JP2020055631A - Injection molding container, container with lid, and manufacturing method of injection molding container - Google Patents

Abstract

To provide an injection molding container which has a gas barrier and enables re-closing, and to provide a container with a lid and a manufacturing method of the injection molding container.SOLUTION: An injection molding container 10 includes: a sheet molded body 3 having an outer surface 3d and an inner surface 3e and having a gas barrier; and an injection resin part 8 formed on the outer surface 3d of the sheet molded body 3 and having a body part 11, a bottom part 12 provided below the body part 11, a flange part 13 provided on the body part 11, and a cylindrical part 14 provided on the flange part 13. The cylindrical part 14 is provided with a second fitting part 15 which fits in a first fitting part of a lid.SELECTED DRAWING: Figure 2A

Description

  The present disclosure relates to an injection molded container, a container with a lid, and a method for manufacturing an injection molded container.

  BACKGROUND ART Conventionally, glass bottles having high transparency and gas barrier properties have been often used as containers for storing food products such as medicines, cosmetics, and jam products. For example, in Patent Literature 1, a shape having a mouth, a shoulder continuing downward from the mouth, a straight trunk continuing downward from the shoulder, and a hem continuing downward from the straight trunk, A so-called wide-mouthed glass bottle is disclosed.

  On the other hand, such a glass bottle has a problem that it is heavy and fragile and a problem that it is troublesome to dispose, and there is a need for a plastic container that is lightweight, hard to break and easy to dispose.

  As such a plastic container, a container formed by injection molding is known (for example, Patent Document 2). The container disclosed in Patent Literature 2 has a body, a flange provided at an upper end of the body, and a bottom provided at a lower end of the body. In addition, a lid material is sealed from the top to seal the contents in the flange part, in the case of beverages, insert a straw into the lid material and drink it, and in the case of sweets and snacks, open the easy peel lid material It is common to eat. In addition, the overcap may be fitted on the upper portion of the flange as dust from the outside.

JP 2008-195446 A JP 2014-094776 A

  However, plastic containers generally have insufficient gas barrier properties compared to glass bottles. Therefore, there is a need for a method of extending the expiration date of the contents by enhancing the gas barrier properties.

  In the container disclosed in Patent Literature 2, when the contents are left behind, for example, when moving by car or train or when carrying the container in a bag, in the case of a beverage, the contents are inserted through a straw insertion slot. In the case of leaks or confectionery or snacks, there is a problem in usability and storability such that the lid comes off and the contents are scattered.

  The present disclosure has been made in view of such a point, and it is an object of the present disclosure to provide a method of manufacturing an injection-molded container, a container with a lid, and an injection-molded container that has gas barrier properties and can be reclosed. I do.

  An injection molded container according to one embodiment includes a lid having a top surface portion, a side surface portion provided on a lower peripheral edge of the top surface portion, and a first fitting portion provided on an inner peripheral surface of the side surface portion. A cup-shaped injection-molded container to be mounted, having an outer surface and an inner surface, a sheet molded body having gas barrier properties, and a body formed on the outer surface of the sheet molded body, a trunk, and a portion below the trunk. And an injection resin portion having a flange portion provided above the body portion and a tubular portion provided above the flange portion, wherein the tubular portion has An injection-molded container provided with a second fitting portion fitted to the first fitting portion of the lid.

  In the injection molded container according to one embodiment, the second fitting portion may have a screw structure or a plugging structure that fits with the first fitting portion of the lid.

  In the injection molded container according to one embodiment, a first stack rib for the injection molded container, which protrudes radially inward, may be provided on an inner surface of the sheet molded body.

  In the injection-molded container according to one embodiment, a plurality of the first stack ribs may be provided along a circumferential direction.

  In one embodiment, the sheet molded body has a second stack rib for the sheet molded body formed so as to protrude from the outer surface side toward the inner surface side; The resin portion may be solidified in a state where the first stack rib is pressed toward the inner surface side.

  In the injection molded container according to one embodiment, a plurality of the second stack ribs may be formed along a circumferential direction.

  In the injection molded container according to one embodiment, a label may be provided outside the injection resin portion.

  In the injection-molded container according to one embodiment, a circumferential groove may be formed at an end on the flange portion side of an outer peripheral surface of the cylindrical portion.

  In the injection molded container according to one embodiment, a plurality of reinforcing ribs extending in a vertical direction may be provided in the circumferential groove formed on the outer peripheral surface of the cylindrical portion.

  A container with a lid according to one embodiment includes an injection-molded container according to the present disclosure and the lid.

  The method for manufacturing an injection-molded container according to one embodiment includes an outer surface, an inner surface, a sheet molded body having gas barrier properties, and a body formed on the outer surface of the sheet molded body, a trunk, An injection molding container having a bottom provided below, an injection resin part having a flange provided above the body, and a tubular part provided above the flange is provided with a cavity. In a method of manufacturing an injection molded container manufactured using a mold assembly including a side mold and a core, a step of mounting the sheet molded body on the core, and mounting the core in the cavity side mold. Mounting a slide mold slidable laterally on the upper part of the cavity side mold, and placing the sheet molded body in a space between the cavity side mold, the core, and the slide mold. For the core Injecting an injection resin so as to press, forming the body between the cavity-side mold and the core, and forming the flange between the cavity-side mold and the slide mold. And a method for manufacturing an injection-molded container, wherein the cylindrical portion is formed between the core and the slide mold.

  The method of manufacturing an injection-molded container according to one embodiment, further comprising a step of attaching a label to the cavity-side mold, wherein in the step of injecting the injection resin, the cavity-side mold, the core, and the slide The injection resin may be injected into a space between the mold and the mold so that the sheet molded body is pressed against the core and the label is pressed against the cavity-side mold.

  According to the present disclosure, it is possible to provide a method of manufacturing an injection-molded container, a container with a lid, and an injection-molded container that has gas barrier properties and can be reclosed.

