JP7004237B2 - Manufacturing method of sheet molded body, injection molded container and injection molded container - Google Patents

Description

The present invention relates to a sheet molded body, an injection molded container and a method for manufacturing an injection molded container.

Sheet-molded products made from synthetic resin sheets are widely used in stores such as supermarkets and convenience stores as packaging containers for storing foods and delicatessen in small portions or individually. Such a sheet molded body is formed by vacuum forming, pneumatic forming, or the like, and it has been proposed that the flange portion is bent and processed into a complicated shape in order to improve the strength of the container and prevent deformation. (For example, Patent Document 1).

It has also been proposed to inject an injection resin onto the outer surface of a sheet molded body made of a synthetic resin sheet to produce an injection molded container (for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2011-42377 JP-A-2017-65693

However, in the injection molded container shown in Patent Document 2, for example, when the flange portion of the sheet molded body is processed into a complicated shape, the complicated shape of the flange portion is deformed by the heat and pressure of the injection resin during injection molding, resulting in molding defects. There is a risk of becoming. Therefore, it is difficult to process the flange portion into a complicated shape.

Further, if the flange portion has a flat shape from the inner edge to the outer edge, it may not be possible to sufficiently secure the strength of the sheet molded body. In this case, the sheet molded body may be deformed when the sheet molded body is conveyed or when the sheet molded body is mounted on the mold. In particular, when the sheet molded body is conveyed, the flange portion may be warped upward because the sheet molded body is generally handled by supporting the flange portion of the sheet molded body from below. In this case, the work efficiency of the sheet molded body transfer work and the like is lowered, and the production efficiency of the injection molded container is lowered. Therefore, deformation of the flange portion of the sheet molded body is a concern.

The present invention has been made in consideration of such points, and is capable of suppressing deformation of the flange portion of the sheet molded body and improving the productivity of the injection molded container, such as a sheet molded body and an injection molded container. And to provide a method for manufacturing an injection molded container.

The present invention is a sheet molded body for manufacturing an injection molded container by injecting an injection resin onto an outer surface, wherein the body sheet, the bottom sheet provided at the lower end of the body sheet, and the body sheet. The flange portion sheet is provided with a flange portion sheet provided at the upper end, and the flange portion sheet is a sheet molded body characterized in that it descends from an inner edge toward an outer edge.

The present invention is a sheet molded body characterized in that the flange portion sheet descends from the inner edge toward the outer edge over the entire circumference.

The present invention is a sheet molded body characterized in that the inclination angle of the flange portion sheet with respect to a horizontal plane is 3 ° or more and 15 ° or less.

The present invention is an injection-molded container manufactured by using the sheet-molded article according to the present invention, characterized in that a label is provided on the outside of the injection resin.

The present invention is a method for manufacturing an injection molded container, which comprises a step of mounting the sheet molded body according to the present invention on a mold and a step of injecting the injection resin onto the outer surface of the sheet molded body. ..

The present invention further comprises a step of attaching a label to the mold, and is a method for manufacturing an injection molded container, characterized in that the injection resin is injected between the label and the sheet molded body.

As described above, according to the present invention, it is possible to suppress the deformation of the flange portion of the sheet molded body and improve the productivity of the injection molded container.

FIG. 1A is a side sectional view showing an injection molded container according to an embodiment of the present invention. FIG. 1B is a plan view showing an injection molded container according to an embodiment of the present invention. FIG. 2 is a developed view showing a label having a body label and a bottom label. FIG. 3 is an assembly drawing showing a label having a body label and a bottom label. FIG. 4A is a plan view showing a sheet molded product according to an embodiment of the present invention. FIG. 4B is a side sectional view showing a sheet molded product according to an embodiment of the present invention. FIG. 5 is an enlarged view showing the sheet molded product of FIG. FIG. 6A is a side sectional view showing a state in which a conventional sheet molded body is supported by a handling device. FIG. 6B is a side sectional view showing a state in which the sheet molded body according to the embodiment of the present invention is supported by a handling device. FIG. 7A is a side sectional view showing an example of a laminated structure of a sheet molded body. FIG. 7B is a side sectional view showing another example of the laminated structure of the sheet molded body. FIG. 8 is a side sectional view showing a laminated structure of labels. FIG. 9 is a side sectional view showing a mold. FIG. 10A is a diagram showing a method for manufacturing an injection molded container according to the present invention. FIG. 10B is a diagram showing a method for manufacturing an injection molded container according to the present invention. FIG. 11A is a diagram showing a method for manufacturing an injection molded container according to the present invention. FIG. 11B is a diagram showing a method for manufacturing an injection molded container according to the present invention. FIG. 11C is a diagram showing a method for manufacturing an injection molded container according to the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, the scale, aspect ratio, etc. are appropriately changed from those of the actual product and exaggerated for the convenience of illustration and comprehension.

