JP2011011216A - Apparatus for blowing casting sand and method for blowing the same - Google Patents

Apparatus for blowing casting sand and method for blowing the same Download PDF

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JP2011011216A
JP2011011216A JP2009155653A JP2009155653A JP2011011216A JP 2011011216 A JP2011011216 A JP 2011011216A JP 2009155653 A JP2009155653 A JP 2009155653A JP 2009155653 A JP2009155653 A JP 2009155653A JP 2011011216 A JP2011011216 A JP 2011011216A
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sand
mold
blowing
foundry sand
cavity
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JP5458698B2 (en
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Daisuke Sakuma
大祐 佐久間
Hiroshi Kawai
宏 河井
Noriyuki Ueno
紀幸 上野
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Toyota Motor Corp
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Toyota Motor Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
    • B22C15/245—Blowing tubes

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for blowing casting sand excellent in versatility and capable of easily coping with different kinds of dies.SOLUTION: The apparatus 10 for blowing the casting sand blows the casting sand into the cavity of the die 1 through a plurality of blowing holes 5, 5, ..., formed at the outer circumferential surface of the die 1 for a sand molding machine and communicating with the cavity of the die 1. The apparatus 10 for blowing the casting sand includes a group of containers including the same number of the containers 11 having a storage part 13 for storing the casting sand therein and a nozzle part 14 capable of jetting the casting sand stored in the storage part 13 and engageable with the blowing hole 5 as that of the blowing holes 5, 5, ..., an air supply device connected with each storage part 13 of each container 11 of the group of the containers and blowing the casting sand in each storage part 13 into the cavity of the die 1 through pressure of air supplied by supplying the air into each storage part 13, and each air hose 12.

Description

本発明は、鋳物砂を砂鋳型造型用の型のキャビティ内に吹き込む技術に関する。   The present invention relates to a technique for blowing foundry sand into a cavity of a mold for sand mold making.

鋳物を製造する際に用いる鋳型として、鋳物砂から造型される砂鋳型がある。砂鋳型の造型は、目的とする砂鋳型と同じ形状のキャビティ面を有する砂鋳型造型用の型（金型）のキャビティ内に鋳物砂が吹き込まれ、さらにこのキャビティ内に吹き込まれた鋳物砂が硬化されることにより行われる。なお、金型の外周面には金型のキャビティに連通する吹き込み口が形成されており、当該吹き込み口からキャビティ内に鋳物砂が吹き込まれる。
従来、図１４（ａ）に示すように、キャビティ内に鋳物砂を吹き込む際に、内部に鋳物砂を収容可能な収容部１１０、及び収容部１１０内の鋳物砂を噴出するノズル部１２０・１２０・・・を有する吹き込み装置１００が用いられている。具体的には、上記各ノズル部１２０と吹き込み口とを係合し、この状態で各ノズル部１２０から収容部１１０内の鋳物砂を噴出することにより、この噴出した鋳物砂がキャビティ内に吹き込まれる（図１４（ｂ）参照）。
一般に、吹き込み口の数や配置位置は、造型対象である砂鋳型の形状等に応じて適宜設定されており、金型の種類毎に異なる。 As a casting mold used for manufacturing a casting, there is a sand casting mold made from casting sand. Sand mold molding is a process in which foundry sand is blown into a cavity of a mold for mold casting (mold) having a cavity surface having the same shape as the target sand mold, and the foundry sand blown into this cavity is This is done by curing. Note that a blowing port communicating with the cavity of the mold is formed on the outer peripheral surface of the mold, and foundry sand is blown into the cavity from the blowing port.
Conventionally, as shown in FIG. 14A, when casting sand is blown into a cavity, a housing part 110 capable of housing the foundry sand, and nozzle parts 120 and 120 for ejecting the foundry sand in the housing part 110. Is used. Specifically, each nozzle part 120 and the blowing port are engaged with each other, and in this state, the foundry sand in the housing part 110 is ejected from each nozzle part 120, so that the ejected foundry sand is blown into the cavity. (See FIG. 14B).
In general, the number and arrangement positions of the blowing ports are appropriately set according to the shape of a sand mold to be molded, and are different for each type of mold.

例えばエンジンのシリンダーヘッドのように、複数の種類の砂鋳型を用いて製造されるものがある（エンジンのシリンダーヘッドで、約１０〜１２種類の砂鋳型が用いられる）。この場合、各砂鋳型を造型するためには、砂鋳型の種類毎に対応する種類の金型がそれぞれ用いられる。
ここで、前述のように金型の種類毎に吹き込み口の数や配置位置が異なるので、例えば吹き込み口の数が三つの金型２００に対しては三つの各ノズル部１２０を有する収容部１１０（図１４（ａ）参照）、吹き込み口の数が二つの金型２１０に対しては二つの各ノズル部１２０を有する収容部１３０（図１５参照）といった具合に、金型の種類毎にノズル部の数や配置位置が適宜設定された専用の吹き込み装置が必要になってくる。
しかし、このように金型の種類毎に専用の吹き込み装置を用意すると、装置の製造コストがかかり、さらに装置の保管スペースについて広いスペースが必要になる点で不利である。従って、実用性を考慮すると、種類の異なる金型に対しても鋳物砂を吹き込むことが可能な装置の方が好ましい。 For example, some cylinder molds are manufactured using a plurality of types of sand molds (about 10 to 12 types of sand molds are used in engine cylinder heads). In this case, in order to mold each sand mold, a type of mold corresponding to each type of sand mold is used.
Here, as described above, since the number and arrangement positions of the blowing ports are different for each type of mold, for example, for the mold 200 having three blowing ports, the accommodating portion 110 having three nozzle portions 120. (See FIG. 14 (a)). For a mold 210 having two injection ports, there is a nozzle 130 for each type of mold, such as a storage section 130 (see FIG. 15) having two nozzle sections 120. A dedicated blowing device in which the number of parts and the arrangement position are appropriately set is required.
However, providing a dedicated blowing device for each type of mold in this way is disadvantageous in that it requires manufacturing costs for the device and requires a large space for storing the device. Therefore, in consideration of practicality, an apparatus capable of blowing foundry sand into different types of molds is preferable.

特許文献１に記載の鋳物砂の吹き込み装置は、複数のノズル部が所定位置に配置されたブロープレート、及び各ノズル部の開閉手段を備える。そして、開閉手段で各ノズル部を適宜開放・閉鎖し、開放したノズル部と金型の吹き込み口とを係合し、さらに開放したノズル部から鋳物砂を噴出し、これによりキャビティ内に鋳物砂を吹き込む。
これによると、各ノズル部を適宜開放・閉鎖することにより鋳物砂が噴出する位置を変更できるので、種類の異なる金型にも対応することが可能になる。
しかし、ブロープレート上に配置された各ノズル部の位置関係を変更できず、予定している複数種類の金型にのみ対応できるように構成しているので、汎用性に劣る点で不利である。
そこで、ブロープレート上に新たにノズル部を設けていくと、対応できる金型の種類を追加することも可能である。しかし、追加対応させる金型の種類毎に、ブロープレート上にノズル部の配置位置を新たに設定していく必要があり、煩雑な作業を要する。 The casting sand blowing device described in Patent Document 1 includes a blow plate in which a plurality of nozzle portions are arranged at predetermined positions, and an opening / closing means for each nozzle portion. Then, each nozzle part is appropriately opened and closed by an opening / closing means, the opened nozzle part and the blowing port of the mold are engaged, and the foundry sand is ejected from the opened nozzle part, whereby the foundry sand is injected into the cavity. Infuse.
According to this, since the position where the foundry sand is ejected can be changed by opening and closing each nozzle part as appropriate, it is possible to cope with different types of molds.
However, it is disadvantageous in that it is inferior in versatility because the positional relationship between the nozzle portions arranged on the blow plate cannot be changed and is configured to be compatible only with a plurality of types of molds that are planned. .
Therefore, if a nozzle part is newly provided on the blow plate, it is possible to add a corresponding mold type. However, it is necessary to newly set the arrangement position of the nozzle portion on the blow plate for each type of die to be additionally supported, and complicated work is required.

特開２０００−１１７３９５号公報JP 2000-117395 A

本発明は、汎用性に優れ、種類の異なる金型に対しても容易に対応することができる鋳物砂の吹き込み装置、及び鋳物砂の吹き込み方法を提供する。   The present invention provides a casting sand blowing apparatus and a casting sand blowing method that are excellent in versatility and can easily cope with different types of molds.

請求項１に記載の鋳物砂の吹き込み装置は、砂鋳型造型用の型の外周面に形成されると共に前記型のキャビティに連通する複数の吹き込み口を通じて、前記型のキャビティ内に鋳物砂を吹き込む鋳物砂の吹き込み装置であって、内部に前記鋳物砂を収容可能な収容部、及び前記収容部内に収容される前記鋳物砂を噴出可能であると共に前記吹き込み口に係合可能な噴出部を有する容器を前記複数の吹き込み口の数と同数備える容器群と、前記容器群の各容器の各収容部に接続され、前記各収容部内に気体を供給することにより、供給した前記気体の気圧で前記各収容部内の鋳物砂を前記型のキャビティ内に吹き込む気体供給手段とを備える。   The casting sand blowing device according to claim 1 is used to blow molding sand into the mold cavity through a plurality of blowing ports that are formed on the outer peripheral surface of the mold for sand mold molding and communicate with the cavity of the mold. A casting sand blowing device, comprising: a housing part capable of housing the foundry sand therein; and a jetting part capable of ejecting the foundry sand housed in the housing part and engageable with the blowing port. A container group provided with the same number of containers as the number of the plurality of blowing ports, and connected to each container of each container of the container group, and by supplying gas into each container, the pressure of the gas supplied Gas supply means for blowing casting sand in each housing portion into the cavity of the mold.

請求項２に記載の鋳物砂の吹き込み装置においては、前記気体供給手段は、前記各収容部内に供給する気体の気圧を前記収容部毎に制御可能である。   In the foundry sand blowing apparatus according to claim 2, the gas supply means can control the pressure of the gas supplied into each of the storage units for each of the storage units.

請求項３に記載の鋳物砂の吹き込み装置においては、前記各収容部の内周面には、前記噴出部に向かって傾斜して、前記噴出部に連なる傾斜部が形成される。   In the foundry sand blowing device according to claim 3, an inclined portion is formed on the inner peripheral surface of each of the accommodating portions, which is inclined toward the ejection portion and continues to the ejection portion.

請求項４に記載の鋳物砂の吹き込み装置は、前記各収容部に接続され、前記鋳物砂の硬化を促進する気体を前記各収容部を通じて前記型のキャビティ内に供給する硬化ガス供給手段を備える。   5. The foundry sand blowing apparatus according to claim 4, further comprising a hardened gas supply means connected to each of the housing portions and for supplying a gas for promoting hardening of the foundry sand into the mold cavity through the respective housing portions. .

