JP2014237477A - Cup container, and metal mold for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cup container capable of sanitarily protecting a food product stored in a storage recess by suppressing the deformation of an adhesive surface of a flange part, preventing partial adhesive failure of a heat seal, and surely sealing the storage recess by a lid body.SOLUTION: A cup container is such that: a flange part 4 injection molded by plastic and outward protruding to the upper end of a peripheral wall part 2 is formed; a cut-out part 10 whose cross-sectional shape is almost reverse U-shape is provided on the underside of the flange part 4 and the outer surface upper part of the peripheral wall part; and a chamfer part CA continuously chamfered in the circumferential direction is provided on the outer edge of the flange part 4. The lower end edge of the chamfer part CA is set in a radial direction inside from the outer edge of the adhesive joint of the upper end surface of the flange part 4 to which a lid body 20 is heat-sealed.

Description

  The present invention relates to a cup container for use in foods in containers such as cup ramen, cup soup, cup miso soup, and cups, and a mold for a cup container for producing the cup container, in particular, the contents of the cup container. A cup container used for heat-sealing the outer peripheral edge of a lid to a flange portion provided on the opening side of an accommodating recess for accommodating and sealing the contents, and a cup container used for manufacturing the cup container Regarding molds.

  A cup container used for foods in containers such as cup ramen and cup soup is generally composed of a bottomed cylindrical body whose diameter is slightly enlarged on the upper side, and contains the contents provided in the cup container. Therefore, the sealed state is maintained by closing the opening side of the housing recess for closing with a lid. In this type of cup container, the receiving recess generally contains dried food such as dry noodles and powdered soup, and the lid is heat sealed to a flange provided on the opening side of the receiving recess. The food contained in the accommodation recess is hygienically protected by sealing the accommodation recess with the body.

  However, since the outer edge of the flange portion of the conventional cup container is formed as a corner portion of approximately 90 degrees, when eating and drinking contents such as ramen, the lip of the person in contact with the corner portion touches the mouth portion. There was a problem of being bad.

  In view of such conventional problems, for example, a cup container as described in Patent Document 1 is provided.

JP 2000-109044

  Patent Document 1 describes an example in which a lid formed in a predetermined shape is heat-sealed to a flange portion of a container body in a food manufacturing process. The cup container according to Patent Document 1 is a cup container that is injection-molded with a polyester resin, has a flange that projects outwardly at the upper end of the peripheral wall, and the outer edge of the flange is chamfered. The meat stealing portion is provided on the flange so that the vertical cross-sectional shape of the upper end portion of the peripheral wall that is continuous with the outer peripheral wall has a substantially inverted U shape.

  However, in the cup container described in Patent Document 1, the lid body is formed smaller than the flange portion of the cup container, and the outer peripheral edge of the lid body is located inside the outer peripheral edge of the flange portion. In addition, the meat stealing portion is provided on the lower surface of the flange portion, and when the lid body is heat-sealed to the flange portion, it is necessary to support the lower end of the chamfered portion with a support base. For this reason, when the outer peripheral edge of the lid is heated and pressed, the support point of the flange portion by the support base is outside the pressing portion of the lid, so that the chamfered portion is elastically deformed outward by the pressing force of the heat seal tool. Will do. As a result, it is difficult to make the outer peripheral edge of the lid uniformly contact the entire upper surface of the flange portion, and there is a problem that a uniform bonded portion cannot be obtained over the entire circumference.

  The present invention has been made in view of such conventional problems. When the outer peripheral edge of the lid is heat-sealed to the flange, the support point of the support base that supports the flange is defined as the lid. By setting the inner edge of the pressurizing part that presses the outer peripheral edge of the cup, it is possible to prevent the chamfered part of the flange part from being elastically deformed to the outside, and the cup having the flange part with good lid adhesion It aims at providing the metal mold | die suitable for manufacture of a container and its cup container.

  The cup container of the present invention is injection-molded with plastic, and a flange portion projecting outward is formed at the upper end of the peripheral wall portion, and the cross-sectional shape is substantially inverted U-shaped at the flange portion and the upper end of the peripheral wall portion continuous thereto. A cup container having a chamfered portion in which the outer edge of the flange portion is continuously chamfered in the circumferential direction, and the lower end edge of the chamfered portion is a flange portion where the lid body is heat-sealed. It is characterized in that it is set on the inner side in the radial direction from the outer edge of the adhesive portion on the upper end surface of the.

  The chamfered portion of the cup container may be chamfered in an arc shape at least at the upper edge and the lower edge of the flange portion, or may be chamfered in an arc shape continuously from the upper edge to the lower edge of the flange portion. .

  It is good to provide the groove-shaped thinning part extended continuously in the circumferential direction on the upper surface of the fleshing part of the flange part of a cup container.

  In the cup container mold of the present invention, a flange portion projecting outward is formed at the upper end of the peripheral wall portion, and the cross-sectional shape of the flange portion and the upper end of the peripheral wall portion continuous therewith is a substantially inverted U-shape. A cup container mold for forming a cup container having a chamfered part, and further having a chamfered part in which the outer edge of the flange part is continuously chamfered in the circumferential direction, and can be used to mold the cup container And the core has a cavity-side recess that forms the outer surface side of the cup container, and the core has a core-side protrusion that is inserted into the cavity-side recess to form the inner surface side of the cup container. Furthermore, the core includes a ring-shaped flat surface that forms an upper end surface of the flange portion to which the lid is heat-sealed, and a ring-shaped core that is continuous with the outer edge of the flat surface and continuous in the circumferential direction. Chamfer The cavity has a ring-shaped convex part that forms a ring-shaped part that forms a meat removing part, and a cavity side surface part that forms a ring shape that continues to the outside of the meat-thickening convex part and continues in the circumferential direction. The lower end edge of the cavity side chamfered portion is set radially inward from the outer edge of the flat portion of the core side chamfered portion.