1A to 11C are diagrams showing embodiments of the present invention.

First, the injection-molded container according to the present embodiment will be described with reference to FIGS. 1A and 1B. In the injection molding container according to the present embodiment, a label having a heat seal layer is set in a mold in advance at the time of injection molding, and the heat seal layer of the label is fused to the surface of the injection resin by the heat of the resin at the time of molding. It is an in-mold label container obtained by the above.

As shown in FIGS. 1A and 1B, the injection molded container 10 includes a substantially square cylindrical body portion 11 having a flange portion 14 and a bottom portion 12 connected below the body portion 11.

Further, the injection molded container 10 has a sheet molded body 3, a label 4 having at least a body label 5 and a bottom label 7, and an injection resin 8 interposed between the sheet molded body 3 and the label 4. is doing.

Of these, the sheet molded body 3 is located inside in the thickness direction of the injection resin 8, the body sheet 3a, the bottom sheet 3b provided at the lower end of the body sheet 3a, and the flange provided at the upper end of the body sheet 3a. It has a part sheet 3c. The body sheet 3a, the bottom sheet 3b, and the flange sheet 3c correspond to the body portion 11, the bottom portion 12, and the flange portion 14 of the injection molded container 10, respectively, and the sheet molded body 3 has a container shape. Such a sheet molded body 3 may have a gas barrier property as a whole. Further, a gate receiving portion 33, which will be described later, is formed in the central portion of the bottom sheet 3b of the sheet molded body 3.

Further, the label 4 is located outside in the thickness direction of the injection resin 8, and has a body label 5 corresponding to the body 11 and a bottom label 7 corresponding to the bottom 12. Such a label 4 may have a gas barrier property as a whole. Further, a gate hole 7a for injecting the injection resin 8 is formed in the center of the bottom label 7. The gas barrier property referred to here means at least an oxygen barrier property, but may be a water vapor barrier property in addition to the oxygen barrier property.

Further, as shown in FIG. 2, the body label 5 and the bottom label 7 constituting the label 4 are integrally formed. The body label 5 has a plurality of portions 5a, 5b, 5c, and 5d extending outward in the plane direction from the peripheral edge of the bottom label 7. In this way, the peripheral edge of the label 4 is defined by the bottom label 7 and the four portions 5a, 5b, 5c, 5d of the body label 5. Such a label 4 can be produced by punching a laminate 24, which will be described later, with a laser or the like.

Further, the body label 5 does not exist between the portions 5a, 5b, 5c, and 5d of the body label 5, and a gap is formed. In this case, as shown in FIG. 3, in the injection molding container 10, the portions 5a, 5b, 5c, and 5d do not overlap each other, and a gap is formed between the portions 5a, 5b, 5c, and 5d of the body label 5. Will be done.

By the way, as shown in FIGS. 1A and 1B, the body portion 11 of the injection molding container 10 has a flange portion 14. The flange portion 14 has a flange portion sheet 3c provided at the upper end of the body sheet 3a of the sheet molded body 3 and an injection resin 8 injected onto the flange portion sheet 3c.

The contents are filled in the injection molding container 10 having such a structure. Next, the lid material 30 composed of the aluminum layer 30a and the heat seal layer 30b is adhered to the flange portion 14 of the injection molding container 10, and the injection molding container 10 is sealed.

Next, the sheet molded body 3 will be further described with reference to FIGS. 1A and 4A to 7B.

As shown in FIGS. 1A, 4A and 4B, the sheet molded body 3 receives the gate 22a described later of the mold 20 described later on the surface on the label 4 side (see FIG. 9), and is from the gate 22a. A gate receiving portion 33 for receiving the injection resin 8 is provided. The gate receiving portion 33 is formed in a concave shape having a tapered shape so as to be pulled toward the core 21 side of the mold 20 described later. Further, the core 21 of the mold 20 is formed with a recess 21a having a shape corresponding to the gate receiving portion 33. As a result, the gate receiving portion 33 of the sheet molded body 3 can be fitted into the recess 21a of the core 21, and the sheet molded body 3 can be reliably mounted on the core 21 (see FIG. 9). ).

