JP2015127233A - Composite paper container and packing/filling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite paper container without additional provision of a drinking straw to stick in which a consumer can use the drinking straw by carrying out an opening operation in drinking, and a packing/filling machine packing and filling the container.SOLUTION: A composite paper container comprises: a paper cylindrical body 5; a lid body 6 which is integrally formed at an upper end of the paper cylindrical body by injection molding means; and a bottom which is folded along a fold and heat-sealed. The lid body 6 is formed by pressure injection of molten plastic into a cavity part which is formed by an inner mold 12 and an outer mold 13 of the injection molding means. A straw pipe 21 is provided in which a mouthpiece side of the straw pipe is positioned at the lid body inner side and the straw pipe is extended to a container bottom.

Description

  The present invention relates to a composite paper container composed of a paper container body for liquid food such as juice and milk and an injection-molded top, and a packaging filling machine for packaging and filling the container.

Packaging containers for filling fluid / liquid foods, such as milk, lactic acid bacteria beverages, tea, juice, soup, alcohols, etc., are formed by a packaging filling machine according to the type of the container, and packed in that container A filled liquid food product is obtained.

In a composite paper container that is formed by injection molding at the top end of the packaging container body and has a top cover that forms the top wall, the packaging filling machine vertically seals a piece of paper that is cut from a web-like packaging material and that has a crease. A paper cylinder is formed, and a lid is integrally formed at one end of the paper cylinder by injection molding, a top is provided with a lid, and a bottom is provided with a paper cylinder. The paper cylinder with a lid is inserted into a bucket of an endless conveyor, is intermittently conveyed in an inverted state, and is filled with liquid food from an opening at the bottom. It is folded along the bottom side fold of the paper tube to form the bottom and heat sealed. The filled composite paper container is taken out upright from the bucket of the conveyor, and the completed packaging container is taken out from the packaging filling machine. (For example, see Patent Literature)
The obtained packaging container becomes a container main body formed of a packaging material and a resin lid (top) formed integrally with the container main body by injection molding. The lid includes, for example, an inclined portion whose diameter is gradually reduced as it goes upward, a neck portion extending upward from the inclined portion, and a closing portion that has a circular shape and closes the upper edge of the neck portion. Furthermore, it is possible to provide a spiral cap on the outer periphery of the neck and attach a screw cap to the neck.
Between the neck part and the closure part, a rupture part is formed by thinning the resin, and a ring / string, flaky or knob-like grip / engagement part formed at a predetermined position of the closure part is formed. When pulled upward, the fracture portion is broken and a spout is formed.
The above-mentioned resin lid (top) formed integrally with the container body by injection molding is opened at the time of drinking and becomes a spout, a direct drinking mouth, a hole for inserting a straw, etc. Demonstrate.

Japanese Patent Laid-Open No. 10-278903 JP 2010-120288 A

In paper containers such as liquid food, especially small paper containers are often drunk with straws, and straws wrapped in bags are attached to the side walls of the container body. However, separately procuring and sticking a bag packaging straw requires a secondary material different from the container, and increases the manufacturing cost. In addition, when drinking, the consumer has to take out the straw from the bag and insert it into the straw hole, which is cumbersome and difficult to use.
The present invention provides a composite paper container that does not require a separate procurement and sticking of a straw, and a consumer can use the straw by an opening operation at the time of drinking, and a packaging filling machine for packaging and filling the container. With the goal.

The packaging and filling machine according to the present invention forms a paper cylinder by vertically sealing a piece of paper cut from a web-like packaging material and provided with a crease for the bottom, and a lid is integrated by injection molding means on the upper end of the paper cylinder. And forming a paper cylinder with a lid having a lid at the top and an opening at the bottom, and transporting the paper cylinder with the lid by a conveying means in an inverted state, and liquid from the opening at the bottom. A packaging and filling machine that fills food, folds along a crease, forms a bottom, heat-seals, erects and takes out the filled composite paper container and carries it out,
The injection molding means inserts the straw tube into the mandrel that rotates intermittently about the axis, the inner mold provided at the tip of the mandrel, and the hole for the straw tube opened in the inner mold at the straw tube insertion station. Pressure injection of molten plastic into the cavity formed by the insertion means, the outer mold provided in the injection molding station and divided into two parts, and the inner mold and the outer mold through the gate provided in the outer mold It consists of an injection part that
The inner mold is fitted to the inner wall of the paper tube up to the upper end of the paper tube, has a mold surface corresponding to the inner surface of the lid, and to the position corresponding to the opening and the lid at the position corresponding to the bottom of the container With a hole for a straw tube,
The outer mold includes a mold surface corresponding to the outer surface of the lid.

