JP2009297743A - Forming apparatus and forming method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forming apparatus and a forming method by which impact to a body to be formed at forming is mitigated without using a lubricant. <P>SOLUTION: The forming apparatus 1 is principally composed of a first die member 10 and a second die member 30 which is situated in the upper part of the first die member. The first die member 10 is provided with a cylindrical body 20 and an edge part 15 and a first stepped groove 11 and a second stepped groove 12 are formed on the cylindrical body 20. In the vicinity of the upper end part of the hollow wall surface 17 of the cylindrical body 20, a plurality of openings 2 are provided in the peak parts and the valley parts of the first stepped groove 11 and the second joggled groove 12. The second die member 30 is provided with a conical body 35 and a pestle-shaped pushing rod 31. On the sidewall of the conical body 35, bevel-gear-shaped grooves 39 are formed in accordance with the first stepped grooves 11 and also, on the sidewall of the pestle-shaped pushing rod 31, gear-shaped grooves 33 are formed in accordance with the second stepped grooves 12. The body to be formed which is set between the first die member 10 and the second die member 30 is pressed in the state where air is jetted from the openings 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a molding apparatus and a molding method, and more particularly to a molding apparatus and a molding method for press-molding a sheet-shaped object.

  As a press molding material for food packaging containers, a metal foil such as aluminum, a resin sheet such as polypropylene, a paper sheet, and a laminate of these are used. Further, in order to enable mass production at low cost, generally, a laminated sheet in which a plurality of these sheets are stacked is press-molded. In order to prevent problems such as tearing and cracking of the laminated sheet due to press forming, a lubricant is applied to the surface of the laminated sheet to provide slipperiness and to reduce the impact of compression and tension due to press forming on the sheet. (For example, Patent Document 1).

  However, the use of lubricants as additives in food packaging containers has tended to be repelled by consumers, and various press molding methods that do not use lubricants have been proposed. Among these, the press molding method using a lubricating auxiliary material is demonstrated below.

  FIG. 15 is an external perspective view of a laminated aluminum foil container obtained by press-molding laminated aluminum foil sheets.

  Referring to the figure, laminated aluminum foil container 45 is in a state in which a plurality of aluminum foil containers 60 each having a bottom part and a side wall part with a flange part are directly overlapped. And in use, it is used as one aluminum foil container 60 while being peeled off one by one.

  FIG. 16 is an exploded perspective view showing a schematic structure of a forming apparatus for forming an aluminum foil container disclosed in Patent Document 2.

  Referring to the drawing, the molding apparatus includes a first mold member 10, a second mold member 30 facing the first mold member 10 via a laminated aluminum foil sheet (not shown) that is a molded body, It is composed of

  The first mold member 10 has a cylindrical shape, the upper wall thereof is inclined in the inner direction, and a first step groove 74 that extends radially from the central axis is formed on the surface thereof. A second step groove 75 is formed in the inner wall 76, and the first step groove 74 and the second step groove 75 are connected to each other.

  On the other hand, the second mold member 30 is composed of a rod-shaped push rod 31 having a cylindrical shape, and a cone 35 in which the rod-shaped push rod 31 can be inserted into and removed from an opening 77 formed at the center thereof. ing. The hook-shaped push rod 31 has a gear-shaped groove formed in the axial direction thereof, and a bevel gear-shaped groove is formed on the side wall of the cone 35. Each of the gear-shaped groove and the bevel gear-shaped groove is provided so as to correspond to the number and position of the convex portions of the first step groove 74 and the second step groove 75.

  FIG. 17 is a view showing a placing step of placing a set of forming unit sheets on the forming apparatus shown in FIG.

Referring to the drawing, a forming unit sheet 70 in which punched partition paper 71 is positioned at the lowermost portion of a plurality of laminated aluminum foil sheets 72 is placed on the first mold member 10 of the forming apparatus. In this state, the second mold member 30 is lowered to form the laminated aluminum foil container shown in FIG. Here, as described above, since the punching partition paper 71 which is a lubricating auxiliary material is located at the lowermost part of the molding unit sheet 70, it plays the role of a cushion against the impact at the time of molding related to the molding unit sheet 70, A plurality of laminated aluminum foil sheets 72 will be protected.
JP 2006-15385 A JP 2001-106221 A

  In the conventional molding apparatus and molding method as described above, the punched partition paper has to be removed from the laminated aluminum foil container after molding, which is troublesome and is not industrially preferable.

  In addition, the surface of the mold member (mold) is polished, plated, or treated with Teflon coating (Teflon is a registered trademark) to reduce the roughness of the mold member surface and improve the slipperiness. However, it has not been sufficient as a molding method that does not use a lubricant.

