JP2019198982A - Container molding device and method for producing the same - Google Patents

Abstract

To provide a container molding device and a method for producing the same capable of increasing the flexibility of the producible shape of a container while adopting molds with a simple constitution.SOLUTION: A container molding device comprises molds 10, 20 composed of hard members 11, 12 and a soft member 13. The force application part 12c of the hard member 12 applies force in a press direction to the force receive part 13d of the soft member 13, and the deformation part 13e of the soft member 13 deforms in a deformation direction different from the press direction. A mutual engaging state may be temporarily formed between the molds 10, 20 by the deformation of the soft member 13.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an apparatus for molding a container made of resin or the like by press molding, and a container manufacturing method using the apparatus.

  In convenience stores and the like, containers made of foamed resin are often used for the purpose of storing food. While the foamed resin is excellent in heat insulation and heat resistance, it is molded by press molding using a male and female mold due to factors such as the need for thickness and low fluidity during heating.

  FIG. 29 shows an example of such a container, and the conventional container 1 shown here includes a deep dish-shaped container body 2 and a lid 3 that covers the upper opening of the container body 2. Yes. The container body 2 is formed by press-molding a resin sheet made of a foamed resin such as foamed propylene using a male and female mold. The upper end portion of the outer periphery of the container body 2 has a fitting step 2a that protrudes radially outward so as to surround the entire edge, and a short cylindrical shape that rises upward from the outer edge of the fitting step 2a. A fitting wall 2b is formed. At the upper end of the fitting wall portion 2b, a flange portion 2c is formed that protrudes radially outward in a plane parallel to the upper end surface of the container body 2.

  The lid 3 is formed by vacuum forming or pressure forming a transparent resin sheet such as transparent polystyrene or transparent polyethylene. A fitting step 3a protruding outward in the radial direction so as to surround the entire edge, and an upper edge from the outer edge of the fitting step 3a are formed at the lower end of the inverted dish-shaped lid 3 that protrudes upward. A short cylindrical fitting wall portion 3b that rises so as to be bent is formed. At the upper end of the fitting wall portion 3b, a flange portion 3c is formed that protrudes radially outward in a plane parallel to the lower end surface of the lid 3.

  When the lid 3 is set on the container body 2, the fitting step 3 a of the lid 3 abuts on the fitting step 2 a of the container main body 2, and the outer peripheral surface of the fitting wall 3 b of the lid 3 is the container body 2. The lid 3 comes into contact with the container main body 2 in contact with the inner peripheral surface of the fitting wall 2b. Thus, the container body 2 and the lid 3 are fixed to each other by the fitting wall portions 2b and 3b of the container body 2 and the lid 3 being in close contact with each other. The container body 2 and the flange portions 2c and 3c of the lid body 3 overlap each other, and the entire container 1 can be easily held by having the flange portions 2c and 3c.

  Here, in the case of the container 1 shown in FIG. 29, the fitting wall portions 2b and 3b each having a short cylindrical shape have the same diameter in any portion in the height direction of the portions closely contacting each other. For this reason, the force which fixes fitting wall part 2b, 3b is not strong. Therefore, there is a possibility that the lid 3 is easily detached from the container main body 2 or the liquid inside leaks from the gap between the fitting wall portions 2b and 3b.

  In order to make the fixing state of the container main body 2 and the lid 3 stronger, the fitting wall portions 2b and 3b may be shaped to be reduced in diameter toward the upper side (opening side of the container main body 2). When the material of the container body 2 is a foamed resin, it is necessary to form by press molding as described above. In press molding using male and female molds, male and female molds must be fitted to each other and removed, so that there is a limit to the shape that can be molded. The so-called undercut (for example, the shape in which the container is reduced in diameter toward the opening) is difficult to manufacture with a normal mold in the case of press molding, and measures such as dividing the mold are required. .

  That is, in press molding, molds usually approach and separate from each other only in one direction (hereinafter, the direction in which the molds approach each other (approach direction) and the direction in which the molds separate (separation direction) are summarized. When the convex part of the other mold fits into the concave part of one mold, in order to fit and remove the molds without any trouble, When one mold is viewed from the other mold side, a member belonging to one mold must not be in front of a member belonging to the other mold. For this reason, when the container main body 2 as described above is formed by press molding, there is a limit even if the fitting wall portion 2b is provided with a reduced diameter shape, and the diameter cannot be reduced so much. If the diameter of the fitting wall portion 2b is greatly reduced upward, a part of the female member that forms the outer surface of the fitting wall portion 2b (the portion corresponding to the upper side of the fitting wall portion 2b) is a container. This is because it is positioned in front of a part of the male mold that molds the inner surface of the main body 2 (the part corresponding to the lower side of the fitting wall 2b), making it impossible to fit and remove the molds. (Hereinafter, “when the other mold fits into one mold, when one mold is viewed from the other mold side in the press direction, the member belonging to one mold is the other mold. The “positional relationship in front of the members belonging to“ is referred to as “interengaged state”).

  Therefore, as a technology that can solve such a weak point, the applicants of the present application have proposed a container, a container press forming apparatus, and a press forming method described in Patent Document 1 below. The press molding apparatus described in Patent Document 1 is configured such that container-side fitting portion forming pieces are separately arranged on the outer periphery of a cavity of a female mold, and each container-side fitting portion forming piece is movable in the radial direction. . On the inner peripheral side of the container side fitting portion forming piece arranged so as to surround the cavity, a container side inner fitting portion forming inclined surface is provided so as to form a shape whose diameter is reduced upward as a whole. When pressing, the container-side fitting portion forming piece is moved radially inward when the molds are close to each other, and radially outward when they are separated from each other, thereby reducing the diameter upward toward the upper end of the container body. This makes it possible to fit and remove the molds. That is, in the case of the container press forming apparatus described in Patent Document 1, in the press forming process, a part of the member constituting the female mold (container side fitting portion forming piece) is temporarily male with respect to the pressing direction. When viewed from the side, it is positioned in front of the male component member, and an interengaged state is produced. The mutual engagement state occurs only when the molds come close to each other in the press molding process, and in other processes, the mutual engagement state of the male and female molds is released. There is no hindrance. In this way, as shown in FIG. 30, the fitting wall portion 2 b having a shape whose diameter is greatly reduced upward can be formed by press molding with respect to the container body 2 made of foamed resin.

JP 2007-331774 A

  However, in the case of the press molding apparatus described in Patent Document 1 described above, since the female mold has a complicated division structure, there has been a demerit that the cost for manufacturing the mold increases. Moreover, since it is indispensable to move the container side fitting part formation piece divided and arranged in the radial direction, it is inevitable that a gap is formed between the container side fitting part formation pieces. For this reason, the raw material of the container main body 2 may enter the gap, and a slight distortion may be formed in that portion. If distortion occurs in the shape of the fitting wall 2b, it may affect the fitting state of the lid 3 with the fitting wall 3b.

  In view of such circumstances, the present invention intends to provide a container forming apparatus and a manufacturing method that can increase the degree of freedom of the shape of a container that can be manufactured while adopting a mold having a simple configuration.

  The present invention relates to a container forming apparatus provided with a mold composed of a hard member and a soft member.

  In the container molding apparatus of the present invention, the force-applying portion of the hard member applies a force in the pressing direction to the force-receiving portion of the soft member, and the deforming portion of the soft member has a deformation direction different from the pressing direction. It can be configured to be deformed.

  The container molding apparatus according to the present invention may include an abutting portion for restraining the soft member on the opposite side of the force applying portion across the force receiving portion of the soft member.

  The container forming apparatus of the present invention can be configured to define the deformation direction of the deformation portion by providing a slope on at least one of the force applying portion or the force receiving portion.

  The container molding apparatus of the present invention can be configured to temporarily form an interengaged state between the molds when the soft member is deformed.

  In the container forming apparatus according to the present invention, the soft member may be formed in a ring shape having a central axis along the pressing direction, and may be configured to be deformed in a radial direction with respect to a force applied in the pressing direction.

  In the container molding apparatus according to the present invention, the soft member may have a protrusion having an axis along the pressing direction, and the protrusion may be configured to expand in diameter with respect to a force applied in the pressing direction.

  In the container forming apparatus according to the present invention, the soft member has a hole having an axis along the pressing direction, and the hole can be configured to be reduced in diameter with respect to a force applied in the pressing direction.

  The container molding apparatus according to the present invention can include an insertion molding portion that is inserted in the press direction with respect to the insertion portion of the soft member as the hard member.

  In the container molding apparatus of the present invention, the insertion molding part has a shape extending along the pressing direction, the inserted part is a slit formed in the soft member, and the container material is the insertion molding part. And after inserting in the said slit, the said insertion molding part can be extracted from the said slit, and it can comprise so that the raw material of a container may be shape | molded by the said slit.

  In addition, the present invention relates to a method for manufacturing a container in which a mold composed of a hard member and a soft member is used, and a material for the container is formed while the soft member is deformed.