In the packaging and filling machine according to a preferred aspect of the present invention, the inner mold is provided with a hollow portion in the outer periphery in the vicinity of the suction port of the inserted straw tube.

The composite paper container according to the present invention is formed integrally with a paper cylinder formed by vertically sealing a piece of paper cut from a web-shaped packaging material and provided with a fold for the bottom, and an upper end of the paper cylinder by injection molding means. The top of the lid, and a bottom that is folded along the crease and heat sealed,
A lid formed by pressure injection of molten plastic into the cavity formed by the inner mold and the outer mold of the injection molding means, and a straw tube located on the inner side of the lid and extending to the bottom of the container It is characterized by providing.

In the composite paper container according to a preferred aspect of the present invention, an interlocking portion with the opening of the lid is provided on the outer periphery of the inserted straw tube in the vicinity of the suction port.

According to the present invention having the above configuration, the following functions are exhibited and advantageous effects are obtained.
The packaging and filling machine according to the present invention forms a paper cylinder by vertically sealing a piece of paper cut from a web-like packaging material and provided with a crease for the bottom, and a lid is integrated by injection molding means on the upper end of the paper cylinder. And forming a paper cylinder with a lid having a lid at the top and an opening at the bottom, and transporting the paper cylinder with the lid by a conveying means in an inverted state, and liquid from the opening at the bottom. This is a packaging and filling machine that fills food, folds along a crease, forms a bottom, heat-seals, and erects and takes out the filled composite paper container.
The packaging container obtained by the packaging and filling machine of the present invention consists of a paper container body formed of a paper packaging material and a resin lid formed integrally with the container body by injection molding. In one embodiment, the lid body has an inclined portion that gradually decreases in diameter as it goes upward, a neck portion that extends upward from the inclined portion, and a circular shape, and a straw tube is built inside the lid body. . In addition to the straw, a closing portion for closing the upper edge of the neck portion may be provided. Furthermore, it is possible to provide a spiral cap on the outer periphery of the neck and attach a screw cap to the neck.
A rupture portion is formed between the neck portion and the closure portion by thinning the resin, and when the grip / engagement portion formed at a predetermined position of the closure portion is pulled upward, the rupture portion is broken and An exit is formed.

The packaging and filling machine of the present invention is characterized in that the injection molding means is opened inside the inner mold by a mandrel that rotates intermittently about the axis, an inner mold provided at the tip of the mandrel, and a straw tube insertion station. The insertion means for inserting the straw tube into the hole for the straw tube, the outer mold provided in the injection molding station and divided into two, and the inner mold and the outer mold through the gate provided in the outer mold Consisting of an injection part that injects molten plastic under pressure into the cavity,
The inner mold is fitted to the inner wall of the paper tube up to the upper end of the paper tube, has a mold surface corresponding to the inner surface of the lid, and to the position corresponding to the opening and the lid at the position corresponding to the bottom of the container And a hole for the straw tube, and the outer mold has a mold surface corresponding to the outer surface of the lid.
When molten plastic is injected under pressure from the injection part through the gate of the outer mold, the cavity formed by the inner mold and the outer mold is filled with the molten plastic. The plastic cools and solidifies.
The inner mold is fitted to the inner wall of the paper tube up to the upper end of the paper tube, has a mold surface corresponding to the inner surface of the lid, and to the position corresponding to the opening and the lid at the position corresponding to the bottom of the container Since the inner surface of the lid is formed from the upper end of the paper tube body, the straw tube can be inserted into the hole from the position corresponding to the bottom of the container to the lid body.
Since the outer mold has a mold surface corresponding to the outer surface of the lid body, the outer surface of the lid body can be formed from the upper end of the paper tube body.
There is no need to procure and stick a straw separately, and the consumer can use the straw by opening operation when drinking.

In a preferred embodiment of the present invention, the inner mold is provided with a hollow portion in the vicinity of the suction port of the inserted straw tube.
In this aspect, when the molten plastic is injected under pressure, the plastic adheres to the outer periphery of the straw tube in the vicinity of the suction port, and the straw tube built in when the lid is opened and pulled out is pulled out.

