JP4586117B2 - Production apparatus and production method for foam molded container - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a foam molding container, and more particularly to a foam molding container manufacturing apparatus and a manufacturing method that are suitably used as a cold storage container that stores and uses ice together with an object to be stored.

  Conventionally, it is known that foamed containers are manufactured by foam-molding pre-expanded particles in a cavity space formed by a core mold and a cavity mold, and the manufactured containers are lightweight and have a required strength. It is used in many fields because it is equipped. Among them, the frequency of use as a so-called cold storage container in which objects to be stored such as fresh fish, fruits and vegetables, fresh foods, medicines and the like are stored together with ice for transportation and storage is increasing.

  In the case of a cold container, a drainage hole for ice-melted water is often provided in order to accommodate ice together with the object to be accommodated. The drainage hole functions effectively for drainage, but in many cold storage containers, the inside and outside of the container communicate directly with each other through the drainage hole, and external air may enter the container through the drainage hole. . When outside air enters, the temperature in the container rises, the cooling effect is lowered, and the cooling time is shortened. Patent Document 1 discloses an improved cold container that eliminates such drawbacks.

  FIG. 9 shows a cold storage container 10 described in Patent Document 1, in which a water reservoir portion 12 is formed on the container bottom 11 side, and the water hole 13 and the water inside the container S communicate with each other by water (ice-melted water). In addition, the water level H of the water reservoir 12 is designed to be lower than the uppermost end of the container bottom 11, thereby eliminating the possibility that the object to be stored is immersed in water. Specifically, a vertical through hole is formed as a drain hole 13 in the side wall 14 of the container 10, and the water guide hole 15 communicating with the drain hole 13 and the water reservoir 12 is further formed so as to face obliquely downward. The water introduction hole 15 is designed such that the uppermost end 16 a of the introduction port 16 on the water reservoir 12 side is lower than the lowermost end 17 a of the discharge port 17 on the drainage hole 13 side. The position of 17a is designed to be lower than the level of the bottom 11 of the container 10. As a result, water always stays in the water reservoir 12 at the water level H at the lowermost end 17a of the outlet port 17, and the drain hole 13 and the interior S of the container 10 are sealed (sealed with water). At the same time, water above the water level H does not remain in the interior S of the container, and it is eliminated that the object to be contained is immersed in water.

  The above Patent Document 1 further discloses a manufacturing method and apparatus for manufacturing the cold insulation container shown in FIG. FIG. 10 illustrates this, in which 1 is a core mold, 2 is a cavity mold, and 3 is a cavity space between both molds. Reference numeral 4 denotes a pipe for forming a drain hole 13 penetrating the side wall 14 of the container 10 and is loaded so as to be positioned between the core mold 1 and the cavity mold 2. The pipe 4 is provided with a movable pin 6 that is partly protruded from the upper end of the pipe 4 by the pressing force of the spring 5 at all times, and is bent to form a water introduction hole 15 at the lower end of the movable pin 6. A flexible molding core 7 is connected. Further, a guide hole 8 for guiding the molding core 7 obliquely downward is formed in the pipe 4. The core mold 1 has a convex portion 70 for forming the water reservoir portion 12, and the guide hole 8 for the molding core 7 faces the convex portion 70. The lower end side of the pipe 4 is fixed to the cavity mold 2 by a setting nut 9.

  FIG. 10 shows a state in which the mold is closed. The movable pin 6 is pushed down against the spring 5 by the core mold 1, and the molding core 7 is pushed along the guide hole 8 obliquely downward. Then, the tip abuts on the convex portion 70 for forming the water reservoir portion 12. In this state, the pre-expanded particles are expanded, and after foam molding, when the core mold 1 is moved and the mold is opened, the movable pin 6 returns to the original protruding position by the pressing force of the spring 5, and the molding core 7 is also formed. The pipe 4 is accommodated in the pipe 4 while coming out of the water guide hole 15. By taking out the molded product from the cavity mold 2, the drainage hole 13 penetrating in the vertical direction is formed in the side wall 14, and the water introduction hole 15 communicating with the drainage hole 13 and the water reservoir 12 is inclined downward. Thus, the formed foamed container 10 is obtained.

