JP2022001418A - Apparatus and method for manufacturing laminated container - Google Patents

Abstract

To make it possible to easily separate and dispose of at a time of disposal while preventing a paper container and a resin layer from being separated unexpectedly during use, in a laminated container with the resin layer formed inside the paper container.SOLUTION: A manufacturing apparatus for a laminated container in which a resin layer made of a resin different from a resin coating is formed inside a paper container 101 coated with the resin in advance includes: an upper mold 40 that holds the paper container with an air passage hole in a posture that opens downward; a vacuum drawing device 4c that introduces vacuum to an inner surface of the upper mold 40; and a compressed air introduction device 4d that introduces compressed air into a lower mold 41 when the upper mold 40 and the lower mold 41 are closed. A heated and softened resin sheet S is formed by adhering it to an inner surface of the paper container 101 by vacuum and compressed air.SELECTED DRAWING: Figure 6

Description

The present invention relates to a manufacturing apparatus and a manufacturing method for a laminated container in which a resin layer is formed on the inner surface of a paper container and integrated.

Conventionally, as a cup-shaped container, a laminated container in which a resin layer is formed inside a paper container to improve water resistance has been known (see, for example, Patent Document 1). In Patent Document 1, a resin layer is formed inside a paper container by stretch blow molding. That is, while heating the preform made of thermoplastic resin, a paper container is set in a stretch blow mold, and the preform arranged in this paper container is stretch blow molded in the paper container to form a paper container. By making it adhere to the inner surface, the resin layer can be integrated with the paper container.

Japanese Unexamined Patent Publication No. 2009-208402

By the way, in the case of a laminated container consisting of a paper container and a resin layer, the outside is paper and the inside is resin, which are made of different materials. Therefore, it is necessary to remove the resin layer from the paper container and dispose of it separately at the time of disposal. There is.

However, since the purpose of Patent Document 1 is to increase the adhesion strength between the paper container and the resin layer and firmly integrate them, the separate disposal of the paper container and the resin layer is not considered. Therefore, it is conceivable that the user cannot easily separate and dispose of the waste.

The present invention has been made in view of this point, and an object thereof is to unexpectedly separate a paper container and a resin layer at the time of use in a laminated container in which a resin layer is formed inside a paper container. The purpose is to make it easy to dispose of separately at the time of disposal while preventing it from happening.

In order to achieve the above object, in the present invention, a resin sheet that has been sufficiently softened by heating is formed in close contact with the inner surface of a paper container by vacuum and pneumatic molding.

The first invention is to provide a resin sheet to be the resin layer in a laminated container manufacturing apparatus in which a resin layer made of a resin different from the resin coating layer is formed inside a paper container having the resin coating layer. A sheet heating part that is heated and softened, and a recess that is arranged on the resin sheet heated by the sheet heating part and holds the paper container in which an air passage hole is formed in an open position downward. An upper mold to have, a vacuum drawing device connected to a suction hole formed on the inner surface of the concave portion of the upper mold, and a lower mold arranged under the resin sheet heated by the sheet heating unit. A mold drive device that drives at least one of the upper mold and the lower mold in a direction in which they are brought into contact with each other and a compressed air introduction device that introduces compressed air into the lower mold when the mold is closed. It is characterized by having.

According to this configuration, by keeping the upper mold and the lower mold open, it is possible to hold the paper container having the resin coating layer in the concave portion of the upper mold. On the other hand, the resin sheet made of a resin different from the resin coating layer is heated by the sheet heating portion to be sufficiently softened, and is arranged under the paper container, that is, facing the open portion of the paper container. When the upper mold and the lower mold are closed in this state and a negative pressure is applied to the suction holes by the vacuum pulling device, an air passage hole is formed in the paper container, so that the inside of the paper container becomes negative pressure. The softened resin sheet is formed in close contact with the inner surface of the paper container. At this time, since the compressed air is introduced into the lower mold by the compressed air introduction device, the resin sheet is pressed against the inner surface of the paper container by the compressed air. That is, by vacuum- and pressure-molding the resin sheet, the resin sheet is brought into close contact with the inner surface of the paper container with a strong force, and a resin layer is formed inside the paper container. The strong adhesion of the resin sheet to the paper container during molding makes it difficult for the resin layer to come off the paper container during use. On the other hand, since the resin layer and the resin coating layer of the paper container are different resins, the adhesive strength is not so high, and it is possible to easily separate them at the time of disposal.

The second invention is characterized in that the lower mold has a plug inserted into the recess of the upper mold.

According to this configuration, the plug can be inserted into the recess of the upper mold with the upper mold and the lower mold closed. This makes it easier to positively push up the resin sheet toward the inside of the paper container and bring it into close contact with the inner surface of the paper container.

A third aspect of the invention comprises a plug drive device for switching between a molding position in which the plug protrudes from the upper surface of the lower mold and a storage position housed in the lower mold, wherein the plug drive device holds the plug. It is characterized in that it is configured to be in the molding position when the resin sheet is molded, while it is in the accommodating position after molding.

According to this configuration, the plug is projected only when the resin sheet is molded and can be stored in the lower mold after molding, so that the plug does not get in the way after molding.

A fourth aspect of the invention is characterized in that the sheet feeding section for feeding the resin sheet is provided, and the sheet heating section is disposed away from the upper mold on the upstream side in the feeding direction of the resin sheet. ..

According to this configuration, since the sheet heating portion is separated from the upper mold, the resin coating layer of the paper container held in the recess of the upper mold can be prevented from melting due to the heat of the sheet heating portion. .. As a result, the resin constituting the resin coating layer of the paper container and the resin constituting the resin layer do not mix with each other, so that the adhesive strength between the paper container and the resin layer may be increased more than necessary. It is possible to improve the sorting workability at the time of disposal.

A fifth invention is a method for manufacturing a laminated container in which a resin layer made of a resin different from the resin coating layer is formed inside a paper container having a resin coating layer, wherein the resin sheet serving as the resin layer is provided. A sheet heating step of heating and softening, and a holding step of holding the paper container having an air passage hole formed in a concave portion of an upper mold arranged on the resin sheet in an open position downward. After the sheet heating step and the holding step, the upper mold and the lower mold arranged below the upper mold are closed, a negative pressure is applied to the inner surface of the concave portion of the upper mold, and the lower mold is applied. It is characterized by comprising a molding step of introducing compressed air into the container to bring the resin sheet into close contact with the inner surface of the paper container.