  In the container manufacturing method of the present invention, the deformation portion of the soft member is different from the press direction by the force applied in the press direction from the force applying portion of the hard member to the force receiving portion of the soft member. Can be transformed into

  In the container manufacturing method of the present invention, an interengagement state may be temporarily formed between the molds by deforming the deforming portion during pressing.

  In the container manufacturing method of the present invention, the hard member includes an insertion molding portion that is inserted in the press direction with respect to the insertion portion of the soft member, and the material of the container is combined with the insertion molding portion. After inserting into the insertion part, the said insertion molding part may be extracted from the said insertion part, and the raw material of a container may be shape | molded by the said insertion part.

  According to the container forming apparatus and the manufacturing method of the present invention, it is possible to obtain an excellent effect that the degree of freedom of the shape of a container that can be manufactured can be increased while adopting a mold having a simple configuration.

It is a top view which shows the form of the shaping | molding apparatus of the container by 1st Example of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a front sectional view which shows the form of the shaping | molding apparatus of the container by 1st Example of this invention, and has shown the one state where type | molds spaced apart. BRIEF DESCRIPTION OF THE DRAWINGS It is a front sectional view which shows the form of the container shaping | molding apparatus by the 1st Example of this invention, and has shown the one state where type | molds approached. It is a top view which shows the form of the soft member which comprises a type | mold in the 1st Example of this invention. It is a front sectional view showing the form of the soft member constituting the mold in the first embodiment of the present invention. It is a front sectional view which shows the form of the container manufactured with the shaping | molding apparatus of the container of 1st Example of this invention. It is a front sectional view explaining one step of the manufacturing process of the container by the container forming apparatus of the first embodiment of the present invention. It is a front sectional view explaining another one step of the manufacturing process of the container by the container forming apparatus of the first embodiment of the present invention. It is a front sectional view explaining another one step of the manufacturing process of the container by the container forming apparatus of the first embodiment of the present invention. It is a front sectional view explaining another one step of the manufacturing process of the container by the container forming apparatus of the first embodiment of the present invention. It is a front sectional view explaining another one step of the manufacturing process of the container by the container forming apparatus of the first embodiment of the present invention. It is a flowchart explaining the manufacturing method of the container by the container shaping | molding apparatus of 1st Example of this invention. It is a front sectional view which shows the form of the shaping | molding apparatus of the container by the 2nd Example of this invention, and has shown the one state where type | molds spaced apart. It is a front sectional view which shows the form of the shaping | molding apparatus of the container by the 2nd Example of this invention, and has shown the one state where type | molds approached. It is a top view which shows the form of the shaping | molding apparatus of the container by the 3rd Example of this invention. FIG. 16 is a cross-sectional view showing a state in which the molds of the container forming apparatus according to the third embodiment of the present invention are separated from each other, and is a view corresponding to an arrow XVI-XVI in FIG. FIG. 16 is a cross-sectional view illustrating a state where the molds of the container forming apparatus according to the third embodiment of the present invention are separated from each other, and is a view corresponding to the arrow XVII-XVII in FIG. 15. It is a top view which shows the one state where the type | molds of the container shaping | molding apparatus by the 3rd Example of this invention approached, and is a XVI-XVI arrow equivalent view of FIG. It is a top view which shows the one state where the type | molds of the container shaping | molding apparatus by the 3rd Example of this invention approached, and is a XVII-XVII arrow equivalent view of FIG. It is a top view which shows the form of the container manufactured with the shaping | molding apparatus of the container of the 3rd Example of this invention. It is sectional drawing which shows the form of the container manufactured with the shaping | molding apparatus of the container of the 3rd Example of this invention, and is a XXI-XXI arrow equivalent view of FIG. It is sectional drawing which shows the form of the container manufactured with the shaping | molding apparatus of the container of 3rd Example of this invention, and is a XXII-XXII arrow equivalent view of FIG. It is a front sectional view explaining one step of the manufacturing process of the container by the container forming apparatus of the fourth embodiment of the present invention. It is a front sectional view explaining another one step of the manufacturing process of the container by the container forming apparatus of the fourth embodiment of the present invention. It is a front sectional view explaining another one step of the manufacturing process of the container by the container forming apparatus of the fourth embodiment of the present invention. It is a front sectional view explaining another one step of the manufacturing process of the container by the container forming apparatus of the fourth embodiment of the present invention. It is a front sectional view explaining another one step of the manufacturing process of the container by the container forming apparatus of the fourth embodiment of the present invention. It is a flowchart explaining the manufacturing method of the container by the container shaping | molding apparatus of 4th Example of this invention. It is a front sectional view showing an example of a form of a conventional container. It is a front sectional view showing another example of the form of a conventional container.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIGS. 1-5 has shown an example of the form of the shaping | molding apparatus of the container by implementation of this invention. According to the container forming apparatus of the first embodiment, the container body 5 of the container 4 as shown in FIG. 6 can be manufactured. The configuration of the container 4 is substantially the same as that of the conventional container 1 shown in FIG. 29, and includes a deep dish-shaped container body 5 and a lid body 6 that covers the upper opening of the container body 5. .

  The container body 5 is formed by press-molding a resin sheet made of a foamed resin such as propylene foam (in addition to press molding, for example, a vacuum molding technique may be used in combination. good). The upper end portion forming the outer periphery of the container body 5 is fitted with a diameter-expanded portion 5a having a diameter increased upward, and a shape having a diameter reduced from the upper end of the diameter-expanded portion 5a upward (opening side). A mating wall portion 5b is provided, and the fitting wall portion 5b forms a conical surface of a short truncated cone as a whole. At the upper end of the fitting wall portion 5b, a flange portion 5c is formed that protrudes radially outward in a plane parallel to the upper end surface of the container body 5.

  The lid 6 is formed by vacuum forming or pressure forming a transparent resin sheet such as transparent polystyrene or transparent polyethylene. A fitting wall portion 6a having a shape that rises upward from the outer edge and is reduced in diameter is formed at the lower end portion that forms the outer periphery of the inverted dish-shaped lid body 6 that protrudes upward. The conjoining wall portion 6a has a short truncated conical surface as a whole. At the upper end of the fitting wall portion 6a, a flange portion 6b is formed that protrudes radially outward in a plane parallel to the lower end surface of the lid body 6.

  The container forming apparatus according to the first embodiment sandwiches a resin sheet S (see FIGS. 7 to 11), which is a material of the container, between two molds (female mold 10 and male mold 20), and performs press molding. It is an apparatus which shape | molds the container main body 5 of the container 4 shown in FIG.

  The female mold 10 includes first and second hard members 11 and 12 formed of a hard material such as metal, and a soft member 13 formed of a deformable material such as silicon rubber. As shown in FIGS. 1 to 3, the first hard member 11 forms the bottom of the female mold 10, and includes a deep dish-shaped cavity 11 c formed with a side surface 11 b around the bottom surface 11 a at the center. A portion corresponding to the radially outer side of the upper end portion of the cavity 11c is formed as an outer peripheral portion 11d surrounding the cavity 11c. And the soft member 13 and the 2nd hard member 12 which are mentioned later are installed in this outer peripheral part 11d.

  The outer peripheral portion 11d includes an outer wall portion 11e, an engaging convex portion 11f, and a butting portion 11g. The outer wall portion 11e extends downward from the upper end of the cavity 11c and forms a cylindrical wall surface as a whole. In other words, the side surface 11b that rises obliquely upward from the bottom surface 11a and forms the inner wall of the cavity 11c is folded downward at the upper end to become the outer wall portion 11e. The engaging convex portion 11f protrudes radially outward from the outer wall portion 11e, and engages with an engaging concave portion 13b of the soft member 13 described later. The abutting portion 11g protrudes from the lower end of the outer wall portion 11e toward the radially outer side in a plane parallel to the upper end surface of the cavity 11c, and constitutes a portion corresponding to the floor surface of the outer peripheral portion 11d.

  The 2nd hard member 12 is a member which comprises the upper part of the female type | mold 10, and is arrange | positioned at the outer peripheral part 11d of the 1st hard member 11 so that the outer side of the cavity 11c may be surrounded. The upper surface 12a of the second hard member 12 has a shape corresponding to the lower surface of the flange 5c (see FIG. 6) of the container body 5. The inner peripheral surface 12b of the second hard member 12 is a state in which the first hard member 11 and the second hard member 12 are combined, and the diameter at each height is the outer wall portion 11e of the first hard member 11 and the engagement. The dimensions are set to be larger than the diameter of the joint portion 11f. And the soft member 13 mentioned later is arrange | positioned between the outer wall part 11e and the internal peripheral surface 12b.