  The present invention has been made in order to solve the above-described problems, and provides a molding apparatus and a molding method capable of mitigating an impact on a molded body during molding without using a lubricant. With the goal.

  In order to achieve the above object, the invention according to claim 1 is a molding apparatus for press-molding a sheet-like object to be molded, which is based on the first mold member and the first mold member. At least one of the first mold member and the second mold member can be driven so as to press the second mold member disposed so as to oppose the molded body and the molded body. Drive means, and at least one of the press surface of the first mold member and the press surface of the second mold member is provided with an opening, and further includes gas ejection means capable of ejecting gas from the opening. When the compact is pressed, gas is ejected from the opening.

  If comprised in this way, gas will be ejected toward the to-be-molded body from at least one of the press surfaces.

  According to a second aspect of the present invention, in the configuration of the first aspect of the invention, the first mold member has a cylindrical shape extending in the vertical direction, and the upper surface thereof is inclined upward from the inside toward the outside. A first step groove formed radially is formed, and the hollow wall surface includes a cylindrical body in which a second step groove connected to the first step groove is formed in parallel in the vertical direction. The mold member includes a cone having a cylindrical hollow portion extending in the vertical direction and penetrating the center portion in the vertical direction, and a side wall having a bevel gear groove corresponding to the first step groove, and a cone It has a cylindrical shape with its lower surface aligned with the lower surface of the body, with the lower part tapered, and has a horizontal cross section that slidably engages the hollow part and can be inserted into the hollow wall surface. The side wall includes a hook-shaped push rod in which a gear-shaped groove corresponding to the second step groove is formed in the vertical direction. The driving means drives the cone downward, and further drives the saddle-shaped push rod downward, and the openings are the first step groove and the second step near the upper end of the hollow wall surface of the cylindrical body. A plurality of grooves are formed in a predetermined range of the groove.

  If comprised in this way, gas will jet out to the location where a to-be-molded body deform | transforms large at the time of a press.

  According to a third aspect of the present invention, in the configuration of the second aspect of the present invention, each of the openings is formed to have substantially the same size and is arranged substantially uniformly.

  If comprised in this way, gas will be ejected uniformly.

  According to a fourth aspect of the present invention, in the configuration of the second or third aspect of the present invention, the opening is formed in the crest portion and the trough portion of each of the first step groove and the second step groove. is there.

  If comprised in this way, gas will jet out to the location where force concentrates at the time of the to-be-molded body press.

  According to a fifth aspect of the present invention, in the configuration of the second aspect of the present invention, each of the openings has an opening area corresponding to a circle having a diameter of 0.05 to 1.00 mm. It is.

  If comprised in this way, the possibility that a to-be-molded body will be caught in opening will be reduced while the ejection of gas is stabilized.

According to a sixth aspect of the present invention, in the configuration of the ^{second aspect} of the present invention, the projection density of each opening in a plan view is 50 to 300 / cm ² .

  If comprised in this way, the ejection density of gas will become uniform.

  According to a seventh aspect of the invention, in the configuration of the invention according to any one of the second to sixth aspects, the specific portion of the cylindrical body is formed by processing a die by a thin plate lamination method, and each of the openings is specified. It is formed in the part.

  With this configuration, the opening is formed by a thin plate lamination method.

  The invention according to claim 8 is a forming method for press-molding a sheet-like object to be formed, and the step of disposing the object between the first mold member and the second mold member facing each other. The first mold member and the second mold member are brought close to each other to press the molded body, and the space between the molded body and the press surface of the first mold member and the molded body and the second And a step of jetting gas into at least one of the spaces between the pressing surfaces of the mold members.

  If comprised in this way, gas will be ejected between at least one of a press surface, and a to-be-molded body.

  The invention according to claim 9 is a molding method for press-molding a laminated disk-sheet-shaped object, and has a cylindrical shape extending in the vertical direction, and its upper surface is directed from the inside to the outside. A step of placing the object to be molded on the upper surface of the first mold member that is inclined upward, and a cylindrical hollow part that is disposed above the object to be molded and extends in the vertical direction and penetrates the center part vertically. A step of lowering a cone formed with a pressing member to be pressed, and a hook-shaped push rod having a horizontal cross section which is slidably engaged with the hollow portion and can be inserted into the hollow wall surface. A step of pushing the central portion of the molded body into the hollow portion of the cylindrical body and simultaneously ejecting gas from at least a part of the upper surface of the first mold member toward the molded body and ejecting gas from the upper portion of the hollow portion. It is equipped with.

