CN102317163A - Method and device for producing liquid food packed in container - Google Patents

Abstract

A method and device for producing a liquid food packed in a container are provided in which gas replacement for filling the head space of the container with an inert gas is efficient and the gas replacement is excellent with respect to profitability, safety, and simplicity. A liquid food packed in a container is produced through a step in which immediately before the opening (16a) of a container bottle filled with a liquid food is capped with a capping machine (14), nitrogen gas is blown by means of a nitrogen gas replacement device (100) toward the opening (16a) from two or three directions making an angle of -5 to 90 DEG with the horizontal plane including the opening (16a) and the gas present in the head space of the container is thereby replaced with the nitrogen gas.

Description

Manufacturing method and device for filling liquid food in container

technical field

The invention relates to a method for manufacturing liquid food filled in a container and a manufacturing device thereof, in particular to a method for manufacturing liquid food filled in a container in which the top space of the container is replaced by an inert gas and a manufacturing device thereof.

Background technique

It has been known that the preservability of the edible oil can be improved by replacing the air in the headspace of the container with an inert gas such as nitrogen after filling the edible oil in a container such as a bottle container.

For the process of using inert gas to replace the air in the headspace of the container, in order to improve the replacement rate, it is best to carry out under an inert gas atmosphere, but this will increase the amount of inert gas used, resulting in increased costs, and when working Personnel are at risk of death when working in an atmosphere of inert gas.

Therefore, in consideration of economy and safety, it is preferable to efficiently perform replacement using a small amount of inert gas, and thus development of such a replacement method is desired.

As such a replacement method for headspace gas, there is, for example, the method disclosed in Patent Document 1. Patent Document 1 is a replacement method for headspace gas in can production and does not relate to bottle containers.

Patent Document 1 discloses and provides a gas displacement sealing method, that is, the method is from the upper direction of the tank (with an inclination angle of 20 to 60° relative to the horizontal plane) After spraying the inert gas, immediately install the tank cover and tighten it. The object of this invention is to perform efficient gas replacement without waste and reliably and easily.

prior art literature

patent documents

Patent Document 1: Japanese Patent Publication No. 57-29331

Contents of the invention

technical problem

However, the gas replacement enclosing method described in Patent Document 1 is expected to improve the gas replacement efficiency under predetermined conditions using a tank container with an open top, but it is difficult to grasp the timing of gas injection. Also, Patent Document 1 does not disclose anything about using a bottle container.

In view of this, it is an object of the present invention to provide a method for manufacturing a liquid food in a container that uses an inert gas to replace the headspace of the container, which has high gas replacement efficiency and is excellent in economy, safety and simplicity of gas replacement, and its method. manufacturing device.

Technical solutions

In order to achieve the above object, the present invention provides a manufacturing method for filling liquid food in a container, which is characterized in that it includes the following process: the opening of the container filled with liquid food is formed at an angle of -5 to 90° relative to the horizontal plane of the opening. The inert gas is blown from two or three directions at an angle to replace the gas in the headspace of the container with the inert gas.

Furthermore, in order to achieve the above object, the present invention provides a manufacturing device for filling liquid food in a container, which is characterized in that it has an inert gas replacement device that is opposite to the opening of the container filled with liquid food. Inert gas is blown from two directions or three directions at an angle of -5 to 90° on the horizontal plane, so as to replace the gas in the headspace of the container with inert gas.

Beneficial effect

According to the present invention, it is possible to provide a container-filled liquid food manufacturing method and a manufacturing device thereof, which have high gas replacement efficiency in replacing the headspace of the container with an inert gas, and are excellent in economy, safety, and simplicity of gas replacement.

Description of drawings

FIG. 1 is a schematic view showing the entire manufacturing process of container filling liquid food including a filling process of filling a bottle container with liquid food and a plug closing process of closing the container plug.

FIG. 2 is an enlarged schematic view showing the plug closing process in FIG. 1 .

Fig. 3 is a perspective view of a nitrogen replacement device according to an embodiment of the present invention.

Fig. 4 is a top view of a nitrogen replacement device according to an embodiment of the present invention.

5 is an upper perspective view of a nitrogen displacement device according to an embodiment of the present invention.

Fig. 6A is a diagram illustrating an angle of blowing nitrogen gas, and is a front view of an opening of a container.

Fig. 6B is a diagram illustrating an angle of blowing nitrogen gas, showing a top view of the opening of the container.

Fig. 7 is a partially enlarged view showing the positional relationship between the nitrogen replacement device and the bolt closing machine.

Fig. 8 is a schematic diagram showing the operation in the plug closing process.

Fig. 9A is a front view of a nitrogen replacement device used in a comparative example.

Fig. 9B is a front view of a nitrogen replacement device used in a comparative example.

Fig. 9C is a front view of a nitrogen replacement device used in a comparative example.

Fig. 10 is a perspective view of a nitrogen replacement device according to another embodiment of the present invention.

FIG. 11 is an upper perspective view of a nitrogen displacement device according to another embodiment of the present invention.