  On the upper side of the inner peripheral surface 12b, a slope 12c is formed in a tapered shape so that the diameter increases toward the lower side, and the portion of the inner peripheral surface 12b below the slope 12c has the same diameter at each height. It is cylindrical. The diameter of the lower end portion of the inner peripheral surface 12 b is set smaller than the radial dimension of the first hard member 11, and the lower surface 12 d of the second hard member 12 abuts against the butting portion 11 g of the first hard member 11. It is like that.

  The soft member 13 is a ring-shaped member as shown in FIGS. 4 and 5, and an engagement recess 13 b that is recessed outward in the radial direction is formed on the inner peripheral surface 13 a having a short cylindrical shape. The ring-shaped soft member 13 is installed in the female mold 10 so that the central axis is along the pressing direction (see FIGS. 1 to 3). On the upper side of the outer peripheral surface 13c, a slope 13d is formed in a taper shape so that the diameter increases toward the lower side, and the portion below the slope 13d of the outer peripheral surface 13c has a cylindrical shape having the same diameter at each height. It has become.

  2 and 3, the soft member 13 is installed on the first hard member 11 so that the engagement concave portion 13b is engaged with the engagement convex portion 11f of the first hard member 11. Is done. The portion of the inner peripheral surface 13a above the engaging recess 13b has a larger vertical dimension than the portion of the outer wall portion 11e of the first hard member 11 above the engaging protrusion 11f, and the soft member 13 has the first dimension. The upper part of the soft member 13 protrudes upward from the upper end of the cavity 11c of the first hard member 11 in a state where the hard member 11 is installed. Then, by applying an external force from above to the upper slope 13d of the outer peripheral surface 13c, a portion of the soft member 13 located above the upper end of the cavity 11c of the first hard member 11 is placed as shown in FIG. It is designed to be deformed so as to protrude radially inward. In this deformed state, the upper side of the inner peripheral surface 13a has a shape that decreases in diameter upward.

  Here, the “deformed portion” refers to a portion of the soft member that is deformed during pressing and is in contact with the container material on the surface, and the direction in which the deformed portion is deformed during pressing is referred to as “deformation direction”. And The deformation direction includes a deformation direction of the deformation portion when the molds are approaching each other (deformation direction when approaching) and a deformation direction when they are separated (deformation direction when separating).

  A portion formed by sandwiching a material between the deformation portion and the deformation portion is referred to as a “deformation receiving portion”. That is, in the case of the first embodiment, the portion indicated by reference numeral 13e in FIGS. 2 to 5 (the portion of the soft member 13 located above the upper end of the cavity 11c of the first hard member 11) is deformed. It corresponds to the part. Further, as will be described later, the upper end portion 20d of the side surface 20c of the male mold 20 corresponds to a deformation receiving portion.

  Furthermore, the portion that is formed on the hard member and applies force to the soft member at the time of pressing is the “forced portion”, and the portion that is formed on the soft member and receives force from the applied portion of the hard member at the time of pressing is the “power receiving portion” ". In the case of the first embodiment, the inclined surface 12c of the second hard member 12 corresponds to the force applying portion, and the inclined surface 13d of the soft member 13 corresponds to the force receiving portion. Further, the “butting portion” is defined as a portion that is located on the opposite side of the force applying portion with the force receiving portion sandwiched during pressing, and that restricts deformation and movement of the soft member and defines the deformation direction of the deforming portion. In the first embodiment, the abutting portion is the abutting portion 11g provided on the outer peripheral portion 11d of the first hard member 11, but the engaging convex portion 11f also functions as the abutting portion.

  In addition, support columns 14 are arranged at the four corners of the female mold 10. The column portion 14 includes a first hole 14a provided in the first hard member 11 on the lower side, a column 14b provided in the first hole 14a along the pressing direction, and a second hole on the upper side. The second hole 14c provided in the hard member 12 is provided. The first hole 14 a is provided at a position outside the outer peripheral portion 11 d at the four corners of the first hard member 11, and a column 14 b is installed at the center. The second holes 14 c are provided at positions corresponding to the first holes 14 a of the first hard member 11 at the four corners of the second hard member 12. It arrange | positions with respect to the 1st hard member 11 in the form inserted in the 2nd hole 14c. A coil spring 14d is disposed as an elastic body between the inner peripheral surfaces of the holes 14a and 14c and the outer peripheral surface of the support column 14b. The coil spring 14d is positioned between the second hard member 12 and the first hard member 11 in a state where the second hard member 12 is installed on the first hard member 11, and the first hard member 11 and the second hard member 12 are separated from each other in the vertical direction. Energize in the direction you want. Thus, the second hard member 12 is supported above the outer peripheral portion 11 d of the first hard member 11 via the support column 14. The female mold 10 is configured such that the soft member 13 is sandwiched between the first hard member 11 and the second hard member 12. The inner peripheral surface 13a of the soft member 13 contacts the outer wall portion 11e of the first hard member 11 in such a manner that the engaging concave portion 13b engages with the engaging convex portion 11f as described above, and the outer peripheral surface 13c is inclined by the slope 13d. Is wound around the inner peripheral surface 12b of the second hard member 12 in a form in contact with the inclined surface 12c.

  The male mold 20 is entirely formed of a hard material such as metal, and in the first embodiment, it is also defined as a third hard member constituting a part of the molds 10 and 20. The male mold 20 has a shape corresponding to the entire shape of the female mold 10 constituted by the first and second hard members 11, 12 and the soft member 13, and the surface of each part is the first and second hard members 11. , 12 and the surface formed by the soft member 13. The convex portion 20a of the male mold 20 inserted into the cavity 11c of the first hard member 11 has a bottom surface 20b and a side surface 20c facing the bottom surface 11a and the side surface 11b of the first hard member 11, and an upper end portion 20d of the side surface 20c. Further faces the inner peripheral surface 13a of the soft member 13 that protrudes upward from the cavity 11c formed by the first hard member 11. Further, the lower surface 20 f of the outer peripheral portion 20 e that protrudes radially outward from the upper edge of the upper end portion 20 d faces the upper surface 12 a of the second hard member 12.

  The shapes of the bottom surface 20b of the convex portion 20a and the portions below the upper end portion 20d of the side surface 20c correspond to the shapes of the bottom surface 11a and the side surface 11b of the first hard member 11, and the bottom surface 20f of the outer peripheral portion 20e. The shape corresponds to the shape of the upper surface 12 a of the second hard member 12. The shape of the upper end portion 20d of the side surface 20c corresponds to the shape of the portion corresponding to the deformed portion 13e of the inner peripheral surface 13a of the soft member 13. Here, the outer peripheral surface of the upper end portion 20d has the shape of the deformed portion 13e in the deformed state. It has a corresponding shape, that is, a shape whose diameter is reduced upward.

  Each figure shown here is a schematic diagram for explaining the gist of the present invention in the first embodiment. When the present invention is actually carried out, gas is applied to each part of the female mold 10 and the male mold 20. Although a hole or a structure for providing a rib or the like on the container body 5 is provided, illustration is omitted as appropriate (the same applies to second to fourth embodiments described later).

  In addition to the metals listed above, the hard members 11, 12, and 20 are heat-resistant and pressure-resistant materials that can be used in press molding, and the container body 5 has a good shape. Any material that does not easily deform to such an extent that it can be molded can be used. For example, ceramic or the like can be used in principle. Further, the soft member 13 is also a material having heat resistance and pressure resistance that can be used in press molding, and can retain the shape to such an extent that a part of the shape of the container body 5 can be molded, and is deformed by an external force. Any material can be used. For example, natural rubber or artificial rubber can be used in addition to silicon rubber.

  Next, the operation of the first embodiment will be described along the flowchart of FIG. 12 with reference to FIGS.

  Before the start of the molding process by press molding, the male mold 20 and the female mold 10 are separated from each other as shown in FIG. In the female mold 10, the second hard member 12 is placed on the soft member 13, and the weight of the second hard member 12 is equal to the elastic force of the elastic body 14d (see FIGS. 1 to 3). Further, it is supported by one or both of the forces repelling deformation of the soft member 13 (repulsive force). Therefore, the 1st hard member 11 and the 2nd hard member 12 are mutually spaced apart up and down, and the soft member 13 is a normal state which is not a deformation | transformation state. From this state, the heated male mold 20 and female mold 10 are sandwiched between the resin sheet S as a raw material, pressed, and rolled.

  In the press molding, first, as shown in FIG. 7, the resin sheet S is arranged between the male mold 20 and the female mold 10 (step S1), and from this point, as shown in FIG. The male mold 20 and the female mold 10 are moved closer to each other so as to be inserted into the cavity 11c of the female mold 10 (step S2). The resin sheet S is sandwiched between the male mold 20 and the female mold 10.

  When the male mold 20 and the female mold 10 are brought close to each other, the molds partially contact each other as shown in FIG. 9 (step S3). More specifically, the lower surface 20f of the outer peripheral portion 20e of the male mold 20 and the upper surface 12a of the second hard member 12 constituting the female mold 10 are in contact with the resin sheet S interposed therebetween. The flange 5c (see FIG. 6) of the container body 5 is formed here.