  A contact surface between the core and the cavity of the cup container mold, and a first air vent passage is provided in a portion continuous from the core side surface chamfering portion to the cavity side surface chamfering portion. A second air vent passage may be provided in a portion continuous with the lower end edge.

  In addition, if a third air vent passage is provided in the cavity of the cup container mold between the upper edge and the lower edge of the cavity side chamfer, the air in the molding space can be vented more efficiently. Can do.

  In addition, the cup container of the present invention has a flange portion projecting outward at the upper end of the peripheral wall portion, a bottom plate portion formed at the lower portion of the peripheral wall portion, and inside the peripheral wall portion, the bottom plate portion, and the flange portion. It is a bottomed cup container in which an accommodation recess for accommodating noodles is formed, and a noodle support part for supporting noodles is provided on the inner surface of the peripheral wall part, and the noodle support part intersects the circumferential direction of the peripheral wall part It is characterized by being formed by a plurality of rib pieces extending in the height direction and provided at appropriate intervals in the circumferential direction.

  The height of the portion without the plurality of rib pieces is preferably set within a range of 20 mm to 40 mm from the upper surface of the bottom plate portion.

  According to the cup container of the present invention, when heat-sealing the lid to the flange part of the cup container, the deformation of the adhesive surface of the flange part is suppressed, and partial adhesion failure of the heat seal is prevented. It is possible to provide a cup container that can securely seal the housing recess and hygienically protect the food stored in the housing recess.

  According to the cup container mold of the present invention, when heat-sealing the lid body to the flange portion of the cup container, the deformation of the bonding surface of the flange portion is suppressed, and the partial adhesion failure of the heat seal is prevented. Thus, it is possible to provide a cup container mold that can manufacture a cup container that can reliably seal the housing recess.

The 1st Example of the cup container of this invention is shown, and is sectional drawing of the part rotated 90 degree | times. The 1st Example of the cup container of this invention is shown, The right half is a bottom view, The left half is a top view. It is the perspective view seen from the lower part while cut | disconnecting a part of cup container which concerns on 1st Example of this invention. It is explanatory drawing which expands and shows the flange part of the cup container which concerns on 1st Example of this invention. It is explanatory drawing explaining the state which heat-seals a cover body to the flange part of the cup container which concerns on 1st Example of this invention. It is explanatory drawing which expanded and showed the flange part which concerns on 2nd Example of the cup container of this invention. It is explanatory drawing which expanded the flange part which concerns on 3rd Example of the cup container of this invention, and expanded and was cross-sectional. It is sectional drawing which shows the 1st Example of the metal mold | die for cup containers of this invention. It is explanatory drawing which expands and shows the principal part of FIG.

Below, with reference to FIG. 1 thru | or FIG. 9, the example of implementation of the cup container of this invention is demonstrated.
First, a first embodiment of the cup container will be described with reference to FIGS.

  As shown in FIGS. 1 to 3, the cup container 1 according to the first embodiment of the present invention includes a cylindrical peripheral wall portion 2 in which the diameter on the upper end side is successively larger than the diameter on the lower end side, The bottom plate portion 3 is a bottom surface that closes the vicinity of the lower end portion of the peripheral wall portion 2, and the flange portion 4 is provided continuously to the upper end portion of the peripheral wall portion 2. An accommodation recess 5 for accommodating food such as ramen is formed in the cup container 1 surrounded by the peripheral wall portion 2, the bottom plate portion 3, and the flange portion 4.

  As shown in FIG. 1, a bulging portion 3a having a circular central portion and slightly bulging downward is provided at the central portion of the bottom surface portion 3 in order to increase the rigidity of the bottom surface portion 3 and increase the strength. It has been. The shape of the bottom surface portion 3 is not limited to the circular shape of this embodiment, and an elliptical shape, a square shape, a pentagonal shape, a hexagonal shape, an octagonal shape, and other various shapes can be applied. A ring-shaped leg portion 2 a is provided below the peripheral wall portion 2 and below the bottom surface portion 3.

  At a predetermined position on the outer surface of the peripheral wall portion 2, a grip portion 6 including a plurality of rib pieces 6 a for a consumer to grip the cup container 1 is provided. In addition, a stepped portion 7 that is continuous in the circumferential direction for improving the strength of the opening side of the housing recess 5 of the cup container 1 is provided on the upper portion of the peripheral wall portion 2. Further, a plurality of rib pieces forming noodles 8 such as ramen, buckwheat noodles, udon noodles, etc. accommodated in the accommodating recess 5 and forming a pouring space around the surroundings also serving as air vents at predetermined positions on the inner surface of the peripheral wall 2. A noodle support 9 made of 9a is provided. The grip 6 and the noodle support 9 are arranged at a predetermined interval so as not to overlap each other. In this embodiment, the gripping portion 6 and the noodle support 9 are opposed to each other so as to form a pair at positions that are rotated and displaced by 90 degrees.