請求項５に記載の鋳物砂の吹き込み装置は、砂鋳型造型用の型の外周面に形成されると共に前記型のキャビティに連通する複数の吹き込み口を通じて、前記型のキャビティ内に鋳物砂を吹き込む鋳物砂の吹き込み装置であって、内部に前記鋳物砂及び圧縮気体を収容可能な中空形状に形成されると共に、前記吹き込み口に係合可能な開口部を有する収容部と、前記開口部を閉じることにより前記収容部を密封し、前記開口部を開けることにより前記収容部を開封する開閉部と、を有する容器を、前記複数の吹き込み口の数と同数備える。   The foundry sand blowing device according to claim 5 blows the foundry sand into the mold cavity through a plurality of blowing ports formed on the outer peripheral surface of the mold for sand mold molding and communicating with the cavity of the mold. A casting sand blowing device, which is formed in a hollow shape capable of accommodating the foundry sand and compressed gas therein, and has an accommodating portion having an opening engageable with the blowing port, and closes the opening. The container which has the opening-and-closing part which seals the said accommodating part by this and opens the said opening part and opens the said accommodating part is provided with the same number as the said several blowing inlet.

請求項６に記載の鋳物砂の吹き込み装置においては、前記圧縮気体は、前記鋳物砂の硬化を抑制する気体である。   In the foundry sand blowing apparatus according to claim 6, the compressed gas is a gas that suppresses hardening of the foundry sand.

請求項７に記載の鋳物砂の吹き込み装置においては、前記各容器の各収容部の内周面には、前記開口部に向かって傾斜して、前記開口部に連なる傾斜部が形成される。   In the casting sand blowing apparatus according to claim 7, an inclined portion that is inclined toward the opening and is continuous with the opening is formed on the inner peripheral surface of each housing portion of each container.

請求項８に記載の鋳物砂の吹き込み方法は、砂鋳型造型用の型の外周面に形成されると共に前記型のキャビティに連通する複数の吹き込み口を通じて、前記型のキャビティ内に鋳物砂を吹き込む鋳物砂の吹き込み方法であって、内部に前記鋳物砂を収容可能な収容部、及び前記収容部内に収容される前記鋳物砂を噴出可能であると共に前記吹き込み口に係合可能な噴出部を有する容器を前記複数の吹き込み口の数と同数用意して、前記各容器の各収容部内に前記鋳物砂を収容して、前記各容器の各噴出部を前記複数の吹き込み口にそれぞれ係合して、前記各容器の各収容部内に気体を供給することにより、供給した前記気体の気圧で前記各収容部内の鋳物砂を前記型のキャビティ内に吹き込む。   The casting sand blowing method according to claim 8, wherein the molding sand is blown into the cavity of the mold through a plurality of blowing ports formed on the outer peripheral surface of the mold for sand mold molding and communicating with the cavity of the mold. A casting sand blowing method, comprising: a housing part capable of housing the foundry sand therein; and a spraying part capable of ejecting the foundry sand housed in the housing part and engageable with the blowing port. Prepare the same number of containers as the number of the plurality of blowing ports, accommodate the foundry sand in each accommodating portion of each container, and engage each of the ejection portions of each container with the plurality of blowing ports, respectively. By supplying a gas into each accommodating part of each container, the foundry sand in each accommodating part is blown into the cavity of the mold by the pressure of the supplied gas.

請求項９に記載の鋳物砂の吹き込み方法においては、前記各収容部内に供給される気体の気圧は、前記金型のキャビティ内における前記各収容部内の鋳物砂が吹き込まれる部分の各形状に応じて設定される。   In the method for injecting foundry sand according to claim 9, the pressure of the gas supplied into each accommodating portion depends on each shape of the portion into which the foundry sand in each accommodating portion is blown in the cavity of the mold. Is set.

請求項１０に記載の鋳物砂の吹き込み方法においては、前記各収容部内に収容される鋳物砂の種類は、前記金型のキャビティ内における前記各収容部内の鋳物砂が吹き込まれる部分の各形状に応じて設定される。   In the casting sand blowing method according to claim 10, the type of the molding sand accommodated in each of the accommodating portions is each shape of the portion into which the molding sand in each of the accommodating portions is blown in the cavity of the mold. Set accordingly.

請求項１１に記載の鋳物砂の吹き込み方法においては、前記各収容部内に収容される鋳物砂の量は、前記金型のキャビティ内における前記各収容部内の鋳物砂が吹き込まれる部分の各形状に応じて設定される。   In the casting sand blowing method according to claim 11, the amount of the casting sand accommodated in each of the accommodating portions is each shape of the portion into which the casting sand in each of the accommodating portions is blown in the cavity of the mold. Set accordingly.

請求項１２に記載の鋳物砂の吹き込み方法は、砂鋳型造型用の型の外周に形成されると共に前記型のキャビティに連通する複数の吹き込み口を通じて、前記型のキャビティ内に鋳物砂を吹き込む鋳物砂の吹き込み方法であって、内部に前記鋳物砂及び圧縮気体を収容可能な中空形状に形成されると共に、前記吹き込み口に係合可能な開口部を有する収容部と、前記開口部を閉じることにより前記収容部を密封し、前記開口部を開けることにより前記収容部を開封する開閉部と、を有する容器を前記複数の吹き込み口の数と同数用意して、前記各容器の各収容部内に前記鋳物砂及び前記圧縮気体を収容して、前記各開閉部で前記各開口部を閉じることにより前記各収容部を密封して、前記各容器の前記開口部を前記複数の吹き込み口にそれぞれ係合して、前記各開閉部で前記各開口部を開けることにより前記各収容部を開封し、前記各収容部内の圧縮気体の気圧で前記各収容部内の鋳物砂を前記型のキャビティ内に吹き込む。   The casting sand blowing method according to claim 12, wherein the casting sand is blown into the cavity of the mold through a plurality of blowing ports formed on the outer periphery of the mold for sand mold molding and communicating with the cavity of the mold. A sand blowing method, which is formed in a hollow shape capable of accommodating the foundry sand and compressed gas therein, and has an accommodating portion having an opening engageable with the blowing port, and closing the opening. A container having an opening and closing portion for opening the opening by opening the opening and preparing the same number of containers as the number of the plurality of blowing ports. The casting sand and the compressed gas are accommodated, the opening portions are closed by the opening / closing portions, the housing portions are sealed, and the openings of the containers are respectively provided in the plurality of blowing ports. In combination, the respective opening portions are opened by the respective opening / closing portions to open the respective housing portions, and the foundry sand in each of the housing portions is blown into the cavity of the mold by the pressure of the compressed gas in each of the housing portions. .

請求項１３に記載の鋳物砂の吹き込み方法においては、前記各収容部内に収容される圧縮気体の気圧は、前記金型のキャビティ内における前記各収容部内の鋳物砂が吹き込まれる部分の各形状に応じて設定される。   In the molding sand blowing method according to claim 13, the pressure of the compressed gas accommodated in each accommodating portion is set to each shape of the portion into which the molding sand in each accommodating portion is blown in the cavity of the mold. Set accordingly.

請求項１４に記載の鋳物砂の吹き込み方法においては、前記各収容部内に収容される鋳物砂の種類は、前記金型のキャビティ内における前記各収容部内の鋳物砂が吹き込まれる部分の各形状に応じて設定される。   In the casting sand blowing method according to claim 14, the type of the casting sand accommodated in each of the accommodating portions is each shape of the portion into which the casting sand in each of the accommodating portions is blown in the cavity of the mold. Set accordingly.

請求項１５に記載の鋳物砂の吹き込み方法においては、前記各収容部内に収容される鋳物砂の量は、前記金型のキャビティ内における前記各収容部内の鋳物砂が吹き込まれる部分の各形状に応じて設定される。   In the molding sand blowing method according to claim 15, the amount of the molding sand accommodated in each of the accommodating portions is in each shape of the portion into which the molding sand in each of the accommodating portions is blown in the cavity of the mold. Set accordingly.

本発明によれば、汎用性に優れ、種類の異なる金型に対しても容易に対応することができる。   According to the present invention, it is excellent in versatility and can easily cope with different types of molds.

本発明に係る鋳物砂の吹き込み装置の第一実施形態の概略構成図である。It is a schematic block diagram of 1st embodiment of the blowing sand blowing apparatus which concerns on this invention. 鋳物砂吹き込み完了後の金型のキャビティ内を示す図である。It is a figure which shows the inside of the cavity of the metal mold | die after completion of casting sand blowing. 金型のキャビティ内に鋳物砂を吹き込むときの順序を示す図であり、（ａ）は各容器を用意した状態を示し、（ｂ）は各容器のノズルを金型の各吹き込み口に係合した状態を示し、（ｃ）は各容器の収容部に各エアホースを接続した状態を示す。It is a figure which shows the order when casting sand is blown in the cavity of a metal mold | die, (a) shows the state which prepared each container, (b) engages the nozzle of each container with each blowing port of a metal mold | die. (C) shows the state in which each air hose is connected to the accommodating portion of each container. 図３に示す金型とは種類の異なる金型のキャビティ内に鋳物砂を吹き込むときの順序を示す図である。It is a figure which shows the order when casting sand is injected in the cavity of a metal mold | die different from the metal mold | die shown in FIG. 傾斜部を示す図である。It is a figure which shows an inclination part. 本発明に係る鋳物砂の吹き込み装置の第二実施形態の概略構成図である。It is a schematic block diagram of 2nd embodiment of the blowing sand blowing apparatus which concerns on this invention. 鋳物砂吹き込み完了後の金型のキャビティ内を示す図である。It is a figure which shows the inside of the cavity of the metal mold | die after completion of casting sand blowing. 開閉部の一例を示す図であり、（ａ）は開閉部が開口部を閉じた状態を示し、（ｂ）は開閉部が開口部を開けた状態を示す。It is a figure which shows an example of an opening-and-closing part, (a) shows the state which the opening-and-closing part closed the opening part, (b) shows the state which the opening-and-closing part opened the opening part. 治具を上方から見た図である。It is the figure which looked at the jig from the upper part. 開閉部及び治具を示す図であり、（ａ）は図８（ａ）に示す開閉部及び治具の拡大図であり、（ｂ）はその変形例である。It is a figure which shows an opening-and-closing part and a jig | tool, (a) is an enlarged view of the opening-and-closing part and jig | tool shown to Fig.8 (a), (b) is the modification. 開閉部の一例を示す図であり、（ａ）は開閉部が開口部を閉じた状態を示し、（ｂ）は開閉部が開口部を開けた状態を示す。It is a figure which shows an example of an opening-and-closing part, (a) shows the state which the opening-and-closing part closed the opening part, (b) shows the state which the opening-and-closing part opened the opening part. 図１１に示す開閉部を上方から見た図である。It is the figure which looked at the opening-and-closing part shown in Drawing 11 from the upper part. 金型のキャビティ内に鋳物砂を吹き込むときの順序を示す図であり、（ａ）は各容器を用意した状態を示し、（ｂ）は各容器の開口部を金型の各吹き込み口に係合した状態を示す。It is a figure which shows the order at the time of blowing molding sand in the cavity of a metal mold | die, (a) shows the state which prepared each container, (b) relates the opening part of each container to each blower inlet of a metal mold | die. The combined state is shown. 従来の鋳物砂の吹き込み装置を示す図である。It is a figure which shows the conventional blowing apparatus of foundry sand. 従来の鋳物砂の吹き込み装置を示す図である。It is a figure which shows the conventional blowing apparatus of foundry sand.