  If comprised in this way, gas will jet out to the location where a to-be-molded body deform | transforms large at the time of a press.

  As described above, in the first aspect of the invention, since the gas is ejected from at least one of the press surfaces toward the object to be molded, the ejected gas exhibits a buffering effect during pressing.

  In addition to the effect of the invention of the first aspect, the invention according to the second aspect exhibits an efficient buffering effect because the gas is ejected to a location where the molded body is largely deformed during pressing.

  In addition to the effect of the invention of the second aspect, the invention of the third aspect exhibits a stable buffering effect because the gas is uniformly ejected.

  In addition to the effects of the invention described in claim 2 or claim 3, the invention described in claim 4 jets gas to a location where the force is concentrated when the molded body is pressed. Is more reduced.

  In addition to the effects of the invention according to any one of claims 2 to 4, the invention according to claim 5 is reliable because the gas ejection is stabilized and the possibility of the molded object being caught in the opening is reduced. Will improve.

  In addition to the effect of the invention according to any one of claims 2 to 4, the invention described in claim 6 has a uniform gas ejection density, so that the buffering effect is stabilized and the processing accuracy is higher than necessary. Must not.

  According to the seventh aspect of the invention, in addition to the effect of the invention according to any one of the second to sixth aspects, since the opening is formed by a thin plate lamination method, the accuracy of the opening is improved, which is advantageous in cost. It becomes a simple mold member.

  In the invention according to claim 8, since the gas is ejected between at least one of the press surfaces and the molding target, the ejected gas exhibits a buffering effect.

  The invention according to claim 9 exhibits an efficient buffering effect because the gas is ejected to a location where the molding is greatly deformed during pressing.

  FIG. 1 is an exploded perspective view showing a schematic structure of a molding apparatus according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II shown in FIG.

  Referring to these drawings, the forming apparatus 1 press-forms a laminated aluminum foil container as shown in FIG. 15, and is positioned above the first mold member 10 and the first mold member 10. The second mold member 30 is mainly configured.

  The first mold member 10 has a cylindrical shape extending in the vertical direction, and the upper surface of the first mold member 10 is inclined upward from the inner side to the outer side, the upper part of the cylindrical body 20, and the entire outer edge thereof. And a ring-shaped edge 15 formed. A first step groove 11 is formed radially on the upper surface of the cylindrical body 20 from the inside to the outside, and a hollow wall surface 17 of the cylindrical body 20 is connected to the first step groove 11. Two step grooves 12 are formed parallel to the vertical direction.

  Further, in the vicinity of the upper end portion of the hollow wall surface 17 of the cylindrical body 20, the first step groove 11 and the second step groove 12 have substantially the same size, and the peak portion and valley portion of the predetermined range of the first step groove 11 and the second step groove 12. A plurality of openings 2 are provided. This opening 2 is for ejecting air from a gas ejection means (not shown). The detailed structure and effect of the opening 2 will be described later.

  The second mold member 30 has a conical body 35 formed with a cylindrical hollow portion 41 extending in the vertical direction and penetrating vertically through the center portion, and the lower surface position of the second mold member 30 is aligned with the lower surface position of the conical body 35. And a rod-shaped push bar 31 having a cylindrical shape such that the portion 37 is tapered. A bevel gear-shaped groove 39 corresponding to the first step groove 11 is formed on the side wall of the cone 35, and a gear corresponding to the second step groove 12 is formed on the side wall of the hook-shaped push rod 31. A groove 33 is formed. The hook-shaped push bar 31 has a horizontal cross section that is slidably engaged with the hollow portion 41 in the vertical direction and that can be inserted through the hollow wall surface 17.

  At the time of molding, the object to be molded is first placed on the upper surface of the first mold member. Next, after the conical body 35 and the hook-shaped push bar 31 as the second mold member 30 are driven downward by a driving means (not shown), the hook-like push bar 31 is further driven downward, and at the same time, a plurality of openings are opened. Air is spouted from 2. Details of such a molding method will be described later.

  Here, the detailed internal structure of the 1st type | mold member 10 regarding the opening 2 which performs the ejection of the air in the shaping | molding apparatus 1 by this embodiment is demonstrated.

  3 is an enlarged view of a portion X shown in FIG. 2, FIG. 4 is a sectional view taken along line IV-IV shown in FIG. 3, and FIG. 5 is an enlarged sectional view taken along line V-V shown in FIG. It is.

