WO2013030957A1 - Multistage press device and method for manufacturing intermediate mold included therein - Google Patents

Multistage press device and method for manufacturing intermediate mold included therein Download PDF

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Publication number
WO2013030957A1
WO2013030957A1 PCT/JP2011/069631 JP2011069631W WO2013030957A1 WO 2013030957 A1 WO2013030957 A1 WO 2013030957A1 JP 2011069631 W JP2011069631 W JP 2011069631W WO 2013030957 A1 WO2013030957 A1 WO 2013030957A1
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WO
WIPO (PCT)
Prior art keywords
mold
intermediate mold
model
sand
casting
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Application number
PCT/JP2011/069631
Other languages
French (fr)
Japanese (ja)
Inventor
卓也 松村
幸嗣 長谷川
山本　博己
寿徳 丸山
貴弘 星野
Original Assignee
トヨタ自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by トヨタ自動車株式会社 filed Critical トヨタ自動車株式会社
Priority to CN201180073162.2A priority Critical patent/CN103764382B/en
Priority to PCT/JP2011/069631 priority patent/WO2013030957A1/en
Priority to JP2013530938A priority patent/JP5692392B2/en
Publication of WO2013030957A1 publication Critical patent/WO2013030957A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/12—Accessories
    • B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/04—Use of lost patterns
    • B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/022—Moulds for compacting material in powder, granular of pasta form

Definitions

  • the present invention relates to a multistage press apparatus that simultaneously presses a plurality of workpieces, and a method of manufacturing an intermediate mold included therein.
  • the upper die and the lower die arranged between the upper die located at the upper end and the lower die located at the lower end are respectively fixed to the upper and lower surfaces of the plate-like die plate.
  • a member constituted by a die plate and an upper die and a lower die fixed to the die plate is referred to as an “intermediate die”.
  • a multi-stage press apparatus provided with two pairs of molds is provided with one intermediate mold, and a multi-stage press apparatus provided with three pairs of molds is provided with two intermediate dies. It becomes.
  • the upper mold and the lower mold and at least one intermediate mold are arranged along the vertical direction.
  • the height (length in the vertical direction) of the multistage press apparatus is increased due to the structure, resulting in an increase in equipment costs.
  • the intermediate mold is configured by fixing the upper mold and the lower mold to the upper and lower surfaces of the die plate, respectively, and the configuration of such an intermediate mold greatly affects the increase in size of the multistage press apparatus. is doing.
  • this since there are cases where two or more intermediate dies are provided in the multistage press apparatus, this also greatly affects the enlargement of the multistage press apparatus.
  • An object of the present invention is to provide a small multi-stage press apparatus with a suppressed height and a method of manufacturing an intermediate mold included therein.
  • the multi-stage press apparatus of the present invention is a multi-stage press apparatus that simultaneously presses a plurality of workpieces, an upper mold having a molding surface formed on the lower surface, a lower mold having a molding surface formed on the upper surface, At least one intermediate mold disposed between the upper mold and the lower mold, wherein the intermediate mold is formed with molding surfaces on the upper surface and the lower surface, respectively, and the two molding surfaces of the intermediate mold are
  • the part to be formed is constituted by one member.
  • the intermediate mold manufacturing method of the present invention is an intermediate mold manufacturing method included in the multistage press apparatus, and corresponds to two molding surfaces of the intermediate mold in a model formed in the same shape as the intermediate mold. Reinforcing step for reinforcing the model by a reinforcing member that supports the portion on which the surface is formed, and a model reinforced in the reinforcing step, the surface corresponding to the two molding surfaces of the intermediate mold in the model
  • a casting process functioning as a mold is placed in a housing process in which the model is stored in the housing process and a housing process in which the model is housed in the housing process so as to be positioned along the vertical direction.
  • a first sand filling step, and the casting frame into which the foundry sand is put in the first sand filling step is turned upside down, and the reinforcing member is removed from the model, and then the casting is placed inside the inverted casting frame.
  • the reinforcing member includes a surface corresponding to one molding surface of the intermediate mold and a mounting surface in the model housed in the casting frame in the housing step. It is preferable to be configured to fill a gap formed between the two.
  • the reinforcing member includes a surface corresponding to one molding surface of the intermediate mold and a mounting surface in the model housed in the casting frame in the housing step. It is preferable to have a plurality of flat surfaces that are arranged in a gap formed between and abut on a flat portion of the surface that forms the gap in the model.
  • the figure which shows the multistage press apparatus which concerns on this invention The flowchart which shows the manufacturing method of the intermediate type
  • the figure which shows a reinforcement process The figure which shows a storage process.
  • the multistage press apparatus 1 which is one Embodiment of the multistage press apparatus which concerns on this invention is demonstrated.
  • the multistage press apparatus 1 is a press machine in which a plurality of processing parts (two in the present embodiment) for processing a workpiece such as a steel plate are provided in the vertical direction. Press work at the same time.
  • the vertical direction in FIG. 1 is defined as the vertical direction of the multistage press apparatus 1.
  • the vertical direction of the multistage press device 1 coincides with the vertical direction.
  • the left-right direction in FIG. 1 is defined as the left-right direction of the multistage press apparatus 1.
  • the multistage press device 1 includes a structure having an upper fixing portion 2, a lower fixing portion 3, guide posts 4, 4, 4, a die plate 5, and die holders 6, 6. And an upper mold 10, a lower mold 20, and an intermediate mold 30 attached to the structure.
  • the upper fixing part 2 and the lower fixing part 3 are substantially rectangular parallelepiped members.
  • the upper fixing part 2 and the lower fixing part 3 are spaced apart from each other in the vertical direction, and are fixed via guide posts 4, 4, 4, 4 so as to face each other.
  • the guide posts 4, 4, 4, 4 are substantially cylindrical members that extend in the vertical direction.
  • the guide posts 4, 4, 4, 4 are configured to connect the four corners of the lower surface of the upper fixing portion 2 and the four corners of the upper surface of the lower fixing portion 3. That is, the upper ends of the guide posts 4, 4, 4, 4 are fixed to the four corners of the lower surface of the upper fixing portion 2, and the lower ends of the guide posts 4, 4, 4, 4 are the four corners of the upper surface of the lower fixing portion 3. And are fixed.
  • the die plate 5 is a rectangular plate material, and is disposed with its plate surface directed in the vertical direction.
  • the die plate 5 slides on the guide posts 4, 4, 4, 4 and is configured to be movable in the vertical direction on the upper mold 10 attached to the lower surface of the die plate 5.
  • four through holes for inserting the guide posts 4, 4, 4, 4 are formed along the vertical direction at the four corners of the plate surface of the die plate 5.
  • the sliding parts 5a, 5a, 5a, 5a formed so as to cover the outer peripheral surfaces of the guide posts 4, 4, 4, 4 are fixed.
  • the sliding portion 5a is a cylindrical member, and is configured to be slidable on the guide post 4.
  • the die plate 5 is connected to the upper fixing portion 2 via the connecting portion 5b.
  • the connecting portion 5 b is a toggle mechanism that connects the upper fixing portion 2 and the die plate 5.
  • the connecting portion 5b is configured to expand and contract in the vertical direction by an actuator such as a hydraulic cylinder so that the die plate 5 can be moved in the vertical direction.
  • actuators such as a hydraulic cylinder.
  • the die holders 6 and 6 are rectangular plate materials, and the plate surfaces thereof are arranged in the vertical direction.
  • the die holders 6 and 6 are disposed between the lower fixing portion 3 and the die plate 5.
  • the die holders 6 and 6 are fixed to the intermediate mold 30 with the intermediate mold 30 sandwiched from the left and right.
  • the left die holder 6 is configured to be slidable on the left guide post 4, 4, and the right die holder 6 is configured to be slidable on the right guide post 4, 4.
  • the intermediate die 30 attached to the can be moved in the vertical direction.
  • the left die holder 6 is formed with two through-holes through which the left guide posts 4 and 4 are inserted, and the right die holder 6 has the right guide posts 4 and 4.
  • the sliding portion 6a is a cylindrical member configured in substantially the same manner as the sliding portion 5a, and is configured to be slidable on the guide post 4.
  • the upper mold 10, the lower mold 20, and the intermediate mold 30 are arranged along the vertical direction from the upper mold 10, the intermediate mold 30, and the lower mold 20 in this order, and constitute two processing parts for processing the workpiece. is doing.
  • the work is drawn, and at the same time, the work is bent in the processing part composed of the upper mold 10 and the intermediate mold 30.
  • the workpiece that is bent by the upper die 10 and the intermediate die 30 is a workpiece that has been drawn by the lower die 20 and the intermediate die 30.
  • type 30 are comprised so that a press work may be simultaneously performed with respect to two types of workpiece
  • the upper mold 10 is a mold having a molding surface formed on the lower surface, and is fixed to the lower surface of the die plate 5.
  • the upper mold 10 includes an upper mold body 11 and a pad 12, and a molding surface 11 a of the upper mold body 11 and a molding surface 12 a of the pad 12 constitute a molding surface of the upper mold 10.
  • the upper mold body 11 is a main component of the upper mold 10.
  • a concave portion that is recessed upward is formed in a central portion in the left-right direction of the upper mold main body 11, and a pad 12 is provided in the concave portion.
  • the pad 12 is provided in a recess formed in the upper mold main body 11 so as to be movable in the vertical direction.