The composite paper container according to the present invention is formed integrally with a paper cylinder formed by vertically sealing a piece of paper cut from a web-shaped packaging material and provided with a fold for the bottom, and an upper end of the paper cylinder by injection molding means. It has a top part of the lid and a bottom part that is folded and heat-sealed along the crease, and is formed by pressure injection of molten plastic into a cavity formed by the inner mold and the outer mold of the injection molding means. And a straw tube that is positioned on the inner side of the lid and that extends to the bottom of the container.
By opening the lid, since the straw tube is built in the container and inserted to the bottom of the container, the liquid food can be sucked and drunk from the opening of the straw tube.

In a preferred aspect of the present invention, an interlocking portion with the opening portion of the lid is provided on the outer periphery in the vicinity of the suction port of the inserted straw tube.
In this aspect, the interlocking portion in the vicinity of the suction mouth of the inserted straw tube is interlocked with the lid body, and the straw tube incorporated when the lid body is opened and pulled out is also pulled out.
As described above, at the time of drinking, a consumer can drink using a straw by one operation, that is, an opening operation.

It is a schematic sectional drawing of the composite paper container by one Example of this invention. It is the schematic of the example of the injection molding means by the packaging filling machine of this invention. It is the schematic which shows the example of the injection molding process by the packaging filling machine of this invention. It is the schematic of the packaging filling machine which can be used for the packaging filling machine of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
A packaging filling machine for producing a packaging container will be described with reference to FIG.
In the packaging and filling machine, the reel 1 is set in the feeding machine. A packaging container 3 is formed by the packaging material 2 fed out from the set reel 1. The packaging material 2 is, for example, a paper base material, a resin film such as a first polyethylene resin that is coated on the paper base material to constitute the outermost layer, and a second polyethylene that is coated on the paper base material to constitute the innermost layer. It consists of resin films, such as resin, and is made into a laminated structure.

The packaging material 2 is sent to the downstream side and cut into blanks 4 for each length according to the dimensions of the packaging container 3. In the blanks 4, a fold is formed in advance at a position corresponding to the container bottom, and the container bottom is formed by folding along the fold. The paper cylinder 5 having a substantially rectangular cross section is formed by the vertical seal.
The paper cylinder 5 is sent to the next step, and a lid 6 is integrally formed at one end of the paper cylinder 5 by injection molding. As a result, a paper cylinder 7 with a lid having an opening at the bottom is formed. .
In the injection molding means, a mandrel 11, an inner mold, an outer mold, and an injection unit 15 are disposed. The mandrel includes a plurality of mandrels arranged in a radial pattern at equal pitch angles (90 [°] in the present embodiment), and rotates intermittently. Each mandrel is loaded with a loading station 8b for loading the paper cylinder 5, an injection molding station 8c for forming a lid, a discharge station 8d for discharging the paper cylinder 7 with a lid, and a straw tube insertion station. 8a.

The injection molding means includes a mandrel 11 that rotates intermittently about the axis, an inner mold 12 provided at the tip of the mandrel, and a straw tube in a hole for a straw tube that is opened in the inner mold by a straw tube insertion station 8a. Inserting means (not shown) for inserting the inner mold and the outer mold through the outer molds 13 and 13 provided in the injection molding station 8c and divided in two, and the gate 14 provided in the outer mold 13 And an injection part 15 for injecting molten plastic under pressure into a cavity formed by a mold.

As shown in FIG. 2, the inner mold 12 is fitted to the inner wall of the paper cylinder up to the upper end 5 a of the paper cylinder 5, has a mold surface 12 a corresponding to the inner surface of the lid 5, and a position corresponding to the container bottom. Are provided with a straw tube hole (not shown in FIG. 2) up to a position corresponding to the insertion opening 20 and the lid, and the outer molds 13 and 13 are provided with a mold surface 13a corresponding to the outer surface of the lid.
When molten plastic is injected under pressure from the injection part 15 through the gate 14 of the outer mold, the cavity formed by the inner mold and the outer mold is filled with the molten plastic. The plastic cools and solidifies.
The inner mold 12 is fitted to the inner wall of the paper cylinder up to the upper end 5a of the paper cylinder 5, has a mold surface 12a corresponding to the inner surface of the lid 5, and has an insertion opening 20 and a lid at a position corresponding to the bottom of the container. A straw tube hole is provided up to the position corresponding to the body, the inner surface of the lid body 6 is formed from the upper end 5a of the paper tube body 5, and the straw tube is inserted into the hole from the position corresponding to the container bottom to the lid body.
The outer mold 13 includes a mold surface 13 a corresponding to the outer surface of the lid, and the outer surface of the lid can be formed from the upper end 5 a of the paper tube 5.