According to the present invention, when a resin layer is formed inside a paper container having a resin coating layer by a resin sheet made of a resin different from the resin coating layer, the resin sheet softened by heating is vacuumed and It can be integrated into a paper container by pneumatic molding. As a result, it is possible to easily separate and dispose of the paper container and the resin layer at the time of disposal while preventing the paper container and the resin layer from being separated unexpectedly at the time of use.

It is a side view of the manufacturing apparatus of the laminated container which concerns on embodiment of this invention. It is a vertical sectional view of a laminated container. It is a vertical sectional view of a paper container. It is a perspective view which shows the state which a plurality of laminated containers are connected. It is a side view of the mold drive device, the upper mold and the lower mold, and shows the state which the mold is closed. It is a figure corresponding to FIG. 4 which shows the state which the mold is opened. It is sectional drawing of the upper mold and the lower mold, and shows the state which the mold is open. FIG. 6 is a diagram corresponding to FIG. 6 according to a modified example of the embodiment. It is a partial cross-sectional view of a feeder. It is a figure corresponding to FIG. 6 which shows the state which the mold is closed. FIG. 6 is a view corresponding to FIG. 6 showing a state in which the plug is in the molding position. FIG. 6 is a view corresponding to FIG. 6 showing a state in which a resin sheet is pneumatically brought into close contact with the inner surface of a paper container. FIG. 6 is a view corresponding to FIG. 6 showing a state in which the mold is opened after molding of the laminated container. FIG. 6 is a view corresponding to FIG. 6 showing a state in which a laminated container is placed on a container mounting member. FIG. 6 is a view corresponding to FIG. 6 showing a state in which the container mounting member on which the laminated container is mounted is switched to the upper position. FIG. 6 is a view corresponding to FIG. 6 showing a state in which a laminated container mounted on a container mounting member is sucked and conveyed by a suction portion.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its application or its use.

FIG. 1 is a side view of the laminated container manufacturing apparatus 1 according to the embodiment of the present invention. The manufacturing apparatus 1 is an apparatus for manufacturing a laminated container 100 as shown in FIGS. 2A and 2B. In the description of this embodiment, before explaining the manufacturing apparatus 1, the structure of the laminated container 100 will be described with reference to FIGS. 2A and 2B. The laminated container 100 is composed of a paper container 101 and a resin layer 102. The laminated container 100 may be a container containing a liquid such as a cup or a container containing various foods and the like, and the shape thereof is not particularly limited. The laminated container 100 may be a bowl, a box, or the like in addition to the cup.

The size of the laminated container 100 is not particularly limited, but may be, for example, a depth of about 5 cm to 15 cm and a diameter of about 5 cm to 10 cm, and the resin layer 102 of the laminated container 100 having such a depth is a resin. It can be obtained by drawing and deep drawing the resin sheet S (shown by a virtual line in FIG. 1) which is the material of the layer 102. The resin sheet S may be any sheet that has been conventionally used for drawing, and for example, a sheet made of polypropylene or the like, a sheet in which a plurality of types of resins are laminated, or the like can be used. Such a resin sheet S has a length of several tens of meters or more, and can be supplied to the manufacturing apparatus 1 in a coiled state.

As shown in FIG. 2B, the paper container 101 is a cup-shaped container opened upward, and has a bottom wall portion 101a and a peripheral wall portion 101b. An air passage hole 101c is formed in the bottom wall portion 101a. The number of air passage holes 101c may be one or a plurality, and the air passage holes 101a penetrate the bottom wall portion 101a in the vertical direction. The inside of the paper container 101 communicates with the outside through the air passage item 101c. The air passage hole 101c may be a so-called pinhole-like hole formed by, for example, passing a thin needle through the bottom wall portion 101a, or a part of the bottom wall portion 101a may be punched out by a punch or the like. It may be a formed hole. By forming it with a needle, the air passage hole 101c becomes inconspicuous, which is preferable. Further, the air passage hole 101c may be provided only in the peripheral portion of the bottom wall portion 101a, may be provided only in the central portion of the bottom wall portion 101a, or may be provided in the entire bottom wall portion 101a. The peripheral edge portion of the bottom wall portion 101a is a portion that is connected to the peripheral wall portion 101b and is bent downward.

The peripheral wall portion 101b is formed so as to increase in diameter toward the upper end. The lower end of the peripheral wall portion 101b is a portion that is connected to the bottom wall portion 101a, and is bent upward so as to sandwich the peripheral edge portion of the bottom wall portion 101a. The peripheral edge portion of the bottom wall portion 101a and the lower end portion of the peripheral wall portion 101b may be adhered or crimped. Although not shown, an air passage hole may be provided in the peripheral wall portion 101b.

As shown in FIG. 2B, a resin coating layer 101d is provided on the inner surface of the paper container 101. The resin coating layer 101d can be provided on both the inner surface of the bottom wall portion 101a and the inner surface of the peripheral wall portion 101b, but may be provided only on one inner surface. Examples of the resin constituting the resin coating layer 101d include polyethylene (PE) and polyvinyl acetate (PVCA). The resin coating layer 101d is firmly fixed to the inner surface of the paper container 101. Instead of the resin coating layer 101d, an adhesive component may be applied.

Since the bottom wall portion 101a and the peripheral wall portion 101b constituting the paper container 101 are made of separate members, there is a possibility that liquid may leak from these joints. In order to prevent this, the resin layer 102 is provided as shown in FIG. 2A. The resin layer 102 is a water-impermeable layer formed inside the paper container 101 having the resin coating layer 101d, and is integrally formed so as to cover the bottom wall portion 101a and the peripheral wall portion 101b, and is integrally formed with the paper container. It is continuous from the bottom wall portion 101a side of the 101 to the upper end portion. The thickness of the resin layer 102 is set to be thicker than the thickness of the resin coating layer 101d.

By providing the resin layer 102, the laminated container 1 can be made water resistant, and various liquids do not leak to the outside. The resin layer 102 is made of a resin different from the resin constituting the resin coating layer 101d, and examples thereof include polypropylene (PP). The resin coating layer 101d is firmly fixed to the inner surface of the paper container 101, while the resin layer 102 is not firmly fixed to the resin coating layer 101d. For example, when the laminated container 100 is discarded, the resin coating layer 101d is not firmly fixed to the inner surface of the paper container 101. The resin layer 102 can be easily peeled off from the resin coating layer 101d with a finger. That is, the adhesion strength between the resin layer 102 and the resin coating layer 101d is set to be lower than the adhesion strength between the resin coating layer 101d and the paper container 101. This is because the resin layer 102 is made of a resin different from the resin coating layer 101d, the adhesive force to one of the other is low, and the resin coating layer 101d is melted at the time of molding the resin layer 102 as described later. By not having.