A molding apparatus for a foam-molded container having a configuration substantially similar to the above is also described in Patent Document 2.
JP 2003-40341 A JP 2004-209930 A

  By using the manufacturing apparatus shown in FIG. 10, the side wall shown in FIG. 9 has a first hole (drainage hole 13) penetrating in the vertical direction, and further, the first hole and the accommodation space S are provided. The foam-molded container (cold container 10) having the second hole to be connected (water guide hole 15) can be easily foam-molded. However, the hole forming means loaded between the core mold 1 and the cavity mold 2 to form the first hole and the second hole has a large number of movable parts and a large number of parts. It is complicated. Therefore, maintenance of the apparatus is not easy.

  Further, since the molding core 7 is pushed out when the mold is closed and its tip position is determined, if molding is repeated many times, the molding core 7 is deformed, and the tip of the molding core 7 and the core mold There may be a gap in the contact surface with one convex portion 70. Such a gap becomes a factor that generates burrs around the inlet 16 of the water guide hole 15. Furthermore, since the actual contact surface cannot be seen with the eyes during the molding process, it is necessary to visually check whether the contact surface is in an appropriate state or whether the molding core 7 has been pushed out as expected. However, there are still problems to be solved in terms of quality control of molds and the like.

  The foaming container forming apparatus described in Patent Document 2 has the same disadvantages.

  This invention is made | formed in view of the above situations, and has a 1st hole penetrated to an up-down direction in a side wall part, Furthermore, the 2nd hole which connects this 1st hole and accommodation space is provided. An object of the present invention is to simplify the configuration of a hole forming device provided in the manufacturing apparatus for a foam molded container, to facilitate maintenance, and to perform stable foam molding continuously. Another object of the present invention is to make it possible to visually determine the posture and position of the molding core for molding the second hole during foam molding while the mold is opened, thereby enabling the molding die and molding An object of the present invention is to provide an apparatus for manufacturing a foam-molded container capable of reliably performing quality control of the core. Still another object of the present invention is to provide a manufacturing method for manufacturing a foam-molded container using the above manufacturing apparatus.

  An apparatus for manufacturing a foam-molded container according to the present invention has an accommodation space defined by a side wall and a bottom, and a first hole penetrating in the vertical direction is formed in the side wall, and further, the first hole and the accommodation are accommodated. A manufacturing apparatus including a core mold and a cavity mold for manufacturing a foam-molded container in which a second hole for connecting spaces is formed, and the core mold includes a convex portion for forming the accommodation space, and A member for forming the first hole is a first member that is attached to the core mold. The member for forming the first hole is provided with a protrusion for forming at least one water reservoir projecting downward from the protrusion. And a second member attached to the cavity mold, the first member has a lower end surface located higher than the bottom surface of the water pool forming convex portion, and the lower end surface is provided with the second hole. Molding with flexibility to ensure space One end of the child is detachably attached, and in the attached state, the other end of the molding core is positioned in a posture in contact with the bottom surface of the water pool forming convex portion, When the first member and the second member are closed, the lower end surface and the upper end surface thereof are in contact with each other so as to secure a space for the first hole. The member is configured to be able to be extracted from the second hole and the first hole in which the molding core is formed while moving in a direction away from the second member together with the core mold. .

  In this device, when the flexible molding core for the second hole is attached to the lower end surface of the first member having one end attached to the core mold, the other end side is formed into the core mold. The first member is formed so that its lower end surface is positioned higher than the bottom surface of the puddle forming convex portion. Thus, the molding core attached to the core mold is in a state of being set at a predetermined angle and posture required at the time of foam molding at that time, that is, at a predetermined angle.