As shown in FIG. 3, when the molten plastic is injected under pressure from the injection part 15 through the gates 14 of the outer molds 13 and 13, the cavity formed by the inner mold 12 and the outer molds 13 and 13 is melted. Filled with plastic. The plastic cools and solidifies.
The inner mold 12 is fitted to the inner wall of the paper cylinder up to the upper end 5a of the paper cylinder 5, has a mold surface 12a corresponding to the inner surface of the lid 5, and has an insertion opening 20 and a lid at a position corresponding to the bottom of the container. A straw tube hole is provided up to a position corresponding to the body, and a straw tube 21 is inserted into the hole from a position corresponding to the bottom of the container to the lid body, and the inner surface of the lid body 6 is formed from the upper end 5a of the paper tube body 5.
As shown in FIG. 3, the outer mold 13 includes a mold surface 13 a corresponding to the outer surface of the lid, and forms the outer surface of the lid from the upper end 5 a of the paper tube 5.
In a preferred embodiment, the inner mold 12 has a cavity (not shown) in the outer periphery near the suction port of the inserted straw tube. When molten plastic is injected under pressure, the plastic adheres to the outer periphery in the vicinity of the suction port of the straw tube. The straw tube built in when the body is opened and pulled up is also pulled out.

The paper cylinder 7 with the lid is taken out from the mandrel by the pickup device at the discharge station, loaded into an endless conveyor 9 as a conveying device, and sent to a filling process for filling liquid food.

The filling step is formed in the aseptic filling chamber, and the endless conveyor 9 is movably disposed in the aseptic filling chamber, and is transported by the endless conveyor 9 in a state where the paper cylinder 7 with the lid is turned upside down. Is filled.
Sterile air is circulated as a sterile medium in the sterile filling chamber, and the sterile filling chamber is maintained in a sterile state.
The endless conveyor 9 includes a pair of rollers (not shown) that are rotatably arranged at a predetermined distance, a rail that surrounds each roller, is arranged in a track shape, is stretched by each roller, and is attached to the rail. A conveyor as a traveling member disposed so as to freely travel along, a plurality of pairs of buckets and the like that are arranged in parallel in the width direction of the conveyor and formed at a predetermined pitch in the traveling direction. In addition, it can replace with a conveyor as a traveling member, and can also use a chain.
One of the rollers is connected to a conveying motor as a conveying drive unit, and the conveying motor is driven, whereby the endless conveyor 9 is caused to travel intermittently by the distance between adjacent buckets.

A sterilization station is set, and the spray nozzle is arranged to face the paper cylinder 7 with a lid in the sterilization station. The spray nozzle sprays a low-concentration hydrogen peroxide gas as a sterilizing agent toward the inner peripheral surface of the paper cylinder with lid 7 at a predetermined timing, and sterilizes the paper cylinder with lid.
An ultraviolet irradiation station is set adjacent to the sterilization station, and an ultraviolet light is disposed facing the paper cylinder 7 with a lid at the ultraviolet irradiation station. The ultraviolet light irradiates ultraviolet rays toward the inner peripheral surface of the paper cylinder 7 with a lid at a predetermined timing to sterilize the paper cylinder with the lid.

A drying station is set adjacent to the ultraviolet irradiation station, and a hot air nozzle is disposed opposite the paper cylinder with the lid at the drying station. The hot air nozzle injects hot air toward the inner peripheral surface of the paper cylinder with a lid at a predetermined timing to dry the paper cylinder with the lid and remove hydrogen peroxide gas.

The filling nozzle 10 is disposed at the filling station so as to face the paper cylinder 7 with the lid. The bucket holds the paper cylinder 7 with the cover upside down, and the filling nozzle 10 is disposed outside the aseptic filling chamber and is connected to a product tank that stores liquid food. At a predetermined timing, the product tank The liquid food supplied from the container is filled into the paper cylinder with the lid body in an inverted state by a predetermined amount.

In this Embodiment, the packaging container which accommodates liquid foods which need to be refrigerated like milk, a lactic acid bacteria drink, etc. among liquid foods is manufactured.
The packaging container 3 is filled with the liquid food stored in the product tank at a temperature of 2 to 8 [° C.].