  As shown in FIG. 4 in which the main part of FIG. 1 is enlarged, the flange part 4 is formed in a ring shape so as to be continuous with the upper end of the peripheral wall part 2 and project outward in the radial direction. On the lower surface of the flange portion 4 and the upper end portion of the outer surface of the peripheral wall portion 2 continuous to the flange portion 4, a meat take-up portion 10 having a substantially inverted U-shaped cross section is provided. The meat removal portion 10 is formed as a groove-like recess whose cross-sectional shape continuous in the circumferential direction forms a substantially inverted trapezoid. On the upper surface of the meat take-up portion 10, a thinning portion 11 formed of a groove-like recess having a substantially inverted trapezoidal cross-sectional shape is provided so as to be continuous in the circumferential direction so as to be concentric with the meat take-up portion 10. .

  A chamfered portion CA formed by continuously chamfering in the circumferential direction is provided on the outer edge of the flange portion 4. The chamfered portion CA includes an upper chamfered portion C1 formed at the upper outer edge of the flange portion 4, a lower chamfered portion C2 formed at the lower outer edge of the flange portion 4, and the upper chamfered portion C1 and the lower chamfered portion C2. The plane portion C3 is formed. However, the plane portion C3 is set as necessary, and the chamfered portion CA can be configured without the plane portion C3.

  In this embodiment, the chamfered portion CA is approximately 90 degrees from the upper end outer edge point P1 of the upper surface (upper end edge) of the flange portion 4 to the first intermediate point P3 that is the middle portion in the thickness direction of the flange portion 4 by the curvature radius R1. An arc-shaped convex part whose cross-sectional shape continuous over a range of ¼ is a quarter of a circle, a flat part C3 developed vertically from the first intermediate point P3 to the second intermediate point P4, and a radius of curvature R2. The cross-sectional shape continuous over a range of approximately 90 degrees from the intermediate point P4 to the lower end outer edge point P2 of the lower surface (lower end edge) of the flange portion 4 is formed as an arcuate convex portion forming a quarter of a circle. The upper chamfered portion C1 and the lower chamfered portion C2 that form the chamfered portion CA are not limited to the curved surface shown in this embodiment, and may be formed as a flat surface.

  Among the chamfered portions CA, it is preferable to provide a step ES having an appropriate size at the second intermediate point P4 of the flange portion 4 in consideration of molding using a mold. In this case, the step ES is set such that the lower chamfered portion C2 side is set inside the upper chamfered portion C1. Thereby, it is difficult to understand the presence or absence of the level difference ES, and it is possible to make it difficult to collect dust on the level difference ES. Note that the step ES is greatly illustrated in the drawing in order to emphasize its existence, but since the actual size is 0.1 mm or less, the description of the step ES is omitted in other drawings.

  The position of the lower end outer edge point P2 of the flange portion 4 is set to a position that is radially inward of the upper end outer edge point P1 in the radial direction of the cup container 1, and a displacement amount X (X> 0) is provided. The displacement amount X only needs to be larger than 0, but in order to surely prevent the elastic deformation of the flange portion 4 toward the outside in the radial direction, the displacement amount X is more preferably 0.2 mm or more. Thus, by setting the position of the lower end outer edge point P2 radially inward from the upper end outer edge point P1, the lower end outer edge point P2 is elastically deformed inward with respect to the pressurizing force at the time of heat sealing. It is possible to maintain the entire heat-sealed adhesion region DS from the inner edge point Q1 to the upper edge outer edge point P1 on a substantially flat surface. Note that it is preferable to provide a step ET having an appropriate size also at the lower edge portion P2 in consideration of molding using a mold. The step ET is also shown in the drawing in a similar manner to the step ES in order to emphasize its presence, but since the actual size is 0.1 mm or less, the description of the step ET is omitted in the other drawings.

  On the inner wall surface 16 of the beveling portion 10 formed on the back side of such a chamfered portion CA, a cutting angle α for facilitating the die cutting is formed. Further, the peripheral wall portion 2 is also formed with an inclination angle θ for facilitating the punching. Further, the thinning portion 11 is formed to be appropriately smaller than the width of the upper surface of the meat removal portion 10. In this embodiment, the thinning portion 11 is formed as a groove having a wide lower portion and an inverted trapezoidal cross section. However, the present invention is not limited to this. It can be formed into an arc shape, a rectangle, and other various shapes. According to this chamfered portion CA, even when the consumer touches the lips with the flange portion 4, the contact of the lips can be improved, so that the discomfort does not occur and the cup container can be comfortably used as tableware.

  As a dimension of each part of cup container 1 which has such composition, it can be set as the following values, for example. As thickness T1 of the surrounding wall part 2, the range of 0.3 mm to 0.8 mm is suitable, and the most preferable value is the range of 0.45 mm to 0.55 mm. If thickness T1 of the surrounding wall part 2 is 0.3 mm or more, there exists an advantage that it can form reliably as a surrounding wall part by injection molding. In particular, if the thickness T1 of the peripheral wall portion 2 is 0.45 mm or more, this effect becomes more remarkable. Moreover, if thickness T1 of the surrounding wall part 2 is 0.8 mm or less, there exists an advantage that it can be used without waste as a material. If the thickness T1 of the peripheral wall portion 2 is 0.55 mm or less, this effect becomes more remarkable. The thickness of the bottom surface portion 3 is the same as the thickness of the peripheral wall portion 2.