Explanation of main symbols: 10 is the filling room, 11 is the first conveyor, 12 is the filling machine, 13 is the second conveyor, 14 is the closing machine, 14a is the bottle bolt conveyor, 15 is the third conveyor, 16 16a is the opening of the bottle container, 100 and 200 are nitrogen replacement devices, 1 and 201 are the main body, 2 and 202 are the fixing parts, 3A, 3B and 3C are the pipe connection parts, 4 is the rear nozzle, 5 is the In the horizontal hole forming part, 5A and 5B are horizontal holes, 6A, 6B and 6C are nitrogen passages, and 7 is a vertical nozzle.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

(Manufacturing equipment for filling liquid food in containers)

FIG. 1 is a schematic view showing the entire manufacturing process of container filling liquid food including a filling process of filling a bottle container with liquid food and a plug closing process of closing the container plug. Also, FIG. 2 is an enlarged schematic view showing the plug closing process in FIG. 1 .

The manufacturing process of filling the container with liquid food is carried out in the filling chamber 10 .

The manufacturing device of container-filled liquid food includes a first conveyor 11 , a filling machine 12 , a second conveyor 13 , a bolt closing machine 14 , a third conveyor 15 , and a nitrogen replacement device 100 .

The first transfer machine 11 is a disc-shaped transfer mechanism having grooves at a certain interval on the circumference, and uses the groove portion to hold the empty bottle container 16 transferred from the outside of the filling chamber 10 while rotating, and transfers To the next filling machine 12.

The filling machine 12 has a disc-shaped conveying mechanism and a liquid food filling mechanism formed with grooves at a certain interval on the circumference, and uses the groove part to hold the empty bottle container conveyed from the first conveying machine 11 while rotating. 16, and during the bottle container 16 rotates one week, the liquid food is filled by the liquid food filling mechanism, and then transported to the next second transporter 13. The liquid food is filled into the bottle container 16 in a predetermined amount so that the upper portion of the bottle container 16 has a headspace of a predetermined capacity.

The second conveyer 13 is a disc-shaped conveyance mechanism that has grooves at a certain interval on the circumference like the first conveyer 11. While rotating, the groove portion is used to hold the completed liquid that has been conveyed from the filling machine 12. The bottle container 16 of food filling is transported to the next closing machine 14.

The bolt closing machine 14 has a disc-shaped conveying mechanism and a bolt closing mechanism (the bottle bolt conveying machine 14a shown in FIG. 8 ) formed with grooves at a certain interval on the circumference, and uses the groove part to hold the bottle while rotating. The bottle container 16 of liquid food filling that has been carried over from the second conveyor 13 is blown to the opening 16a of the bottle container 16 by the nitrogen replacement device 100 that is arranged on the connecting part of the second conveyor 13 to the bolt closing machine 14. Then, the bottle container 16 is sealed by closing the bottle stopper of the bottle container 16 by the bottle stopper transfer machine 14a, and then it is transferred to the next third transfer device 15.

The 3rd conveyer 15 is like the 1st conveyer 11 with the disc-shaped conveyance mechanism that has the groove at certain intervals on the circumference, utilizes this groove part to grasp the closed bolt conveyed from the bolt closing machine 14 while rotating. Bottle container 16 (container fills liquid food) of bottle stopper, and it is conveyed to the outside of filling chamber 10.

(nitrogen replacement device)

Fig. 3 is a perspective view of a nitrogen replacement device according to an embodiment of the present invention, Fig. 4 is a top view thereof, and Fig. 5 is a perspective view of an upper part thereof.

The nitrogen replacement device 100 is composed of a main body 1 and a fixing part 2 that fixes the main body 1 at a predetermined position, and passes through the opening 16a of the bottle container filled with liquid food at a level of -5 to 90 degrees relative to the opening. The nitrogen gas is blown from two directions or three directions at an angle of °, and the gas in the headspace of the container is replaced by nitrogen gas.

The main body part 1 has: pipe connection parts 3A, 3B for connecting nitrogen gas supply pipes; rear side nozzle 4 for blowing nitrogen gas from the rear side at an angle of -5 to 90° with respect to the horizontal plane of the opening 16a of the bottle container The horizontal hole forming part 5 is formed with circular horizontal holes 5A, 5B for blowing nitrogen gas from the lateral direction at an angle of -5 to 90° with respect to the horizontal plane of the opening 16a of the bottle container.

The pipe connecting portion 3A and the rear nozzle 4 are connected through a nitrogen gas passage 6A formed inside the main body 1 , and the pipe connecting portion 3B and the horizontal holes 5A, 5B are connected through a nitrogen gas passage 6B formed inside the main body 1 . .

Preferably, a throttling mechanism for adjusting the flow rate of blown nitrogen gas is provided on the rear nozzle 4 . Furthermore, it is preferable to connect different nitrogen gas supply sources to the pipe connection parts 3A, 3B, respectively, so that the flow rate of nitrogen gas blown in from the rear side nozzle 4 and the flow rate of nitrogen gas blown in from the horizontal holes 5A, 5B can be independently adjusted.

6A and 6B are diagrams illustrating the blowing angle of nitrogen gas. FIG. 6A is a front view of the opening of the container, and FIG. 6B is a plan view of the opening of the container.

