WO2003035370A1

WO2003035370A1 - Device and method for manufacturing packing container, and packing container provided by the method

Info

Publication number: WO2003035370A1
Application number: PCT/JP2002/010940
Authority: WO
Inventors: Hiroyuki Takahashi
Original assignee: Idemitsu Unitech Co., Ltd.
Priority date: 2001-10-22
Filing date: 2002-10-22
Publication date: 2003-05-01
Also published as: JP4095785B2; JP2003127217A

Abstract

A packing container manufacturing device (1), comprising a heating device (80) for heating a multi-layer sheet (30) of thermoplastic resin type, a molding device (50) for molding a packing container, a slitting device (60) for slitting the flange part of the packing container, and a transfer device (70) for intermittently transferring the multi-layer sheet (30) from the molding device (50) to the slitting device (60) while holding both ends of the multi-layer sheet (30).

Description

Packaging container manufacturing apparatus, packaging container manufacturing method, and packaging container manufacturing method

Technical field

The present invention relates to a packaging container manufacturing apparatus, a packaging container manufacturing method, and a packaging container obtained by the manufacturing method.

Akita

Background art

Conventionally, in food packaging containers and the like, in order to ensure sealing and easy-opening, a multi-layer container is used, and an annular cut is formed in a flange provided on the periphery of the opening of the container. There is known an easily openable fresh container in which a material film is strongly adhered (fused) to a flange and sealed, and the innermost layer of a container flange portion is peeled off integrally with a lid film at the time of opening.

In such a container, the sealing property is ensured by the lid film adhered to the periphery of the opening, but it was necessary to form an annular cut at a specific position to ensure easy opening. .

Therefore, if the position of the cut is shifted, the lid material film may overlap with the heat seal, and the sealing property may be reduced, or it may be difficult to open easily.

For the above-mentioned difficulty in opening, there is known a method of forming a cut at the same time as molding a container. However, in the case of container molding, since the flange of the container is heated, the cut formed tends to return to its original shape when the cutting blade is pulled out, making it difficult to form the cut reliably. is there. In addition, when the notch is formed by using the heated cutting blade after the container is formed because the flange portion is heated, there is a problem that the heating blade is not effectively used.

To solve the above-mentioned problem of notch formation, after forming the container, with a flange It is common practice to make the cut after the container has cooled.

However, even in the above-described notch forming method, container molding from a raw material sheet, which is a thermoplastic resin multilayer sheet, forms a relatively large number of containers at the same time. However, there is a problem that the sheet formed with the container is distorted, so that it is difficult to form the cuts with high accuracy, and that the manufacturing equipment becomes complicated and the operation becomes complicated. Disclosure of the invention

INDUSTRIAL APPLICABILITY The present invention provides a packaging container manufacturing apparatus and a packaging container manufacturing method, which have high accuracy in forming a cut in a flange portion of a container, have a simple structure, are simple in operation, and can effectively use a heating blade for forming a cut. The main object is to provide a method and a packaging container obtained by this manufacturing method. The apparatus for manufacturing a packaging container according to the present invention is provided with a container molding apparatus for molding a thermoplastic resin multi-layer sheet after heating, and then molding a container having a flange at the periphery of the opening, and provided adjacent to the container molding apparatus. A cutting device for forming a cut in the flange portion; and a conveying device for intermittently conveying the thermoplastic resin multilayer sheet while holding both sides thereof.

Here, examples of the transfer device include a spike chain that can pierce a thermoplastic resin multilayer sheet. The spike chain is a chain in which a plurality of spikes protrude outside a chain-shaped member wound around two or more gears. The cutting device is preferably a device that is separate from the container forming device that forms the container by thermoforming, so that the vicinity of the cutting blade that forms the cut or the cutting blade itself can generate heat. .

According to the present invention, since the container forming device for forming the container and the cutting device for forming the cut in the flange portion are separate devices, they remain in the thermoplastic resin multilayer sheet at the time of forming the container. The heat is used to cut the thermoplastic resin multi-layer sheet from the softened state to the solidified state while cooling. In addition, since the sheet after the formation of the container is held on both sides by the conveying device and positioned without deformation, the accuracy of forming the cut in the flange portion of the container can be improved. In addition, since the heating blade for forming the cut can be used in a state where the thermoplastic resin multilayer sheet is being cooled and solidified, the cut is made with the heating blade that heats and melts the solidified thermoplastic resin multilayer sheet. Because it can be formed, the heating blade can be used effectively.

