JP3929341B2 - Method for producing foamed resin molded product for heat insulation container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a coercive warm container resin foam product.
[0002]
[Background Art and Problems to be Solved by the Invention]
Conventionally, various types of foamed resin heat insulation containers suitable for heat insulation lunch boxes and the like have been proposed. For example, what is described in Japanese Utility Model Laid-Open No. 7-4383 is a heat insulation function of a recess serving as each chamber. In order to increase the height, the lid rib is formed high and brought into contact with the holding portion of the container body, but the contact is a contact by butt, and both the container body and the lid are formed of a heat insulating material such as styrene foam. Therefore, the contact accuracy due to the butt tends to be insufficient, and isolation of each room from the other room has been a step further improvement.
[0003]
For this reason, for example, a foamed resin molded product with a skin has begun to be manufactured as disclosed in Japanese Patent Application Laid-Open No. Sho 62-242524. However, because the skin is easily abutted on the inner surface side and the outer surface side from the viewpoint of molding. Although it has been adopted, in the case of a heat insulation container for lunch, etc., the butt part is easily expanded or peeled off due to temperature change or external impact, and the appearance of a part of the core layer serving as an internal heat insulating material is poor. In addition to unsightly things happening, there was a problem of water and foreign matter getting in, and improvements were desired.
[0004]
Therefore, in the present invention is obtained by the invention the end of intensive research a manufacturing method easily provides insulated container for the resin foam product which was superimposed state joining portion of the inner outer skin layer so it can solve the conventional problems described above.
[0005]
[Means for Solving the Problems]
[0008]
With respect to the method for producing a foamed resin molded product for a heat insulation container according to the present invention, a heat insulation container with a skin layer in which an inner skin layer and an outer skin layer are laminated on the surface of a foamed resin molded product to be a core layer A method for producing a foamed resin molded product for an automobile, wherein a skin material serving as one skin layer on an inner surface side and an outer surface side is set as a first step in a main mold serving as a cavity mold or a core mold, and the outer surface of the skin material The movement assist mold is placed on the main mold on the skin material set side so as to be in contact with the portion near the upper edge to regulate the deformation on the upper edge side of the skin material, and then the mold is closed to remove both thermoplastic foam resin particles. The core layer is formed by foam molding by filling in the mold holes between the main molds, and one of the inner and outer skin materials is joined to the core layer, and after opening the mold, the movement assist mold is removed and the previous skin material is Set the skin material as the second step on the other mold that is not set. And after placing the movement auxiliary mold on the other main mold so as to contact the portion near the outer upper end of the skin material and regulating the deformation on the upper end side of the skin material, the mold is closed, The skin material set this time in this mold is joined to the core layer, and the skin materials are superposed on each other in the vicinity of the outer upper end.
[0009]
The method of manufacturing a heat insulating container resin foam product, to the junction of the inner and outer skin layers superimposed state must upper end of the inner and outer skin material is regulated so as not to deform indiscriminately, production of the claim 1 According to the method, in the first stage in which one of the inner and outer skin materials is set, the movement assist die for performing the regulation is disposed on one of the main molds that are the cavity mold and the core mold, and the other of the inner and outer skin materials is set. In the second stage, the upper end side of the inner / outer skin material is reasonably regulated by arranging it on the other side of the main mold so that the upper end side joining portion of the inner / outer skin material can be joined.
[0010]
According to claim 2 particularly dependent on claim 1, the first stage set of the skin material for the present type, the upper edge of the core layer being foamed resin molded skin material to be the inner surface side skin layer on the outside of the core mold A set that protrudes beyond the outer wall surface part, and the second set of skin material for the main mold is to set the outer skin layer as the outer skin layer inside the cavity mold, according to claim 3 is characterized by superposing a protruding portion of the skin material, also depending on claim 1 comprising a first stage set of the skin material for the present type, the outer surface side skin layer on the inner side of the cavity mold The second stage set of the skin material for the main mold is to set the skin material to be the inner skin layer outside the core mold beyond the upper edge of the core layer formed by foaming resin. A set that protrudes to the outer wall , The run-off portions are characterized in that to superimpose the first stage side skin material, including a set of first phase of the skin material on the claims 2 In this type of core mold side, in this type according to claim 3 The first stage set of the skin material for the skin is started from the cavity mold side, and the difference between the inventions according to both claims is that the overlap of the overlapping portions where the skin layers by the inner and outer skin materials are joined is reversed. As a molded product manufactured by both manufacturing methods, the other points remain unchanged.