FIG. 1 is an exploded front view showing a container with a lid according to the first embodiment. FIG. 2A is a vertical sectional view showing the injection molded container according to the first embodiment. FIG. 2B is a plan view showing the injection-molded container according to the first embodiment. FIG. 3 is an enlarged view showing the injection molded container according to the first embodiment (an enlarged view corresponding to a portion III in FIG. 2A). FIG. 4 is a vertical sectional view showing a sheet molded body of the injection molded container according to the first embodiment. FIG. 5 is a plan view showing a sheet molded body of the injection molded container according to the first embodiment. FIG. 6A is a side sectional view showing an example of a laminated structure of a sheet molded body of the injection molded container according to the first embodiment. FIG. 6B is a side sectional view showing another example of the laminated structure of the sheet molded body of the injection molded container according to the first embodiment. FIG. 7 is a developed view showing a label of the injection molded container according to the first embodiment. FIG. 8 is a side sectional view showing an example of a laminated structure of the label of the injection molded container according to the first embodiment. FIG. 9 is a diagram illustrating a method of manufacturing the injection molded container according to the first embodiment. FIG. 10 is a diagram illustrating a method of manufacturing the injection molded container according to the first embodiment. FIG. 11 is a diagram illustrating a method of manufacturing the injection molded container according to the first embodiment. FIG. 12A is a view (an enlarged view corresponding to the XII part of FIG. 11) illustrating the method of manufacturing the injection molded container according to the first embodiment. FIG. 12B is a view (an enlarged view corresponding to the XII part of FIG. 11) illustrating the method of manufacturing the injection-molded container according to the first embodiment. FIG. 13A is a diagram illustrating the method for manufacturing the injection molded container according to the first embodiment. FIG. 13B is a diagram illustrating the method for manufacturing the injection-molded container according to the first embodiment. FIG. 13C is a diagram illustrating the method for manufacturing the injection-molded container according to the first embodiment. FIG. 13D is a diagram illustrating a method of storing the injection-molded container according to the first embodiment. FIG. 14 is a vertical sectional view showing a modification of the container with a lid according to the first embodiment, and is an enlarged view showing a first fitting portion and a second fitting portion. FIG. 15 is a vertical sectional view showing a sheet molded body of an injection molded container according to the second embodiment. FIG. 16 is a plan view showing a sheet molded body of an injection molded container according to the second embodiment. FIG. 17 is a vertical sectional view showing an injection-molded container according to the second embodiment. FIG. 18 is an enlarged view (an enlarged view corresponding to a portion XVIII in FIG. 17) showing an injection molded container according to the second embodiment. FIG. 19 is a diagram illustrating a method of manufacturing the injection molded container according to the second embodiment. FIG. 20 is a diagram illustrating a method of manufacturing the injection molded container according to the second embodiment. FIG. 21 is a diagram (an enlarged view corresponding to the XXI part in FIG. 20) illustrating the method for manufacturing the injection molded container according to the second embodiment. FIG. 22 is a diagram illustrating a method of storing an injection-molded container according to the second embodiment.

(First Embodiment)
Hereinafter, a first embodiment will be described with reference to the drawings. In the drawings attached to the present specification, the scale, the vertical and horizontal dimensional ratios, and the like are appropriately changed from those of the actual product and exaggerated for convenience of illustration and understanding. In the present embodiment, “upper”, “upper end”, “lower”, and “lower end” mean that the bottom 12 of the injection-molded container 10 of the lid-mounted container 10A faces downward as shown in FIG. It means "upper", "upper", "lower", and "lower" when 10A is placed.

  First, a container 10A with a lid according to the present disclosure will be described with reference to FIG.

  The container 10A with a lid according to the present disclosure includes a cup-shaped injection molded container 10 obtained by injecting an injection resin onto an outer surface of a sheet molded body 3 described later, and a lid 20 attached to the injection molded container 10. It has.

  The lid 20 includes a top surface portion 21, a side surface portion 22 provided on a lower peripheral edge of the top surface portion 21, and an internal screw (first fitting portion) 25 provided on an inner peripheral surface of the side surface portion 22. Have.

  As shown in FIG. 2A, the injection-molded container 10 includes a sheet molded body 3 and an injection resin portion 8 formed on an outer surface of the sheet molded body 3. The injection-molded container 10 further includes a label 4 located on the outermost side of the injection-molded container 10, and the above-described injection resin portion 8 is interposed between the sheet molded body 3 and the label 4.

  Among these, the sheet molded body 3 has an outer surface 3d and an inner surface 3e, and an injection resin portion 8 is formed on the outer surface 3d of the sheet molded body 3. Further, the sheet molded body 3 includes a body sheet 3a provided at a position corresponding to a body 11 described below and a tubular portion 14 described later, and a bottom sheet 3b provided at a position corresponding to a bottom 12 described later. (See FIG. 2A). A flange sheet 3c is provided at the upper end of the trunk sheet 3a. Such a sheet molding 3 has gas barrier properties as a whole.

  A first stack rib 35 for the injection-molded container 10 is provided on the inner surface 3e of the sheet molded body 3 and protrudes radially inward. A plurality of the first stack ribs 35 are provided along the circumferential direction. In this case, as shown in FIG. 2B, six first stack ribs 35 that are separated from each other along the circumferential direction are provided. Thus, by providing the first stack ribs 35 spaced apart from each other along the circumferential direction, the amount of resin used when forming the first stack ribs 35 can be reduced. In this case, it is preferable that the first stack ribs 35 are arranged at equal intervals along the circumferential direction. Thereby, when a plurality of injection molding containers 10 are stacked, it is possible to prevent one injection molding container 10 from being inclined with respect to another injection molding container 10, and the injection molding containers 10 Sticking can be made difficult. The portion of the inner surface 3e of the body sheet 3a of the sheet molded body 3 located below the first stack rib 35 extends in a cylindrical shape having a substantially uniform diameter.

  Next, the configuration of the sheet molded body 3 before the injection resin portion 8 is formed will be further described with reference to FIGS.

