KR100964724B1 - Method for attaching sponge on pouch - Google Patents

Abstract

PURPOSE: A sponge sticking method for a pouch is provided to attach a light sponge to pouch wings by using a quick process. CONSTITUTION: A sponge sticking method for a pouch is as follows. Both wings coated to the hot melt adhesive advances in a vertical direction. A side bonding part of pouch is gripped with a holder(17) of a conveyor(16). A pouch stands up right and moves. Hot air blows between both sides vertical wing of a pouch through a high temperature nozzle(27). The bottom of both wings are folded and deregulated by press pincers(33).

Description

How to attach sponge for pouch {METHOD FOR ATTACHING SPONGE ON POUCH}

The present invention relates to a sponge attaching method for pouches, and more particularly, to a sponge attaching method for pouches that can quickly produce a sponge adsorption pouch used in a disposable cosmetic container and the like in an accurate shape.

As shown in FIG. 3A, the synthetic resin pouch used as a disposable cosmetic packaging container or the like has a weakly bonded portion 9 that is easily ruptured and opened when the pouch contents are squeezed at its inlet. The normal junction 7 formed along the pouch edge is strongly bonded, but the weak junction 9 of the pouch is formed such that only the adhesive force is maintained so as not to be opened by accidental compression during handling. When the contents of the pouch are thin liquid cosmetics with high fluidity, when the pouch contents are pressed with a finger or the like to open the weakened portion 9, the contents are ejected rapidly while bursting the weakened portion 9, and easily splashed around. Even if it does not bounce, processing after squeezing with a finger or the like is very difficult. Therefore, in recent years, wings are formed on both sides of the pouch 9 at the entrance of the pouch so as to extend in a direction perpendicular to the pouch body, and a sponge is attached to the surface of the pouch to absorb the contents ejected when the plunge 9 is opened. Sponge adsorption pouches have been developed (see Korean Patent Publication No. 10-2006-3076). The sponge adsorption pouch presses the pouch contents such as cosmetics so that the medicine bonding portion 9 is opened, and the contents such as cosmetics are soaked into the sponge immediately after discharging through the opened medicine bonding portion 9. At this time, since the cosmetics soaked in the sponge are not only uniformly distributed but also easy to apply to the skin, the sponge adsorption pouch is particularly preferred for the disposable packaging of the thin liquid cosmetics.

However, attaching the sponge to the wings of the pouch is not an easy task. Since pouches and sponges are not only very small in size, but also lightweight and difficult to handle, they not only significantly reduce productivity by hand, but also make it difficult to obtain a uniformly shaped sponge adsorption pouch.

The present invention has been made to solve the problem of attaching the sponge for the pouch described above, the first problem to be solved by the present invention is to provide a sponge attaching method for the pouch that can be attached to the pouch wings in a rapid process. .

The second problem to be solved by the present invention is to provide a sponge attachment method for the pouch to obtain a sponge adsorption pouch having a uniform shape.

In the above-described problem of the present invention, in attaching a sponge to a pouch, both wings coated with a hot melt adhesive on an inner surface thereof are formed by extending a packaging film on the upper part of the pouch sealed with the weak joint part of the upper part edge and the top joint part of the other edge part. Pouch vertical double-wing forming step of forming a pair to proceed in the vertical direction; A pouch standing conveying step of holding the pouch side of the pouch on which the vertical two wings are formed by a holder fixed to the conveyor to convey the pouch in a vertically standing state; A two-blade spreading step of blowing the hot air by hot air nozzles between the vertical two wings of the pouches that are standing up and conveyed by the difference of the amount of thermal expansion of the inner and outer surfaces of the packaging film; A double-wing horizontal forming step of folding the bottom of both wings with a crimping force for more than 90 ° and then releasing them, thereby restoring the bottom of both wings to a horizontal state by elastic restoring force; A hot melt adhesive heating step of heating the hot melt adhesive while supporting a point to which a sponge is attached to both wings lower surfaces horizontally formed by a heat jig; A sponge supplying step of transferring a sponge to the horizontally formed two wings; And a sponge attaching step of attaching the sponge to the hot melt adhesive coating surface of both wings by adsorbing the sponge in a vacuum.