When nitrogen is blown in, it is from two directions at an angle of -5 to 90° with respect to the horizontal plane of the opening 16a of the bottle container, that is, according to the rear side direction of the rear side nozzle 4 and according to the lateral direction of the horizontal hole (5A and/or 5B). in both directions. Moreover, on this basis, the front side direction according to the horizontal hole or the front side direction according to the front side nozzle can also be added, so that it can be carried out from three directions in total. Alternatively, it can also be performed from two directions: the rear direction according to the rear nozzle 4 and the front direction according to the horizontal hole or the front nozzle.

The nitrogen blowing angle can be changed by changing the formation position of the rear nozzle 4 or the horizontal holes 5A, 5B, the direction of the nitrogen passage 6B, the installation position of the nitrogen replacement device 100, and the like.

Here, the nitrogen blowing angle with respect to the horizontal plane of the opening 16a of the bottle container should be -5 to 90° with respect to the horizontal plane (0°) of the opening 16a, preferably 0 to 90°, more preferably The preferred angle is 5-70°, more preferably 5-60°, most preferably 5-40° (see FIG. 6A ).

In particular, for the blowing angle from the rear side direction, an angle greater than 0° relative to the horizontal plane (0°) of the opening is preferred. And preferably, the angle of at least one of the two directions and the three directions is greater than 0°, more preferably, all the angles of the two directions and the three directions are greater than 0°.

And, as shown in Figure 6B, on the opening level of the container, when the center of the opening of the bottle container is used as the center point, and the advancing direction (y in the figure) of the bottle container is used as the reference (0°), "relative to the advancing The rear direction of the direction" (a in the figure) refers to the direction of 135 to 225°, and the "lateral direction relative to the forward direction" (b in the figure) refers to the direction of 45 to 135° and 225 to 315°, " The "front direction" (c in the figure) with respect to the advancing direction refers to directions of 0° to 45° and 315° to 360°. However, among the angles serving as boundaries, 135° and 225° are included in the definition of the rear direction, and 45° and 315° are included in the definition of the lateral direction. The blowing angle from the rear side is preferably 150 to 210°, more preferably 160 to 200°. The blowing angle from the lateral direction is preferably 60-130° and/or 230-300°, more preferably 75-125° and/or 235-285°. The blowing angle from the front side is preferably 10 to 44° and/or 316 to 350°.

And, the angle between the two directions or the angle between the three directions, that is, the connection between the point of the outlet center point projected in one direction and the opening center point of the bottle container on the horizontal plane of the opening of the container The angle formed by the line and the connecting line between the center point of the outflow outlet and the center point of the opening of the bottle container projected on the horizontal plane of the container's opening in one of the remaining directions (when there are two remaining directions, project the remaining two directions respectively) (greater than 0° and less than or equal to 180°), preferably 40-180°, more preferably 45-150°, more preferably 45-135°, most preferably 50-120°. For example, when the blowing angle in the rear direction is 180° and the blowing angle in the lateral direction is 90°, the angle formed by these two directions is 90°; When the blowing angle in the side direction is 10°, the angle formed by these two directions is 160°. When there are three directions or a plurality of outlets in a specific direction, in the formed angles, preferably more than one is in the above-mentioned range, more preferably two or more are in the above-mentioned range, and more preferably all angles are within the above range.

(Manufacturing method of container filling liquid food)

Next, a method of manufacturing a container-packed liquid food will be described.

The manufacture of the container-filled liquid food is performed by the operation of each device and mechanism constituting the above-mentioned container-filled liquid food manufacturing apparatus. That is, the manufacturing method of container filling liquid food mainly comprises: the technology that empty bottle container 16 is carried to filling machine 12 by first conveyer 11; Fill liquid food to bottle container 16 by filling machine 12, form The technology of head gap; The container 16 that will complete liquid food filling is carried to the technology of bolt closing machine 14 by the second carrier 13; Blow into the opening 16a of bottle container 16 by nitrogen gas replacement device 100, nitrogen is blown into the opening 16a of bottle container 16. The process of replacing the gas in the headspace with nitrogen; the process of sealing the bottle container 16 by the closing machine 14; transporting the closed bottle container 16 of the bottle container 16 to the outside of the filling chamber 10 by the third transporter 15 (container filling) liquid food) approx.

In particular, the process of replacing the gas in the headspace of the container with nitrogen by the nitrogen replacement device 100 and the cap closing device 14 is a characteristic part of the present invention, and will be described in detail below.

Fig. 7 is a partially enlarged view showing the positional relationship between the nitrogen replacement device and the bolt closing machine. In addition, FIG. 8 is a schematic diagram showing the operation in the plug closing process.

In the process of replacing with nitrogen, nitrogen is blown from two or three directions to the opening of the container filled with liquid food at an angle of -5 to 90° relative to the horizontal plane of the opening, thereby converting the The gas in the headspace of the vessel was replaced with nitrogen.

One of the two directions, as shown in Figure 2 or Figure 7, is preferably along the rear side of the container (using the rear nozzle 4). The remaining one of the two directions is preferably in the lateral or frontal direction of the container, more preferably in the lateral direction of the container (using the lateral holes 5A, 5B).