In addition, by including the transport device, the container transports the molded thermoplastic resin multi-layer sheet, so that a packaging container manufacturing device having a simple structure and simple operation can be provided. In the packaging container manufacturing apparatus of the present invention, the container forming apparatus includes a pressurized air box and a molding die unit that approaches and separates from the pressurized air box, and the cutting device includes a cutting blade section that forms a cut, It is preferable that a container receiving portion approaching and separating from the notch blade portion is provided, and the compressed air box and the notch blade portion are preferably fixed to the apparatus body.

Here, the compressed air box refers to a facility for forming a sealed space with a molded thermoplastic resin multilayer sheet when performing compressed air molding or vacuum compressed air molding.

According to this, the thermoplastic resin multi-layer sheet can be sandwiched between the compressed air box and the molding die portion and between the cutting blade portion and the container receiving portion, respectively. It can be performed with a uniform compression force on the front and back of the resin multilayer sheet.

In the packaging container manufacturing apparatus of the present invention, it is preferable that the molding die section and the container receiving section operate simultaneously.

According to this, the molding die portion and the container receiving portion operate simultaneously, so that the thermoplastic resin multilayer sheet is simply transported by the transport equipment, and the container is formed and the cut is formed in the same thermoplastic resin multilayer sheet. It can be performed.

In the packaging container manufacturing apparatus of the present invention, it is preferable that the cutting blade has a heating means. According to this, since the notch blade portion has the heating means, the notch can be formed by melting the thermoplastic resin multilayer sheet, so that the notch can be formed more easily.

In the packaging container manufacturing apparatus of the present invention, it is preferable that the container molding apparatus is a plug assist molding apparatus.

In the plug assist molding, the thermoplastic resin multilayer sheet to be molded is preformed so that the thickness of the molded article can be made uniform. The method for manufacturing a packaging container according to the present invention includes a container forming step of heating and then thermoforming the thermoplastic resin multilayer sheet to form a container having a flange at the periphery of the opening; And a notch step of forming a cut in the flange portion after transferring the thermoplastic resin multilayer sheet, wherein the container forming step and the cut step are intermittently carried out. The feature is that it is performed continuously.

According to the present invention as described above, the container forming step of forming the container and the cutting step of forming the cut in the flange part are separate steps, whereby the heat remaining in the thermoplastic resin multilayer sheet at the time of forming the container is reduced. In this way, the notch can be formed in the notching process while the thermoplastic resin multilayer sheet is being cooled and solidified from the softened state, and the sheet after the container molding is held on both sides by the conveying device, and is not deformed. Since it is determined, the accuracy of forming the cut in the flange portion of the container can be improved. In addition, since the heating blade for forming the cut can be used in a state where the thermoplastic resin multilayer sheet is being cooled and solidified, the cut is made with the heating blade for heating and melting the solidified thermoplastic resin multilayer sheet. Since it can be formed, the heating blade can be used effectively.

In addition, since the container is configured to include the transporting step, the container transports the molded thermoplastic resin multilayer sheet, so that the structure is simple and the operation is simple.

In the method for producing a packaging container according to the present invention, it is preferable that the container forming step is performed by plug assist molding. In the plug assist molding, preforming is performed with a plug on a molded thermoplastic resin multilayer sheet, and the thickness of the molded product can be made uniform. In the method for manufacturing a packaging container according to the present invention, it is preferable that the container forming step is performed by air pressure forming using a pressurized air box and a molding die portion that approaches and separates from the pressurized air box. Preferably, the cutting operation is performed by a cutting blade portion to be formed and a container receiving portion approaching / separating from the cutting blade portion. According to this, as in the case of the packaging container manufacturing apparatus, the molding and cutting of the container can be performed with a uniform compressive force on the front and back of the thermoplastic resin multilayer sheet. In the method for manufacturing a packaging container according to the present invention, it is preferable that the molding die and the container receiver operate simultaneously.

According to this, similarly to the packaging container manufacturing apparatus, the container can be formed and the cuts can be formed on the same thermoplastic resin multilayer sheet only by transporting the thermoplastic resin multilayer sheet by the transport equipment.

In the method for producing a packaging container according to the present invention, it is preferable that the container is punched at the same time as or before and after the notch formation in the notch step.

