JP4319729B2 - Cooling container and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container for cooling a liquid material and solidifying it into an arbitrary shape, which can be repeatedly used after the solidified material is taken out, and a method for manufacturing the same. It is mainly used as a container for making frozen confectionery and ice to be edible by cooling in a refrigerator at home.
[0002]
[Prior art]
Conventionally, a container for cooling liquid contents and solidifying into an arbitrary shape, and after taking out the solidified substance, as a cooling container that can be repeatedly used, a metal container such as aluminum, or polypropylene There were resin containers made of polyethylene or polyethylene.
[0003]
Metal containers are excellent in thermal conductivity and have the advantage that the contents can be cooled quickly. In addition, the resin container is less likely to be plastically deformed and has an advantage that it is suitable for repeated use.
[0004]
[Problems to be solved by the invention]
However, since the metal container is difficult to twist when the solidified product is taken out, there is a problem that it is difficult to take out the solidified product, and in some cases the solidified product cannot be taken out according to the shape of the container. Further, if the metal is made thin and easy to twist, there is a problem that the metal cannot be repeatedly used to obtain a solidified product having the same shape because the metal is plastically deformed and does not return to its original shape when taken out.
[0005]
On the other hand, since the resin container has poor thermal conductivity, there is a problem that it takes time to cool the contents.
[0006]
Therefore, an object of the present invention is to provide a cooling container that can be used repeatedly to obtain a solidified product having a certain shape and that can shorten the cooling time, and a method for manufacturing the same.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows.
[0008]
1st invention is a cooling container used when cooling the liquid content and solidifying to arbitrary shapes, Comprising: The bottom face part which consists of a polygonal shape in planar view, and stands up from the outer periphery of the bottom face part An elastically deformable plastic container having a peripheral wall, a metal layer formed on the inner surface of the plastic container via an adhesive film, and a film layer formed on the metal layer so as to cover the inner surface The metal layer is formed in a portion excluding the corner portion at the bottom surface portion, and is formed so as to rise in a band shape from the center of each side of the bottom surface portion at the peripheral wall portion.
[0009]
According to a second invention, in the configuration of the first invention, the bottom surface portion has a rectangular shape in plan view.
[0010]
A third invention is a cooling container used for cooling a liquid content and solidifying it into an arbitrary shape, and has an opening surface through which the content is taken in and out, an elastically deformable plastic container, A metal layer formed on the inner surface of the plastic container via an adhesive film and a film layer formed on the metal layer so as to cover the inner surface so that the end surface of the metal layer is aligned with the opening surface And the thermal conductivity of the metal constituting the metal layer is 80 W / m · k or more.
[0011]
A fourth invention is a cooling container used for cooling a liquid content and solidifying it into an arbitrary shape, and having an opening surface through which the content is taken in and out, an elastically deformable plastic container, A metal layer formed on the inner surface of the plastic container via an adhesive film, and a film layer formed on the metal layer so as to cover the inner surface, the thickness of the adhesive film being 4 to 300 μm Yes, the thickness of the metal layer is 50 to 100 μm, the thickness of the film layer is 16 to 100 μm, and the thickness from the adhesive film to the film is set to be 100 to 1000 μm.
[0012]
A fifth invention is a method for manufacturing a cooling container according to any one of claims 1 to 4, and is composed of at least an adhesive film, a metal layer, and a film layer when the mold is opened. A step of placing the laminate in an injection mold, a step of clamping the mold with the laminate placed to form a cavity, and injecting a molten resin into the formed cavity to form a plastic container At the same time, the method includes a step of fixing the laminate to a plastic container and molding a cooling container, and a step of cooling and solidifying the molded cooling container.