According to the present invention having the above-described configuration, not only can a light sponge be attached to the pouch vane in a rapid process, but also there is an effect of obtaining a sponge adsorption pouch having a uniform shape at all times.

Hereinafter, a preferred embodiment of the sponge attaching method for the pouch according to the present invention will be described in detail with reference to the drawings.

1 is a process chart showing a sponge attaching method for the pouch according to the present invention, Figure 2 is a configuration diagram for an embodiment of a sponge attaching device for implementing a sponge attaching method for the pouch according to the present invention, Figure 3a 3 is a perspective view illustrating a pouch state before a sponge is attached by the sponge attaching device for a pouch according to the present invention, and FIG. 3B is a cross-sectional view taken along the line A-A 'of FIG. 3A.

As shown in FIG. 1, the present invention includes a pouch vertical double wing forming step 100 for forming a vertical double wing coated with a hot melt adhesive on an inner surface of a pouch. The pouch vertical double wing forming step is performed together with the pouch body molding in the pouch forming machine.

In the pouch vertical double wing forming step 100 of the present invention, as shown in Figure 3a and 3b, a pair of wings (3a, 3b) continuous to the pouch body on the upper portion of the weak junction 9 of the pouch (1) Is formed in the vertical direction. When forming the pouch 1 containing the contents while proceeding by overlapping two sheets of synthetic resin packaging film in a pouch forming machine, first, the parts to be the lower and side edges of the pouch are thermally compressed at a normal pressure and temperature to be joined normally. And the contents 11 are introduced between the packaging films by the nozzles. To this end, as shown in Figure 3b, the inner surface of the packaging film is coated with a hot melt adhesive (5). Then, leaving a portion to form a weak junction on the upper edge, and the remaining edges are again thermally compressed to form the normal joint 7 entirely, and the weak joint 9 is formed after the normal joint 7 upper part It is formed by thermocompression bonding at a lower temperature and pressure than the normal junction 7 in the middle of the edge. The pouch 1 in which the junctions 7 and 9 are formed is generally cut along the outer boundary of the junctions 7 and 9, wherein the vertical two-blade forming step 100 according to the invention differs in this cutting process. That is, a portion of the packaging film that is not bonded to the outside of the upper edge junction in the forming process of the joints 7 and 9 is left, and this is cut out in the shape of the wings 3a and 3b in the cutting process. By doing so, the packaging film may be extended to the upper portion of the pouch 1 so that the two wings 3a and 3b coated with the hot melt adhesive 5 on the inner surface thereof may be formed in pairs to proceed in the vertical direction.

As shown in FIG. 1, the present invention includes a stand up pouch transfer step 101 for vertically holding and pouching a pouch with a holder provided on a conveyor. Referring to FIG. 2, the pouch standing conveying step includes a conveyor 16 cyclically moving a predetermined trajectory, a conveying block 18 arranged and fixed to the conveyor 16 at fixed intervals, and the conveying block 18. It can be seen that it is made by a pouch transfer part 15 composed of a holder 17 provided in the holder to hold the side tangent contact portion 7 of the pouch 1, the vertical wings (3a, 3b) is formed in the vertical direction. The transfer block 18 is disposed at regular intervals, and the conveyor 16 stops temporarily (for each process progress time) after the progress of the transfer interval unit of the transfer block 18, and then proceeds again. As shown in FIG. 2, above the point at which the transfer block 18 is stopped, the pouch input unit 19, the pouch detection unit 21, the pouch double wing opening 25, and the pouch double wing horizontal molding The part 31, the sponge attachment part 35, the sponge press part 41, and the pouch taking-out part 47 are provided sequentially along the conveyor conveyance direction.