According to this, the heat remaining in the heated thermoplastic resin multilayer sheet is released at the same time as the punching by punching the container at or before and after the notch formation in the notching step. Since the cut portion is surely cooled and solidified, the cut can be formed more accurately. A packaging container of the present invention is characterized by being obtained by the above-described method for producing a packaging container.

According to this, as in the case of the packaging container manufacturing apparatus, a high sealing property can be ensured by bonding (fusing) the lid material film of the packaging container, and opening at the time of use can be easily performed. BRIEF DESCRIPTION OF THE FIGURES 0940

6

FIG. 1 is a plan view showing a packaging container according to one embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of the packaging container of FIG.

FIG. 3 is a partial cross-sectional view showing a use state of the packaging container of FIG. 1, wherein FIG. 3 (A) is a packaging container with a lid member adhered, and FIG. 3 (B) is a deformation of the lid member due to the container internal pressure. FIG. 3 (C) shows a state in which the inner layer 4 OA has been physically peeled off when opened. FIG. 4 is a diagram showing a packaging container manufacturing apparatus according to one embodiment of the present invention, wherein FIG. 4 (A) is a top view and FIG. 4 (B) is a side view.

FIG. 5 is a sectional view showing an apparatus for manufacturing the packaging container of FIG.

FIG. 6 is a cross-sectional view showing a cutting facility according to an embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a container forming procedure (container forming) using the manufacturing apparatus of FIG.

FIG. 8 is a cross-sectional view showing a container forming procedure (cut formation) using the manufacturing apparatus of FIG.

FIG. 9 is a sectional view showing a container forming procedure (intermittent / continuous) using the manufacturing apparatus of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[1] Packaging containers

First, the packaging container 40 formed by the packaging container manufacturing apparatus of the present invention will be described.

As shown in FIGS. 1 and 2, the packaging container 40 has a circular bottom portion 41 having a convex portion 41 A formed by two steps at the center portion, and a bottom portion 41 having a circular shape. Side surface 42 formed from the periphery of the opening, an opening 43 formed at the upper end surrounded by the side surface 42, and extending outward from the periphery of the opening 43. And a flange portion 44.

The side surface portion 42 is formed in a tapered shape whose diameter increases from the bottom surface portion 41 to the opening portion 43. Also, on the side of the opening 43 in the flange 44, the entirety of the opening 43 is provided. 0210940

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An annular cut 45 is formed around the circumference.

As shown in FIG. 2, the container 40 has a three-layer structure including an inner layer 40A, an intermediate layer 40B, and an outer layer 40C from the surface. A notch 45 is formed by making a V-shaped cut in only OA.

FIG. 3A shows the packaging container 40 to which the lid member 46 is adhered. The lid member 46 has a two-layer structure of a front surface layer 46A and a back surface layer 46B. Specifically, the back surface layer 46B of the lid member 46 is heat-sealed (heat-sealed) to the outer peripheral portion from the cut 45 of the flange portion 44 and adhered.

FIG. 3 (B) shows a state in which the sandal member 46 is deformed by the internal pressure of the container. Due to this container internal pressure, stress concentrates on the inner peripheral end portion where the lid member 46 and the flange portion 44 are bonded to the lid member 46 that is about to be peeled from the opening 43 side. Therefore, peeling of the inner layer 4 OA from the cut 45 does not occur, and high sealing performance is secured.

FIG. 3 (C) shows a state in which the inner layer 4OA of the flange portion 44 has peeled off. The opening force is such that stress is concentrated on the inner layer 4OA and the intermediate layer 40B due to the strong adhesion between the back layer 46B and the inner layer 4OA. Then, the inner layer 4 OA at the portion of the flange portion 44 adhered to the lid member 46 is peeled off together with the lid member 46 by peeling between the two layers controlled to a relatively low adhesive force. The adhesive strength between the inner layer 4OA and the intermediate layer 40B can be determined by the combination of the inner layer 4OA and the intermediate layer 4OB. Specifically, an adhesive force of about 5.0-10.0 NZ15 mm is preferable. The notch 45 may be any shape as long as the inner layer 4OA corresponding to the bonding portion of the lid member 46 can be peeled off at the time of opening, and its shape, depth, and the like can be arbitrarily determined. [2] packaging container manufacturing equipment

Next, the manufacturing apparatus 1 for the above-described packaging container 40 will be described. FIG. 4 (FIG. 4 (A) is a top view, and FIG. 4 (B) is a side view) schematically shows a packaging container manufacturing apparatus 1 according to an embodiment of the present invention. The packaging container manufacturing device 1 includes a heating device 80 for heating a multilayer sheet 30 which is a thermoplastic resin multilayer sheet, a molding device 50 for molding the packaging container 40, and a flange portion of the packaging container 40. A cutting device 60 for forming cuts 4 5 in 4 4, and a conveying device 70 for intermittently holding both sides of the multilayer sheet 30 and conveying the molding sheet 50 to the cutting device 6 °. It is configured.

