JP4442205B2 - Foamed synthetic resin drainage container, manufacturing apparatus and manufacturing method thereof - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a foamed synthetic resin drainage container capable of draining ice-melt water when it is used as a cold storage container together with an object to be accommodated, a manufacturing apparatus and a manufacturing method thereof.

  Conventionally, ice containers are often used together with the objects to be stored and used, such as fish shellfish, fresh vegetables and fruit vegetables. There is a need to. Examples of such a cold-reserving container in consideration of not contaminating the outer surface of the container on which iced water has been piled up during storage and transportation include Japanese Utility Model Publication No. 1-12142 (Patent Document 1) and Japanese Patent Laid-Open No. 2001-2001. 158051 (patent document 2) etc. are proposed.

  However, these cold storage containers have a drawback in that it is difficult to maintain freshness due to a decrease in the cold storage effect due to inflow of outside air into the container because the inside and outside of the container communicate with each other through the drain port. For this reason, attempts have been made for a container capable of sealing a drain outlet and its manufacturing method so that the inside and outside of the container do not communicate with each other. For example, in the container of Japanese Patent Application Laid-Open No. 2003-40341 (Patent Document 3), a water guide hole capable of water sealing is adopted as a drain outlet, but a spring is used to form such a water sealing structure. Special molding means with a special shape having a movable part with a complicated structure, such as a movable movable pin and a molding core connected to the movable pin, are necessary, and there are many points that are not sufficiently practical.

No. 1-12142 JP 2001-158051 A JP 2003-40341 A

    A molding apparatus that molds a container having a water-sealing structure for draining the outer surface of the container on which the ice-melting water is stacked so as not to contaminate and preventing the circulation of the air inside and outside the container and maintaining the cold insulation effect for a long time. As described above, a complicated mechanism having a movable part and a device that makes it possible are required. However, although these complicated mechanisms and devices have been devised considerably, problems such as fatigue and wear in moving parts are likely to occur as they are operated for a long time, and the device needs to be repaired or replaced. It becomes. For this reason, although the obtained container has a favorable effect, productivity is inferior and, as a result, rebounds on cost.

The present invention solves the above-described problem, and (1) a sealing portion that seals a part of a lower portion of a drainage drain hole penetrating from the upper end surface of the container side wall to the lower end surface is provided. A water seal weir protruding upward from the drain well is provided at the upper end, and the upper surface of the sealing portion communicates with a water reservoir in the container via a water guide hole provided below the side wall of the container The foamed synthetic resin drainage container is made to function as a water seal portion constituted by the water seal weir, the upper surface of the seal portion, and the water guide hole.
(2) The foamed synthetic resin drainage container according to (1), wherein the water guide hole is formed in parallel with the upper surface of the sealing portion.
(3) The foamed synthetic resin drainage container according to (1) or (2), wherein the water level of the water reservoir is formed lower than the bottom surface in the container.
(4) The foamed synthetic resin drainage container according to any one of (1) to (3), wherein the container is closed with a lid provided with a through hole at a position that matches the drainage pit that penetrates the side wall of the container. .
(5) Between the core mold for container molding and the cavity mold, a columnar piece and a columnar lower piece for forming a drainage hole penetrating from the upper end surface to the lower end surface of the container side wall are loaded. A length for forming a sealing portion for sealing a part of the lower portion of the drainage pit hole, and further, a water seal weir forming notch portion is provided on the lower end surface of the columnar piece to form a water reservoir portion of the core mold An apparatus for producing a foamed synthetic resin drainage container, wherein a tongue-shaped piece having a length that extends from a convex portion to a columnar piece is fixed to the water reservoir forming convex portion.
(6) The manufacturing apparatus according to (5), wherein the flexible tongue-shaped piece is a heat-resistant synthetic resin.
(7) The manufacturing apparatus according to (6), wherein the heat-resistant synthetic resin is silicon rubber.
(8) The manufacturing apparatus according to any one of (5) to (7), wherein the flexible tongue-shaped piece is plate-shaped or columnar.

  (9) A drainage pit formation columnar piece having a water seal dam formation cutout at the lower end and a columnar lower piece are loaded so as to be positioned between a core mold for container molding and a cavity mold, The core mold has a structure in which a flexible tongue-shaped piece having a length extending from the water reservoir forming convex portion to the drainage well forming columnar piece is fixed to the water reservoir forming convex portion. After the foaming resin particles are filled in the mold space constituted by the cavity mold and heated and melted, foam molding is performed. A method for producing a foamed synthetic resin drainage container, wherein a tongue-shaped piece is detached from a water guide hole communicating with a water reservoir in the container.