  • the pad 12 is urged downward by a predetermined urging means, and when the workpiece is bent by the upper die 10 and the intermediate die 30, the central portion in the left-right direction of the workpiece is combined with the intermediate die 30. Hold and restrain.
  • the lower mold 20 is a mold having a molding surface formed on the upper surface, and is fixed to the upper surface of the lower fixing portion 3.
  • the lower mold 20 includes a lower mold body 21 and a cushion ring 22, and a molding surface 21 a of the lower mold body 21 and a molding surface 22 a of the cushion ring 22 constitute a molding surface of the lower mold 20.
  • the lower mold body 21 is a main component of the lower mold 20, and a molding surface 21a is formed at a central portion in the left-right direction.
  • the lower mold main body 21 is formed with a recess recessed downward so as to surround the molding surface 21a, and a cushion ring 22 is provided in the recess.
  • the cushion ring 22 is provided in a recess formed in the lower mold main body 21 so as to be movable in the vertical direction.
  • the cushion ring 22 is biased upward by a predetermined biasing means, and when the workpiece is drawn by the lower die 20 and the intermediate die 30, the outer edge portion of the workpiece is sandwiched with the intermediate die 30. to bound.
  • the intermediate mold 30 is a mold manufactured as one member by a full mold casting method or the like.
  • An upper molding surface 31 and a lower molding surface 32 are formed on the upper surface and the lower surface of the intermediate mold 30, respectively.
  • the upper molding surface 31 of the intermediate mold 30 is formed according to the shape of the molding surface of the upper mold 10 (the molding surface 11a of the upper mold body 11 and the molding surface 12a of the pad 12).
  • 32 is formed according to the shape of the molding surface of the lower mold 20 (the molding surface 21a of the lower mold body 21 and the molding surface 22a of the cushion ring 22).
  • the intermediate mold 30 is constituted by one member, and the upper molding surface 31 and the lower molding surface 32 are formed on the upper surface and the lower surface, respectively.
  • the intermediate die 30 is configured to be sandwiched from the side (in the present embodiment, left and right) by the die holders 6 and 6 without using a die plate. That is, the intermediate mold 30 is movable in the vertical direction via the die holders 6 and 6. Accordingly, the height (vertical length) of the intermediate mold 30 can be reduced as compared with the conventional intermediate mold configured by fixing the upper mold and the lower mold to the upper and lower surfaces of the die plate. it can. Therefore, it is possible to reduce the size of the multistage press device 1. A portion of the intermediate mold 30 where the upper molding surface 31 and the lower molding surface 32 are not formed is formed so as to project upward from the upper molding surface 31 and project downward from the lower molding surface 32. ing.
  • the entire intermediate mold 30 is configured as one member, but at least a portion where the upper molding surface 31 and the lower molding surface 32 are formed may be configured as one member.
  • one intermediate mold is provided.
  • the number of intermediate molds is not limited, and it is sufficient that at least one intermediate mold is provided.
  • the manufacturing process S1 is a process for manufacturing the intermediate mold 30 by a full mold casting method.
  • the full mold casting method is a casting method for producing a casting having the same shape as the model by embedding a model that disappears by the heat of the molten metal in sand and replacing the model with the molten metal.
  • the production process S1 includes a reinforcement process S11, a storage process S12, a first sand filling process S13, a second sand filling process S14, and a pouring process S15. Repeat in order.
  • the reinforcing step S ⁇ b> 11 is a step of reinforcing the disappearance model 40 with the reinforcing member 50.
  • the vanishing model 40 is a polystyrene model generally used in a full mold casting method, and is formed in a shape substantially the same as that of the intermediate mold 30.
  • a surface corresponding to the upper molding surface 31 of the intermediate mold 30 is a first surface 41
  • a surface corresponding to the lower molding surface 32 of the intermediate mold 30 is a second surface 42.
  • the reinforcing member 50 is a foamed polystyrene member that reinforces the disappearance model 40 by supporting a portion of the disappearance model 40 where the first surface 41 and the second surface 42 are formed.
  • the reinforcing member 50 When the vanishing model 40 is placed at a predetermined location such that the first surface 41 is located on the lower side and the second surface 42 is located on the upper side, the reinforcing member 50
  • the vanishing model 40 is reinforced by completely filling the gap formed between the surface 41 (see FIG. 4). That is, the reinforcing member 50 is formed in the same shape as the gap.
  • the reinforcing member 50 can be manufactured based on CAD data of the intermediate mold 30 or the like.
  • the material of the reinforcing member 50 is not limited as long as the disappearance model 40 can be reinforced.
  • the reinforcing member 50 is attached to the vanishing model 40 so as to fill the gap, and the vanishing model 40 is reinforced.
  • the storing step S ⁇ b> 12 is a step of storing the disappearance model 40 reinforced by the reinforcing member 50 in the reinforcing step S ⁇ b> 11 in the casting frame 60.
  • the casting frame 60 is a box-shaped casting frame generally used in a full mold casting method.
  • the cast frame 60 includes a substantially rectangular parallelepiped main body portion 61 whose upper and lower surfaces are open, and a lid portion 62 that closes one open portion of the main body portion 61.
  • a plurality of main body portions 61 can be stacked in the vertical direction, and when the storing step S12 is performed, the two main body portions 61 and 61 are stacked.
  • the lid part 62 is disposed so as to close the lower open part of the two stacked main body parts 61 and 61.
  • the lid 62 is not fixed to the lower main body 61 and can be easily switched between opening and closing of the lower surface of the main body 61.
  • the disappearance model 40 is stored in the casting frame 60 so that the first surface 41 and the second surface 42 are positioned along the vertical direction.
  • the vanishing model 40 reinforced by the reinforcing member 50 is arranged such that the upper surface of the lid portion 62 of the casting frame 60 such that the first surface 41 is located on the lower side and the second surface 42 is located on the upper side. Placed on.
  • a gap formed between the upper surface of the lid portion 62 of the casting frame 60 and the first surface 41 is filled with the reinforcing member 50.
  • the upper end surfaces of the two stacked main body portions 61 and 61 are positioned above the upper end surface of the vanishing model 40.
  • the first sand filling step S ⁇ b> 13 is a step of putting the foundry sand 70 into the inside of the casting frame 60 in which the lost model 40 is accommodated in the accommodating step S ⁇ b> 12.
  • the foundry sand 70 is foundry sand generally used in the full mold casting method, and functions as a mold.
  • the foundry sand 70 is obtained by adding a resin or the like to sand such as silica sand, and is hardened when a predetermined time elapses after being put into the casting frame 60.
  • the foundry sand 70 is put into the casting frame 60 so that the disappeared model 40 reinforced by the reinforcing member 50 is buried in the foundry sand 70. More specifically, the foundry sand 70 is put into the casting frame 60 until the foundry sand 70 reaches the height (position in the vertical direction) of the upper end surfaces of the two stacked main body portions 61 and 61 as a whole. At this time, since the vanishing model 40 is reinforced by the reinforcing member 50, the portion of the vanishing model 40 where the first surface 41 and the second surface 42 are formed is bent or damaged by the weight of the foundry sand 70. This can be prevented.
  • the thickness (distance from the 1st surface 41 to the 2nd surface 42) of the part in which the 1st surface 41 and the 2nd surface 42 in the vanishing model 40 were formed can be made small, and the vanishing model 40 is extended.
  • the height (vertical length) can be reduced. Therefore, the height of the intermediate mold 30 produced based on the disappearance model 40 can be reduced.
  • the foundry sand 70 is poured into the casting frame 60 so that a pouring port 71 for pouring the molten metal is formed.
  • the pouring port 71 can be formed by, for example, throwing the foundry sand 70 into the casting frame 60 with a cylindrical member inserted into the disappearance model 40.
  • the casting frame 60 into which the casting sand 70 has been put in the first sand filling step S ⁇ b> 13 is turned upside down, and the casting sand 70 is newly put into the casting frame 60. It is a process to do.
  • the casting frame 60 is turned upside down in a state where the foundry sand 70 put into the casting frame 60 in the first sand filling step S13 is cured.
  • the reinforcing member 50 is removed from the disappearance model 40.
  • the foundry sand 70 is newly placed in the casting frame 60 so that the disappeared model 40 is completely buried in the foundry sand 70 ( Specifically, it is put into the newly added main body 61). In this way, the disappearance model 40 is completely buried in the foundry sand 70 put in the casting frame 60 (specifically, the three main body portions 61, 61, 61 stacked).
  • the foundry sand 70 introduced into the inside of the casting frame 60 in the second sand filling step S ⁇ b> 14 is cured when a predetermined time elapses after being introduced into the casting frame 60.
  • the pouring step S15 is a step of supplying molten metal to the disappeared model 40 in the casting frame 60 into which the foundry sand 70 has been introduced in the second sand filling step S14.
  • the molten sand reaches the disappearance model 40 by injecting a high-temperature molten metal into the pouring port 71 after the foundry sand 70 put in the casting frame 60 is hardened.
  • the disappearance model 40 lose
  • the solidified molten metal is taken out from the foundry sand 70 and subjected to predetermined processing, whereby the intermediate mold 30 is completed.
  • the reinforcing member in the present invention is not limited to the reinforcing member 50 configured to fill the gap, and the following reinforcing member 150 may be applied.
