturing device for a metal lid 1 that can be easily opened and is thermally bonded (the lining piece 6 is not attached); The metal lid with the curled portion 2 formed thereon is sequentially transferred to open the opening 4.
horizontal rotary transfer plate for forming etc., 10
is a horizontal rotary disk disposed below the rotary transfer plate 8 in order to supply the metal lid blank 9 to the rotary transfer plate 8 and to send the formed metal cover 1 that is easy to open to the next process. There is.

The rotary transfer plate 8 and the rotary disk 10 are each
The base 13 is centered around the shafts 11 and 12.
They are configured to perform intermittent rotational movement in the directions of the arrows at predetermined timings by a driving device (not shown) such as a Geneva mechanism housed inside the respective parts.

The rotary transfer plate 8 is provided with a plurality of (six in FIG. 4) holding portions 16 formed at equal intervals along the circumferential direction as shown in FIG. is equipped with a circular through hole 14 and a plurality of (three in this embodiment) holders 15 provided at the periphery of the through hole 14 for locking the metal lid blank 9 (see FIG. 6). ). During the intermittent rotation of the rotary transfer plate 8, each holding portion 16 is
Stops at fixed positions D, E and F. The rotary disk 10 has four circular through holes 17 (see FIG. 6) at equal intervals along the circumference and a shelf 17 on the upper periphery.
A metal lid blank 9 and a mounting portion 18 for the metal lid 1 are formed. During the intermittent rotation of the rotary disk 10, each mounting portion 18 is placed at
Stops at fixed positions F, G and H. During the period when the rotary disk 10 is stopped, the metal lid blank 9 is placed on the placing part 18 at the stop position G by a feed mechanism (not shown), while the metal lid blank 9 is placed on the placing part 18 at the stopping position H.
From step 8, the easy-to-open metal lid 1 with the peel-off piece 5 attached thereto is delivered to the next step by a delivery mechanism (not shown).

As best shown in FIG. 5, which is an enlarged plan view of the vicinity of the holding part 16 at the stop position A, and FIG. 6, which is a vertical cross-sectional view thereof, a claw part 15a is provided on the inner surface near the upper part of the holding tool 15. Further, a force in the horizontal direction toward the center of the through hole 14 is constantly applied to the holder 15 by a pressing spring 19. Note that the amount of horizontal movement of the holder 15 is regulated by the lower protrusion 15b and the hole 20. Further, on the upper surface of the holding part 16, there are a plurality of (three in FIG. 5) presser plates 21 that partially protrude above the through hole 14.
is fixedly provided to prevent the metal lid blank 9, which is locked by the claw portion 15a, from being pushed upward by the pressing force from below. Furthermore, the fifth
In the figure, the region 22 sandwiched by two concentric arcs of dashed dotted lines is the opening 4 of the metal lid blank 9.
The holder 15 and the presser plate 21 are arranged outside the region 22. The region 22 includes high frequency induction heating coils 23, 2
This is to prevent the presser plate 21 projecting upward from the holding part 16 from being heated at that time. Further, since the region 22 passes directly above the peeling piece extrusion device 25, the holding portion 16
In order to prevent contact with the pressing device 25, a circumferential groove 26 (sixth
This is because the following is provided.

As shown in FIG. 6, the holding part 16 is normally fixed in the through hole 8a of the rotary transfer plate 8 by bolts 27 and springs 28 so that its upper surface 16a substantially coincides with the upper surface 8b of the rotary transfer plate 8. However, when the upper surface 16a of the holding portion 16 is pressed downward, the holding portion 16 is lowered, and when the pressure is released, the holding portion 16 is returned to its original position by the return force of the spring 28.

