JPH0761444A - Easy opening method for fixing resin chips to the can lid - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a method for fixing a resin chip to a Stein tab type easy opening can lid while eliminating waste of resin material and simplifying the apparatus and man-hours. [Structure] A predetermined amount of molten resin is discharged into a central hole portion 26 of the lifting ring portion 22 of the tab 2 at the first stop position with respect to the easy-open can lid A in which the tab 2 is intermittently conveyed in a fixed direction. Then, the molten resin 27 'is placed on the upper surface of the lid plate, and then the upper surface of the resin 27' placed at the second stop working position is pressed to easily open the lid plate upper surface of the can lid A and the inner circumference of the lifting ring portion 22. Resin 27 'is pressed into a gap between the lower side of the curl portion 25 and molded into a chip shape, and the molded resin chip 27 is formed.
Is fixed by solidifying so as not to drop from the lifting ring portion 22 of the tab 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin chip fixing method for an easy opening can lid in which a resin chip is applied to a stain tab type easy opening can lid for the purpose of a product campaign or a prize exchange or prize exchange.

[0002]

2. Description of the Related Art Conventionally, as a method for fixing a resin chip (token) to a Stein tab type easy opening can lid,
For example, those described in US Pat. No. 3,958,354 (conventional example 1) and JP-A-5-147648 (conventional example 2) are known.

In the above-mentioned conventional example 1, for the purpose of surely and easily attaching / detaching a token for gift exchange, for example, to the tab,
It shows a method in which a token that matches the shape of the ring portion of the tab is formed in advance, and this token is inserted into and engaged with the ring portion of the tab.

In the above-mentioned conventional example 2, for example, a token for redeeming a prize can be surely and easily attached to and removed from the tab.
This is a method in which a token member formed in a band shape is punched out in conformity with the shape of the ring portion of the tab, this token is inserted into the ring portion of the tab, and then the curl portion is crushed to crimp the rib of the token.

[0005]

However, in each of the above-mentioned conventional examples, since it is necessary to independently mold the tokens in advance, a token molding device is required.

Further, in Conventional Example 1, a method is adopted in which molded tokens are fitted one by one to the ring portion of the tab, and the tabs fitted with the tokens are caulked to the can lid to form an easily opened can lid. However, in Conventional Example 2, one token is punched out from the strip-shaped token member, inserted into the ring portion of the tab, the curl portion is crushed, and the rib of the token is caulked to form an easily opened can lid. Therefore, it takes a lot of man-hours to fit the token into the tab. Further, in Conventional Example 2, since the token is punched out from the strip-shaped token member, scrap is generated and the material is wasted.

The present invention has been made in view of the above problems, and an object of the present invention is to eliminate the waste of resin material and to simplify the apparatus and man-hours while facilitating the opening of a steion tab type. It is to provide a method of fixing a resin chip to a can lid.

[0008]

In order to achieve the above object, in the method of fixing resin chips to the easy-open can lid of the present invention, a score line having a discontinuous portion is engraved to break a part of the lid plate. Part is formed, and a tab composed of a pressing portion at the front end, a lifting ring portion at the rear end, and an intermediate mounting portion is fixedly provided on the lid plate, and the breakage portion and the tab are not separated from the lid plate even after opening. Easy-to-open type of can lids are conveyed one by one in the horizontal direction with the outer surface facing upward, and are continuously conveyed intermittently, with the tabs oriented in the same direction so that the tabs are in a fixed direction. And a can lid conveying step of conveying the resin to the central portion of the lifting ring portion of the tab at the first stop position, and a molten resin discharging step of depositing the molten resin on the upper surface of the lid plate by a predetermined amount, and a second subsequent step. The top surface of the resin placed at the stop work position Easy to open, the resin chip molding process of pressing resin into the gap between the top surface of the lid of the can lid and the lower side of the curl on the inner circumference of the lifting ring, and the molded resin chip is the tab lifting ring. And a resin chip solidifying step of solidifying by cooling so as not to drop off from the portion.