[0011]
Incidentally, claim 4 when dependent on claim 1 is characterized in that the skin material comprising a skin layer made of a thermoplastic synthetic resin molded sheet, a synthetic resin sheet molded article shape stability In addition to being easy to handle from the point of view of manufacturing and being light, it is advantageous in that it is cheaper and more advantageous than an aluminum molded product.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a plan view of the container body 10, and FIG. 2 shows a cross-sectional view of the container body 10 shown in FIG. .
The configurations of the container body 10 and the lid body 20 are each provided with a skin layer in which a skin layer a on the inner surface side and a skin layer b on the outer surface side are laminated on the surface of the foamed resin molded product to be the core layer C. The molded product is divided into a plurality of chambers d, each chamber d is isolated from the other chambers, and the container body 10 and the lid body 20 are fitted so that they can be maintained in independent heat-retaining states. Various fitting modes are assumed, but one of the outer wall surfaces 11, 21 and the partition walls 12, 22 divided into a plurality of chambers d is a groove e and the other is a tip protrusion. The case of the fitting structure which is the part f and the front-end | tip protrusion part f was inserted in the groove | channel e is shown in figure. In addition, it is possible to employ a fitting structure in which one is a plurality of circular or square holes and the other is a plurality of protrusions corresponding to the hole shape so that they can be fitted to each other.
[0013]
Since the container body 10 and the lid body 20 are fitted in this way, each chamber d is kept in a cold state or a warm state even when the cold food and the warm food are stored in the heat retaining container A of the present invention. Can be maintained. Therefore, it is particularly suitable as a heat retention container for a lunch for transportation.
As can be seen from FIG. 2, the inner skin layer a of the container body 10 and the lid body 20 protrudes beyond the upper edge of the core layer C to the outer wall surface portion, and at the outer wall surface portion of the core layer C. The outer skin layer b and the outer skin layer b are joined together in a superposed state. In this case, the bonding is greatly enhanced as compared with the case where the inner surface side skin layer a and the outer surface side skin layer b are merely abutted.
[0014]
Next, with reference to FIGS. 3 and 4, the container body is a molding method that is a method for producing the container body 10 of the above-described foamed resin insulated container with a skin layer and the foamed resin molded product for the insulated container to be the lid 20. The case where 10 is a molded product will be described sequentially.
First, in the case of FIG. 3, among the cavity mold 40 and the core mold 30 serving as the main mold, the skin material A serving as the inner surface side skin layer a is set in the core mold 30 as the first stage and the outer surface of the skin material A is illustrated. The movement assist mold 50 is placed and fixed on the core mold 30 on the skin material set side so as to be in contact with the portion A1 near the upper end (see FIG. 3A). J indicates the arrangement fixing position, and fasteners such as bolts and nuts are not shown. With this movement assist mold 50, the upper end side of the skin material is preliminarily restricted from being deformed when the mold is closed. Next, the mold is closed, and the thermoplastic foam resin particles are filled into the mold hole between the cavity mold 40 and the core mold 30 to form the core layer C by foam molding, and the inner skin material A is joined to the core layer C. (See FIG. 3B). Next, after the mold is opened (see FIG. 3C), the auxiliary moving mold 50 is removed and the skin material B is set as the second stage in the cavity mold 40 where the previous skin material A is not set and the skin material B The movement assisting die 50 is arranged and fixed on the cavity die 40 so as to contact the portion B1 in the vicinity of the outer upper end of the outer surface of the outer skin B, and the deformation of the upper end side of the skin material B is regulated (see FIG. 3 (d)). It is easy to perform superimposition described later with the skin material A. Subsequently, the mold is closed, and the skin material B set this time in the cavity mold 40 is joined to the core layer C, and the skin materials A and B are superposed on each other at portions A1 and B1 in the vicinity of the outer upper end (FIG. 3). (See (e)). By releasing the molded product in this way, it is possible to provide a strong container body 10 (see FIG. 3F) in which the end portions of the skin materials A and B are superimposed. In addition, the surplus part of the skin material B is excised. The lid 20 can be molded in the same manner as the container body 10.
