JP3935330B2 - Method and apparatus for manufacturing cold container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for manufacturing a cold container used to accommodate the ice with contained object.
[0002]
[Background Art and Problems to be Solved by the Invention]
Conventionally, as a cold storage container that has been used for storing objects such as fresh fish, fruits and vegetables, fresh foods, medicines, etc., a means for draining ice-melted water is provided for the purpose of storing ice together with the objects to be stored. However, as a cold storage container in which wastewater does not flow out to the outside in the middle of stacked containers so that the wastewater does not contaminate the outer surface of the container during loading or transportation, for example, utility model registration No. 3043521, Kai 2000-264375 was proposed.
[0003]
However, in the case of the above cold storage container, the inner side and the outer side of the container communicate with each other through the drain port, and the temperature inside the container rises when the outside air enters the container, and the cold insulation effect is lowered and the cold insulation is reduced. There was a drawback that time was shortened.
In view of this, a container capable of water sealing the drain outlet by drainage so that the inner side and the outer side of the container are not connected and a method for manufacturing the same have been proposed as Japanese Patent Laid-Open No. 6-56176. In the case of this cold storage container, the drain outlet is sealed with water, preventing the outside air from entering the container and enhancing the cold storage effect, but the water pool level for water sealing is located above the bottom, The product was soaked in ice-melted water, resulting in quality degradation. In addition, in the case of the above-described cold storage container, when forming the water guide hole for sealing the drain port, means for preventing the molding piece for forming the water guide hole from being caught during the mold release is necessary in normal molding. It was. As a means for that, in JP-A-6-56176, a movable molding piece is brought into close contact with the surface of the core mold at the time of mold closing with a wire connected to an air cylinder, and at the time of mold opening (at the time of mold release). Had to be moved to the inner wall of the cavity. Since the control means for such a molding piece must be attached to the outside of the mold, the space between the molds needs to be larger than usual, and the number of molded products is reduced compared to normal molding, This has resulted in a reduction in molding efficiency.
[0004]
Therefore, in the present invention, it has an object to provide a method and apparatus for manufacturing a cold container as can solve all the problems the above mentioned drawbacks of the prior art and inconvenience.
[0005]
[Means for Solving the Problems ]
[0008]
As a method of manufacturing the above-described cold storage container of the present invention, a pipe for forming a drain hole penetrating the container side wall is placed so as to be positioned between the core mold for forming the container and the cavity mold. When the mold is closed, the movable pin that protrudes partially from the pipe is pushed against the pressing force of the spring in the pipe, and the forming core for forming a flexible water guide hole that is connected to the movable pin is inclined from the guide hole of the pipe. After filling the cavity space between the core mold and the cavity mold with pre-expanded resin particles and foaming the container, when the mold is opened, the movable pin is pushed up to the original shape by the spring in the pipe and moved together with the movable pin Characterized in that a cold insulation container in which a drainage hole and a water conduction hole communicated with each other is produced by removing the molding core from the molded water conduction hole and further removing the pipe from the container. A.
[0009]
According to this manufacturing method, the cold storage container having the drain hole penetrated through the side wall of the container by the molding core connected to the pipe and the pin moving inside the pipe, and the water conduction hole communicating with the drain hole is molded and molded by closing the mold. The mold release by opening is performed smoothly, and it becomes easy to manufacture a cold insulated container with water guide holes in an oblique direction.
In addition, as a manufacturing apparatus used for carrying out the above method for manufacturing a cold container, a pipe for forming a drain hole penetrating the side wall of the container is loaded so as to be positioned between the core mold for container molding and the cavity mold. The pipe is provided with a movable pin that is partially protruded from the pipe by the pressing force of the spring. The movable pin is connected to a flexible forming core for forming a water guide hole. Is formed with a guide hole that guides the molding core diagonally downward, and when the mold is closed, the movable pin is pushed into the pipe against the pressing force of the spring in the pipe and guides the molding core. When the mold is opened after foam molding, the movable pin is pushed up to the original shape by the pressing force of the spring, and the molding core can be removed from the molded water guide hole together with the movable pin. It is characterized.