The manufacturing apparatus 1 is installed adjacent to the heating apparatus 80, the forming apparatus 50, and the cutting apparatus 60 in the traveling direction of the multilayer sheet 30 as shown by the arrow in this order. The transport device 70 is arranged inside between upper and lower devices constituting the heating device 80, the forming device 50, and the cutting device 60, respectively.

The heating device 80 includes an upper heater 81 disposed above the multilayer sheet 30 of the transport device 70 and a lower heater 82 disposed below the multilayer sheet 30. The upper heater 81 and the lower heater 82 are electric heaters, and there is no particular limitation as long as the heater has a function such as temperature adjustment.

As shown in FIGS. 4 and 5, the molding device 50 includes an upper device main body 51 and a lower base 52.

The apparatus main body 51 includes a compressed air box 5 10, a movable section 5 11, a plug 5 12, a partition plate 5 13, and a support 5 14.

The compressed air box 5 10 is composed of a box-shaped metal member that is open on the lower side, and a partition plate 5 13 that has a number of holes for forming the container. In addition, an injection hole 51OA for injecting air from outside is formed below the compressed air box 501. The movable portion 5111 is a metal member composed of a hollow rod-shaped member and a plate-shaped member provided at the tip thereof, and a plug 5112 is provided at the base end of the plate-shaped member, and the compressed air box is provided. The hole formed in the substantially central portion of the task 5100 is penetrated to be vertically movable independently.

The plastic plug 512 is used to preliminarily form the multilayer sheet when the container is formed, and is a cylindrical member having a rounded tip. In the present embodiment, a total of 18 plugs 5 12, three horizontal and six vertical, are provided.

The partition plate 5 13 is a plate-shaped member, and the tip of the box-shaped portion of the compressed air box 5 10 JP02 / 10940

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It is connected to the. The partition plate 513 has a plurality of holes formed therein, each having a diameter substantially equal to the diameter of the shape of the opening of the container. A plug 512 is inserted through this hole so that the partition plate 513 can move up and down.

The support 5 14 is a cylindrical member having a hole formed in the center, and is connected to the vertical direction directly below the partition 5 13.

The base 52 is composed of a base 5220, a support 521, a mold 522 serving as a molding die, and an exhaust hole 5233, and is movable up and down.

The table 52 is composed of a rectangular parallelepiped part, and supports the entire base 52.

The support member 521 is a cylindrical member having a hole formed in the center, and is provided at an upper surface end of a rectangular parallelepiped portion of the base 520. This support 5 21 corresponds to the support 5 14 of the compressed air box 5 10 so that the multilayer sheet 3 挟 is sandwiched between these supports 5 14 and 5 21. Become.

The mold 522 has the same shape as the container, and is fixed by the support member 521. In the present embodiment, a total of 18 dies 522, three in width and six in length, are provided. Exhaust hole ⁵ 2 3, exhaust during pressure forming, performs the function of degassing at a vacuum pressure forming.

The cutting device 60 includes an upper device main body 61 and a lower base 62. The apparatus main body 61 includes a lift main body 61, a support plate 61 1, and a flange retainer 61 2.

The lift main body 6 10 is made of four-layered members for absorbing shock and improving strength. The support plate 611 is a plate-shaped member, and is connected to the lower portion of the lift main body 610 by inserting a T-shaped joining member therein.