According to the present invention, the following effects can be obtained.
It is possible to easily form a foamed resin container that can be drained so as not to contaminate the outer surface of the container on which the deicing water is stacked and has a good water sealing function.

  The molding apparatus for molding a foamed resin container according to the present invention does not require a complicated mechanism having a movable part, and can be molded with a simple mechanism. The problem is unlikely to occur. For this reason, the obtained container has excellent performance, and is excellent in productivity and extremely useful industrially. Furthermore, the bendable tongue-shaped piece of the present invention corresponding to the conventional movable part can be replaced with only the tongue-shaped piece very easily and inexpensively even when damaged by prolonged use.

  The foamed resin for molding the foamed resin container of the present invention is produced by adding a foaming agent by impregnation or the like to a polystyrene resin represented by polystyrene or a polyolefin resin represented by polyethylene, polypropylene, or the like. This is foamed with a heat medium such as water vapor and molded. In many cases, the foamable resin is in the form of particles and is used for in-mold molding with or without pre-foaming. A mold space constituted by a core mold and a cavity mold is filled with the particulate foamable resin, and heated and melted using a heat medium such as water vapor to form a container.

  Although the Example which shows the embodiment about the container made from the foamed resin of this invention, its manufacturing apparatus, and a manufacturing method is described below, this invention is not restrict | limited to these embodiments.

  FIG. 1 is a plan view showing a corner portion 2 of a foamed resin container 1 of the present invention. As can be understood from FIG. 2 showing the AA side section and FIG. 3A showing the BB side section, the container side wall 3 of the corner 2 has an upper end surface 4 of the container side wall 3. A drainage pit 6 penetrating from the bottom to the lower end surface 5 is provided.

  However, as shown in FIG. 2 and the subsequent drawings, the drain well 6 does not penetrate from the upper end surface 4 to the lower end surface 5 of the container side wall 3 with the same diameter. It is sealed by the sealing part 7. Along with such a configuration, a water seal weir 10 protruding upward is provided at the end 9 of the upper surface 8 of the sealing portion 7.

  As shown in FIGS. 2 and 3, the upper surface 8 of the sealing portion 7 communicates with the water reservoir 31 in the container through a water introduction hole 32 formed in the lower portion of the container side wall 3. That is, the water guide hole 32 is configured to penetrate the container side wall 3 ′ existing between the water reservoir 31 in the container and the drain well 6, and the bottom surface of the water guide hole 32 is the top surface of the sealing portion 7. It is a structure that is connected to 8 in a continuous manner. In the water sealing portion 33 constituted by the water seal weir 10, the upper surface 8 of the sealing portion 7, and the water guide hole 32, the ice melt water in the container stays, and the drain well 6 and the water reservoir in the container are stored. A water-sealed structure that prevents free air flow with the part 31 is formed. In addition, FIG.3 (b) is a reverse view of the site | part corresponding to Fig.3 (a).

  In FIG. 1 and FIG. 7 and the like, 13 is a groove showing a trace of a tongue-like piece 60 described later, and 14 is a screw, screw or the like 59 which is a means for fixing the tongue-like piece 60. It is a recessed part which shows a trace.

  FIG. 4 is a cross-sectional view showing a cross section of a mold for molding the container of the present invention. A molding space 42 is formed by the core mold 40 and the cavity mold 41. The molding space 42 is loaded with a columnar piece 50 and a columnar lower piece 51 for forming the drain hole 6. The columnar piece 50 is fixed to the core mold 40 with screws 52. This columnar piece 50 does not reach the lower end surface 5 of the container in order to form the water sealing portion 33 such as the sealing portion 7 and the water seal weir 10, and is long enough to be flush with the lower surface of the tongue-like piece 60. Is configured. And the lower end surface of the columnar piece 50 forms the upper surface 8 of the sealing part 7 of the container shape | molded in contact therewith. Further, in order to form the water seal weir 10 at the lower end 53 of the columnar piece 50, a water seal weir forming notch 71 (described later) is provided above the height of the water seal weir 10. The position of the height of the water seal weir 10 is indicated by a dotted line in FIG. 2, FIG. 4, FIG. If the height of the water seal weir 10 is set somewhat lower than the level of the inner bottom surface of the container, the water sealing mechanism of the present invention can be used even when only a small amount of deiced water stays in the water reservoir 31. This is a preferred embodiment because it functions effectively.