In the stop position A, the metal lid blank 9 is transferred from the rotary disk 10 to the rotary transfer plate 8 . That is, as shown in FIG. 6, the curl part 2 is placed on the shelf part 17a of the through hole of the rotary disk 10 with the surface (hereinafter referred to as the outer surface) 9a of the panel part 3 facing downward. The metal lid blank 9 is pushed upward by a plunger 29 (driven by a lever, not shown, housed inside the base 13 and operated in synchronization with the rotary disk 10). Curled portion 2 of pushed-up metal lid blank 9
When the end edge of the holder 15 comes into contact with the claw portion 15a of the holder 15, the holder 15 moves outward against the spring 19, and the curled portion 2 rises beyond the claw portion 15a and comes into contact with the holding plate 21. The retainer 15 is the spring 1
The metal lid blank 9 is returned to its original position by the return force of the metal lid blank 9, and thus the metal lid blank 9 is locked to the holder 15.

In the stop position B, an opening 4 is formed in the metal lid blank 9. In FIG. 7, 30 and 31 are a punch and a die, respectively, for forming the opening 4 in cooperation with each other. The punch 30 is attached to the tip of a shank 34 that is fixed to a ram 33 that can be moved up and down by a crank mechanism 32 (see FIG. 3). Further, at the tip of the shank 34, there is a shaft 35 and a spring 38 that can be slid inside.
A pressing plate 36 is provided via the punch 3.
0 is inserted through the through hole 36a of the press plate 26, and its lower end surface 30a is normally in the recess 30 of the press plate 36.
It is located within b. The vertical distance between the lower end surface 30a and the lower end surface 36c of the press plate is made not to be smaller than the vertical distance between the upper surface 16a of the holding part and the surface (hereinafter referred to as the inner surface) 9b that should become the inner surface of the metal lid blank. It is determined. When pressing down the holding part 16 by the pressing plate 36 as described later,
This is to prevent the lower end surface 30a of the punch from pressing and deforming the metal lid blank 9. The dice 31 are mounted on a dice holder 37 fixed to the base 13.
The distance between the upper surface 31a and the shoulder upper surface 31b is determined to be equal to the distance between the outer surface 9b of the metal lid blank and the lower surface 16b of the holding part. The reason why the metal lid blank is held so that its inner surface 9b protrudes above the upper surface 16a of the holding part is to prevent heating of the holding part 16 as much as possible during high-frequency induction heating, which will be described later.

The opening 4 is formed as follows.
By the operation of the crank mechanism 32, the punch 30 and the pressing plate 36 are lowered together with the ram 33 and the shank 34. The lower end surface 36c of the pressing plate is the upper surface 1 of the holding part.
The shank 34 continues to descend even after contacting the shank 6a, but the spring 38 is constructed to be much less flexible than the spring 28.
The spring 28 is expanded without almost contracting, and the metal lid blank 9 is held in the holding part 16.
and the outer surface (lower surface) of the bolt 27 contacts the upper end surface 31a of the die 31, and at the same time the lower surface 16b of the holding portion contacts the upper surface 31b of the die shoulder,
The lowering of the metal lid blank 9 and the holding part 16 is stopped. However, since the shank 34 continues to descend, the spring 38 is compressed, and only the punch 30 descends, collaborating with the die 31 to form the opening 4.
Note that the positions of the punch 30 and the die 31 are determined so that the opening 4 is formed approximately at the center in the radial direction of the region 22 (FIG. 5).

A high-frequency induction heating coil 23 is disposed close to and above a region 22 through which the opening 4 of the rotary transfer plate 8 passes through the stop position C and upstream and downstream thereof. As shown in FIGS. 8 and 9, the coil 23 is arranged as close as possible (for example, at a spacing of 1 to 2 mm) without coming into contact with the inner surface (top surface) 9b of the metal lid blank in order to improve heating efficiency. has been done. On the other hand, it is desirable that the upper surface 16a of the holding part and the upper surface 8b of the rotary transfer plate 8 be separated from the coil 23 to an extent that induction heating of the holding part 16 and the rotary transfer plate 8 can be avoided from the viewpoint of preventing induction heating loss. For the same reason, the rotary transfer plate 8 is preferably made of a non-magnetic material such as aluminum (alloy). Preferably, a circumferential groove is provided on the upper surface of the region 22 as necessary. The coil 23 is embedded in a core 39 made of a highly permeable material (for example, ferrite), and the core 39 is surrounded by an electrically insulating jacket 4.
Protected by 0. The cloak 40 is the base 13
It is supported by a support body 41 that is fixedly attached to. The coil 22 is also connected to a high frequency oscillator 42 . In low-speed production, that is, when the stop time of the metal lid blank 9 at stop position C is relatively long, the coil 23 may be provided only on stop position C, but in high-speed production (for example, several hundred pieces per minute).
In this case, the coil 23 needs to be installed upstream and/or downstream of the stop position C, as this may result in insufficient heating and incomplete thermal bonding of the peeled pieces. Therefore, it is necessary to extend to the next stop position D (in this case, the peeling piece pressing device 25, which will be described later, is provided downstream of the stop position D).