  • the reinforcing member 150 is disposed in the gap, like the reinforcing member 50, and disappears by supporting the portion where the first surface 41 and the second surface 42 of the disappearance model 40 are formed. It is a member that reinforces the model 40.
  • the reinforcing member 150 includes a plurality of upper contact portions 151, 151... And a plurality of side contact portions 152, 152.
  • the upper contact portion 151 protrudes upward, and a protruding end surface (see the hatched pattern portion in FIG. 7) is formed as a flat surface.
  • a plurality of upper abutting portions 151 are formed in accordance with the position of the flat portion so that the protruding end surface abuts on the flat portion of the first surface 41 of the disappearance model 40.
  • the flat portion of the first surface 41 in the disappearance model 40 is, for example, a surface for processing a portion of the upper molding surface 31 of the intermediate die 30 that will not eventually become a product (a portion to be removed later). It is a part corresponding to.
  • the molding surface for processing a part that finally becomes a product of the workpiece is mainly formed as a curved surface, but the molding surface for processing a part that does not finally become a product of the workpiece is , Mainly formed as a flat surface. Therefore, using the flat portion of the first surface 41 of the disappearance model 40 corresponding to the flat portion of the upper molding surface 31 of the intermediate mold 30 instead of the curved surface portion of a complicated shape, a flat surface that contacts the flat portion is used.
  • the upper abutting portion 151 having the reinforcing member 150 is formed. In this way, by providing the reinforcing member 150 with a plurality of upper contact portions 151, 151,...
  • the disappeared model 40 can be reinforced. Even if the flat portion of the first surface 41 of the disappearance model 40 and the flat surface (projecting end surface) of the upper contact portion 151 of the reinforcing member 150 are not in good contact, the upper contact portion 151 is not Since the shape of the protruding end surface of the upper contact portion 151 is also flat according to the shape of the simple structure, that is, the shape of the flat portion of the first surface 41 in the disappearance model 40, the upper contact portion 151 is easily corrected. It is possible.
  • a plurality of upper contact portions 151 are preferably provided in the reinforcing member 150 so as to be arranged to some extent evenly. What is necessary is just to provide the upper contact part 151a contact
  • FIG. The upper contact portion 151a is formed along the shape of the curved surface portion of the first surface 41 of the disappearance model 40 (see the black portion in FIG. 7). Since the curved surface portion of the first surface 41 of the disappearance model 40 has a complicated shape, it is desirable that the upper contact portion 151a is not provided on the reinforcing member 150 as much as possible.
  • the side contact portion 152 protrudes toward the side (direction perpendicular to the vertical direction), and the protruding end surface is formed as a flat surface.
  • the side abutment portion 152 has a plurality of projection end faces in contact with the flat portion of the surface along the vertical direction of the surface forming the gap in the disappearance model 40 according to the position of the flat portion. Is formed.
  • the shape of the disappearance model 40 is maintained by using the flat portion of the disappearance model 40 and forming the side contact portion 152 that contacts the flat portion on the reinforcing member 150.
  • the vanishing model 40 can be further reinforced.
  • the upper contact portion 151 and the side contact portion 152 are configured such that a flat surface is formed so as to contact the flat portion of the surface forming the gap in the disappearance model 40.
  • the reinforcing member 150 can have a relatively simple configuration, and the disappearance model 40 can be easily reinforced.
  • the reinforcing member 150 can be divided into a plurality of parts. By dividing the reinforcing member 150, it is possible to easily confirm whether the upper contact portion 151 and the side contact portion 152 and the disappearance model 40 are in proper contact for each divided piece.
  • the present invention can be used for a multi-stage press apparatus that simultaneously presses a plurality of workpieces, and an intermediate mold manufacturing method included therein.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Press Drives And Press Lines (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

Provided are a small multistage press device in which height is controlled and a method for manufacturing an intermediate mold included therein. The present invention is a manufacturing step (S1) for an intermediate mold (30) constituted of a single member and in which molding surfaces are formed on each of an upper surface and a lower surface. The manufacturing step (S1) comprises: a reinforcing step (S11) of reinforcing an evaporative pattern (40) which has the same shape as the intermediate mold (30) with a reinforcing member (50) that supports the portions of the evaporative pattern (40) on which surfaces corresponding to the two molding surfaces of the intermediate mold (30) are formed; a placement step (S12) in which the evaporative pattern (40) is placed within a casting frame (60) such that the surfaces corresponding to the two molding surfaces of the intermediate mold (30) are positioned along a perpendicular direction; a first sand filling step (S13) in which casting sand (70) is injected into the casting frame (60); a second sand filling step (S14) in which casting sand (70) is injected into the casting frame (60) after the casting frame (60) is reversed up-and-down and the reinforcing member (50) is removed from the evaporative pattern (40); and a pouring step (S15) in which the evaporative pattern (40) is replaced by a melt. A multistage press device (1) is provided with at least one intermediate mold (30).

Description

多段プレス装置、及びそれに含まれる中間型の製造方法Multi-stage press apparatus and method of manufacturing intermediate mold included therein
　本発明は、複数のワークに対して同時にプレス加工を行う多段プレス装置、及びそれに含まれる中間型の製造方法に関する。 The present invention relates to a multistage press apparatus that simultaneously presses a plurality of workpieces, and a method of manufacturing an intermediate mold included therein.
　従来、上型及び下型からなる金型が鉛直方向に複数設けられ、複数のワークに対して同時にプレス加工を行う多段プレス装置が広く知られている（例えば、特許文献１参照）。 Conventionally, a multi-stage press apparatus in which a plurality of molds including an upper mold and a lower mold are provided in the vertical direction and simultaneously presses a plurality of workpieces is widely known (for example, see Patent Document 1).
　上記の多段プレス装置においては、上端に位置する上型と、下端に位置する下型との間に配置された上型及び下型は、板状のダイプレートの上下面にそれぞれ固定されている。
　以下では、ダイプレートと、当該ダイプレートに固定された上型及び下型とから構成された部材を「中間型」と記す。
　例えば、二対の金型が設けられた多段プレス装置は、一つの中間型が設けられており、三対の金型が設けられた多段プレス装置は、二つの中間型が設けられていることとなる。 In the above multi-stage press apparatus, the upper die and the lower die arranged between the upper die located at the upper end and the lower die located at the lower end are respectively fixed to the upper and lower surfaces of the plate-like die plate. .
Hereinafter, a member constituted by a die plate and an upper die and a lower die fixed to the die plate is referred to as an “intermediate die”.
For example, a multi-stage press apparatus provided with two pairs of molds is provided with one intermediate mold, and a multi-stage press apparatus provided with three pairs of molds is provided with two intermediate dies. It becomes.
　このように、多段プレス装置においては、上型及び下型、並びに少なくとも一つの中間型が鉛直方向に沿って配置されている。そのため、構造上、多段プレス装置の高さ（鉛直方向の長さ）が大きくなり、設備費用の増加を招くという問題が生じる。
　特に、中間型は、前述のように、上型及び下型をそれぞれダイプレートの上下面に固定することによって構成されており、このような中間型の構成が多段プレス装置の大型化に大きく影響している。また、中間型は、多段プレス装置に二つ以上設けられる場合があるため、この点においても多段プレス装置の大型化に大きく影響している。 Thus, in the multistage press apparatus, the upper mold and the lower mold and at least one intermediate mold are arranged along the vertical direction. For this reason, the height (length in the vertical direction) of the multistage press apparatus is increased due to the structure, resulting in an increase in equipment costs.
In particular, as described above, the intermediate mold is configured by fixing the upper mold and the lower mold to the upper and lower surfaces of the die plate, respectively, and the configuration of such an intermediate mold greatly affects the increase in size of the multistage press apparatus. is doing. In addition, since there are cases where two or more intermediate dies are provided in the multistage press apparatus, this also greatly affects the enlargement of the multistage press apparatus.
特開２０００－０１５４９６号公報JP 2000-015496 A
　本発明は、高さを抑えた小型の多段プレス装置、及びそれに含まれる中間型の製造方法を提供することを課題とする。 An object of the present invention is to provide a small multi-stage press apparatus with a suppressed height and a method of manufacturing an intermediate mold included therein.
　本発明の多段プレス装置は、複数のワークに対して同時にプレス加工を行う多段プレス装置であって、下面に成形面が形成される上型と、上面に成形面が形成される下型と、当該上型と下型との間に配置される、少なくとも一つの中間型と、を具備し、前記中間型は、上面及び下面にそれぞれ成形面が形成され、前記中間型における二つの成形面が形成される部分は、一部材にて構成される。 The multi-stage press apparatus of the present invention is a multi-stage press apparatus that simultaneously presses a plurality of workpieces, an upper mold having a molding surface formed on the lower surface, a lower mold having a molding surface formed on the upper surface, At least one intermediate mold disposed between the upper mold and the lower mold, wherein the intermediate mold is formed with molding surfaces on the upper surface and the lower surface, respectively, and the two molding surfaces of the intermediate mold are The part to be formed is constituted by one member.