The flange retainer 6 12 is composed of a flange retainer 63 composed of four disk-shaped members, and a cutting device 64 passing through the circumference of the flange retainer 63. The flange retainer 6 1 2 presses the molded packaging container 40 from above by means of the flange retainer 6 3 and the container receiver 6 2 2. The notches 4 5 are formed. As shown in Fig. 6, the cutting equipment 6 4 is a cylindrical cutting equipment. It comprises a main body 64, a heat insulating material 641 provided at the tip of the cutting equipment main body, and a cutting blade portion 642. A known material is used for the heat insulating material 641, so that heat generated by the heater 642C described later is not diffused to the surroundings more than necessary. '' The cutting blade 6 4 2 is composed of a cutting blade main body 6 4 2 A with a rectangular cross section, a cutting blade 6 4 2 B with a V-shaped cross section, and a heater 6 built into the cutting blade main body 6 4 2 A. And 4 2 C. The cutting blade main body 642A connects the heat insulating material 641 and the cutting blade 642. The cutting blades 6 4 2 B come into contact with the actually molded packaging container 40 to form the cuts 45. The heater 642C generates heat to heat and melt a predetermined position of the packaging container 40 at the time of forming the actual cut 45, and transmits the heat to the cutting blade 642B.

The base 62 includes a table 62, a support 621, and a container receiving portion 622, and is vertically movable. The table 62 is a rectangular parallelepiped member, and supports the notch device 60 from below. The support 621, which is a cylindrical member having a hole formed in the center, is provided at an end of the upper surface of the table 62. The support 6 2 1 was arranged so as to correspond to the cutting device 6 4 of the flange retainer 6 1 2, and was formed into a shape of a packaging container 40 between the support 6 2 1 and the flange retainer 6 1 2. The multilayer sheet 30 is sandwiched. The container receiving portion 6 2 2 has the same shape as the packaging container 40, and is fixed by the support 6 2 1. In the present embodiment, a total of 18 container receiving portions 6 2 of 3 horizontal and 6 vertical are provided. Two are provided.

As shown in FIG. 4, the transfer device 70 includes a chain gear 71 and a spike chain 72 wound around the chain gear 71, and these chain gear 71 and spike chain 72 are provided. Are arranged on both sides, one pair at a time, with the multilayer sheet 30 interposed therebetween.

The chain gear 71 is connected to rotating means such as a motor and is rotatable. The spike chain 72 has a plurality of spikes each having a pointed tip protruding outside the chain-shaped member wound around the chain gear 71. This spike force pierces the multilayer sheet 30 and fixes the multilayer sheet 30 to the spike chain 72. Soshi The spike chain 72 intermittently conveys the multilayer sheet 30 in the direction of the arrow with the multilayer sheet 30 fixed.

[3] Manufacturing method of packaging container

With reference to FIGS. 4 to 9, a method of manufacturing the packaging container 40 using the manufacturing apparatus 1 will be described. Although the transport device 70 is omitted in FIGS. 5 and 7 to 9, the transport of the multilayer sheet 30 is performed by the transport device 70.

First, as shown in FIG. 4, the multilayer sheet 30 is supplied, the multilayer sheet 30 is fixed to the spike chain 72 of the transport device 70, and the multilayer sheet 30 is fixed to the spike chain 72. In this state, the multilayer sheet 30 is intermittently transported in the direction of the arrow. After that, the multilayer sheet 30 is conveyed to the heating device 80, and the multilayer sheet 30 is heated and melted and softened while the temperature is adjusted by the upper heater 81 and the lower heater 82 of the heating device 80. Yes (heating step).

The softened multilayer sheet 30 is moved between the apparatus main body 51 of the molding apparatus 50 and the base 52 by the transfer device 70, and the multilayer sheet 30 is moved to the upper surface side of the mold 52 (FIG. 5). (Refer to) (Transportation process).

Then, the bases 52 and 62 are simultaneously raised as shown by white arrows, the multilayer sheet 30 is sandwiched between the supports 5 14 and 5 21, and the multilayer sheet 30 is fixed. At this time, the space surrounded by the compressed air box 5110 and the multilayer sheet 30 is a closed space. The plugs 5 12 located in this enclosed space can move independently, so descend so as to come into contact with the multilayer sheet 30, pre-mold the multilayer sheet 30, and pressurize the high-pressure air from the injection holes 51 OA. Is injected and pressed against a mold 522 to form a container (container forming step).

As shown in FIG. 7, the packaging containers 40 formed into the multilayer sheet 30 are simultaneously lowered with the bases 52 and 62 as shown by white arrows, and then the spike chains 7 2 of the transfer device 70 are moved. Thus, the multilayer sheet 30 is conveyed from the forming device 50 to the cutting device 60 with both side ends fixed from above and below. The container 40 formed into the multilayer sheet 30 is, as shown in detail in FIG. JP02 / 10940

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And transported between the base 62 (transportation process).