  At the time of molding, the core mold is matched with the cavity mold, and the pre-expanded particles are filled in the cavity space formed between the molds, and the mold is closed. In this process, Patent Document 1 or Patent Document 2 is used. As in the manufacturing apparatus described in 1), the movement for feeding the molding core with the mold closing is not required. The molding core is subjected to the steps of filling pre-foamed particles, closing the mold, and foam molding while maintaining the initial posture set with the mold opened. This greatly simplifies the entire device for hole formation.

  Further, since the posture of the molding core at the time of molding can be seen from the outside with the mold opened, there is a gap on the contact surface between the molding core and the projection for forming the water pool for some reason. Even if such is occurring, it can be confirmed before the mold is clamped, and quality control of the mold, the molding core, etc. is facilitated. As a result, the yield of molded products is also improved. If inconvenience occurs on the molding core side, the inconvenient molding core can be removed from the first member and replaced with a new one, which is extremely easy to deal with.

  When the mold is opened, the molding core rises together with the first member and is extracted from the second hole, and is also extracted from the first hole. After coming out, it is easily restored to its original posture, that is, the posture in which the other end side is in contact with the bottom surface of the water pool forming convex portion formed in the core mold by the elastic force of the molding core itself. And prepare for the next molding.

  In the manufacturing apparatus of the present invention, preferably, the second member attached to the cavity mold is slidable in the vertical direction with respect to the cavity mold via the spring member. With this configuration, the pre-expanded particles can be filled into the cavity space with a slight gap between the core mold and the cavity mold, and the so-called cracking operation is performed, in which the final mold is closed after filling. Can be performed.

  The present invention uses the manufacturing apparatus described above to have an accommodation space defined by a side wall and a bottom, and the side wall is formed with a first hole penetrating in the vertical direction. Also disclosed is a method of manufacturing a foam molded container in which second holes connecting the accommodation spaces are formed. Therefore, first, a flexible molding core having one end detachably attached to the lower end surface of the first member and the other end abutted against the bottom surface of the water pool forming convex portion Prepare the core mold positioned in step 1. The core mold is matched with the cavity mold, the pre-expanded particles are filled in the cavity space formed between the molds, the mold is closed, and foam molding is performed according to a conventional method. When opening the mold after foam molding, the first member is moved together with the core mold in a direction away from the second member. As a result, the molding core is extracted from the formed second hole, and is also extracted from the molded first hole together with the first member. Thereafter, the second member is extracted from the first hole formed together with the cavity mold. As described above, in the core mold, the molding core extracted from the first hole of the molded product quickly returns to the initial position by its own elastic force, so that it can be prepared for the next molding as it is.

  In the production apparatus and production method of the present invention, the molding core has flexibility, heat resistance against heat during foam molding, and is formed into a foam molded product when the mold is opened after foam molding. It is possible to manufacture with an appropriate material on condition that the surface friction resistance generated between the second hole and the second hole is strong enough to be extracted without being damaged. Examples include silicon resin, natural rubber, and synthetic rubber. Of these, silicone resins are preferred from the viewpoints of heat resistance, flexibility, resilience, and strength.

  When the molding core is made of a material having a large surface frictional resistance with the foam-molded container, when the molding core is pulled out from the second hole formed in the foam molded product In addition, there is a risk that chipping may occur on the side of the foamed molded product, particularly in the vicinity of the upper portion of the second hole due to friction. When the foamed molded product is a foamed polystyrene product and the molding core is a silicon resin, the surface frictional resistance of the silicon resin against the foamed polystyrene has a slightly large value, and such chipping may occur. If foam pieces (foreign matter) generated due to chipping remain in the molded container, it will be mixed with food and other contents when used as a cold storage container. Work to remove is necessary.

  In such a situation, as the molding core, one having a structure in which materials having different surface friction resistances with respect to the foam molded container to be manufactured are laminated, and the material having the smaller surface friction resistance as the first member side, The one end of the molding core is detachably attached to the lower end surface of one member, which is effectively eliminated. The material with the higher surface friction resistance and the material with the lower surface friction resistance may have a structure integrated by sticking or the like, and are simply laminated so that slipping occurs between them when bent. It may be a configuration.