  When the male mold 20 is further pushed into the female mold 10, as shown in FIG. 10, the second hard member 12 is pushed downward by the outer peripheral portion 20e of the male mold 20, and the elastic body 14d (FIG. 2, FIG. 2). 3) and moves downward against the repulsive force of the soft member 13 (step S4).

  At the same time, the soft member 13 is deformed by the force applied from the second hard member 12 to the soft member 13. As described above, the slope 13d, which is a force receiving portion provided on the outer peripheral surface 13c of the soft member 13, is in contact with the slope 12c, which is a force applying portion provided on the inner peripheral surface 12b of the second hard member 12. A downward force is applied from the slope 12c to the slope 13d. By this force, as shown in FIG. 10, the soft member 13 is in a deformed state in which the deformed portion 13e is deformed so as to protrude radially inward. Of the soft member 13, a portion (a portion other than the deforming portion 13 e) located below the upper end of the side surface 11 b of the first hard member 11 is restricted by the first hard member 11 from moving or deforming radially inward. Therefore, the amount of protrusion of the deformable portion 13e toward the inside in the radial direction increases as it goes upward. In this way, the deformed portion 13e forms a shape that decreases in diameter toward the upper end of the cavity 11c of the female die 10. The second hard member 12 stops when the lower surface 12 d comes into contact with the abutting portion 11 g of the outer peripheral portion 11 d of the first hard member 11.

  In this step, the deformation of the soft member 13 is controlled by firstly the operation of the direction of force by the inclined surfaces 12c and 13d, and secondly by the movement and deformation by the hard members 11 and 12.

  In press molding, the male mold 20 and the female mold 10 are moved only in the pressing direction (in this case, the vertical direction in this case) approaching and separating from each other in principle. Here, a downward force is applied from the lower surface 20f of the outer peripheral portion 20e of the male mold 20 to the upper surface 12a to the second hard member 12 that first contacts the male mold 20 via the resin sheet S. In contrast, by applying a force from the second hard member 12 through the inclined surfaces 12c and 13d, the direction of the force applied downward from the male mold 20 is converted to the radially inward direction, and the deforming portion 13e is pressed. It is deformed so as to protrude in a direction (inward in the radial direction) different from the direction (vertical direction). Thus, if the inclined surface is formed in the force applying part 12c and the force receiving part 13d, the deformation direction of the deforming part 13e can be changed with a simple configuration with respect to the direction of the force applied from the force applying part 12c.

  Here, the slopes 12c and 13d are provided on both the second hard member 12 and the soft member 13 that are in contact with each other. However, a force is applied between the force applying portion of the hard member and the force receiving portion of the soft member. In changing the direction, it is not always necessary to provide slopes on both sides, and it is sufficient to provide slopes on either the force applying part or the force receiving part. However, it is preferable to provide both surfaces with a slope so that the external force applied to the soft member can be dispersed and the generated stress can be reduced, so that the durability of the soft member is ensured.

  At this time, the deformation and movement of the soft member 13 other than the deformation of the deformation portion 13e inward in the radial direction are limited by the hard members 11 and 12 arranged around the deformation member 13e. The deformation or movement outward in the radial direction is pressed down by the inner peripheral surface 12b including the inclined surface 12c of the second hard member 12, and the deformation or movement in the downward direction is an engagement convex portion of the first hard member 11. 11f, it is pressed down by the butting part 11g. In particular, the engaging projection 11f bites into the engaging recess 13b on the lower side of the deforming portion 13e, so that the deforming portion 13e is restrained from moving or deforming downward beyond the engaging projecting portion 11f. The deformation amount is directed radially inward, so that the deformation direction of the deformation portion 13e can be reliably defined. Further, the movement or deformation of the portion below the deforming portion 13e toward the inside in the radial direction is suppressed by the outer wall portion 11e of the first hard member 11.

  In this way, a shape is formed in the deformed portion 13e of the inner peripheral surface 13a of the soft member 13 that is reduced in diameter upward. Further, since the upper end portion 20d of the side surface 20c of the male mold 20 facing the deformable portion 13e originally has a shape whose diameter is reduced upward, there is an interaction between the female mold 10 including the soft member 13 and the male mold 20. A combined state is formed. And the shape of the fitting wall part 5b is shape | molded between the deformation | transformation part 13e and the upper end part 20d of the side surface 20c of the male type | mold 20 in this state. The deformation portion 13e forms the outer surface of the fitting wall portion 5b of the container body 5 (see FIG. 6), and the upper end portion 20d forms the inner surface of the fitting wall portion 5b as a deformation receiving portion. Further, a deep dish shape of the container body 5 is formed between the bottom surfaces 11a and 20b of the female mold 10 and the male mold 20 and between the side surfaces 11b and 20c (step S5).

  Thereafter, as shown in FIG. 11, the male mold 20 and the female mold 10 are separated from each other, and the resin sheet S is released (step S6). As the male mold 20 moves away from the female mold 10, the second hard member 12 pressed downward by the male mold 20 has the elastic force of the elastic body 14 d (see FIGS. 2 and 3) and the soft member 13. It moves upward due to the repulsive force. Due to the downward force applied from the second hard member 12, the soft member 13 in the deformed state deformed inward in the radial direction, which is the deformation direction when approaching, is in the deformation direction when separated due to the absence of the downward force. Deforms radially outward and restores to normal state. In steps S4 and S5, the deformed portion 13e, which has been deformed radially inward and reduced in diameter upward, returns to its original shape, so that it is molded into the shape of the male mold 20 and the container body 5. The resin sheet S can be taken out from the female mold 10 without any trouble. In addition, since the resin sheet S allows a certain amount of deformation, when the portion of the fitting wall portion 5b of the resin sheet S is removed from the upper end portion 20d of the side surface 20c of the male mold 20, the fitting wall is reduced in diameter upward. The shape of the part 5b and the upper end part 20d does not hinder removal.

  Thus, in the first embodiment, the resin sheet S as the material is molded while the soft member 13 is deformed while the female mold 10 and the male mold 20 are close to each other, and the deformed state of the soft member 13 is also obtained. The molds 10 and 20 are spaced apart from each other while returning to the original state, so that a mutual engagement state is temporarily generated between the female mold 10 and the male mold 20. Thus, even the container body 5 having a shape corresponding to an undercut (here, a shape whose diameter is reduced upward) can be formed by press molding.

  That is, normally, when trying to make a container having a shape that decreases in diameter toward the opening side like the container body 5 shown in FIG. The movement in the press direction is limited. For this reason, in the normal type | mold comprised only with the raw material which does not deform | transform, a shape like the fitting wall part 5b cannot be shape | molded. In the first embodiment, a part of the mold (here, the female mold 10) (the deformed portion 13e of the soft member 13) is deformed in a deformation direction (radial direction) different from the press direction (vertical direction) in the molding process. By temporarily causing the mutual engagement state, it is possible to form a shape whose diameter is reduced toward the opening without restricting the movement between the molds 10 and 20. In this way, if a part of the mold (soft member 13 of the female mold 10) is deformed in a pressing direction different from the pressing direction at the time of pressing, containers of various shapes that cannot be manufactured with conventional general molds can be formed and formed. It is possible to manufacture.

  When the lid body 6 molded separately by vacuum molding or pressure molding is set on the container body 5 thus molded as shown in FIG. 6, the lower end of the outer edge of the lid body 6 is between the enlarged diameter portion 5a and the fitting wall portion 5b. , The outer peripheral surface of the fitting wall portion 6 a comes into contact with the inner peripheral surface of the fitting wall portion 5 b of the container main body 5, and the lid body 6 is in an internally fitted state with respect to the container main body 5. The container body 5 and the flanges 5c and 6b of the lid body 6 overlap each other, and the entire container 4 can be easily held by having the flanges 5c and 6b.

  In this state, the fitting wall portions 5b and 6a of the container body 5 and the lid body 6 are in close contact with each other, but the fitting wall portions 5b and 6a each have a shape with a diameter decreasing upward. For this reason, the container body 5 and the lid body 6 are firmly fixed to each other so that the lid body 6 can be easily detached from the container body 5 or the liquid inside leaks from the gap between the fitting wall portions 5b and 6a. There is little risk of a bad situation. On the other hand, since the container body 5 and the lid body 6 are made of resin and allow a certain degree of deformation, the fitting wall portions 5b and 6a are attached to the container body 5 with the lid body 6 attached thereto. There is no hindrance in removing 6.