  The thickness T2 of the flange portion 4 is preferably in the range of 1 to 2 times the thickness T1 of the peripheral wall portion 2 (T2 = T1 to 2T1). That is, the thickness T2 of the flange portion 4 is preferably in the range of 0.3 mm to 1.6 mm, and the most preferable value is in the range of 0.5 mm to 1.0 mm. When the thickness T2 of the flange portion 4 is 0.3 mm or more, there is an advantage that the peripheral wall portion can be reliably molded while securing a certain strength by injection molding. In particular, if the thickness T2 of the flange portion 4 is 0.5 mm or more, this effect becomes more remarkable. Further, when the thickness T2 of the flange portion 4 is 1.6 mm or less, there is an advantage that it can be used without waste as a material while ensuring a sufficient strength. In particular, if the thickness T2 of the flange portion 4 is 1.0 mm or less, this effect becomes more remarkable.

  The thickness HA of the flange portion 4 is preferably in the range of 2.0 mm to 4.0 mm. If thickness HA of flange part 4 is 2.0 mm or more, chamfering part CA can be formed and there is an advantage that cup container 1 with good mouthfeel can be obtained. Moreover, if thickness HA of the flange part 4 is 4.0 mm or less, there exists an advantage that the material of the cup container 1 can be used without waste.

  When the value of the thickness HA of the flange portion 4 is within such a range, the height H1 of the upper chamfered portion C1 is 1.0 mm to 2.0 mm, and the height H2 of the lower chamfered portion C2 is 1.0 mm. To 2.0 mm, and the height H3 of the plane portion C3 is in the range of 0 ≦ H3 <2.0 mm. Further, the value of the depth M of the wall closing portion 11 is preferably set within the range of T1 ≧ T2-M ≧ T1 / 2 in relation to the thickness T1 of the peripheral wall portion 2. By setting the value of the depth M to a value within such a range, it is possible to prevent sink marks from occurring in the flange portion 4 and to ensure a smooth flow of molten plastic.

  The value of the drawing angle α of the inner surface formed on the back surface of the chamfered portion CA is preferably in the range of 10 degrees to 30 degrees. If the drawing angle α is 10 degrees or more, there is an advantage that the die-cutting from the molded product of the convex part for meat removal formed on the mold can be reliably performed. Moreover, when the draft angle α is 30 degrees or less, there is an advantage that waste of material can be suppressed while the meat removal portion 10 is reliably formed.

  The value of the chamfer angle β is preferably in the range of 30 degrees to 45 degrees. If the chamfering angle β is 30 degrees or more, there is an advantage that the fluidity of the molten plastic can be improved and the formation of nests (gas holes) can be prevented. Further, if the chamfering angle β is 45 degrees or less, there is an advantage that the fluidity of the molten plastic can be prevented from becoming higher than necessary and the formation of nests can be prevented.

  The value of the inclination angle θ of the peripheral wall portion 2 is preferably in the range of 4 degrees to 8 degrees. If the inclination angle θ is 4 degrees or more, there is an advantage that the core can be reliably pulled out. Further, when the inclination angle θ is 8 degrees or less, there is an advantage that the volumetric efficiency of the housing recess with respect to the size of the cup container can be improved.

  The value of the plane width WA of the upper surface of the flange portion 4 is preferably in the range of 4.0 mm to 6.0 mm. When the value is in such a range, heat sealing can be performed reliably, and sufficient sealing performance in the cup container 1 can be ensured. Since WA = W1 + W2, for example, when the width W2 of the chamfered portion CA is the radius R1 and is 1.0 mm to 2.0 mm, the plane portion W1 inside the upper edge point P1 is 3.0 mm to 5 mm. 0.0 mm.

  As shown in FIGS. 1 to 3, the rib piece 6 a of the grip portion 6 is formed on the outer surface of the peripheral wall portion 2 so as to extend from the step portion 7 to the vicinity of the bottom surface portion 3. In addition, the rib piece 9a of the noodle support 9 extends on the inner surface of the peripheral wall 2 from the step 7 to a position above the bottom 3 by a predetermined length (above the rib 6a of the grip 6). Is formed. In particular, the lower surface of the rib piece 9a is chamfered with a large curved surface, and a portion without the rib is formed below the rib piece 9a. Therefore, when the cup container 1 is used, the tip of the chopsticks does not contact the rib. In this way, the uncomfortable feeling of use due to chopsticks being caught is prevented. The height NR of the portion without the rib piece 9a is preferably in the range of 20 mm to 40 mm from the upper surface of the bottom plate portion 3. By setting the height NR of the portion without the rib piece 9a to a value in such a range, the uncomfortable feeling of use due to catching of chopsticks can be eliminated.

  The number of the rib pieces 6a and the rib pieces 9a is preferably 2 or more and 32 or less. If the number of rib pieces 6a is two or more, the gripping portion 6 can exert a function of avoiding heat. If the number of rib pieces 9a is two or more, the noodle support portion 9 can be made of noodles. There is an advantage that it can be supported at a predetermined position by preventing the lifting. Moreover, when the number of the rib pieces 6a and the rib pieces 9a is 32 or less, there exists an advantage that it can prevent that the waste as a material of the cup container 1 generate | occur | produces. In particular, when the number of the rib pieces 6a and the rib pieces 9a is eight or less, it is possible to further improve the effect that waste of material can be eliminated.