　本発明の中間型の製造方法は、前記多段プレス装置に含まれる中間型の製造方法であって、前記中間型と同形状に形成された模型における、前記中間型の二つの成形面に対応する面が形成された部分を支持する補強部材によって、前記模型を補強する補強工程と、前記補強工程にて補強された模型を、当該模型における、前記中間型の二つの成形面に対応する面が鉛直方向に沿って位置するように、箱状の鋳枠の内部に収納する収納工程と、前記収納工程にて前記模型が収納された鋳枠の内部に、鋳型として機能する鋳物砂を投入する第一砂込め工程と、前記第一砂込め工程にて前記鋳物砂が投入された鋳枠を上下反転し、前記模型から前記補強部材を取り除いた後、反転された鋳枠の内部に前記鋳物砂を投入する第二砂込め工程と、前記第二砂込め工程にて前記鋳物砂が投入された鋳枠内の模型に対して溶湯を供給する注湯工程と、を具備する。 The intermediate mold manufacturing method of the present invention is an intermediate mold manufacturing method included in the multistage press apparatus, and corresponds to two molding surfaces of the intermediate mold in a model formed in the same shape as the intermediate mold. Reinforcing step for reinforcing the model by a reinforcing member that supports the portion on which the surface is formed, and a model reinforced in the reinforcing step, the surface corresponding to the two molding surfaces of the intermediate mold in the model A casting process functioning as a mold is placed in a housing process in which the model is stored in the housing process and a housing process in which the model is housed in the housing process so as to be positioned along the vertical direction. A first sand filling step, and the casting frame into which the foundry sand is put in the first sand filling step is turned upside down, and the reinforcing member is removed from the model, and then the casting is placed inside the inverted casting frame. A second sand-filling step of adding sand; and Two sand-filling the foundry sand by step to anda pouring step of supplying molten metal against model frame cast that are submitted.
　本発明の中間型の製造方法において、前記補強部材は、前記収納工程にて前記鋳枠の内部に収納された前記模型における、前記中間型の一方の成形面に対応する面と、載置面との間に形成される空隙を埋めるように構成されることが好ましい。 In the intermediate mold manufacturing method of the present invention, the reinforcing member includes a surface corresponding to one molding surface of the intermediate mold and a mounting surface in the model housed in the casting frame in the housing step. It is preferable to be configured to fill a gap formed between the two.
　本発明の中間型の製造方法において、前記補強部材は、前記収納工程にて前記鋳枠の内部に収納された前記模型における、前記中間型の一方の成形面に対応する面と、載置面との間に形成される空隙に配置され、前記模型における、前記空隙を形成する面の平坦部分に当接する複数の平坦面を有することが好ましい。 In the intermediate mold manufacturing method of the present invention, the reinforcing member includes a surface corresponding to one molding surface of the intermediate mold and a mounting surface in the model housed in the casting frame in the housing step. It is preferable to have a plurality of flat surfaces that are arranged in a gap formed between and abut on a flat portion of the surface that forms the gap in the model.
　本発明によれば、多段プレス装置の小型化を実現できる。 According to the present invention, it is possible to reduce the size of the multistage press apparatus.
本発明に係る多段プレス装置を示す図。The figure which shows the multistage press apparatus which concerns on this invention. 本発明に係る多段プレス装置に含まれる中間型の製造方法を示すフローチャート。The flowchart which shows the manufacturing method of the intermediate type | mold contained in the multistage press apparatus which concerns on this invention. 補強工程を示す図。The figure which shows a reinforcement process. 収納工程を示す図。The figure which shows a storage process. 第一砂込め工程を示す図。The figure which shows a 1st sand filling process. 第二砂込め工程を示す図。The figure which shows a 2nd sand filling process. 補強部材の別形態を示す図。The figure which shows another form of a reinforcement member.
　以下では、図１を参照して、本発明に係る多段プレス装置の一実施形態である多段プレス装置１について説明する。
　多段プレス装置１は、鋼板等のワークを加工するための加工部が鉛直方向に複数（本実施形態においては、二つ）設けられたプレス機械であり、各加工部に対応するワークに対して同時にプレス加工を行う。
　なお、説明の便宜上、図１における上下方向を多段プレス装置１の上下方向と規定する。多段プレス装置１の上下方向は、鉛直方向に一致する。
　また、図１における左右方向を多段プレス装置１の左右方向と規定する。 Below, with reference to FIG. 1, the multistage press apparatus 1 which is one Embodiment of the multistage press apparatus which concerns on this invention is demonstrated.
The multistage press apparatus 1 is a press machine in which a plurality of processing parts (two in the present embodiment) for processing a workpiece such as a steel plate are provided in the vertical direction. Press work at the same time.
For convenience of explanation, the vertical direction in FIG. 1 is defined as the vertical direction of the multistage press apparatus 1. The vertical direction of the multistage press device 1 coincides with the vertical direction.
Moreover, the left-right direction in FIG. 1 is defined as the left-right direction of the multistage press apparatus 1.
　図１に示すように、多段プレス装置１は、上固定部２と、下固定部３と、ガイドポスト４・４・４・４と、ダイプレート５と、ダイホルダ６・６とを有する構造体と、当該構造体に取り付けられた上型１０、下型２０、及び中間型３０とを具備する。 As shown in FIG. 1, the multistage press device 1 includes a structure having an upper fixing portion 2, a lower fixing portion 3, guide posts 4, 4, 4, 4, a die plate 5, and die holders 6, 6. And an upper mold 10, a lower mold 20, and an intermediate mold 30 attached to the structure.
　まず、上固定部２と、下固定部３と、ガイドポスト４・４・４・４と、ダイプレート５と、ダイホルダ６・６とを有する構造体について説明する。 First, a structure having the upper fixing portion 2, the lower fixing portion 3, the guide posts 4, 4, 4, 4, the die plate 5, and the die holders 6 and 6 will be described.
　上固定部２及び下固定部３は、略直方体状の部材である。上固定部２及び下固定部３は、上下に離間して配置されており、互いに対向するようにガイドポスト４・４・４・４を介して固定されている。 The upper fixing part 2 and the lower fixing part 3 are substantially rectangular parallelepiped members. The upper fixing part 2 and the lower fixing part 3 are spaced apart from each other in the vertical direction, and are fixed via guide posts 4, 4, 4, 4 so as to face each other.
　ガイドポスト４・４・４・４は、上下方向に延出する略円柱状の部材である。ガイドポスト４・４・４・４は、上固定部２の下面の四隅と、下固定部３の上面の四隅とを接続するように構成されている。つまり、ガイドポスト４・４・４・４の上端部は、上固定部２の下面の四隅と固定され、ガイドポスト４・４・４・４の下端部は、下固定部３の上面の四隅と固定されている。 The guide posts 4, 4, 4, 4 are substantially cylindrical members that extend in the vertical direction. The guide posts 4, 4, 4, 4 are configured to connect the four corners of the lower surface of the upper fixing portion 2 and the four corners of the upper surface of the lower fixing portion 3. That is, the upper ends of the guide posts 4, 4, 4, 4 are fixed to the four corners of the lower surface of the upper fixing portion 2, and the lower ends of the guide posts 4, 4, 4, 4 are the four corners of the upper surface of the lower fixing portion 3. And are fixed.
　ダイプレート５は、矩形状の板材であり、その板面を上下方向に向けて配置されている。ダイプレート５は、ガイドポスト４・４・４・４上を摺動し、ダイプレート５の下面に取り付けられた上型１０を上下方向に移動可能に構成されている。
　詳細には、ダイプレート５の板面の四隅には、ガイドポスト４・４・４・４を挿通させるための四つの貫通孔が上下方向に沿って形成されており、当該四つの貫通孔には、ガイドポスト４・４・４・４の外周面を覆うように形成された摺動部５ａ・５ａ・５ａ・５ａが固定されている。
　摺動部５ａは、円筒状の部材であり、ガイドポスト４上を摺動可能に構成されている。 The die plate 5 is a rectangular plate material, and is disposed with its plate surface directed in the vertical direction. The die plate 5 slides on the guide posts 4, 4, 4, 4 and is configured to be movable in the vertical direction on the upper mold 10 attached to the lower surface of the die plate 5.
Specifically, four through holes for inserting the guide posts 4, 4, 4, 4 are formed along the vertical direction at the four corners of the plate surface of the die plate 5. The sliding parts 5a, 5a, 5a, 5a formed so as to cover the outer peripheral surfaces of the guide posts 4, 4, 4, 4 are fixed.
The sliding portion 5a is a cylindrical member, and is configured to be slidable on the guide post 4.
　ダイプレート５は、連結部５ｂを介して上固定部２と連結されている。
　連結部５ｂは、上固定部２とダイプレート５とを連結するトグル機構である。連結部５ｂは、油圧シリンダ等のアクチュエータによって上下方向に伸縮し、ダイプレート５を上下方向に移動可能に構成されている。
　なお、多段プレス装置１に連結部５ｂを設けず、ダイプレート５を直接、油圧シリンダ等のアクチュエータによって上下方向に移動可能に構成することも可能である。 The die plate 5 is connected to the upper fixing portion 2 via the connecting portion 5b.
The connecting portion 5 b is a toggle mechanism that connects the upper fixing portion 2 and the die plate 5. The connecting portion 5b is configured to expand and contract in the vertical direction by an actuator such as a hydraulic cylinder so that the die plate 5 can be moved in the vertical direction.
In addition, it is also possible not to provide the connection part 5b in the multistage press apparatus 1, but to comprise the die plate 5 so that it can move to an up-down direction directly with actuators, such as a hydraulic cylinder.