In this embodiment, the peeling piece pressing device 25 is provided at the lower part of the rotary transfer plate 8 in a region 22 between the stop positions C and D, and the peeling piece 5 is attached to the heated metal lid blank 9. inside its outer surface 9a
The opening 4 is covered and pressed. Figure 10, 1st
As shown in FIG. 1, the peeling piece pressing device 25 includes a pressing roll 43 having a plurality of (three in the figure) protrusions 43a and a fixed shaft 44, and the pressing roll 43 has a shaft 45. It is configured to perform intermittent rotational movement around a fixed shaft 44 via a drive device (not shown). Note that the circumferential speed near the opening 4 of the metal lid blank 9 when the peeling piece 5 is pressed and the surface 43 of the protrusion 43a of the pressing roll
It is necessary for the circumferential speeds of a' to be equal in order for the peeling piece 5 to be pressed smoothly, but since the metal lid blank 9 makes a circumferential movement, the left side of the opening 4 in FIG. The circumferential speed is slightly higher than that on the right side (because the rotation center axis is located on the right side of the figure). To compensate for this, the distance between the left end of the surface 43a' of the protrusion 43a and the central axis is slightly larger than that of the right end, so that the fixed shaft 44
It also slopes slightly down to the left. Projection surface 43
A' is opened with a vacuum suction hole 46 extending radially from the center hole 47 of the pressing roll 43, so that the peeling piece 5 can be attracted onto the surface 43a' by negative pressure. Vacuum suction is done through the center hole 47 and the guide hole 4.
8. This is carried out through the central hole 49 of the fixed shaft by a vacuum device (not shown). On the other hand, the center hole 47 is divided into two chambers by a partition wall 50, and as shown in FIG. 10, the chamber on the right side of the figure is under vacuum, while the chamber on the left side is under atmospheric pressure. Therefore, when the pressing roll 43 and the metal lid blank 9 move in the directions of the arrows, the pressed portion of the peeling piece 5 can be easily peeled off from the surface 43' of the protrusion.

Below the pressing roll 43, a peeling piece 5 is cut to a predetermined size from the web 51, and the protrusion surface 4 is cut from the web 51.
A cutting device 52 is provided for adsorption onto 3a'. The cutting device 52 includes a punch 53 and a die 5.
It is equipped with 4. A buffer body 55 made of elastic rubber or the like is buried inside the upper part of the punch 53. The cutting is performed while the web 51 and the pressing roll 43 are stopped, as shown in FIG. 12. The impact when the cut peeling piece 5 is attracted to the curved protrusion surface 43a' is alleviated by the buffer body 55. Note that the protrusion surface 43
A recess 43a'' for forming a knob 5a of the peeling piece is provided at one end of a'.

In FIG. 4, a high frequency induction heating coil 24 is provided at and near a stop position D downstream of the peeling piece pressing device 25. This is to increase and stabilize the thermal fusion strength of the pressed peel-off piece 5, but it is not necessarily provided if sufficient stable fusion strength can be obtained during pressing. The structure of the coil 24 and its auxiliary members is almost the same as that of the coil 23. Note that 56 is a high frequency oscillator, and 57 is a support.