Further, as shown in FIG. 5, the flange portion sheet 3c of the sheet molded body 3 descends from the inner edge 3d toward the outer edge 3e. That is, the inner edge 3d is located above the outer edge 3e in a state where the bottom sheet 3b of the sheet molded body 3 is grounded (FIG. 4B). Thereby, the direction dependence of the deformation of the flange portion sheet 3c can be exhibited. That is, by molding the flange portion sheet 3c of the sheet molded body 3 so as to descend from the inner edge 3d toward the outer edge 3e, the deformation of the flange portion sheet 3c, for example, the warp can be directed downward. As a result, when a force is applied to the flange sheet 3c from above to below, the flange sheet 3c may warp downward, but a force is applied to the flange sheet 3c from below to above. In this case, the bending can be suppressed so that the flange sheet 3c does not warp upward. The flange sheet 3 of the sheet molded body 3 is deformed by the heat and pressure of the injection resin 8 when the injection molded container 10 is molded, and in the injection molded container 10, the flange sheet 3c is parallel to the horizontal plane. It has become. Therefore, the heat-sealing property when the lid material 30 described later is adhered to the flange portion 14 of the injection molding container 10 is not impaired.

By the way, in general, as shown in FIGS. 6A and 6B, when the sheet molded body 3 is conveyed or mounted on a mold 20 to be described later, the handling device 40 is used to use the handling device 40 to form the flange portion sheet 3c of the sheet molded body 3. The sheet molded body 3 is conveyed while supporting the sheet from below. At this time, as shown in the comparative example of FIG. 6A, when the flange portion sheet 3 is formed parallel to the horizontal plane, when the handling device 40 supports the flange portion sheet 3c from below, the flange portion sheet 3c May warp upward from the inner edge 3d and deform so that the body sheet 3a enters inward. In this case, for example, it becomes difficult to mount the sheet molded body 3 on the mold 20, the work efficiency of the transport work of the sheet molded body 3 is lowered, and the production efficiency of the injection molded container 10 is lowered. On the other hand, as shown in FIG. 6B, according to the present embodiment, the flange portion sheet 3c is formed so as to descend from the inner edge 3d toward the outer edge 3e, so that the handling device 40 is formed with the flange portion sheet. When the 3c is supported from below, it is possible to prevent the flange portion sheet 3c from bending upward from the inner edge 3d.

Further, the flange portion sheet portion 3c descends from the inner edge 3d toward the outer edge 3e over the entire circumference thereof. As a result, it is possible to improve the strength against deformation of the flange portion sheet 3c that warps upward. That is, when the flange sheet 3c descends from the inner edge toward the outer edge 3e over the entire circumference in this way, as shown in FIG. 4A, the flange sheet 3c is parallel to the horizontal plane (the virtual line of FIG. 4A (the virtual line of FIG. 4A). Compared with the two-dot chain line)), the total length of the outer edge 3e of the flange sheet 3c is shorter in a plan view. In this case, in order to deform the flange sheet 3c so as to be parallel to the horizontal plane, a pulling force is required to extend the flange sheet 3c. As a result, the strength against deformation of the flange sheet 3c that warps upward is improved, and when a force is applied to the flange sheet 3c from below to above, the flange sheet 3c is prevented from warping upward. be able to.

Here, as shown in FIG. 5, the flange sheet 3c preferably has an inclination angle θ of the flange sheet 3c with respect to the horizontal plane of 3 ° or more and 15 ° or less, and further preferably 5 ° or more and 10 ° or less. preferable. By setting the inclination angle of the flange sheet 3c with respect to the horizontal plane to 3 ° or more, the direction dependence of the deformation of the flange sheet 3c can be exhibited. Further, by setting the inclination angle of the flange sheet 3c with respect to the horizontal plane to 15 ° or less, when the sheet molded body 3 is attracted to the core 21 described later of the mold 20, the flange sheet 3c and the core 21 are in close contact with each other. It is possible to suppress the deterioration of sex. Further, in the cross section (FIG. 5) along the width direction of the flange portion sheet 3c, the surface of the flange portion sheet 3c extends linearly, but the present invention is not limited to this, and the surface of the flange portion sheet 3c may be curved. ..