　ダイホルダ６・６は、矩形状の板材であり、その板面を上下方向に向けて配置されている。ダイホルダ６・６は、下固定部３とダイプレート５との間に配置されている。ダイホルダ６・６は、左右から中間型３０を挟持した状態で、中間型３０に固定されている。
　左側のダイホルダ６は、左側のガイドポスト４・４上を摺動可能に構成され、右側のダイホルダ６は、右側のガイドポスト４・４上を摺動可能に構成されており、ダイホルダ６・６に取り付けられた中間型３０が上下方向に移動可能となっている。
　詳細には、左側のダイホルダ６には、左側のガイドポスト４・４を挿通させるための二つの貫通孔が上下方向に沿って形成され、右側のダイホルダ６には、右側のガイドポスト４・４を挿通させるための二つの貫通孔が上下方向に沿って形成されており、それらの四つの貫通孔には、ガイドポスト４・４・４・４の外周面を覆うように形成された摺動部６ａ・６ａ・６ａ・６ａが固定されている。
　摺動部６ａは、摺動部５ａと略同様に構成された円筒状の部材であり、ガイドポスト４上を摺動可能に構成されている。 The die holders 6 and 6 are rectangular plate materials, and the plate surfaces thereof are arranged in the vertical direction. The die holders 6 and 6 are disposed between the lower fixing portion 3 and the die plate 5. The die holders 6 and 6 are fixed to the intermediate mold 30 with the intermediate mold 30 sandwiched from the left and right.
The left die holder 6 is configured to be slidable on the left guide post 4, 4, and the right die holder 6 is configured to be slidable on the right guide post 4, 4. The intermediate die 30 attached to the can be moved in the vertical direction.
Specifically, the left die holder 6 is formed with two through-holes through which the left guide posts 4 and 4 are inserted, and the right die holder 6 has the right guide posts 4 and 4. Two through holes for inserting the guide posts 4, 4, 4, 4 are formed in the four through holes so as to cover the outer peripheral surfaces of the guide posts 4, 4, 4, 4. The parts 6a, 6a, 6a and 6a are fixed.
The sliding portion 6a is a cylindrical member configured in substantially the same manner as the sliding portion 5a, and is configured to be slidable on the guide post 4.
　次に、上型１０、下型２０、及び中間型３０について説明する。
　上型１０、下型２０、及び中間型３０は、上方から上型１０、中間型３０、下型２０の順に、鉛直方向に沿って配置され、ワークを加工するための加工部を二つ構成している。
　下型２０及び中間型３０から構成される加工部において、ワークに絞り加工が施されると同時に、上型１０及び中間型３０から構成される加工部において、ワークに曲げ加工が施される。なお、上型１０及び中間型３０によって曲げ加工が施されるワークは、下型２０及び中間型３０によって絞り加工が施されたワークである。
　このように、上型１０、下型２０、及び中間型３０は、二種類のワークに対して同時にプレス加工を施すように構成されている。 Next, the upper mold 10, the lower mold 20, and the intermediate mold 30 will be described.
The upper mold 10, the lower mold 20, and the intermediate mold 30 are arranged along the vertical direction from the upper mold 10, the intermediate mold 30, and the lower mold 20 in this order, and constitute two processing parts for processing the workpiece. is doing.
In the processing part composed of the lower mold 20 and the intermediate mold 30, the work is drawn, and at the same time, the work is bent in the processing part composed of the upper mold 10 and the intermediate mold 30. The workpiece that is bent by the upper die 10 and the intermediate die 30 is a workpiece that has been drawn by the lower die 20 and the intermediate die 30.
Thus, the upper mold | type 10, the lower mold | type 20, and the intermediate mold | type 30 are comprised so that a press work may be simultaneously performed with respect to two types of workpiece | work.
　上型１０は、下面に成形面が形成された金型であり、ダイプレート５の下面に固定されている。
　上型１０は、上型本体１１と、パッド１２とを具備し、上型本体１１の成形面１１ａと、パッド１２の成形面１２ａとが上型１０の成形面を構成している。
　上型本体１１は、上型１０の主たる構成部材である。上型本体１１の左右方向における中央部には、上方に向けて窪んだ凹部が形成されており、当該凹部にパッド１２が設けられている。
　パッド１２は、上型本体１１に形成された凹部に、上下方向に移動可能に設けられている。パッド１２は、所定の付勢手段により下方に付勢されており、上型１０及び中間型３０によってワークに曲げ加工が施される際に、当該ワークの左右方向における中央部分を中間型３０と共に挟み込んで拘束する。 The upper mold 10 is a mold having a molding surface formed on the lower surface, and is fixed to the lower surface of the die plate 5.
The upper mold 10 includes an upper mold body 11 and a pad 12, and a molding surface 11 a of the upper mold body 11 and a molding surface 12 a of the pad 12 constitute a molding surface of the upper mold 10.
The upper mold body 11 is a main component of the upper mold 10. A concave portion that is recessed upward is formed in a central portion in the left-right direction of the upper mold main body 11, and a pad 12 is provided in the concave portion.
The pad 12 is provided in a recess formed in the upper mold main body 11 so as to be movable in the vertical direction. The pad 12 is urged downward by a predetermined urging means, and when the workpiece is bent by the upper die 10 and the intermediate die 30, the central portion in the left-right direction of the workpiece is combined with the intermediate die 30. Hold and restrain.
　下型２０は、上面に成形面が形成された金型であり、下固定部３の上面に固定されている。
　下型２０は、下型本体２１と、クッションリング２２とを具備し、下型本体２１の成形面２１ａと、クッションリング２２の成形面２２ａとが下型２０の成形面を構成している。
　下型本体２１は、下型２０の主たる構成部材であり、左右方向における中央部分に成形面２１ａが形成されている。下型本体２１には、下方に向けて窪んだ凹部が成形面２１ａを囲むように形成されており、当該凹部にクッションリング２２が設けられている。
　クッションリング２２は、下型本体２１に形成された凹部に、上下方向に移動可能に設けられている。クッションリング２２は、所定の付勢手段により上方に付勢されており、下型２０及び中間型３０によってワークに絞り加工が施される際に、当該ワークの外縁部分を中間型３０と共に挟み込んで拘束する。 The lower mold 20 is a mold having a molding surface formed on the upper surface, and is fixed to the upper surface of the lower fixing portion 3.
The lower mold 20 includes a lower mold body 21 and a cushion ring 22, and a molding surface 21 a of the lower mold body 21 and a molding surface 22 a of the cushion ring 22 constitute a molding surface of the lower mold 20.
The lower mold body 21 is a main component of the lower mold 20, and a molding surface 21a is formed at a central portion in the left-right direction. The lower mold main body 21 is formed with a recess recessed downward so as to surround the molding surface 21a, and a cushion ring 22 is provided in the recess.
The cushion ring 22 is provided in a recess formed in the lower mold main body 21 so as to be movable in the vertical direction. The cushion ring 22 is biased upward by a predetermined biasing means, and when the workpiece is drawn by the lower die 20 and the intermediate die 30, the outer edge portion of the workpiece is sandwiched with the intermediate die 30. to bound.
　中間型３０は、フルモールド鋳造法等により、一部材として作製された金型である。中間型３０の上面及び下面には、それぞれ上側成形面３１及び下側成形面３２が形成されている。
　中間型３０の上側成形面３１は、上型１０の成形面（上型本体１１の成形面１１ａ、及びパッド１２の成形面１２ａ）の形状に合わせて形成され、中間型３０の下側成形面３２は、下型２０の成形面（下型本体２１の成形面２１ａ、及びクッションリング２２の成形面２２ａ）の形状に合わせて形成されている。
　このように、中間型３０は、一部材にて構成され、上面及び下面にそれぞれ上側成形面３１及び下側成形面３２が形成されている。
　更に、中間型３０は、ダイプレートを用いることなく、ダイホルダ６・６によって側方（本実施形態においては、左右）から挟持されるように構成されている。つまり、中間型３０は、ダイホルダ６・６を介して上下方向に移動可能となっている。
　これにより、上型及び下型をそれぞれダイプレートの上下面に固定することによって構成された従来の中間型と比較して、中間型３０の高さ（鉛直方向の長さ）を小さくすることができる。したがって、多段プレス装置１の小型化を実現できる。
　なお、中間型３０における上側成形面３１及び下側成形面３２が形成されていない部分は、上側成形面３１より上方に突出し、かつ、下側成形面３２よりも下方に突出するように形成されている。 The intermediate mold 30 is a mold manufactured as one member by a full mold casting method or the like. An upper molding surface 31 and a lower molding surface 32 are formed on the upper surface and the lower surface of the intermediate mold 30, respectively.
The upper molding surface 31 of the intermediate mold 30 is formed according to the shape of the molding surface of the upper mold 10 (the molding surface 11a of the upper mold body 11 and the molding surface 12a of the pad 12). 32 is formed according to the shape of the molding surface of the lower mold 20 (the molding surface 21a of the lower mold body 21 and the molding surface 22a of the cushion ring 22).
As described above, the intermediate mold 30 is constituted by one member, and the upper molding surface 31 and the lower molding surface 32 are formed on the upper surface and the lower surface, respectively.
Further, the intermediate die 30 is configured to be sandwiched from the side (in the present embodiment, left and right) by the die holders 6 and 6 without using a die plate. That is, the intermediate mold 30 is movable in the vertical direction via the die holders 6 and 6.