  As shown in FIG. 4, the sheet molded body 3 before the injection resin portion 8 is formed has an outer surface 3d and an inner surface 3e. Further, the sheet molded body 3 has a body sheet 3a, a bottom sheet 3b, and a flange sheet 3c. The body sheet 3a, the bottom sheet 3b, and the flange sheet 3c are integrally formed from one sheet by a sheet forming method.

  Among them, the bottom sheet 3b has a substantially circular shape in plan view as shown in FIG.

  The body sheet 3a is connected to the bottom sheet 3b and extends upward from the bottom sheet 3b in a cylindrical shape. Further, in the body sheet 3a, a portion located above a first stack rib 35, which will be described later, has a gradually increasing opening area from the lower side (the bottom sheet 3b side) to the upper side (the flange section sheet 3c side). It has the shape which becomes. Further, a portion of the trunk sheet 3a located below the first stack rib 35 extends in a cylindrical shape having a substantially uniform diameter.

  The flange sheet 3c is connected to the upper end of the trunk sheet 3a, and is formed over the entire periphery of the upper end of the trunk sheet 3a. As shown in FIG. 5, the flange portion sheet 3c has an annular shape in plan view, and horizontally protrudes laterally from the upper end of the trunk portion sheet 3a.

  A first stack rib 35 for the injection-molded container 10 is provided on the inner surface 3e of the sheet molded body 3 and protrudes radially inward. As described above, this first stack rib 35 prevents the injection molded containers 10 from sticking to each other when the plurality of injection molded containers 10 are stacked, so that it becomes difficult to separate the injection molded containers 10 individually. Play a role. In this case, a plurality of first stack ribs 35 are provided along the circumferential direction. In this case, as shown in FIG. 5, six first stack ribs 35 that are separated from each other along the circumferential direction are provided.

  Further, on the upper part of the trunk sheet 3a, a second stack rib 36 for the sheet molded body 3 (an imaginary line (two points) in FIG. Dashed line) and FIG. 4). The second stack rib 36 is used when a plurality of sheet moldings 3 are stacked in a process of manufacturing the injection molded container 10. Then, the second stack rib 36 is crushed by the injection pressure of the injection resin constituting the injection resin portion 8 in an injection mold 50 described later (see FIGS. 2A and 3). For this reason, in the injection molded container 10, the second stack rib 36 of the sheet molded body 3 is crushed, and the inner surface 3e of the body sheet 3a of the sheet molded body 3 in the injection molded container 10 is substantially straight in a sectional view. Extends on the line. In this case, the injection resin of the injection resin portion 8 is solidified in a portion corresponding to the second stack rib 36 while pressing the second stack rib 36 from the outer surface 3d side toward the inner surface 3e side. In the present embodiment, the second stack ribs 36 are provided on the upper part of the trunk sheet 3a, but the position of the second stack ribs 36 is not limited to the upper part of the trunk sheet 3a, and may be appropriately designed. Preferably, it is preferable to provide it in a range between the flange portion sheet 3c and about half the position of the trunk portion sheet 3a.

  Further, the second stack rib 36 is formed over the entire circumference of the inner surface 3 e of the sheet molded body 3. Thus, when a plurality of single sheet molded bodies 3 are stacked, it is possible to make it difficult for the sheet molded bodies 3 to adhere to each other over the entire circumferential direction of the sheet molded bodies 3.

  As shown in FIGS. 3 and 4, an upper inclined portion 3h is formed above the second stack rib 36 of the trunk sheet 3a so as to project from the inner surface 3e toward the outer surface 3d. The upper inclined portion 3h is formed over the entire periphery of the sheet molded body 3. The upper inclined portion 3h is inclined so as to go from the outside to the inside as going upward from below.

  Incidentally, the sheet molded body 3 includes the body sheet 3a having the flange sheet 3c and the bottom sheet 3b as described above, and has a container shape. In this case, the sheet molded body 3 is composed of a sheet-like laminate 23 having a layer configuration as shown in FIGS. 6A and 6B.

  That is, as shown in FIG. 6A, a laminate 23 forming the sheet molded body 3 includes a polypropylene layer (PP) 23a as a synthetic resin layer sequentially arranged from the outside and an ethylene vinyl as a gas barrier layer having a gas barrier property. It includes an alcohol copolymer layer (EVOH) 23b and a polypropylene layer (PP) 23c as an adhesive layer. As shown in FIG. 6B, the laminate 23 forming the sheet molded body 3 is composed of a polypropylene layer (PP) 23a as a synthetic resin layer, an oxygen-absorbing resin layer 231b, and a barrier layer 232b which are sequentially arranged from the outside. And an oxygen absorbing resin layer 233b and a polypropylene layer (PP) 23c as an adhesive layer.

  Then, by performing vacuum forming on the sheet-like laminated body 23 configured as described above, the sheet molded body 3 having a container shape can be obtained.

  Next, the injection resin portion 8 will be described. As shown in FIGS. 1 to 3, the injection resin portion 8 is obtained by injecting the injection resin onto the outer surface 3 d of the sheet molding 3. The injection-molded container 10 includes a body 11, a bottom 12 provided below the body 11, a flange 13 provided above the body 11, and a cylindrical member provided above the flange 13. A part 14.

  Of these, the trunk 11 has a cylindrical shape whose diameter gradually decreases from above (toward the cylindrical portion 14) to downward (toward the bottom 12). However, the present invention is not limited to this, and the body 11 may have a polygonal cylindrical shape such as a rectangular cylindrical shape or an octagonal cylindrical shape. In addition, a projection 11a that projects radially inward is formed below the body 11. The projection 11a plays a role of supporting the first stack rib 35 of the sheet molding 3 described above.

  The bottom 12 has a substantially circular shape in plan view. Further, on the periphery of the bottom portion 12, a leg portion 12a projecting downward from the bottom portion 12 is provided.

  The flange portion 13 has a substantially annular shape in plan view, and protrudes horizontally from the upper end of the body portion 11 to the side. The flange portion 13 is formed over the entire upper end of the body portion 11.