  The characteristics of the container and the technical idea relating to press molding are the same as in Patent Document 1. However, in the case of the first embodiment, the member that forms the outer surface of the fitting wall portion 5b of the container body 5 is more excellent in that it is integrally formed as the soft member 13 of the female mold 10. . That is, there is no gap in the portion corresponding to the outer surface of the fitting wall portion 5b in the female mold 10. For this reason, compared with the case where a container is manufactured by the container forming apparatus as described in Patent Document 1, the shape of the fitting wall portion 5b related to the fitting state with the lid body 6 is less likely to be distorted. Therefore, the fitting state of the container body 5 and the lid body 6 can be made better. Further, as compared with the container molding apparatus described in Patent Document 1, the divided structure of the female mold 10 is simple, so that the cost for manufacturing the female mold 10 can be reduced.

  In addition, when press molding is performed while deforming a part of the molds 10 and 20 in this way, the accuracy of the shape of the portion molded on the surface of the deformed portion 13e (the outer peripheral surface of the fitting wall portion 5b) is somewhat high. It cannot be denied that it falls. On the other hand, when fitting the container body 5 and the lid body 6, the accuracy of the shape of the fitting wall portion 5b is important. Therefore, in the first embodiment, the inner peripheral surface of the fitting wall portion 5b that requires higher accuracy is formed by the male mold 20 that is the third hard member, and the outer peripheral surface is formed by the soft member 13. And the precision of the inner peripheral surface of the fitting wall part 5b is ensured. That is, as in the example shown in FIG. 6, in the case of the container 4 of the type in which the lid body 6 is internally fitted to the container body 5, the accuracy on the inner peripheral surface side of the fitting wall portion 5 b of the container body 5. Is particularly important, when forming the fitting wall portion 5b, the outer peripheral surface side is formed by the soft deformation portion 13e, while the inner peripheral surface side is formed by the upper end portion 20d of the side surface 20c as a hard deformation receiving portion. It is molded.

  In addition, the shape and configuration of each mold described above are merely examples, and in implementing the present invention, the shape of the mold, the divided structure, the mutual joining structure, and the like can be appropriately changed. For example, in the first embodiment, in forming the container main body 5 as shown in FIG. 6, the first hard member 11 and the soft member 13 are suitably engaged with each other, and the deformation amount and deformation of the deformable portion 13e. The first hard member 11 and the soft member 13 are provided with an engaging convex portion 11f and an engaging concave portion 13b, respectively, so that the shape of the hour can be adjusted. The engaging convex portion 11f and the engaging concave portion 13b are essential. Alternatively, other shapes of engaging convex portions or engaging concave portions may be employed. The basis of the technical idea in the present invention is to provide a container molding apparatus with a mold composed of a hard member and a soft member, and the concrete shape and configuration of the mold and the members constituting the mold are manufactured. It should be designed according to the shape of the container and other conditions.

  As described above, the container molding apparatus according to the first embodiment includes the molds 10 and 20 including the hard members 11 and 12 and the soft member 13 to constitute the container molding apparatus. And in the manufacturing method of the container of this 1st Example, the raw material S of the container 4 is shape | molded using the type | molds 10 and 20 comprised by the hard members 11 and 12 and the soft member 13 while deform | transforming the soft member 13. FIG. doing.

  Further, in the container forming apparatus of the first embodiment, the applied portion 12c of the hard member 12 applies a force in the pressing direction to the force receiving portion 13d of the soft member 13, and the deformed portion 13e of the soft member 13 is It is configured to be deformed in a deformation direction different from the pressing direction. And in the manufacturing method of the container of this 1st Example, the deformation | transformation part 13e of the soft member 13 is applied by the force applied to the force receiving part 13d of the soft member 13 from the force application part 12c of the hard member 12 in the press direction. Is deformed in a deformation direction different from the pressing direction. By deforming the die (female die 10) in a pressing direction different from the pressing direction at the time of pressing, it is possible to mold and manufacture containers having various shapes that cannot be manufactured by a conventional general die.

  Further, the container forming apparatus of the first embodiment includes the abutting portions 11f and 11g for restraining the soft member 13 on the opposite side of the force applying portion 12c with the force receiving portion 13d of the soft member 13 interposed therebetween. If it does in this way, the direction of deformation of deformation part 13e can be specified more certainly by pressing down deformation and movement other than deformation part 13e.

  The container forming apparatus of the first embodiment is configured to define the deformation direction of the deformation portion 13e by providing a slope on at least one of the force applying portion 12c and the force receiving portion 13d. In this way, the deformation direction of the deformation portion 13e can be changed with a simple configuration with respect to the direction of the force applied from the force applying portion 12c.

  In addition, the container forming apparatus of the first embodiment is configured to temporarily form an interengaged state between the molds 10 and 20 when the soft member 13 is deformed. And in the manufacturing method of the container of the first embodiment, the deformed portion 13e is deformed at the time of pressing, so that the mutual engagement state is temporarily formed between the molds 10,20. If it does in this way, it is possible to shape | mold the shape which shrinks | reduces a diameter toward the opening part side in the container 4, for example.

  In the container forming apparatus of the present invention, the soft member 13 is formed in a ring shape having a central axis along the pressing direction, and is configured to deform in the radial direction with respect to a force applied in the pressing direction. By doing so, the container 4 can be more easily formed in a shape that reduces the diameter toward the opening side.

  Therefore, according to the first embodiment, the degree of freedom of the shape of the manufacturable container can be increased while adopting a mold having a simple configuration.

  13 and 14 show a container forming apparatus according to a second embodiment of the present invention. In the case of the second embodiment, of the dies 30 and 40, the female die 30 is the first hard member configured as one member, and the male die 40 is the second and third hard members 41 and 42 and the soft member. 43.

  The upper end portion 30c of the side surface 30b of the cavity 30a of the female die 30 has a diameter-expanding portion 30d having a shape that increases in diameter upward, and a diameter reduction that has a shape in which the diameter decreases from the upper end of the diameter-expanding portion 30d. A portion 30e is formed, and in the second embodiment, the enlarged diameter portion 30d and the reduced diameter portion 30e function as a deformation receiving portion. The upper end of the reduced diameter portion 30e is continuous with the upper surface 30g of the outer peripheral portion 30f.

  The second hard member 41 constitutes a convex portion of the male mold 40 inserted into the cavity 30a of the female mold 30, and has a shape corresponding to the bottom surface and the side surface of the cavity 30a.

  The third hard member 42 constitutes the base of the male mold 40, and the lower center portion is connected to the second hard member 41 by the support column 14. The strut portion 14 has the same configuration as the strut portion 14 (see FIGS. 1 to 3) in the first embodiment, and the first hole 14a provided in the second hard member 41 on the lower side, A column 14b provided in the first hole 14a and a second hole 14c provided in the third hard member 42 corresponding to the upper side are provided. Due to the elastic body (coil spring 14d) disposed between the inner peripheral surface of the first hole 14a and the outer peripheral surface of the support column 14b, the second hard member 41 and the third hard member 42 are in the vertical direction. It is urged in the direction away from.

  At a position closer to the inner side than the outer peripheral portion 42a of the third hard member 42, a substantially cylindrical protruding portion 42b protruding downward from the lower surface is provided. The side surface of the protruding portion 42b is formed as a tapered inclined surface 42c that decreases in diameter toward the bottom, and the soft member 43 is disposed here.

  The outer peripheral portion 42 a of the third hard member 42 is configured such that the lower surface 42 d faces the upper surface 30 g of the outer peripheral portion 30 f of the female mold 30.

  The soft member 43 is a ring-shaped member that is disposed so as to surround the side surface of the protruding portion 42b that protrudes below the third hard member 42, and has a tapered shape in which the inner peripheral surface is reduced in diameter toward the bottom. It is formed as a slope 43a. In the lower part of the outer peripheral surface of the soft member 43, there are a tapered diameter-increased portion 43b that increases in diameter upward, and a tapered diameter-reduced portion 43c that decreases in diameter from the upper end of the expanded diameter portion 43b. Is provided. The enlarged diameter portion 43b and the reduced diameter portion 43c are respectively opposed to the enlarged diameter portion 30d and the reduced diameter portion 30e provided at the upper end portion 30c of the side surface 30b of the female die 30 during press molding. The lower surface 43 d of the soft member 43 is in contact with the upper surface 41 a of the outer peripheral portion of the second hard member 41.

  A resin sheet (not shown) made of a material is sandwiched between the female mold 30 which is the first hard member and the male mold 40 constituted by the second and third hard members 41 and 42 and the soft member 43. When the male mold 40 is pressed against the female mold 30, the soft member 43 positioned between the upper surface 41a of the outer peripheral portion of the second hard member 41 and the protruding portion 42b of the third hard member 42 The slope 43a receives a downward force from the slope 42c formed on the protrusion 42b of the third hard member 42. That is, in the second embodiment, the inclined surface 42c of the third hard member 42 corresponds to the force applying portion, and the inclined surface 43a of the soft member 43 corresponds to the force receiving portion. The upper surface 41a of the second hard member 41 with which the lower surface 43d of the soft member 43 abuts functions as an abutting portion, and restricts downward movement and deformation of the soft member 43. The soft member 43 moves so as to slide upward with respect to the third hard member 42 along the inclined surface 42c, while being deformed so as to spread outward in the radial direction by the force received from the inclined surface 42c. That is, in the case of the second embodiment, the entire soft member 43 corresponds to the deformed portion.