Accordingly, the height (vertical length) of the intermediate mold 30 can be reduced as compared with the conventional intermediate mold configured by fixing the upper mold and the lower mold to the upper and lower surfaces of the die plate. it can. Therefore, it is possible to reduce the size of the multistage press device 1.
A portion of the intermediate mold 30 where the upper molding surface 31 and the lower molding surface 32 are not formed is formed so as to project upward from the upper molding surface 31 and project downward from the lower molding surface 32. ing.
　なお、本実施形態においては、中間型３０全体を一部材として構成したが、少なくとも上側成形面３１及び下側成形面３２が形成された部分が一部材として構成されていればよい。
　また、本実施形態においては、一つの中間型が設けられているが、中間型の数は限定するものではなく、少なくとも一つの中間型が設けられていれば良い。 In the present embodiment, the entire intermediate mold 30 is configured as one member, but at least a portion where the upper molding surface 31 and the lower molding surface 32 are formed may be configured as one member.
In the present embodiment, one intermediate mold is provided. However, the number of intermediate molds is not limited, and it is sufficient that at least one intermediate mold is provided.
　以下では、図２～図７を参照して、本発明に係る多段プレス装置に含まれる中間型の製造方法の一実施形態である、中間型３０の製造工程Ｓ１について説明する。
　製造工程Ｓ１は、フルモールド鋳造法により、中間型３０を作製する工程である。
　ここで、フルモールド鋳造法とは、溶湯の熱により消失する模型を砂の中に埋め込み、当該模型と溶湯とを置換することで、模型と同形状の鋳物を作製する鋳造方法である。 Hereinafter, with reference to FIG. 2 to FIG. 7, the manufacturing process S1 of the intermediate mold 30 which is an embodiment of the method of manufacturing the intermediate mold included in the multistage press apparatus according to the present invention will be described.
The manufacturing process S1 is a process for manufacturing the intermediate mold 30 by a full mold casting method.
Here, the full mold casting method is a casting method for producing a casting having the same shape as the model by embedding a model that disappears by the heat of the molten metal in sand and replacing the model with the molten metal.
　図２に示すように、製造工程Ｓ１は、補強工程Ｓ１１と、収納工程Ｓ１２と、第一砂込め工程Ｓ１３と、第二砂込め工程Ｓ１４と、注湯工程Ｓ１５とを具備し、これらの工程を順に行う。 As shown in FIG. 2, the production process S1 includes a reinforcement process S11, a storage process S12, a first sand filling process S13, a second sand filling process S14, and a pouring process S15. Repeat in order.
　図３に示すように、補強工程Ｓ１１は、消失模型４０を補強部材５０によって補強する工程である。
　消失模型４０は、フルモールド鋳造法にて一般的に用いられる、発泡スチロール製の模型であり、中間型３０と略同様の形状に形成されている。消失模型４０において、中間型３０の上側成形面３１に対応する面を第一面４１とし、中間型３０の下側成形面３２に対応する面を第二面４２とする。
　補強部材５０は、消失模型４０における第一面４１及び第二面４２が形成された部分を支持することによって、消失模型４０を補強する発泡スチロール製の部材である。補強部材５０は、第一面４１が下側に位置し、かつ、第二面４２が上側に位置するように消失模型４０を所定の場所に載置した際に、当該載置面と第一面４１との間に形成される空隙を完全に埋めることによって、消失模型４０を補強する（図４参照）。つまり、補強部材５０は、前記空隙と同形状に形成されている。補強部材５０は、中間型３０のＣＡＤデータ等に基づいて作製することが可能である。
　なお、補強部材５０の素材は、消失模型４０を補強することができれば、その種類は限定しない。 As shown in FIG. 3, the reinforcing step S <b> 11 is a step of reinforcing the disappearance model 40 with the reinforcing member 50.
The vanishing model 40 is a polystyrene model generally used in a full mold casting method, and is formed in a shape substantially the same as that of the intermediate mold 30. In the vanishing model 40, a surface corresponding to the upper molding surface 31 of the intermediate mold 30 is a first surface 41, and a surface corresponding to the lower molding surface 32 of the intermediate mold 30 is a second surface 42.
The reinforcing member 50 is a foamed polystyrene member that reinforces the disappearance model 40 by supporting a portion of the disappearance model 40 where the first surface 41 and the second surface 42 are formed. When the vanishing model 40 is placed at a predetermined location such that the first surface 41 is located on the lower side and the second surface 42 is located on the upper side, the reinforcing member 50 The vanishing model 40 is reinforced by completely filling the gap formed between the surface 41 (see FIG. 4). That is, the reinforcing member 50 is formed in the same shape as the gap. The reinforcing member 50 can be manufactured based on CAD data of the intermediate mold 30 or the like.
The material of the reinforcing member 50 is not limited as long as the disappearance model 40 can be reinforced.
　補強工程Ｓ１１においては、前記空隙を埋めるように、消失模型４０に補強部材５０を取り付け、消失模型４０を補強する。 In the reinforcing step S11, the reinforcing member 50 is attached to the vanishing model 40 so as to fill the gap, and the vanishing model 40 is reinforced.
　図４に示すように、収納工程Ｓ１２は、補強工程Ｓ１１にて、補強部材５０によって補強された消失模型４０を鋳枠６０内に収納する工程である。
　鋳枠６０は、フルモールド鋳造法にて一般的に用いられる箱状の鋳枠である。鋳枠６０は、上下面が開放された略直方体状の本体部６１と、本体部６１の一方の開放部分を閉塞する蓋部６２とを具備する。
　本体部６１は、鉛直方向に複数積み上げることが可能であり、収納工程Ｓ１２が行われる際には、二つの本体部６１・６１が積み上げられる。
　蓋部６２は、積み上げられた二つの本体部６１・６１における下方の開放部分を閉塞するように配置されている。蓋部６２は、下側の本体部６１に固定されておらず、当該本体部６１の下面の開放と閉塞とを容易に切り替えることが可能である。 As shown in FIG. 4, the storing step S <b> 12 is a step of storing the disappearance model 40 reinforced by the reinforcing member 50 in the reinforcing step S <b> 11 in the casting frame 60.
The casting frame 60 is a box-shaped casting frame generally used in a full mold casting method. The cast frame 60 includes a substantially rectangular parallelepiped main body portion 61 whose upper and lower surfaces are open, and a lid portion 62 that closes one open portion of the main body portion 61.
A plurality of main body portions 61 can be stacked in the vertical direction, and when the storing step S12 is performed, the two main body portions 61 and 61 are stacked.
The lid part 62 is disposed so as to close the lower open part of the two stacked main body parts 61 and 61. The lid 62 is not fixed to the lower main body 61 and can be easily switched between opening and closing of the lower surface of the main body 61.
　収納工程Ｓ１２においては、第一面４１及び第二面４２が鉛直方向に沿って位置するように消失模型４０を鋳枠６０内に収納する。
　詳細には、補強部材５０によって補強された消失模型４０を、第一面４１が下側に位置し、かつ、第二面４２が上側に位置するように、鋳枠６０の蓋部６２の上面に載置する。
　この時、鋳枠６０の蓋部６２の上面と、第一面４１との間に形成される空隙が補強部材５０によって埋められた状態となっている。
　また、積み上げられた二つの本体部６１・６１の上端面は、消失模型４０の上端面よりも上方に位置した状態となっている。 In the storing step S12, the disappearance model 40 is stored in the casting frame 60 so that the first surface 41 and the second surface 42 are positioned along the vertical direction.
Specifically, the vanishing model 40 reinforced by the reinforcing member 50 is arranged such that the upper surface of the lid portion 62 of the casting frame 60 such that the first surface 41 is located on the lower side and the second surface 42 is located on the upper side. Placed on.
At this time, a gap formed between the upper surface of the lid portion 62 of the casting frame 60 and the first surface 41 is filled with the reinforcing member 50.
Further, the upper end surfaces of the two stacked main body portions 61 and 61 are positioned above the upper end surface of the vanishing model 40.
　図５に示すように、第一砂込め工程Ｓ１３は、収納工程Ｓ１２にて消失模型４０が収納された鋳枠６０の内部に、鋳物砂７０を投入する工程である。
　鋳物砂７０は、フルモールド鋳造法にて一般的に用いられる鋳物砂であり、鋳型として機能する。鋳物砂７０は、珪砂等の砂に樹脂等が添加されたものであり、鋳枠６０の内部への投入後、所定時間が経過することで硬化する。 As shown in FIG. 5, the first sand filling step S <b> 13 is a step of putting the foundry sand 70 into the inside of the casting frame 60 in which the lost model 40 is accommodated in the accommodating step S <b> 12.
The foundry sand 70 is foundry sand generally used in the full mold casting method, and functions as a mold. The foundry sand 70 is obtained by adding a resin or the like to sand such as silica sand, and is hardened when a predetermined time elapses after being put into the casting frame 60.