  The height of the rib piece 6a and the rib piece 9a (projection length in the radial direction) is preferably 1 mm to 2 mm. If the height of the rib piece 6a is 1 mm or more, the gripping part 6 can exhibit a function of avoiding heat. If the height of the rib piece 9a is 1 mm or more, the noodle support part 9 can be made of noodles. There is an advantage that it is possible to ensure the function of preventing the lifting and supporting it at a predetermined position. Moreover, when the height of the rib piece 6a and the rib piece 9a is 2 mm or less, there exists an advantage that it can prevent that the waste as a material of the cup container 1 generate | occur | produces.

  The width (thickness) of the rib piece 6a and the rib piece 9a is preferably 0.3 mm to 0.7 mm. If the rib piece 6a has a width of 0.3 mm or more, the gripping portion 6 can exhibit a function of avoiding heat. If the rib piece 9a has a width of 0.3 mm or more, the noodle support 9 There is an advantage that the function of preventing the noodles from being lifted and securing the noodles in place can be secured. Moreover, when the width | variety of the rib piece 6a and the rib piece 9a is 0.7 mm or less, there exists an advantage that generation | occurrence | production as a material of the cup container 1 can be prevented.

  FIG. 5 is a diagram illustrating a state in which the lid 20 is heat sealed to the flange portion 4 illustrated in FIG. 4. The lid 20 may be formed in advance in a shape commensurate with the outer shape of the flange portion 4 of the cup container 1, and after the lid sheet is heat-sealed, the lid sheet is cut into a predetermined shape. It may be. The cup container 1 supports a lower end outer edge point P2 of the flange portion 4 in a ring shape by a support base 22 from below, and the lid 20 is overlaid on the flange portion 4. And it heats with moderate pressure from the upper part of the cover body 20 with the heat seal tool which is not shown in figure, and the predetermined area | region (from the upper end outer edge point P1 which comprises the ring shape of the cover body 20 and the flange part 4 to the upper end inner edge point Q1 ( Adhesion area) DS is heat sealed.

  In this embodiment, the lower end outer edge point P2 supported by the support base 22 is located radially inward from the upper end outer edge point P1, which is the outer edge of the adhesion region DS by heat sealing (R1 <R2). The reaction force from the support base 22 against the pressing force can act on the flange portion 4 as a moment in the clockwise direction in FIG. The displacement amount X corresponding to the difference between the radius R2 and the radius R1 may be larger than 0. However, in order to reliably prevent the flange portion 4 from being elastically deformed outward in the radial direction, the displacement amount X is 0.2 mm. The above is more preferable.

  Thus, by setting the position of the lower end outer edge point P2 radially inward from the upper end outer edge point P1, the lower end outer edge point P2 is elastically deformed inward with respect to the pressurizing force at the time of heat sealing. It is possible to maintain the entire heat-sealed adhesion region DS from the inner edge point Q1 to the upper edge outer edge point P1 on a substantially flat surface. Therefore, the entire bonding area DS from the upper end inner edge point Q1 serving as the inner edge of the bonding area DS to the upper end outer edge point P1 can be maintained in a substantially plane, thereby causing no posture deformation or undulation in the bonding area DS. Alternatively, it is possible to obtain an advantage that the entire undulation region DS can be heat-sealed substantially uniformly while minimizing the undulation.

  FIG. 6 shows a second embodiment of the shape of the flange portion. The flange portion 24 according to the second embodiment is different from the flange portion 4 shown in FIG. 4 in that the curvature of the upper chamfered portion C1. The curvature radius R2 of the lower chamfered portion C2 is set to a smaller value than the radius R1 (R1> R2), and a flat portion C4 is provided that extends from the lower end outer edge point P2 to the lower end inner edge point P5 radially inward. It is. In the case of the flange portion 24 having such a shape, the position of the upper end outer edge point P1 is inside the position of the lower end outer edge point P2, but the upper end is outside the position of the lower end inner edge point P5 in the plane portion C4. By adopting a configuration in which the outer edge point P1 is positioned, a reaction force from the support base 22 against the pressing force of the heat sealer can be applied to the flange portion 24 as a moment in the clockwise direction in FIG. .

  Thus, even when the position of the lower end outer edge point P2 is set radially outward from the upper end outer edge point P1, the plane portion C4 is provided radially inward from the lower end outer edge point P2, and the lower end of the plane portion C4 is provided. By setting the inner edge point P5 radially inward from the upper end outer edge point P1, the lower end inner edge point P5 is elastically deformed inward with respect to the applied pressure at the time of heat sealing, and the upper end outer edge from the upper end inner edge point Q1. It is possible to maintain the entire heat-sealed adhesion region DS up to the point P1 on a substantially flat surface. Therefore, at the time of heat sealing, the entirety of the adhesion region DS can be maintained in a substantially flat surface, thereby heat-sealing the entire adhesion region DS substantially uniformly without causing any posture deformation or undulation in the adhesion region DS. The advantage that it can be obtained. The displacement amount X only needs to be larger than 0, but it is more preferable that the displacement amount X is 0.2 mm or more in order to surely prevent elastic deformation of the flange portion 24 outward in the radial direction.

  In this case, the value of the thickness HA of the flange portion 24 is preferably in the range of 2.0 mm to 4.0 mm, as in the case of the flange portion 4. In order to obtain a value in such a range, the height H1 of the upper chamfered portion C1 is 1.5 mm to 2.5 mm, the height H2 of the lower chamfered portion C2 is 0.5 mm to 1.5 mm, The height H3 is 0.0 mm to 2.0 mm. Since other configurations are the same as those of the first embodiment, the same portions are denoted by the same reference numerals, and redundant description is omitted. Even with the flange portion 24 having such a configuration, the same effect as the flange portion 4 can be obtained.