As shown in FIG. 8, the base container 62 of the packaging container 40 is lifted from the lower side so as to be stored in the container receiving portions 62, and is pressed from above by the flange retainer 612. . The cutting equipment 64 corresponds to the support body 621, and the packaging container 40 is fixed between the apparatus main body 61 and the base 62.

As shown in FIG. 6 in detail, the notch 45 is formed by bringing the notch blade portion 642 into contact with a predetermined position of the flange portion 44, and thereafter, the heater 642C is operated to cut the notch blade 45. The heat generated from the heater 6 42 C is transmitted to 6 42 B, the heat is transmitted from the cutting blade 6 42 B to the flange 44, and the flange 44 is heated and melted. Thereafter, the cutting blade portion 642 is separated from the flange portion 44, and a notch 45 having a V-shaped cross section is formed in the packaging container 40 as shown in FIG. 2 (cutting step).

At the same time as the notch is first formed in the packaging container 40 by the notching device 60, as shown in FIG. 9, in the portion corresponding to the forming device 50 of the multilayer sheet 30, the multilayer sheet 30 is formed. The packaging container 40 is molded.

The packaging container 40 in which the cuts are formed is transported downstream of the manufacturing device 1 by the transport device 70. Thereafter, the packaging container 40 formed into the multilayer sheet 30 is punched and separated as each container, and is completed as a packaging container.

[4] Effect

According to the above-described embodiment, the following effects can be obtained.

(1) Since the forming device 50 and the cutting device 60 are separate devices, the state in which the multilayer sheet 30 is softened by heat remaining in the multilayer sheet 30 at the time of container molding. The cutting 45 can be formed by the cutting device 60 while the solidification is being performed from the beginning, and the sheet after forming the container is held on both sides by the conveying device and positioned without deformation. The accuracy of forming the cuts 4 5 in the flange portions 4 4 can be increased. In addition, in the state where the multilayer sheet 30 is being cooled and solidified, the heated cutting blades 642B for forming the cuts 45 can be used. Notch for heating and melting 02 10940

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Since the notch 45 can be formed by the cutting blade 642B, the cutting blade 6442B can be effectively used.

In addition, since the multi-layer sheet 30 in which the packaging container 40 is formed is transported by including the transport device 70, the packaging container manufacturing device 1 has a simple structure and simple operation. be able to.

(2) The compressed air box 5 10 and the cutting blade 6 4 2 are fixed to the main units 5 1 and 6 1 respectively, and the mold 5 2 2 and the container receiving section 6 2 2 are configured to be movable in the vertical direction. As a result, the multilayer sheet 30 can be sandwiched between the compressed air box 5 10 and the mold 5 2 2 and between the cutting blade 6 4 2 and the container receiving portion 6 2 2. As a result, it is possible to form the cut of the container with a uniform compressive force on the front and back of the multilayer sheet 30.

(3) The mold 5 2 2 and the container receiving portion 6 2 2 are simultaneously moved up and down, so that the multi-layer sheet 30 is simply conveyed by the conveying device 70 and the container is formed and cut into the same multi-layer sheet 30 Can be formed.

(4) By cutting the packaging container 40 at the same time as forming the cut in the cutting process, the heat remaining in the heated thermoplastic resin multilayer sheet is released simultaneously with the punching. Since the portion is reliably cooled and solidified, the one-layer cut 45 can be formed more accurately.

(5) The transport device 70 is arranged so as to intermittently transport the multilayer sheet 30 between upper and lower devices constituting the heating device 80, the forming device 50, and the cutting device 60, respectively. Since the heating step, the container forming step, and the cutting step can be performed intermittently and continuously, the production amount of the packaging container 40 can be increased.

(6) Since the cuts 45 are accurately formed in the inner layer 4OA, the position of the inner peripheral edge of the heat seal between the annular cuts 45 and the lid member 46 is uniform and adhered. Since the inner layer 4 OA of the flange portion 44 is easily peeled off together with the lid member 46, the lid member 46 can be easily peeled off while ensuring the sealing property of the packaging container 40. [5] Modifications

It should be noted that the present invention is not limited to the above-described embodiment, and modifications and improvements as long as the object of the present invention can be achieved are included in the present invention. For example, in the above embodiment, the number of plugs 5 12 is 18, but is not limited to this, and may be set arbitrarily. In addition, the shape of the plug 512 is not limited to the shape of the above embodiment, and can be appropriately set according to the shape of the container to be molded.

