JP7394426B1 - laminating equipment - Google Patents

Abstract

The present invention provides a laminating device 100 that can provide a waterproof layer on the surface of a paper container. [Solution] A heating means 110 that heats a resin film S, a film holding means (holding means 130) that holds the resin film S, and a vacuum suction means that coats and molds the resin film S on the surface of a base material B. 140, the shutter device 120 is arranged between the heating means 110 and the resin film S held by the holding means 130, and is divided from the center and opened and closed as a heat shielding means. When the resin film S held by the holding means 130 is heated by the heating means 110, the shutter device 120 is controlled to be in the open state, and the resin film S is moved onto the surface of the base material B by the vacuum suction means. Alternatively, when the resin film S is fused to the surface of the base material B by air pressure means, the resin film S is controlled to be in a closed state. [Selection diagram] Figure 1

Description

The present invention relates to a laminating device that has the function of pasting a resin film onto the surface of a paper container or the like.

In light of the current situation, the use of paper containers is being reconsidered. However, when paper containers are used in place of conventionally used plastic containers, problems such as liquid leakage must be resolved. As part of measures to prevent liquid leakage, there are cases in which a paper container is laminated to prevent liquid leakage.

Patent Document 1 discloses a technology related to an insulating paper container and a raw material sheet used for the insulating paper container. A raw material sheet used for a heat-insulating paper container is a raw material sheet in which a thermoplastic resin layer is formed on at least one side of a paper base, and the paper base contains 0.3 g/m ² of hydroxycarboxylic acid or its metal salt. By using a raw material sheet containing 6.0 g/m ² or less, a paper container with excellent heat insulation properties can be provided.

Patent Document 2 discloses a technology related to waterproof paper and a method for manufacturing the same. A paper base material, an undercoat layer containing fine cellulose fibers with a fiber diameter of 60 μm or less provided on at least one side of the paper base material, and a styrene/acrylic resin and wax provided as the outermost layer on the undercoat layer. By having a waterproof layer containing the above, it is possible to manufacture paper that is both moisture-proof and waterproof.

Japanese Patent Application Publication No. 2009-83202 JP2023-59450A

However, the techniques described in Patent Document 1 and Patent Document 2 are both techniques for providing a waterproof layer on the surface of a planar paper base material, and the techniques described in Patent Document 1 and Patent Document 2 are techniques for providing a waterproof layer on the surface of a planar paper base material. It is difficult to provide a waterproof layer on the surface. Additionally, there is a demand for using paper folding boxes, but if a waterproof layer is provided on a flat paper base material and then the paper base material is folded three-dimensionally to form a paper folding box, leakage will occur from the gaps. This is a problem, and methods have been proposed to seal the area using adhesives or the like, but this is costly and difficult to completely prevent leakage.

In recent years, the demand for paper containers such as pulp molded products and paper folded boxes has been increasing, and in order to provide a waterproof layer to such products, technology has been developed to attach an adhesive layer to the back side of a laminated film. However, problems arise due to the provision of the adhesive layer. This is because, from the perspective of being environmentally friendly, it is desirable to make the laminate film as thin as possible, and it is also undesirable to include an adhesive layer because it would affect recycling and increase costs. For this reason, new waterproofing methods that can be used for paper containers are being sought.

Therefore, an object of the present invention is to provide a laminating device that can provide a waterproof layer on the surface of a paper container.

In order to achieve the above object, a laminating apparatus according to one aspect of the present invention has the following features.

(1) A laminating apparatus comprising a heating means for heating a resin film, a film holding means for holding the film, and a vacuum suction means or air pressure means for coating and molding the film on the surface of a base material,
The shutter device is arranged between the heating means and the film held by the film holding means and is divided from a central portion and is opened and closed as a heat shielding means,
The shutter device includes:
When the film held by the film holding means is heated by the heating means, the film is controlled to be in an open state,
When the film is brought into close contact with the surface of the base material by the vacuum suction means or the compressed air means and the film is fused to the surface of the base material, an open state or a closed state may be selected and controlled. ,
It is characterized by

According to the aspect described in (1) above, by using a shutter device that opens and closes in parts from the central portion in the laminating device, it is possible to quickly shut off the transfer of heat from the heating means to the film. Films are heated using, for example, hot plates or radiation heating means, but even with radiation heating means, which have a relatively fast temperature increase rate, the effect (heating) on the film after the heating is turned off is It will take some time for it to disappear.