［第一実施形態］
以下に、本発明に係る鋳物砂の吹き込み装置の第一実施形態である鋳物砂の吹き込み装置１０について、図面を参照して説明する。 [First embodiment]
Hereinafter, a foundry sand blowing apparatus 10 which is a first embodiment of a foundry sand blowing apparatus according to the present invention will be described with reference to the drawings.

吹き込み装置１０は、砂鋳型造型用の型（金型）１のキャビティ内に鋳物砂（砂に粘結剤等を混合したもの）を吹き込む装置である。
吹き込み装置１０が金型１のキャビティ内に鋳物砂を吹き込むことにより、金型１のキャビティの形状に応じた砂鋳型が造型される（図１及び図２参照）。
砂鋳型は、鋳物砂から造型された鋳型である。砂鋳型には、鋳物の外形を成形する外型や、中空部分を含む鋳物を製造するときに用いられ鋳物の内形を成形する中子等がある。
図１に示すように、金型１は、上型２、及び上型２と衝合可能な下型３を有する。そして、上型２と下型３とが衝合された状態にて、金型１内（上型２と下型３との間）にキャビティが形成される。キャビティは、成形の目的とする砂鋳型と同じ形状を有する内部空間であり、成形面となるキャビティ面を有する。
金型１には、鋳物砂を前記キャビティ内に流入するための流路４・４・・・が形成されている。流路４・４・・・の一端は金型１の外周面で開口して吹き込み口５・５・・・をなし、他端は金型１のキャビティに接続されている。つまり、流路４・４・・・は、金型１のキャビティの内外を連通する連通路である。
なお、吹き込み口５・５・・・の数や配置位置、つまり流路４・４・・・の数や配置位置は、造型対象である砂鋳型の形状等に応じて適宜設定されており、金型１の種類毎に異なる。 The blowing device 10 is a device that blows casting sand (a mixture of sand and a binder) into a cavity of a mold (mold) 1 for sand mold making.
When the blowing device 10 blows the foundry sand into the cavity of the mold 1, a sand mold corresponding to the shape of the cavity of the mold 1 is formed (see FIGS. 1 and 2).
A sand mold is a mold made from foundry sand. Sand molds include an outer mold that molds the outer shape of a casting, a core that is used when manufacturing a casting including a hollow portion, and a core that molds the inner shape of the casting.
As shown in FIG. 1, the mold 1 includes an upper mold 2 and a lower mold 3 that can collide with the upper mold 2. Then, a cavity is formed in the mold 1 (between the upper mold 2 and the lower mold 3) in a state where the upper mold 2 and the lower mold 3 are brought into contact with each other. The cavity is an internal space having the same shape as the sand mold to be molded, and has a cavity surface serving as a molding surface.
In the mold 1, flow paths 4, 4... Are formed for allowing foundry sand to flow into the cavity. One end of each of the flow paths 4, 4... Is opened at the outer peripheral surface of the mold 1 to form a blowing port 5, 5, and the other end is connected to the cavity of the mold 1. That is, the flow paths 4, 4... Are communication paths that communicate the inside and outside of the cavity of the mold 1.
It should be noted that the number and arrangement positions of the blowing ports 5, 5 ..., that is, the number and arrangement positions of the flow paths 4, 4 ... are appropriately set according to the shape of the sand mold to be molded, etc. Different for each type of mold 1.

吹き込み装置１０は、容器１１・１１・・・、エアホース１２、エア供給装置（不図示）、アミンガス供給装置（不図示）を備える。   The blowing device 10 includes containers 11, 11..., An air hose 12, an air supply device (not shown), and an amine gas supply device (not shown).

各容器１１は、エアホース１２を介してエア供給装置又はアミンガス供給装置と接続可能に構成されている。
例えば、エアホース１２の端部をエア供給装置又はアミンガス供給装置に対して着脱容易な形態に構成し、適宜着脱することにより、エアホース１２の接続対象を切り替える構成、若しくは、適宜の切替え弁を介してエアホース１２にエア供給装置及びアミンガス供給装置を接続し、前記切替え弁を切り替えることにより、エアホース１２の接続対象を切り替える構成等が適用できる。このようにして、容器１１・１１・・・内にエアホース１２・１２・・・を介してエア又はアミンガスを供給可能とする構成である。 Each container 11 is configured to be connectable to an air supply device or an amine gas supply device via an air hose 12.
For example, the end of the air hose 12 is configured to be easily attached to and detached from the air supply device or the amine gas supply device, and the connection target of the air hose 12 is switched by appropriately attaching or detaching, or through an appropriate switching valve. The structure etc. which switch the connection object of the air hose 12 by connecting an air supply apparatus and an amine gas supply apparatus to the air hose 12, and switching the said switching valve are applicable. In this way, air or amine gas can be supplied into the containers 11, 11... Via the air hoses 12, 12.

容器１１・１１・・・及びそれらに接続されるエアホース１２・１２・・・の数は、金型１に形成されている吹き込み口５・５・・・の数と一致し、金型１の種類（吹き込み口５・５・・・の数）に応じて変更される。以下では、容器１１・１１・・・のうちの任意の一つの容器１１について説明する。   The number of containers 11, 11 ... and the air hoses 12, 12 ... connected to them match the number of blowing ports 5, 5 ... formed in the mold 1, It changes according to the type (the number of the blow-in ports 5, 5...). Hereinafter, an arbitrary one of the containers 11, 11... Will be described.

容器１１は、内部に鋳物砂を収容可能な収容部１３、及び収容部１３内（収容部１３の内周面で囲まれる空間内）に収容される鋳物砂を噴出するノズル部１４を備える。容器１１は、中空の四角柱形状に形成されている。   The container 11 includes an accommodating portion 13 that can accommodate foundry sand therein, and a nozzle portion 14 that ejects the foundry sand accommodated in the accommodating portion 13 (in a space surrounded by the inner peripheral surface of the accommodating portion 13). The container 11 is formed in a hollow quadrangular prism shape.

収容部１３は、容器１１の内部に形成される略四角柱形状の空間であり、両端に開口を有する。収容部１３内に鋳物砂を収容可能に構成されている。
収容部１３の一端（金型１に設置した際に重力が作用する向きとなる側であり、図１における下端）の開口は、ノズル部１４と接続されている。また、収容部１３の他端の開口は、エアホース１２と接続可能に構成されている。 The accommodating part 13 is a substantially quadrangular prism-shaped space formed inside the container 11 and has openings at both ends. It is comprised so that accommodation of foundry sand in the accommodating part 13 is possible.
The opening of one end of the accommodating portion 13 (the side in which the gravity acts when installed in the mold 1 and the lower end in FIG. 1) is connected to the nozzle portion 14. Further, the opening at the other end of the accommodating portion 13 is configured to be connectable to the air hose 12.

収容部１３の内周面には、一端に向かうに従い内方に傾斜して（ノズル部１４に向かって連続的に傾斜して）、ノズル部１４に連なる傾斜部１５が形成されている。つまり、収容部１３内における傾斜部１５の形成箇所の断面形状は、ノズル部１４に向けて狭くなるテーパ形状になる。そして、傾斜部１５により収容部１３内の鋳物砂がノズル部１４へと誘導されるように構成されている。   On the inner peripheral surface of the accommodating portion 13, an inclined portion 15 that is inclined inward toward the one end (continuously inclined toward the nozzle portion 14) and continues to the nozzle portion 14 is formed. That is, the cross-sectional shape of the forming portion of the inclined portion 15 in the accommodating portion 13 is a tapered shape that becomes narrower toward the nozzle portion 14. And it is comprised so that the casting sand in the accommodating part 13 may be guide | induced to the nozzle part 14 by the inclination part 15. As shown in FIG.

ノズル部１４は、基端部から先端部まで貫通した孔が形成された筒状の部材である。
ノズル部１４の基端部は、収容部１３の一端の開口と接続されており、収容部１３内に収容されている鋳物砂が、ノズル部１４の孔を通じてノズル部１４の先端部から噴出可能に構成されている。
ノズル部１４の先端部は、吹き込み口５の形状に応じた形状に形成されており、吹き込み口５と係合可能に構成されている。 The nozzle portion 14 is a cylindrical member in which a hole penetrating from the proximal end portion to the distal end portion is formed.
The base end portion of the nozzle portion 14 is connected to the opening at one end of the accommodating portion 13, and the casting sand accommodated in the accommodating portion 13 can be ejected from the distal end portion of the nozzle portion 14 through the hole of the nozzle portion 14. It is configured.
The tip of the nozzle portion 14 is formed in a shape corresponding to the shape of the blowing port 5 and is configured to be engageable with the blowing port 5.

収容部１３の他端の開口は、両端が開口する管状の部材であるエアホース１２の一端と接続可能に構成されている。
エアホース１２の他端は、エア供給装置又はアミンガス供給装置と接続可能に構成されている。
収容部１３がエアホース１２を介してエア供給装置と接続されているときは、エア供給装置からエアホース１２を通じて収容部１３内にエアを供給できる。
また、収容部１３がエアホース１２を介してアミンガス供給装置と接続されているときは、アミンガス供給装置からエアホース１２を通じて収容部１３内にアミンガス（鋳物砂の硬化を促進する気体）を供給できる。 The opening at the other end of the accommodating portion 13 is configured to be connectable to one end of an air hose 12 that is a tubular member that opens at both ends.
The other end of the air hose 12 is configured to be connectable to an air supply device or an amine gas supply device.
When the housing portion 13 is connected to the air supply device via the air hose 12, air can be supplied from the air supply device to the housing portion 13 through the air hose 12.
Moreover, when the accommodating part 13 is connected with the amine gas supply apparatus via the air hose 12, amine gas (gas which accelerates | stimulates hardening of foundry sand) can be supplied in the accommodating part 13 through the air hose 12 from an amine gas supply apparatus.