[0010]
According to this manufacturing apparatus, it is possible to provide an apparatus that can also form a water guide hole when molding a container by connecting the molding core to a pin that moves in the pipe, and the molding core is placed in the mold. Because it is installed in a pipe that can be loaded, it becomes a very compact mechanism for forming water conveyance holes, and it can be manufactured in a normal space without taking up much space for the molding die, so it keeps cold without reducing molding efficiency A container can be manufactured.
Further, the invention according to claim 3 that is dependent on claim 2 is formed in the container by removing the pipe from the molded container after the mold is opened, and by removing the molding core. The molding core is combined with the pipe so that the water conveyance hole communicates with each other, and a manufacturing apparatus capable of smoothly communicating the drain hole and the water conveyance hole can be provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be sequentially described below with reference to the drawings.
FIG. 1 and FIG. 2 are cross-sectional views showing a state in which the cold storage containers manufactured by the method of the present invention are stacked. In the case of the cold storage container manufactured by the method of the present invention, an object (not shown) is contained in the container 10. ) And ice (not shown) are accommodated, and the object to be contained is cooled by the ice.
In the container 10, a water reservoir 12 is formed on the container bottom 11 side, and the water level H of the water reservoir 12 is formed to be lower than the uppermost end of the container bottom 11. As a result, the state of the object to be immersed in water is eliminated.
[0012]
Reference numeral 13 in the figure denotes a drainage hole formed downwardly penetrating from the upper end surface 14a of the side wall 14 of the container 10, and the drainage hole 13 and the water introduction hole 15 communicating with the water reservoir 12 are provided near the bottom of the container, in the figure, the side wall. 14 and the bottom portion 11. In the water introduction hole 15, the uppermost end 16 a of the introduction port 16 on the water reservoir 12 side is formed to be lower than the lowermost end 17 a of the outlet port 17 on the drainage hole 13 side. 10 is configured to be water-sealed (sealed with water) and to prevent the outside air from entering the container. With these configurations, the lowermost end 17a of the outlet 17 is at the time of water sealing. It becomes equal to the water level H of the water reservoir 12.
[0013]
Further, the container 10 can be combined so that the container 10 can be covered with the lid body 20 provided with the through hole 23 at a position coinciding with the drain hole 13 provided through the side wall 14. The lid 20 can be used arbitrarily, for example, when it is covered with a necessary individual container 10 (see FIG. 2), or when the uppermost stacked container 10 is covered. Even if the lid 20 is used, the waste water treatment can be performed smoothly.
The container 10 and the lid 20 are preferably made of a synthetic resin, particularly a synthetic resin foam, and the foamed synthetic resin forming the container 10 and the lid 20 is made of pre-expanded particles as a raw material. A molded article obtained by in-mold foam molding is suitable. For example, foamed polystyrene or other known foamed synthetic resins can be used.
[0014]
Next, will be described below a method and apparatus for manufacturing a coercive cold container as described above.
3 to 5 show the process of forming the cold storage container. FIG. 3 shows when the mold is closed, FIG. 4 shows the foam molding after filling the raw material, and FIG. 5 shows the mold after opening.
In the figure, 30 is a core mold, 40 is a cavity mold, and 50 is a cavity space between both molds. Next, 60 is a pipe for forming the drain hole 13 penetrating the side wall 14 of the container 10 described above, and is loaded so as to be positioned between the core mold 30 and the cavity mold 40. The pipe 60 is provided with a movable pin 80 (particularly, see FIG. 5) that is partially protruded from the pipe 60 by the pressing force of the spring 70. The movable pin 80 is formed to be flexible to form a water guide hole. A core 90 is connected, and a guide hole 61 for guiding the molding core 90 obliquely downward is formed in the pipe 60 or a pipe portion directly connected to the pipe 60. The core mold 30 has a protrusion 32 for forming the water reservoir 12, and the guide hole 61 for the molding core 90 faces the protrusion 32. In the figure, reference numeral 100 denotes a setting nut for the pipe 60.
