WO2021060476A1 - Molded body, molded body production method, and heat-insulating container - Google Patents

Abstract

The present invention is a molded body comprising a hollow resin molded body, a heat-insulating member, and a heat-storing member, wherein the heat-insulating member is disposed inside the resin molded body, and the heat-storing member is disposed so as to be in contact with at least one of the heat-insulating member and the resin molded body. The present invention thus provides a heat-insulating container that is capable of maintaining a prescribed temperature therein and does not require removal of the heat-storing member each time the container is used.

Description

Molded article, manufacturing method of molded article, and heat insulating container

The present invention relates to a molded product, a method for producing the molded product, and a heat insulating container.

In a heat insulating container such as a container used for transporting goods, a heat storage member is used to keep the goods to be stored at a predetermined temperature.

Patent Document 1 discloses a heat insulating container to which a heat storage member can be attached and detached.

JP-A-2019-14481

However, the heat insulating container disclosed in Patent Document 1 requires the installation and removal of the heat storage member each time it is used, which is troublesome.

The present invention has been made in view of such circumstances, and is a molded body or a molded body for realizing a heat insulating container that can keep the inside at a predetermined temperature and does not require removal of a heat storage member each time it is used. It is an object of the present invention to provide a method of manufacturing the above and a heat insulating container.

According to one aspect of the present invention, the molded body includes a hollow resin molded body, a heat insulating member, and a heat storage member, and the heat insulating member is arranged inside the resin molded body and the heat storage member. Is provided so as to be arranged so as to be in contact with at least one of the heat insulating member and the resin molded body.

According to such a molded body, it is possible to keep the inside at a predetermined temperature, and it is possible to realize a heat insulating container that does not require removal of the heat storage member each time it is used, which is an advantageous effect.

Plane perspective view of the heat insulating container. It is a rear perspective view of a heat insulating container. A plan perspective view with the top panel of the heat insulating container opened. [Fig. 4A] front surface and [Fig. 4B] back surface of the longitudinal side panel (molded article) of the heat insulating container. FIG. 4 is a cross-sectional view of the longitudinal side panel (molded body) shown in FIG. A method for manufacturing a molded product. A method for manufacturing a molded product. A method for manufacturing a molded product.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The features shown in the embodiments shown below can be combined with each other. In addition, the invention is independently established for each feature.

1. 1. Overall Configuration Section 1 describes the heat insulating container 1 according to the present embodiment. The heat insulating container 1 is, for example, a container for transportation. FIG. 1 is a plan perspective view of the heat insulating container 1, and FIG. 2 is a rear perspective view of the heat insulating container 1. FIG. 3 is a plan perspective view of the heat insulating container 1 with the upper surface panel 11 opened.

As shown in FIGS. 1 to 3, the heat insulating container 1 has a storage space S capable of accommodating an article, and is composed of a molded body 2. The heat insulating container 1 includes an upper surface panel 11, a lower surface panel 12, a short side panel 13, a longitudinal side panel 14, a hinge 15, a card holder 16, a concave handle portion 17, a loading fixing portion 18, and a lock. It is provided with a member 19. Hereinafter, each configuration will be described in detail.

<Top panel 11>
Goods are stored and transported in the storage space S of the heat insulating container 1. Therefore, an openable and closable top panel 11 for putting in and taking out articles is provided. Specifically, the upper surface panel 11 is connected to the adjacent longitudinal side panel 14 via a hinge 15 and has a structure that can be opened and closed.

<Bottom panel 12>
The lower surface panel 12 is provided at a position facing the upper surface panel 11 and functions as a floor surface of the heat insulating container 1.

<Short side panel 13>
The lateral side panel 13 functions as a lateral side surface of the heat insulating container 1 in the lateral direction.

<Longitudinal side panel 14>
FIG. 4 shows the front surface of [FIG. 4A] and the back surface of [FIG. 4B] of the longitudinal side panel 14 of the heat insulating container 1. The longitudinal side panel 14 functions as a longitudinal side surface of the heat insulating container 1. A molded body 2 is used for the longitudinal side panel 14. The molded body 2 will be described in detail later.

<Hinge 15>
The hinge 15 realizes an openable / closable structure of the upper surface panel 11 by connecting the upper surface panel 11 and the longitudinal side surface panel 14.

<Card holder 16>
The card holder 16 is provided on the short side panel 13 and the long side panel 14, respectively. The card holder 16 is configured to be capable of accommodating details, slips, business cards of persons in charge, and the like for transporting articles using the heat insulating container 1. It is preferable to carry out the procedure so that it can be visually recognized by a human, but the form thereof is not particularly limited. In addition, it may be provided in at least one of the short side panel 13 and the long side panel 14 which are paired with each other.