The thickness T of such a sheet molded body 3 can be, for example, 300 μm or more and 1000 μm or less, although it depends on the configuration of the injection molded container 10 to be manufactured. Further, the length L from the inner edge 3d to the outer edge 3e of the flange sheet 3c, that is, the length L along the inclination direction of the flange sheet 3c can be, for example, 4 mm or more and 7 mm or less.

By the way, the sheet molded body 3 includes a body sheet 3a having a flange sheet 3c and a bottom sheet 3b as described above, and has a container shape. In this case, the sheet molded body 3 is composed of a sheet-shaped laminated body 23 having a layer structure as shown in FIGS. 7A and 7B.

That is, as shown in FIG. 7A, the laminate 23 constituting the sheet molded body 3 has a polypropylene layer (PP) 23a as a synthetic resin layer sequentially arranged from the outside and ethylene vinyl as a gas barrier layer having a gas barrier property. It contains an alcohol copolymer layer (EVOH) 23b and a polypropylene layer (PP) 23c as an adhesive layer. As shown in FIG. 7B, the laminate 23 constituting the sheet molded body 3 is a polypropylene layer (PP) 23a as a synthetic resin layer sequentially arranged from the outside, an oxygen absorbing resin layer 231b, and a barrier layer 232b. , The oxygen absorbing resin layer 233b, and the polypropylene layer (PP) 23c as the adhesive layer may be included.

Then, by vacuum forming the sheet-shaped laminated body 23 configured in this way, the sheet molded body 3 having a container shape can be obtained.

Next, the label 4 having the body label 5 and the bottom label 7, and the injection resin 8 will be described below.

First, label 4 will be described. The label 4 having the body label 5 and the bottom label 7 is composed of a laminated body 24 having a layer structure as shown in FIG.

That is, as shown in FIG. 8, the label 4 having the body label 5 and the bottom label 7 has (i) an adhesive layer 24a with the injection resin 8, (ii) a synthetic resin layer 24b, and (iii) a gas barrier layer. It is composed of 24c and (iv) a printing substrate layer 24d (here, the layer (i) and the layer (ii) can be used in combination). Each of these layers 24a, 24b, 24c, and 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-extruded). It can also be formed by. Further, the printing substrate layer can be omitted depending on the application and purpose.

The adhesive layer 24a is not particularly limited as long as it adheres to the injection resin 8, but usually, it adheres to a plastic made of the same material as the injection resin 8, polyethylene containing EVA (ethylene-vinyl acetate copolymer), or the like. A resin having properties, or a plastic film in which the resin is co-extruded or coated, or the like can be preferably used.

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

The gas barrier layer 24c includes, for example, (a) an aluminum foil (7 to 25 μm), (b) a metal or a metal oxide laminated on a plastic film or the like by vapor deposition or the like, for example, a silicon oxide vapor deposition plastic film or an aluminum oxide vapor deposition. Examples thereof include plastic films, aluminum vapor-deposited plastic films, (c) and others, polyacrylonitrile-based resins, EVOH (ethylene vinyl alcohol copolymers), PVDC (polyvinylidene chloride) films, PVDC-coated biaxially stretched plastic films, and the like, which are desired. It can be appropriately selected according to the performance. When the sheet molded body 3 has sufficient gas barrier properties, the label 4 does not necessarily have to have the gas barrier layer 24c.

The film as the printing substrate 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.

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 having the body label 5 and the bottom label 7, for example, a label having the following layer structure can be used.

(1) Heat-sealed stretched polypropylene layer (HSOPP) 30 μm / aluminum foil 7 μm / stretched polypropylene layer (OPP) 30 μm
(2) Heat-sealed stretched polypropylene layer (HSOPP) 30 μm / VM-PET 12 μm / 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

Further, as the injection resin 8 used in the injection molding container 10 of the present invention, an injection moldable thermoplastic resin such as polypropylene, polyethylene, polystyrene or the like can be used.

Next, the mold 20 for in-mold molding will be described.

As shown in FIG. 9, the mold 20 has a core 21 for adsorbing the sheet molded body 3 and a mold 22 with a cavity for adsorbing the label 4. Of these, the core 21 is formed with a recess 21a having a tapered shape corresponding to the gate receiving portion 33 of the sheet molded body 3 described above. As a result, the gate receiving portion 33 of the sheet molded body 3 is fitted into the recess 21a of the core 21, and the sheet molded body 3 can be reliably mounted on the core 21.