  The cylindrical portion 14 extends upward from the inner end of the flange portion 13 and has a cylindrical shape. An outer screw (second fitting portion) 15 that fits into an inner screw (first fitting portion) 25 of the lid 20 is provided on the outer peripheral surface of the cylindrical portion 14. An annular rib 14a having an annular shape in a plan view is provided at an upper end of the cylindrical portion 14. The annular rib 14a protrudes horizontally from the upper end of the tubular portion 14 to the side.

  A circumferential groove 16 is formed on the outer peripheral surface of the cylindrical portion 14. The circumferential groove 16 is formed at the lower end (the end on the flange portion 13 side) of the outer peripheral surface of the cylindrical portion 14. The circumferential groove 16 of the cylindrical portion 14 is formed by an inner protrusion 55 provided circumferentially on an inner peripheral surface of a slide mold 53 described later.

  Further, since the circumferential groove 16 is formed at the end of the outer peripheral surface of the cylindrical portion 14 on the side of the flange 13, the end of the cylindrical portion 14 on the side of the flange 13 is thin (for example, 1.5 mm thick). ) And the vertical buckling strength is reduced. Therefore, a plurality of reinforcing ribs 17 (thickness: 1.0 mm) are provided in the circumferential groove 16 to increase the buckling strength in the vertical direction. The reinforcing ribs 17 are arranged at equal intervals along the circumferential direction of the circumferential groove 16. In this case, as shown in FIG. 2B, 16 reinforcing ribs 17 are provided.

  A synthetic resin such as polyethylene, polyethylene terephthalate, polystyrene, or polypropylene can be used as a material of the injection resin forming the injection resin portion 8.

  Next, the label 4 will be described below. As shown in FIG. 7, the label 4 has a fan shape, and corners below both ends 4a and 4b of the label 4 are cut off.

  As shown in FIG. 2A, the length of the label 4 in the height direction preferably slightly protrudes from the flange portion 13 above the body portion 11 and reaches about the middle portion of the leg portion 12a below the body portion 11. The length of the label 4 in the circumferential direction is such that when the both ends 4a, 4b are mounted on the cavity-side mold 52, which will be described later, while the two ends 4a, 4b abut each other, the width of the label 4 is 0. The length is preferably such that a gap of about 6 to 1.5 mm is generated. By forming such a label 4, the label 4 is inserted into a predetermined position of the cavity-side mold 52 of the injection mold 50, fixed by vacuum suction, and the cavity-side mold 52, the core 51, and the slide mold 53. When the injection resin is injected from the gate at the center of the bottom of the cavity-side mold 52 after the mold is closed, the injection resin can be smoothly removed without causing a defect such as overlapping portion, turning over, and wrinkling on the label 4. The injected label 4 and the injection resin can be integrally molded.

  Such a label 4 can be formed of a transparent laminated sheet, aluminum foil, or aluminum-evaporated PET, but more preferably has gas barrier properties. In addition, a printed layer of a picture, a character, or the like can be partially provided to enhance the design. As a representative configuration example of the laminated sheet (laminated body 24) used for the label 4, the following configuration is exemplified.

  That is, as shown in FIG. 8, the label 4 includes (i) an adhesive layer 24a with an injection resin, (ii) a synthetic resin layer 24b, (iii) a gas barrier layer 24c, and (iv) a printing base material layer 24d. (Where the layer (i) and the layer (ii) can be used together). Each of these layers 24a, 24b, 24c, 24d is independently formed into a film and bonded (dry lamination) via an adhesive, or a part or all of the layers are melt-extruded (EC, co-extrusion). Can also be formed. Further, the printing base material layer can be omitted according to the use and purpose.

  The adhesive layer 24a is not particularly limited as long as it adheres to the injection resin. Usually, the adhesive layer 24a has an adhesive property such as plastic of the same material as the injection resin or polyethylene containing EVA (ethylene / vinyl acetate copolymer). Resins having these or coextruded or coated plastic films thereof can be suitably used.

  The film as the printing base material layer 24d is not particularly limited as long as it is generally printable, and for example, a polyester film, a polypropylene film, a nylon film, or the like can be appropriately used.

  As the gas barrier layer 24c, for example, (a) an aluminum foil (7 to 25 μm), (b) a metal or metal oxide laminated on a plastic film by vapor deposition or the like, for example, a silicon oxide vapor-deposited plastic film, aluminum oxide vapor-deposited Plastic film, aluminum-deposited plastic film, (c) other, polyacrylonitrile resin, EVOH (ethylene vinyl alcohol copolymer), PVDC (polyvinylidene chloride) film, PVDC-coated biaxially stretched plastic film, and the like. It can be appropriately selected according to the performance. When the sheet molded body 3 has a sufficient gas barrier property, the label 4 does not necessarily need to have the gas barrier layer 24c.

  Further, polypropylene (PP) can be used for the synthetic resin layer 24b.

  Each of the above layers is formed by a dry lamination method, an extrusion lamination method, an extrusion coating method, or another coating method according to a conventional method.

  Specifically, as the label 4, for example, a label having the following layer configuration can be used.

(1) Heat seal stretched polypropylene layer (HSOPP) 30 μm / aluminum foil 7 μm / stretched polypropylene layer (OPP) 30 μm
(2) Heat seal stretched polypropylene layer (HSOPP) 30 μm / VM-PET12 / stretched polypropylene layer (OPP) 30 μm
(3) Heat sealant coating / stretched polypropylene layer (OPP) 30 μm / aluminum foil 7 μm / stretched polypropylene layer (OPP) 30 μm
In addition, as the injection resin used for the injection-molded container 10 according to the present embodiment, an injection-moldable thermoplastic resin, for example, polypropylene, polyethylene, polystyrene, or the like can be used.

  Next, a method for manufacturing the injection molded container 10 will be described with reference to FIGS. 9 to 13C.