However, by adopting a configuration that can block the transfer of heat from the heating means to the film using a shutter device, it becomes possible to quickly block the influence from the heating means. As a result, when coating the surface of a base material with a thin film, it is possible to suppress the occurrence of drawdown of the film due to overheating, so it is possible to suppress defects such as wrinkles. As a result, it leads to improved production efficiency and stable quality. Furthermore, if additional heating is desired for the purpose of increasing adhesion to a mold or base material, the film can be heated by opening the shutter device. At this time, since the heating can be switched by opening and closing the shutter device, the overheating state can be quickly reached, which can contribute to shortening the processing time.

(2) In the laminating apparatus described in (1),
The shutter device includes:
When heating the film, the heating means is controlled to be in an open state or a closed state until the temperature reaches a target temperature;
is preferred.

According to the aspect described in (2) above, since the shutter device is controlled to be closed until the heating means reaches the target temperature, it is possible to suppress overheating of the film. When controlling the temperature of the film, it is possible that the temperature rise time of the heating means has an adverse effect, so by opening and closing the shutter device, it is possible to adjust the temperature influence on the film. Moreover, it is also possible to heat the film by opening it as necessary. As a result, similar to the effect described in (1), the occurrence of drawdown of the film due to overheating can be suppressed. Furthermore, by applying the necessary heating, it is possible to improve the adhesion of the film to the mold or base material.

(3) In the laminating apparatus described in (1) or (2),
The shutter device has a telescopic structure and is in an open state so as to be divided into a front part and a rear part in the film feeding direction;
is preferred.

According to the aspect described in (3) above, it is possible to improve the fit of the shutter device. The shutter device has the effect of blocking heat so that the film is not excessively heated when the heating means heats the film. Therefore, when it is in the open state, it is desirable to make it as compact as possible so as not to block the space between the heating means and the film. Therefore, by adopting a telescopic structure for the shutter, the shutter device in the open state can be accommodated better, and this can contribute to miniaturization of the device.

(4) In the laminating apparatus according to any one of (1) to (3),
the base material is a pulp molded container or a paper folding box;
is preferred.

According to the aspect described in (4) above, it becomes possible to attach a waterproof resin film to the surface of a pulp molded container or a paper folding box. By making environmentally friendly paper containers waterproof, they can be easily used as food trays, for example.

FIG. 1 is an explanatory diagram of a schematic configuration of a laminating apparatus according to the present embodiment. It is a perspective view of the base material of this embodiment. It is a sectional view of a product of this embodiment. FIG. 2 is a plan view of the shutter device according to the present embodiment. It is a side view of the shutter device of this embodiment. FIG. 2 is an explanatory diagram of the operation of the shutter device according to the present embodiment, in which (A) shows the closed state of the shutter device, (B) shows the state in the middle of opening the shutter device, and (C) shows the open state of the shutter device. It is shown. It is a schematic diagram showing the lamination procedure of the present embodiment, in which (A) shows the overheated state of the resin film, (B) shows the closed state of the shutter device, and (C) shows the lamination process. This indicates the state in which the

First, an outline of the configuration of a laminating apparatus 100 according to an embodiment of the present invention will be explained. FIG. 1 is an explanatory diagram illustrating a schematic configuration of a laminating apparatus according to the present embodiment. The laminating apparatus 100 includes a heating means 110 for heating the resin film S, a lifting platform 150 for fixing the base material B and raising and lowering it, and a shutter device 120 disposed between the heating means 110 and the resin film S. It becomes more. This is a laminating apparatus 100 that holds a resin film S to be molded and heats it with a heating means 110 disposed above to attach the resin film S to the surface of a base material B.