On the other hand, the adhesion strength between the resin layer 102 and the resin coating layer 101d is set so as not to peel off during normal use of the laminated container 100. Such fixing strength can be obtained by vacuum and compressed air molding of the resin layer 102 as described later.

The resin layer 102 and the resin coating layer 101d may be made of different resins, and may be made of a resin other than polyethylene or polypropylene. The adhesive strength of the resin layer 102 to the resin coating layer 101d may be a combination of resins having a strength that allows the resin layer 102 to be easily peeled off at the time of disposal as described above, but does not easily peel off during normal use. ..

FIG. 3 shows a laminated container 200 that can be manufactured by the manufacturing apparatus 1. In the laminated container 200 shown in FIG. 3, four containers 201 are connected and integrated. Each container 201 is provided with a recess 201a and a flange 201b, and is composed of a paper container and a resin layer, similarly to the laminated container 100 shown in FIG. 2A. Reference numeral 202 indicates a linear weakened portion for dividing the container 201. When a bending force or the like is applied to the linear weakened portion 202, the container 201 is cracked, whereby the container 201 can be divided into four parts.

The resin sheet S is fed from the left side to the right side in FIG. 1. On the left side of FIG. 1, the resin sheet S wound in a coil shape is shown by a virtual line. On the right side of FIG. 1, a virtual line shows a state in which the resin sheet S after molding of the container 100 has been wound up (recovered state). In the description of this embodiment, when the direction of the manufacturing apparatus 1 is defined, it is defined as the upstream side and the downstream side with reference to the feeding direction of the resin sheet S. The upstream side is on the left side of FIG. 1, and the downstream side is on the right side of FIG. Further, when the manufacturing apparatus 1 is viewed from the upstream side in the feeding direction of the resin sheet S, the left side is referred to as the left side of the manufacturing apparatus 1, and the right side is referred to as the right side of the manufacturing apparatus 1. The left-right direction of the manufacturing apparatus 1 is the width direction of the manufacturing apparatus 1.

(Overall configuration of manufacturing equipment 1)
The manufacturing apparatus 1 includes a sheet feeding unit 2, a sheet heating unit 3, a molding unit 4, a carrying unit 5, a suction unit 6, and a control panel 7. The resin sheet S fed by the sheet feed unit 2 is heated by the sheet heating unit 3. When the heated and softened resin sheet S is sent to the molding unit 4, it is molded by the molding unit 4 so as to be in close contact with the inner surface of the paper container 101. As will be described later, the laminated container 100 thus obtained is automatically carried out to the carrying-out unit 5 by the feeding operation of the resin sheet S. The laminated container 100 carried out to the carry-out unit 5 is adsorbed by the suction unit 6 and conveyed to another place. The laminated containers 100 conveyed by the suction unit 6 are stacked and accumulated at a predetermined place.

On the upstream side of the sheet feeding portion 2 of the manufacturing apparatus 1, an upstream support base 8 for supporting the resin sheet S wound in a coil shape so as to be payable is provided. On the downstream side of the carry-out portion 5 of the manufacturing apparatus 1, a downstream support base 9 for supporting the resin sheet S after molding of the laminated container 100 in a wound state is provided. The upstream side support base 8 and the downstream side support base 9 are also members constituting the manufacturing apparatus 1, but these may be omitted.

(Structure of sheet feed unit 2)
The manufacturing apparatus 1 includes, for example, a base 10 fixed to a floor surface 200 or the like of a factory. The sheet feed unit 2 is arranged on the upstream side of the manufacturing apparatus 1, and in this embodiment, it is located between the upstream side support base 8 and the sheet heating unit 3. The sheet feeding portion 2 is fixed to the upper part of the base 10, and the sheet feeding portion 2 is arranged at a position higher than the upstream support base 8. Therefore, the resin sheet S is set in the sheet feed section 2 so as to extend upward from the upstream support base 8 to the sheet feed section 2 toward the downstream side.

The sheet feeding unit 2 is configured by a feeding device for feeding the resin sheet S toward the downstream side. For example, there is a feeding device that presses a roller or the like that is rotationally driven around a horizontal axis against the resin sheet S and feeds it by using the frictional force between the outer peripheral surface of the roller and the surface of the resin sheet S. Various feeders can be used instead of the ones that can be used. The sheet feed unit 2 is connected to a control panel 7, and is controlled by the control panel 7 to control the timing of feed start and stop of the resin sheet S and adjust the feed speed of the resin sheet S. Although not shown, the manufacturing apparatus 1 is provided with a guide member for horizontally guiding both ends of the resin sheet S in the width direction (horizontal direction of the manufacturing apparatus 1), and the resin sheet S is virtual in FIG. As shown by the line, it is sent from the upstream side to the downstream side in a posture extending in a substantially horizontal direction.

The sheet feeding unit 2 may not be arranged on the upstream side of the manufacturing apparatus 1, and may be arranged, for example, on the intermediate portion or the downstream side of the sheet S of the manufacturing apparatus 1 in the feeding direction.

(Structure of sheet heating unit 3)
The sheet heating unit 3 is arranged on the downstream side of the sheet feed unit 2. Specifically, the sheet heating unit 3 is located between the sheet feed unit 2 and the molding unit 4, and is disposed away from the upper mold 40 on the upstream side of the resin sheet S in the feed direction. .. Further, the sheet heating unit 3 is fixed to the downstream side of the sheet feed unit 2 in the upper part of the base 10, and the sheet heating unit 3 is arranged at a position higher than the upstream support table 8.

The sheet heating unit 3 includes a heater support member 3a, a lower heater 3c, and a heater elevating device 3d. The heater support member 3a is configured to project upward from the upper part of the base 10. A heater elevating device 3d is provided above the heater support member 3a. The heater elevating device 3d includes a wire 3e, a pulley 3f around which the wire 3e is wound, and a motor (not shown) that rotates the pulley 3f in the forward and reverse directions.

A lower heater 3c is fixed to one end of the wire 3e. The lower heater 3c is an electric heater that is arranged so as to face the lower surface of the resin sheet S and heats the resin sheet S from below. On the other hand, the other end of the wire 3e is wound around the pulley 3f, and when the pulley 3f is rotated, the wire 3e is fed, and the wire 3e is fed so that the lower heater 3c can be raised and lowered. It has become.