[0013]
6th invention is the manufacturing method of the container for cooling described in any one of Claims 1-4, Comprising: The laminated body comprised at least from an adhesive film, a metal layer, and a film layer is predetermined shape. A step of pre-molding, a step of placing the pre-formed laminate in an injection mold in a state where the mold is opened, and a step of forming a cavity by clamping the die in a state where the laminate is arranged Injecting molten resin into the formed cavity to form a plastic container, and at the same time, fixing the laminate to the plastic container and molding the cooling container, and cooling and solidifying the molded cooling container It is equipped with.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
FIG. 1 is a sectional view showing an embodiment of the cooling container according to the present invention. 2-4 is sectional drawing which shows one of the processes of the manufacturing method of the cooling container of this invention. FIG. 5 is a plan view showing a metal layer pattern of the cooling container according to the present invention. In the figure, 1 is a plastic container, 2 is a laminate, 3 is a film layer, 4 is a metal layer, 5 is an adhesive layer, 6 is an adhesive film, 7 is a content, and 8 is an uneven portion.
[0017]
In the cooling container according to the present invention, a metal layer 4 is formed on an inner surface and / or an outer surface of an elastically deformable plastic container 1 having an opening, and a film layer 3 is formed thereon so as to cover at least the metal layer 4. (See FIG. 1). In order to obtain a cooling container having such a configuration, the laminate 2 having at least the film layer 3 and the metal layer 4 is disposed in a molding die, and a cavity formed by clamping is filled with a molten resin, After cooling, the mold may be opened and the plastic container 1 and the laminate 2 may be integrated. Alternatively, after forming the laminate 2 having at least the film layer 3 and the metal layer 4 into a predetermined shape, the laminate 2 is mounted on a mold, filled with a molten resin in a cavity formed by clamping, and the mold after cooling is used. It is good to open and integrate the plastic container 1 and the laminated body 2 (refer FIGS. 2-4).
[0018]
The laminate 2 has at least a film layer 3 and a metal layer 4 (see FIG. 2).
[0019]
The film layer 3 has a function of protecting the metal layer 4 and facilitating taking out the contents 7. Since it is necessary to shape | mold the film layer 3 in the shape which follows the shape of the container for cooling on a manufacturing process, it is preferable to use the thing excellent in a moldability. Examples of such a film layer 3 include single-layer films such as polyethylene, polypropylene, chlorinated polypropylene, polyester, urethane, Teflon, vinylidene fluoride, and silicone, and mixtures or laminated films thereof. In particular, it is preferable to use a fluorine-containing film such as Teflon or vinylidene fluoride as the film layer 3 because the content 7 can be taken out while maintaining its shape with excellent releasability.
[0020]
The thickness of the film layer 3 is suitably 4 to 300 μm, more preferably 16 to 100 μm. If the thickness of the film layer 3 is less than 4 μm, lamination with the metal layer 4 is difficult and the protective function is insufficient. On the other hand, if it exceeds 300 μm, the cooling effect is hindered, and further economical efficiency is lacking.
[0021]
The metal layer 4 has a function of enhancing the cooling effect of the contents 7 due to its excellent thermal conductivity. 7-400 micrometers is suitable for the thickness of the metal layer 4, More preferably, it is 50-100 micrometers. If the thickness of the metal layer 4 is less than 7 μm, the cooling effect is insufficient, and if it exceeds 400 μm, the formability is deteriorated.
[0022]
Generally, a metal has a higher thermal conductivity than a resin, so that the cooling effect can be increased. In particular, if the thermal conductivity of the metal composing the metal layer 4 is 80 W / m · k or more, the effect is more remarkable. Such metals include iron, nickel, chromium, indium and the like. Furthermore, it is most preferable if the thermal conductivity is 150 W / m · k or more. Such metals include aluminum, copper, and magnesium.
[0023]
In order to laminate the film layer 3 and the metal layer 4, a normal lamination method can be used. For example, a so-called thermal laminating method in which the surface of the film layer 3 is heated until it exhibits adhesiveness and the metal layer 4 is bonded, or a so-called dry laminating method in which the film layer 3 and the metal layer 4 are bonded through an adhesive is used. is there. Also, a so-called extrusion coating method in which a resin that becomes the film layer 3 is coated on the metal layer 4 by extrusion molding may be employed. Further, the metal layer 4 may be formed on the film layer 3 by plating or the like. The film layer 3 is configured to cover at least the metal layer 4.