In the resin chip molding process,
The upper surface of the resin may be pressed by using a pressing punch having a pattern or symbol on the lower surface, and the upper surface of the resin chip fixed to the can lid may be stamped.

[0010]

[Function] Even when the resin chip is fixed to the Steion type easy-to-open can lid where the breaks and tabs are not separated from the lid plate even after opening, the easy-to-open can lids are placed one by one in the horizontal direction with the outer surface facing up. When the tabs are continuously conveyed intermittently and are conveyed to the first work stop position by aligning the directions so that the tabs are oriented in a certain direction (can lid transfer step), the tabs are moved at the first stop position. A predetermined amount of molten resin is discharged to the central portion of the lifting ring portion, the molten resin is piled up on the upper surface of the lid plate (molten resin discharging step), and then conveyed from the first work stop position to the second work stop position. Then, the upper surface of the resin piled up at the second stop work position is pressed, and the resin is pushed into a gap between the upper surface of the lid plate of the easy-open can lid and the lower side of the curl portion on the inner circumference of the lifting ring portion to form a chip shape. Molded into Process). Then, the resin chip is cooled and solidified by blowing cold air or natural cooling so that the molded resin chip does not fall off the lifting ring portion of the tab (resin chip solidifying step).

Therefore, since the resin chip is not preliminarily molded, the resin chip molding device is not required, and the device can be simplified.

Further, since a predetermined amount of the molten resin is discharged to the central portion of the lifting ring portion of the tab and the upper surface of the heaped resin is pressed, a complicated operation is not required and a short time is required. A resin chip can be fixed to the tab.

Further, the molten resin to be the resin chips has a discharge amount of all chips, and there is no generation of scrap as in the case where the resin chips are punched out from the belt-shaped member in advance,
There is no waste of resin material.

In addition, the method of the present invention can be applied by directly using the easy-opening can lid forming apparatus in which the easy-opening can lids are continuously conveyed in the horizontal direction one by one with the outer surface facing upward. In this case, it is possible to greatly simplify the device and the number of steps for fixing the chip.

In the resin chip molding step of this resin chip fixing method, when the upper surface of the resin is pressed by using a pressing punch having a pattern or symbol on its lower surface, the resin is fixed to the can lid. Since the upper surface of the resin chip is marked, it is possible to meet the request for marking the resin chip without increasing the number of steps. Further, by cooling the pressing punch used in this step, the time required for cooling and solidifying the resin chips can be shortened.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

First, the structure of the easy-open can lid to which the resin chip fixing method of the embodiment of the present invention is applied will be described with reference to the plan view of FIG.

In FIG. 2, the easy-open can lid A is composed of a lid plate 1 that is wound around an upper opening of a can body (not shown) and a tab 2 that is fixed to the lid plate 1.

On the cover plate 1, a breaking portion 11 surrounded by a score line 10 having a discontinuous portion 15 having a starting end and a terminating end spaced apart from each other, and a beat 12 for reinforcing the breaking portion 11.
And a fixing rivet portion 13 formed at a substantially central position of the lid plate 1 for fixing the tab 2 and a finger insertion concave portion 14 formed at a position opposite to the breaking portion 11 with the fixing rivet 13 interposed therebetween. ing. The score line 10 is
It is a double score line consisting of an inner score line and an outer score line, of which the outer score line is deeply engraved,
This part is broken at the time of opening.

The tab 2 is formed from a single aluminum alloy plate, has an outer peripheral curl portion 20 on the outer periphery, and has a pressing portion 21 at the front end, a lifting ring portion 22 at the rear end, and an intermediate mounting portion. In the state where the pressing portion 21 is placed on the breaking portion 11 and most of the lifting ring portion 22 is placed on the lid plate 1 on the outer side of the breaking portion, the lid plate 1 is attached to the attaching portion 23. It is fixed to the fixed rivet portion 13. It should be noted that, in the attachment portion 23, a C-shaped cut line 2 that is arranged near the pressing portion 21 of the tab 2 and close to the outer score line 10 of the breaking portion 11 and has the pressing portion 21 side open.
Surrounded by 4. Further, the lifting ring portion 22 is provided with a central hole portion 26 surrounded by a curled inner peripheral curl portion 25, and a resin chip 27 is fitted into the central hole portion 26 by a resin chip fixing method described later. It is worn.