As shown by the solid line in FIG. 1, by setting the lower heater 3c to the lower end position, the lower heater 3c is separated from the resin sheet S and is in the retracted state. By rotating the pulley 3f and setting the lower heater 3c to the rising end position as shown by a virtual line in FIG. 1, the lower heater 3c is in a state of approaching the resin sheet S. In this embodiment, the lower heater 3c can be moved up and down to switch between a state in which the lower heater 3c is approached and a state in which the lower heater 3c is retracted from the resin sheet S, so that the heater is moved in the width direction of the manufacturing apparatus 1. It is possible to prevent the width of the manufacturing apparatus 1 from becoming wider than in the case.

The lower heater 3c of the seat heating unit 3 and the motor for rotating the pulley 3f are connected to the control panel 7 and are controlled by the control panel 7. For example, the output of the lower heater 3c may be adjusted so that the temperature of the resin sheet S becomes suitable for molding, or the lower heater 3c may be retracted from the resin sheet S when heating is not required to heat the resin sheet S. The lower heater 3c can be brought close to the resin sheet S when necessary.

The heating temperature of the resin sheet S by the sheet heating unit 3 can be arbitrarily set according to the resin. In this embodiment, the heating temperature is set so that the resin sheet S is sufficiently softened, whereby the resin sheet S is deformed so as to loosen significantly downward as compared with that before heating. In other words, it is preferable to adjust the heating temperature so that the resin sheet S is greatly loosened.

The sheet heating unit 3 can be covered with a shielding member and arranged in a closed space in order to increase the heating efficiency.

(Structure of molding unit 4)
The molding unit 4 is provided on the downstream side of the sheet heating unit 3, and includes an upper mold (upper mold) 40, a lower mold (lower mold) 41, and a mold driving device 42. The upper mold 40 is arranged on the resin sheet S. As shown in FIG. 6, the upper mold 40 has a holding recess 40a for holding the paper container 101 (shown in FIG. 2B) constituting the outside of the laminated container 100 so as to open downward. It is formed. In the holding recess 40a, the paper container 101 in which the air passage hole 101c is formed is held in a posture of opening downward. Note that FIG. 6 shows only a part of the molded portion 4.

A plurality of suction holes 40c are formed on the inner surface of the holding recess 40a. A vacuum drawing pipe 4a is connected to these suction holes 40c. There may be one suction hole 40c. A vacuuming device 4c (shown only in FIG. 6) is connected to the vacuuming pipe 4a. The evacuation device 4c is a device provided with a conventionally known vacuum pump or the like, is connected to a control panel 7, and is controlled by the control panel 7. By operating the evacuation device 4c, a negative pressure acts on the suction hole 4c via the evacuation pipe 4a. Vacuum pressure acts on the suction hole 40c only during molding of the laminated container 100, for example, or after holding the paper container 101 until before demolding, so that it does not act during demolding of the laminated container 100. This can be controlled by the control panel 7. Further, on the lower surface of the upper mold 40, an upper cut blade 40b is continuously formed so as to surround the lower end opening of the holding recess 40a.

The lower mold 41 has a plug 41b and is arranged directly below the upper mold 40, that is, under the resin sheet S. The lower mold 41 is formed so that the plug accommodating recess 41a accommodating the plug 41b is recessed downward. The plug accommodating recess 41a is open upward, and the upper end opening of the plug accommodating recess 41a substantially coincides with the lower end opening of the holding recess 40a of the upper mold 40.

A plurality of air discharge holes 41d are formed on the inner surface of the plug accommodating recess 41a. An introduction pipe 4b for introducing compressed air is connected to the air discharge hole 41d. There may be one air discharge hole 41d. A compressed air introduction device 4d (shown only in FIG. 6) is connected to the introduction pipe 4b. The compressed air introduction device 4d is a device provided with a conventionally known air compression pump or the like, is connected to a control panel 7, and is controlled by the control panel 7. By operating the compressed air introduction device 4d, air pressure acts on the air discharge hole 41d via the introduction pipe 4b. For example, the air pressure acts on the air discharge hole 41d only during the molding of the resin layer 102, and after molding, it can be prevented from acting at the time of demolding of the laminated container 100, which can be controlled by the control panel 7. ..

The compressed air introduction device 4d may be composed of a switching valve device connected to a factory air pipe, and by controlling the switching valve device by the control panel 7, a state in which air pressure acts on the air discharge hole 41d. It is possible to switch to a state where it does not work.

The manufacturing apparatus 1 according to this embodiment is a vacuum pressure air forming machine capable of forming a resin layer 102 by using the vacuum pressure of the upper mold 40 and the compressed air of the lower mold. Depending on the conditions of the molded product, molding may be performed using only one of the vacuum pressure of the upper mold 40 and the compressed air of the lower mold.

A lower cut blade 41c is continuously formed on the upper surface of the lower mold 41 so as to surround the upper end opening of the plug accommodating recess 41a. For example, as shown in FIG. 9, when the upper mold 40 and the lower mold 41 are closed, a shearing force is applied to the resin sheet S by the lower cut blade 41c and the upper cut blade 40b. The shearing force can cut the peripheral portion of the laminated container 100 in the resin sheet S. That is, when the upper mold 40 and the lower mold 41 are driven in a direction approaching each other and the mold is closed, the cutting blade of one mold is a resin sheet together with the cutting blade of the other mold. It is configured to cut a portion of S that is the peripheral edge of the container 100.

Since it is sufficient that a shearing force capable of cutting can be applied to the resin sheet S, only one of the lower cutting blade 41c and the upper cutting blade 40b is provided, and the cutting blade and the edge portion of the mold are provided. The peripheral portion of the container 100 may be cut at the same time. The structure and shape of the cutting blade are not particularly limited.

Below the lower mold 41, a plug drive device 43 for driving the plug 41b in the vertical direction is provided. The plug drive device 43 can be composed of, for example, a fluid pressure cylinder, a feed screw device, or the like, is connected to a control panel 7, and is controlled by the control panel 7. The lower part of the plug 41b is fixed to the upper part of the plug drive device 43. The plug 41b has a shape similar to a cylinder. The upper surface of the plug 41b is curved so as to project upward. The shape of the plug 41b is not limited to the shape shown in the figure, and can be appropriately changed according to the shape of the laminated container 100 and the like.

The plug drive device 43 has a molding position (shown in FIG. 10) in which the plug 41b protrudes from the upper surface of the lower mold 41 and is inserted into the holding recess 40a of the upper mold 40, and the plug accommodating recess of the lower mold 41. This is for switching to the accommodation position (shown in FIGS. 6 and 7) accommodated in 41a. In the plug drive device 43, the plug 41b is set to the molding position when the resin sheet S is molded (when the resin layer 102 is molded), while the plug 41b is set to the accommodation position when the resin sheet S is fed, for example, after molding. It is configured as follows. When the upper surface of the plug 41b at the molding position is pressed against the resin sheet S from below, the resin sheet S is extended upward and the inner surface of the holding recess 40a of the upper mold 40, that is, the paper container. It is designed to approach the inner surface of 101. The movement of the plug 41b can be controlled so that the plug 41b is accommodated when the resin sheet S is fed. The manufacturing apparatus 1 of this embodiment is a plug-assisted manufacturing apparatus because it includes a plug 41b that is pressed against the resin sheet S.