[0024]
Moreover, you may form the metal layer 4 partially. When the metal layer 4 is partially provided, the metal layer 4 formed in a predetermined shape in advance may be bonded to a predetermined portion of the film layer 3. Alternatively, after the metal layer 4 is bonded to the entire surface of the film layer 3, the metal layer 4 may be partially formed in a predetermined shape by an etching method or the like. If the metal layer 4 is provided in a portion that needs to be cooled and the metal layer 4 is not formed in a portion that is greatly deformed when the contents 7 are taken out, the durability of the cooling container can be further enhanced. As an example of the case where the metal layer 4 is partially provided as described above, a pattern of the metal layer 4 as shown in FIG. 5 can be used.
[0025]
Moreover, in order to improve the adhesiveness of the surface adhere | attached on the molding resin of the laminated body 2, you may provide the contact bonding layer 5. FIG. The adhesive layer 5 may be appropriately selected from those that adhere to the molding resin and the metal layer 4, and is not particularly limited. For example, a polyvinyl chloride vinyl acetate copolymer resin, an acrylic resin, or a urethane resin can be used. Further, as the adhesive layer 5, an adhesive film 6 made of polyurethane, polyethylene, ethylene vinyl alcohol (EVA), polyester, polypropylene, or the like may be laminated on the metal layer 4. In order to laminate the adhesive film 6 on the metal layer 4, the same method as that for laminating the film layer 3 and the metal layer 4 can be used. The thickness of the adhesive film 6 is suitably 4 to 300 μm. When the adhesive film 6 is laminated | stacked, as thickness of the laminated body 2 whole, 100-1000 micrometers is preferable. If the thickness is less than 100 μm, wrinkles are likely to occur in the laminate 2 due to the hot pressure of the molding resin when the molding resin is injected. If it exceeds 1000 μm, the moldability of the laminate 2 is inferior, and it is difficult to process the laminate 2 into a three-dimensional shape. In particular, 250 to 600 μm is preferable. The laminate 2 in this range has good workability for punching the laminate 2 into an arbitrary shape, cutting it, and inserting it into a molding die. Moreover, since the laminated body 2 is excellent in moldability, the laminated body 2 can be processed into a three-dimensional shape in a short time.
[0026]
Next, a method for manufacturing a cooling container using the laminate 2 having the above-described configuration will be described.
[0027]
First, the laminate 2 is set on the surface of a movable mold that is a mold for injection molding by a clamp member.
[0028]
As a specific example of how to set to the movable mold, the long laminate 2 is temporarily wound around a roll shaft to form a roll-shaped scroll, and this roll-shaped scroll is integrated with the movable mold on the movable mold for injection molding. The movable body is placed so as to be movable, and the laminated body 2 is unwound from the roll-shaped scroll while passing between the retracted movable mold and the fixed mold, and integrally with the movable mold at the lower portion of the movable mold for injection molding. What is necessary is just to make it wind up the laminated body 2 with the roll axis | shaft of the film winding means installed so that movement was possible. As another example, the single-layer laminated body 2 may be used to set the movable surface by a robot or manually. When the laminate 2 is set on the movable surface, the laminate 2 is placed on the movable surface, the position of the laminate 2 with respect to the movable surface is determined by a positioning sensor or the like, and the laminate 2 is injected. It is good to press on the surface of the movable mold for molding with a clamp member.
[0029]
Next, after setting the laminated body 2 on the surface of the movable mold for injection molding, the laminated body 2 is placed along the cavity forming surface of the movable mold using the vacuum suction holes formed in the movable mold for injection molding. By vacuum suction in this manner, the three-dimensional shape is processed along the cavity forming surface of the movable concave portion for injection molding, that is, the cavity. As a specific example, with a heating plate inserted between a movable mold and a fixed mold, the laminated body 2 set on the surface of the movable mold is heated and softened above its softening point, and a movable mold for injection molding is used. There is a method in which the space between the recess and the laminate 2 is sealed, evacuated from a vacuum suction hole and vacuum-sucked, and the laminate 2 is brought into close contact with the inner surface (cavity forming surface) of a movable recess for injection molding. When processing the three-dimensional shape or pressing and fixing the laminated body 2 with a clamp member, unnecessary portions of the laminated body 2 may be punched.