[0015]
Next, the case of FIG. 4 will be described. The skin material B to be the outer skin layer b is set in the cavity mold 40 as the first stage and is in contact with the portion B1 near the outer upper end of the skin material B. Further, the movement assist mold 50 is placed and fixed on the cavity mold 40 on the skin material set side (see FIG. 4A), and the upper end side of the skin material B is restricted from being deformed. Next, the mold is closed, and the thermoplastic foamed resin particles are filled into the mold holes between the two molds to form the core layer C by foam molding, and the outer surface side skin material B is joined to the core layer C (FIG. 4 ( b)). Next, after the mold is opened (see FIG. 4C), the movement assist mold 50 is removed, and the skin material A is set as the second stage on the core mold 30 where the previous skin material B is not set, and the skin material A The movement assisting die 50 is arranged and fixed on the core die 30 so as to be in contact with the portion A1 in the vicinity of the outer upper end of the outer surface of the skin, and the deformation of the upper end side of the skin material A is regulated (see FIG. 4D). Subsequently, the mold is closed, and the skin material A set this time on the core mold 30 is joined to the core layer C, and the skin materials A and B are superposed on each other at portions A1 and B1 in the vicinity of the outer upper end (FIG. 4). (See (e)).
[0016]
In the case of FIG. 4, the first stage set of the skin material to the mold is different from the molding of FIG. 3 in that the first stage set starts from the cavity mold 40 side, and the upper and lower portions of the overlapping S portion are the case of FIG. It is also different that it is reversed.
In the foamed resin molded product provided by molding as shown in FIGS. 3 and 4 above, the superposed S portion of the skin materials A and B is heated by any one of heat sealing, impulse sealing, ultrasonic bonding, high frequency bonding, and the like. In particular, the impulse seal is suitable for the product of the present invention among the thermal bonding methods. After the overlapped portion is heated and softened by impulse sealing, the overlapped portion is pressed against the wall surface side, and is processed and strengthened so as to be integrated with the overlapped portion.
[0017]
Synthetic resin sheet molded products are preferable as the inner and outer skin materials A and B from the viewpoint of cost and dimensional stability. As the foamed resin to be the core layer C, polystyrene foamed resin beads are used as a raw material, and styrene modified Polyolefin resin foam beads, particularly foam beads made of styrene-modified polyethylene resin are preferred.
Further, as the skin materials A and B for forming the inner and outer skin layers a and b, thermoplastic synthetic resin sheet molded products are preferable, and usual materials such as polypropylene resins, high impact polystyrene, polyethylene, and ethylene / vinyl acetate copolymers are used. A film or sheet having a thickness of about 0.1 to 2 mm is used.
[0018]
The foamed resin molded product for a heat insulation container with a skin produced in this way is used as a container body or a lid, and is excellent in heat insulation, light weight, impact resistance, etc., and is a foamed resin molded product. Since the inner and outer surfaces of the core layer are covered with a skin layer and stable surface properties can be obtained, it can be used effectively as a food transport container, a fresh food cold container, a warm container, etc. It is lightweight and easy to handle, making it an extremely suitable product as a warming return box that is used repeatedly for a certain period of time.
[0019]
【The invention's effect】
The preparation method of the by that holding temperature container foamed resin molded article of the present invention have been mentioned in the section [Means for Solving the Problems], it is to androgynous the following advantages.
[0021]
In the 請 Motomeko 1 of the method of manufacturing the insulated container for the resin foam product according to the present invention, Midari in during closing upper side mold of the inner and outer skin material or the like in order to superimpose state joining portion of the inner and outer skin layer It is necessary to regulate so as not to be deformed, and in the first stage in which one of the inner and outer skin materials is set, the movement assist type that performs the regulation is disposed on one of the main mold that becomes the cavity mold and the core mold, and the inner and outer skin materials are arranged. In the second stage of setting the other side of the mold, it is removed from one of the main molds, and by placing it on the other side of the main mold, the upper end side of the inner and outer skin material is reasonably regulated so as not to be deformed, and the inner and outer skin materials Thus, it is possible to easily perform the joining in which the upper end side joining portion is superimposed, and it is easy to manufacture a molded article having the above-described superposed structure.