Next, the resin chip fixing method of the embodiment of the present invention will be described with reference to FIG.

This resin chip fixing method comprises a can lid carrying step, a molten resin discharging step, a resin chip molding step and a resin chip solidifying step.

In the can lid transfer step, the opening easy can lid A is
In this step, the outer surfaces of the tabs 2 are sequentially and continuously conveyed in an intermittent manner in the horizontal direction, and the tabs 2 are conveyed to the first work stop position with their orientations aligned so that they are oriented in a fixed direction.

In the molten resin discharging step, a predetermined amount of the molten resin is discharged into the central hole portion 26 of the lifting ring portion 22 of the tab 2 at the first stop position by a hot melt applicator or a resin extruder (not shown). , As shown in Fig. 1 (a),
In this step, the molten resin 27 'is placed on the upper surface of the cover plate 1.

The resin used here is polyethylene, polypropylene, ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, polyamide, styrene / isobutylene / styrene block polymer, styrene / butadiene / styrene block copolymer, Based on styrene / ethylene / styrene block copolymers and urethane-based thermoplastic resins, tackifiers such as rosin-based resins, terpene-based resins, petroleum resins, alkylphenol resins, xylene resins, coumarone-indene resins, paraffin wax, micro A hot melt material composed of wax such as christan wax and polyethylene wax is used.

In the resin chip molding step, the resin 2 placed at the second stop work position subsequent to the first work stop position is used.
As shown in Fig. 1 (b), the upper surface of 7'is patterned on the lower surface 28
By pressing using a pressing punch 28 in which a is engraved, the resin 27 'is pressed into the gap between the upper surface of the lid plate of the can lid A for easy opening and the lower side of the inner curl portion 25 of the lifting ring portion 22 to form a chip shape. It is a process to do.

As shown in FIG. 1C, the resin chip solidifying step is a step of cooling and solidifying the molded resin chip 27 so as not to fall off from the lifting ring portion 22 of the tab 2, and the upper surface of the can lid 1 or Appropriate means such as a method of blowing cold air on at least one of the lower surfaces, a method of bringing a cooled pump into contact with the resin chip, and a method of natural cooling can be adopted.
As a result, a marking 27a is formed on the upper surface of the resin chip 27 fixed to the can lid 1.

Next, a resin chip fixing device of an embodiment in which the resin chip fixing method is incorporated in a can lid molding device and adopted will be described with reference to FIGS.

FIG. 3 is a plan view of the can lid molding and resin chip fixing device, and FIG. 4 (a) is a BB line of FIG. 3 showing the can lid stacking portion.
Fig. 4 (b) is a partial perspective view showing the transfer bar of the can lid, Fig. 5 (a) is a side view of the device showing the die set open state, and Fig. 5 (b) is the operation of the can cover with the transfer bar. FIG. 5C is a side view of the apparatus showing the position transfer state, and FIG. 5C is a side view of the apparatus showing the die set shut state after transferring the working position.

In the figure, 30 is a can lid stacking portion, 31
Is a bottom plate, 32 is a post, 33 is a knife, 34 is a vacuum suction pipe, 35 is a transfer bar, 36 is a fixed upper die, 37 is a lower die that reciprocates up and down, 38 is an upper die, 3
Reference numeral 9 is a lower die, 40 is a resin discharge nozzle, and 28 is a pressing punch.

As shown in FIG. 4A, the knife 33 is fixed to the upper side of the first pocket 35a of the transfer bar 35, and is the lowest one stacked every time the transfer bar 35 reciprocates back and forth. The can lid and the second can lid are separated from each other by a curling section, and the lowest can lid is fitted into the pocket 35a of the transfer bar 35 by the suction pipe 34 provided below,
Hold the can lid above the second can lid (Jitsuko Sho 57-39).
359).