The mold 22 with a cavity is formed with a protrusion 22b that penetrates the gate hole 7a of the label 4 when the label 4 is mounted. A spout 22a for injecting the injection resin 8 is formed on the protrusion 22b, and the injection resin is formed on the label 4 by injecting the injection resin 8 from the spout 22a.

Next, a method for manufacturing an injection molded container will be described with reference to FIGS. 10A to 11C.

First, by vacuum forming the sheet-shaped laminated body 23, a sheet molded body 3 having a container shape having a body sheet 3a, a bottom sheet 3b, and a flange sheet 3c is obtained. At this time, the flange portion sheet 3c is formed so as to descend from the inner edge 3d toward the outer edge 3e. Thereby, the direction dependence of the deformation of the flange portion sheet 3c can be exhibited, and the deformation of the flange portion sheet 3c, for example, the warp can be directed downward. Therefore, when a force is applied from the lower side to the upper side of the flange portion sheet 3c, it is possible to prevent the flange portion sheet 3c from bending upward.

Further, the flange portion sheet portion 3c is formed so as to descend from the inner edge 3d toward the outer edge 3e over the entire circumference thereof. As the flange sheet 3c descends from the inner edge toward the outer edge 3e over the entire circumference in this way, the outer edge 3e of the flange sheet 3c is compared with the case where the flange sheet 3c is parallel to the horizontal plane. The total length is shortened (see FIG. 4A), and in order to deform the flange sheet 3c so as to be parallel to the horizontal plane, a pulling force is required to extend the flange sheet 3c. As a result, the strength against deformation of the flange sheet 3c that warps upward is improved, and when a force is applied to the flange sheet 3c from below to above, the flange sheet 3c is prevented from warping upward. be able to.

Further, the inclination angle θ (see FIG. 5) of the flange sheet 3c with respect to the horizontal plane can be 3 ° or more and 15 ° or less. As a result, the direction dependence of the deformation of the flange portion sheet 3c can be exhibited, and when the sheet molded body 3 is adsorbed on the core 21 described later of the mold 20, the flange portion sheet 3c and the core 21 It is possible to suppress the decrease in the adhesiveness of the product.

Further, in parallel with the production of the sheet molded body 3, a label 4 having a body label 5 and a bottom label 7 is prepared. At this time, first, the laminated body 24 is prepared. Next, the laminate 24 is punched out with a laser or the like to obtain the label 4.

Next, as shown in FIG. 10A, a mold 20 having a core 21 and a mold 22 with a cavity is prepared.

Next, as shown in FIG. 10B, the sheet molded body 3 is mounted on the mold 20. In this case, the sheet molded body 3 is adsorbed on the core 21 of the mold 20. In this case, the handling device 40 supports the flange sheet 3c of the sheet molded body 3 and brings the sheet molded body 3 close to the core 21 of the mold 20. At this time, the flange portion sheet 3c is formed so as to descend from the inner edge 3d toward the outer edge 3e over the entire circumference, and the direction dependence of the deformation of the flange portion sheet 3c is exhibited, and the flange portion sheet 3c is warped. It is designed to go downward. As a result, the sheet molded body 3 can be brought closer to the core 21 without the flange portion sheet 3c bending upward. Next, the sheet molded body 3 is attracted to the core 21 by a vacuum device (not shown) of the mold 20. In this case, the inclination angle θ of the flange sheet 3c with respect to the horizontal plane can be 15 ° or less. As a result, it is possible to suppress a problem that the adhesion between the sheet molded body 3 and the core 21 is lowered.

Next, as shown in FIG. 11A, the label 4 having the gate hole 7a through which the injection resin 8 passes is attached to the mold 20. In this case, the label 4 is adsorbed on the mold 22 with a cavity of the mold 20.

Next, the injection resin 8 is injected between the label 4 mounted on the mold 20 and the sheet molded body 3. At this time, first, the core 21 is brought close to the cavity-equipped mold 22, the core 21 is inserted into the cavity-equipped mold 22, and the cavity-equipped mold 22 and the core 21 are clamped. Next, in this state, the injection resin 8 is injected into the space between the cavity-equipped mold 22 and the core 21 from the gate (injection port) 22a of the injection resin 8 provided in the cavity-equipped mold 22 (FIG. 11B). In this case, the spout 22a is formed in the protrusion 22b formed on the mold 22 with a cavity, penetrates the gate hole 7a of the bottom label 7, and protrudes into the mold 20. The injection resin 8 ejected from such a spout 22a penetrates between the sheet molded body 3 and the label 4 through the gate hole 7a provided in the label 4, and the injection resin 8 allows the sheet molded body 3 and the label to enter. 4 is adhered to and the injection molding container 10 is molded.