A volume flap operation station is set adjacent to the filling station, and the paper cylinder 7 with a lid is pressed from the periphery at the volume flap operation station.
A sealing station is set adjacent to the volume flap operation station, and a folding device and a heat sealing type or ultrasonic type sealing device are arranged at the sealing station. The folding device folds the bottom folding portion of the paper cylinder 7 with a lid projecting from the upper end of the bucket along the fold line, and the sealing device seals the seal fin formed by folding the bottom folding portion.
The bottom folding portion is further folded and heated by a heating device to form a bottom wall, and the packaging container 3 is completed.

A take-out station is set downstream of the seal station, and a take-out machine is arranged at the take-out station. The take-out machine takes out the packaging container 3 from the bucket. At this time, the packaging container 3 is taken out with the lid facing upward. The empty bucket is transported and sent again to the insertion station.

As shown in FIG. 1 (a), the packaging container obtained by the packaging and filling machine of this example includes a paper tube body 5, a lid body 6, and a bottom portion 5b, and the suction side is located inside the lid body. And a straw tube 21 extending to the bottom of the container.
By opening the lid with the opening 6c, the straw tube 21 is built into the container and inserted to the bottom of the container, so that liquid food can be sucked and drunk from the opening of the straw tube.
As shown in FIG.1 (b), the interlocking part 6b with the opening part 6c of a cover body is provided in the outer periphery vicinity of the suction opening of the inserted straw tube 21 at the time of opening by the opening part 6c.
In this aspect, the interlocking portion 22 in the vicinity of the suction mouth of the inserted straw tube 21 is interlocked with the lid body 6, and the straw tube 21 incorporated when the lid body is opened and pulled is also pulled out.
In order to facilitate the drawing out of the straw, the upper portion 6a of the lid 6 can be pulled up so that the opening of the lid 6 can be expanded.
Liquid food can be sucked and drunk from the opening of the straw tube, and at the time of drinking, the consumer can drink using the straw by one operation, that is, opening operation.
As demonstrated in the above examples, there is no need to separately procure and stick a straw, and the consumer can use the straw by an opening operation when drinking.

The present invention is not limited to the embodiments, and various modifications can be made based on the gist of the present invention, and they are not excluded from the scope of the present invention.

The packaging and filling machine according to the present invention can be applied to packaging and filling liquid foods such as juice and milk.

DESCRIPTION OF SYMBOLS 1 Reel 2 Packaging material 3 Packaging container 5 Paper cylinder 6 Lid 11 Cooling means 12 Inner metal mold 13 Outer metal mold 21 Straw pipe

Claims (4)

A piece of paper cut from the web-like packaging material and provided with a bottom fold is vertically sealed to form a paper cylinder, and a lid is integrally formed on the top of the paper cylinder by injection molding means, and the top is A paper cylinder with a lid having an opening at the bottom is formed, and the paper cylinder with the lid is conveyed by a conveying means in an inverted state, and filled with liquid food from the opening at the bottom. A packaging and filling machine that folds along the crease to form the bottom and heat-seal, erects and takes out the filled composite paper container,
The injection molding means includes a mandrel that rotates intermittently about an axis, an inner mold provided at the tip of the mandrel, and a straw tube in a hole for a straw tube that is opened in the inner mold at a straw tube insertion station. A hollow portion formed by the inner mold and the outer mold through a gate provided in the outer mold, an insertion mold for inserting the outer mold, the outer mold provided in the injection molding station and divided into two It consists of an injection part that injects molten plastic under pressure,
The inner mold is fitted to the inner wall of the paper cylinder up to the upper end of the paper cylinder, has a mold surface corresponding to the inner surface of the lid, and the insertion opening and the lid at a position corresponding to the bottom of the container With a hole for a straw tube up to the position corresponding to
A packaging and filling machine, wherein the outer mold includes a mold surface corresponding to the outer surface of the lid. The packaging and filling machine according to claim 1, wherein the inner mold is provided with a hollow portion in the vicinity of the suction port of the inserted straw tube. A paper cylinder formed by longitudinally sealing a piece of paper cut from a web-like packaging material and provided with a fold for the bottom, a top part of a lid integrally formed by injection molding means on the upper end of the paper cylinder, and a crease With a bottom that is folded along and heat sealed,
A lid formed by pressure injection of molten plastic into a cavity formed by the inner mold and the outer mold of the injection molding means; and a bottom of the container located on the inner side of the lid A composite paper container comprising a straw tube extending to the top. The composite paper container of Claim 3 provided with the interlocking | linkage part with the opening part of a cover body in the suction port vicinity outer periphery of this inserted straw tube.