The mold drive device 42 is a device for driving the upper mold 40 and the lower mold 41 in a direction in which they are in contact with each other, and is connected to a control panel 7 and controlled by the control panel 7. The mold drive device 42 includes an upper mold drive device 44 that drives the upper mold 40 in the vertical direction and a lower mold drive device 45 that drives the lower mold 41 in the vertical direction. Then, the upper mold 40 is moved upward by the upper mold driving device 44, the lower mold 41 is moved downward by the lower mold driving device 45, and the mold is opened, and the upper mold driving device 44 is used. The upper mold 40 is moved downward, and the lower mold 41 is moved upward by the lower mold driving device 45 to switch to a closed state. The upper mold drive device 44 and the lower mold drive device 45 are controlled by the control panel 7 and are synchronized with each other.

That is, the upper mold drive device 44 is composed of, for example, a fluid pressure cylinder, a feed screw device, or a combination thereof, and does not move with respect to the base 10 via a support member or the like (not shown). It is fixed to. The upper mold 40 is connected to the lower part of the upper mold driving device 44, and the upper mold 40 is lowered (shown in FIG. 9) by the upper mold driving device 44 performing an extension operation, while the upper one. The upper mold 40 is raised by the operation of the mold driving device 44 to contract (shown in FIG. 6). The operation start timing and the operation amount of the upper mold drive device 44 are determined by the signal from the control panel 7.

As shown in FIGS. 4 and 5, the lower mold drive device 45 includes an electric motor 45a, a speed reducer 45b, a drive lever 45c, a drive link 45d, a first driven lever 45e, and a second driven lever 45f. And a connecting rod 45h. The electric motor 45a is connected to the control panel 7 and is controlled by the control panel 7. The output of the electric motor 45a is input to the speed reducer 45b. The drive lever 45c is fixed to the output shaft of the speed reducer 45b (the shaft extending in the width direction and the horizontal direction of the manufacturing apparatus 1), and is rotated around the horizontal axis by the rotational force of the output shaft. One end of the drive link 45d is rotatably connected to the tip of the drive lever 45c around a horizontal axis.

On the other hand, the first driven lever 45e and the second driven lever 45f are integrated via a shaft 45g so as not to rotate relatively. The shaft 45 g extends in the horizontal direction and is rotatably supported with respect to the base 10. Therefore, the first driven lever 45e and the second driven lever 45f rotate together about the horizontal axis. The other end of the drive link 45d is rotatably connected to the tip of the first driven lever 45e around a horizontal axis.

One end of the connecting rod 45h is rotatably connected to the tip of the second driven lever 45f around a horizontal axis. The other end of the connecting rod 45h is rotatably connected to the connecting member 41e for connecting the lower mold 41 and the connecting rod 45h around the horizontal axis. The lower mold 41, the plug 41b, and the plug drive device 43 are integrated and moved up and down together.

When the electric motor 45a rotates, the drive lever 45c rotates, and the drive link 45d moves in the left-right direction in FIG. The moving force of the drive link 45d is transmitted to the first driven lever 45e, and the first driven lever 45e and the second driven lever 45f rotate about the horizontal axis. When the second driven lever 45f rotates, the connecting rod 45h moves in the vertical direction, whereby the lower mold 41 to which the connecting rod 45h is connected via the connecting member 41e moves up and down. The lower mold 41 can be raised or lowered depending on the rotation direction of the electric motor 45a. The rotation direction, rotation speed, rotation start and stop of the electric motor 45a can be controlled by a signal from the control panel 7, whereby the operation start timing and the operation amount of the lower mold 41 are determined. To. The state shown in FIG. 4 is a state in which the lower mold 41 is located at the rising end, and the state shown in FIG. 5 is a state in which the lower mold 41 is located at the falling end.

The configuration of the lower mold driving device 45 described above is an example, and is not limited to the configuration described above. For example, the lower mold drive device 45 can be configured with a fluid pressure cylinder or the like.

The compressed air introduction device 4d introduces compressed air into the lower mold 41 when the upper mold 40 and the lower mold 41 are closed, and the upper mold 40 and the lower mold 41 are opened. When it is present, it is controlled by the control panel 7 so as not to introduce compressed air. Similarly, the vacuum drawing device 4c evacuates when the upper mold 40 and the lower mold 41 are closed, and evacuates when the upper mold 40 and the lower mold 41 are open. It is controlled by the control panel 7 so as not to prevent it.

Further, the mold driving device 42 is configured so that when the sheet feeding unit 2 feeds the resin sheet S, the lower mold 41 is lowered as compared with the time when the resin sheet S is molded. That is, as shown in FIG. 6, when the sheet feeding unit 2 feeds the resin sheet S, the upper surface of the lower mold 41 is positioned below the locus of the resin sheet S (indicated by a virtual line). The lower mold drive device 45 is operated. As a result, a predetermined gap is formed between the upper surface of the lower mold 41 and the lower surface of the resin sheet S. It is not necessary to form a predetermined gap between the upper surface of the lower mold 41 and the lower surface of the resin sheet S. In this case as well, the resin sheet S is lowered by the amount that the upper surface of the lower mold 41 is lowered. The degree of interference with the lower surface of the plastic can be reduced. After that, when the feeding operation of the resin sheet S is stopped, as shown in FIGS. 9 to 11, when the resin sheet S is molded, the lower surface of the lower mold 41 comes into contact with the lower surface of the resin sheet S. The mold drive device 45 is operated.

When the feeding operation of the resin sheet S by the sheet feeding unit 2 is stopped, the lower mold driving device 45 of the mold driving device 42 raises the lower mold 41 as compared with the feeding of the resin sheet S (FIG. 9). show). At this time, the upper surface of the lower mold 41 is located on the trajectory of the resin sheet S, that is, at a position where it contacts the lower surface of the resin sheet S, so that the heated and loose resin sheet S can be supported from below. can.

A plurality of upper molds 40 and lower molds 41 may be provided side by side in the feeding direction of the resin sheet S, or may be provided side by side in the left-right direction of the manufacturing apparatus 1. Further, a plurality of holding recesses 40a may be formed in one upper mold 40, or a plurality of plug accommodating recesses 41a may be formed in one lower mold 41.