<Concave handle 17>
The concave handle portion 17 is provided on a pair of short side panels 13 facing each other and a pair of long side panels 14 facing each other. That is, it has a structure that is easy for the carrier to carry when transporting the heat insulating container 1. It may be provided on at least one of the short side panel 13 and the long side panel 14. Of course, instead of the concave handle portion 17, a convex handle portion may be provided.

<Loading fixing part 18>
The load fixing unit 18 enables the heat insulating container 1 to be loaded and used when storing and transporting the heat insulating container 1. Specifically, the load fixing portion 18 includes an upper surface convex portion 18a and a lower surface concave portion 18b. When the heat insulating containers 1 are stacked, the upper surface convex portion 18a and the lower surface concave portion 18b are fitted. Therefore, positioning can be easily performed at the time of loading, and the heat insulating container 1 can be loaded in a well-balanced manner. Since the heat insulating containers 1 are fitted to each other, the loaded heat insulating container 1 is less likely to slip off the upper heat insulating container 1 even when a load is applied in the lateral direction.

<Lock member 19>
The lock member 19 is configured to regulate the careless opening and closing of the upper surface panel 11. The form is not particularly limited.

2. Mold 2
In Section 2, the molded body 2 constituting the heat insulating container 1 will be described.

FIG. 5 is a cross-sectional view of the longitudinal side panel 14 (molded body 2) shown in FIG. Specifically, the molded body 2 includes a hollow resin molded body 21, a heat insulating member 22, and a heat storage member 23. The heat insulating member 22 is arranged inside the resin molded body 21. Here, the heat storage member 23 is in contact with both the resin molded body 21 and the heat insulating member 22. The heat storage member 23 is not necessarily limited to this form, and may be arranged so as to be in contact with at least one of the heat insulating member 22 and the resin molded body 21. With such a configuration, the heat storage member 23 is provided so as to face each other in the accommodation space S of the heat insulating container 1.

The resin molded body 21 is a molded body molded from a resin molding material. The resin molding material is, for example, a thermoplastic resin such as polyolefin, and the polyolefin includes low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, ethylene-propylene copolymer, styrene resin, butadiene resin and the like. The mixture and the like can be mentioned.

The heat insulating member 22 is not limited to foam, but all those having a heat insulating effect such as urethane foam, phenol foam, and polystyrene foam are targeted. The foam can be formed of a resin to which a foaming agent has been added. Examples of the material for forming the foam include homopolymers or copolymers of olefins such as ethylene, propylene, butene, isoprenepentene, and methylpentene, polyolefins, polyamides, polystyrenes, polyvinyl chlorides, polyacrylonitriles, and ethylenes. Acrylic derivatives such as -ethyl acrylate copolymers, polycarbonates, vinyl acetate copolymers such as ethylene-vinyl acetate copolymers, terpolymers such as ionomers and ethylene-propylene-dienes, acrylonitrile-styrene copolymers, ABS resins , Polyphenylene oxide, polyacetal, thermoplastic resins such as thermoplastic polyimides, and thermocurable resins such as phenolic resins, melanin resins, epoxy resins, polyurethanes, and thermocurable polymers.

The heat storage member 23 includes all members having a heat storage effect, such as water, sodium acetate, fatty acids, and superabsorbent polymers such as sodium polyacrylate. The heat storage member 23 is configured by accommodating the members having the heat storage effect in the container. By forming this container with the same material as the resin molded body 21, it can be welded at the time of molding. As a result, advantageous effects such as strengthening the strength of the molded body 2 and suppressing rattling are obtained.

Further, as shown in FIG. 5, in the molded body 2, the heat insulating member 22 includes a recess 221. The heat storage member 23 is arranged in the recess 221. When arranging the heat storage member 23 in the recess 221 it is preferable to fix the heat storage member 23 to the heat insulating member 22 by a method such as fitting, an adhesive, or double-sided tape.

The heat storage member 23 is arranged at a position sandwiched between the heat insulating member 22 and the resin molded body 21, but the heat insulating member 22 is provided with a recess, and the heat storage member 23 is arranged in the heat insulating member 22 recess. As described above, a manufacturing advantage can be obtained. In addition, since the heat storage member 23 is fitted into the recess of the heat insulating member 22, the side surface of the heat storage member 23 is surrounded by the heat insulating member 22, so that the time required for heat transfer to and from the ambient temperature is longer. The effect of slowing down can be obtained. When the molded body 2 has such a structure, it is desirable that the thickness of the heat storage member 23 is smaller than the thickness of the heat insulating member 22.