The three directions are the rear direction, the lateral direction and the front direction of the container.

Here, the definitions and preferred ranges of "the angle of -5 to 90° with respect to the horizontal plane of the opening", "rear direction", "lateral direction" and "front direction" are the same as those described above.

One or more than two nitrogen flow outlets are provided along two directions or one of the three directions. For example, in the nitrogen replacement device 100 shown in FIGS. 3 to 5 , there is one outlet in the rear direction (rear nozzle 4 ) and two outlets in the lateral direction (horizontal holes 5A, 5B).

FIG. 8 shows a state in which the bottle container 16 is closed by the bottle container 16 being closed by the bottle container 16 by the bottle bottle transporter 14a which grips and moves downward the bottle container 16b while the bottle container 16 is moving from the right side to the left side of the drawing. The blowing of nitrogen gas is carried out while moving from FIG. 8 (middle figure) to FIG. 8 (left figure), and from the viewpoint of economy and safety, it is preferable to close the bottle stopper of the container immediately after blowing in. And, more preferably, the bottle stopper of container is closed while blowing. Here, closing the bottle stopper of the container immediately after blowing in means that the time from blowing nitrogen gas to closing the stopper of the container is almost zero, and the time from blowing nitrogen gas to closing the stopper of the container is preferably 1 second. within 0.5 seconds, more preferably within 0.3 seconds.

In addition, the bottle container 16 is preferably conveyed to the nitrogen blowing position at a speed of 50 to 250 bottles/minute, more preferably at a speed of 100 to 200 bottles/minute.

In Fig. 7, the opening 16a of the bottle container represented by the dotted line is the position where nitrogen gas is blown into, and the distance X between the center of the opening 16a and the front end (outlet) of the rear nozzle 4 is preferably 1 to 10 cm, more preferably It is 3-8cm.

The amount of nitrogen blown from the rear side is preferably 5 to 80 liters/minute, more preferably 15 to 60 liters/minute, more preferably 30 to 60 liters/minute, and most preferably 45 to 60 liters/minute. In addition, the area of the outlet of the rear nozzle at this time is preferably 45 to 1000 mm ² , more preferably 45 to 400 mm ² , still more preferably 50 to 200 mm ² , and most preferably 50 to 100 mm ² . When blowing in this range, replacement can be performed more effectively, and the liquid food in the container can be prevented from splashing out.

In addition, the total amount of nitrogen blown from the lateral and/or front direction is preferably 30 to 450 liters/minute, more preferably 30 to 350 liters/minute, more preferably 30 to 250 liters/minute, and most preferably 30 to 450 liters/minute. Preferably it is 60 to 250 liters/minute. In this case, the area of the outlet of each nozzle is preferably 45 to 1000 mm ² , more preferably 50 to 400 mm ² , still more preferably 50 to 200 mm ² , and most preferably 50 to 100 mm ² .

From the aspect of suppressing the amount of oxygen absorbed by the contained liquid food, the blowing amount of nitrogen gas is preferably such that the oxygen concentration in the headspace of the bottle container 16 reaches 9 volume % or less, more preferably 7 volume % or less, more preferably 5 volume % or less. vol% or less, especially preferably 4 vol% or less.

(inert gas)

In the above-mentioned embodiment, although nitrogen gas was described as an example, one or more inert gases selected from nitrogen gas, argon gas, helium gas, and carbon dioxide gas may be used. Nitrogen is preferred in terms of versatility and cost.

(container)

As the container, various containers can be used, but for example, the bottle container 16 is preferably used. The bottle container 16 has a bottle stopper, and is sealed with a headspace replaced by an inert gas after the liquid food is filled. At this time, preferably, before the liquid food is filled in the container, inert gas is blown in to complete the replacement of air and inert gas.

The bottle container 16 is a so-called bottle-shaped container, and it is preferable to use a container whose cross-sectional diameter of the headspace is smaller than that of a container filled with liquid food in terms of function and appearance.

As the bottle container 16, for example, a bottle container having a capacity of 100 to 1800 g of liquid food can be used. The headspace is kept above a certain capacity, so as to prevent liquid food from splashing out when the bottle stopper is opened. For example, the ratio of the capacity (mL) of the headspace to the amount (g) of the accommodated liquid food is 0.02˜0.1 (mL/g).

As the material of the container, for example, resins such as polyethylene terephthalate (PET), polyethylene (PE), vinyl chloride (PVC), and polylactic acid; glass; metal, and the like can be used as materials. A resin-based plastic container or glass container is preferable, and a plastic container is particularly preferable. Furthermore, a container having a multilayer structure in which a film is combined on the above-mentioned container can also be used.

For plastic containers, blow-molded plastic containers are preferred in order to maintain the shape of the container. Furthermore, in order to reduce the volume at the time of disposal, it is more preferable to use a container that can be deformed by pressurization or the like.

(liquid food)

In this embodiment, there is no particular limitation on the type of liquid food that can be used. There are no particular limitations as long as the liquid food has fluidity at 10 to 25°C. For example, edible oils, sauces, and beverages may be mentioned, but edible oils are preferred.