When the holder 17, which does not hold the pouch 1, stops at the point of the pouch inlet 19, the pouch inlet 19 stands up one by one and puts the pouch into the holder 17, and the holder 17 Keeps the pouch standing up during transport.

As shown in FIG. 1, the present invention includes a two-blade spreading step 102 in which hot air is blown between two vertical wings to open both wings. This step is to open the vertical both wings due to the difference in the amount of thermal expansion between the synthetic resin packaging film and the hot melt adhesive on the inner and outer surfaces of the vertical both wings. In the two-blade spreading step 102, hot air is blown by the hot-air nozzles 27 between the vertical two-blades 3a and 3b of the pouch 1 that is standing up and conveyed. Then, as shown in Figure 3b, since the inner surface of the synthetic resin packaging film is coated with a hot melt adhesive (5), both wings are opened by the difference in the amount of thermal expansion of the inner and outer surfaces of both wings (3a, 3b). As is known, the softening temperature or the expansion start temperature of the synthetic resin film (about 110 ℃ in the case of commonly used PE) and the softening temperature or the expansion start temperature of the hot melt adhesive (hot melt adhesive based on ethylene vinyl acetate copolymer) In the case of about 60 ° C), a person skilled in the art can heat hot air at an appropriate temperature (60 ° C or more and 110 ° C or less in the above example) for an appropriate time (for example, 2-3 seconds) according to the type of the resin film and the hot melt adhesive. ), When applied at an appropriate speed (eg 1-2 m / s), both wings will open. In FIG. 2, the double wing opening step is performed in the pouch double wing opening 25, and for this purpose, the pouch double wing opening 25 includes a hot air nozzle 27. In addition, the pouch double wing opening portion 25 is further provided with a pusher 29 that can press the inner surface of the wings 3a, 3b to be opened from the top downward when blowing the hot air to the hot air nozzle 27. Can be. The pusher 29 is preferably configured to be able to move up and down. 4A is a perspective view illustrating a state in which both wings are opened by applying hot air between the two wings in a vertical state in the pouch double wing opening part, and FIG. 4B is a cross-sectional view taken along the line B-B ′ of FIG. 4A.

As shown in Figure 1, the present invention is horizontally formed so that the hot melt adhesive coating surface of the two wings (3a, 3b) upwards by releasing the pouch both wings (3a, 3b) the lower end by forcing more than 90 ° It includes both wings horizontal molding step (103). In the two-wing horizontal forming step 103, the lower ends of the two wings are forcibly folded over by 90 ° with the crimping forceps 33, and then released, so that the lower ends of the two wings are folded and restored to the horizontal state by the elastic restoring force of the synthetic resin packaging film. . If the bottom of both wings is released without grounding by more than 90 °, the two wings 3a and 3b are never extended in the horizontal direction. In Figure 2, the two-blade horizontal molding step is carried out in the pouch double-wing horizontal molding portion 31, for this purpose, the pouch both-wing horizontal molding portion 31 is provided with a crimping forceps 27, or similar folding means Equipped. The crimping tongs 27 and the folding means is preferably configured to be able to move up and down. In addition, it is preferable that the crimping forceps 27 and the crimping plate of the folding means press the pouch wings 3a and 3b while advancing in the front-back direction. Figure 5a is a perspective view showing a state in the pouch double wing horizontal molding forcibly folded the bottom of both wings with a crimping forceps 33, Figure 5b is a pouch both wings horizontally by the restoring force after releasing the crimping forceps 33 in 5a It is a perspective view showing the state.