At this time, the injection resin 8 that has entered between the sheet molded body 3 and the label 4 from the gate hole 7a spreads radially between the bottom sheet 3b of the sheet molded body 3 and the bottom label 7 of the label 4. To go. In this case, since the sheet molded body 3 is provided with a gate receiving portion 33 having a tapered shape for receiving the injection resin 8, the injection resin 8 ejected from the injection port 22a is received by the gate receiving portion 33, and then the gate receiving portion 33 is provided. The tapered gate receiving portion 33 allows the injection resin 8 to be smoothly guided in the horizontal direction between the sheet molded body 3 and the label 4.

Then, as shown in FIG. 11C, the obtained injection molding container 10 is taken out from the mold 20 to the outside.

As described above, according to the present embodiment, the flange portion sheet 3c descends from the inner edge 3d toward the outer edge 3e. Thereby, the direction dependence of the deformation of the flange portion sheet 3c can be exhibited, and the deformation of the flange portion sheet 3c, for example, the direction of warping can be directed downward. Therefore, when an upward force is applied to the flange portion sheet 3c from below, it is possible to prevent the flange portion sheet 3c from bending upward. As a result, deformation of the flange portion 3c of the sheet molded body 3 can be suppressed, and the productivity of the injection molded container 10 can be improved.

Further, according to the present embodiment, the flange portion sheet 3c descends from the inner edge 3d toward the outer edge 3e over the entire circumference. As a result, the strength against deformation of the flange sheet 3c that warps upward is improved, and when a force is applied to the flange sheet 3c from below to above, the flange sheet 3c is prevented from warping upward. be able to.

Further, according to the present embodiment, the inclination angle of the flange sheet 3c with respect to the horizontal plane is 3 ° or more and 15 ° or less. As a result, the strength of the flange sheet 3c can be effectively increased, and by setting the inclination angle of the flange sheet 3c with respect to the horizontal plane to 15 ° or less, the sheet molded body 3 is made into the core described later of the mold 20. It is possible to prevent the adhesion between the flange sheet 3c and the core 21 from being lowered when the flange sheet 3c is attracted to the core 21.

In the above embodiment, the injection molded container 10 is an in-mold label container in which the label 4 is provided on the outer side of the injection resin 8 in the thickness direction, but the present invention is not limited to this, and the injection molded container 10 is not limited to this. May be composed of the sheet molded body 3 and the injection resin 8 without the label 4. In this case, in the step of injecting the injection resin 8, the injection resin 8 is injected onto the outer surface of the sheet molded body 3.

It is also possible to appropriately combine the plurality of components disclosed in the above-described embodiment as necessary. Alternatively, some components may be deleted from all the components shown in the above embodiment.

3 Sheet molded body 3a Body sheet 3b Bottom sheet 3c Flange sheet 3d Inner edge 3e Outer edge 4 Label 5 Body label 7 Bottom label 7a Gate hole 8 Injection resin 10 Injection molding container 11 Body 12 Bottom 20 Mold 21 Core 22 Cavity Mold 40 Handling device

Claims (4)

The process of attaching the sheet molded body to the mold and
A step of manufacturing an injection molded container by injecting an injection resin onto the outer surface of the sheet molded body is provided .
The sheet molded body is
With the torso seat,
The bottom sheet provided at the lower end of the body sheet and
A flange seat provided at the upper end of the body seat is provided.
The flange portion sheet descends from the inner edge toward the outer edge.
In the process of manufacturing the injection-molded container, the flange sheet is deformed by the injection resin, and the flange sheet is deformed.
A method for manufacturing an injection-molded container , wherein the flange sheet is parallel to a horizontal plane in the injection-molded container. Further provided with a step of attaching a label to the mold,
The method for manufacturing an injection-molded container according to claim 1 , wherein the injection resin is injected between the label and the sheet-molded body. The method for manufacturing an injection-molded container according to claim 1 or 2, wherein the flange portion sheet descends from the inner edge toward the outer edge over the entire circumference. The method for manufacturing an injection-molded container according to any one of claims 1 to 3, wherein the inclination angle of the flange sheet with respect to a horizontal plane is 3 ° or more and 15 ° or less.

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