There is no particular limitation on the kind of edible oil. For example, soybean oil, rapeseed oil, oleic rapeseed oil, corn oil, sesame oil, sesame salad oil, shiso oil, linseed oil, peanut oil, safflower oil, high oleic red Flower oil, sunflower oil, high oleic sunflower oil, cottonseed oil, grapeseed oil, macadamia nuts oil, hazelnut oil, pumpkin seed oil, walnut oil, camelia oil, tea seed oil , flax oil, borage oil, olive oil, rice oil, rice bran oil, wheat germ oil, palm oil, palm kernel oil, coconut oil, cocoa butter, butter, lard, chicken fat, milk fat, fish oil , seal oil, seaweed oil, these oils that have become less saturated through variety improvement, and their mixed oils, transesterified oils, hydrogenated oils, separated oils, etc.

In addition, L-ascorbic acid or L-ascorbic acid derivatives, vitamin E, tocopherols, ascorbic acid fatty acid esters, lignans, coenzyme Q, phospholipids, orizanol, phytosterols, and diglycerides may be added to the edible oil. , catechins, polyphenols, antioxidants such as tea extracts, or other additives such as emulsifiers.

As an emulsifier, for example, polyglycerin fatty acid ester, sucrose fatty acid ester, sorbitan fatty acid ester, polysorbate, condensed castor oil fatty acid ester, monoglycerin fatty acid ester, etc., or soybean lecithin, Egg yolk lecithin, soybean lysolecithin, egg yolk lysolecithin, enzyme-treated egg yolk, saponins, phytosterols, milk fat globule membrane and other emulsifiers.

Fats and oils added with one or more substances selected from antioxidants and emulsifiers are preferred.

(Manufacturing apparatus and manufacturing method of container filling liquid food according to other embodiments)

Hereinafter, the manufacturing apparatus and manufacturing method of the container filling liquid food of other embodiment other than embodiment of this invention mentioned above are demonstrated. In this embodiment, since the nitrogen replacement device is different from the embodiment of the present invention described above, the description will focus on the configuration of the nitrogen replacement device.

This embodiment is particularly applicable to a case where the bottle container is large and the capacity of the headspace is large. For example, even in the case of a bottle container with a capacity of 1000 g (capacity of the headspace: 70 to 85 ml), nitrogen substitution can be effectively performed.

Fig. 10 is a perspective view of a nitrogen replacement device according to another embodiment of the present invention, and Fig. 11 is a top sectional view thereof.

The nitrogen replacement device 200 is composed of a main body 201 and a fixing part 202 for fixing the main body 201 at predetermined positions, and has basically the same structure as the aforementioned nitrogen replacement device 100, but the difference is that the main body 201 is further provided with vertical nozzles. 7.

The main body 201 further has a pipe connection portion 3C for connecting a nitrogen gas supply pipe and a vertical nozzle 7 for blowing nitrogen gas from above at an angle of 80 to 90° with respect to the horizontal plane of the opening 16a of the bottle container. The angle is preferably 85 to 90° with respect to the horizontal plane of the opening 16a.

The pipe connecting portion 3C and the vertical nozzle 7 are connected by a nitrogen gas passage 6C formed inside the main body portion 201 .

Preferably, a throttling mechanism for adjusting the flow rate of blown nitrogen gas is provided on the vertical nozzle 7 . And preferably, different nitrogen gas supply sources are respectively connected to the pipe connection parts 3A, 3B, and 3C, and the flow rate of nitrogen gas blown in from the rear nozzle 4 and the flow rate of nitrogen gas blown in from the horizontal holes 5A, 5B can be independently adjusted respectively. The nitrogen flow rate blown into by the vertical nozzle 7.

The process of blowing nitrogen gas through the vertical nozzle 7 is performed before the process of blowing nitrogen gas from two directions or three directions through the aforementioned rear nozzle 4 or the like. Specifically, it is preferably performed within 10 seconds, more preferably within 5 seconds, and still more preferably within 3 seconds before the nitrogen gas is blown from two or three directions from the rear nozzle 4 or the like. . Most preferably, within 1 second. Also, from the point of view of the blowing position, it is preferably a position 0.5 to 15 cm before the position where the rear nozzle 4 etc. blows in from two directions or three directions, more preferably a position 0.5 to 10 cm before, and more preferably It is the position before 0.5-7cm. The opening 16a of the bottle container shown by the dashed-dotted line in FIG. 11 is a position for blowing nitrogen gas.

The distance (greater than 0 cm) between the nozzle tip of the vertical nozzle 7 and the opening 16a of the bottle container is preferably within 5 cm, more preferably within 1 cm, and particularly preferably within 0.5 cm.

Preferably, the bottle container 16 is conveyed to the position where nitrogen gas is blown from the vertical nozzle 7 at a speed of 50-250 bottles/minute, more preferably at a speed of 100-200 bottles/minute.