エア供給装置及びアミンガス供給装置は、複数の収容部１３・１３・・・とエアホース１２・１２・・・を介して接続可能に構成されている。また、エア供給装置は、各収容部１３と接続された状態にて、各収容部１３内に供給するエアの気圧を収容部１３毎に制御可能に構成されている。   The air supply device and the amine gas supply device are configured to be connectable via a plurality of housing portions 13, 13... And air hoses 12, 12. In addition, the air supply device is configured to be able to control the air pressure of the air supplied into each storage section 13 for each storage section 13 while being connected to each storage section 13.

各収容部１３内に鋳物砂が収容され、さらに各収容部１３がエア供給装置に接続されている状態で、エア供給手段（エア供給装置及び各エアホース１２）から各収容部１３内にエアが供給されると、供給されたエアの気圧で各収容部１３内の鋳物砂が各ノズル部１４から噴出する。
また、各収容部１３内が空所の状態であり、さらに各収容部１３がアミンガス供給装置に接続されている状態で、アミンガス供給手段（アミンガス供給装置及び各エアホース１２）から各収容部１３内にアミンガスが供給されると、供給されたアミンガスが各ノズル部１４から噴出する。 In the state where the foundry sand is accommodated in each accommodating portion 13 and each accommodating portion 13 is connected to the air supply device, air is supplied from the air supply means (air supply device and each air hose 12) into each accommodating portion 13. When supplied, the foundry sand in each accommodating portion 13 is ejected from each nozzle portion 14 with the pressure of the supplied air.
Further, the interior of each accommodating portion 13 is empty, and further, the respective accommodating portions 13 are connected to the amine gas supply device, and from the amine gas supply means (amine gas supply device and each air hose 12), When the amine gas is supplied to the nozzles, the supplied amine gas is ejected from each nozzle portion 14.

以下では、図３（ａ）に示すように、三つの吹き込み口５・５・５が一列に並んで形成されている金型１ａ（上型２ａ・下型３ａ）のキャビティ内に鋳物砂を吹き込むときの手順について説明する。
なお、以下の（１）〜（５）の順に鋳物砂の吹き込み作業が行われることとする。 Below, as shown to Fig.3 (a), casting sand is put in the cavity of the metal mold | die 1a (upper mold | type 2a, lower mold | type 3a) in which the three blowing inlets 5, 5, and 5 are formed in a line. The procedure for blowing will be described.
In addition, blasting work of casting sand shall be performed in order of the following (1)-(5).

（１）三つの容器１１・１１・１１が用意される（図３（ａ）参照）。
（２）各容器１１の各収容部１３内に、鋳物砂がそれぞれ収容される。
（３）金型１ａの上型２ａと下型３ｂとが衝合された状態にて、各吹き込み口５に各容器１１の各ノズル部１４の先端部が挿入され、各ノズル部１４の先端部が各吹き込み口５に係合される（図３（ｂ）参照）。
（４）各収容部１３が各エアホース１２を介してエア供給装置に接続され（図３（ｃ）参照）、さらにエア供給装置が作動される。これにより、エアが各エアホース１２を流れていき、各収容部１３内に供給される。そして、各収容部１３内に供給されたエアの気圧で各収容部１３内の鋳物砂が各ノズル部１４から噴出して、各流路４を通じて金型１ａのキャビティ内に吹き込まれる。
（５）所定時間経過後（各収容部１３内の鋳物砂の噴出完了後）、エア供給装置が停止される。そして、各エアホース１２の他端がエア供給装置から外されて、アミンガス供給装置に接続され、さらにアミンガス供給装置が作動される。これにより、アミンガスが各エアホース１２を通じて各収容部１３内に搬送され、そして各ノズル部１４から噴出して、金型１ａのキャビティ内に吹き込まれる。そして、アミンガスの作用により金型１ａのキャビティ内の鋳物砂が硬化して、砂鋳型になる。 (1) Three containers 11, 11, and 11 are prepared (see FIG. 3A).
(2) The foundry sand is accommodated in each accommodating portion 13 of each container 11.
(3) In a state where the upper mold 2a and the lower mold 3b of the mold 1a are brought into contact with each other, the distal end portion of each nozzle portion 14 of each container 11 is inserted into each blowing port 5, and the distal end of each nozzle portion 14 is inserted. A part is engaged with each blowing port 5 (refer FIG.3 (b)).
(4) Each accommodating portion 13 is connected to an air supply device via each air hose 12 (see FIG. 3C), and the air supply device is further operated. Thereby, air flows through each air hose 12 and is supplied into each accommodating portion 13. And the casting sand in each accommodating part 13 is ejected from each nozzle part 14 by the pressure of the air supplied into each accommodating part 13, and is blown into the cavity of the mold 1 a through each flow path 4.
(5) After a predetermined time has elapsed (after completion of the ejection of the foundry sand in each housing portion 13), the air supply device is stopped. Then, the other end of each air hose 12 is disconnected from the air supply device, connected to the amine gas supply device, and the amine gas supply device is operated. Thereby, amine gas is conveyed in each accommodating part 13 through each air hose 12, is ejected from each nozzle part 14, and is blown in in the cavity of the metal mold | die 1a. Then, the casting sand in the cavity of the mold 1a is hardened by the action of the amine gas to form a sand mold.

なお、四つの吹き込み口５・５・５・５が二つずつ二列に並んで形成されており、金型１ａとは種類が異なる金型１ｂのキャビティ内に鋳物砂を吹き込むときは、上記（１）において四つの容器１１・１１・１１・１１を用意すればよい（図４（ａ）参照）。以後は、上記（２）〜（５）に基づいて、用意した各容器１１の各収容部１３内に鋳物砂を収容する作業、各容器１１の各ノズル部１４を各吹き込み口５に係合する作業、各収容部１３内へのエアの供給作業、金型１ｂのキャビティ内へのアミンガスの供給作業を行えばよい（図４（ｂ）及び図４（ｃ）参照）。   The four blowing ports 5, 5, 5, and 5 are formed in two rows of two, and when the foundry sand is blown into the cavity of the mold 1b that is different from the mold 1a, In (1), four containers 11, 11, 11, and 11 may be prepared (see FIG. 4A). Thereafter, on the basis of the above (2) to (5), the work of accommodating the foundry sand in each accommodating portion 13 of each prepared container 11, and each nozzle portion 14 of each container 11 are engaged with each blowing port 5. It is only necessary to perform an operation for supplying air, an operation for supplying air into each housing portion 13, and an operation for supplying amine gas into the cavity of the mold 1b (see FIGS. 4B and 4C).

以上のように構成することで、各容器１１がユニット化されて互いに独立しているので、各容器１１の各ノズル部１４の位置関係を自由に設定できる。これにより、様々な種類の金型に対応できる。また、種類が異なる金型に用いる場合でも、鋳物砂の吹き込み対象となる金型に形成される吹き込み口５・５・・・の数と同数の容器１１・１１・・・を用意すれば、以後は上記（２）〜（５）に基づいて各種作業を行えばよく、煩雑な作業を要しない。従って、汎用性に優れ、種類の異なる金型に対しても容易に対応することができる。   By configuring as described above, each container 11 is unitized and independent from each other, so that the positional relationship of each nozzle portion 14 of each container 11 can be freely set. Thereby, it can respond to various kinds of metal molds. In addition, even when using different types of molds, if the same number of containers 11, 11... As the number of blow ports 5, 5. Thereafter, various operations may be performed based on the above (2) to (5), and no complicated operation is required. Therefore, it is excellent in versatility and can easily cope with different types of molds.

また、前述のようにエア供給装置から各収容部１３に供給されるエアの気圧は収容部１３毎に制御可能に構成されている。従って、上記（４）においてエアを各収容部１３内に供給する際、収容部１３毎にエアの気圧を適宜設定することにより、各収容部１３内の鋳物砂にかかるエアの気圧を最適化できる。
例えば、金型１のキャビティ内における深い部分Ａ、複雑な形状の部分、狭い（細い）形状の部分等、鋳物砂を充填しにくい部分に吹き込まれる鋳物砂を収容する収容部１３内に対しては、供給するエアの気圧を高めに設定する（図１及び図２参照）。これにより鋳物砂を確実に充填できる。
また、金型１のキャビティ内における浅い部分Ｂ等、吹き込まれた鋳物砂の圧力等により摩耗しやすい部分に吹き込まれる鋳物砂を収容する収容部１３内に対しては、供給するエアの気圧を低めに設定する（図１及び図２参照）。これにより金型１のキャビティの摩耗を抑制できる。 Further, as described above, the air pressure of the air supplied from the air supply device to each storage unit 13 is configured to be controllable for each storage unit 13. Therefore, when air is supplied into each accommodating portion 13 in (4) above, the air pressure applied to the foundry sand in each accommodating portion 13 is optimized by appropriately setting the air pressure for each accommodating portion 13. it can.
For example, with respect to the inside of the accommodating portion 13 that accommodates foundry sand that is blown into a portion that is difficult to be filled with foundry sand, such as a deep portion A, a complicated shape portion, a narrow (thin) shape portion in the cavity of the mold 1. Set the air pressure of the supplied air to be higher (see FIGS. 1 and 2). Thereby, it is possible to reliably fill the foundry sand.
Further, the air pressure of the supplied air is applied to the inside of the accommodating portion 13 for accommodating the molding sand blown into the shallow portion B in the cavity of the mold 1 or the like that is easily worn by the pressure of the blown casting sand. Set lower (see FIGS. 1 and 2). Thereby, wear of the cavity of the mold 1 can be suppressed.

また、鋳物砂は、粘結剤（接着剤）を含むため、粘性が高く、このため気圧を付加されても崩れにくい。これにより、図１４（ｂ）に示すように、従来の吹き込み装置１００を用いると各ノズル部１２０上にある鋳物砂は各ノズル部１２０から噴出しやすいが、その他の位置にある鋳物砂は、収容部１１０内へ供給されたエアが各ノズル部１２０（吹き込み口）へショートカットしてしまうため、収容部１１０内に残留しやすい。そして、収容部１１０内に残留した鋳物砂は粘結剤を含むために経時変化で空気中の水分と反応して硬化してしまう。
本実施形態では、図５に示すように、一つのノズル部１４が接続される収容部１３に対してそれぞれエアを供給すると共に、各収容部１３の内周面に傾斜部１５をそれぞれ設けることにより、気圧を付加された各収容部１３内の鋳物砂が各ノズル部１４へと誘導される。これにより、上記（４）においてエアの気圧で鋳物砂を噴出する際、各収容部１３内の鋳物砂を全て各ノズル部１４から噴出でき、各収容部１３内に鋳物砂が残留することを防止できる。 In addition, since the foundry sand contains a binder (adhesive), the foundry sand has a high viscosity, so that it is difficult to collapse even when atmospheric pressure is applied. Thus, as shown in FIG. 14B, when using the conventional blowing device 100, the foundry sand on each nozzle part 120 is easily ejected from each nozzle part 120, but the foundry sand at other positions is Since the air supplied into the accommodating part 110 is shortcut to each nozzle part 120 (blowing port), it tends to remain in the accommodating part 110. And since the foundry sand remaining in the accommodating part 110 contains a binder, it reacts with moisture in the air and hardens over time.
In the present embodiment, as shown in FIG. 5, air is supplied to the accommodating portions 13 to which one nozzle portion 14 is connected, and inclined portions 15 are provided on the inner peripheral surface of each accommodating portion 13. Thus, the foundry sand in each accommodating portion 13 to which atmospheric pressure is applied is guided to each nozzle portion 14. Thus, when the foundry sand is ejected at the air pressure in (4) above, all the foundry sand in each accommodating portion 13 can be ejected from each nozzle portion 14, and the foundry sand remains in each accommodated portion 13. Can be prevented.