  FIG. 7 shows a third embodiment of the shape of the flange portion. The flange portion 25 according to the third embodiment is different from the flange portion 4 shown in FIG. 4 in that the center G1 of the radius of curvature R1 is different. And the center G2 of the curvature radius R2 is set to the same height. By configuring in this way, the displacement amount X can be set by setting the position of the lower edge portion P2 of the lower chamfered portion C2 radially inward from the position of the upper edge portion P1 of the upper chamfered portion C1. (X> 0). The displacement amount X corresponding to the difference between the radius R2 and the radius R1 may be larger than 0. However, in order to reliably prevent the flange portion 25 from elastically deforming outward in the radial direction, the displacement amount X is 0.2 mm or more. Is more preferable.

  Thus, by setting the position of the lower end outer edge point P2 radially inward from the upper end outer edge point P1, the lower end outer edge point P2 is elastically deformed inward with respect to the pressurizing force at the time of heat sealing. It is possible to maintain the entire heat-sealed adhesion region DS from the inner edge point Q1 to the upper edge outer edge point P1 on a substantially flat surface. Accordingly, also in the third embodiment, as in the case of the first embodiment, the entire bonding area DS can be maintained in a substantially flat state during heat sealing. There is an advantage that the entire bonding region DS can be heat-sealed substantially uniformly without causing undulation.

  In this case, the thickness HA of the flange portion 25 is preferably in the range of 2.0 mm to 4.0 mm. When the value is within such a range, for example, the height H1 of the upper chamfered portion C1 is 0.5 mm to 1.5 mm, and the height H2 of the lower chamfered portion C2 is 1.5 mm to 2.5 mm. The displacement amount X between the center G1 of the curvature radius R1 and the center G2 of the curvature radius R2 is a value in the range of 1.0 mm to 2.0 mm. Since other configurations are the same as those of the first embodiment, the same portions are denoted by the same reference numerals, and redundant description is omitted. Even with the flange portion 25 having such a configuration, the same effect as that of the flange portion 4 can be obtained.

  Although not shown, the present invention can be applied even when the plane portion H3 is set to 0 as a modification of the second embodiment shown in FIG. Even in this case, the displacement amount X only needs to be larger than 0. However, in order to reliably prevent elastic deformation of the flange portion toward the outside in the radial direction, the displacement amount X is more preferably 0.2 mm or more. Even with the flange portion having such a configuration, the same effect as the flange portion 4 can be obtained.

  The cup container 1 provided with the flange portions 4, 24, and 25 having the above-described configuration can be manufactured by injection molding using plastic as a material. As the plastic used in this case, for example, polypropylene (PP) is suitable, but other thermoplastics can of course be used.

  FIG. 8 shows an embodiment of an injection mold that can be used to manufacture the cup container 1 having the above-described configuration. The mold 30 includes a cavity 31 having a cavity-side concave portion 32 that forms the outer surface side of the cup container 1 and a core 33 having a core-side convex portion 34 that forms the inner surface side of the cup container 1. A molding space 35 having a space portion having a shape and size corresponding to the container 1 is formed.

  The cavity 31 includes a main cavity 36 that forms the outer surface of the cup container 1, a bottom cavity 37 that forms the bottom surface of the cup container 1, and a cavity insert A 38 and a cavity insert B 39 that form the lower surface of the flange portion 4. The main cavity 36, the bottom cavity 37, the cavity insert A38, and the cavity insert B39 form a cavity-side recess 32. The bottom cavity 37 is provided with a bottom plate convex portion 41 having a shape corresponding to the outer surface of the bottom plate portion 3 of the cup container 1, and an inlet 43 is opened at the front end surface of the bottom plate convex portion 41 at the center thereof. A gate 42 is provided. The bottom cavity 37 is fixed to a main body portion of an injection molding apparatus (not shown) by a fixing screw 49, and melted plastic is supplied from a side opposite to the injection port 43 of the gate 42.

  The main cavity 36 includes a conical peripheral wall hole 44 having a shape corresponding to the outer surface of the peripheral wall portion 2 of the cup container 1, and a plurality of ribs 6 a for forming the rib pieces 6 a of the grip portion 6 are formed in a predetermined range thereof. Slits 45 are provided at appropriate intervals in the circumferential direction. The bottom plate convex portion 41 of the bottom cavity 37 is detachably fitted to the small diameter side of the peripheral wall hole 44 of the main cavity 36. A cavity-side convex portion 47 that protrudes in a truncated cone shape is formed on the large-diameter side of the peripheral wall hole 44 of the main cavity 36. The cavity-side convex portion 47 is formed with an insert concave portion 48 having a ring shape, and a cavity insert A38 and a cavity insert B39 that form the lower chamfered portion C2 of the flange portion 4 are mounted on the insert concave portion 48. ing.