  And the diameter-enlarged part 43b and the diameter-reduced part 43c provided on the outer peripheral surface of the soft member 43 spreading radially outward, and the diameter-enlarged part as the deformation receiving part provided on the upper end part 30c of the side surface 30b of the female die 30. The material is molded between the portion 30d and the reduced diameter portion 30e, and the same shape as the enlarged diameter portion 5a and the fitting wall portion 5b of the container body 5 shown in FIG. 6 is formed. At the same time, the bottom and side surfaces of the container body 5 and the shape corresponding to the flange 5c are also formed.

  Thereafter, when the female mold 30 and the male mold 40 are separated from each other, the soft member 43 slides downward with respect to the third hard member 42 and shrinks radially inward to restore the original shape. Thereby, the female mold 30 and the male mold 40 can be separated from each other without any trouble.

  As described above, according to the container forming apparatus of the second embodiment, the container body 5 having substantially the same shape as the container body 5 of the container 4 as shown in FIG. 6 can be manufactured. However, in the case of the second embodiment, in forming the shape such as the fitting wall portion 5b that is reduced in diameter upward, the inner peripheral surface is formed by the reduced diameter portion 43c of the soft member 43 that is a deformed portion, The outer peripheral surface is formed by the reduced diameter portion 30e of the first hard member (female die) 30 which is a deformation receiving portion. In such a case, it is easy to ensure accuracy with respect to the shape of the outer peripheral surface, and therefore, it is suitable for setting parts such as a lid to the container body by external fitting.

  Other configurations, manufacturing procedures, and operational effects are the same as those in the first embodiment, and the description thereof will be omitted. However, according to the second embodiment, the shape of a container that can be manufactured while adopting a simple configuration mold is used. Can increase the degree of freedom.

  FIGS. 15 to 19 show a container forming apparatus according to the third embodiment of the present invention, and FIGS. 20 to 22 show the form of the container 7 manufactured by the container forming apparatus of the third embodiment. Yes.

  As shown in FIGS. 20 to 22, the container 7 is formed integrally with a main body portion 7a and a lid portion 7b with a boundary portion 7c interposed therebetween. The upper opening of the part 7a can be covered. The main body portion 7a and the lid portion 7b are formed by deforming both sides of a single plate-like body 7d into a concave shape, and the boundary portion 7c is bent between the main body portion 7a and the lid portion 7b in the plate-like body 7d. Set as part. In addition, at the four corners of the plate-like body 7d where the main body portion 7a and the lid portion 7b are not formed, a stopper concave portion 7e and a stopper convex portion 7f that are paired with each other are formed in a total of two compositions.

  The pair of stopper recesses 7e and the stopper projections 7f are provided at symmetrical positions with respect to the boundary portion 7c. In the example shown here, two stopper recesses 7e are provided on the body 7a side, and two stopper recesses 7e are provided on the lid 7b side. Stopper convex portions 7f are respectively formed. The stopper recess 7e is formed so as to be recessed toward the back with respect to the paper surface of FIG. 20, and the stopper protrusion 7f is formed so as to protrude toward the front side. That is, when the container 7 is bent at the boundary portion 7c, both the stopper recess 7e and the stopper projection 7f are convex downward (back side with respect to the paper surface). The container 7 is kept bent by inserting the stopper projection 7f into the stopper recess 7e, and can be fixed so that the lid 7b is not separated from the main body 7a.

  As shown in FIGS. 21 and 22, the stopper recess 7 e has a shape whose diameter is reduced toward the top (opening). Moreover, the stopper convex part 7f is equipped with the shape which a diameter shrinks toward the bottom (base part). By doing so, when the stopper convex portion 7f is inserted into the stopper concave portion 7e, the side surfaces of the stopper convex portions 7f are prevented from coming off, and the state where the container 7 is bent can be kept stronger.

  If the stopper concave portion 7e and the stopper convex portion 7f are to be formed by press molding, an interengagement state is generated between the molds. The stopper concave portion 7e and the stopper convex portion 7f having such shapes are provided. The container 7 can be formed by a container forming apparatus shown in FIGS.

  The female mold 50 constituting the container forming apparatus of the third embodiment is configured to include a first hard member 51 and first and second soft members 52 and 53. The male mold 60 is configured as a second hard member.

  The first hard member 51 constituting the female die 50 includes cavities 51a and 51b corresponding to the main body portion 7a and the lid portion 7b of the container 7 as well as gaps 51c and 51d for disposing the soft members 52 and 53, respectively. ing. The soft members 52 and 53 are arranged so as to be embedded in the gaps 51c and 51d, respectively.

  The 1st soft member 52 is a member which shape | molds the outer surface which hits the lower side of the stopper recessed part 7e in the state which opened the container 7 (state which is not bent by the boundary part 7c). As shown in FIG. 16, the first soft member 52 is embedded in the gap 51 c such that the upper surface 52 a protrudes slightly upward from the upper surface of the female mold 50. A cylindrical hole 52 b is formed at the center of the first soft member 52. The diameter of the hole 52b is the same at each height. In addition, a slope 52c is formed on the upper surface 52a of the first soft member 52. The slope 52c forms a downward slope from the peripheral edge of the hole 52b toward the radially outer side.

  The second soft member 53 is a member that molds an inner surface corresponding to the lower side of the stopper convex portion 7f in a state where the container 7 is opened (a state where the container 7 is not bent at the boundary portion 7c). As shown in FIG. 17, the upper surface 53 a of the second soft member 53 is formed with a substantially cylindrical protrusion 53 b at the center, and the second soft member 53 has an upper surface of the female die 50. It is embedded in the gap 51d so as to protrude upward from the bottom. The diameter of the protrusion 53b is the same at each height, but the upper surface 53c of the protrusion 53b is formed with a slope 53d whose center is slightly recessed in a conical shape.

  The male mold 60, which is the second hard member, has convex portions 60b, 60c corresponding to the cavities 51a, 51b of the female mold 50 on the lower surface 60a, as well as the holes 52b and the protrusions 53b of the soft members 52, 53, respectively. Each has a corresponding stopper forming convex portion 60d and a stopper forming concave portion 60e.

  As shown in FIG. 16, the stopper forming convex portion 60 d is a protruding portion having a shape corresponding to the hole 52 b of the first soft member 52, but has a shape whose diameter is reduced upward, As it goes to the base side (up), it has a truncated cone shape with a smaller diameter.

  The stopper forming recess 60e is a hole having a shape corresponding to the protrusion 53b of the second soft member 53, as shown in FIG. It has a frustoconical shape with a smaller diameter toward the side. The bottom 60f of the stopper forming recess 6e is provided with a conical shape (slope 60g) with the apex facing the opening (downward).

  At the time of press molding, the hole 52b of the first soft member 52 and the protrusion 53b of the second soft member 53 each function as a deformed portion. Further, the stopper forming convex portion 60d of the male mold 60 functions as a deformation receiving portion for the hole 52b which is a deforming portion, and the stopper forming concave portion 60e functions as a deformation receiving portion for the protrusion 53b which is a deforming portion. In the case of the third embodiment, the protrusion 53b of the second soft member 53 provided in the female die 50 is inserted into the stopper forming recess 60e provided in the male die 60, and the protrusion 53b and the stopper forming recess 60e are Since the stopper projection 7f is formed between the female mold 50 and the projection 53b, the male mold 50 functions as a male mold, and the male mold 60 functions as a female mold at the stopper forming recess 60e.

  In the press molding process, when the female mold 50 and the male mold 60 approach each other with the resin sheet S (see FIG. 18 and FIG. 19) between them, the convex portions 60 b and 60 c of the male mold 60 are formed. The cavity 51a, 51b provided in the first hard member 51 of the female die 50 enters, and the stopper forming convex portion 60d enters the hole 52b of the first soft member 52, and the second soft member enters the stopper forming concave portion 60e. The protrusion 53b of the member 53 enters. By heating and pressurizing between the female mold 50 and the male mold 60, the resin sheet S is deformed in accordance with the shape of the gap formed between the female mold 50 and the male mold 60. Further, when the molds are brought closer to each other, the lower surface 60a of the male mold 60 comes into contact with the upper surface 52a of the first soft member 52 with the resin sheet S interposed therebetween. Further, the bottom 60 f of the stopper forming recess 60 e provided on the lower surface 60 a of the male mold 60 contacts the upper surface 53 c of the protrusion 53 b provided on the second soft member 53 with the resin sheet S interposed therebetween.