  Referring to these drawings, the openings 2a to 2n are provided in the vertical direction and substantially uniformly along the hollow wall surface 17 of the cylindrical body 20, and at the peak portions of the first step groove and the second step groove. Is provided. Each of the openings 2a to 2n extends radially outward and horizontally, has a circular shape in plan view, and is connected to an air supply hole 25a extending in the vertical direction. The dotted line portions shown in FIG. 4 are openings provided in the valley portions of the first step groove and the second step groove, and have substantially the same shape as the openings 2a to 2n described above, and the openings 2a to 2n. Are provided alternately in the vertical direction with the phase shifted in the circumferential direction, and connected to a similar air supply hole 25b adjacent to the air supply hole 25a. These openings are similarly provided in all of the crests and troughs of the first step groove and the second step groove in the vicinity of the upper end portion of the hollow wall surface 17 of the cylindrical body 20.

  The air supply holes 25 a and 25 b extend in the vertical direction as shown in FIG. 3, and a plurality of air supply holes 25 a and 25 b are provided so as to surround the hollow wall surface 17, and each lower end is connected to the circular groove 22. Therefore, the circular groove 22 has a ring shape that surrounds the hollow wall surface 17 of the cylindrical body 20, thereby connecting to the plurality of air supply holes 25 a and 25 b formed in the cylindrical body 20. The circular groove 22 has a circular shape in a plan view and is connected to an air hole 24 extending downward. And the air hole 24 is comprised so that it may connect with the gas ejection means which is not shown in figure.

  Since the inside of the cylindrical body 20 is configured as described above, the air ejected from the gas ejection means reaches the circular groove 22 through the air hole 24. Next, the air that has reached the circular groove 22 passes through the plurality of air supply holes 25a and 25b, passes through the plurality of openings 2 connected thereto, and can eject the air. As described above, the first mold member 10 has a complicated internal structure, but in order to form such a complicated internal structure, for example, manufacturing by a thin plate lamination method is effective. A method for manufacturing the first mold member 10 by the thin plate lamination method will be described later.

  Next, a forming method for forming the laminated aluminum foil container shown in FIG. 15 by the forming apparatus 1 according to this embodiment will be described.

  FIG. 6 is a schematic process diagram showing a molding method for molding a laminated aluminum foil container by the molding apparatus shown in FIG.

  First, referring to (1), a molding unit sheet 50 as a molding target is placed on the upper surface of the first mold member 10. The molding unit sheet 50 is substantially the same as the conventional molding unit sheet shown in FIG. 17, but is greatly different in that no punching partition paper as a lubricating auxiliary material is provided at the lowermost part thereof. At this time, the cone 35 which is the second mold member 30 and the hook-shaped push bar 31 are located on the upper part of the forming unit sheet 50.

  Further, when the molding unit sheet 50 is placed as described above, the molding unit sheet 50 is surrounded by the edge 15 so that there is no possibility that the molding unit sheet 50 moves in the horizontal direction. The state is stable.

  Next, referring to (2), the mold member 30 is driven downward by a driving means (not shown). Then, the outer portion of the molded unit sheet 50 is pressed by the bevel gear-shaped groove 37 of the cone 35 and the first step groove 11 of the first mold member 10, and the molded unit sheet 50 is deformed.

  In such a state, air is ejected from the plurality of openings 2 described above. Therefore, since air is ejected between the forming unit sheet 50 and the first step groove 11, a buffering effect is exerted against deformation and force caused by press forming.

  Next, referring to (3), only the hook-shaped push bar 31 is further driven downward by the driving means. Then, the forming unit sheet 50 is pressed by the hook-shaped push bar 31 along the hollow wall surface of the cylindrical body 20 by the gear-shaped groove 33 of the hook-shaped push bar 31 and the second step groove 12 of the first mold member 10. Move to be pushed down. At this time, the portion where the lower surface of the bowl-shaped push rod 31 and the forming unit sheet 50 are in contact corresponds to the bottom surface of the laminated aluminum foil container, and the second step groove 12 and the gear-shaped groove 33 are pressed, A bowl-shaped side wall of the laminated aluminum foil container is formed.

  Furthermore, since the lower part 37 of the hook-shaped push rod has a tapered shape as described above, the side wall of the molded laminated aluminum foil container is inclined upward outward, so that the shape is stable and the molding unit The force with which the sheet 50 is pressed is relaxed.

  In (3), the force for deformation and pressing applied to the forming unit sheet 50 is the largest. Accordingly, the air is set to be ejected from the plurality of openings 2 as in (2). Since the opening 2 is provided in the vicinity of the upper end of the hollow wall surface of the cylindrical body 20, air is ejected at a location where the change applied to the molding unit sheet 50 is the largest. Therefore, the buffer effect is exhibited efficiently.