  First, the sheet-shaped laminated body 23 is subjected to vacuum forming or air-pressure forming to obtain a sheet-shaped body 3 having a container shape having a trunk sheet 3a, a bottom sheet 3b, and a flange sheet 3c. Next, the formed sheet molded bodies 3 are stacked in a state where a plurality of the sheet molded bodies 3 are stacked (see the lower part of FIG. 9).

  Next, the sheet moldings 3 are separated and lifted one by one from the stacked sheet moldings 3 (see the middle part of FIG. 9). In this case, since the sheet molded body 3 has the second stack ribs 36 protruding from the outer surface 3d side toward the inner surface 3e side, the stacked sheet molded bodies 3 do not adhere to each other, and the sheet molded body 3 does not stick. 3 can be lifted one by one without fail.

  Next, the injection molding die 50 is prepared, and the sheet molded body 3 is attached to the core 51 (the lower core 51a) of the injection molding die 50 by suction (see the upper part of FIG. 9). At this time, a gap S1 is formed between the portion corresponding to the second stack rib 36 of the sheet molded body 3 and the lower core 51a.

  A label 4 is prepared in parallel with the production of the sheet molding 3. At this time, first, the laminate 24 is prepared. Next, the label 4 is obtained by punching out the laminated body 24 with a laser or the like.

  Next, as shown in FIG. 10, the label 4 is mounted on the inner peripheral surface of the cavity-side mold 52 of the injection molding die 50, and the label 4 is fixed on the inner peripheral surface of the cavity-side mold 52 by vacuum suction. .

  Next, as shown in FIG. 11, the lower core 51a of the core 51 is mounted in the cavity-side mold 52, and a slide mold 53 that is slidable in the lateral direction is mounted on the cavity-side mold 52. The core 51 (the lower core 51a and the upper core 51b), the slide mold 53, and the stripper plate 54 are clamped to the mold 52.

  At this time, as shown in FIG. 12A, an inner protrusion 55 is provided on the slide mold 53. Thereby, when the injection molding die 50 is clamped, the inner protrusion 55 of the slide die 53 comes into contact with the upper inclined portion 3h of the sheet molding 3, and the upper inclined portion 3h is moved from the outer surface 3d side to the inner surface 3e side. (See arrow a1 in FIG. 12A). Therefore, a part of the second stack rib 36 of the sheet molded body 3 is crushed by the inner protrusion 55 in the injection-molded mold 50 that has been clamped.

  Next, an injection resin is injected from a gate 52 a provided at the center of the bottom of the cavity-side mold 52. In this case, the sheet molding 3 is pressed against the lower core 51a into the space between the cavity side mold 52, the core 51, the slide mold 53, and the stripper plate 54, and the label 4 is placed on the cavity side. The injection resin is injected so as to be pressed against the mold 52. At this time, the injection resin injected from the gate 52a enters between the sheet molding 3 and the label 4, and the injection molding adheres the sheet molding 3 and the label 4, and the injection resin portion 8 It is formed. At this time, the body 11 is formed between the cavity mold 52 and the lower core 51a, and the flange 13 is formed between the cavity mold 52 and the slide mold 53. The cylindrical part 14 is formed between the slide mold 53 and the slide mold 53. Thus, the injection molded container 10 is obtained.

  At this time, the injection resin moves from below to above in the space between the cavity-side mold 52, the core 51, the slide mold 53, and the stripper plate 54. At this time, as shown in FIG. 12B, the label 4 is also pushed upward by the injection resin (see the arrow a2 in FIG. 12B). On the other hand, the label 4 abuts on the inner protrusion 55 of the slide mold 53 and does not move upward any further.

  As described above, by providing the inner protrusion 55 on the slide mold 53, the label 4 previously provided on the inner peripheral surface of the cavity-side mold 52 can be replaced with a flange at the time of injection molding using the injection mold 50. It does not move above the part where the part 13 is formed. In other words, the injected resin rises in the space inside the injection mold 50 and pushes up the label 4 so as to be shifted upward. However, since the inner protrusion 55 is provided on the slide mold 53, the label 4 abuts on the inner protrusion 55, and the upward movement of the label 4 is restricted. Therefore, the body 11 of the injection-molded container 10 can be reliably covered with the label 4 from the bottom 12 to the flange 13, and the gas barrier characteristics of the injection-molded container 10 can be reliably maintained. Further, in the injection-molded container 10, the arrangement position of the label 4 can be always stabilized.

  For this reason, in the injection-molded container 10, the arrangement position of the label 4 can be stabilized, and the arrangement position of the injection-molded container 10 can be stabilized. The gas barrier characteristics of the injection-molded container 10 can be reliably maintained by reliably covering the portion 13.

  The label 4 pushed upward by the injection resin is bent in the injection mold 50 so that the upper end of the label 4 expands outward, and the portion of the label 4 that is bent outward is the injection resin portion 8. And the flange portion 13 of FIG.

  During this time, the molten injection resin in the injection molding die 50 reaches the second stack rib 36 of the sheet molded body 3. At this time, as shown in FIG. 12B, the injection resin presses the second stack rib 36 from the outer surface 3d side to the inner surface 3e side by the injection pressure, and solidifies in this state. At this time, the second stack rib 36 is pressed toward the gap S1 described above (see the arrow a3 in FIG. 12B). For this reason, the second stack rib 36 (see the phantom line in FIG. 12B) before the injection of the injection resin is crushed, and the inner surface 3e of the trunk sheet 3a after the injection of the injection resin extends substantially in a straight line in a sectional view. (See the solid line in FIG. 12B). In this way, the injection resin is solidified while pressing the second stack rib 36 toward the inner surface 3e. Accordingly, it is possible to prevent the contents from remaining on the second stack rib 36 in the injection molded container 10.

  Next, as shown in FIG. 13A, the core 51, the slide mold 53, and the stripper plate 54 are pulled upward together with the injection molding container 10 from the cavity mold 52. At this time, the injection molded container 10 is held around the lower core 51a of the core 51.