  When a molding core having this configuration is used, the surface friction resistance between the foamed molded product when the molding core is pulled out can be reduced, so that the occurrence of chipping due to the friction resistance between the two can be largely avoided. can do.

  The material with the smaller surface friction resistance is a metal material such as polypropylene resin, tetrafluoroethylene resin, or stainless steel sheet that has low surface friction resistance and high tensile and tear strength. It is preferable because it is not damaged by the resistance applied to. Among these, tetrafluoroethylene resin is preferable because it is easy to process and has high bending strength, and can be used as a molding core by being thinned to about 0.1 to 3 mm (flexibility). Can also be provided. If it is thinner than 0.1 mm, there is a risk of damage due to resistance when it is pulled out. If it is thicker than 3.0 mm, sufficient flexibility cannot be obtained, and the resistance when pulling out increases conversely. Resulting in.

  In this case, it is preferable to use silicon resin as the material having the higher surface frictional resistance. Even if the cross section is large enough to secure the cross sectional area of the second hole, the silicone resin has sufficient flexibility and is suitable as a material constituting the main body portion of the molding core. However, the tear strength of the silicone resin is not sufficient, and the silicone resin may be damaged by repeated use. By laminating a thin plate-like ethylene tetrafluoride resin sheet on the surface side (extraction direction side) of the silicon resin, it becomes possible to prolong the life of the silicon resin that is the main part of the molding core. Further, since the frictional resistance of the tetrafluoroethylene resin is small, it is possible to avoid generation of foam pieces of the foam molded product.

  According to the present invention, the side wall portion has the first hole functioning as a drainage hole penetrating in the vertical direction, and further has the second hole functioning as a water guide hole connecting the first hole and the accommodation space. In the apparatus for manufacturing a foam molded container, the hole forming apparatus provided therein can be further simplified. In addition, since the orientation and position of the molding core for molding the second hole during foam molding can be determined with the mold open, that is, visible from the outside, quality control of the molding die and the molding core can be performed. It can be done reliably.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, a case of manufacturing a cold storage container having the same shape as that shown in FIG. 9 will be described as an example. Therefore, the core mold and the cavity mold are substantially the same as those shown in FIG. 10 except for the hole forming device, and the members having the same functions are the same as those used in FIGS. The same reference numerals are attached. Of course, the container and the mold to be manufactured are not limited to this. In the accompanying drawings, FIG. 1 is a view showing a hole forming apparatus used in the present invention together with a cold container after being formed, and FIGS. 2, 3, and 4 sequentially show a forming procedure using a forming die. FIG. 5 is a cross-sectional view showing the main part of the molded cold-insulated container.

  In the present invention, the hole forming apparatus A forms the first member 30 and the second member 40 for forming the drain hole 13 as the first hole, and the water guide hole 15 as the second hole. It consists of a molding core 50. The first member 30 and the second member 40 are cylindrical in this example, the first member 30 is attached to the core mold 1, and the second member 40 is attached to the cavity mold 2.

  An inner screw 31 for screwing to the core mold 1 is formed at the upper end portion of the first member 30, and a concave groove 33 for mounting the molding core 50 is formed at the lower end surface 32. A screw hole 34 is cut in the bottom surface of the concave groove 33, and one end of the molding core 50 is detachably attached by a screw 35. In addition, the position of the screw | thread 35 can provide the mold release (extraction) of the shaping | molding core 50 more easily by providing in the position biased to the cavity type | mold side as shown in FIGS. When the first member 30 is attached to the upper flange 61 of the core mold 1 as will be described later, the lower end surface 32 of the first member 30 is formed in the core mold 1 to form the water pool portion 12 of the cold container 10. The length is higher than the bottom surface level of the water reservoir forming convex portion 70 (see FIG. 2 and the like).