[0030]
Instead of the above method, before setting the laminate 2 on the surface of the injection mold movable mold, the laminate 2 is previously formed using a three-dimensional machining mold different from the injection mold movable mold and the fixed mold. Three-dimensionally processed into a desired shape (see FIG. 3), and after punching into a desired shape (see FIG. 4), the three-dimensionally processed laminate 2 is inserted into the concave portion of the movable mold for injection molding. May be. As a method for processing into a three-dimensional shape, there are a vacuum forming method, a pressure forming method, a pressure forming method for pressing a heated rubber, a press forming method, a hydroforming method, and the like. In addition, you may punch at the same time when processing to a three-dimensional shape. Moreover, you may process into a three-dimensional shape after a punching process.
[0031]
Next, the movable mold is closed with respect to the fixed mold, and the molten molding resin is injected into the cavity from the gate portion of the fixed mold to solidify the molding resin to form the plastic container 1 in the cavity. The laminate 2 is integrally bonded to the surface.
[0032]
The place where the laminated body 2 is arranged is preferably a portion in contact with the contents 7 of the cooling container. However, if the portion is extended to the upper side where the contents 7 do not contact, heat exchange between the contents 7 and the cold air can be achieved quickly. Great cooling effect. Moreover, if the cross section of the metal layer 4 is exposed by exposing the cross section of the laminated body 2, the heat exchange with cold air can also be achieved quickly, so that the cooling effect is increased. Moreover, the place which arrange | positions the laminated body 2 may be either the inner surface or the outer surface of a cooling container, and may be arrange | positioned on both surfaces.
[0033]
As the molding resin, a resin that can withstand twisting at the time of taking out the solid material is preferable, and a resin that is easily elastically deformed is preferable. As such a molding resin, polyethylene, polypropylene, thermoplastic elastomer and the like are preferable.
[0034]
The shape of the molded product may be a single shape or may be connected to a plurality of shapes.
[0035]
Thereafter, after removing the molded product from the movable mold, unnecessary portions of the laminate 2 bonded to the plastic container 1 are removed. Note that, as described above, in the case of punching into a desired shape in advance, it is not necessary to remove an unnecessary portion of the stacked body 2.
[0036]
In the case of a horizontal injection molding machine, it is as described above. However, in the case of a vertical injection molding machine, the relationship between the fixed mold and the movable mold is reversed from that of the horizontal injection molding machine. Moreover, the mold of the injection molding machine can be similarly applied not only to the case of two sheets but also to the case of three sheets.
[0037]
【Example】
A metal foil made of chlorinated polypropylene having a thickness of 100 μm and aluminum having a thickness of 100 μm was used as the metal layer. Both were laminated by dry lamination via a urethane adhesive. Next, a film made of polypropylene having a thickness of 100 μm was laminated as an adhesive film on the metal layer side by a dry laminating method via a urethane adhesive to obtain a laminate.
[0038]
The laminate thus obtained was preformed into a pudding container shape with a die press, and then unnecessary portions were cut and removed.
[0039]
Next, the pre-formed laminate was mounted on a molding die and molded using polypropylene as a molding resin.
[0040]
Thus, a cooling container having a metal layer covered with a film layer on the inner surface of the polypropylene container was obtained.
[0041]
When the pudding material was cooled as a content using the cooling container thus obtained, it was possible to repeatedly produce a pudding having a uniform shape in a short time.
[0042]
【The invention's effect】
Since the present invention adopts the configuration as described above, the following effects can be obtained.
[0043]
In the present invention , a metal layer is formed on an inner surface and / or an outer surface of an elastically deformable plastic container having an opening, and a film layer is formed thereon so as to cover at least the metal layer. Since it is configured, it can withstand repeated twists and has excellent thermal conductivity and a high cooling effect.
In the first and second inventions, since the metal layer is not formed at the corner portion, that is, the portion that is greatly deformed when the contents are taken out while twisting the cooling container, the ease of deformation of the cooling container is improved. Further, durability against repeated twisting can be further improved.
In the third aspect of the invention, since the end face of the metal layer composed of a metal having a high thermal conductivity is exposed, heat exchange with cold air is promptly performed, and the cooling effect of the contents can be increased.