　第一砂込め工程Ｓ１３においては、補強部材５０によって補強された消失模型４０が鋳物砂７０に埋まるように、鋳物砂７０を鋳枠６０内に投入する。
　詳細には、鋳物砂７０が全体的に、積み上げられた二つの本体部６１・６１の上端面の高さ（鉛直方向における位置）に達するまで、鋳物砂７０を鋳枠６０内に投入する。
　この時、消失模型４０が補強部材５０によって補強されているため、消失模型４０における第一面４１及び第二面４２が形成された部分に、鋳物砂７０の重みによる撓み、又は破損等が生じることを防止することができる。
　これにより、消失模型４０における第一面４１及び第二面４２が形成された部分の厚み（第一面４１から第二面４２までの距離）を小さくすることができ、延いては消失模型４０の高さ（鉛直方向の長さ）を小さくすることができる。
　したがって、消失模型４０に基づいて作製される中間型３０の高さを小さくすることができる。 In the first sand filling step S <b> 13, the foundry sand 70 is put into the casting frame 60 so that the disappeared model 40 reinforced by the reinforcing member 50 is buried in the foundry sand 70.
More specifically, the foundry sand 70 is put into the casting frame 60 until the foundry sand 70 reaches the height (position in the vertical direction) of the upper end surfaces of the two stacked main body portions 61 and 61 as a whole.
At this time, since the vanishing model 40 is reinforced by the reinforcing member 50, the portion of the vanishing model 40 where the first surface 41 and the second surface 42 are formed is bent or damaged by the weight of the foundry sand 70. This can be prevented.
Thereby, the thickness (distance from the 1st surface 41 to the 2nd surface 42) of the part in which the 1st surface 41 and the 2nd surface 42 in the vanishing model 40 were formed can be made small, and the vanishing model 40 is extended. The height (vertical length) can be reduced.
Therefore, the height of the intermediate mold 30 produced based on the disappearance model 40 can be reduced.
　また、第一砂込め工程Ｓ１３においては、溶湯を注入するための注湯口７１が形成されるように、鋳物砂７０を鋳枠６０内に投入する。
　注湯口７１は、消失模型４０に円筒状の部材を差し込んだ状態で、鋳物砂７０を鋳枠６０内に投入すること等により形成することが可能である。 In the first sand filling step S <b> 13, the foundry sand 70 is poured into the casting frame 60 so that a pouring port 71 for pouring the molten metal is formed.
The pouring port 71 can be formed by, for example, throwing the foundry sand 70 into the casting frame 60 with a cylindrical member inserted into the disappearance model 40.
　図６に示すように、第二砂込め工程Ｓ１４は、第一砂込め工程Ｓ１３にて鋳物砂７０が投入された鋳枠６０を上下反転させ、鋳枠６０内に新たに鋳物砂７０を投入する工程である。
　第二砂込め工程Ｓ１４においては、まず、第一砂込め工程Ｓ１３にて鋳枠６０内に投入された鋳物砂７０が硬化した状態で、鋳枠６０を上下反転させる。
　次に、鋳枠６０の蓋部６２を取り除いた後、消失模型４０から補強部材５０を取り除く。
　最後に、積み上げられた二つの本体部６１・６１に更に一つの本体部６１を積み上げた後、消失模型４０が鋳物砂７０に完全に埋まるように、新たに鋳物砂７０を鋳枠６０内（詳細には、新たに追加された本体部６１内）に投入する。
　こうして、鋳枠６０内（詳細には、積み上げられた三つの本体部６１・６１・６１内）に投入された鋳物砂７０に消失模型４０が完全に埋まった状態となる。第二砂込め工程Ｓ１４にて鋳枠６０の内部に投入された鋳物砂７０は、鋳枠６０の内部への投入後、所定時間が経過することで硬化する。 As shown in FIG. 6, in the second sand filling step S <b> 14, the casting frame 60 into which the casting sand 70 has been put in the first sand filling step S <b> 13 is turned upside down, and the casting sand 70 is newly put into the casting frame 60. It is a process to do.
In the second sand filling step S14, first, the casting frame 60 is turned upside down in a state where the foundry sand 70 put into the casting frame 60 in the first sand filling step S13 is cured.
Next, after removing the lid 62 of the casting frame 60, the reinforcing member 50 is removed from the disappearance model 40.
Finally, after one body portion 61 is further stacked on the two stacked body portions 61 and 61, the foundry sand 70 is newly placed in the casting frame 60 so that the disappeared model 40 is completely buried in the foundry sand 70 ( Specifically, it is put into the newly added main body 61).
In this way, the disappearance model 40 is completely buried in the foundry sand 70 put in the casting frame 60 (specifically, the three main body portions 61, 61, 61 stacked). The foundry sand 70 introduced into the inside of the casting frame 60 in the second sand filling step S <b> 14 is cured when a predetermined time elapses after being introduced into the casting frame 60.
　注湯工程Ｓ１５は、第二砂込め工程Ｓ１４にて鋳物砂７０が投入された鋳枠６０内の消失模型４０に対して溶湯を供給する工程である。
　注湯工程Ｓ１５においては、鋳枠６０内に投入された鋳物砂７０が硬化した後に、注湯口７１に高温の溶湯を注入することで、溶湯が消失模型４０まで到達する。そして、溶湯の熱により消失模型４０が消失し、消失模型４０が存在していた空間が溶湯で満たされることとなる。つまり、消失模型４０が溶湯に置き換わることとなる。
　その後、凝固した溶湯を鋳物砂７０内から取り出し、所定の加工を施すことによって中間型３０が完成する。 The pouring step S15 is a step of supplying molten metal to the disappeared model 40 in the casting frame 60 into which the foundry sand 70 has been introduced in the second sand filling step S14.
In the pouring step S <b> 15, the molten sand reaches the disappearance model 40 by injecting a high-temperature molten metal into the pouring port 71 after the foundry sand 70 put in the casting frame 60 is hardened. And the disappearance model 40 lose | disappears with the heat | fever of a molten metal, and the space where the disappearance model 40 existed will be filled with a molten metal. That is, the disappearance model 40 is replaced with molten metal.
Thereafter, the solidified molten metal is taken out from the foundry sand 70 and subjected to predetermined processing, whereby the intermediate mold 30 is completed.
　なお、本発明における補強部材は、前記空隙を埋めるように構成された補強部材５０に限定せず、以下のような補強部材１５０を適用することも可能である。 In addition, the reinforcing member in the present invention is not limited to the reinforcing member 50 configured to fill the gap, and the following reinforcing member 150 may be applied.
　図７に示すように、補強部材１５０は、補強部材５０と同様に、前記空隙に配置され、消失模型４０における第一面４１及び第二面４２が形成された部分を支持することによって、消失模型４０を補強する部材である。補強部材１５０は、複数の上方当接部１５１・１５１・・・と、複数の側方当接部１５２・１５２・・・とを具備する。 As shown in FIG. 7, the reinforcing member 150 is disposed in the gap, like the reinforcing member 50, and disappears by supporting the portion where the first surface 41 and the second surface 42 of the disappearance model 40 are formed. It is a member that reinforces the model 40. The reinforcing member 150 includes a plurality of upper contact portions 151, 151... And a plurality of side contact portions 152, 152.
　上方当接部１５１は、上方に向けて突出し、突出端面（図７におけるハッチングパターン部分参照）が平坦面として形成されている。上方当接部１５１は、その突出端面が消失模型４０における第一面４１の平坦部分に当接するように、当該平坦部分の位置に合わせて複数形成されている。
　ここで、消失模型４０における第一面４１の平坦部分とは、例えば、中間型３０の上側成形面３１における、ワークの最終的に製品とならない部分（後に取り除かれる部分）を加工するための面に対応する部分である。中間型３０において、ワークの最終的に製品となる部分を加工するための成形面は、主に曲面として形成されているが、ワークの最終的に製品とならない部分を加工するための成形面は、主に平坦面として形成されている。
　そこで、複雑な形状の曲面部分ではなく、中間型３０における上側成形面３１の平坦部分に対応する、消失模型４０における第一面４１の平坦部分を利用し、当該平坦部分に当接する平坦面を有する上方当接部１５１を補強部材１５０に形成する。
　こうして、比較的簡易な構造の複数の上方当接部１５１・１５１・・・を補強部材１５０に設けることで、消失模型４０における第一面４１及び第二面４２が形成された部分の形状が保持され、消失模型４０を補強することができる。
　また、消失模型４０における第一面４１の平坦部分と、補強部材１５０における上方当接部１５１の平坦面（突出端面）が良好に当接していない場合であっても、上方当接部１５１が簡易な構造である、つまり消失模型４０における第一面４１の平坦部分の形状に合わせて、上方当接部１５１の突出端面の形状も平坦であるため、上方当接部１５１を容易に修正することが可能である。 The upper contact portion 151 protrudes upward, and a protruding end surface (see the hatched pattern portion in FIG. 7) is formed as a flat surface. A plurality of upper abutting portions 151 are formed in accordance with the position of the flat portion so that the protruding end surface abuts on the flat portion of the first surface 41 of the disappearance model 40.
Here, the flat portion of the first surface 41 in the disappearance model 40 is, for example, a surface for processing a portion of the upper molding surface 31 of the intermediate die 30 that will not eventually become a product (a portion to be removed later). It is a part corresponding to. In the intermediate mold 30, the molding surface for processing a part that finally becomes a product of the workpiece is mainly formed as a curved surface, but the molding surface for processing a part that does not finally become a product of the workpiece is , Mainly formed as a flat surface.
Therefore, using the flat portion of the first surface 41 of the disappearance model 40 corresponding to the flat portion of the upper molding surface 31 of the intermediate mold 30 instead of the curved surface portion of a complicated shape, a flat surface that contacts the flat portion is used. The upper abutting portion 151 having the reinforcing member 150 is formed.