As shown in FIG. 6, the molding portion 4 has an in-mold suction portion 49. The in-mold suction portion 49 is a portion for sucking the paper container 101. A vacuum drawing pipe (not shown) is connected to the in-mold suction portion 49, and a negative pressure acts on the lower end portion of the in-mold suction portion 49.

The suction unit 49 in the mold is moved up and down by a drive device (not shown), and the position shown by the solid line in FIG. 6 is the ascending position and the position shown by the virtual line is the descending position. By setting the in-mold suction unit 49 in the lowered position by the driving device, the paper container 101 can be sucked and held in the in-mold suction part 49. By raising the in-mold suction portion 49 holding the paper container 101 by the driving device, the paper container 101 can be housed and held in the upper mold 40 as shown by the solid line in FIG.

FIG. 7 shows a modified example of the molded portion 4. In this modification, two upper molds 40 and a lower mold 41 are provided side by side in the feeding direction of the resin sheet S. This makes it possible to mold a plurality of laminated containers 100 at the same time. Three or more of the upper mold 40 and the lower mold 41 may be provided side by side in the feeding direction of the resin sheet S.

(Structure of supply device 60)
As shown in FIG. 1, the manufacturing apparatus 1 includes a supply apparatus 60 for supplying a paper container 101 on the upstream side of the molding unit 4. The upstream side is the upstream side in the feeding direction of the resin sheet S. As shown in an enlarged manner in FIG. 8, the manufacturing apparatus 1 includes a cylindrical accommodating portion 61 accommodating a paper container 101, a slider 62 that slides in the horizontal direction, and a slider drive device 63 that drives the slide member 62. And have.

In the case of the modification shown in FIG. 7, the paper container 101 can be stored in the accommodating portion 61 side by side in two rows in the feeding direction of the resin sheet S. The paper container 101 is housed in a posture in which the open portion is located at the bottom, and a large number of the paper containers 101 are stacked one above the other. Only one row of paper containers 101 may be accommodated in the accommodating portion 61.

At the lower part of the accommodating portion 61, a drop device (not shown) for dropping only the bottom paper container 101 downward is provided, and the paper container 101 dropped by this drop device is shown by a virtual line. The slider 62 is driven by the slider drive device 63 in the feed direction of the resin sheet S. The main body portion of the supply device 60 is conveyed to the molding unit 4 together with the paper container 101 by the slider 62, and then the paper container 101 can be dropped onto the resin sheet S and arranged as shown by a solid line in FIG. The structure of the supply device 60 described above is an example, and a supply device having another structure may be used.

(Structure of carry-out unit 5)
As shown in FIG. 1, the carrying-out portion 5 is provided on the downstream side of the molding portion 4, and includes a support base 50, a container mounting member 51, and a mounting member driving device 52. The support base 50 is fixed to the floor surface 200. A mounting member driving device 52 is fixed to the upper surface of the support base 50. A container mounting member 51 is fixed to the mounting member driving device 52. The container mounting member 51 is provided on the downstream side of the resin sheet S in the feeding direction with respect to the upper mold 40 and the lower mold 41, and is arranged below the resin sheet S. The container mounting member 51 is close to the upper mold 40 and the lower mold 41 so that the laminated container 100 does not fall between the container mounting member 51 and the upper mold 40 and the lower mold 41. It has become.

The laminated container 100 immediately after being manufactured is placed on the container mounting member 51 when it is sent downstream together with the resin sheet S from between the upper mold 40 and the lower mold 41. ing. The container mounting member 51 can be made of, for example, a plate material extending in the horizontal direction. The downstream end of the container mounting member 51 can be bent or tilted downward. As a result, the laminated container 100 mounted on the upper surface of the container mounting member 51 can easily move from the upper surface of the container mounting member 51 to the downstream side.

The mounting member driving device 52 is a device for moving the container mounting member 51 in the vertical direction to switch between the lower position and the upper position, and can be configured by, for example, a fluid pressure cylinder or a feed screw device. The mounting member drive device 52 is connected to the control panel 7 and is controlled by the control panel 7. The mounting member drive device 52 keeps the container mounting member 51 in a lower position (shown in FIGS. 12, 13 and 15) before the laminated container 100 is mounted, and the laminated container 100 is mounted. After that, it is configured to switch to the upper position (shown in FIG. 14).

When the container mounting member 51 is in the lower position, the upper surface of the container mounting member 51 is located below the locus of the resin sheet S. As a result, when the laminated container 100 is sent downstream together with the resin sheet S from between the upper mold 40 and the lower mold 41, it does not get caught in the container mounting member 51, and the container mounting member does not get caught. It is securely placed on 51.

When the container mounting member 51 is in the upper position, the upper surface of the container mounting member 51 is substantially the same as the locus of the resin sheet S or is located above the locus of the resin sheet S. As a result, the upper end portion of the laminated container 100 approaches the suction portion 6, and the container 100 is easily sucked by the suction portion 6.

(Structure of adsorption unit 6)
The suction unit 6 is a device arranged above the upper end of the laminated container 100 mounted on the container mounting member 51 and for sucking and transporting the laminated container 100. A vacuum drawing pipe 6a is connected to the suction portion 6, and a negative pressure acts on the lower end portion of the suction portion 6. Further, the suction unit 6 has, for example, an arm 6b fixed to a transport device (not shown), and the laminated container 100 is placed at an arbitrary location by the transport device with the arm 6b fixed to the transport device. It can be transported. The transport device may be, for example, a robot or the like.

(Configuration of control panel 7)
The control panel 7 is a control device that controls the sheet feed unit 2, the sheet heating unit 3, the molding unit 4, the carry-out unit 5, and the suction unit 6, and may be configured by, for example, a conventionally known microcomputer or sequencer. can. The control panel 7 can store the operation timing, operation speed, operation order, etc. of the sheet feed unit 2, the sheet heating unit 3, the molding unit 4, the carry-out unit 5, and the suction unit 6 as a program. .. The control panel 7 operates the sheet feed unit 2, the sheet heating unit 3, the molding unit 4, the carry-out unit 5, and the suction unit 6 according to the stored program as described later.

(Production method)
Next, a method of manufacturing the laminated container 100 using the manufacturing apparatus 1 configured as described above will be described. The method described below can be realized by a program stored in the control panel 7, but may be performed by each operator.