According to a fourth aspect of the present invention, the cooling effect and the formability of the laminate are ensured by setting the metal layer to a predetermined thickness, and the easiness of stacking on the metal layer and the metal layer by setting the film layer to a predetermined thickness. By securing the protective function of the adhesive, setting the adhesive film to a predetermined thickness, and setting the thickness of the entire laminate to a predetermined thickness, it is possible to prevent wrinkles that occur when the molten resin is injected or to form the laminate. And the time for processing the laminated body into a three-dimensional shape can be shortened.
[0044]
In the fifth and sixth inventions, since the molten resin is fixed to the laminate and the plastic container and the laminate are integrated, it can be used repeatedly to obtain a solid product having a fixed shape, and the cooling time It is possible to easily obtain a cooling container capable of shortening.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a cooling container according to the present invention.
FIG. 2 is a cross-sectional view showing one of the steps of the method for manufacturing a cooling container according to the present invention.
FIG. 3 is a cross-sectional view showing one of the steps of the method for manufacturing a cooling container according to the present invention.
FIG. 4 is a cross-sectional view showing one of the steps of the method for manufacturing a cooling container according to the present invention.
FIG. 5 is a plan view showing a pattern of a metal layer of a cooling container according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Plastic container 2 Laminated body 3 Film layer 4 Metal layer 5 Adhesive layer 6 Adhesive film 7 Contents 8 Uneven part

Claims (6)

A cooling container used for cooling a liquid content and solidifying it into an arbitrary shape,
An elastically deformable plastic container having a bottom surface portion having a polygonal shape in plan view and a peripheral wall portion rising from an outer peripheral edge of the bottom surface portion;
A metal layer formed on the inner surface of the plastic container via an adhesive film;
A film layer formed on the metal layer and covering the inner surface;
The cooling container , wherein the metal layer is formed in a portion excluding the corner portion in the bottom surface portion, and is formed so as to rise in a band shape from the center of each side of the bottom surface portion in the peripheral wall portion . The cooling container according to claim 1, wherein the bottom portion has a rectangular shape in plan view . A cooling container used for cooling a liquid content and solidifying it into an arbitrary shape,
An elastically deformable plastic container having an opening surface through which the contents are taken in and out;
A metal layer formed on the inner surface of the plastic container via an adhesive film;
A film layer formed on the metal layer and covering the inner surface;
An end face of the metal layer is exposed to be aligned with the opening face;
A cooling container , wherein the metal constituting the metal layer has a thermal conductivity of 80 W / m · k or more . A cooling container used for cooling a liquid content and solidifying it into an arbitrary shape,
An elastically deformable plastic container having an opening surface through which the contents are taken in and out;
A metal layer formed on the inner surface of the plastic container via an adhesive film;
A film layer formed on the metal layer and covering the inner surface;
The adhesive film has a thickness of 4 to 300 μm,
The thickness of the metal layer is 50-100 μm,
The thickness of the film layer is 16 to 100 μm,
The cooling container set so that the thickness from the said adhesive film to the said film might be set to 100-1000 micrometers . It is a manufacturing method of the cooling container according to any one of claims 1 to 4,
In a state where the mold is opened, a step of disposing a laminate composed of at least the adhesive film, the metal layer, and the film layer in an injection mold,
Forming a cavity by clamping in a state where the laminate is disposed; and
Forming the plastic container by injecting molten resin into the formed cavity, and simultaneously forming the cooling container by fixing the laminate to the plastic container;
A cooling container manufacturing method comprising: a step of cooling and solidifying the molded cooling container. It is a manufacturing method of the cooling container according to any one of claims 1 to 4,
Pre-molding a laminate comprising at least the adhesive film, the metal layer and the film layer into a predetermined shape;
With the mold open, the step of placing the preformed laminate in an injection mold,
Forming a cavity by clamping in a state where the laminate is disposed; and
Forming the plastic container by injecting molten resin into the formed cavity, and simultaneously forming the cooling container by fixing the laminate to the plastic container;
A cooling container manufacturing method comprising: a step of cooling and solidifying the molded cooling container.

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