  Further, regarding the air ejection in (2) and (3), the plurality of openings 2 have substantially the same size and are arranged substantially uniformly, so that the gas is uniformly ejected to the forming unit sheet 50. Is done. Therefore, a stable buffer effect is exhibited.

  Further, the plurality of openings 2 are provided in the crest and trough portions of the first step groove 11 and the second step groove 12. These crests and troughs are places where the force concentrates when the forming unit sheet 50 is pressed. Therefore, the possibility of damage due to press molding of the molded unit sheet 50 is further reduced by ejecting gas from such a location.

  Next, referring to (4), the molding unit sheet 50 is further moved downward by driving the upper push bar 31 further downward by the driving means. At this time, the pressing to the forming unit sheet 50 by the gear-shaped groove 33 of the hook-shaped push rod 31 and the second step groove 12 of the first mold member 10 is performed following (3). No eruption has occurred. This is because the deformation applied to the forming unit sheet 50 in (2) and (3) has been completed, and there is a low possibility that the forming unit sheet 50 will be damaged without blowing air. That is, for the purpose of efficient air ejection, the air is ejected when necessary. Then, in this state, it is extruded downward to form a laminated aluminum container as shown in FIG.

  Here, the manufacturing method of the 1st type | mold member by a thin-plate lamination method is demonstrated. As described above, the opening and the air supply hole in the molding apparatus 1 according to this embodiment have a complicated internal structure. For example, it is difficult to create a mold member having a complicated internal structure as described above by a typical mold member production method in which a cylindrical metal lump is prepared and cut.

  7 is a schematic perspective view of a cylindrical body for use in manufacturing the first mold member shown in FIG. 1 (shown by a two-dot chain line in FIG. 8; the same applies to FIGS. 9, 10 and 14). 8 is a cross-sectional view taken along line VIII-VIII shown in FIG.

  Referring to the figure, a first cylindrical body 51 made of a metal such as iron having a cylindrical shape and an opening 61 having a circular shape in plan view at the center thereof is arranged so that its axial direction is vertical. Has been. A second cylindrical body 52 in which a plurality of thin plates made of metal such as iron and having an opening having substantially the same shape as the opening 61 is stacked below the first cylindrical body 51 overlaps the first cylindrical body 51. Are arranged as follows. The second cylindrical body is a portion having the complicated internal structure described above, and details thereof will be described later. A third cylindrical body 53 made of a metal such as iron having a cylindrical shape and having an opening having substantially the same shape as the opening 61 overlaps the second cylindrical body 52 below the second cylindrical body 52. Has been placed.

  Each of the first cylindrical body 51, the second cylindrical body 52, and the third cylindrical body 53 has an opening 62 that has a circular shape in plan view and is aligned so as to penetrate in the vertical direction in an overlapping state. 63 are formed on the outer side so as to face each other. Then, the first cylindrical body 51, the second cylindrical body 52, and the third cylindrical body 53 are held in an overlapping state by inserting the holding members 55a and 55b having a columnar shape through the openings 62 and 63. Will be.

  Next, the shape of each cylindrical body will be described.

  FIG. 9 is a plan view of the first cylindrical body shown in FIG.

  Referring to the drawing, as described above, the first cylindrical body 51 has an opening 61a formed at the center thereof and openings 62a and 63a formed so as to face each other on the outer side. The openings 62a and 63a are for inserting a holding member for holding the first cylindrical body 51, the second cylindrical body 52, and the third cylindrical body 53 in an overlapping state as described above.

  FIG. 10 is a plan view showing the shapes of two types of thin plates constituting the second cylindrical body shown in FIG. 7, and FIG. 11 is a plan view of the two types of thin plates shown in FIG. 12 is an enlarged view of a Y portion shown in FIG. 10, and FIG. 13 is an enlarged cross-sectional view taken along line XIII-XIII shown in FIG.

  First, referring to FIG. 10 (1), FIG. 12 and FIG. 13, the thin plate 52a has an opening 61b formed at the center thereof and openings 62b and 63b formed so as to face each other on the outer side. Has been. The openings 62b and 63b are for inserting the holding member as described above. Further, circular first openings 4a and second openings 5a are alternately formed in the circumferential direction so as to surround the opening 61b in a circumferential shape, and each of the first openings 4a is directed from the respective one to the opening 61b. A first groove 6 extending in the direction is formed.