  On the other hand, below the columnar piece 50, a columnar lower piece 51 is loaded so as to be in contact with the lower end 53 of the columnar piece 50 during mold clamping in order to allow the drainage pit 6 to penetrate to the container lower end surface 5. The columnar lower piece 51 is fastened with a screw 53 so as to slide up and down via a spring 56. This is because when the core mold 40 and the cavity mold 41 are clamped to form the molding space 42, the columnar piece 50 and the columnar lower piece 51 do not come into strong contact with each other and the molding apparatus is not destroyed. This is to enable a simple contact. The diameter of the columnar lower piece 51 is made smaller than the diameter of the columnar piece 50. This is because it is necessary to form the sealing portion 7 at the lower end 53 of the columnar piece 50. Therefore, the diameter of the columnar lower piece 51 is naturally determined from the diameter of the columnar piece 50 and the sizes of the sealing portion 7 and the water seal weir 10.

  FIG. 5 shows the same cross-sectional structure of the mold as in FIG. 4, but one difference is an example in which the columnar piece 50 is fixed by a screw 53 so as to slide up and down via a spring 56. Is shown. Thus, an elastic body such as a spring provided to mitigate the impact at the time of mold clamping may be applied to either the core mold 40 or the cavity mold 41, and there is a particular restriction on means for mitigating such an impact. Do not mean.

  The cross-sectional shapes of the columnar piece 50 and the columnar lower piece 51 are not particularly limited, but are preferably rectangular, elliptical, or circular in terms of ease of manufacture and operability. FIG. 1 shows an example of a rectangle, and FIG. 7 shows an example of a columnar piece 50 having a shape close to an ellipse with a reduced central portion.

  FIG. 8 is a partial cross-sectional view illustrating the lower end 53 of the described columnar piece 50 and the upper portion of the columnar lower piece 51 in an enlarged manner. That is, the lower end 53 of the columnar piece 50 includes a portion 70 forming the upper surface 8 of the sealing portion 7, a water seal dam forming cutout portion 71, and a portion of a contact portion 72 with the columnar lower piece 51. Is done. Then, behind the columnar piece 50, a tongue-like piece 60 is disposed at a position indicated by a dotted line, and a water guide hole 32 is formed.

  Returning to the description of FIG. 4 again, the tongue-shaped piece 60 is fixed to the water reservoir forming convex portion 58 of the core mold 40 by an appropriate means 59 such as a screw or a screw. Examples of the material of the tongue-shaped piece 60 include urethane rubber and silicon rubber, among which silicon rubber can be particularly preferably used. The length of the tongue-shaped piece 60 is a length from the water reservoir forming convex part 58 to the columnar piece 50. The tongue-shaped piece 60 functions for the purpose of penetrating the container side wall 3 ′ existing between the water reservoir 31 in the container and the drain hole 6 and providing the water introduction hole 32. The cross-sectional shape of the tongue-shaped piece 60 is not particularly limited as long as the water guide holes 32 can be formed, but is preferably a flat rectangular plate or column.

  Since the tongue-shaped piece 60 is made of a flexible heat-resistant synthetic resin such as silicon rubber, it can be easily removed from the container, which is a molded product, at the time of mold release. Therefore, it does not require a complicated apparatus having many moving parts as in the prior art, and can be easily and highly reliable and continuously performed for a long time. When the tongue-shaped piece 60 is damaged, only the tongue-shaped piece 60 needs to be replaced, which is very simple and inexpensive.

  Next, the manufacturing method of the foaming synthetic resin drainage container using the shaping | molding apparatus of this invention is demonstrated.

  As described above, the core mold 40 in which the flexible tongue-shaped piece 60 having a length extending from the water reservoir forming convex portion 58 to the drain hole forming columnar piece 50 is fixed to the water reservoir forming convex portion 58. Then, a molding space 42 is formed by the cavity mold 41 corresponding to the core mold 40. A drainage pit formation columnar piece 50 having a notch for forming a water seal dam at the lower end 53 and a columnar lower piece 51 are loaded so as to be positioned between the core mold 40 and the cavity mold 41 for forming the container. The mold space 42 is filled with expandable resin particles that have been pre-foamed or not pre-foamed, and are subjected to foam molding by heating and melting with a heating medium such as water vapor. Then, after cooling for a necessary time, the mold is opened and the container which is a foamed molded product is taken out from the mold.