  Next, as shown in FIG. 13B, the slide mold 53 of the injection mold 50 slides laterally with respect to the core 51 and the stripper plate 54, and the slide mold 53 is separated from the core 51 and the stripper plate 54.

  Thereafter, as shown in FIG. 13C, the stripper plate 54 moves downward from the upper core 51b of the core 51 toward the injection molding container 10. At this time, the injection molded container 10 held on the outer periphery of the lower core 51a of the core 51 can be pressed downward to be taken out.

  Next, the molded injection-molded containers 10 are stored in a stacked state (see the lower part of FIG. 13D). Meanwhile, in the injection-molded container 10, a first stack rib 35 for the injection-molded container 10 is provided on the inner surface 3e of the sheet molded body 3 and protrudes radially inward. Accordingly, when a plurality of molded injection-molded containers 10 are stacked, the leg portion 12a of one injection-molded container 10 becomes the first portion of the other injection-molded container 10 located below the one injection-molded container 10. It contacts the stack rib 35. Then, the stacked injection-molded containers 10 are stored without being fixed.

  Next, the injection molded container 10 is filled with contents such as food. At this time, the injection molded containers 10 are separated and lifted one by one from the stacked injection molded containers 10 (see the upper part of FIG. 13D). In this case, since the first stack rib 35 for the injection-molded container 10 is provided in the injection-molded container 10, the stacked injection-molded containers 10 do not adhere to each other. Can be lifted one by one.

  The injection-molded container 10 is filled with contents such as food, and the lid 20 (see FIG. 1) is attached to the flange portion 13 to seal the injection-molded container 10.

  As described above, according to the present embodiment, the injection molded container 10 includes the sheet molded body 3 having gas barrier properties and the injection resin portion 8. Thereby, the injection molded container 10 can have gas barrier properties. Further, the cylindrical portion 14 is provided with a second fitting portion that fits into the first fitting portion of the lid 20. This enables reclosing in the lidded container 10A.

  In this case, when using the container 10A with a lid, the contents are taken out from the injection molded container 10 and used. When all the contents are not taken out, the contents are left in the injection molded container 10 and the side surface 22 of the lid 20 is fitted into the cylindrical portion 14. Thereafter, by tightening the lid 20 with respect to the injection-molded container 10, the outer screw 15 and the inner screw 25 are engaged, and the injection-molded container 10 can be easily and easily resealed (reclosed).

  Further, according to the present embodiment, the first stack rib 35 for the injection molded container 10 that protrudes radially inward is provided on the inner surface 3 e of the sheet molded body 3. Thereby, when the plurality of injection molded containers 10 are stacked, it is possible to suppress the injection molded containers 10 from sticking to each other. Therefore, when the injection molded containers 10 are separated individually, they can be easily separated.

  Further, according to the present embodiment, the sheet molded body 3 has the second stack ribs 36 for the sheet molded body 3 formed so as to protrude from the outer surface 3d side toward the inner surface 3e side. . Further, the injection resin portion 8 is solidified in a state where the second stack rib 36 is pressed toward the inner surface 3e. This makes it possible to smoothly lift the sheet molded bodies 3 one by one from the stacked sheet molded bodies 3, while, in the completed injection molded container 10, the contents are placed on the second stack ribs 36. Can be prevented from remaining.

  According to the present embodiment, since the label 4 is provided outside the injection resin portion 8, the design of the injection molded container 10 can be improved.

  Further, according to the present embodiment, a circumferential groove 16 is formed at an end portion of the outer peripheral surface of the cylindrical portion 14 on the flange portion 13 side. The circumferential groove 16 of the cylindrical portion 14 is formed by an inner projection 55 provided on the inner peripheral surface of the slide mold 53 in a circular shape. Thus, during the injection molding using the injection mold 50, the label 4 abuts on the inner protrusion 55, and the upward movement of the label 4 is restricted. Therefore, the body 11 of the injection-molded container 10 can be reliably covered with the label 4 from the bottom 12 to the flange 13, and the gas barrier characteristics of the injection-molded container 10 can be reliably maintained. Further, in the injection-molded container 10, the arrangement position of the label 4 can be always stabilized. For this reason, in the injection-molded container 10, the arrangement position of the label 4 can be stabilized, and the arrangement position of the injection-molded container 10 can be stabilized. The gas barrier characteristics of the injection-molded container 10 can be reliably maintained by reliably covering the portion 13.

  Further, according to the present embodiment, a plurality of reinforcing ribs 17 extending in the vertical direction are provided in the circumferential groove 16 formed on the outer peripheral surface of the cylindrical portion 14. Thereby, the buckling strength of the injection molded container 10 in the vertical direction can be increased.

  In the above-described embodiment, the inner screw 25 is provided as a first fitting portion on the side surface portion 22 of the lid 20, and the outer screw 15 is provided as a second fitting portion on the cylindrical portion 14 of the injection molded container 10. Although the example in which it was provided was shown, it is not limited to this. For example, as shown in FIG. 14, a first circumferential projection 27 is provided as a first fitting portion on the side surface portion 22 of the lid 20, and a second circumferential projection 18 is provided as a second fitting portion on the tubular portion 14. The injection-molded container 10 may be sealed with the lid 20 by a plugging method in which the side portion 22 of the lid 20 is pressed from above and fitted into the cylindrical portion 14 of the injection-molded container 10. In this case, the stopper structure is formed by the second circumferential protrusion 18 of the cylindrical portion 14 and the first circumferential protrusion 27 of the side surface portion 22.

  Further, in the above embodiment, the example in which the injection molded container 10 has the label 4 provided on the outer side in the thickness direction of the injection resin portion 8 has been described. However, the present invention is not limited thereto, and the injection molded container 10 includes the label 4. Instead, it may be constituted by the sheet molded body 3 and the injection resin portion 8. In this case, in the step of injecting the injection resin portion 8, the injection resin portion 8 is injected onto the outer surface of the sheet molding 3.