  When the female mold 50 and the male mold 60 are pressed against each other, the first soft member 52 receives a downward force from the lower surface 60a of the male mold 60 at the upper surface 52a protruding from the upper surface of the first hard member 51 (FIG. 18). reference). At this time, the direction of the force is changed by the inclined surface 52c provided on the upper surface 52a, and the material constituting the hole 52b is deformed so as to be reduced inward in the radial direction. That is, the inclined surface 52c provided on the upper surface 52a of the first soft member 52 functions as the force receiving portion, and the lower surface 60a of the male mold 60 facing the inclined surface 52c functions as the applying force portion. At the same time, the inner wall of the gap 51c of the first hard member 51 functions as a contact portion. As a result, the hole 52b is deformed so as to become smaller as the diameter of the inner peripheral surface increases.

  On the other hand, the stopper forming convex portion 60d of the male mold 60, which is the second hard member, has a shape whose diameter is reduced toward the top (base side) as described above. Accordingly, an interengagement state is formed between the hole 52b and the stopper forming convex portion 60d, and the stopper concave portion 7e is formed so as to be reduced in diameter toward the gap between the hole 52b and the stopper forming convex portion 60d (see FIG. 21). ) Is formed.

  In the second soft member 53, the upper surface 53c of the projection 53b is pushed downward from the bottom 60f of the stopper forming recess 60e of the first hard member 51 (see FIG. 19). The bottom portion 60f of the stopper forming recess 60e contacts the upper surface 53c of the protrusion 53b at the inclined surfaces 60g and 53d. That is, the inclined surface 60g provided on the bottom 60f of the stopper forming recess 60e functions as a force applying portion, and the inclined surface 53d provided on the upper surface 53c of the projection 53b functions as a force receiving portion. The downward force is converted outward in the radial direction on the conical slopes 60g and 53d, and the protrusion 53b is deformed so that the diameter increases toward the upper side in the form of increasing in diameter. At the same time, the inner wall of the gap 51d of the first hard member 51 functions as a butt portion.

  On the other hand, the stopper forming recess 60e of the male mold 60, which is the second hard member, has a shape whose diameter is reduced downward (opening side) as described above. Accordingly, an interengagement state is formed between the protrusion 53b and the stopper forming recess 60e, and the stopper protrusion 7f having a shape whose diameter is reduced downward into the gap between the protrusion 53b and the stopper forming recess 60e (see FIG. 22). Is formed.

  At the same time, the main body portion 7a and the lid portion 7b of the container 7 are formed between the cavities 51a and 51b of the female die 50 and the convex portions 60b and 60c of the male die 60.

  Thereafter, the female mold 50 and the male mold 60 are separated from each other. When the force applied downward from the male mold 60 is lost, the shapes of the holes 52b and the protrusions 53b of the soft members 52 and 53 are restored, the mutual engagement state is released, and the female mold 50 and the male mold 60 are separated without any trouble.

  In the container 7 shown here, the stopper concave portion 7e is disposed on the main body portion 7a side, and the stopper convex portion 7f is disposed on the lid portion 7b side by two, but the stopper concave portion 7e and the stopper convex portion 7f The number, arrangement, and combination are not limited to this. The number of sets of the stopper recesses 7e and the stopper projections 7f may be larger or smaller than this, and the stopper projections 7f may be disposed on the main body 7a side and the stopper recesses 7e may be disposed on the lid 7b side. good. The stopper concave portion 7e and the stopper convex portion 7f may be mixed on the main body portion 7a side and the lid portion 7b side.

  In forming the structure for forming the stopper recess 7e and the stopper protrusion 7f in the container 7 (the hole 52b and the protrusion 53b, the stopper formation protrusion 60d and the stopper formation recess 60e) in the female mold 50 and the male mold 60, In the example shown here, the hole 52b and the protrusion 53b are formed by the soft members 52 and 53. However, regarding these structures, the combination of the soft member and the hard member is not limited to this. For example, contrary to the example shown here, the shape corresponding to the hole 52b and the protrusion 53b can be formed by a hard member, and the shape corresponding to the stopper forming convex portion 60d and the stopper forming concave portion 60e can be formed by a soft member. However, in the engagement between the stopper concave portion 7e and the stopper convex portion 7f formed in the container 7, the accuracy of the inner surface of the stopper concave portion 7e and the outer surface of the stopper convex portion 7f is important, and particularly high accuracy is required. 16 to 19, it is more preferable to form the stopper forming convex portion 60d for shaping the inner surface of the stopper concave portion 7e and the stopper forming concave portion 60e with a hard member.

  As described above, in the container forming apparatus of the third embodiment, the soft member 53 has the protrusion 53b having an axis along the pressing direction, and the protrusion 53b expands with respect to the force applied in the pressing direction. It is configured.

  Further, in the container forming apparatus of the third embodiment, the soft member 52 has a hole 52b having an axis along the pressing direction, and the hole 52b is configured to be reduced in diameter with respect to a force applied in the pressing direction. Yes. Even if it does in this way, the shape which is diameter-reduced toward the opening part side can be easily shape | molded in the container 7. FIG.

  Other configurations, manufacturing procedures, and operational effects are the same as those in the first and second embodiments, and the description is omitted. However, the third embodiment can be manufactured while adopting a simple configuration mold. The degree of freedom of the shape of the container can be increased.

  FIG. 23 to FIG. 27 show the form of a container forming apparatus according to the fourth embodiment of the present invention, and each step of forming. In the case of the fourth embodiment, unlike the first to third embodiments, a thin shape is formed along the pressing direction, not undercut forming by forming an interengagement state between the molds. The purpose is to do.

  In the fourth embodiment, a third die 90 for forming a thin shape is used in addition to the first die 70 that is a female die and the second die 80 that is a male die.

  The first mold 70 is a female mold having a cavity 70 a and is formed by a hard member 71 and a soft member 72. The hard member 71 has a bowl-like cylindrical shape as a whole, the upper surface of the bottom 71a is covered with the soft member 72, and the inner peripheral surface of the side wall 71b is exposed to the cavity 70a. That is, the cavity 70 a of the first mold 70 is formed with the hard member 71 on the side surface and the soft member 72 on the bottom surface.

  The soft member 72 that forms the bottom surface of the cavity 70a is formed with a slit 72a as a plugged portion at a position slightly inside in the radial direction from the outer periphery. The upper end of the slit 72a is open to the upper surface 72b of the soft member 72, and forms a cylindrical surface in the soft member 72 along the vertical direction. The slit 72a has a circular shape carved on the bottom surface of the cavity 70a in plan view.

  The second mold 80 is a male mold having a convex portion 80a corresponding to 70a in the cavity, and is formed of a hard member.

  The third mold 90 includes a base portion 91 and a movable portion 92 that is movable with respect to the base portion 91. A support column 91a is erected on the upper surface of the cylindrical base 91 along the vertical direction, and the movable unit 92 can move up and down along the support column 91a.

  The movable portion 92 has a substantially cylindrical shape as a whole, and includes a main body portion 92a supported by the support column 91a above the base portion 91, and an insertion molding portion 92b provided below the outer edge portion of the main body portion 92a. Yes. The cylindrical insertion molding portion 92b has a lower end extending downward from the main body portion 92a. When the main body portion 92a descends with respect to the base portion 91, the insertion molding portion 92b is lower than the lower surface of the base portion 91. It protrudes downward. The diameter of the lower end portion of the insertion molding portion 92 b that forms a cylindrical surface matches the diameter of the slit 72 a exposed in the cavity 70 a of the first die 70. In the third mold 90, at least the lower end portion of the insertion molding portion 92b is formed as a hard member (second hard member).

  The press forming process using the molds 70, 80, 90 will be described with reference to the flowchart of FIG.

  First, as shown in FIG. 23, the convex portion 80a of the second die 80 is inserted into the cavity 70a of the first die 70 and heated and pressurized, and the resin as the material is formed between the cavity 70a and the convex portion 80a. The sheet S is formed into a deep dish mold (step S11). The second mold 80 is removed, and the third mold 90 is placed in the cavity 70a so that the upper surface 72b of the soft member 72 of the first mold 70 is in contact with the lower surface of the base portion 91 through the resin sheet S as shown in FIG. (Step S12). At this time, the position of the insertion molding part 92b is made to coincide with the position of the slit 72a provided in the soft member 72 in plan view.

  Then, as shown in FIG. 25, when the movable portion 92 is moved downward in the pressing direction with respect to the base portion 91, the insertion molding portion 92b enters the slit 72a provided in the soft member 72 (step S13). ). The material of the soft member 72 is deformed so as to be pushed away in the radial direction which is a deformation direction different from the press direction. Of the material of the soft member 72 that faces the slit 72a and faces the insertion molding portion 92b, the portion located on the radially outer side of the insertion molding portion 92b has a radially outward direction as a deformation direction when approaching, and is radially inward. The portions located in the shape are deformed with the radially inward direction being the deformation direction at the time of approach.