At the stop position E, the area around the opening 4 and the peeling piece 5 are rapidly cooled as necessary. When the heat-sealing layer of the peelable piece 5 is made of a crystalline plastic film, this rapid cooling is particularly effective (compared to the case of standing to cool) for increasing the welding strength. In Fig. 13, 58 is the inner surface (top surface) of the metal lid blank.
This is a cooling body for cooling 9b, and a cooling hole 59 through which a cooling liquid (for example, -30° C. brine) flows is provided inside the lower end thereof. The cooling body 58 is the ram 33
It is capable of sliding against a spring 61 within a hole 60a provided at the lower end of a shank 60 fixedly attached to the shank 60. 62 is a pressure plate, its structure,
The operation is similar to that of the pressing plate 36 attached to the opening forming punch 30 shown in FIG. Reference numeral 63 is a cooling body for cooling the peeling piece 5 by directly contacting it, and is fixed to the base 13, and a cooling hole 64 through which a cooling liquid passes is provided inside the upper end of the cooling body. . As in the case of FIG. 7, as the ram 33 descends, the holding part 16 and the metal lid blank 9 also descend together with the cooling body 58, and as shown in FIG. On the other hand, the inner surface 9b near the opening 4 is pressed by the cooling body 5 under the elastic pressure of the spring 61, and rapid cooling is performed.

At the stop position F, the easily opened metal lid 1 formed as described above is attached to the rotary transfer plate when the ram 33 is lowered by the protruding rod 65 (FIG. 3) fixed to the ram 33. 8 onto the through-hole shelf 17a (see FIG. 6) of the rotary disk 10. When the pressing force of the protruding rod is applied to the upper surface of the metal lid 1, the holder 15 moves radially outward, and the engagement between the curled portion 2 of the metal lid and the claw portion 15a of the holder 15 is released. (See Figure 6).

The metal lid 1, which is easy to open, is manufactured using the above-mentioned apparatus in the following manner.

First, as shown in FIG.
The metal lid blank 9 with the curled portion 2 placed on the through-hole shelf portion 17a moves to the stop position A and stops as the rotary disk 10 rotates in the direction of the arrow. At this time, the through hole 8a of the rotary transfer plate 8 also moves to the stop position A, and the timing is such that it stops directly above the metal lid blank 9. Here plunger 2
9 is raised, the metal lid blank 9 is transferred to the rotary transfer plate 8, and is locked by the holder 15 (sixth
figure). Next, the rotary transfer plate 8 rotates in the direction of the arrow in FIG. 4, and the metal lid blank 9 stops at the stop position B. At the same time, the ram 33 descends, and the punch 30 and die 31 form the opening 4. Immediately, the ram 33 rises, the rotary transfer plate 8 rotates again, and the metal lid blank 9 in which the opening 4 is formed stops at the stop position C. Before and after that, the vicinity of the opening 4 of the metal lid blank 9 is rapidly raised to a predetermined temperature t ₁ (the peeling piece 5
are heated to a temperature sufficient for thermal fusion or thermal bonding (for example, 200°C) by pressing. The heating time is as short as 0.24 seconds (0.12 seconds while moving, 0.12 seconds while stopped) at a production rate of 250 pieces per minute, for example.

While the metal lid blank 9 heated to a predetermined temperature moves from the stop position C to the stop position D, the peeling piece 5 is applied to the outer surface 9a by the pressing device 2 while covering the opening 4.
5 (see FIGS. 10 to 12).
The metal lid blank 9 to which the peeling piece 5 has been pressed is heated to a predetermined temperature t ₂ (e.g., 220° C.) slightly higher than the predetermined temperature t ₁ by high-frequency induction heating at the next stop position D and before and after that, if necessary. It is reheated to enhance and stabilize the thermal bonding (fusion) strength. Furthermore, at the next stop position E, the peeling piece 5
The vicinity of the opening 4 is rapidly cooled as necessary to ensure the desired thermal bonding (fusion) strength. The metal lid 1, which is easy to open and manufactured as described above, is moved to the next stop position F when the ram 33 is lowered and the protruding rod 65 is opened.
After being transferred from the rotary transfer plate 8 to the rotary disk 10, the rotary disk 10 rotates to move to the stop position H, where it is sent to the next process.