That is, in the molded body 2, assuming that the thickness of the heat insulating member 22 is D and the thickness of the heat storage member 23 is d, the value of (d / D) is 0.05 to 0.9.

Specifically, for example, the value of (d / D) is 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13. , 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.21, 0.22, 0.23, 0.24, 0.25,0 .26, 0.27, 0.28, 0.29, 0.3, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38 , 0.39, 0.4, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.5, 0 .51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.6, 0.61, 0.62, 0.63 , 0.64,0.65,0.66,0.67,0.68,0.69,0.7,0.71,0.72,0.73,0.74,0.75,0 .76, 0.77, 0.78, 0.79, 0.8, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, 0.88 , 0.89, 0.9, and may be within the range between any two of the numerical values exemplified here.

Further, in the molded body 2, when the area of the heat insulating member 22 is S1 and the area of the heat storage member 23 is S2 in a plan view, the value of (S2 / S1) is 0.05 to 0.9.

Specifically, for example, the value of (S2 / S1) is 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13. , 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.21, 0.22, 0.23, 0.24, 0.25,0 .26, 0.27, 0.28, 0.29, 0.3, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38 , 0.39, 0.4, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.5, 0 .51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.6, 0.61, 0.62, 0.63 , 0.64,0.65,0.66,0.67,0.68,0.69,0.7,0.71,0.72,0.73,0.74,0.75,0 .76, 0.77, 0.78, 0.79, 0.8, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, 0.88 , 0.89, 0.9, and may be within the range between any two of the numerical values exemplified here.

Since the heat storage member 23 has a large heat capacity, a large amount of heat can be stored. When the ambient temperature is lower than that of the heat storage member 23, a large amount of heat is transferred from the heat storage member 23 to the surroundings. Further, when the ambient temperature is higher than that of the heat storage member 23, a large amount of heat is transferred from the surroundings to the heat storage member 23. Therefore, even if the ambient temperature changes, the accommodation space S of the heat insulating container 1 can be maintained close to a predetermined temperature while the heat transfer with the heat storage member 23 continues for a long time.

When the heat storage member 23 is used as a cold insulating agent, the temperature of the heat insulating member 22 having a low thermal conductivity rises slowly when the temperature around the molded body 2 rises. The increased heat is transferred to the heat storage member 23. Since the heat storage member 23 has a large heat capacity, heat continues to move to the heat storage member 23 for a long time. During that time, the accommodation space S of the heat insulating container 1 can maintain a predetermined temperature. The temperature of the accommodation space S of the heat insulating container 1 is reduced from dropping sharply.

While an article is placed in the storage space S of the heat insulating container 1 and stored in a warehouse controlled at a predetermined temperature or transported by a transport vehicle such as a truck, the heat insulating member 22, the heat storage member 23, and the storage space of the heat insulating container 1 are used. S approaches the ambient temperature. Therefore, the article can also be managed close to a predetermined temperature.

After transporting the goods, at a transportation destination such as a convenience store, the molded body 2 is unloaded from the transport vehicle and transported to a predetermined place. While the heat insulating container 1 is lowered and moved to a predetermined place, and while the heat insulating container 1 is stored in the predetermined place, the accommodation space S of the heat insulating container 1 is kept at the controlled temperature even if the ambient temperature is different from the controlled temperature. Can be kept close and maintained for a long time.

In order to maintain the freshness when the article is food and the quality when it is a precision machine, it is desirable to control it at a predetermined temperature, but if it is left in a place not under control for a long time, the freshness and quality of the article will be improved. affect. However, by using the molded product 2 of the present invention, the temperature change of the storage space S even when the heat insulating container 1 is exposed to the outside air for a long time is suppressed, and the effect of preventing deterioration of the freshness and quality of the article can be obtained.

In summary, the heat insulating container 1 can keep the inside of the accommodation space S at a predetermined temperature for a long time, and it is not necessary to remove the heat storage member 23 each time it is used, which solves the troublesome problem in the conventional heat insulating container. It has the advantageous effect of

3. 3. Manufacturing Method of Molded Body 2 Section 3 describes a manufacturing method of the molded body 2.
3-1. Configuration of Molding Machine 3 The molding machine 3 includes a resin supply device 4, a T-die 5, and a pair of molds 71 and 72. The resin supply device 4 includes a hopper 41, an extruder 42, and an accumulator 45. The extruder 42 and the accumulator 45 are connected via a connecting pipe 61. The accumulator 45 and the T-die 5 are connected via a connecting pipe 62. Hereinafter, each configuration will be described in detail.