また、上記（５）に示すように、エアの供給作業終了後、すでに各吹き込み口５に、各ノズル部１４及び各収容部１３を介して接続されている状態にある各エアホース１２を用いて、アミンガスの供給作業を行うので、アミンガスの供給作業を簡素化でき、円滑に行える。なお、前述のように各収容部１３の内周面に傾斜部１５を設けることにより、各収容部１３内の鋳物砂を全て各ノズル部１４から噴出できるので、上記（５）においてアミンガスが各エアホース１２を通じて各収容部１３内に搬送されても、各収容部１３内に硬化した鋳物砂が発生する等の問題は生じない。   Moreover, as shown in said (5), after completion | finish of the supply operation | work of air, using each air hose 12 already in the state connected to each blowing inlet 5 via each nozzle part 14 and each accommodating part 13. Since the amine gas supply operation is performed, the amine gas supply operation can be simplified and performed smoothly. In addition, since all the casting sand in each accommodating part 13 can be ejected from each nozzle part 14 by providing the inclination part 15 in the internal peripheral surface of each accommodating part 13 as mentioned above, each amine gas is said in (5). Even if it is transported into each accommodating portion 13 through the air hose 12, problems such as generation of hardened foundry sand in each accommodating portion 13 do not occur.

また、上記（２）において各収容部１３内に鋳物砂を収容する際、収容部１３毎に収容する鋳物砂の種類（砂の種類・粒径や、粘結剤の種類・濃度等）を適宜設定することにより、上記（５）において造型された砂鋳型の強度（崩壊性）を部分毎に狙った大きさにでき、最適化できる。
例えば、金型１のキャビティ内の細い形状の部分Ｃに送り込まれる鋳物砂を収容する収容部１３ｃ内には、粘結剤の量が多い鋳物砂を収容する（図１及び図２参照）。これにより、造型された砂鋳型の細い形状の部分の強度が高くなり、この細い形状の部分が鋳込み中に破損することを防止できる。
また、金型１のキャビティ内の複雑な形状の部分Ｄに圧送される鋳物砂を収容する収容部１３ｄ内には、粘結剤の量が少ない鋳物砂を収容する（図１及び図２参照）。これにより、造型された砂鋳型（中子）の複雑な形状の部分の崩壊性がよくなり、鋳込み後の砂鋳型の除去を確実にできる。
なお、鋳込み後の鋳物砂の除去には、熱処理（粘結剤を熱で燃焼させる）やノッキング等の方法が用いられる。 In addition, when the foundry sand is accommodated in each accommodating portion 13 in (2) above, the type of foundry sand to be accommodated for each accommodated portion 13 (the type / particle size of the sand, the type / concentration of the binder, etc.) By appropriately setting, the strength (disintegration) of the sand mold formed in the above (5) can be set to a target size for each part and can be optimized.
For example, in the accommodating part 13c which accommodates the foundry sand sent into the thin-shaped part C in the cavity of the metal mold | die 1, the amount of foundry sand with much amount of binder is accommodated (refer FIG.1 and FIG.2). Thereby, the strength of the thin-shaped portion of the molded sand mold is increased, and the thin-shaped portion can be prevented from being damaged during casting.
Moreover, in the accommodating part 13d which accommodates the foundry sand pumped by the complicated-shaped part D in the cavity of the metal mold | die 1, the amount of caking additive is accommodated (refer FIG.1 and FIG.2). ). Thereby, the disintegration property of the complicated shape part of the molded sand mold (core) is improved, and removal of the sand mold after casting can be ensured.
In addition, methods, such as heat processing (a binder is burned with heat) and knocking, are used for the removal of the foundry sand after casting.

また、図１４（ａ）及び図１５に示すように、砂鋳型の造型の際に、同一種類の鋳物砂を用いるとき、一般に砂鋳型における最も強度を必要とする部分の強度に合わせて、造型に用いる鋳物砂の種類を設定する。これにより、砂鋳型における高い強度を必要としない部分にも高い強度を発揮できる鋳物砂を用いることになり、鋳物砂の材料費がかかる。
本実施形態では、上記（２）において収容部１３毎に鋳物砂の種類を適宜設定することにより、部分毎に最適な種類の鋳物砂を用いた砂鋳型を造型できるので、鋳物砂を無駄なく使え、鋳物砂の材料費を低減できる。 Further, as shown in FIGS. 14 (a) and 15, when the same type of foundry sand is used in the molding of the sand mold, the molding is generally performed in accordance with the strength of the portion requiring the most strength in the sand mold. Set the type of foundry sand to be used. Thereby, the foundry sand which can exhibit high intensity | strength also in the part which does not require the high intensity | strength in a sand mold will be used, and the material cost of foundry sand starts.
In the present embodiment, the sand mold using the most suitable type of foundry sand can be formed for each portion by appropriately setting the type of foundry sand for each accommodating portion 13 in the above (2). It can be used and the material cost of foundry sand can be reduced.

また、上記（２）において各収容部１３内に鋳物砂を収容する際、収容部１３毎に収容する鋳物砂の量を適宜設定することにより、鋳物砂の使用量を最適化でき、鋳物砂を無駄なく使える。
例えば、金型１のキャビティ内の深い（厚肉）部分Ａに吹き込まれる鋳物砂を収容する収容部１３内には、多量の鋳物砂を収容する（図１及び図２参照）。
また、金型１のキャビティ内の浅い（薄肉）部分Ｂに吹き込まれる鋳物砂を収容する収容部１３内には、少量の鋳物砂を収容する（図１及び図２参照）。 Moreover, when accommodating molding sand in each accommodating part 13 in said (2), the usage-amount of foundry sand can be optimized by setting suitably the quantity of casting sand accommodated for every accommodating part 13, and foundry sand Can be used without waste.
For example, a large amount of foundry sand is accommodated in the accommodating portion 13 for accommodating foundry sand blown into a deep (thick) portion A in the cavity of the mold 1 (see FIGS. 1 and 2).
A small amount of foundry sand is accommodated in the accommodating portion 13 that accommodates the foundry sand blown into the shallow (thin) portion B in the cavity of the mold 1 (see FIGS. 1 and 2).

また、前述のように鋳物砂の量・種類や、エア供給装置から圧送されるエアの気圧を収容部１３毎に最適化することで、上記（３）において金型１のキャビティ内に鋳物砂を吹き込む際に使用するエネルギー量や、鋳込み後に砂鋳型を除去する際に使用するエネルギー量等を低減できる。   Further, as described above, the amount and type of foundry sand and the pressure of air pumped from the air supply device are optimized for each housing portion 13, so that the foundry sand is placed in the cavity of the mold 1 in the above (3). It is possible to reduce the amount of energy used when blowing in and the amount of energy used when removing the sand mold after casting.

なお、上記（２）において収容部１３毎に種類の異なる鋳物砂が収容された各容器１１を用意し、上記（４）において各容器１１にエアを供給する際に、容器１１毎にエアを供給するタイミングに時間差を設け、これにより各容器１１の各ノズル部１４から鋳物砂が噴出するタイミングをそれぞれ異ならせてもよい。
このように構成することで、金型１のキャビティ内に種類の異なる鋳物砂を積層させることができ、これにより肉厚部分に強度の異なる層が形成された砂鋳型を造型できる。 In the above (2), each container 11 containing different types of foundry sand is prepared for each container 13 and when air is supplied to each container 11 in (4), the air is supplied to each container 11. A time difference may be provided in the supply timing, and thereby the timing at which the foundry sand is ejected from each nozzle portion 14 of each container 11 may be varied.
By comprising in this way, different types of foundry sand can be laminated | stacked in the cavity of the metal mold | die 1, Thereby, the sand mold in which the layer from which intensity | strength differs in the thick part was formed can be shape | molded.

［第二実施形態］
以下に、本発明に係る鋳物砂の吹き込み装置の第二実施形態である鋳物砂の吹き込み装置２０について、図面を参照して説明する。
なお、以下では第一実施形態の鋳物砂の吹き込み装置１０と異なる部分について説明し、同様の部材に対しては同一符号を付し、詳細な説明およびそれに付随する効果等の記載は省略する。 [Second Embodiment]
A foundry sand blowing device 20 according to a second embodiment of the foundry sand blowing device according to the present invention will be described below with reference to the drawings.
In the following, parts different from the foundry sand blowing apparatus 10 of the first embodiment will be described, the same members will be denoted by the same reference numerals, and detailed descriptions and descriptions of effects etc. will be omitted.

吹き込み装置２０は、砂鋳型造型用の型（金型）１のキャビティ内に鋳物砂（砂に粘結剤等を混合したもの）を吹き込む装置である。
吹き込み装置２０が金型１のキャビティ内に鋳物砂を吹き込むことにより、金型１のキャビティの形状に応じた砂鋳型が造型される（図６及び図７参照）。
図６に示すように、吹き込み装置２０は、容器２１・２１・・・を備える。
容器２１・２１・・・の数は、金型１に形成されている吹き込み口５・５・・・の数と一致し、金型１の種類（吹き込み口５・５・・・の数）に応じて変更される。以下では、容器２１・２１・・・のうちの任意の一つの容器２１について説明する。 The blowing device 20 is a device that blows foundry sand (a mixture of sand and a binder) into a cavity of a mold (mold) 1 for sand mold making.
When the blowing device 20 blows the foundry sand into the cavity of the mold 1, a sand mold corresponding to the shape of the cavity of the mold 1 is formed (see FIGS. 6 and 7).
As shown in FIG. 6, the blowing device 20 includes containers 21, 21.
The number of containers 21... Coincides with the number of blowing ports 5, 5... Formed in the mold 1, and the type of the mold 1 (number of blowing ports 5, 5...). Will be changed according to Hereinafter, an arbitrary one of the containers 21, 21... Will be described.

容器２１は、内部に鋳物砂及び圧縮気体を収容可能な収容部２２、及び収容部２２を密封・開封する開閉部を備える。容器２１は、一端が開口する中空の四角柱形状に形成されている。   The container 21 includes an accommodating portion 22 that can accommodate foundry sand and compressed gas, and an opening / closing portion that seals and opens the accommodating portion 22. The container 21 is formed in a hollow quadrangular prism shape that is open at one end.