First, the resin sheet S is set in the sheet feed unit 2. This is done by the worker. Then, when the operator operates the control panel 7, the sheet feeding unit 2 feeds the resin sheet S to a predetermined position. Further, after the lower heater 3c of the sheet heating unit 3 is turned on to start energization and preheating is completed, the lower heater 3c is set to the rising end position. As a result, the lower heater 3c approaches the resin sheet S and heats the resin sheet S until it reaches a predetermined temperature suitable for molding. The resin sheet S is softened and loosened by being heated by the lower heater 3c. This is the sheet heating process.

Further, the molding unit 4 is kept in a state where the mold is opened by the mold driving device 42 as shown in FIG. At this time, the upper mold 40 is moved upward by the upper mold driving device 44, and the lower mold 41 is moved downward by the lower mold driving device 45, and the upper mold is placed on the upper surface and the lower surface of the resin sheet S. Prevent the mold 40 and the lower mold 41 from hitting. Thereby, when the resin sheet S is fed, the resin sheet S can be prevented from interfering with the upper mold 40 and the lower mold 41. This is the evacuation process.

Further, as shown in FIG. 8, the supply device 60 supplies the paper container 101 onto the resin sheet S. By feeding the resin sheet S, as shown in FIG. 6, the paper container 101 is conveyed to just below the upper mold 40. After sucking the paper container 101 with the in-mold suction portion 49 in the lowered position, the in-mold suction portion 49 is set in the ascending position, and the paper container 101 is placed in the holding recess 40a of the upper mold 40 in the ascending position. Hold it in an open position. The paper container 101 may be manually inserted and held in the holding recess 40a by an operator. This is the holding process.

The sheet heating step and the holding step may be performed in parallel, or one of them may be performed first. Since the lower heater 3c is separated upstream and downward from the paper container 101 held in the holding recess 40a, the heat of the lower heater 3c causes the resin coating layer 101d of the paper container 101 to be separated. Does not melt.

After stopping the feeding of the resin sheet S by the sheet feeding unit 2, as shown in FIG. 9, the upper mold 40 is moved downward by the upper mold driving device 44, and the upper mold 40 is moved downward by the lower mold driving device 45. The mold 41 is moved upward to close the mold. This is the mold closing process. A shearing force is applied to the resin sheet S by the lower cutting blade 41c and the upper cutting blade 40b, and the shearing force completely cuts the peripheral portion of the resin layer 102 in the resin sheet S. , The mold closing step and the cutting step are performed at the same time. At this time, the peripheral portion of the resin layer 102 should be sandwiched in the thickness direction by the peripheral edge of the holding recess 40a of the upper mold 40 and the peripheral edge of the plug accommodating recess 41a of the lower mold 41. Can be done. The timing for cutting the resin sheet S may be until the upper mold 40 and the lower mold 41 are opened, and the molding of the resin layer 102 is completed without cutting until the molding of the resin layer 102 is completed. After that, the upper mold 40 may be moved downward, or the lower mold 41 may be moved upward to apply a shearing force to the resin sheet S to cut the resin sheet S.

After that, as shown in FIG. 10, the plug 41b is raised by the plug drive device 43 to set the molding position so as to protrude from the upper surface of the lower mold 41. As a result, the resin sheet S is stretched upward by the upper surface of the plug 41b and approaches the inner surface of the paper container 101.

At this time, a negative pressure acts in the holding recess 40a of the upper mold 40 via the evacuation pipe 4a. As shown in FIG. 2A, since the air passage hole 101c is formed in the paper container 101, the inside of the paper container 101 becomes negative pressure through the air passage hole 101c, and the softened resin sheet S is formed. It is molded in close contact with the inner surface of the paper container 101. Since the resin coating layer 101d is not melted, the softened resin sheet S is in close contact with the solidified resin coating layer 101d. At this time, since the compressed air is introduced into the lower mold 41 by the compressed air introduction device 4d, the resin sheet S is pressed against the inner surface of the paper container 101 by the compressed air. That is, by vacuum- and pressure-molding the resin sheet S, the resin layer 102 is formed inside the paper container 101 so as to be brought into close contact with the inner surface of the paper container 101 with a strong force. Since the resin sheet S has a strong adhesion to the paper container 101 during molding, the resin layer 102 does not easily come off from the paper container 101, that is, the resin coating layer 101d during normal use. On the other hand, since the resin layer 102 and the resin coating layer 101d of the paper container 101 are different resins, the adhesive strength between them is not so high, and the laminated container 100 can be easily separated at the time of disposal. This is the molding process. As described above, the production of the laminated container 100 is completed. Subsequent steps may be performed as needed and may be omitted.

Next, as shown in FIG. 12, the upper mold 40 is moved upward by the upper mold driving device 44, and the lower mold 41 is moved downward by the lower mold driving device 45 to open the mold. do. During this period, the laminated container 100 is gradually cooled, and the resin layer 102 is cured. When opening the mold, although not shown, the laminated container 100 can be pushed downward and released from the upper mold 40 by a mold release pin or the like provided on the upper mold 40 as is well known in the past. In the laminated container 100 released from the upper mold 40, the lower end portion of the laminated container 100 (which becomes the upper end portion when the laminated container 100 is used) is placed on the upper surface of the lower mold 41 due to the weight of the laminated container 100. In the state, the laminated container 100 is supported from below by the lower mold 41, and the falling of the laminated container 100 can be suppressed. As described above, the lower mold 41 is lowered by the lower mold driving device 45 so that the upper surface of the lower mold 41 is located below the resin sheet S, so that the lower end portion of the laminated container 100 is formed. Will be located below the lower surface of the resin sheet S.

Further, as shown in FIG. 12, in the resin sheet S, a hole S1 is formed in a trace cut from the laminated container 100. Since the lower end of the laminated container 100 is located below the lower surface of the resin sheet S, the height of the hole S1 is higher than the lower end of the laminated container 100, that is, the peripheral wall portion (side surface portion) of the laminated container 100. ) Corresponds to the height. Therefore, after that, when the resin sheet S is fed by the sheet feeding portion 2, the peripheral wall portion of the laminated container 100 is engaged in a state of being caught in the peripheral portion of the hole S1 of the resin sheet S, so that the laminated container 100 engages. It will be sent to the downstream side together with the resin sheet S. This makes it possible to easily take out the container 100 from between the upper mold 40 and the lower mold 41 by using the resin sheet S without providing a dedicated member or device for taking out the laminated container 100. Become. Since the height of the lower mold 41 when the mold is opened is set as described above, the peripheral wall portion of the laminated container 100 and the peripheral edge portion of the hole S1 of the resin sheet S must be securely engaged. Can be done.