<Hopper 41, extruder 42>
The hopper 41 is used to put the raw material resin M into the cylinder 43 of the extruder 42. The form of the raw material resin M is not particularly limited, but is usually in the form of pellets. The raw material resin M is charged into the cylinder 43 from the hopper 41 and then heated in the cylinder 43 to be melted into a molten resin. Further, it is conveyed toward the tip of the cylinder 43 by the rotation of the screw arranged in the cylinder 43. The screw is arranged in the cylinder 43, and the molten resin is kneaded and conveyed by its rotation. A gear device is provided at the base end of the screw, and the screw is rotationally driven by the gear device. The number of screws arranged in the cylinder 43 may be one or two or more.

<Accumulator 45, T-die 5>
The foamed resin obtained by melt-kneading the raw material resin M and the foaming agent is extruded from the resin extrusion port of the cylinder 43 and injected into the accumulator 45 through the connecting pipe 61. The accumulator 45 includes a cylinder 46 and a piston 47 slidable inside the cylinder 46, so that the molten raw material resin M can be stored in the cylinder 46. Then, by moving the piston 47 after a predetermined amount of the foamed resin is stored in the cylinder 46, the foamed resin is pushed out from the slit provided in the T die 5 through the connecting pipe 62 and hung down to cause the two resin sheets 2s. To form.

<A pair of molds 71, 72>
The pair of resin sheets 2s is guided between the pair of molds 71 and 72. As shown in FIGS. 6 and 7, each of the pair of dies 71 and 72 is provided with a large number of decompression suction holes (not shown), and the resin sheet 2s is decompressed and sucked to form the pair of dies 71. It is possible to shape the shape along 72. The molds 71 and 72 have a shape having recesses 71c and 72c, and pinch-off portions 71p and 72p are provided so as to surround the recesses 71c and 72c. In the mold clamping step described later, the resin sheet 2s is cut off by the pinch-off portions 71p and 72p.

3-2. Flow of Manufacturing Method The manufacturing method of the molded body 2 includes a hanging step, a shaping step, an insert step, and a mold clamping step. Hereinafter, a detailed description will be given.

<Dripping process>
In the hanging step, two resin sheets 2s are hung between the pair of molds 71 and 72. Specifically, as shown in FIGS. 6 and 7, the insert member 24 in which the heat insulating member 22 and the heat storage member 23 are integrated is arranged between the pair of molds 71 and 72, and is placed on both sides of the insert member 24. The two resin sheets 2s are hung down.

Then, a pair of resin sheets 2s formed by extruding the molten foam resin from the slit of the T die 5 and hanging it between the pair of molds 71 and 72 are hung. In the present embodiment, direct vacuum molding is performed using the pair of resin sheets 2s extruded from the T die 5 as they are, so that the pair of resin sheets 2s may be cooled to room temperature and solidified before molding. No, the solidified pair of resin sheets 2s is not heated before molding. Here, in FIGS. 6 and 7, the insert member 24 is shown between the pair of resin sheets 2s during the hanging step, but in the hanging step, the insert member 24 is kept waiting at another place. May be good.

<Shaping process>
Next, after the pair of resin sheets 2s are brought into contact with a part of the pair of molds 71 and 72, respectively, the two resin sheets 2s are sucked under reduced pressure by both of the pair of molds 71 and 72 to form a pair. It is shaped according to the molds 71 and 72.

<Insert process and mold clamping process>
Next, in the insert step, the insert member 24 is welded to the pair of resin sheets 2s. Then, as shown in FIG. 8, in the mold clamping step, the pair of molds 71 and 72 are molded. That is, in the insert step, the heat storage member 23 is arranged at a position sandwiched between the heat insulating member 22 and the two resin sheets 63a and 63b. Finally, by taking out the molded product from the pair of molds 71 and 72 and removing the burr 2b, the molded product 2 shown in FIG. 5 is obtained.

4. Deformation Example Section 4 describes a modification relating to the heat insulating container 1, the molded body 2, and the like. That is, the heat insulating container 1 and the molded body 2 may be implemented according to the following aspects.

The heat insulating container 1 was provided with a hinge 15. However, opening and closing the heat insulating container 1 via the hinge 15 is an example. In addition, a groove having a width of about the thickness of the longitudinal side panel 14 is formed on each side surface of the top panel 11 to form a longitudinal side panel. It may be fitted to 14. Further, a plate-shaped magnetic material is attached around the lower surface of the upper surface panel 11, a plate-shaped magnetic material such as iron is attached to the upper surface of the opposing longitudinal side panel 14, and the upper surface panel 11 is attached to the longitudinal side panel. It may be attached to 14.