Next, as shown in FIG. 2b, an embodiment of an apparatus for manufacturing an easy-to-open metal lid 1 in which a lining piece 6 other than the peel-off piece 5 is attached will be described.

Reference numeral 8' in FIG. 15 shows the rotary transfer disk of this embodiment (the rotary disk is omitted because its structure is the same as that in FIG. 4), and the parts with the same symbols as in FIG. 4 are the same parts. Or indicates parts with the same function. In this case, a high-frequency induction heating coil 70 for heating the vicinity of the opening 4 for pressing the lining piece 6 is provided at the next stop position L after the stop position B for forming the opening 4, and upstream and downstream thereof. point, stop position L
A pressing device 25 (see FIGS. 16 and 10) for the lining piece 6 is provided at the next stop position, and the peeling piece 5 and the lining are placed at the next stopping position N of the peeling piece pressing device 25. The structure is similar to that of the embodiment shown in FIG. 4 in which only the peeling piece 5 is pressed, except that a crimping device 82 (see FIG. 18) for the piece 6 is provided.

The high frequency induction heating coil 70 and its accessory members are:
In the case of high-frequency induction heating coil 23 (Figs. 8 and 9)
Since it is the same as in Figure), the explanation will be omitted. The lining piece pressing device 71 includes an upper mold 73 and a lower mold 74, as shown in FIG. A shank 75 for holding the upper die 73 is fixedly attached to a common ram 33 (see FIG. 3) with a shank 34 for holding the punch 30 for forming the opening 4. The lower edge 73a of the upper mold 73 cooperates with the die 76 to form a web 77 for the lining piece.
It is constructed so that it can be punched out. In addition, a heat-resistant elastic body (for example, silicone rubber) 78 is buried in the lower end of the upper mold 73 and slightly protrudes, and a vacuum suction hole 79 is opened in the lower end surface of the elastic body 78. The inner lining piece 6 is attracted and held by negative pressure. On the other hand, lower mold 7
4 is provided below the rotary transfer plate 8', and the base 1
It can be moved up and down by a lever (not shown) that operates in synchronization with the rotary transfer plate 8' in 3. It is becoming. A plurality of pores 80 communicating with the atmosphere are opened in the upper end surface 74a. A high-frequency induction coil 81 is provided near the periphery of the upper end of the lower mold 74 to prevent the vicinity of the opening 4 from being cooled when the upper end surface 74a comes into contact with the metal lid blank 9. It's summery.

Using this device, the lining piece 6 is pressed in the following manner. Immediately after the metal lid blank 9, whose vicinity of the opening 4 is heated to a temperature at which the lining piece 6 can be thermally bonded (fused), stops at the stop position M, the ram 33 descends, and at the same time, the lower die 74 begins to rise. As the ram 33 descends, the upper die 73 also descends,
The lining piece 6 is punched out from the stopped web 77 and is further lowered to bring the lining piece 6 into contact with the inner surface 9b of the metal lid blank 9. At the same time, the upper end surface 7 of the lower die 74
4a is in contact with outer surface 9a. Then, as shown in FIG. 17, the lining piece 6 is pressed by the elastic body 78, and its peripheral part is thermally bonded (melted) to the inner surface 9b around the opening 4, while its central part is inside the opening 4. It plunges in until the lower surface reaches the same plane as the outer surface 9a. The air within the opening 4 then escapes through the pores 80. The vacuum suction hole 79 is configured to communicate with the atmosphere at the same time that the upper mold 73 starts to rise, so the lining piece 6 is easily separated from the elastic body 78. Thereafter, the web 77 is pulled forward by one pitch by a drive mechanism (not shown).

At the stop position N, the peeling piece 5 is bonded to the lining piece 6 by thermocompression. This is because if the two are not sufficiently bonded (fused) together, peeling will occur at the interface between the two when the peeling piece 5 is peeled off, and the lining piece 6 will remain as it is, making it impossible to open the opening. As shown in FIG. 18, the crimping device 82 includes an elevating shaft 83 fixed to the ram 33 and a fixed shaft 84 fixed to the base 13.
It is equipped with The lower end of the lifting shaft 83 has a protruding peripheral bottom surface 83a and a recess 85.
A heat-resistant elastic body (for example, silicone rubber) 86 is buried above the opening 4 and the vicinity thereof.
The upper surface 84a of the fixed shaft 84 faces the lower surface of the elastic body 86, and a heater 87 is built in close to the upper surface 84a.