  The molding core 50 is a member having a rectangular cross section, and is made of a flexible material such as a silicon resin. The length of the molding core 50 is set to a length that allows the tip 51 to enter the bottom surface of the water reservoir forming convex portion 70 formed in the core mold 1 in a state of being attached to the concave groove 33. In addition, it is not essential that the shape of the molding core 50 is a rectangular cross section, and it may be a circular cross section, an elliptical shape, or the like. In that case, the cross-sectional shape of the concave groove 33 formed in the lower end portion 32 of the first member 30 is changed to a shape that can be accommodated in a state where it is in close contact with the shape of the molding core 50. As shown in FIG. 1, the molding core 50 is maintained at an angle of approximately 90 ° with respect to the axis of the first member 30 unless an external force is applied in a state where it is attached to the lower end portion 32 of the first member 30. ing.

  The upper surface 41 of the second member 40 is a surface that can contact the lower surface 32 of the first member 30 in close contact. A vertical hole 42 is formed on the lower end surface side, and a screw 44 is slidable vertically in an attachment hole 45 formed in the cavity mold 2 with a spring 43 interposed in the vertical hole 42 as will be described later. It is attached with.

  In molding, the first member 30 is attached to the core mold 1, and the second member 40 is attached to the cavity mold 2. As shown in FIG. 2, the core mold 1 forms a convex portion 60 for forming the accommodation space S of the cold container 10 and at least one water pool portion protruding downward from the convex portion 60. And a puddle portion 70 for forming a water pool portion. The core mold 1 includes an upper flange 61 that closes the cavity space 3 formed by the core mold 1 and the cavity mold 2, and the upper end of the first member 30 is fixed to the back surface of the upper flange 61 by a screw 62. Yes. At this time, the molding core 50 attached to the lower end surface 32 of the first member 30 is attached so that the tip 51 side faces the direction of the water reservoir forming convex portion 70. The position of the lower end surface 32 of the first member 30 and the length of the molding core 50 are set as described above. When the first member 30 is attached to the core mold 1, as shown in FIG. The entire core 50 is inclined downward, and its free end (tip 51) is in an attitude that enters the bottom surface of the water reservoir forming convex portion 70.

  FIG. 6 shows an enlarged view of the water reservoir forming convex portion 70. In this example, the convex part 70 is provided with a concave part 71 on the bottom surface, and the free end (tip 51) of the hollow core 50 enters therein, whereby the posture of the molding core 50 is stably maintained. . Further, in order to make it easy for the free end of the molding core 50 to enter the recessed portion 71, it is also desirable to provide an outwardly expanding taper on at least the left and right side walls of the recessed portion 71. In addition, on the condition that the tip 51 of the molding core 50 is stably held on the bottom surface portion of the water reservoir forming convex portion 70, such a recessed portion 71 may be omitted, and the left and right side walls are omitted. The concave portion 71 having the shape described above may be used. In the illustrated example, a triangular wing piece 72 is integrally formed inside the water reservoir forming convex portion 70, and this wing piece 72 is water (ice-melted water) in the water reservoir portion 12 of the cold storage container 10. The flow path 12a (see FIG. 1) into which the water enters is formed, and by forming such a narrow flow path 12a, for example, fish scale enters the water reservoir 12, and is the second hole. It is possible to effectively prevent the water guide hole 15 from being blocked.

  As described above, the second member 40 is slidably attached in the attachment hole 45 formed in the cavity mold 2. In other words, the spring 43 is disposed between the attachment hole 45 and the vertical hole 42 formed on the lower end surface side of the second member 40, and is connected to the cavity mold 2 by a screw or a pin 44.

  In the state where the first member 30 having the molding core 50 attached to the lower end surface is attached to the core die 1 as described above, and the second member 30 is attached to the cavity die 2 as described above, the core die 1 and the cavity The mold 2 is matched with the mold, and the pre-expanded particles P are filled in the cavity space 3 formed between the molds by a conventional method, the mold is closed, and foam molding is performed. FIG. 3 shows a state during foam molding. In the above mold, the second member 40 can be slid up and down via the spring 43, and can be overfilled to perform a so-called cracking operation. As shown in the figure, the first member 30 and the second member 40 are integrally located in the vertical direction in the region to be the drain hole 13 (first hole), and the water guide hole 15 (second hole). The molding core 50 in a state of being inclined downward is located at a position to be a hole.