The resin film S is a film used for lamination to impart a waterproof function to the base material B, and is made of a transparent polypropylene (PP) film material made of thermoplastic resin. Note that, according to the JIS standard, a film is defined as a plastic membrane with a thickness of less than 250 μm, but in this embodiment, a resin film S with a thickness of about 20 μm is used. is assumed. This resin film S only needs to be able to impart waterproofness by being attached to the surface of the base material B, and its thickness may be changed as necessary. Furthermore, the resin film S is not limited to a PP film, but it is preferably a thermoplastic resin that has good adhesion to paper containers and can provide waterproof function. .

FIG. 2 shows a perspective view of the base material. Figure 3 shows a cross-sectional view of the product. The base material B is a paper package such as a pulp molded container, and as shown in FIG. 2, a plurality of containers are arranged on a tile. Then, as shown in FIG. 3, a product 50 is obtained by attaching a resin film S to the surface of the base material B. The product 50 is a paper package to which a resin film S is attached to provide waterproof performance, and is, for example, a food container such as a curry container. However, the present invention is not limited to food containers in particular, and the present invention can be widely applied.

Such a base material B is held on a lifting platform 150 (not shown) equipped with a lifting mechanism capable of lifting and lowering the substrate to an arbitrary height. A resin film S held by a holding device 130 is placed on top of the base material B. The resin film S is unwound from the original film and held, and is fed from the left to the right in the plane of FIG. It does not prevent you from changing its configuration as necessary. For example, the resin film S may be cut into rectangular shapes, housed in a frame, and fed.

As shown in FIG. 1, the heating means 110 is a group of heaters 111 arranged above the resin film S to perform radiant heating used for heating the resin film S from above, and includes a plurality of heaters. 111 are arranged in a tile pattern. The heating means 110 is held by a lifting device (not shown), and is configured to be movable to any height so as to be able to approach and move away from the resin film S. Further, the output of each heater 111 can be adjusted arbitrarily.

A shutter device 120 is disposed below the heating means 110 and is provided for the purpose of physically shielding heat from the heating means 110 in a closed state. FIG. 4 shows a plan view of the shutter device. FIG. 5 shows a side view of the shutter device 120. The shutter device 120 is of a type that opens at the center and is divided into left and right sides, and has a first door 121 (121a, 121b) placed in the center and a second door 122 (122a, 122b) placed outside of the first door 121 (121a, 121b). It is equipped with The first door 121 and the second door 122 have a telescopic structure.

The shutter device 120 is provided in the laminating device 100 so that the opening/closing direction of the shutter device 120 matches the feeding direction of the resin film S. Therefore, when the shutter device 120 is in the open state, the first door 121a and the second door 122a are arranged to overlap on the front side in the traveling direction, as shown in FIG. 4, and the first door 121b and the second door 122b are It has a central drawing structure that is placed overlapping the rear side in the direction of travel. That is, when the shutter device 120 is in the open state, the shutter device 120 does not prevent the heating means 110 from heating the resin film S.

Note that the opening/closing direction of the shutter device 120 may be arranged so as to match the direction perpendicular to the feeding direction of the resin film S, but this requires the width of the laminating device 100. This causes the casing to become larger. Therefore, it is preferable to make appropriate decisions when designing.

The rodless cylinder 131 is arranged in two rows parallel to the feeding direction of the resin film S, and is provided with a slide table 132 that can be moved arbitrarily in the longitudinal direction of the rodless cylinder 131. The first door 121 is fixed to the top surface of this slide table 132. The rodless cylinder 131 is driven by being supplied with compressed air (not shown), and has a function of moving the slide table 132 from the forward end to the backward end. Note that the rodless cylinder 131 may be driven by a mechanism that opens and closes by incorporating an electric motor without relying on compressed air.

On the other hand, one end of the second door 122 is supported by a roller slide rail 140. Although not shown, the other end on the opposite side is guided by a roller. The roller slide rail 140 includes a rail 141 and a slider 142, and the second door 122 is opened and closed by a roller 143 held by the slider 142 moving within the rail 141. Two sliders 142 are prepared and fixed to the side surface of the second door 122.