  Next, referring to (2) of FIG. 10, the thin plate 52b has substantially the same shape as the thin plate 52a, and each opening is provided at a position corresponding to the thin plate 52a. However, the first groove 6 described above is not formed in the thin plate 52b, and the second groove 7 extending from each of the second openings 5b toward the opening 61c is formed.

  Next, referring to FIG. 11, when the above-described thin plates 52a and 52b are overlapped, such a state is obtained. In FIG. 11, it arrange | positions so that the thin plate 52a may become upper. As shown in the figure, the openings 61b, 62b and 63b, the first opening 4a and the second opening 5a of the thin plate 52a, and the openings 61c, 62c and 63c, the first opening 4b and the second opening 5b of the thin plate 52b are Since each opening is formed at a position corresponding to, all these openings are overlapped and inserted vertically. Since the first groove 6 and the second groove 7 are formed only in each of the thin plates 52a and 52b, they are not inserted vertically like these openings.

  In FIG. 11, the two thin plates are overlapped, but a plurality of the thin plates 52a and 52b are alternately overlapped to form the second cylindrical body 52 shown in FIG. That is, when the first groove 6 and the second groove 7 are viewed from the axial center of the second cylindrical body 52, these end portions are alternately and uniformly arranged in the vertical direction as openings. Each of these openings is a first opening 4a, 4b or a second opening which is inserted in the vertical direction by overlapping a plurality of thin plates 52a, 52b via the first groove 6 or the second groove 7. It communicates with 5a, 5b.

  FIG. 14 is a plan view of the third cylindrical body shown in FIG.

  Referring to the drawing, the central opening 61d and the openings 62d and 63d formed on the outer side are the same as the first cylinder and the second cylinder. In the third cylindrical body 53, in addition to this, a circular groove 22 having a ring shape in plan view formed so as to surround the opening 61d is formed, and at the bottom of the circular groove 22, downward in FIG. An air supply hole 24 having a cylindrical shape that extends is formed.

  Here, referring to FIGS. 7 and 8 again, the cylindrical bodies formed as described above are superposed in the order of the first cylindrical body 51, the second cylindrical body 52, and the third cylindrical body 53 from the top. These superposed states are held by the holding members 55a and 55b. Then, these are integrated by, for example, a diffusion bonding method using diffusion of atoms generated between the bonding surfaces. By cutting the integrated first cylindrical body 51, second cylindrical body 52, and third cylindrical body 53 into the shape of the first mold member indicated by the two-dot chain line in FIGS. 8 to 10 and FIG. The cylindrical body 20 of the first mold member 10 having the plurality of openings 2 shown in FIG. 1 is formed.

  Thus, by manufacturing the specific part of the first mold member having the opening for ejecting air by the thin plate lamination method, the accuracy of the position and size of the opening is improved and the cost is advantageous. It becomes a mold member.

  In addition, in the manufacturing method of said 1st type | mold member, although only the specific part is manufactured by the thin plate lamination method, it cannot be overemphasized that the whole or parts other than a specific part may be manufactured by the thin plate lamination method. .

  Moreover, the manufacturing method of the first mold member is not limited to the above-described thin plate lamination method, and other methods may be used as long as an opening for ejecting air can be formed.

  In the above embodiment, the first mold member and the second mold member have specific shapes. However, the first mold member and the first mold member are covered with a sheet. You may press-mold a to-be-molded body by the 2nd type | mold member arrange | positioned so that it may oppose through a molded object. In this case, an opening is provided in at least one of the press surface of the first mold member and the press surface of the second mold member, and air is ejected from the opening when the molded body is pressed. Also good. Alternatively, when the molded body is pressed into at least one of the space between the molded body and the press surface of the first mold member and the space between the molded body and the press surface of the second mold member. In addition, air may be ejected.

  Further, in the above embodiment, the driving means is for driving the second mold member, but it is capable of driving at least one of the first mold member and the second mold member. May be.

  Furthermore, in the above embodiment, air is blown out in order to exert a buffering effect, but other gases may be used.

  Further, in the above-described embodiment, the openings for ejecting air are formed to have substantially the same size and are arranged almost uniformly. However, the openings are not necessarily the same size. It does not have to be arranged uniformly.

  Furthermore, in the above-described embodiment, the openings for ejecting air are provided in the peak and valley portions of the first step groove and the second step groove, but the first step groove or the second step groove is provided. As long as it is a press surface composed of stepped grooves, it may be provided in other portions.

  Furthermore, in the above embodiment, the molded body is a plurality of laminated aluminum foil sheets, but the molded body may be other than an aluminum foil sheet such as a resin sheet such as polypropylene or a paper sheet. . Further, the number of sheets may be one instead of plural.