  In the example shown in the drawing, the lower end surface of the first member 30 and the upper end surface of the second member 40 are horizontal contact surfaces. It can also be set as the surface which inclines diagonally toward the position which should become a hole. Thereby, the molding core 50 can be in a posture inclined downward in a more comfortable state.

  After completion of the molding process, the core mold 1 is moved to open the mold. As the core mold 1 moves, the first member 30 rises, and the molding core 50 rises together with the first member 30. In the process, the molding core 50 is gradually extracted from the water guide hole 15 while deforming itself, and further, as shown in FIG. 4, the space as the drain hole 13 formed by the first member 30 rising. It is extracted while moving together with the first member 30. When the core mold 1 is further raised, all of the first member 30 and the molding core 50 are extracted from the space of the drain hole 13, and then the drain hole in which the second member 40 is molded together with the cavity mold 2 By extracting from 13, the cold-reserving container 10 whose principal part is shown in cross section in FIG. 5 is obtained.

  FIG. 7 shows the molding core 50A of the second embodiment together with the first member 30 for forming the drain hole 13 which is the first hole described above. Although the overall shape of the molding core 50A is the same as that of the molding core 50 described above, the molding core 50A is formed as a laminate of the first flexible member 52 and the second flexible member 53 laminated thereon. It differs in that it is configured. In this example, the first flexible member 52 is made of silicon resin, and has a cross section that is approximately the same size as the cross section of the water conveyance hole 15 (second hole) formed in the cold insulation container 10. Thus, the main body portion of the molding core 50A is configured. The second flexible member 53 is made of a tetrafluoroethylene resin sheet, which is a material having a smaller surface frictional resistance against the cold container 10 than the first flexible member 52 (in this case, silicon resin), It is thinner than the first flexible member 52 and has a thickness of about 0.1 to 3.0 mm.

  The mounting manner of the molding core 50A with respect to the first member 30 is the same as that of the molding core 50. The molding core 50A is formed on the lower end surface 32 of the first member 30 with the second flexible member 53 as the upper surface side. One end of each is detachably attached with a screw 35.

  The manufacturing process of the cold container 10 when the molding core 50A is used is the same as that of the molding core 50 described above, and detailed description thereof is omitted. FIG. 8 is a view corresponding to FIG. 4 described above. As the drain hole 13 formed by the first member 30 rising and the first member 31 rising together with the movement of the core mold 1 after completion of the molding process. The molding core 50 </ b> A is extracted while moving together with the first member 30 in the space. Before the molding core 50A arrives at the position shown in FIG. 8, the molding core 50A is gradually pulled out from the water guide hole 15 (second hole) while deforming itself. In the process, the drainage of the water guide hole 15 is performed. Particularly strong contact is made with the upper edge of the outlet port 17 on the hole 13 side. However, in the molding core 50A, the second flexible member 53 made of a tetrafluoroethylene resin sheet having a low surface friction resistance is laminated on the upper surface side, and the foamed resin in that portion is chipped and scattered by the contact friction resistance. It is possible to effectively prevent such a situation from occurring.

The figure which shows the hole formation apparatus used with the manufacturing apparatus of the foam molding container by this invention with the cold storage container after shaping | molding. It is a figure explaining the procedure which manufactures a container using the manufacturing apparatus of the foam-molded container by this invention, and shows the state before filling with pre-expanded particle. It is a figure following FIG. 2, and shows the state after mold closing. It is a figure following FIG. 3, and shows the state which opens a type | mold after shaping | molding. Sectional drawing which shows the principal part of the shape | molded container. The figure which expands and shows the part of the water reservoir part formation convex part in a cavity type | mold. The figure for demonstrating the shaping | molding core of a 2nd form. The figure corresponded in FIG. 4 for demonstrating the process in which a container is manufactured using the shaping | molding core of a 2nd form. The figure explaining an example of the conventional cold storage container. The figure explaining the apparatus for manufacturing the cold storage container shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS A ... Hole formation apparatus, 1 ... Core type, 2 ... Cavity type, 3 ... Cavity space, 10 ... Container, 11 ... Bottom surface, 12 ... Water reservoir, 13 ... Drainage hole (1st hole), 15 ... Water conveyance hole ( Second hole), 30... First member for forming the first hole, 40... Second member for forming the second hole, 50... Molding core, 50 A. Molding core, 51 ... tip of molding core, 52 ... first flexible member having a large surface friction resistance constituting the molding core of the second form, 53 ... constituting the molding core of the second form 2nd flexible member with small surface frictional resistance, 60 ... Convex part for forming accommodation space, 70 ... Convex part for water pool part formation