FIG. 6 shows an explanatory diagram of the operation of the shutter device. (A) shows that the shutter device is in the closed state, (B) shows that the shutter device is driven and the first door overlaps the second door, and (C) shows that the shutter device is in the closed state. indicates that the shutter device is in the open state. A rodless cylinder 131 is used to open and close the shutter device 120, and in the closed state shown in FIGS. 4 and 6(A), a slide table 132 is provided at the forward end of the rodless cylinder 131.

Then, when the slide table 132 is moved and comes to the center, as shown in FIG. The second door 122b moves by coming into contact with the inner wall of the second door 122b. Then, as shown in FIG. 6C, when the slide table 132 is moved to the rearward end of the slide table 132, the first door 121b and the second door 122b are overlapped. Although the structure of the shutter device 120 is not limited to this, it is desirable to have a structure that opens left and right from the center of the device, and it is more desirable to adopt a telescopic structure.

The outline of the configuration of the laminating apparatus 100 according to the present invention is as described above, and next, the procedure for manufacturing the product 50 using the laminating apparatus 100 will be briefly explained.

FIG. 7 schematically illustrates the lamination procedure. (A) shows the overheated state of the resin film, (B) shows the closed state of the shutter device, and (C) shows the state in which lamination molding is being performed. First, as shown in FIG. 7(A), the base material B is placed on the lifting table 150 of the laminating apparatus 100. Then, the resin film S is held by the holding device 130, and the resin film S is heated by the heating means 110 while the shutter device 120 is kept open.

Next, as shown in FIG. 7(B), when the heated resin film S reaches a predetermined temperature, the shutter device 120 is closed, and the temperature between the heating means 110 and the resin film S is closed. Physically interrupts heat transfer. Then, the base material B is brought close to the resin film S. At this time, by equipping the heating means 110 with a lifting mechanism (not shown) and raising it, it is possible to maintain a physical distance from the resin film S and the shutter device 120, thereby reducing the thermal influence on the resin film S. .

Next, as shown in FIG. 7C, lamination is performed in such a way that the resin film S is adsorbed onto the surface of the base material B by drawing air from the underside of the base material B using the vacuum suction means 140. . As a result, as shown in FIG. 2, the resin film S is fused onto the base material B, and the product 50 is obtained by cutting it out individually.

Since the laminating apparatus 100 of this embodiment has the above-mentioned configuration, it has the following functions and effects.

First, an advantage is that it is possible to provide a laminating apparatus 100 that can provide a waterproof layer on the surface of a paper container. This includes a heating means 110 that heats the resin film S, a film holding means (holding means 130) that holds the resin film S, and a vacuum suction means 140 that coats and molds the resin film S on the surface of the base material B. The laminating apparatus 100 includes a shutter device 120 that is divided from the center and opens and closes as a heat shielding means, which is disposed between the heating means 110 and the resin film S held by the holding means 130. , the shutter device 120 is controlled to be in an open state when the resin film S held by the holding means 130 is heated by the heating means 110, and the shutter device 120 is controlled to be in an open state, and the resin film S is placed on the surface of the base material B by a vacuum suction means or This is because when the resin film S is fused to the surface of the base material B by air pressure means, the resin film S is controlled to be in a closed state.

As shown in the problem, when providing a waterproof layer on the surface of a paper container (base material B), it is desirable to avoid providing an adhesive layer as much as possible, and it is preferable that the resin film S functioning as a waterproof layer is thin. Therefore, the resin film S can be fused to the surface of the base material B by appropriately heating it with the heating means 110 and molding it on the surface of the base material B using the vacuum suction means 140 at an appropriate timing. It becomes possible. Here, the control of the heating of the resin film S by the heating means 110 becomes more severe as the thickness of the resin film S becomes thinner. Drawdown occurs due to overheating, which tends to lead to wrinkles, gaps, and defects in the product 50.