The amount of nitrogen blown from the upper direction by the vertical nozzle 7 is preferably 5 to 400 liters/minute, more preferably 30 to 300 liters/minute, especially preferably 50 to 200 liters/minute, and most preferably 100 liters/minute. ~150 liters/min. In addition, the area of the outlet of the vertical nozzle 7 at this time is preferably 45 to 1000 mm ² , more preferably 45 to 400 mm ² , especially preferably 50 to 200 mm ² , and most preferably 50 to 100 mm ² . By blowing in this range, replacement|displacement can be performed more effectively, and the liquid of the liquid food in a container will not be splashed.

[Effects of Embodiments of the Present Invention]

According to the embodiment of the present invention, it can be provided that the gas replacement efficiency of replacing the headspace of the container with an inert gas is good (in a preferred mode, the oxygen concentration in the headspace is below 9% by volume), and it is comparable to that carried out under an inert gas atmosphere. A method for manufacturing a container-filled liquid food and an apparatus for manufacturing the same, which are superior in economy and safety of gas replacement compared to other times. In addition, it is possible to provide a container-filled liquid food manufacturing method and a manufacturing apparatus thereof excellent in the simplicity of the process of replacing with an inert gas.

Next, the present invention will be described by examples, but the present invention is not limited to these examples.

Example

In the filling chamber 10 shown in FIG. 1 , Nisshin Olive Oil is filled by a filling machine 12 in a bottle container 16 (capacity of 400 g) made of polyethylene terephthalate (PET). The rapeseed oil manufactured by the company (Co., Ltd.), and then using the nitrogen replacement device (Fig. 3, Fig. 9A-9C), according to the conditions described in the following Tables 1-4, in order to reduce the headspace (30.6mm) of the bottle container 16 (plastic) ml) of air is replaced with nitrogen, nitrogen is blown into the opening 16a of the bottle container 16, and the bottle stopper is closed immediately (within 0.3 seconds) by the bottle stopper handling machine 14a to seal.

For Examples 1-11 and Comparative Examples 1-8, the oxygen concentration (%) in the headspace immediately after sealing (within 10 minutes after sealing) was measured by the following method, and the measurement results are shown in Tables 1-4. The number of bottles measured was 20 bottles each in Example 1 and Comparative Examples 1-3, and 10 bottles each in Examples 2-11 and Comparative Examples 4-8.

<Measuring method of oxygen concentration in the headspace>

For the above-mentioned immediately sealed container to be measured, a suction needle connected to a gas suction tube to be measured is inserted from above the cap, and the headspace gas collected from there is sent to the detection unit, and the gas is measured. The instrument used for measurement is OXYGEN METERRO-102 manufactured by Iijima Denshi Kogyo Co., Ltd. The amount of gas inhaled at one time is 3ml. This operation was repeated three times, and the gas inhaled for the third time was used for measurement.

[Table 1]

Table 1 Nitrogen replacement conditions and results

※<> indicates the number of nozzles or holes

Note 1: Block the horizontal hole 5B, only blow in from 5A

Note 2: Block the horizontal hole 5A, only blow in from 5B

In Examples 1 to 11 and Comparative Examples 1 to 8, the nitrogen blowing angle was adjusted as follows.

That is, in FIG. 3, for the rear side nozzle 4, when projected onto the opening horizontal plane of the container, the angle relative to the advancing direction is about 167°, the angle relative to the horizontal plane is about 34°, and the area of the outlet is about 79mm ² ; for the circular horizontal hole 5A, the angle relative to the forward direction when projected onto the horizontal plane of the opening of the container is about 122°, the angle relative to the horizontal plane is about 30°, and the area of the outlet is about 79mm ² ; For the circular horizontal hole 5B, when projected onto the horizontal plane of the opening of the container, the angle relative to the forward direction is about 90°, the angle relative to the horizontal plane is about 30°, and the area of the outlet is about 79mm ² .

That is, in FIG. 9A , for the circular horizontal holes 201A to 201D, the angles relative to the forward direction when projected onto the horizontal plane of the opening of the container are approximately 98°, 92°, 88°, and 82°, respectively. The angles of the horizontal plane were all about 30°, and the areas of the outlets were all about 79 mm ² .

That is, in FIG. 9B , for the horizontally elongated horizontal hole 301, when projected onto the horizontal plane of the opening of the container, the angle with respect to the forward direction is about 90°, the angle with respect to the horizontal plane is about 50°, and the angle of the outlet is about 90°. The area is about 679mm ² .

That is, in FIG. 9C, for the circular horizontal hole 401A, when projected onto the horizontal plane of the opening of the container, the angle relative to the advancing direction is about 98°, the angle relative to the horizontal plane is about 45°, and the area of the outlet is About 79mm ² ; For the horizontally elongated horizontal hole 401B, when projected onto the opening horizontal plane of the container, the angle relative to the forward direction is about 90°, the angle relative to the horizontal plane is about 45°, and the area of the blowing outlet is about 45°. is 279mm ² ; for the circular horizontal hole 401C, when projected onto the horizontal plane of the opening of the container, the angle relative to the forward direction is about 82°, the angle relative to the horizontal plane is about 45°, and the area of the outlet is about 79mm ² .

According to Table 1, in Example 1 in which nitrogen gas was blown from both directions of the rear side nozzle and the lateral hole, it was confirmed that the headspace was effectively replaced with nitrogen gas.