[0015]
A pipe 60 for forming the drainage hole 13 penetrating the container side wall 14 is loaded so as to be positioned in the cavity space 50 between the core mold 30 and the cavity mold 40 for container molding. The projecting movable pin 80 is pushed against the pressing force of the spring 70 in the pipe 60 when the mold is closed, and the forming core 90 for forming a flexible water guide hole connected to the movable pin 80 is inserted into the guide hole of the pipe 60. It protrudes from the diagonal direction from 61 and is made to contact | abut to the protrusion 32 of the core metal mold | die 30 (refer FIG. 3). A pre-foamed resin particle is filled in the cavity space 50 between the core mold 30 and the cavity mold 40 to foam-mold the container 10 (see FIG. 4). When the mold is opened, the movable pin 80 is pushed up to its original shape by the spring 70 in the pipe 60, and the molding core 90 is removed from the molded water guide hole 15 together with the movable pin 80 (see FIG. 5). Further, by removing the pipe 60 from the container 10, it is possible to manufacture by releasing the cold storage container in which the drainage hole 13 is formed and the drainage hole 13 and the water guide hole 15 communicated with each other.
[0016]
In practice, the molding core 90 connected to the movable pin 80 can use a synthetic resin or a hard synthetic rubber as a flexible material, and other materials can be used as long as they have flexibility. .
A cold insulation container in which the water guide holes 15 that can be made to be traces of the exit of the molding core 90 are smoothly produced by the method and apparatus for producing the cold insulation container as described above, and the cold insulation container that is in communication with the drain holes 13 and the water reservoir portion 12 is smoothly manufactured. Since the child can be equipped in the mold, it does not take up a lot of space as a molding die, and the apparatus space of a normal molding die can sufficiently cope with it.
[0017]
[Effect of the invention ]
[0018]
The effect of the method and apparatus for manufacturing a cold container of the present invention, a water seal means, the molding core to form a water guide hole when the container forming the guide hole while utilizing the pressing force of the spring in the pipe Since the water introduction hole forming means is made compact by making it come out and exit from the guide hole, it is possible to prevent a decrease in the molding efficiency of the container, and the cost can be reduced compared to the conventional apparatus having the molding piece in / out means. It is peeled off.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a stacked state of only containers.
FIG. 2 is a cross-sectional view showing a stacked state of containers with lids.
FIG. 3 is a cross-sectional view of the manufacturing apparatus showing when the mold is closed.
FIG. 4 is a cross-sectional view of the manufacturing apparatus showing the foam molding.
FIG. 5 is a cross-sectional view of the manufacturing apparatus after the mold is opened.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Container 11 Bottom part 12 Water reservoir part 13 Drain hole 14 Side wall 14a Side wall upper end surface 15 Water introduction hole 16 Introduction port 16a Inlet port uppermost end 17 Outlet port 17a Outlet lower end 20 Lid 23 Through hole 30 Core mold 40 Cavity mold Mold 50 Cavity space 60 Pipe 61 Guide hole 70 Spring 80 Movable pin 90 Molding core

Claims (3)

  A pipe for forming a drainage hole penetrating the side wall of the container is loaded so as to be positioned between the core mold for container molding and the cavity mold, and a movable pin partially protruding from the pipe is inserted into the pipe when the mold is closed. Pushing the spring against the pressing force of the spring, the molding core for forming the flexible water guide hole connected to the movable pin is projected diagonally from the guide hole of the pipe, and between the core mold and the cavity mold After filling the cavity space with pre-expanded resin particles and foam-molding the container, when opening the mold, the movable pin is pushed up to the original shape by the spring in the pipe, and the molding core together with the movable pin is removed from the formed water guide hole, Furthermore, the manufacturing method of the cold storage container characterized by manufacturing the cold storage container with which the drainage hole penetrated and the water conveyance hole communicated by removing the pipe from the container.   A pipe for forming a drainage hole penetrating the side wall of the container is installed so as to be positioned between the core mold for container molding and the cavity mold, and a part of the pipe protrudes from the pipe with the pressing force of the spring The movable pin is provided, and a flexible forming core for forming a water guide hole is connected to the movable pin, and a guide hole for projecting the forming core obliquely downward is provided below the pipe. When the mold is closed, the movable pin is pushed into the pipe against the pressing force of the spring in the pipe and the molding core is exposed from the guide hole. When the mold is opened after foam molding, the movable pin is the spring. A device for manufacturing a cold-reserving container, wherein the apparatus is pushed up to the original shape by a pressing force of, and is configured so that the molding core can be removed from the molded water guide hole together with the movable pin. After the mold is opened, the pipe is removed from the molded container, and the drain hole formed in the container is in communication with the water guide hole formed in the container by removing the molding core. The child is combined, The manufacturing apparatus of the cold storage container of Claim 2 characterized by the above-mentioned.

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