The laminated container 100 taken out from between the upper mold 40 and the lower mold 41 by the operation of the sheet feed unit 2 is placed on the upper surface of the container mounting member 51 as shown in FIG. At this time, the container mounting member 51 is positioned at a lower position, and the upper end portion of the laminated container 100 (which becomes the lower end portion when the laminated container 100 is used) and the lower end portion of the suction portion 6 are separated from each other by a predetermined distance. This predetermined distance is a distance that can be set by the weight of the laminated container 100, the suction force exerted by the suction unit 6, and the like, and it is preferable to keep the predetermined distance at least a distance at which the laminated container 100 is not attracted to the suction unit 6. Specifically, if the weight of the laminated container 100 is heavy, it can be shortened as compared with the case where it is light, and if the suction force exerted by the suction unit 6 is large, it can be made longer than when it is small.

After mounting the laminated container 100 on the upper surface of the container mounting member 51, the mounting member driving device 52 switches the container mounting member 51 to the upper position as shown in FIG. As a result, the distance between the upper end portion of the laminated container 100 and the lower end portion of the suction portion 6 becomes less than a predetermined distance, so that the laminated container 100 is sucked by the suction portion 6. The distance between the upper end portion of the laminated container 100 and the lower end portion of the suction portion 6 when the laminated container 100 is set to the upper position is set so that the upper end portion of the laminated container 100 is reliably sucked.

After that, as shown in FIG. 15, the mounting member driving device 52 switches the container mounting member 51 to the lower position without moving the suction unit 6. Since the upper end portion of the laminated container 100 is adsorbed by the suction portion 6, the laminated container 100 is in a state of being separated from the upper surface of the container mounting member 51. Then, the laminated container 100 is transported to an arbitrary place by a transport device and accumulated. Since the laminated container 100 is molded with an opening at the bottom, it can be stacked and stocked as it is without being turned upside down.

(Action and effect of the embodiment)
As described above, according to the manufacturing apparatus 1 according to this embodiment, the heat-softened resin sheet S is vacuum- and pressure-molded so as to be brought into close contact with the inner surface of the paper container 101 with a strong force. The resin layer 102 can be integrally molded inside the paper container 101. Since the resin sheet S has a strong adhesion to the paper container 101 during molding, the resin layer 102 is less likely to come off from the paper container 101 during use. On the other hand, since the resin layer 102 and the resin coating layer 101d of the paper container 101 are different resins, the adhesive strength is not so high, and they can be easily separated at the time of disposal. Therefore, it is possible to easily separate and dispose of the paper container 101 and the resin layer 102 at the time of disposal while preventing the paper container 101 and the resin layer 102 from being unexpectedly separated at the time of use.

In the above embodiment, the resin coating layer 101d is provided inside the paper container 101, but the resin coating layer 101d may be omitted and the resin layer 102 may be fixed to the paper of the paper container 101. good. In this case as well, since the material of the resin layer 102 is different from that of paper, separate disposal becomes easy. On the other hand, since the resin layer 102 can be vacuum- and compressed air-molded and brought into close contact with the paper, it is possible to prevent the resin layer 102 from peeling off from the paper during normal use.

The above embodiments are merely exemplary in all respects and should not be construed in a limited way. Further, all modifications and modifications belonging to the equivalent scope of the claims are within the scope of the present invention.

In the above embodiment, the upper cut blade 40b and the lower cut blade 41c cut the peripheral portion of the resin layer 102 in the resin sheet S, but the present invention is not limited to this, and the upper cut blade 40b and the lower side are not limited to this. The cutting blade 41c may be omitted, and after the manufacturing process in the manufacturing apparatus 1 is completed, the cutting blade 41c may be separately separated from the resin sheet S by using a trimming machine or the like.

As described above, the present invention can be used, for example, in the case of manufacturing a laminated container in which a resin layer is formed on the inner surface of a paper container and integrated.

1 Manufacturing equipment 2 Sheet feed unit 3 Sheet heating unit 6 Adsorption unit 40 Upper mold (upper mold)
40a Holding recess 40b Upper cut blade 41 Lower mold (lower mold)
41a Plug accommodating recess 41b Plug 41c Lower cut blade 42 type drive device 44 Upper mold drive device 45 Lower mold drive device 51 Container mounting member 52 Mounting member drive device 100 Laminated container 101 Paper container 101c Air passage hole 101d Resin coating layer 102 Resin layer S Resin sheet

Claims (5)

In a laminated container manufacturing apparatus in which a resin layer made of a resin different from the resin coating layer is formed inside a paper container having a resin coating layer.
A sheet heating unit that heats and softens the resin sheet that becomes the resin layer,
An upper mold having a recess placed on the resin sheet heated by the sheet heating unit and holding the paper container in which an air passage hole is formed in an open posture.
A vacuuming device connected to a suction hole formed on the inner surface of the concave portion of the upper mold, and a vacuum drawing device.
A lower mold placed under the resin sheet heated by the sheet heating unit, and
A mold driving device that drives at least one of the upper mold and the lower mold in a direction in which they are brought into contact with each other and separated from each other.
A device for manufacturing a laminated container, which comprises a compressed air introduction device for introducing compressed air into the lower mold when the mold is closed. In the laminated container manufacturing apparatus according to claim 1,
The lower mold is an apparatus for manufacturing a laminated container, characterized by having a plug inserted into the recess of the upper mold. In the laminated container manufacturing apparatus according to claim 2.
A plug drive device for switching between a molding position in which the plug protrudes from the upper surface of the lower mold and a storage position housed in the lower mold is provided.
The plug drive device is a device for manufacturing a laminated container, characterized in that the plug is set at a molding position when the resin sheet is molded, while it is set at a storage position after molding. In the laminated container manufacturing apparatus according to any one of claims 1 to 3.
A sheet feed unit for feeding the resin sheet is provided.
The sheet heating unit is an apparatus for manufacturing a laminated container, characterized in that the sheet heating unit is arranged away from the upper mold on the upstream side in the feeding direction of the resin sheet. In a method for manufacturing a laminated container in which a resin layer made of a resin different from the resin coating layer is formed inside a paper container having a resin coating layer.
A sheet heating step of heating and softening the resin sheet to be the resin layer,
A holding step of holding the paper container in which an air passage hole is formed in a concave portion of an upper mold arranged on the resin sheet heated in the sheet heating step in a posture of opening downward.
After the sheet heating step and the holding step, the upper mold and the lower mold arranged below the upper mold are closed, a negative pressure is applied to the inner surface of the concave portion of the upper mold, and the lower mold is applied. A laminated container characterized by comprising a molding step of forming the resin sheet heated in the sheet heating step in close contact with the inner surface of the paper container by introducing compressed air into the container. Production method.

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