FIG. 18 shows a state in which thermocompression bonding is being performed, and as the ram 33 descends, the lifting shaft 8
3 also descends, and the holding part 16 touches the bottom surface 83 of the periphery of the elevating shaft.
The peeling piece 5 is pressed by the upper surface 8 of the fixed shaft.
It descends until it makes contact with 4a. In this state, the lining piece 6 and the peeling piece 5 are pressed together within the opening 4 and are simultaneously heated by the heater 87, so that they are thermally fused (bonded). When the elevating shaft 83 rises, the holding portion 16 returns to its original position via the bolt 27 due to the return force of the spring 28.

Metal lid 1 that is easy to open in the embodiment shown in FIG.
The production is carried out as follows.

A metal lid blank 9 is transferred from a rotary disk (not shown) to a rotary transfer plate 8' at a stop position A and is locked in a holder 15. The rotary transfer plate 8' rotates in the direction of the arrow, and at the next stop position B an opening 4 is formed in the metal lid blank 9. During the subsequent rotation period, during the stop at the stop position L, and during the subsequent rotation period, the vicinity of the opening 4 is heated to a predetermined temperature _t1 by the high frequency induction heating coil 70, and at the next stop position M, the opening 4 is heated. A lining piece 6 is pressed onto the inner surface to cover it. During the subsequent rotation period and during the stop at the stop position C, the vicinity of the opening 4 continues to be heated by the high frequency induction heating coil 23,
Peeling piece pressing device 25 during rotation at a predetermined temperature t ₂
As a result, at the next stopping position N, where the peeling piece 5 is pressed to the outer surface while covering the opening 4, the peeling piece 5 and the lining piece 6 located in the opening are bonded by thermocompression, and furthermore, at the next stopping position E, the peeling piece 5 is pressed to the outer surface. 5 and the lining piece 6 are rapidly cooled. The easy-to-open metal lid 1 manufactured as described above is transferred to a rotating disk (not shown) at the stop position F, and then sent to the next process.

The present invention is not limited to the above embodiments, and for example, the peeling piece 5 may be pressed while the metal lid blank 9 is stopped. That is, as shown in FIG. 19, a rotary transfer plate 8' housed in the base 13
A punch 88 is fixed to the upper part of a shank (not shown) that can be raised and lowered by a lever (not shown) that operates in synchronization with a lever (not shown), and a die 89 at a fixed position punches out the web 51 while it is stopped. may be pressed against the outer surface 9a near the opening 4 by the upper surface 89a of the punch. Furthermore, it may be an apparatus that transfers, presses, etc., with the outer surface 9a of the metal lid blank facing upward and the inner surface 9b facing downward. Alternatively, the device may be such that the peeling piece 5 is first pressed and then the lining piece 6 is pressed.

The present invention is constructed as described above in detail, and the metal lid blank is fixed to a rotary transfer plate that makes intermittent circumferential movements at predetermined timings, and the opening is formed while the metal lid blank is stopped or moving. The structure is configured so that the nearby high-frequency induction heating, the pressing of the peelable piece, and if a lining piece is provided, the pressing of the lining piece, and the thermocompression bonding of the peelable piece and the lining piece. The mechanism is such that it is held on a movable plate that moves in a circumferential direction and progresses sequentially from the first process to the last process, so once the metal lid blank is gripped, it is not released in the middle of the process and is fed sequentially to continue production. It is extremely easy to accurately position each step.

In this way, the metal lid blank is locked to the rotating transfer plate and the opening is formed while it is stopped.
The position of the opening on the rotary transfer plate is constant, and therefore it is easy to accurately position the peeling piece or lining piece when pressing it. and/or has the advantage that it is possible to securely attach the lining piece.