  As shown in FIG. 9 in which the main part of FIG. 8 is enlarged, the cavity insert A38 has a first half that forms the lower half of the curved surface from the second intermediate point P4 that forms the lower chamfered portion C2 to the lower edge point P2. The curved surface portion 51 is provided. A second air vent passage 54 is formed on the surface of the cavity insert A38 that contacts the main cavity 36. The cavity insert B39 has a second curved surface portion 52 that forms the upper half of the curved surface from the second intermediate point P4 that forms the lower chamfered portion C2 to the lower end outer edge point P2. A third air vent passage 55 is formed on the surface of the cavity insert B39 that contacts the cavity insert A38. The cavity insert B39 is detachably fixed to the main cavity 36 by a fixing screw 56, and the cavity insert A38 is detachably fixed at a predetermined position in the recess 48 for insert by being suppressed by the cavity insert B39.

  Inside the insert cavity 48 of the main cavity 36, a ring-shaped molded projection 57 is provided. This molding convex part 57 forms the meat removal part 10 and the thinning part 11 formed inside the flange part 4, and the guide part 12 is also formed if necessary. A cooling water channel 64 is provided in the main cavity 36.

  The core 33 includes a main core 50 and a stripper 40, and the core-side convex portion 34 is formed by the main core 50 and the stripper 40. The main core 50 is provided with a core-side recess 58 having a ring shape that fits into the cavity-side protrusion 47 of the main cavity 36. Furthermore, a plurality of slits 67 for forming the rib pieces 9 a of the noodle support 9 are provided on the outer peripheral surface of the core-side convex portion 34 of the main core 50. A stripper 40 that forms the upper surface side of the flange portion 4 is attached to the core-side recess 58 of the main core 50, and is detachably fixed to the main core 50 by a fixing screw 60. The stripper 40 has a flat surface portion 61 that forms the upper end surface of the flange portion 4, a curved surface portion 62 that forms the upper chamfered portion C1, and a flat surface portion C3 that is formed as necessary.

  A first air vent passage 53 is formed on the surface of the stripper 40 that contacts the cavity insert B39. A core-side air vent passage 59 is formed in a portion where the main core 50 and the stripper 40 are in contact with each other and facing the upper end surface of the flange portion space. The clearances of the first air vent passage 53, the second air vent passage 54, the third air vent passage 55, and the core side air vent passage 59 are actually as narrow as 0.1 mm or less. It is greatly expressed to emphasize. The core 33 is provided with a cooling water channel 65.

  According to the mold 30 having such a configuration, for example, the cup container 1 can be manufactured by the following operation. For example, the mold 30 is set in an injection molding device with the cavity 31 and the core 33 facing each other in the left-right direction and is used for manufacturing the cup container 1. At this time, only the bottom cavity 37 is fixed to the injection molding apparatus, the molten plastic is supplied to the gate 42, and the molten plastic is filled into the molding space 35 from the injection port 43. Other mold parts are configured to be able to approach and separate from the bottom cavity 37.

  When molten plastic is supplied from the pouring port 43 of the pouring gate 42, the pouring port 43 is opened at a substantially central portion of the space for the bottom plate portion, so that the molten plastic that has entered the space for the bottom plate portion is almost omnidirectional. It flows and flows into substantially the entire space for the peripheral wall portion, and flows into the flange portion 4 (24, 25) side from each direction. The molten plastic that has flowed to the flange portion 4 is guided by the flat surface portion 61 of the core-side recess 58 of the stripper 40 and flows to the front end side of the flange portion 4, and is guided by the curved surface portion 62 to be a space portion on the cavity 31 side. Flow into.

  At this time, the air present in the molding space 35 is first discharged to the outside from the core side air vent passage 59 by the pressure applied by the molten plastic, and further, the first air vent passage 53 and the third air vent passage 55. In addition, the air is sequentially discharged from the second air vent passage 54 to the outside. At this time, in the case where the molding space 35 has the curved surface portion 62, if the heat of the molten plastic is high, there is a property that air can easily accumulate in the molding space 35. On the other hand, as in the present embodiment, the third air vent passage 55 is provided in the lower chamfered portion C2, and the air is also vented from the third air vent passage 55. This makes it possible to more effectively prevent air from being trapped in the flange portion 4. In addition, when the guide part 12 is provided in the shaping | molding convex part 57 of the main cavity 36, the flow of a molten plastic can be made smoother, and it can prevent more effectively that an air pool is made.

  After filling the molding space 35 with the molten plastic, the plastic cup container 1 as a molded product can be taken out by opening the mold 30 when a predetermined time has elapsed. The take-out operation of the cup container 1 can be performed as follows, for example. First, all the mold parts except the bottom cavity 37 are moved away from the bottom cavity 37. Thereby, the bottom plate portion 3 of the cup container 1 is peeled from the bottom plate convex portion 41 of the bottom cavity 37.

  Next, when the mold part on the moving side moves a predetermined distance, the main cavity 36 and the cavity insert A38 and the cavity insert B39 fixed integrally therewith are stopped, while the main core 50 and the body insert integrally therewith are stopped. Further, the stripper 40 fixed to is moved by a predetermined distance. As a result, the outer surface of the cup container 1 is peeled from the peripheral wall hole 44 of the main cavity 36. Thereafter, the inner surface of the cup container 1 can be peeled off from the core-side convex portion 34 by projecting a protruding rod (not shown) installed in the main core 50 toward the bottom cavity 37. As a result, the molded cup container 1 can be taken out from the mold 30.