Further, although plastic is used as the material of the plug 5 12, other materials such as glass can be adopted without being limited to this.

Furthermore, although the plug assist molding in which the plug 512 is pressed against the multilayer sheet 30 to perform molding is performed, the invention is not limited thereto, and molding can be performed by injecting compressed air from the air injection hole 512A. Moreover, the case of vacuum forming may be used.

In the above-described embodiment, the cutting device 64 is provided over the entire circumference so as to correspond to the flange portion 44 of the packaging container 40.However, the present invention is not limited to this. Good.

Further, the material of the heat insulating material 641 in the above embodiment is not particularly limited, and various known materials having heat insulating properties can be used.

Furthermore, the packaging container 40 was composed of three layers of the inner layer 44A, the intermediate layer 44B, and the outer layer 44C, but is not limited thereto, and may be composed of two layers. It may be composed of layers or more. The shape and structure of each part of the packaging container 40 are not limited to those of the above-described embodiment, and can be appropriately set according to the use of the container.

In addition, specific structures, shapes, and the like when implementing the present invention may be other structures and the like as long as the object of the present invention can be achieved. Industrial applicability

The present invention relates to a packaging container manufacturing apparatus, a packaging container manufacturing method, and a packaging container obtained by this manufacturing method, and can be used for food packaging containers, other packaging containers, and the like.

Claims

The scope of the claims

1. A container forming apparatus for forming a container having a flange at the periphery of an opening by heating and molding the thermoplastic resin multilayer sheet;

A notch device provided adjacent to the container forming device, for forming a notch in the flange portion;

A transport device for holding the both sides of the thermoplastic resin multilayer sheet intermittently and transporting the thermoplastic resin multilayer sheet intermittently.

2. In the packaging container manufacturing apparatus according to claim 1,

The container forming apparatus is provided with a pressurized air box and a molding die portion approaching and separating from the pressurized air box,

The cutting device includes a cutting blade portion that forms a cut and a container receiving portion that approaches and separates from the cutting blade portion,

The said compressed air box and the said cutting blade part are each fixed to the apparatus main body, The manufacturing apparatus of the packaging container characterized by the above-mentioned.

3. In the packaging container manufacturing apparatus according to claim 2,

The apparatus for manufacturing a packaging container, wherein the molding die section and the container receiving section operate simultaneously.

4. In the packaging container manufacturing apparatus according to claim 2 or 3,

The said cutting blade part has a heating means, The manufacturing apparatus of the packaging container characterized by the above-mentioned.

5. The packaging container manufacturing apparatus according to any one of claims 1 to 4, wherein the container forming apparatus is a plug-assist forming apparatus.

6. A container forming step of heating and then thermoforming the thermoplastic resin multilayer sheet to form a container having a flange at the periphery of the opening;

A conveying step of intermittently conveying while holding both sides of the thermoplastic resin multilayer sheet, and a notch step of forming a cut in the flange portion after conveying the thermoplastic resin multilayer sheet, A method for manufacturing a packaging container, wherein the container forming step and the cutting step are performed intermittently and continuously.

7. The method for producing a packaging container according to claim 6,

'The method for manufacturing a packaging container, wherein the container forming step is performed by plug assist molding.

8. In the method for manufacturing a packaging container according to claim 6 or claim 7,

A method of manufacturing a packaging container, characterized in that the container forming step is performed by air pressure forming using a pressurized air box and a molding die that approaches and separates from the pressurized air box.

9. The method for manufacturing a packaging container according to claim 8,

The method for manufacturing a packaging container, wherein the cutting step is performed by a cutting blade portion for forming a cut and a container receiving portion approaching / separating from the cutting blade portion.

10. The method for producing a packaging container according to claim 9,

The method of manufacturing a packaging container, wherein the molding die portion and the container receiving portion operate simultaneously.

11. In the method for manufacturing a packaging container according to any one of claims 6 to 10,

A method of manufacturing a packaging container, comprising punching a container at the same time as or before and after the notch formation in the notch step.

12. A packaging container obtained by the method for producing a packaging container according to any one of claims 6 to 11.