As shown in Figure 1, the present invention includes a hot melt adhesive heating step 104 for supporting the lower wing of both wings by a heat jig. The hot melt adhesive heating step 104 supports the point to which the sponge is attached to the lower surface of the two wings 3a and 3b horizontally formed by the heat jig 13 while melting the hot melt adhesive (depending on the type of the hot melt adhesive, but not ethylene vinyl acetate). In the case of hot melt adhesive having a copolymer as a base polymer, the temperature is heated to about 120 ° C.). In FIG. 2, the hot melt adhesive heating step 104 is performed by a heat jig 45 which is heated by electrothermal and can be advanced or retracted directly below the pouch wings 3a and 3b. As shown in FIG. 2, the hot melt adhesive heating step 104 by the heat jig is performed when the pouch holder 17 reaches the lower portion of the sponge attachment part 35. Although FIG. 2 exemplarily shows a case in which one thermal jig 45 is used for one pouch, one thermal jig 45 is disposed at the front and rear of each pouch, and both wings of the thermal jig are disposed. (3a, 3b) It is preferable that the supporting portion is formed in a semicircular shape so that the supporting portions are advanced forward and downward from the front and rear of the pouch both wings 3a and 3b when supporting the pouch both wings 3a and 3b. The hot melt adhesive coated on the upper surfaces of the pouch wings 3a and 3b spread out horizontally is heated and melted by the heat transfer of the heat jig 13 to form a sponge. The heating time by the heat jig 13 can be selected by the person skilled in the art according to the coating thickness of the hot melt adhesive, but usually 2 seconds to 4 seconds is sufficient.

As shown in FIG. 1, the present invention includes a sponge supplying step 105 for feeding and supplying a sponge 13 to the horizontally formed double wings 3a and 3b. In FIG. 2, the sponge supply unit 39 performing the sponge supply step 105 may be formed in various structures. It is preferable that the sponge supply part 39 is comprised so that the sponge 13 may be conveyed to the upper part of the pouch blades 3a and 3b.

As shown in FIG. 1, the present invention includes a sponge attaching step 106 for holding the supplied sponge 13 and attaching it to the upper surfaces of the pouch wings 3a and 3b. The sponge attaching step 106 is a step of attaching the sponge to the hot melt adhesive 5 coated surface of both wings 3a and 3b by sucking the sponge 13 in a vacuum. In FIG. 2, the sponge attaching step 106 is performed by a sponge attaching portion 35 having an adsorption head 37 capable of adsorbing the sponge 13 in a vacuum. The suction head 37 is configured to be lifted up and down by a cylinder. The suction head 37 is connected to a vacuum pump for vacuum adsorption. In addition, the lower surface of the suction head 37 may be further provided with a small needle that can be fixed by fixing the sponge (13). 6A is a perspective view illustrating a method of depositing a sponge above the hot melt adhesive coating surface of both pouch blades, and FIG. 6B is a perspective view illustrating a state in which a sponge is attached to both pouch wings.

As shown in FIG. 1, the present invention supports the hot melt adhesive at the hot melt melting temperature while supporting the point where the sponge is attached to the lower wing of the two wings horizontally formed by the same heat jig 45 as described above after the sponge attaching step. It may further include a hot melt adhesive heating step 107 to continue heating, and a sponge pressing step 108 for pressing the upper surface of the sponge 13 in the direction of both wings by the punch 43. In FIG. 2, the sponge pressing step 108 is performed by the sponge pressing part 41 provided with a punch 43 that is lifted and lowered by a cylinder.

When the sponge is attached to the pouch in this manner, as shown in FIG. 2, after the sponge crimping portion 41, when the holder 17 proceeds in the vertical direction, the pouch ejecting portion 47 is removed from the holder 17. Remove the pouch. To this end, the pouch taking-out part 47 is provided with a drawer tong 49 having a tong plate disposed in the vertical direction and opening and closing in the front-rear direction. The pouch taking-out part 47 proceeds forward with the tongs open when the pouch is taken out, and then holds the body of the pouch while closing the tongs, and retracts the tongs to close the pouch (1) from the holder (17). To separate.

All operations described above should be performed only in a state in which the pouch is standing up and inserted into the holder 17 normally. When there is no input of the pouch 1 or no standing of the pouch 1, the process of the above processes should be stopped. In order to ensure this, before the two-blade spreading step 102, a pouch for detecting whether the pouch is held upright in the holder 17 and stopping the operation of the conveyor 16 in the absence of the standing up pouch. It is preferable to further include a sensing step (110). In FIG. 2, the pouch detection step 110 is performed by the pouch detection unit 21, and the pouch detection unit 21 includes an infrared sensor to detect the pouch.