  At this time, the material of the resin sheet S that was positioned above the slit 72a at the time of step S12 (see FIG. 24) is stretched downward by the tip of the insertion molding portion 92b, and the slit 72a together with the insertion molding portion 92b. Enter inside. That is, both surfaces of the insertion molding part 92b are covered with the resin sheet S, and the soft member 72 is positioned so as to sandwich it.

  Thereafter, when the movable portion 92 is moved upward, as shown in FIG. 26, the insertion molding portion 92b is pulled out from the slit 72a while the resin sheet S remains in the slit 72a (step S14). The material of the soft member 72 that has been pushed away by the insertion molding portion 92b tends to be restored to the direction in which the slit 72a is closed by the repulsive force while the insertion molding portion 92b is pulled out. That is, of the material of the soft member 72 facing the slit 72a, the portion located radially outward is the radially inward deformation direction during separation, and the portion located radially inside is radially outwardly deformed during separation. Each direction is deformed. As a result, the resin sheet S that has entered the slit 72a with the insertion molding portion 92b interposed therebetween is pressed against each other in the direction (radial direction) perpendicular to the surface formed by the slit 72a and closed to form the shape of the slit 72a. Is formed into a cylindrical surface along the shape.

  When the resin sheet S is released from the first mold 70 (step S15), as shown in FIG. 27, a thin leg portion 8b having a short cylindrical surface is provided on the bottom surface of the deep plate body 8a. A container 8 is obtained.

  In the container 8, a thin member (leg part 8b) protrudes from the surface of the main body part 8a, and a T-shaped cross section is formed in this part. In normal press molding, a container having such a shape is manufactured. It is difficult. The shape having a T-shaped cross section is a shape in which the edge of the second surface is abutted against the first surface, but in the press molding using a normal male mold and a female mold, Although the first surface can be molded between the mold and the female mold, the second surface cannot be molded at the same time. Even if, for example, a groove having a shape corresponding to the second surface is formed in the female mold, in the case of press molding, the material does not enter the narrow groove well. This is especially true for materials with low fluidity, such as foamed resins.

  Therefore, in the fourth embodiment, the material (resin sheet) S of the main body portion 8a corresponding to the first surface is pushed into the slit 72a by the thin insertion molding portion 92b, so that the slit 72a, which is a narrow gap, is formed. Also, the material S is inserted into. Here, since the slit 72a is provided in the soft member 72, if the insertion molding part 92b is pushed into the slit 72a together with the material S and then the insertion molding part 92b is pulled out, the resin sheet S remaining in the slit 72a is Are closed by the repulsive force of the slit 72a. Therefore, the portion corresponding to the leg portion 8b is temporarily hollowed by the insertion molding portion 92b during molding, but is finally molded as a single plate-like member. In this manner, the container 8 having a T-shaped cross section having a thin shape protruding from one surface of the main body portion 8a can be formed like the leg portion 8b.

  In the case of the fourth embodiment, the insertion molding portion 92b functions as a force applying portion and temporarily functions as a deformation receiving portion. Moreover, the slit 72a which is a to-be-inserted part is a force receiving part, and functions as a deformation | transformation part. Further, in the first hard member 71, the bottom 71a and the side wall 71b corresponding to the outer periphery of the soft member 72 correspond to the abutting portion. Furthermore, it can be said that the central portion in the radial direction of the soft member 72 also functions as a contact portion.

  In the case of the fourth embodiment, the first press direction (the press direction between the first and second dies 70 and 80) and the second press direction (the first and third dies 70 and 90 to each other). In other words, when pressing is performed a plurality of times as described above, the pressing directions of the pressing steps do not necessarily match, and the first press The direction and the second pressing direction may be different. For example, when making a shape that protrudes from the side surface of the main body 8a, press molding is performed in different directions from the first time and the second time.

  As described above, the container molding apparatus according to the fourth embodiment includes the insertion molding portion 92b that is inserted in the pressing direction with respect to the insertion portion 72a of the soft member 72 as the hard member.

  In the container molding apparatus of the fourth embodiment, the insertion molding part 92b has a shape extending along the pressing direction, the insertion part 72a is a slit formed in the soft member 72, and the material of the container 8 is used. After inserting S into the slit 72a together with the insertion molding part 92b, the insertion molding part 92b can be extracted from the slit 72a, and the material S of the container 8 can be molded by the slit 72a.

  And in the manufacturing method of the container of the fourth embodiment, as the hard member, the insertion part 92b inserted in the pressing direction with respect to the insertion part 72a of the soft member 72 is provided, and the material S of the container is inserted. After being inserted into the insertion portion 72a together with the insertion molding portion 92b, the insertion molding portion 92b is extracted from the insertion portion 72a, and the material S of the container 8 is molded by the insertion portion 72a. By doing so, for example, a shape in which a thin member (leg portion 8b) protrudes from the surface can be formed by press molding.

  Other configurations, manufacturing procedures, and operational effects are the same as those in the first to third embodiments, and thus the description thereof is omitted. However, the fourth embodiment can be manufactured while adopting a simple configuration mold. The degree of freedom of the shape of the container can be increased.

  The container forming apparatus and the manufacturing method of the present invention are not limited to the above-described embodiments, and it is needless to say that various changes can be made without departing from the gist of the present invention.

4 container 7 container 8 container 10 type (female type)
11 Hard member (first hard member)
11f Engaging convex part (butting part)
11g Butting part 12 Hard member (second hard member)
12c Slope (forced part)
13 Soft member 13d Slope (power receiving part)
13e Deformation part 20 type (male type, third hard member)
30 type (female type, first hard member)
40 type (male type)
41 Hard member (second hard member)
41a Upper surface (butting part)
42 Hard member (third hard member)
42c Slope (forced part)
43 Soft member (deformed part)
43a Slope (power receiving part)
50 type (female type)
51 Hard member (first hard member)
51c gap (butting part)
51d gap (butting part)
52 Soft member (first soft member)
52b Hole (deformation part)
52c Slope (power receiving part)
53 Soft member (second soft member)
53b Protrusion (deformed part)
53d Slope (power receiving part)
Type 60 (male type, second hard member)
60a Bottom surface (forced part)
60g slope (forced part)
70 type (female type, first type)
71 Hard member (first hard member)
71a Bottom part (butting part)
71b Side wall (butting part)
72 Soft member (butting part)
72a slit (inserted part, deformed part, force receiving part)
80 type (male type, second type)
90 type (third type)
92b Insertion molding part (second hard member, deformation receiving part, force application part)
S material

Claims (14)

  A container forming apparatus including a mold constituted by a hard member and a soft member.   The force-applying portion of the hard member applies force in the pressing direction to the force-receiving portion of the soft member, and the deforming portion of the soft member is configured to deform in a deforming direction different from the pressing direction. Item 2. A container forming apparatus according to Item 1.   The container forming apparatus according to claim 2, further comprising an abutting portion that restrains the soft member on an opposite side of the force applying portion with the force receiving portion of the soft member interposed therebetween.   The container forming apparatus according to claim 2 or 3, wherein at least one of the force applying portion and the force receiving portion is provided with an inclined surface to define a deformation direction of the deformation portion.   The container forming apparatus according to any one of claims 2 to 4, wherein the flexible member is deformed to temporarily form an interengaged state between the molds.   The container according to any one of claims 2 to 5, wherein the soft member has a ring shape having a central axis along a pressing direction, and is configured to be deformed in a radial direction with respect to a force applied in the pressing direction. Molding equipment.   The container according to any one of claims 2 to 5, wherein the soft member has a protrusion having an axis along a pressing direction, and the protrusion is configured to expand in diameter with respect to a force applied in the pressing direction. Molding equipment.   The container according to any one of claims 2 to 5, wherein the soft member has a hole having an axis along a pressing direction, and the hole is configured to reduce a diameter with respect to a force applied in the pressing direction. Molding equipment.   The container molding apparatus according to claim 2 or 3, further comprising an insertion molding portion that is inserted in the press direction with respect to the insertion portion of the soft member as the hard member. The insertion molding part has a shape extending along the pressing direction,
The inserted portion is a slit formed in the soft member,
The container according to claim 9, wherein the container material is configured to be inserted into the slit together with the insertion molding part, and then the insertion molding part is extracted from the slit and the container material is molded by the slit. Molding equipment. Using a mold composed of hard and soft members,
A method for manufacturing a container, wherein the material of the container is molded while the soft member is deformed.   The deformed portion of the soft member is deformed in a deformation direction different from the press direction by a force applied in the press direction from the force applied portion of the hard member to the force receiving portion of the soft member. Container manufacturing method.   The method for manufacturing a container according to claim 11 or 12, wherein an interengagement state is temporarily formed between the molds by deforming the deforming portion during pressing. As the hard member, provided with an insertion molding part to be inserted in the press direction with respect to the insertion part of the soft member,
12. After inserting the material of a container into the said insertion part with the said insertion molding part, the said insertion molding part is extracted from the said insertion part, and the raw material of a container is shape | molded by the said insertion part. Or the manufacturing method of the container of 12.

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