  Further, in the above embodiment, air is ejected from the opening, but a mist-like lubricant may be ejected. By ejecting the lubricant from the opening, only a predetermined amount of lubricant can be efficiently laid on a specific portion of the molded body, so that the amount of lubricant to be used is reduced compared to the conventional case.

  Here, various numerical values of the molding apparatus 1 according to the first embodiment were set, and molding experiments were performed.

  Referring to FIG. 8 again, A, that is, the height of the portion from which air is ejected is 22.0 mm, B is 7.3 mm, C is approximately 90.0 mm, and D is approximately 50.0 mm. 12 and 13 again, the diameter E and diameter F of the first opening 4a and the second opening 5a used for air supply are 1.0 mm, the first groove 6 and the second groove (not shown). ) Width G was 0.3 mm, and the thickness H of the thin plate was 0.5 mm. In addition, about drawing, the drawing is simplified about the number of the thin plate of the thin-plate laminated part of the 2nd cylindrical body 52 in FIG.

As described above, after limiting the dimensional numerical value of the molding apparatus 1, the projection density in the plan view of the openings through which the air is ejected is set to about 140 pieces / cm ² . That is, the openings are formed at intervals of 0.5 mm corresponding to the thickness of the thin plate in the vertical direction and at intervals of 1.5 to 2.0 mm corresponding to the crest and trough portions in the horizontal direction. And the whole air flow rate from a gas ejection means shall be about 0.2 m < ³ > / min.

  Next, Sample 1 is a stack of 10 sheets of paper having a thickness of about 60 μm, Sample 2 is a stack of 20 sheets of film having a thickness of 32 μm, and Sample 3 is a stack of 40 sheets of aluminum foil having a thickness of 11 μm. To do.

  In this experiment, each sample was placed on the first mold member, the compression speed of the hook-shaped push rod of the second mold member was 100 mm / min, the moving distance was 30 mm, and molding was performed with or without air ejection. In order to evaluate the load, the peak resistance value was measured. The peak resistance value was measured by attaching the hook-shaped push rod of the second mold member to the load cell side of the compression tester and attaching the first mold member to the support side. The compression tester used was Shimadzu Corporation product name: Autograph AGS-1KNG.

  The following table is a table showing peak resistance values during molding using Sample 1, Sample 2, and Sample 3.

上記の表を参照して、試料１、試料２及び試料３の全ての試料において、空気の噴出をしない従来の成形方法でのピーク抵抗値に比べ、空気の噴出をおこなう成形方法のピーク抵抗値のほうが低い値を示すことが分かった。即ち、この実施例による成形装置１によると、成形時における被成形体に対する負荷が減少することが判明した。

With reference to the above table, the peak resistance value of the molding method in which air is ejected in all of the samples 1, 2, and 3 compared to the peak resistance value in the conventional molding method in which no air is ejected. Was found to be lower. That is, according to the molding apparatus 1 according to this example, it has been found that the load on the molding object during molding is reduced.

In the above embodiment, the projection density in the plan view of each of the openings is set to about 140 / cm ² in order to make the gas ejection state uniform, but the projection density is 50 to 300 / cm ^2. it may be any cm ^2. When the projection density is less than 50 pieces / cm ^2, a portion having an insufficient buffering effect on the object to be molded is generated, so that the gas ejection density may not be uniform. Further, when the projection density exceeds 300 / cm ² , the buffering effect is saturated, and the first mold member requires more processing accuracy than necessary.

  In the above embodiment, each of the openings has a rectangular shape of 0.5 mm × 0.3 mm, but the opening area corresponding to a circle having a diameter of 0.05 to 1.00 mm. If it has, the ejection of air from the opening is stabilized, and the possibility that the molded body is caught by the opening is reduced. Even if the opening area is equivalent to a circle with a diameter of less than 0.05 mm, there is no effect on the buffering effect if the flow rate of the blown air is sufficient, but from the viewpoint of processing, 0.05 mm or more is adopted. It is desirable to do.