By the above-described method, the present invention not only makes it possible to attach a light sponge to the pouch vane in a rapid process, but also to obtain a sponge adsorption pouch having a uniform shape at all times.

1 is a process chart showing a sponge attachment method for a pouch according to the present invention.

Figure 2 is a block diagram of an embodiment of a sponge attachment device for a pouch implementing the sponge attachment method for a pouch according to the present invention.

Figure 3a is a perspective view showing a state of the pouch before the sponge is attached by the sponge attachment device for pouch according to the present invention.

3B is a cross-sectional view taken along the line A-A 'of FIG. 3A.

4A is a perspective view showing a state in which both wings are opened by applying hot air between the two wings in a vertical state in the pouch double wing opening part.

4B is a cross-sectional view taken along the line BB ′ of FIG. 4A.

Figure 5a is a perspective view showing a state in which the pouch both wings horizontally forcibly folded the bottom of both wings with a crimping forceps.

Figure 5b is a perspective view showing that the pouch both wings are in a horizontal state by the restoring force after releasing the crimping tong in 5a.

6A is a perspective view showing a method of depositing a sponge above the hot melt adhesive coating surface of both pouch blades.

6B is a perspective view showing a state in which a sponge is attached to both pouch wings.

               Explanation of symbols on the main parts of the drawings

1: pouch 3a, 3b: wing

5: hot melt adhesive 7: normal bonding

9: weak junction 11: contents

13: sponge 15: pouch transfer unit

16: conveyor 17: pouch holder

18: transfer block 19: pouch input unit

21: pouch detection unit 23: infrared sensor

25: pouch double wing opening 27: hot air nozzle

29: pusher 31: pouch double wing horizontal molding

33: crimping forceps 35: sponge attachment portion

37: adsorption head 39: sponge supply unit

41: sponge crimping portion 43: punch

45: heat jig 47: pouch ejecting unit

49: withdrawal tongs

Claims (3)

Pouch vertical double wings formed by extending the synthetic resin packaging film on the upper part of the pouch sealed with the weak joint of the upper part of the edge and the normal joint of the other edge to advance the vertical direction by pairing both wings coated with a hot melt adhesive on the inner surface Molding step; A pouch standing conveying step of holding the pouch side of the pouch on which the vertical two wings are formed by a holder fixed to the conveyor to convey the pouch in a vertically standing state; Hot air is blown by hot air nozzles between the vertical wings of the pouches that are standing up and transported, and the vertical wings are opened by the difference in thermal expansion between the synthetic resin wrapping film and the hot melt adhesive on the inner and outer surfaces of the vertical wings. Opening step; A double-wing horizontal forming step of folding the bottom of both wings with a crimping force for more than 90 ° and then releasing them, thereby restoring the bottom of both wings to a horizontal state by elastic restoring force; A hot melt adhesive heating step of heating the hot melt adhesive to a hot melt adhesive melting temperature while supporting a point to which a sponge will be attached among the two wing surfaces horizontally formed by a heat jig; A sponge supplying step of transferring a sponge to the horizontally formed two wings; And A sponge attaching method for a pouch comprising a; sponge attached by adsorbing the sponge in a vacuum to attach the sponge to the hot melt adhesive coating surface of the two wings. The method of claim 1, After the sponge attaching step, A hot melt adhesive heating step of continuously heating the hot melt adhesive to a hot melt adhesive melting temperature while supporting a point to which a sponge will be attached among the two wing surfaces horizontally formed by a heat jig; And Sponge pressing step of pressing the sponge upper surface in the direction of the two wings by a punch; further comprising a sponge for pouch. The method of claim 1, Before the double wing spreading step, And a pouch detection step of detecting whether the pouch is held upright in the holder of the conveyor and stopping the operation of the conveyor when there is no standing pouch.

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