  At this time, since the tongue-like piece 60 is made of a flexible heat-resistant synthetic resin such as silicon rubber, the tongue-like piece 60 and the container can be freely deformed by the free deformation of the tongue-like piece 60 when the mold is opened. The tongue-shaped piece 30 can be easily detached or removed from the water guide hole 32 communicating with the inner water reservoir 31. For this reason, a simple mold opening is enabled without requiring a mechanism having a complicated movable part.

It is a top view which shows the corner part of the container made from a foamed resin of this invention. The side cross section of AA of a corner part is shown. (A) shows the side cross section of BB of a corner part.

(B) is a back view of the site | part corresponding to Fig.3 (a).
It is sectional drawing of the metal mold | die which shape | molds the container of this invention. It is sectional drawing of the metal mold | die which shows the other embodiment which shape | molds the container of this invention. It is sectional drawing which shows the state which accumulated the container of this invention. It is a figure which shows the other embodiment of the metal mold | die of this invention, Comprising: The case where the cross-sectional shape of a columnar piece resembles an ellipse is represented. (A) is a top view of a corner part. (B) shows the sectional side view of a corner part. (C) is a back view of a corner portion. The fragmentary sectional view which expanded the lower end 53 of the columnar piece 50 and the upper part of the columnar lower piece 51 is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Foamed resin container 2 Corner | angular part 3 Container side wall 4 Upper end surface 5 Lower end surface 6 Drainage well 7 Sealing part 8 Upper surface 9 Terminal 10 Water seal weir 31 Water reservoir part 32 Water introduction hole 40 Core die 41 Cavity die 42 Molding space 50 Column-shaped piece 51 Column-shaped lower piece 58 Water reservoir forming convex portion 60 Tongue piece-shaped piece 71 Notch for forming water seal weir

Claims (9)

  A sealing portion is provided for sealing a part of the lower portion of the drainage dredging hole penetrating from the upper end surface of the container side wall to the lower end surface, and a water seal weir protruding upward from the drainage dredging hole is provided at the upper end of the sealing portion. And the upper surface of the sealing part is structured to communicate with the water reservoir in the container through a water guide hole provided below the side wall of the container, and the water seal weir, the upper surface of the sealing part, and the water guide hole A foamed synthetic resin drainage container characterized in that it functions as a water-sealed portion comprising:   The foamed synthetic resin drainage container according to claim 1, wherein the water guide hole is formed in parallel with the upper surface of the sealing portion.   The foamed synthetic resin drainage container according to claim 1 or 2, wherein the water level of the water reservoir is formed lower than the bottom surface of the container.   The foamed synthetic resin drainage container according to any one of claims 1 to 3, wherein the container is closed with a lid provided with a through hole at a position coinciding with the drainage hole penetrating the container side wall.   Between the core mold for container molding and the cavity mold, a columnar piece and a columnar lower piece for forming a drainage hole penetrating from the upper end surface to the lower end surface of the container side wall are loaded, and the columnar piece is a drainage hole. The bottom part of the columnar piece is provided with a notch for forming a water seal dam, and is formed from a water reservoir forming convex part of the core mold. An apparatus for producing a foamed synthetic resin drainage container, wherein a flexible tongue-shaped piece having a length reaching a columnar piece is fixed to the water reservoir forming convex portion.   6. The manufacturing apparatus according to claim 5, wherein the bendable tongue-shaped piece is a heat-resistant synthetic resin.   The manufacturing apparatus according to claim 6, wherein the heat-resistant synthetic resin is silicon rubber.   The manufacturing apparatus according to claim 5, wherein the bendable tongue-shaped piece is plate-shaped or columnar. A drain hole pit-forming columnar piece having a notch for forming a water seal dam at the lower end and a columnar lower piece are loaded so as to be positioned between a core mold for container molding and a cavity mold, and the core mold Has a structure in which a flexible tongue-shaped piece having a length extending from a water reservoir forming convex portion to a drain hole pit forming columnar piece is fixed to the water reservoir forming convex portion, and this core mold and cavity mold The foam space is filled with foamable resin particles and heated and melted, and then foam-molded. Then, when the mold is opened, deformation of the flexible tongue-shaped piece causes deformation of the upper surface of the sealing portion and the inside of the container. A method for producing a foamed synthetic resin drainage container, wherein a tongue-shaped piece is separated from a water guide hole communicating with a water reservoir.

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