It is a disassembled perspective view which shows schematic structure of the shaping | molding apparatus by 1st Embodiment of this invention. It is sectional drawing of the II-II line shown in FIG. FIG. 3 is an enlarged view of a portion X shown in FIG. 2. It is sectional drawing of the IV-IV line shown in FIG. It is an expanded sectional view of the VV line shown in FIG. It is the schematic process figure which showed the shaping | molding method which shape | molds a laminated aluminum foil container with the shaping | molding apparatus shown in FIG. It is a schematic perspective view of the cylindrical body used for manufacture of the 1st type | mold member shown in FIG. It is sectional drawing of the VIII-VIII line shown in FIG. It is a top view of the 1st cylindrical body shown in FIG. It is a top view which shows the shape of two types of thin plates which comprise the 2nd cylindrical body shown in FIG. It is a top view of the state which piled up two types of thin plates shown in FIG. It is an enlarged view of the Y part shown in FIG. It is an expanded sectional view of the XIII-XIII line shown in FIG. It is a top view of the 3rd cylindrical body shown in FIG. It is an external appearance perspective view of the lamination | stacking aluminum foil container obtained by press-molding the laminated | stacked aluminum foil sheet | seat. It is a disassembled perspective view which shows schematic structure of the shaping | molding apparatus for forming the conventional aluminum foil container. It is the figure which showed the mounting process which mounts 1 set of shaping | molding unit sheets in the shaping | molding apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Molding apparatus 2 ... Opening 10 ... 1st type | mold member 11 ... 1st step groove 12 ... 2nd step groove 17 ... Hollow wall surface 20 ... Cylindrical body 30 ... 2nd type | mold member 31 ... Saddle-shaped push rod 33 ... Gear-shaped groove 35 ... conical body 37 ... lower part 39 ... bevel gear-shaped groove 41 ... hollow part 50 ... molded unit sheet In addition, the same code | symbol in each figure shows the same or an equivalent part.

Claims (9)

A molding apparatus for press-molding a sheet-shaped workpiece,
A first mold member;
A second mold member disposed so as to face the first mold member via the molding target;
Drive means capable of driving at least one of the first mold member and the second mold member so as to press the molded body;
An opening is provided in at least one of the press surface of the first mold member and the press surface of the second mold member,
Furthermore, a gas ejection means capable of ejecting gas from the opening is provided,
A molding apparatus in which gas is ejected from the opening when the molding target is pressed. The first mold member is:
It has a cylindrical shape extending in the vertical direction, and its upper surface is inclined upward from the inside to the outside and is formed with a first step groove formed radially, and the first step is formed on its hollow wall surface. A second step groove connected to the groove includes a cylindrical body formed in parallel in the vertical direction;
The second mold member is:
A cylindrical hollow part extending in the vertical direction and penetrating the center part up and down is formed, and the side wall has a cone formed with a bevel gear groove corresponding to the first step groove,
The cylinder has a cylindrical shape in which the lower surface position is aligned with the lower surface of the cone and the lower part is tapered. The side wall includes a hook-shaped push rod in which a gear-shaped groove corresponding to the second step groove is formed in the vertical direction on the side wall;
The driving means drives the cone-shaped push rod downward after driving the cone downward.
2. The molding apparatus according to claim 1, wherein a plurality of the openings are formed in a predetermined range of the first step groove and the second step groove in the vicinity of an upper end portion of the hollow wall surface in the cylindrical body. The molding apparatus according to claim 2, wherein each of the openings is formed to have substantially the same size and is arranged substantially uniformly. The molding apparatus according to claim 2 or 3, wherein the opening is formed in a crest portion and a trough portion of each of the first step groove and the second step groove. 5. The molding apparatus according to claim 2, wherein each of the openings has an opening area corresponding to a circle having a diameter of 0.05 to 1.00 mm. 5. The molding apparatus according to claim ² , wherein a projection density of each of the openings in a plan view is 50 to 300 / cm ² . The molding device according to any one of claims 2 to 6, wherein the specific portion of the cylindrical body is formed by processing a die by a thin plate lamination method, and each of the openings is formed in the specific portion. A molding method for press molding a sheet-shaped workpiece,
Disposing the molded body between the first mold member and the second mold member facing each other;
The first mold member and the second mold member are brought close to each other to press the object to be molded, and the space between the object to be molded and the press surface of the first mold member and the object to be molded And a step of jetting gas into at least one of the spaces between the body and the press surface of the second mold member. A molding method for press-molding a laminated disk-shaped object to be molded,
A step of placing the molded body on the upper surface of the first mold member having a cylindrical shape extending in the vertical direction, the upper surface of which is inclined upward from the inside toward the outside;
A step of lowering a cone formed with a cylindrical hollow portion that is disposed above the molded body and extends in the vertical direction and vertically penetrates the center portion, and presses the molded body;
When a saddle-shaped push rod having a horizontal cross section that is slidably engaged with the hollow portion and vertically inserted into the hollow wall surface is lowered, and the central portion of the molded body is pushed into the hollow portion of the cylindrical body. And a step of jetting gas from at least a part of the upper surface of the first mold member toward the molding target and jetting gas from the upper part of the hollow portion.

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