収容部２２は、先端（金型１に設置した際に重力が作用する向きとなる側であり、図６における下端）に開口部２３を有する中空形状に形成されており、収容部２２内（収容部２２の内周面で囲まれる空間内）に鋳物砂及び圧縮気体を収容可能に構成されている。
収容部２２の内周面には、先端部に向かうに従い内方に傾斜して（開口部２３に向かって連続的に傾斜して）、開口部２３に連なる傾斜部２４が形成されている。つまり、容器２１内における傾斜部２４の形成箇所の断面形状は、開口部２３に向けて狭くなるテーパ形状になる。そして、傾斜部２４により収容部２２内の鋳物砂が開口部２３に誘導されるように構成されている。
収容部２２の先端部の開口部２３は、吹き込み口５の形状に応じた形状に形成されており、吹き込み口５と係合可能に構成されている。 The accommodating portion 22 is formed in a hollow shape having an opening 23 at the tip (the side on which gravity acts when installed on the mold 1 and the lower end in FIG. 6), and the inside of the accommodating portion 22 ( The molding sand and the compressed gas can be accommodated in the space surrounded by the inner peripheral surface of the accommodating portion 22.
On the inner peripheral surface of the accommodating portion 22, an inclined portion 24 that is inclined inward toward the distal end portion (inclined continuously toward the opening portion 23) and continues to the opening portion 23 is formed. That is, the cross-sectional shape of the portion where the inclined portion 24 is formed in the container 21 is a tapered shape that becomes narrower toward the opening 23. And it is comprised so that the casting sand in the accommodating part 22 may be guide | induced to the opening part 23 by the inclination part 24. FIG.
The opening 23 at the distal end of the accommodating portion 22 is formed in a shape corresponding to the shape of the blowing port 5 and is configured to be engageable with the blowing port 5.

前記開閉部は、開口部２３を閉じることにより収容部２２を密封する。また、前記開閉部は、開口部２３を開けることにより収容部２２を開封する。つまり、前記開閉部は、開口部２３を開閉することにより、収容部２２内を開封または密封することが可能である。
前記開閉部の一例として、図８に示す開閉部２５や、図１１に示す開閉部２６がある。 The opening / closing part seals the accommodating part 22 by closing the opening part 23. Further, the opening / closing part opens the opening part 23 to open the housing part 22. That is, the opening / closing part can open or seal the inside of the accommodating part 22 by opening and closing the opening 23.
As an example of the opening / closing part, there are the opening / closing part 25 shown in FIG. 8 and the opening / closing part 26 shown in FIG. 11.

図８（ａ）及び図８（ｂ）に示すように、開閉部２５は、球状の部材であり、収容部２２内に収容されている。また、開閉部２５は、外径が開口部２３の内径よりも僅かに大きく設定されており、開口部２３を通過不能に構成されている。そして、収容部２２内に圧縮気体が供給されると、前記開閉部は、供給された圧縮気体の気圧で開口部２３側へ押されて、開口部２３に係止し、該開口部２３を閉じる（図８（ａ）参照）。
このように、開閉部２５が開口部２３を閉じた状態で、容器２１の開口部２３を吹き込み口５に係合させる（挿入する）と、開閉部２５が、上型２に設けられる治具６に当接し、さらに治具６から抗力を受けて収容部２２内に押し込まれ、これにより開口部２３を開ける（図８（ｂ）参照）。
治具６は、流路４内における吹き込み口５近傍に設けられている。治具６は、吹き込み口５に向かって突出し、開閉部２５を収容部２２内に押し込む凸部６ａと（図８（ａ）参照）、流路４の延在する方向に貫通し、流路４を流れる鋳物砂が通過する空所部６ｂ・６ｂ・・・と（図９参照）、を有する。
なお、開閉部２５と凸部６ａとの当接面の形状について、開閉部２５の当接面を、凸部６ａの当接面（突起形状）に略沿うように凹ませて、凹部２５ａからなる形状にしてもよい（図１０（ａ）参照）。また、凸部６ａの当接面を、開閉部２５の当接面（球面形状）に略沿うように湾曲させて、湾曲部６ｃからなる形状にしてもよい（図１０（ｂ）参照）。 As shown in FIGS. 8A and 8B, the opening / closing part 25 is a spherical member and is accommodated in the accommodating part 22. The opening / closing part 25 has an outer diameter set slightly larger than the inner diameter of the opening 23 and is configured so as not to pass through the opening 23. Then, when compressed gas is supplied into the accommodating portion 22, the opening / closing portion is pushed toward the opening 23 by the pressure of the supplied compressed gas, and is locked to the opening 23. Close (see FIG. 8A).
As described above, when the opening 23 of the container 21 is engaged with (inserted into) the blowing port 5 with the opening / closing portion 25 closing the opening 23, the opening / closing portion 25 is provided in the upper mold 2. 6, and further received a drag force from the jig 6 and pushed into the accommodating portion 22, thereby opening the opening 23 (see FIG. 8B).
The jig 6 is provided in the vicinity of the blowing port 5 in the flow path 4. The jig 6 protrudes toward the blowing port 5 and penetrates in a direction in which the flow path 4 extends, with a convex part 6a that pushes the opening / closing part 25 into the accommodating part 22 (see FIG. 8A). 4 (see FIG. 9), through which the foundry sand flowing through 4 passes.
In addition, about the shape of the contact surface of the opening-and-closing part 25 and the convex part 6a, the contact surface of the opening-and-closing part 25 is dented so that it may substantially follow the contact surface (projection shape) of the convex part 6a, and from the recessed part 25a. You may make it the shape which becomes (refer Fig.10 (a)). Further, the contact surface of the convex portion 6a may be curved so as to be substantially along the contact surface (spherical shape) of the opening / closing portion 25 to have a shape including the curved portion 6c (see FIG. 10B).

また、図１１（ａ）及び図１１（ｂ）に示すように、開閉部２６は、板状の部材であり、治具２７により支持されている。
治具２７は、開閉部２６をスライド自在に支持する部材であり、さらに開口部２３を吹き込み口５に対して係合した状態に支持する部材である。
治具２７は円筒状に形成されていて、その内周面には雌螺子が形成されている。治具２７の一端側には、外周面に雄螺子が形成された開口部２３がねじ込まれて取り付けられている。
治具２７の他端部は、吹き込み口５に応じた形状に形成されており、吹き込み口５の周縁部に取り付け可能に構成されている。治具２７の他端部が吹き込み口５の周縁部に取り付けられると、治具２７の一端側に取り付けられている開口部２３が、吹き込み口５に対向した状態になり、吹き込み口５と係合した状態になる。
治具２７の一端側に取り付けられている開口部２３の下方には、開閉部２６が開口部２３に対して隙間なく配置されている。開閉部２６は、治具２７に形成されている左右方向に貫通する孔に貫入しており、当該孔をスライド可能に構成されている。開閉部２６の上面には収容部２２内の鋳物砂のモレを防止するパッキン２６ａが配置されている。また、開閉部２６には上下方向に貫通し、収容部２２内の鋳物砂の通過を許容する貫通孔２６ｂが形成されている。貫通孔２６ｂは、パッキン２６ａに対して開閉部２６のスライド方向（左右方向）に所定間隔を空けて配置されている（図１２参照）。
開閉部２６をパッキン２６ａが開口部２３の下方にくる位置にスライドすると、開閉部２６により開口部２３が閉じられ（図１１（ａ）参照）、開閉部２６を貫通孔２６ｂが開口部２３の下方にくる位置にスライドすると、開口部２３を通じて開口部２３が開放される（図１１（ｂ）参照）。 Further, as shown in FIGS. 11A and 11B, the opening / closing part 26 is a plate-like member and is supported by a jig 27.
The jig 27 is a member that slidably supports the opening / closing portion 26, and is a member that supports the opening 23 in a state of being engaged with the blowing port 5.
The jig 27 is formed in a cylindrical shape, and a female screw is formed on the inner peripheral surface thereof. On one end side of the jig 27, an opening 23 having a male screw formed on the outer peripheral surface is screwed and attached.
The other end portion of the jig 27 is formed in a shape corresponding to the blowing port 5, and is configured to be attachable to the peripheral portion of the blowing port 5. When the other end of the jig 27 is attached to the peripheral edge of the blowing port 5, the opening 23 attached to one end of the jig 27 faces the blowing port 5. Combined state.
Below the opening 23 attached to one end of the jig 27, the opening / closing part 26 is arranged with no gap with respect to the opening 23. The opening / closing part 26 penetrates through a hole formed in the jig 27 in the left-right direction, and is configured to be slidable. On the upper surface of the opening / closing part 26, a packing 26a for preventing leakage of foundry sand in the accommodating part 22 is disposed. Further, the opening / closing portion 26 is formed with a through hole 26 b that penetrates in the vertical direction and allows the foundry sand in the housing portion 22 to pass therethrough. The through holes 26b are arranged at a predetermined interval in the sliding direction (left-right direction) of the opening / closing part 26 with respect to the packing 26a (see FIG. 12).
When the opening / closing portion 26 is slid to a position where the packing 26 a comes below the opening 23, the opening 23 is closed by the opening / closing portion 26 (see FIG. 11A), and the through-hole 26 b of the opening / closing portion 26 corresponds to the opening 23. If it slides to the position which comes below, the opening part 23 will be open | released through the opening part 23 (refer FIG.11 (b)).

以下では、図１３（ａ）及び図１３（ｂ）に示すように、九つの吹き込み口５・５・・・が三つずつ三列に並んで形成されている金型１ｃ（上型２ｃ・下型３ｃ）のキャビティ内に鋳物砂を吹き込むときの手順について説明する。
なお、以下の（ａ）〜（ｆ）の順に鋳物砂の吹き込み作業が行われることとする。 In the following, as shown in FIG. 13 (a) and FIG. 13 (b), a mold 1c (upper mold 2c. The procedure for blowing casting sand into the cavity of the lower mold 3c) will be described.
It is assumed that casting sand is blown in the order of the following (a) to (f).