As shown in FIG. 4 (b), the transfer bar 35 is formed with a pocket 35a which is a half-moon shaped notch for holding the curl portion of the can lid.
A small claw 35b having a spring is incorporated therein.

The forward and backward reciprocation of the transfer bar 35 is such that the driven roll attached to the transfer bar 35 is in contact with the corrugated rib of the cylindrical cam, and the cylinder bar makes one reciprocation back and forth by one rotation (Actual Publication No. 59-). 8877).

[When Can Lid Molding and Resin Chip Fixing] At the time of can lid molding and resin chip fixing, as shown in FIG.
With the die set open, as shown in Figure 5 (b),
The can lid is housed in the pocket 35a of the transfer bar 35 and the process advances by one step. Then, while the transfer bar 35 is in the forward position, the lower die 37 rises, the can lid is pushed up by the lower mold 39, and is removed from the pocket 35a of the transfer bar 35. After the can lid is removed from the transfer bar 35, as shown in FIG. 5C, the transfer bar 35 starts to retreat, the lower die 37 descends, and the can lid on the lower die 39 again moves to the transfer bar. By the time it touches 35, the transfer bar 35 returns to the retracted position, and the can lid is moved to the transfer bar 35.
It is stored in the next pocket 35a. In this way, intermittent feed for each work position is achieved.

At each work position, as shown in FIG. 3, first, as a can lid forming step, a step of confirming the presence or absence of a can lid blank, a rivet 1st forming step, a rivet 2nd forming and an emboss forming. Process and rivet 3r
d molding process, score molding and beat inside beat molding process, panel molding, bead molding, bubble molding process, tab temporary caulking process, tab final caulking and lettering marking process, and resin chip fixing process As the above, a molten resin discharging step and a resin pressing step are performed.

[Fixing of Resin Chips] Since the resin chip fixing method of the embodiment is carried out in the can lid molding apparatus, one opening easy can lid A is continuously intermittently made horizontally with the outer surface facing upward. The can lid transporting step of transporting the tabs 2 to the first work stop position by aligning the orientations so that the tabs 2 are oriented in a fixed direction is accomplished by intermittent transport of the can lid molding apparatus itself.

Then, at the first stop position, a predetermined amount of the molten resin is discharged into the central hole portion 26 of the lifting ring portion 22 of the tab 2, and the molten resin 27 'is placed on the upper surface of the cover plate 1 in the molten resin discharging step. It is achieved only by adding the resin discharge nozzle 40 of the hot melt applicator to the fixed upper die 36.

The upper surface of the resin 27 ', which is placed at the subsequent second stop working position, is pressed by using a pressing punch 28 having a pattern 28a engraved on the lower surface, and the upper surface of the cover plate of the can lid A for easy opening and the lifting ring. In the resin chip molding step of molding the resin 27 ′ into a chip shape by pushing the resin 27 ′ into the gap between the lower side of the inner peripheral curl portion 25 of the portion 22, the pressing punch 28 is applied to the fixed upper die 36.
It is achieved simply by adding.

Further, the molded resin chip 27 is attached to the tab 2
The resin chip solidifying step of cooling and solidifying so as not to drop from the lifting ring portion 22 is achieved by natural cooling by leaving the opening easy can lid A on which the resin chip molding is completed.

In this way, the resin chip 27 having the marking 27a on its upper surface is fixed to the can lid 1.

[Removing Operation of Resin Chip] Before the opening of the can having the opening easy can lid A, the resin chip 27 is in the state shown in FIG. 1C, and the resin chip 27 has the upper surface of the lid plate and the lifting ring. Since the chip lower surface diameter is larger than the chip upper surface diameter in a portion surrounded by the lower side of the inner peripheral curl portion 25 of the portion 22, even if an external force is applied during transportation, the upper surface of the portion 22 is also touched by a finger or the like. The resin chip 27 will not fall off even if some external force is applied.