On the other hand, although the total blowing amount of nitrogen gas is the same as that of Example 1, in Comparative Examples 1 to 6 in which the nitrogen gas is blown only from one direction of the horizontal hole, it is confirmed that the number of holes or holes used as gas outlets can be improved immediately. shape, and cannot be effectively replaced by nitrogen.

In addition, in Example 1, there was no phenomenon that the oil in the container splashed out due to the injection of nitrogen gas.

[Table 2]

Table 2 Nitrogen replacement conditions and results

※<> indicates the number of nozzles or holes

[table 3]

Table 3 Nitrogen replacement conditions and results

※<> indicates the number of nozzles or holes

According to Table 2, in Examples 2 to 9 in which nitrogen gas was blown from both directions of the rear side nozzle and the horizontal hole, it was confirmed that the headspace was effectively replaced with nitrogen gas.

In addition, in Examples 2 to 9, there was no splashing of the oil in the container due to the injection of nitrogen gas.

And, it was confirmed that when the nitrogen flow rate of the rear nozzle was fixed at 55 L/min, as the nitrogen flow rate from the horizontal hole increased, the headspace was more effectively replaced by nitrogen gas, but when the nitrogen flow rate from the horizontal hole reached When the flow rate is increased above 245 L/min, the nitrogen replacement rate hardly changes.

On the other hand, according to Table 3, in Comparative Examples 7 to 8 in which nitrogen gas was blown only from one direction of the horizontal hole, it was confirmed that even if the flow rate of nitrogen gas was increased, there was little possibility of improving the nitrogen replacement rate.

[Table 4]

Table 4 Nitrogen replacement conditions and results

※<> indicates the number of nozzles or holes

According to Table 4, in Examples 10 to 11 in which nitrogen gas was blown from both directions of the rear side nozzle and the horizontal hole, it was confirmed that the headspace was effectively replaced with nitrogen gas.

In addition, in Examples 10 to 11, there was no splashing of the oil in the container due to the injection of nitrogen gas.

Also, it was confirmed that the slower the nitrogen replacement rate, the more efficiently the headspace is replaced with nitrogen.

In the filling chamber 10 shown in FIG. 1 , the bottle container 16 (capacity of 400 g) made of polyethylene terephthalate (PET) is filled by the filling machine 12. Co., Ltd. manufactured rapeseed oil, then use a nitrogen replacement device (3 nozzles A to C are provided, each nozzle has a blowing area of about 79mm ² ), according to the conditions recorded in Table 5, the bottle container 16 (plastic ) in the headspace (30.6 ml) was replaced with nitrogen. The oxygen concentration in the headspace was measured in the same manner as in Example 1 and the like. The number of measuring bottles was 10 bottles each.

[table 5]

Table 5 Nitrogen replacement conditions and results

※Angle relative to the direction of travel when projected onto the horizontal plane of the opening of the vessel

According to Table 5, in Examples 12 to 14 in which nitrogen gas was blown from 2 to 3 directions of the rear side, the lateral direction, and the front side direction, it was confirmed that the headspace was effectively replaced with nitrogen gas.

In addition, in Examples 12 to 14, there was no splashing of the oil in the container due to the blowing of nitrogen gas.

Next, in the filling chamber 10 described in FIG. 1, in a plastic bottle container 16 (capacity of 1000 g) manufactured by laminating ethylene-vinyl chloride alcohol copolymer (EVAL) resin and polyolefin resin, the The filling machine 12 is used to fill the rapeseed oil manufactured by Nissin Oliver Co., Ltd., and then use the nitrogen replacement device (Figure 3 or Figure 10), according to the conditions recorded in the following Table 6, in order to fill the bottle container 16 The air in the headspace (77.1ml) is replaced with nitrogen, and the nitrogen is blown into the opening 16a of the bottle container 16, and immediately (within 0.3 seconds after blowing in from the rear nozzle 4 and the horizontal holes 5A, 5B) by the bottle stopper transporter 14a ) close the bottle stopper and seal it.

For Examples 15 to 18, the oxygen concentration (%) in the headspace immediately after sealing (within 10 minutes after sealing) was measured by the method described above, and the measurement results are shown in Table 6. The number of measuring bottles was 10 bottles each.

In Examples 15 to 18, the nitrogen blowing angle was adjusted as follows.

That is, in FIG. 3 and FIG. 10, for the rear side nozzle 4, when projected onto the horizontal plane of the opening of the container, the angle relative to the advancing direction is about 167°, the angle relative to the horizontal plane is about 34°, and the angle of the outlet is about 167°. The area is about 79mm ² ; for the circular horizontal hole 5A, when projected onto the opening horizontal plane of the container, the angle relative to the forward direction is about 122°, the angle relative to the horizontal plane is about 30°, and the area of the outlet is about 30°. is 79mm ² ; for the circular horizontal hole 5B, the angle relative to the forward direction when projected onto the horizontal plane of the opening of the container is about 90°, the angle relative to the horizontal plane is about 30°, and the area of the outlet is about 79mm ² .

That is, in FIG. 10 , the vertical nozzle 7 forms an angle of about 90° with respect to the horizontal plane of the opening of the container, and the area of the outlet is about 79 mm ² .