In this way, by providing the reinforcing member 150 with a plurality of upper contact portions 151, 151,... Having a relatively simple structure, the shape of the portion where the first surface 41 and the second surface 42 of the disappearance model 40 are formed. The disappeared model 40 can be reinforced.
Even if the flat portion of the first surface 41 of the disappearance model 40 and the flat surface (projecting end surface) of the upper contact portion 151 of the reinforcing member 150 are not in good contact, the upper contact portion 151 is not Since the shape of the protruding end surface of the upper contact portion 151 is also flat according to the shape of the simple structure, that is, the shape of the flat portion of the first surface 41 in the disappearance model 40, the upper contact portion 151 is easily corrected. It is possible.
　なお、上方当接部１５１は、補強部材１５０において、ある程度均等な配置となるように複数個設けることが好ましいが、上方当接部１５１を設けることが困難な場所には、消失模型４０における第一面４１の曲面部分に当接する上方当接部１５１ａを設ければよい。
　上方当接部１５１ａは、消失模型４０における第一面４１の曲面部分の形状に沿って形成されている（図７における黒塗り部分参照）。消失模型４０における第一面４１の曲面部分は複雑な形状であるため、上方当接部１５１ａは、できる限り補強部材１５０に設けないことが望ましい。 Note that a plurality of upper contact portions 151 are preferably provided in the reinforcing member 150 so as to be arranged to some extent evenly. What is necessary is just to provide the upper contact part 151a contact | abutted to the curved surface part of the one surface 41. FIG.
The upper contact portion 151a is formed along the shape of the curved surface portion of the first surface 41 of the disappearance model 40 (see the black portion in FIG. 7). Since the curved surface portion of the first surface 41 of the disappearance model 40 has a complicated shape, it is desirable that the upper contact portion 151a is not provided on the reinforcing member 150 as much as possible.
　側方当接部１５２は、側方（鉛直方向に直交する方向）に向けて突出し、突出端面が平坦面として形成されている。側方当接部１５２は、その突出端面が消失模型４０における、前記空隙を形成する面のうちの鉛直方向に沿った面の平坦部分に当接するように、当該平坦部分の位置に合わせて複数形成されている。
　こうして、鉛直方向に直交する方向においても、消失模型４０の平坦部分を利用し、当該平坦部分に当接する側方当接部１５２を補強部材１５０に形成することで、消失模型４０の形状が保持され、消失模型４０を更に補強することできる。 The side contact portion 152 protrudes toward the side (direction perpendicular to the vertical direction), and the protruding end surface is formed as a flat surface. The side abutment portion 152 has a plurality of projection end faces in contact with the flat portion of the surface along the vertical direction of the surface forming the gap in the disappearance model 40 according to the position of the flat portion. Is formed.
Thus, even in the direction perpendicular to the vertical direction, the shape of the disappearance model 40 is maintained by using the flat portion of the disappearance model 40 and forming the side contact portion 152 that contacts the flat portion on the reinforcing member 150. The vanishing model 40 can be further reinforced.
　このように、上方当接部１５１及び側方当接部１５２は、消失模型４０における、前記空隙を形成する面の平坦部分に当接するような平坦面が形成されるように構成されている。
　これにより、補強部材１５０を比較的簡易な構成とし、容易に消失模型４０を補強することできる。 As described above, the upper contact portion 151 and the side contact portion 152 are configured such that a flat surface is formed so as to contact the flat portion of the surface forming the gap in the disappearance model 40.
Thereby, the reinforcing member 150 can have a relatively simple configuration, and the disappearance model 40 can be easily reinforced.
　なお、補強部材１５０を複数に分割することも可能である。補強部材１５０を分割することにより、その分割片ごとに、上方当接部１５１及び側方当接部１５２と、消失模型４０とが適切に接触しているかを容易に確認することができる。 Note that the reinforcing member 150 can be divided into a plurality of parts. By dividing the reinforcing member 150, it is possible to easily confirm whether the upper contact portion 151 and the side contact portion 152 and the disappearance model 40 are in proper contact for each divided piece.
　本発明は、複数のワークに対して同時にプレス加工を行う多段プレス装置、及びそれに含まれる中間型の製造方法に利用できる。 The present invention can be used for a multi-stage press apparatus that simultaneously presses a plurality of workpieces, and an intermediate mold manufacturing method included therein.
　１　　　多段プレス装置
　１０　　上型
　２０　　下型
　３０　　中間型
　３１　　上側成形面
　３２　　下側成形面
　４０　　消失模型
　４１　　第一面
　４２　　第二面
　５０　　補強部材
　６０　　鋳枠
　６１　　本体部
　６２　　蓋部
　７０　　鋳物砂
　７１　　注湯口
　１５０　補強部材
　１５１　上方当接部
　１５２　側方当接部 DESCRIPTION OF SYMBOLS 1 Multistage press apparatus 10 Upper mold | type 20 Lower mold | type 30 Intermediate mold 31 Upper molding surface 32 Lower molding surface 40 Vanishing model 41 1st surface 42 2nd surface 50 Reinforcement member 60 Cast frame 61 Main body part 62 Lid part 70 Foundry sand 71 Notes Pouring gate 150 Reinforcing member 151 Upper contact portion 152 Side contact portion

Claims (4)

  1. 　複数のワークに対して同時にプレス加工を行う多段プレス装置であって、
    　下面に成形面が形成される上型と、上面に成形面が形成される下型と、当該上型と下型との間に配置される、少なくとも一つの中間型と、を具備し、
    　前記中間型は、上面及び下面にそれぞれ成形面が形成され、
    　前記中間型における二つの成形面が形成される部分は、一部材にて構成される、
    　ことを特徴とする多段プレス装置。     A multi-stage press device that performs press processing simultaneously on a plurality of workpieces,
    An upper mold having a molding surface formed on the lower surface, a lower mold having a molding surface formed on the upper surface, and at least one intermediate mold disposed between the upper mold and the lower mold,
    The intermediate mold is formed with molding surfaces on the upper surface and the lower surface, respectively.
    The portion where the two molding surfaces in the intermediate mold are formed is constituted by one member.
    A multi-stage press device characterized by that.
  2. 　請求項１に記載の多段プレス装置に含まれる中間型の製造方法であって、
    　前記中間型と同形状に形成された模型における、前記中間型の二つの成形面に対応する面が形成された部分を支持する補強部材によって、前記模型を補強する補強工程と、
    　前記補強工程にて補強された模型を、当該模型における、前記中間型の二つの成形面に対応する面が鉛直方向に沿って位置するように、箱状の鋳枠の内部に収納する収納工程と、
    　前記収納工程にて前記模型が収納された鋳枠の内部に、鋳型として機能する鋳物砂を投入する第一砂込め工程と、
    　前記第一砂込め工程にて前記鋳物砂が投入された鋳枠を上下反転し、前記模型から前記補強部材を取り除いた後、反転された鋳枠の内部に前記鋳物砂を投入する第二砂込め工程と、
    　前記第二砂込め工程にて前記鋳物砂が投入された鋳枠内の模型に対して溶湯を供給する注湯工程と、を具備する、
    　ことを特徴とする中間型の製造方法。     A method for producing an intermediate mold included in the multistage press device according to claim 1,
    In the model formed in the same shape as the intermediate mold, a reinforcing step for reinforcing the model by a reinforcing member that supports a portion in which a surface corresponding to two molding surfaces of the intermediate mold is formed;
    A storing step of storing the model reinforced in the reinforcing step inside the box-shaped casting frame so that surfaces corresponding to the two molding surfaces of the intermediate mold in the model are positioned along the vertical direction. When,
    A first sanding step of putting casting sand that functions as a mold into the inside of the casting frame in which the model is stored in the storing step;
    The second sand in which the casting sand into which the casting sand has been thrown in the first sand filling step is turned upside down and the reinforcing member is removed from the model, and then the casting sand is put into the inverted casting frame. Filling process,
    A pouring step of supplying molten metal to the model in the casting frame into which the foundry sand has been charged in the second sand filling step,
    An intermediate mold manufacturing method characterized by the above.
  3. 　前記補強部材は、前記収納工程にて前記鋳枠の内部に収納された前記模型における、前記中間型の一方の成形面に対応する面と、載置面との間に形成される空隙を埋めるように構成される、
    　ことを特徴とする請求項２に記載の中間型の製造方法。     The reinforcing member fills a gap formed between a surface corresponding to one molding surface of the intermediate mold and a mounting surface in the model housed in the casting frame in the housing step. Configured as
    The method for producing an intermediate mold according to claim 2.
  4. 　前記補強部材は、前記収納工程にて前記鋳枠の内部に収納された前記模型における、前記中間型の一方の成形面に対応する面と、載置面との間に形成される空隙に配置され、前記模型における、前記空隙を形成する面の平坦部分に当接する複数の平坦面を有する、
    　ことを特徴とする請求項２に記載の中間型の製造方法。     The reinforcing member is disposed in a gap formed between a surface corresponding to one molding surface of the intermediate mold and a mounting surface in the model housed in the casting frame in the housing step. And having a plurality of flat surfaces in contact with the flat portion of the surface forming the gap in the model,
    The method for producing an intermediate mold according to claim 2.
PCT/JP2011/069631 2011-08-30 2011-08-30 Multistage press device and method for manufacturing intermediate mold included therein WO2013030957A1 (en)

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