When eating or drinking the contents of the can, when the consumer puts his / her finger under the lifting ring portion 22 of the tab 2 and raises the rear end, the pressing portion 21 of the tab 2 is used as a fulcrum.
The score line between the pressing portion 21 of the tab 2 and the mounting portion 23 is first broken by the lever action with the vicinity of the mounting portion 23 as the point of action. After that, the remaining score line 10 is broken by the lever action with the pressing part 21 as the fulcrum and the pressing part 21 as the action point, and the pressing force from the pressing part 21 continues to act on the breaking part 11. , The broken line 11 is the score line 10
The discontinuous portion 15 of the above is used as a hinge portion and remains hanging from the lid plate 1 into the can.

By this opening operation, the lifting ring portion 22 of the tab 2 is pushed up. Therefore, the resin chip 2
When 7 is fitted in the central hole portion 26 of the lifting ring portion 22, the resin chip 27 can be removed from the back side by pushing the resin chip 27 from the front side of the central hole portion 26 with a finger,
Further, when the resin chip 27 is adhered to the upper surface of the lid plate 1, it can be removed by peeling the resin chip 27 from the upper surface of the lid plate 1.

Next, the effect will be described.

(1) Since the resin chip 27 is not preliminarily molded, a resin chip molding device is not required and the device can be simplified.

(2) Since the molten resin 27 'is discharged in a predetermined amount into the central hole portion 26 of the lifting ring portion 22 of the tab 2 and the upper surface of the resin 27' is simply pressed, it is complicated. The resin chip 27 can be fixed to the tab 2 in a short time without requiring an operation.

(3) The molten resin to be the resin chips 27 is entirely discharged as chips, and scrap is not generated as in the case where the resin chips are punched out from the band-shaped member in advance, and the resin material is not wasted.

(4) Since the easy-open can lid forming method in which the easy-open can lids A are individually conveyed continuously intermittently in the horizontal direction with the outer surface facing upward, the resin chip fixing method is applied. Therefore, it is possible to greatly simplify the device and the number of steps for fixing the chip by using the existing equipment.

(5) In the resin chip molding step of the method of fixing the resin chip 27, the upper surface of the resin 27 'is pressed by using the pressing punch 28 having the pattern 28a engraved on the lower surface thereof. Since the engraved mark 27a is formed on the upper surface of the resin chip 27 to be fixed, it is possible to meet the engraving request of the resin chip 27 without increasing the number of steps.

Although the embodiments have been described above with reference to the drawings, the specific configuration is not limited to the embodiments, and modifications and additions within the scope of the present invention are included in the present invention. Be done.

For example, in the embodiment, the upper surface of the resin chip is engraved by the pressing punch, but the engraving may be omitted. In addition, the resin chip fixing method of the present invention can be easily opened with the can lid A of 1. An example was shown of application to an easy-open can lid forming device that is conveyed continuously intermittently in the horizontal direction one by one with the outer surface facing up, but it is installed at a location apart from the easy-open can lid forming device. The method of the present invention is carried out by supplying the manufactured easy-open opening can lid to the independent resin chip fixing dedicated device, discharging the resin and molding while intermittently conveying the tabs in the same direction. Is also good.

The mark applied to the resin chip is not limited to the mark due to the unevenness at the time of molding, and the unevenness may be used in combination with coloring with ink or paint, or the ink jet printer may use ink to print letters, numbers, figures and combinations thereof. May be used to draw a code on the surface of the resin chip, or the marking may be performed only by coloring with ink or paint or by coloring with a coloring agent mixed in the resin.

[0053]

As described above, according to the present invention, a resin chip for application to a prize or a gift exchange for the purpose of a product campaign is put on a canister tab type easy-to-open can with a fixed tab orientation. In the first stop position, a predetermined amount of molten resin is discharged to the central portion of the lifting ring of the tab, and the molten resin is deposited on the upper surface of the lid plate, and then the second At the stop work position, the upper surface of the resin was pressed, and the resin was pushed into the gap between the upper surface of the lid plate of the can lid and the lower side of the curl portion of the inner surface of the lifting ring to mold it into a chip shape. Since the resin chip is fixed by being solidified so as not to fall off the lifting ring portion of the tab, it is possible to eliminate waste of the resin material and to simplify the apparatus and the number of steps. Cormorants effect can be obtained.