Nitrogen blowing process using the vertical nozzle 7, within 0.5 seconds before blowing through the rear nozzle 4 and the horizontal holes 5A, 5B, and 6.5 cm before the position where the rear nozzle 4 and the horizontal holes 5A, 5B are blown carried out at the position.

When nitrogen gas was blown, the distance between the nozzle tip of the vertical nozzle 7 and the opening 16a of the bottle container was 0.2 cm.

[Table 6]

Table 6 Nitrogen replacement conditions and results

※<> indicates the number of nozzles or holes

According to Table 6, in Example 15 in which nitrogen gas was blown from the rear side direction and lateral direction to the container having a capacity of 1000 g, it was confirmed that the headspace was effectively replaced with nitrogen gas. In addition, in Examples 16 to 18 in which nitrogen gas was blown from the upper side to the container with a capacity of 1000 g, and nitrogen gas was blown from the rear side and the lateral direction, it was confirmed that the headspace was effectively replaced with nitrogen gas.

Claims (18)

1. a container is loaded the manufacturing approach of food liquid; It is characterized in that comprising following technology: the angle that is-5～90 ° to the opening of the container that is filled with food liquid with the horizontal surface with respect to this opening is blown into unreactable gas from both direction or three directions, becomes said unreactable gas with the gas replacement with the bottom clearance of said container.

2. container as claimed in claim 1 is loaded the manufacturing approach of food liquid; It is characterized in that in said both direction or said three directions, in the angle that forms between the angle that forms between this both direction or these three directions is 40～180 ° more than one.

3. according to claim 1 or claim 2 container is loaded the manufacturing approach of food liquid, it is characterized in that a direction in the said both direction is a rear direction with respect to the working direction of said container.

4. container as claimed in claim 3 is loaded the manufacturing approach of food liquid, it is characterized in that in the said both direction all the other directions with respect to the working direction of said container be laterally or the front side to.

5. according to claim 1 or claim 2 container is loaded the manufacturing approach of food liquid, it is characterized in that said three directions with respect to the working direction of said container be rear direction, laterally and the front side to.

6. load the manufacturing approach of food liquid like any described container in the claim 1 to 5, it is characterized in that unreactable gas flow export said both direction or three directions, that be used to be blown into unreactable gas is more than one or two.

7. load the manufacturing approach of food liquid like any described container in the claim 1 to 6, it is characterized in that being blown into the bolt of closing said container behind the said unreactable gas at once, perhaps when being blown into said unreactable gas, close the bolt of said container.

8. load the manufacturing approach of food liquid like any described container in the claim 3 to 7, it is characterized in that said container is moved to the position that is blown into said unreactable gas with 50～250 bottles/minute speed.

9. load the manufacturing approach of food liquid like any described container in the claim 3 to 8, the amount of being blown into of the said unreactable gas that it is characterized in that being blown into from said rear direction is 5～80 liters/minute.

10. like the manufacturing approach of claim 8 or 9 described containers filling food liquids, it is characterized in that with respect to said working direction, is 30～450 liters/minute from horizontal and/or front side to the amount of being blown into of the said unreactable gas that is blown into.

11. the manufacturing approach like any described container filling food liquid in the claim 1 to 10 is characterized in that being blown into said unreactable gas, so that the oxygen concentration in the bottom clearance of said container reaches below the 9 volume %.

12. the manufacturing approach like any described container filling food liquid in the claim 1 to 11 is characterized in that said unreactable gas is more than one gases of from argon gas, helium, nitrogen and carbon dioxide, selecting.

13. load the manufacturing approach of food liquid like any described container in the claim 1 to 12; It is characterized in that said container is the bottle container through blow molding, the container profile diameter of said bottom clearance is less than the container profile diameter of the part of loading said food liquid.

14. the manufacturing approach like any described container filling food liquid in the claim 1 to 13 is characterized in that said food liquid is a cooking oil.

15. load the manufacturing approach of food liquid like any described container in the claim 1 to 14; It is characterized in that before being blown into the technology of said unreactable gas from said both direction or three directions, comprising following technology: the angle that is 80～90 ° to the opening of said container with the horizontal surface with respect to said container is blown into said unreactable gas from a direction.

16. a container is loaded the manufacturing installation of food liquid; It is characterized in that having the inert gas replacement device; This inert gas replacement device has first and second and is blown into mechanism; Perhaps have first to the 3rd and be blown into mechanism, this is blown into mechanism is-5～90 ° with angle from the horizontal surface with respect to this opening to the opening of the container that is filled with food liquid and is blown into unreactable gas from both direction or three directions.

17. container as claimed in claim 16 is loaded the manufacturing installation of food liquid, it is characterized in that having the loading machine of loading said food liquid and the Guan Shuanji that closes the opening of said container.

18. manufacturing installation like claim 16 or 17 described containers filling food liquids; It is characterized in that said inert gas replacement device has the 4th and is blown into mechanism, the 4th is blown into mechanism is 80～90 ° angle to the opening of said container and is blown into said unreactable gas from a direction with the horizontal surface with respect to this opening.

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