（ａ）九つの容器２１・２１・・・が用意される（図１３（ａ）参照）。
（ｂ）各容器２１の各収容部２２内に、鋳物砂及び圧縮された不活性ガス（鋳物砂の硬化を抑制する気体）がそれぞれ収容される。
（ｃ）各前記開閉部で各開口部２３が閉じられて、各収容部２２が密封される。つまり、各収容部２２内に鋳物砂及び圧縮された不活性ガス（圧縮不活性ガス）が封入される。
（ｄ）金型１ｃの上型２ｃと下型３ｃとが衝合された状態にて、各開口部２３が各吹き込み口５に係合される（図１３（ｂ）参照）。このとき、各容器２１は、各開口部２３が下方を向いた状態になる。また、各収容部２２内にて、上部に圧縮不活性ガスが存在し、この圧縮不活性ガスの下方に鋳物砂が存在した状態になり、圧縮不活性ガスが気圧で鋳物砂を下方に向けて押している状態になる。
（ｅ）各前記開閉部で各開口部２３が開けられ、各収容部２２が開封される。これにより、各収容部２２内に収容されている圧縮不活性ガスの気圧で、各収容部２２内の鋳物砂が各開口部２３から噴出して、各流路４を通じて金型１ｃのキャビティ内に吹き込まれる。
（ｆ）所定時間経過後（各収容部２２内の鋳物砂の噴出完了後）、金型１ｃのキャビティ内に吹き込まれた鋳物砂にアミンガスが吹き付けられる。そして、アミンガスの作用により金型１ｃのキャビティ内の鋳物砂が硬化して、砂鋳型になる。 (A) Nine containers 21, 21... Are prepared (see FIG. 13A).
(B) In each accommodating part 22 of each container 21, foundry sand and the compressed inert gas (gas which suppresses hardening of foundry sand) are accommodated, respectively.
(C) Each opening part 23 is closed by each said opening-and-closing part, and each accommodating part 22 is sealed. That is, the molding sand and the compressed inert gas (compressed inert gas) are sealed in each housing portion 22.
(D) Each opening 23 is engaged with each blowing port 5 in a state where the upper mold 2c and the lower mold 3c of the mold 1c are abutted (see FIG. 13B). At this time, each container 21 is in a state in which each opening 23 faces downward. Moreover, in each accommodating part 22, compression inert gas exists in the upper part, it will be in the state where casting sand existed under this compression inert gas, and compression inert gas turns casting sand downward by atmospheric pressure. Will be pressed.
(E) Each opening part 23 is opened by each said opening-and-closing part, and each accommodating part 22 is opened. Thereby, the casting sand in each accommodating part 22 is ejected from each opening 23 at the pressure of the compressed inert gas accommodated in each accommodating part 22, and the inside of the cavity of the mold 1 c is passed through each flow path 4. Be blown into.
(F) After a predetermined time has elapsed (after completion of the ejection of the foundry sand in each housing portion 22), amine gas is blown onto the foundry sand that has been blown into the cavity of the mold 1c. Then, the casting sand in the cavity of the mold 1c is hardened by the action of the amine gas to form a sand mold.

なお、金型１ｃとは種類が異なる金型のキャビティ内に鋳物砂を吹き込むときは、上記（ａ）において当該種類が異なる金型に形成される吹き込み口５・５・・・の数と同数の容器２１・２１・・・を用意すればよい。以後は、上記（ｂ）〜（ｆ）に基づいて、用意した各容器２１の各収容部２２内への鋳物砂及び圧縮不活性ガスの収容作業、各収容部２２の密封作業、各収容部２２の各開口部２３の各吹き込み口５への係合作業、各収容部２２の開封作業、アミンガスの供給作業を行えばよい。   When casting sand is blown into a cavity of a mold of a different type from the mold 1c, the same number as that of the blow ports 5, 5,... Formed in the mold of the different type in (a) above. ... May be prepared. Thereafter, based on the above (b) to (f), the containing sand and the compressed inert gas are accommodated in the accommodating portions 22 of the prepared containers 21, the sealing operations of the accommodating portions 22, and the accommodating portions. What is necessary is just to perform the engagement operation | work to each blowing inlet 5 of each opening part 23 of 22, the opening operation | work of each accommodating part 22, and the supply operation | work of amine gas.

以上のように構成することで、各容器２１がユニット化されて互いに独立しているので、各収容部２２の各開口部２３の位置関係を自由に設定できる。これにより、様々な種類の金型に対応できる。また、種類が異なる金型に用いる場合でも、鋳物砂の吹き込み対象となる金型に形成される吹き込み口５・５・・・の数と同数の容器２１・２１・・・を用意すれば、以後は上記（ｂ）〜（ｆ）に基づいて各種作業を行えばよく、煩雑な作業を要しない。従って、汎用性に優れ、種類の異なる金型に対しても容易に対応することができる。   By configuring as described above, since each container 21 is unitized and independent from each other, the positional relationship of each opening 23 of each housing portion 22 can be freely set. Thereby, it can respond to various kinds of metal molds. In addition, even when using different types of molds, if the same number of containers 21... 21 as the number of blow ports 5, 5. Thereafter, various operations may be performed based on the above (b) to (f), and complicated operations are not required. Therefore, it is excellent in versatility and can easily cope with different types of molds.

また、鋳物砂（詳細には、鋳物砂に含まれる粘結剤）は、大気中では時間経過と共に硬化していき、短時間（通常３０分程）で硬化を完了してしまう。
本実施形態では上記（ｂ）及び（ｃ）に示すように、各収容部２２内に圧縮不活性ガスを封入して、各収容部２２内の鋳物砂が大気と接触することを防止している。これにより、不活性ガスの作用で各収容部２２内の鋳物砂の硬化を抑制できるので、各収容部２２内の鋳物砂の長期保存・使用時間の延長が可能になる。なお、不活性ガスに代えて窒素ガスを用いてもよい。 In addition, the foundry sand (specifically, the binder contained in the foundry sand) hardens with time in the atmosphere and completes in a short time (usually about 30 minutes).
In this embodiment, as shown in the above (b) and (c), the compressed inert gas is sealed in each accommodating portion 22 to prevent the foundry sand in each accommodating portion 22 from coming into contact with the atmosphere. Yes. Thereby, since hardening of the foundry sand in each accommodating part 22 can be suppressed by the action of the inert gas, it becomes possible to extend the long-term storage and use time of the foundry sand in each accommodated part 22. Nitrogen gas may be used instead of the inert gas.

また、各収容部２２の内周面に傾斜部２４をそれぞれ設けることにより、上記（ｅ）において圧縮不活性ガスの気圧を付加された各収容部２２内の鋳物砂が各開口部２３へと誘導される。これにより、各収容部２３内の鋳物砂を全て各開口部２３から噴出でき、各収容部２２内に鋳物砂が残留することを防止できる。   Further, by providing the inclined portion 24 on the inner peripheral surface of each accommodating portion 22, the foundry sand in each accommodating portion 22 to which the pressure of the compressed inert gas is added in the above (e) is passed to each opening 23. Be guided. Thereby, all the casting sand in each accommodating part 23 can be ejected from each opening part 23, and it can prevent that casting sand remains in each accommodating part 22. FIG.

また、上記（ｂ）において各収容部２２内に圧縮不活性ガスを収容する際、収容部２２毎に収容する圧縮不活性ガスの気圧の高さを、金型１のキャビティ内における各収容部２２内の鋳物砂が吹き込まれる部分の各形状に応じて適宜設定することにより、上記（ｅ）において圧縮不活性ガスの気圧で鋳物砂を金型１のキャビティ内に吹き込む際、鋳物砂にかかる圧縮不活性ガスの気圧を最適化できる。
また、上記（ｂ）において各収容部２２内に鋳物砂を収容する際、収容部２２毎に収容する鋳物砂の種類（砂の種類・粒径や、粘結剤の種類・濃度等）を、金型１のキャビティの形状に応じて適宜設定することにより、上記（ｆ）において造型された砂鋳型の強度（崩壊性）を部分毎に狙った大きさにでき、最適化できる。さらに、鋳物砂を無駄なく使え、鋳物砂の材料費を低減できる。
また、上記（ｂ）において各収容部２２内に鋳物砂を収容する際、収容部１３毎に収容する鋳物砂の量を、金型１のキャビティの形状に応じて適宜設定することにより、鋳物砂の使用量を最適化でき、鋳物砂を無駄なく使える。 Further, when the compressed inert gas is accommodated in each accommodating portion 22 in (b) above, the height of the pressure of the compressed inert gas accommodated for each accommodating portion 22 is set to each accommodating portion in the cavity of the mold 1. When the molding sand is blown into the cavity of the mold 1 in the pressure of the compressed inert gas in the above (e), the casting sand is applied to the molding sand by appropriately setting depending on the shape of the portion into which the molding sand in 22 is blown. The pressure of the compressed inert gas can be optimized.
In addition, when the foundry sand is accommodated in each accommodating portion 22 in the above (b), the type of foundry sand to be accommodated for each accommodating portion 22 (sand type / particle size, binder type / concentration, etc.). By setting appropriately according to the shape of the cavity of the mold 1, the strength (disintegration) of the sand mold formed in the above (f) can be set to a target size and optimized. Further, the foundry sand can be used without waste, and the material cost of the foundry sand can be reduced.
Further, when the foundry sand is accommodated in each accommodating portion 22 in the above (b), the amount of foundry sand accommodated for each accommodating portion 13 is appropriately set according to the shape of the cavity of the mold 1, thereby allowing the foundry to be cast. The amount of sand used can be optimized and casting sand can be used without waste.

また、上記（ｅ）に示すように各収容部２２内に収容さていれる圧縮不活性ガスの気圧で、各収容部２２内の鋳物砂を金型１のキャビティ内に吹き込むように構成し、エア供給装置等を用いない。従って、装置構成を簡素化でき、さらに金型１のキャビティ内に鋳物砂を吹き込む際に使用するエネルギー量を低減できる。   Further, as shown in the above (e), the molding sand in each accommodating portion 22 is blown into the cavity of the mold 1 at the pressure of the compressed inert gas accommodated in each accommodating portion 22, and the air Do not use a supply device. Therefore, the apparatus configuration can be simplified, and the amount of energy used when casting sand is blown into the cavity of the mold 1 can be reduced.

なお、上記（ａ）〜（ｃ）の工程に代えて以下の（ａ１）、（ｂ１）の工程を行うように構成してもよい。
（ａ１）収容部２２内に鋳物砂及び圧縮不活性ガスを封入されている容器２１が予め多数用意される。
（ｂ１）上記（ａ１）において用意された多数の容器２１・２１・・・の中から金型の種類毎に必要な数（本実施形態では九つ）の各容器２１が選択される。
以後は、上記（ｂ１）において選択された各容器２１を使って上記（ｄ）〜（ｆ）に基づいた作業が行われる。
前述のように、容器２１の収容部２２内には圧縮不活性ガスが封入されており、収容部２２内の鋳物砂の長期保存ができるので、このような収容部２２内に鋳物砂及び圧縮不活性ガスが封入されている容器２１を予め多数用意しておく構成が可能になる。 In addition, it may replace with the process of said (a)-(c), and you may comprise so that the process of the following (a1) and (b1) may be performed.
(A1) A large number of containers 21 filled with foundry sand and compressed inert gas are prepared in advance in the accommodating portion 22.
(B1) The required number (nine in the present embodiment) of each container 21 is selected for each type of mold from the large number of containers 21, 21... Prepared in (a1) above.
Thereafter, the operations based on the above (d) to (f) are performed using each container 21 selected in the above (b1).
As described above, the compressed inert gas is sealed in the housing portion 22 of the container 21, and the foundry sand in the housing portion 22 can be stored for a long time. A configuration in which a large number of containers 21 filled with inert gas are prepared in advance becomes possible.