[Brief description of drawings]

FIG. 1 is a process explanatory view showing a molten resin discharging step, a resin chip molding step, and a resin chip solidifying step of a method of fixing a resin chip to a can lid with an easy opening in an embodiment.

FIG. 2 is a plan view showing an easy-open can lid to which a resin chip is fixed by the resin chip fixing method of the embodiment.

FIG. 3 is a plan view showing an easy opening can lid forming device to which the method of the embodiment is applied.

4 (a) is a BB line in FIG. 3 showing a can lid stacking portion.
FIG. 4B is a partial perspective view showing the transfer bar of the can lid.

5 (a) is a side view of the device showing a die set open state, FIG. 5 (b) is a side view of the device showing a transfer position of a can lid by a transfer bar, and FIG. 5 (c) is a working position. FIG. 3 is a side view of the apparatus showing a die set shut state after transferring the sheet.

[Explanation of symbols]

 A Easy can lid 1 Lid plate 10 Score line 11 Breaking portion 15 Discontinuous portion 2 Tab 21 Holding portion 22 Lifting ring portion 23 Mounting portion 25 Inner curl portion 26 Center hole portion 27 Resin chip

[Procedure amendment]

[Submission date] August 27, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

The resin used here is polyethylene, polypropylene, ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, polyamide, polyester, styrene / isobutylene / styrene block polymer, styrene / butadiene / styrene block. Based on thermoplastic resins such as copolymers, styrene / ethylene / butylene / styrene block copolymers and urethane resins, tackifiers such as rosin resins, terpene resins, petroleum resins, alkylphenol resins, xylene resins, coumarone indene resins, Hot melt materials composed of waxes such as paraffin wax, microcristan wax, polyethylene wax, etc.
Suitable, but thermoplastic resin alone, adhesive with thermoplastic resin
A combination of a wax with an imparting agent or a thermoplastic resin is also acceptable.
Yes. It should be noted that these resins are mixed with pigments or dyes
can do.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

As shown in FIG. 1C, the resin chip solidifying step is a step of cooling and solidifying the molded resin chip 27 so as not to fall off from the lifting ring portion 22 of the tab 2, and the upper surface of the can lid 1 or how blowing cold air to at least one of the lower surface, the cooled Pont Ji method of contacting the resin chip, it can be adopted as appropriate means such as a method for natural cooling.
As a result, a marking 27a is formed on the upper surface of the resin chip 27 fixed to the can lid 1.

Claims (2)

[Claims] 1. A tab formed by engraving a score line having a discontinuous portion to form a breaking portion in a part of a cover plate, and comprising a holding portion at a front end, a lifting ring portion at a rear end, and an intermediate mounting portion. A method of fixing a resin chip in the lifting ring part of the lid of the easy opening can lid of a type in which the breaking portion and the tab are not separated from the lid plate even after opening. Can lid transport that transports lids one by one with the outer surface facing up in the horizontal direction intermittently and continuously, and aligns the tabs so that the tabs are in a fixed direction to the first work stop position. Process, first molten metal resin is discharged to the center of the lifting ring of the tab at the first stop position and the molten resin is discharged to the upper surface of the cover plate, and then the second stop operation position is added. The top surface of the resin Easy Resin chip molding process in which resin is pressed into the gap between the upper surface of the lid plate of the can lid and the lower side of the curl on the inner circumference of the lifting ring, and the molded resin chip does not fall off the lifting ring of the tab. A method of fixing a resin chip to an easy-to-open can lid, comprising: a resin chip solidifying step of cooling and solidifying as described above. 2. The method for fixing resin chips to an easily opened can lid according to claim 1, wherein in the resin chip molding step, an upper surface of the resin is pressed by using a pressing punch having a pattern, a symbol or the like on the lower surface. A method for fixing a resin chip to an easily-opened can lid, characterized by engraving an upper surface of a resin chip fixed to the can lid.