The shape of the heat insulating container 1 is a rectangular parallelepiped, but the shape is not limited to this, and a polyhedral structure may be used. The upper surface panel 11 and the lower surface panel 12 are not limited to a quadrangle, but may be a polygon such as a pentagon or a hexagon. Further, the shape of the heat insulating container 1 may be a cylinder instead of a rectangular parallelepiped or the like. If the article has a cylindrical shape, the effect can be evenly obtained from the heat storage member 23 included in the longitudinal side panel 14.

As the molded body 2, the longitudinal side panel 14 has been described as an example. However, the molded body 2 may be adopted for at least one of the upper surface panel 11, the lower surface panel 12, the short side panel 13, and the longitudinal side panel 14. However, since it is costly to use the molded body 2 for all of the upper surface panel 11, the lower surface panel 12, the short side panel 13, and the longitudinal side panel 14, in terms of cost effectiveness, the above-mentioned longitudinal side panel 14 or the longitudinal side panel 14 or It is preferable to use the molded body 2 for the top panel 11.

5. Conclusion In this way, it is possible to provide a molded body that can keep the inside at a predetermined temperature and realize a heat insulating container that does not require removal of the heat storage member each time it is used.

It may be provided in each of the following aspects.
In the molded body, the heat insulating member includes a recess, and the heat storage member is arranged in the recess.
In the molded product, where D is the thickness of the heat insulating member and d is the thickness of the heat storage member, the value of (d / D) is 0.05 to 0.9.
In the molded body, when the area of the heat insulating member is S1 and the area of the heat storage member is S2 in a plan view, the value of (S2 / S1) is 0.05 to 0.9.
It is a heat insulating container, has a storage space capable of accommodating articles, and is composed of a molded body. The molded body includes a hollow resin molded body, a heat insulating member, and a heat storage member. , The heat storage member is arranged inside the resin molded body, is arranged at a position sandwiched between the heat insulating member and the resin molded body, and is provided so that the heat storage member faces each other in the accommodation space. ..
Of course, this is not the case.

Finally, various embodiments of the present invention have been described, but these are presented as examples and are not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. The embodiment and its modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and the equivalent scope thereof.

1: Insulation container, 11: Top panel, 12: Bottom panel, 13: Short side panel, 14: Longitudinal side panel, 15: Hinge, 16: Card holder, 17: Recessed handle, 18: Loading fixing part, 18a : Upper surface convex part, 18b: Lower surface concave part, 19: Lock member 2: Molded body, 2b: Burr, 2s: Resin sheet, 21: Resin molded body, 22: Insulation member, 221: Concave part, 23: Heat storage member, 24 : Insert member 3: Molding machine 4: Resin feeder, 41: Hopper, 42: Extruder, 43: Cylinder, 45: Accumulator, 46: Cylinder, 47: Piston, 5: T die, 61: Connecting pipe, 62: Connecting tube, 63a: Resin sheet, 63b: Resin sheet, 71: Mold, 71c: Recess, 71p: Pinch-off part, 72: Mold, 72c: Recess, 72p: Pinch-off part, M: Raw material resin, S: Containment space

Claims (5)

It is a molded product
A hollow resin molded body, a heat insulating member, and a heat storage member are provided.
The heat insulating member is arranged inside the resin molded body and is arranged.
The heat storage member is arranged so as to be in contact with at least one of the heat insulating member and the resin molded body. In the molded product according to claim 1,
The heat insulating member has a recess and is provided with a recess.
The heat storage member is arranged in the recess. In the molded product according to claim 1 or 2.
Assuming that the thickness of the heat insulating member is D and the thickness of the heat storage member is d,
The value of (d / D) is 0.05 to 0.9. In the molded product according to any one of claims 1 to 3.
In a plan view, assuming that the area of the heat insulating member is S1 and the area of the heat storage member is S2,
The value of (S2 / S1) is 0.05 to 0.9. It ’s a heat-insulated container.
It has a storage space that can accommodate articles and is composed of a molded body.
The molded body includes a hollow resin molded body, a heat insulating member, and a heat storage member.
The heat insulating member is arranged inside the resin molded body and is arranged.
The heat storage member is arranged at a position sandwiched between the heat insulating member and the resin molded body.
Those provided so that the heat storage members face each other in the accommodation space.

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