  Further, in the above-described embodiment, an example in which the plurality of first stack ribs 35 are provided along the circumferential direction has been described, but the present invention is not limited to this. For example, although not shown, the first stack rib 35 may be formed over the entire circumference of the inner surface 3e of the sheet molded body 3. Thereby, when a plurality of injection-molded containers 10 are stacked, it is possible to make it difficult for the injection-molded containers 10 to adhere to each other over the entire circumferential direction of the injection-molded containers 10.

  Further, in the above-described embodiment, an example is shown in which the second stack rib 36 is formed over the entire circumference of the inner surface 3e of the sheet molded body 3, but is not limited thereto. For example, although not shown, a plurality of second stack ribs 36 may be provided along the circumferential direction. Thereby, the amount of resin used when forming the second stack ribs 36 can be reduced. In this case, it is preferable that the second stack ribs 36 are arranged at equal intervals along the circumferential direction. Thereby, when a plurality of sheet moldings 3 are stacked, it is possible to suppress the inclination of one sheet molding 3 with respect to the other sheet moldings 3, and the sheet moldings 3 are Sticking can be made difficult.

(Second embodiment)
Next, a second embodiment will be described with reference to FIGS. In the second embodiment shown in FIGS. 15 to 22, the first stack rib 35 is not provided on the inner surface 3 e of the sheet molded body 3 before the injection resin portion 8 is formed. The configuration is substantially the same as the configuration shown in FIGS. 1 to 13D described above. 15 to 22, the same parts as those in the first embodiment shown in FIGS. 1 to 13D are denoted by the same reference numerals, and detailed description is omitted.

  As shown in FIGS. 15 and 16, the first molded rib 3 for the injection molded container 10 is not provided in the sheet molded body 3 before the injection resin portion 8 is formed according to the present embodiment. For this reason, as shown in FIG. 15, a portion of the body sheet 3 a of the sheet molded body 3 located below the second stack rib 36 is arranged from the lower side (the bottom sheet 3 b side) to the upper side (the flange sheet 3 c). Side).

  Next, the injection molded container 10 according to the present embodiment will be described with reference to FIGS.

  As shown in FIGS. 17 and 18, in the injection-molded container 10, a first stack rib 35 for the injection-molded container 10 that protrudes radially inward is provided on the inner surface 3 e of the sheet molded body 3. In this case, as will be described later, the first stack rib 35 is used to form the sheet molding 3 in the injection molding die 50 by the injection pressure of the injection resin forming the injection resin portion 8 in the step of manufacturing the injection molding container 10. Are formed by partially deforming. As shown in FIG. 18, the first stack rib 35 includes an upper surface 35a and an inclined surface 35b extending downward from the upper surface 35a. The inclined surface 35b is inclined so that the diameter gradually decreases from the lower side (the bottom sheet 3b side) to the upper side (the flange section sheet 3c side). As shown in FIG. 17, a portion of the inner surface 3e of the body sheet 3a of the sheet molded body 3 located below the first stack rib 35 is arranged from the lower side (the bottom sheet 3b side) to the upper side (the flange section). It has a shape in which the opening area gradually increases toward the sheet 3c side).

  Further, in the present embodiment, the projection 11a formed on the body 11 of the injection resin portion 8 is solidified while pressing the body sheet 3a of the sheet molded body 3 toward the inner surface 3e. In this case, the protrusion 11a protrudes inward in the radial direction and has a curved shape.

  Next, a method for manufacturing the injection molded container 10 will be described with reference to FIGS.

  First, the sheet molded body 3 is obtained by subjecting the sheet-shaped laminated body 23 to vacuum molding or air pressure molding. Next, the formed sheet molded bodies 3 are stacked in a state where a plurality of the sheet molded bodies 3 are stacked (see the lower part of FIG. 19).

  Next, the sheet moldings 3 are separated and lifted one by one from the stacked sheet moldings 3 (see the middle part of FIG. 19).

  Next, the injection molding die 50 is prepared, and the sheet molded body 3 is attached to the core 510 (the lower core 510a) of the injection molding die 50 by suction (see the upper part of FIG. 19). At this time, a gap S1 is formed between the portion corresponding to the second stack rib 36 of the sheet molded body 3 and the lower core 510a. Further, a gap S2 is formed between the lower core 510a and a portion of the sheet molded body 3 corresponding to the first stack rib 35 in the injection molded container 10.

  A label 4 is prepared in parallel with the production of the sheet molding 3. Next, the label 4 is mounted on the inner peripheral surface of the cavity-side mold 52 of the injection molding die 50, and the label 4 is fixed on the inner peripheral surface of the cavity-side mold 52 by vacuum suction.

  Next, as shown in FIG. 20, the lower core 510a of the core 510 is mounted in the cavity-side mold 52, and a slide mold 53 that is slidable in the lateral direction is mounted on the cavity-side mold 52. The core 510 (the lower core 510a and the upper core 51b), the slide mold 53, and the stripper plate 54 are clamped to the mold 52.

  Next, an injection resin is injected from a gate 52 a provided at the center of the bottom of the cavity-side mold 52.

  During this time, in the injection molding die 50, the molten injection resin reaches a portion corresponding to the first stack rib 35 (see FIGS. 17 and 18) of the sheet molded body 3. At this time, as shown in FIG. 21, the injection resin presses the body sheet 3a of the sheet molded body 3 from the outer surface 3d side to the inner surface 3e side by the injection pressure, and solidifies in this state. At this time, the trunk sheet 3a is pressed toward the above-described gap S2 (see FIG. 19) (see arrow a4 in FIG. 21). Therefore, the trunk sheet 3a is deformed, and the first stack rib 35 is formed. Further, the injection resin is solidified in a state where the body sheet 3a of the sheet molded body 3 is pressed toward the inner surface 3e, whereby the projection 11a is formed on the injection resin portion 8.