In claim 2 , the first set of skin material for the main mold is started from the core mold side, and in claim 3 , the first stage set of skin material for the main mold is started from the cavity mold side. The difference between the inventions according to the claims is that the overlap of the overlapping parts where the skin layers by the inner and outer skin materials are joined is reversed, and the upper end side joining part of the inner and outer skin materials is used as a molded product manufactured by the manufacturing method. It is common in the point which can perform the overlapping strong joining, and there exists the same effect as invention by the above-mentioned Claim 1 .
[0022]
Contact name in the present invention according to claim 4, because those skin material comprising a skin layer made of a thermoplastic synthetic resin molded sheet, the shape that stability is sometimes the light is easy to handle in terms of production In addition to being convenient, it is inexpensive and easy to use.
[Brief description of the drawings]
FIG. 1 is a plan view.
2 is a cross-sectional view obtained by adding a lid cross-sectional view to the cross-sectional view of the container main body taken along the line II-II in FIG. 1;
FIGS. 3A to 3F are partial schematic diagrams showing a manufacturing process. FIGS.
FIGS. 4A to 4F are partial schematic diagrams illustrating a manufacturing process according to a modified example. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Container main body 11 Outer wall part 12 Partition part 20 Lid 21 Outer wall part 22 Partition part a Inner surface side skin layer A Inner surface side skin material b Outer surface side skin layer B Outer surface side skin material C Core layer d Chamber e Groove f Tip protrusion S Superimposed portion 30 of skin layer Core mold 40 Cavity mold 50 Movement assist mold

Claims (4)

  A method for producing a foamed resin molded product for a heat insulating container with a skin layer in which a skin layer on the inner surface side and a skin layer on the outer surface side are laminated on the surface of the foamed resin molded product to be a core layer, the inner surface side The skin material that will be one skin layer on the outer surface side is set as the first stage in the main mold that is a cavity mold or core mold, and the movement assist mold is made to contact the portion near the outer upper end of the skin material. Place in the main mold on the set side to regulate the deformation of the upper end side of the skin material, then close the mold and fill the mold hole between the two molds with the thermoplastic foam resin particles, and foam the core layer The outer skin is joined to the core layer, and after opening the mold, the auxiliary movement mold is removed and the skin material is set as the second stage on the other mold where the previous skin material is not set. Set it so that it touches the part near the outer top edge of the skin material. After the auxiliary mold is placed on the other main mold and the deformation on the upper end side of the skin material is restricted, the mold is closed, and the skin material set this time on the main mold is joined to the core layer, and the skin material A method for producing a foamed resin molded product for a heat-retaining container, wherein the two are superposed on each other in the vicinity of the outer upper end. The first set of skin material for this mold is a set in which the skin material that becomes the inner skin layer on the outer side of the core mold protrudes beyond the upper edge of the core layer formed by foaming resin to the outer wall surface. The second stage set of the skin material for the main mold is characterized in that the skin material that becomes the outer skin layer is set inside the cavity mold and overlapped with the protruding portion of the skin material that becomes the inner skin layer. The method for producing a foamed resin molded product for a heat insulating container according to claim 1 . The first stage set of skin material for the mold consists of setting the skin material that will be the outer skin layer inside the cavity mold, and the second stage set of skin material for the mold is outside the core mold The skin material that will be the inner skin layer is set to protrude beyond the upper edge of the core layer molded with foamed resin to the outer wall surface, and the protruding portion is superimposed on the first stage skin material. The method for producing a foamed resin molded product for a heat insulating container according to claim 1 . The method for producing a foamed resin molded product for a heat-retaining container according to any one of claims 1 to 3 , wherein the skin material serving as the skin layer comprises a thermoplastic synthetic resin sheet molded product.

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