Also, during transport, the object to be adhered is first heated by a high-frequency induction heating coil, and then a peelable piece or lining piece with heat-sealable or heat-sensitive adhesive properties is pressed onto the sufficiently heated metal lid. Since the process and procedure described above are used to complete the adhesion, it has an excellent effect in that it is extremely compact and can be produced at high speed (for example, several hundred pieces per minute).

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an example of an easy-to-open metal lid manufactured by the manufacturing apparatus of the present invention, and FIGS. 2a and 2b are longitudinal sectional views taken along the line - in FIG. FIG. 3 is a front view of the first embodiment of the present invention; FIG. 3 is a front view of the first embodiment of the present invention;
Figure 4 is a schematic plan view taken from the - line in Figure 3;
FIG. 5 is an enlarged detailed plan view of the vicinity of the stop position A in FIG. 4, and FIG. 6 is a longitudinal cross-sectional view taken along the line - in FIG. Drawings for purposes of illustration, Figure 7 is the same as Figure 4.
FIGS. 8 and 9 are longitudinal sectional views taken along lines - and -, respectively, in FIG. A drawing for showing an induction heating coil; FIG. 10 is a longitudinal cross-sectional view taken along the - line in FIG. 4, and a drawing for showing a peeling piece pressing device;
Figure 11 is a longitudinal cross-sectional view taken along the line XI-XI in Figure 10;
FIG. 12 is a longitudinal cross-sectional view showing a state in which the peeling piece is adsorbed to the peeling piece pressing roll, and FIG. 13 is a longitudinal cross-sectional view taken along the - line in FIG. 4, showing that the attached peeling piece is rapidly cooled. Drawings to show the mechanism; FIG. 14 is a vertical cross-sectional view showing a state in which peeled pieces are rapidly cooled; FIG. 15 is a schematic plan view of a rotary transfer plate according to the second embodiment of the present invention; FIG. 15 is a longitudinal sectional view taken along the - line in FIG. 15, showing the lining piece pressing device; FIG. 17 is a longitudinal sectional view showing the state in which the lining piece is being pressed; and FIG. Figure -
FIG. 19 is a longitudinal cross-sectional view taken along a line showing a state in which the peelable piece and the lining piece are being bonded by thermocompression. FIG. 19 is a vertical cross-sectional view showing another example of the device for pressing the peelable piece. 1...Easy-to-open metal lid, 4...Opening, 5...
... Peeling piece, 6... Lining piece, 8... Rotating transfer plate,
9...Metal lid blank, 9a...Outer surface (to be the surface), 9b...Inner surface (to be the surface), 14...
Through hole, 15... Holder, 16... Holding part, 23...
... High frequency induction heating coil, 25 ... Peeling piece pressing device, 29 ... Plunger (device for locking the metal lid blank to the holder), 30 ... Punch,
31... Dice, 65... Protruding rod (device for separating the metal lid from the holder), 70... High frequency induction heating coil, 71... Lining piece pressing device, 82
...A device that heats and presses the lining piece and peeling piece together.

Claims (1)