  During this time, the molten injection resin in the injection molding die 50 reaches the second stack rib 36 of the sheet molded body 3. Then, as described above, the second stack ribs 36 are crushed by the injection resin, and the inner surface 3e of the trunk sheet 3a after the injection of the injection resin is extended substantially in a straight line in a sectional view. In this way, the injection resin is solidified while pressing the second stack rib 36 toward the inner surface 3e.

  Next, as described with reference to FIGS. 13A to 13C, the injection molded container 10 is taken out from the injection mold 50.

  Next, a plurality of injection molded containers 10 are stored in a state of being stacked (see the lower part of FIG. 22). Also in the present embodiment, in the injection molded container 10, a first stack rib 35 for the injection molded container 10, which protrudes radially inward, is provided on the inner surface 3e of the sheet molded body 3. Accordingly, when a plurality of molded injection-molded containers 10 are stacked, the leg portion 12a of one injection-molded container 10 becomes the first portion of the other injection-molded container 10 located below the one injection-molded container 10. It contacts the stack rib 35. Then, the stacked injection-molded containers 10 are stored without being fixed.

  Next, the injection molded container 10 is filled with contents such as food. At this time, the injection molded containers 10 are separated and lifted one by one from the stacked injection molded containers 10 (see the upper part of FIG. 22). In this case, since the first stack rib 35 for the injection-molded container 10 is provided in the injection-molded container 10, the stacked injection-molded containers 10 do not adhere to each other. Can be lifted one by one.

  The injection-molded container 10 is filled with contents such as food and the lid 20 is attached to the flange portion 13 to seal the injection-molded container 10.

  As described above, according to the present embodiment, the first molded rib 3 for the injection molded container 10 that protrudes radially inward is provided on the sheet molded body 3 before the injection resin portion 8 is formed. Not been. For this reason, it is possible to improve the handleability of the sheet molded body 3 when transporting the sheet molded body 3 or when separating and lifting the sheet molded bodies 3 one by one from the stacked sheet molded bodies 3.

  Also in the present embodiment, in the injection molded container 10, the first stack rib 35 for the injection molded container 10 is provided on the inner surface 3 e of the sheet molded body 3 and protrudes radially inward. Thereby, when the plurality of injection molded containers 10 are stacked, it is possible to suppress the injection molded containers 10 from sticking to each other. Therefore, when the injection molded containers 10 are separated individually, they can be easily separated.

  A plurality of constituent elements disclosed in the above embodiments can be appropriately combined as needed. Alternatively, some components may be deleted from all the components described in the above embodiment.

3 Sheet molded body 3d Outer surface 3e Inner surface 4 Label 8 Injection resin part 10 Injection molding container 10A Container with lid 11 Body
12 Bottom part 13 Flange part 14 Cylindrical part 15 Outer screw 16 Circumferential groove 17 Reinforcement rib 18 Second circumferential protrusion 20 Lid 21 Top surface part 22 Side part 25 Inner screw 27 First circumferential protrusion 35 First stack rib 36 2 stack rib 50 Injection mold 51 Core 52 Cavity side mold 53 Slide mold 510 Core

Claims (12)

A cup-shaped injection-molded container to which a lid having a top surface portion, a side surface portion provided on a lower peripheral edge of the top surface portion, and a first fitting portion provided on an inner peripheral surface of the side surface portion is mounted. At
An outer surface, an inner surface, a sheet molded body having gas barrier properties,
A trunk formed on the outer surface of the sheet molded body, a bottom provided below the trunk, a flange provided above the trunk, and a cylinder provided above the flange. And an injection resin portion having a
An injection-molded container, wherein the cylindrical portion has a second fitting portion fitted to the first fitting portion of the lid.   The injection molded container according to claim 1, wherein the second fitting portion has a screw structure or a plugging structure that fits with the first fitting portion of the lid.   The injection-molded container according to claim 1, wherein a first stack rib for the injection-molded container that protrudes radially inward is provided on an inner surface of the sheet molded body.   The injection molded container according to claim 3, wherein a plurality of the first stack ribs are provided along a circumferential direction.   The sheet molded body has a second stack rib for the sheet molded body formed so as to protrude from the outer surface side toward the inner surface side, and the injection resin portion includes the second stack rib. The injection molded container according to any one of claims 1 to 4, wherein the injection molded container is solidified while being pressed toward the inner surface side.   The injection molded container according to claim 5, wherein a plurality of the second stack ribs are formed along a circumferential direction.   The injection molded container according to any one of claims 1 to 6, wherein a label is provided outside the injection resin portion.   The injection molded container according to claim 7, wherein a circumferential groove is formed at an end of the outer peripheral surface of the cylindrical portion on the flange portion side.   The injection-molded container according to claim 8, wherein a plurality of reinforcing ribs extending in a vertical direction are provided in the circumferential groove formed on the outer peripheral surface of the cylindrical portion. An injection molded container according to any one of claims 1 to 9,
A container with a lid, comprising: the lid. An outer surface, an inner surface, a sheet molded body having gas barrier properties,
A body formed on the outer surface of the sheet molded body, a bottom provided below the body, a flange provided above the body, and a cylinder provided above the flange. In the method of manufacturing an injection-molded container, the injection-molded container having a shape portion, and having an injection-resin portion, having a cavity-side mold and a core, is manufactured using a mold assembly.
Attaching the sheet molded body to the core,
A step of mounting a core in the cavity-side mold, and mounting a slide mold slidable laterally on the cavity-side mold,
Injecting an injection resin so as to press the sheet molded body against the core, in a space between the cavity-side mold, the core, and the slide mold,
Forming the body between the cavity-side mold and the core,
Forming the flange between the cavity mold and the slide mold,
A method for manufacturing an injection molded container, wherein the cylindrical portion is formed between the core and the slide mold. The method further includes a step of attaching a label to the cavity-side mold,
In the step of injecting the injection resin, the sheet molded body is pressed against the core in a space between the cavity-side mold, the core, and the slide mold, and the label is attached to the cavity-side mold. The method for manufacturing an injection molded container according to claim 11, wherein the injection resin is injected so as to be pressed against a mold.