１ 金型
５ 吹き込み口
１０ 鋳物砂の吹き込み装置
１１ 容器
１２ エアホース
１３ 収容部
１４ ノズル部 1 Mold 5 Blowing Port 10 Casting Sand Blowing Device 11 Container 12 Air Hose 13 Housing 14 Nozzle

Claims (15)

砂鋳型造型用の型の外周面に形成されると共に前記型のキャビティに連通する複数の吹き込み口を通じて、前記型のキャビティ内に鋳物砂を吹き込む鋳物砂の吹き込み装置であって、
内部に前記鋳物砂を収容可能な収容部、及び前記収容部内に収容される前記鋳物砂を噴出可能であると共に前記吹き込み口に係合可能な噴出部を有する容器を前記複数の吹き込み口の数と同数備える容器群と、
前記容器群の各容器の各収容部に接続され、前記各収容部内に気体を供給することにより、供給した前記気体の気圧で前記各収容部内の鋳物砂を前記型のキャビティ内に吹き込む気体供給手段とを備える鋳物砂の吹き込み装置。 A molding sand blowing device for blowing molding sand into the mold cavity through a plurality of blowing ports formed on the outer peripheral surface of the mold for sand mold molding and communicating with the cavity of the mold,
A container having an accommodating portion capable of accommodating the foundry sand therein, and an ejecting portion capable of ejecting the foundry sand accommodated in the accommodating portion and engageable with the blowing port. A container group comprising the same number as
A gas supply that is connected to each container of each container of the container group, and blows casting sand in each container into the cavity of the mold by supplying gas into each container. A foundry sand blowing device comprising means. 前記気体供給手段は、前記各収容部内に供給する気体の気圧を前記収容部毎に制御可能である請求項１に記載の鋳物砂の吹き込み装置。   2. The foundry sand blowing apparatus according to claim 1, wherein the gas supply means is capable of controlling a pressure of a gas supplied into each of the accommodating portions for each of the accommodating portions. 前記各収容部の内周面には、前記噴出部に向かって傾斜して、前記噴出部に連なる傾斜部が形成される請求項１又は請求項２に記載の鋳物砂の吹き込み装置。   3. The foundry sand blowing device according to claim 1, wherein an inclined portion that is inclined toward the ejection portion and continues to the ejection portion is formed on an inner peripheral surface of each of the housing portions. 前記各収容部に接続され、前記鋳物砂の硬化を促進する気体を前記各収容部を通じて前記型のキャビティ内に供給する硬化ガス供給手段を備える請求項１から請求項３のいずれか一項に記載の鋳物砂の吹き込み装置。   4. The apparatus according to claim 1, further comprising: a curing gas supply unit that is connected to each of the storage units and supplies a gas that accelerates the hardening of the foundry sand into the cavity of the mold through each of the storage units. The casting sand blowing device as described. 砂鋳型造型用の型の外周面に形成されると共に前記型のキャビティに連通する複数の吹き込み口を通じて、前記型のキャビティ内に鋳物砂を吹き込む鋳物砂の吹き込み装置であって、
内部に前記鋳物砂及び圧縮気体を収容可能な中空形状に形成されると共に、前記吹き込み口に係合可能な開口部を有する収容部と、
前記開口部を閉じることにより前記収容部を密封し、前記開口部を開けることにより前記収容部を開封する開閉部と、
を有する容器を、前記複数の吹き込み口の数と同数備える鋳物砂の吹き込み装置。 A molding sand blowing device for blowing molding sand into the mold cavity through a plurality of blowing ports formed on the outer peripheral surface of the mold for sand mold molding and communicating with the cavity of the mold,
A housing portion that is formed in a hollow shape that can accommodate the foundry sand and compressed gas therein, and that has an opening that can be engaged with the blowing port;
An opening / closing portion that seals the housing portion by closing the opening portion, and opens the housing portion by opening the opening portion;
A foundry sand blowing device provided with the same number of containers as the number of the plurality of blowing ports. 前記圧縮気体は、前記鋳物砂の硬化を抑制する気体である請求項５に記載の鋳物砂の吹き込み装置。   6. The foundry sand blowing device according to claim 5, wherein the compressed gas is a gas that suppresses hardening of the foundry sand. 前記各容器の各収容部の内周面には、前記開口部に向かって傾斜して、前記開口部に連なる傾斜部が形成される請求項５又は請求項６に記載の鋳物砂の吹き込み装置。   7. The foundry sand blowing device according to claim 5, wherein an inclined portion that is inclined toward the opening and is continuous with the opening is formed on an inner peripheral surface of each container of each container. . 砂鋳型造型用の型の外周面に形成されると共に前記型のキャビティに連通する複数の吹き込み口を通じて、前記型のキャビティ内に鋳物砂を吹き込む鋳物砂の吹き込み方法であって、
内部に前記鋳物砂を収容可能な収容部、及び前記収容部内に収容される前記鋳物砂を噴出可能であると共に前記吹き込み口に係合可能な噴出部を有する容器を前記複数の吹き込み口の数と同数用意して、
前記各容器の各収容部内に前記鋳物砂を収容して、
前記各容器の各噴出部を前記複数の吹き込み口にそれぞれ係合して、
前記各容器の各収容部内に気体を供給することにより、供給した前記気体の気圧で前記各収容部内の鋳物砂を前記型のキャビティ内に吹き込む鋳物砂の吹き込み方法。 A molding sand blowing method for blowing molding sand into the mold cavity through a plurality of blowing ports formed on the outer peripheral surface of the mold for sand mold molding and communicating with the mold cavity,
A container having an accommodating portion capable of accommodating the foundry sand therein, and an ejecting portion capable of ejecting the foundry sand accommodated in the accommodating portion and engageable with the blowing port. Prepare the same number as
Accommodating the foundry sand in each accommodating part of each container;
Engage each ejection part of each container with the plurality of blowing ports,
A method for blowing foundry sand, wherein gas is supplied into each housing portion of each container, and the foundry sand in each housing portion is blown into the cavity of the mold by the pressure of the supplied gas. 前記各収容部内に供給される気体の気圧は、前記金型のキャビティ内における前記各収容部内の鋳物砂が吹き込まれる部分の各形状に応じて設定される請求項８に記載の鋳物砂の吹き込み方法。   9. The foundry sand blowing according to claim 8, wherein the pressure of the gas supplied into each housing portion is set according to each shape of a portion into which the molding sand in each housing portion is blown in the cavity of the mold. Method. 前記各収容部内に収容される鋳物砂の種類は、前記金型のキャビティ内における前記各収容部内の鋳物砂が吹き込まれる部分の各形状に応じて設定される請求項８又は請求項９に記載の鋳物砂の吹き込み方法。   The kind of foundry sand accommodated in each said accommodating part is set according to each shape of the part in which the foundry sand in each said accommodating part in the cavity of the said metal mold | die is blown. Casting sand blowing method. 前記各収容部内に収容される鋳物砂の量は、前記金型のキャビティ内における前記各収容部内の鋳物砂が吹き込まれる部分の各形状に応じて設定される請求項８から請求項１０のいずれか一項に記載の鋳物砂の吹き込み方法。   The amount of foundry sand accommodated in each of the accommodating portions is set according to each shape of the portion into which the foundry sand in each of the accommodating portions is blown in the cavity of the mold. The casting sand blowing method according to claim 1. 砂鋳型造型用の型の外周に形成されると共に前記型のキャビティに連通する複数の吹き込み口を通じて、前記型のキャビティ内に鋳物砂を吹き込む鋳物砂の吹き込み方法であって、
内部に前記鋳物砂及び圧縮気体を収容可能な中空形状に形成されると共に、前記吹き込み口に係合可能な開口部を有する収容部と、前記開口部を閉じることにより前記収容部を密封し、前記開口部を開けることにより前記収容部を開封する開閉部と、を有する容器を前記複数の吹き込み口の数と同数用意して、
前記各容器の各収容部内に前記鋳物砂及び前記圧縮気体を収容して、
前記各開閉部で前記各開口部を閉じることにより前記各収容部を密封して、
前記各容器の前記開口部を前記複数の吹き込み口にそれぞれ係合して、
前記各開閉部で前記各開口部を開けることにより前記各収容部を開封し、前記各収容部内の圧縮気体の気圧で前記各収容部内の鋳物砂を前記型のキャビティ内に吹き込む鋳物砂の吹き込み方法。 A molding sand blowing method for blowing molding sand into the mold cavity through a plurality of blowing ports formed on the outer periphery of the mold for sand mold molding and communicating with the mold cavity,
It is formed in a hollow shape capable of accommodating the foundry sand and compressed gas therein, and has an accommodating portion having an opening engageable with the blowing port, and sealing the accommodating portion by closing the opening, Opening and closing the container to open the opening, and preparing the same number of containers as the number of the plurality of blowing ports,
The casting sand and the compressed gas are accommodated in each accommodating portion of each container,
By sealing each opening by closing each opening with each opening and closing part,
Engage the openings of each container with the plurality of blowing ports,
Blowing of foundry sand that opens each of the openings by opening and closing each of the opening and closing parts, and blows the foundry sand in each of the contained parts into the cavity of the mold with the pressure of the compressed gas in each of the contained parts. Method. 前記各収容部内に収容される圧縮気体の気圧は、前記金型のキャビティ内における前記各収容部内の鋳物砂が吹き込まれる部分の各形状に応じて設定される請求項１２に記載の鋳物砂の吹き込み方法。   The pressure of the compressed gas accommodated in each said accommodating part is set according to each shape of the part into which the molding sand in each said accommodating part in the said cavity is blown in the cavity of the said metal mold | die. Blowing method. 前記各収容部内に収容される鋳物砂の種類は、前記金型のキャビティ内における前記各収容部内の鋳物砂が吹き込まれる部分の各形状に応じて設定される請求項１２又は請求項１３に記載の鋳物砂の吹き込み方法。   The kind of foundry sand accommodated in each said accommodating part is set according to each shape of the part into which the foundry sand in each said accommodating part in the cavity of the said metal mold | die is blown. Casting sand blowing method. 前記各収容部内に収容される鋳物砂の量は、前記金型のキャビティ内における前記各収容部内の鋳物砂が吹き込まれる部分の各形状に応じて設定される請求項１２から請求項１４のいずれか一項に記載の鋳物砂の吹き込み方法。   The amount of foundry sand accommodated in each of the accommodating portions is set according to each shape of a portion into which the foundry sand in each of the accommodating portions is blown in the cavity of the mold. The casting sand blowing method according to claim 1.
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