[Claims] 1. An opening is formed in a metal lid blank, and a heat-fusible or heat-sensitive peelable piece is attached to a surface that covers the opening and becomes the outer surface of the metal lid blank. In an apparatus for manufacturing an easy-to-open metal lid,
A plurality of holding portions each having a through hole for accommodating the metal lid blank and a holder for the metal lid blank provided at the periphery of the through hole are provided along the circumferential direction, and are arranged intermittently at predetermined timings. It is equipped with a transfer plate for the metal lid blank that performs a circumferential movement,
A plurality of holding portion stopping positions are sequentially arranged along the transfer path of the metal lid blank, and a device for locking the metal lid blank to the holder is provided at the first stopping position of the holding portion. a second portion of the holding portion;
A device consisting of a punch and a die is provided in the stop position for forming the opening in the metal lid blank, and the holding part is moved to a third stop position or upstream and/or downstream thereof. A high frequency induction heating coil is provided along the path adjacent to the opening through which the peeling strip is placed on the outer surface of the metal lid blank at a fourth stop position of the holding part or along the transfer path. A peel-off piece pressing device is provided on the surface to cover and press the opening, and the metal plate with the peel-off piece attached is removed from the holder at a fifth stop position of the holder. 1. An easy-to-open metal lid manufacturing device, characterized in that it is equipped with a device that allows the lid to be opened easily. 2. An opening is formed in the metal lid blank, and a peelable piece and a lining piece that are heat-fusible or heat-sensitive adhesive are attached to the outer and inner surfaces of the metal lid blank, covering the opening, respectively. In the apparatus for manufacturing an easy-to-open metal lid, a plurality of holding parts each having a through hole for accommodating the metal lid blank and a holder for the metal lid blank provided at the periphery of the through hole are arranged in a circumferential direction. and is provided with a transfer plate for the metal lid blank that performs intermittent circumferential movement at predetermined timing, and is provided with a transfer plate for the metal lid blank that sequentially moves the plurality of holding parts to stop positions along the transfer path of the metal lid blank. is arranged at the first stop position of the holding part,
A device is provided for locking the metal lid blank to the holder, and a device comprising a punch and a die is provided in a second stop position of the holder for forming the opening in the metal lid blank, and A first high-frequency induction heating coil is provided at a third stop position of the holding part or along the transfer path upstream and/or downstream of said stop position and adjacent said opening through which said holding part A lining piece pressing device is provided at a fourth stop position for pressing the lining piece onto the surface that is to become the inner surface of the metal lid blank, covering the opening, and at a fifth stop position of the holding part. ,
and a second high-frequency induction heating coil is provided along the transfer path upstream and/or downstream of the fifth stop position in close proximity to the opening through which it passes, and in the sixth stop position of the holding part, Alternatively, a peel-off piece pressing device is provided along the transfer path to press the peel-off piece onto the surface that is to become the outer surface of the metal lid blank while covering the opening, and at the seventh stop position of the holding section. A device is provided for thermocompressing the pressed lining piece and the peeling piece to each other;
2. A metal manufacturing apparatus that is easy to open, characterized in that a device is provided at the stop position for removing the metal lid to which the lining piece and the peeling piece are attached from the holder. 3. An opening is formed in the metal lid blank, and a peelable piece and a lining piece that are heat-fusible or heat-sensitive adhesive are attached to the outer and inner surfaces of the metal lid blank, covering the opening, respectively. In the apparatus for manufacturing an easy-to-open metal lid, a plurality of holding parts each having a through hole for accommodating the metal lid blank and a holder for the metal lid blank provided at the periphery of the through hole are arranged in a circumferential direction. and is provided with a transfer plate for the metal lid blank that performs intermittent circumferential movement at predetermined timing, and sequentially moves the plurality of holding parts to stop positions along the transfer path of the metal lid blank. is arranged at the first stop position of the holding part,
A device is provided for locking the metal lid blank to the holder, and a device comprising a punch and a die is provided in a second stop position of the holder for forming the opening in the metal lid blank, and A first high-frequency induction heating coil is provided at a third stop position of the holding part or along the transfer path upstream and/or downstream of said stop position and adjacent said opening through which said holding part A peel-off piece pressing device is provided at the fourth stop position of the holding part for pressing the peel-off piece against the surface that is to become the outer surface of the metal lid blank, covering the opening surface, and at a fifth stop position of the holding part. , and a second high frequency induction heating coil is provided along the transfer path upstream and/or downstream of the fifth stop position, adjacent to the opening through which it passes, and at the sixth stop position of the holding part. or, a lining piece pressing device is provided along the transfer path to press the lining piece onto the surface that is to become the inner surface of the metal lid blank while covering the opening, and the lining piece is placed in a seventh stop position of the holding part. is provided with a device for thermocompressing the pressed lining piece and the peelable piece to each other, and furthermore, a metal lid to which the lining piece and the peelable piece are attached is provided at the eighth stop position of the holding part. An easy-to-open metal lid manufacturing apparatus, characterized in that a device for separating the lid from the holder is provided.