Claims (7)

The side wall has a receiving space defined by a bottom and a first hole penetrating in the vertical direction is formed in the side wall, and further, a second hole is formed to connect the first hole and the receiving space. A manufacturing apparatus including a core mold and a cavity mold for manufacturing a foam molded container,
The core mold includes a convex portion for forming the accommodation space, and a convex portion for forming a water reservoir portion for forming at least one water reservoir portion protruding downward from the convex portion,
The member for forming the first hole comprises a first member attached to the core mold and a second member attached to the cavity mold,
The first member has a lower end surface positioned higher than the bottom surface of the water reservoir forming convex portion, and has a flexibility for securing a space for the second hole on the lower end surface. One end of the core is detachably attached,
In the mounted state, the other end of the molding core is positioned in a posture in contact with the bottom surface of the water pool portion forming convex portion,
When the mold is closed, the lower and upper end surfaces of the first member and the second member are in contact with each other to secure a space for the first hole.
At the time of mold opening after foam molding, the first member can be extracted from the second hole and the first hole in which the molding core is formed while moving in a direction away from the second member together with the core mold. An apparatus for manufacturing a foam-molded container, characterized in that the apparatus can be made.   The apparatus for manufacturing a foam-molded container according to claim 1, wherein the second member attached to the cavity mold is slidable in the vertical direction with respect to the cavity mold via a spring member.   As the molding core, one having a structure in which materials having different surface friction resistances to the foam-molded container to be manufactured are stacked is used, and the material having the smaller surface friction resistance is the first member side, and the lower end surface of the first member The foam molding container manufacturing apparatus according to claim 1, wherein one end of the molding core is detachably attached to the molding core.   The molding core in which the material with the smaller frictional resistance among the materials constituting the molding core is a polypropylene resin, a fluorine resin, or a metal material is used. The manufacturing apparatus of the foam-molded container as described.   A material having a higher frictional resistance is silicon resin, and a material having a lower frictional resistance is a molding core in which the material is a tetrafluoroethylene resin having a thickness in the range of about 0.1 to 3.0 mm. The apparatus for producing a foam-molded container according to claim 4. Using the foam-molded container manufacturing apparatus according to any one of claims 1 to 5, the container has an accommodation space defined by a side wall and a bottom, and a first hole penetrating in the vertical direction is formed in the side wall. Furthermore, a method of manufacturing a foam molded container in which a second hole connecting the first hole and the accommodation space is formed,
A core mold is prepared in which one end of a flexible molding core is detachably attached to the lower end surface of the first member, and the other end is positioned in contact with the bottom surface of the water reservoir forming convex portion. The pre-expanded particles are filled in the cavity space formed between the core mold and the cavity mold, the mold is closed, the foam molding is performed, and the first member is the core mold when the mold is opened after the foam molding. At the same time, it moves away from the second member, and the molding core is extracted from the formed second hole. Further, the first member and the molding core are extracted from the molded first hole, and the second member is removed from the cavity. A method for producing a foam-molded container, comprising: extracting from a first hole molded together with a mold.   A molding core having a structure in which materials having different surface friction resistances with respect to the foam molded container to be manufactured are laminated so as to be drawn out from the first and second holes formed with the material having the smaller surface friction resistance. The method for producing a foam-molded container according to claim 6, wherein the foam-molded container is used.

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