  In addition, according to the cup container 1 of the present invention, the noodle support 8 is provided in the housing recess 5 so that the noodle 8 can be held at a predetermined height in the housing recess 5. Therefore, when eating noodles 8 such as ramen, not only can the hot water be improved, but also a sufficient amount of hot water is poured over the noodles by preventing the noodles 8 from floating due to the injected hot water. Thus, the whole noodles 8 can be sufficiently warmed and eaten within a predetermined time. On the other hand, in the conventional cup container as described in Patent Document 1, since the noodle support 9 is not provided in the cup container 1 of the present invention, the hot water is not good when poured. However, when the hot water is added to some extent, the noodles are lifted by the buoyancy of the hot water, and the whole noodles cannot be uniformly heated. However, according to the cup container 1 of the present invention, such a problem occurs. The point can be solved.

  As described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within an equivalent range, and various modifications can be made within the scope of the invention described in the claims. It will be readily understood by those skilled in the art.

DESCRIPTION OF SYMBOLS 1 ... Cup container, 2 ... Perimeter wall part, 3 ... Bottom plate part, 4, 24, 25 ... Flange part, 5 ... Accommodating recessed part, 9 ... Noodle support part, 9a ... Rib piece, 10 ... Meat-removal part, 11 ... Meat shrink , 12 ... Guide part, 20 ... Lid, 22 ... Support base, 30 ... Mold, 31 ... Cavity, 32 ... Cavity side concave part, 33 ... Core, 34 ... Core side convex part, 35 ... Molding space, 36 ... Main cavity, 37 ... Bottom cavity, 38 ... Cavity insert A, 39 ... Cavity insert B, 40 ... Stripper, 41 ... Bottom plate convex part, 42 ... Spout, 50 ... Main core, 51 ... First curved surface part, 52 ... 2nd curved surface part, 53 ... 1st air vent path, 54 ... 2nd air vent path, 55 ... 3rd air vent path, 57 ... Molding convex part, 61 ... Flat surface part, 62 ... Curved surface part, CA ... Chamfered part , C1 ... upper surface Ri unit, C2 ... lower chamfer, P1 ... upper edge point, P2 ... bottom edge point, P3, P4 ... midpoint, theta ... inclination angle, alpha ... punching angle, beta ... chamfer angle

Claims (9)

A flange portion that is injection-molded by plastic and has an outwardly projecting flange portion at the upper end of the peripheral wall portion, and a bend portion having a substantially inverted U-shaped cross section on the lower surface of the flange portion and the outer surface upper portion of the peripheral wall portion. A cup container provided with a chamfered portion continuously chamfered in the circumferential direction on the outer edge of the flange portion,
A cup container, wherein a lower end edge of the chamfered portion is set radially inward from an outer edge of an adhesive portion of an upper end surface of the flange portion where the lid is heat sealed. The cup container according to claim 1, wherein the chamfered portion is chamfered in an arc shape at least at an outer edge upper portion and an outer edge lower portion of the flange portion. The cup container according to claim 1, wherein the chamfered portion is chamfered in an arc shape continuously from an outer edge upper portion of the flange portion to an outer edge lower portion. The cup container according to any one of claims 1 to 3, wherein a groove-like thinning portion that extends continuously in the circumferential direction is provided on an upper surface of the meat removal portion of the flange portion. A flange portion projecting outward is formed at the upper end of the peripheral wall portion, and a beveling portion having a substantially inverted U-shaped cross section is provided on the lower surface of the flange portion and the outer surface upper portion of the peripheral wall portion. A mold for cup container for molding a cup container provided with a chamfered portion that is continuously chamfered in the circumferential direction on the outer edge of the part,
A cavity and a core capable of forming the cup container;
The cavity has a cavity-side recess that forms the outer surface side of the cup container,
The core has a core-side convex portion that is inserted into the cavity-side concave portion to form the inner surface side of the cup container,
Further, the core includes a ring-shaped flat surface that forms an upper end surface of the flange portion to which the lid body is heat-sealed, and a ring-shaped core that is continuous with the outer edge of the flat surface portion and is continuous in the circumferential direction. A side chamfer is provided,
The cavity is provided with a ring-shaped convex portion that forms a ring shape that forms the meat removal portion, and a cavity side surface portion that forms a ring shape that continues to the outside of the meat removal convex portion and continues in the circumferential direction. ,
The cup container mold, wherein a lower end edge of the cavity side chamfered portion is set radially inward from an outer edge of the flat portion of the core side chamfered portion. A first air vent passage is provided in a contact surface between the core and the cavity, the portion being transferred from the core side surface chamfering portion to the cavity side surface chamfering portion;
The cup container mold according to claim 5, wherein a second air vent passage is provided in a portion of the cavity that reaches a lower end edge of the cavity side chamfer. 7. The cup container gold according to claim 5, wherein a third air vent passage is provided in the cavity between the upper edge and the lower edge of the cavity side chamfer. Type. A flange portion projecting outward is formed at an upper end of the peripheral wall portion, and a bottom plate portion is formed at a lower portion of the peripheral wall portion, so that noodles are accommodated inside the peripheral wall portion, the bottom plate portion, and the flange portion. A bottomed cup container in which an accommodating recess is formed,
On the inner surface of the peripheral wall part, a noodle support part for supporting the noodles is provided,
The cup container, wherein the noodle support part is formed by a plurality of rib pieces extending in a height direction intersecting with a circumferential direction of the peripheral wall part and provided at an appropriate interval in the circumferential direction. The cup container according to claim 8, wherein a height of the portion without the plurality of rib pieces is in a range of 20 mm to 40 mm from an upper surface of the bottom plate portion.

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