Therefore, by providing the shutter device 120 as a heat shielding means, the heating from the heating means 110 to the resin film S is cut off. In other words, the shutter device 120 opens the first door 121 (121a, 121b) left and right from the center and the second door 122 (122a, 122b) arranged on the outside as shown in FIGS. In the open state, heating from the heating means 110 to the resin film S is not cut off, and in the closed state, heating to the resin film S can be cut off. Since the rodless cylinder 131 is used to open and close the shutter device 120, the shutter device 120 can be opened and closed in one second or less.

In this way, by quickly shutting off the heating with the shutter device 120, it is possible to cut off the electricity to the heating means 110 as in the past, to move the heating means 110 away from the resin film S, or to forcibly shut off the heating means 110 using compressed air. It becomes possible to block the thermal influence from the heating means 110 in a shorter time than when using means such as cooling. The shutter device 120 has a structure that is opened and closed using a rodless cylinder 131, and can be opened and closed in a short time. Therefore, in order to prevent overheating of the resin film S by the heating means 110, the shutter device 120 can be quickly closed, leading to suppression of overheating.

Therefore, it becomes easier to control the heating time for the resin film S, and even when a thin resin film S is used, it is possible to suppress the influence of drawdown and the occurrence of pinholes. When welding the resin film S to the base material B, it is preferable to use a thin resin film S in order to reduce weight and cost. Further, by reducing the amount of resin film S used in the product 50, it is possible to promote environmental friendliness.

In addition, the method of laminating by heating and welding the resin film S to the base material B eliminates the need to provide an adhesive on the back side of the resin film S, which leads to cost reduction. As a result, it can contribute to the productivity of the product 50.

In addition, when heating and welding the resin film S to the base material B, it is possible to increase the adhesion of the resin film S to the base material B by opening the shutter device 120 again and heating it. Therefore, it is possible to control not only the closed state but also the open state. In this case, a procedure can be considered in which after heating the resin film S, the resin film S is once closed, and when the resin film S comes into contact with the base material B, it is heated again to improve the adhesion.

Although the laminating apparatus 100 according to the present invention has been described above, the present invention is not limited thereto, and various changes can be made without departing from the spirit thereof. For example, although a PP film is used as the resin film S, a resin material having waterproof performance may be used instead. Further, although the base material B is a pulp molded container, this does not preclude application to paper folding boxes. Since a waterproof layer made of resin film S can be provided on the inside of the paper folded box, it is possible to prevent water from seeping through the folded portion. Further, although it has been explained that the vacuum suction means 140 is used during lamination molding, the use of pressure forming means is not prohibited.

Further, regarding the timing of use of the shutter device 120, an example is shown in which the shutter device 120 is used when the heating of the resin film S by the heating means 110 ends, but this does not preclude the use of the shutter device 120 when the heating starts. The heating time of the resin film S can be controlled by keeping the shutter device 120 in a closed state when the heating means 110 starts heating, and opening it immediately before or at the stage when the heating means 110 starts up. becomes possible. It is considered that using a hot plate as the heating means 110 functions effectively when heating time is required.

S Resin film B Base material 100 Laminating device 110 Heating means 120 Shutter device 130 Holding means 140 Vacuum suction means

Claims (4)

A laminating apparatus comprising a heating means for heating a resin film, a film holding means for holding the film, and a vacuum suction means or a compressed air means for coating and molding the film on the surface of a base material,
The shutter device is arranged between the heating means and the film held by the film holding means and is divided from a central portion and is opened and closed as a heat shielding means,
The shutter device includes:
When the film held by the film holding means is heated by the heating means, the film is controlled to be in an open state,
When the film is brought into close contact with the surface of the base material by the vacuum suction means or the compressed air means and the film is fused to the surface of the base material, the open state or the closed state is selected and controlled. thing,
A laminating device featuring: The laminating apparatus according to claim 1,
The shutter device includes:
When heating the film, the heating means is controlled by selecting the open state or the closed state until the temperature reaches a target temperature;
A laminating device featuring: The laminating apparatus according to claim 1,
The shutter device has a telescopic structure and is opened so as to be divided into front and rear parts in the film feeding direction;
A laminating device featuring: The laminating apparatus according to claim 1 or 2,
the base material is a pulp molded container or a paper folding box;
A laminating device featuring:

Images