JP2973501B2 - Pressure casting method - Google Patents
Pressure casting methodInfo
- Publication number
- JP2973501B2 JP2973501B2 JP2250891A JP25089190A JP2973501B2 JP 2973501 B2 JP2973501 B2 JP 2973501B2 JP 2250891 A JP2250891 A JP 2250891A JP 25089190 A JP25089190 A JP 25089190A JP 2973501 B2 JP2973501 B2 JP 2973501B2
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- pressure
- casting space
- valve
- casting
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Landscapes
- Producing Shaped Articles From Materials (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、衛生陶器、陶器製タンク、陶芸品等の生素
地成形体を得るための加圧鋳込み成形方法に関する。Description: TECHNICAL FIELD The present invention relates to a pressure casting method for obtaining a green body molded article such as sanitary ware, a ceramic tank, and a pottery product.
（従来の技術） 従来、加圧泥漿鋳込み成形方法として特公平２−1732
6号号に係るものがある。この方法は、公報の第１図に
おいて耐圧容器２にろ過材層３を内張りし、このろ過材
層３の内部に鋳込空間４を形成し、底部の泥漿供給管６
から低圧ポンプにより上記鋳込空間４へ泥漿が供給され
る。泥漿は鋳込み空間４に充満した後、上方に設けられ
た空気抜き管33の途中まで上昇し、空気抜き管33上端の
弁11をオーバーフローすることはない。(Prior art) Conventionally, a pressurized slurry casting method has been disclosed in
There is one related to No. 6. In this method, a filter medium layer 3 is lined in a pressure vessel 2 in FIG. 1 of the publication, a casting space 4 is formed inside the filter medium layer 3, and a slurry supply pipe 6 at the bottom is formed.
Is supplied to the casting space 4 by a low-pressure pump. After the slurry fills the casting space 4, it rises to the middle of the air vent pipe 33 provided above, and does not overflow the valve 11 at the upper end of the air vent pipe 33.
（発明が解決しようとする課題） 従来の技術の方法では鋳込み空間内への泥漿の供給
を、空気抜き管33の上端に設けた弁11の高さ位置に相当
する水頭圧以下で且つ鋳込み空間内に泥漿を充満させる
に必要な水頭圧の泥漿、即ち11から泥漿がオーバーフロ
ーしないような低い圧力の泥漿で行うので、次のような
問題があった。(Problems to be Solved by the Invention) In the method of the related art, the supply of the slurry into the casting space is performed at a water head pressure equal to or lower than the height position of the valve 11 provided at the upper end of the air vent pipe 33 and in the casting space. However, since the operation is performed using a slurry having a head pressure necessary for filling the slurry with the slurry, that is, a slurry having a low pressure such that the slurry does not overflow from 11, the following problems occur.
（１）泥漿供給圧力が低いので、鋳込み空間内に泥漿が
充満するまでに時間がかかり、生産時間の短縮化の妨げ
となっている。(1) Since the slurry supply pressure is low, it takes time until the slurry is filled in the casting space, which hinders a reduction in production time.
（２）成形体の大きさによって鋳型の寸法が異なり空気
抜き管の上端に設けた弁の高さが変わると、それに応じ
て泥漿供給圧力を調節しなければならず手間がかかって
いる。(2) If the height of the valve provided at the upper end of the air vent pipe changes depending on the size of the mold depending on the size of the molded product, the slurry supply pressure must be adjusted accordingly, which is troublesome.
そこで本発明は、上記課題を解決し、生産効率を向上
させることができる加圧鋳込み成形方法を提供すること
にある。Therefore, an object of the present invention is to provide a pressure casting method capable of solving the above-mentioned problems and improving the production efficiency.
（課題を解決するための手段および作用） 複数の分割鋳型で泥漿鋳込み空間を形成し、前記泥漿
鋳込み空間に型外に設けられ一端に弁を設けた空気抜き
管の他端と型外に設けられた泥漿供給管とを連通させ、
前記鋳込み空間に泥漿を供給して充満させ、充満後前記
鋳込み空間内の泥漿を加圧する加圧鋳込み成形方法にお
いて、 前記空気抜き管の他端に設けた弁からオーバーフロー
する圧力の泥漿を前記鋳込み空間内へ供給する工程と、
泥漿が前記弁の位置に到達する前に前記弁を閉じる工程
と、 泥漿を前記鋳込み空間に充満させた後に前記鋳込み空
間内の泥漿を加圧する工程とからなり、前記弁を閉じる
工程を泥漿の前記鋳込み空間内への供給開始から所定時
間経過後に行うことを特徴とする。(Means and Actions for Solving the Problems) A slurry casting space is formed by a plurality of split molds, and is provided outside the mold in the slurry casting space, and is provided outside the mold at the other end of the air vent pipe provided with a valve at one end. To the sludge supply pipe,
In the pressure casting method of supplying and filling the slurry in the casting space and pressurizing the slurry in the casting space after the filling, the slurry having a pressure overflowing from a valve provided at the other end of the air vent pipe is filled in the casting space. Supplying to the inside,
Closing the valve before the slurry reaches the position of the valve; and pressurizing the slurry in the casting space after filling the casting space with the slurry. The process is performed after a lapse of a predetermined time from the start of supply into the casting space.
空気抜きの弁を閉じる工程では、弁の閉じるタイミン
グは泥漿の供給開始から所定時間経過した時点である。
所定時間に達すると同時に空気抜きの弁を閉じるので、
オーバーフローの防止が容易である。In the step of closing the air vent valve, the valve is closed at a point in time when a predetermined time has elapsed from the start of the supply of the slurry.
As soon as the predetermined time is reached, the air vent valve is closed,
It is easy to prevent overflow.
供給する泥漿の圧力としては、高い程泥漿の充満時間
を短縮できるが、あまり高すぎると泥漿の流速が速くな
り鋳込み当初に空気を泥漿中に巻き込み、ピンホールが
発生しやすく、また、低すぎると鋳込みに時間がかか
る。そのため0.5〜7kg/cm2Gの圧力が好ましく、更に
は、１〜5kg/cm2Gの圧力が好ましい。As the pressure of the supplied slurry, the higher the pressure of the slurry, the shorter the filling time of the slurry. And it takes time to cast. Therefore, a pressure of 0.5 to 7 kg / cm 2 G is preferable, and a pressure of 1 to 5 kg / cm 2 G is more preferable.
（実施例） 本発明の実施例を添付図面に基づいて以下に説明す
る。(Example) An example of the present invention will be described below with reference to the accompanying drawings.
第１図は本発明に係る洗面器を成形する加圧鋳込み成
形装置である。図示せぬ型組み・プレス装置で雌型12と
雄型13とを型合わせして鋳込み空間14を形成する。雌型
12の下部には泥漿導入孔12aが開口し、この泥漿導入孔1
2aに泥漿フィードポンプ15からの泥漿供給管16が接続し
ている。FIG. 1 shows a pressure casting apparatus for forming a basin according to the present invention. The female mold 12 and the male mold 13 are mold-matched by a mold assembly and press device (not shown) to form a casting space 14. Female mold
At the lower part of 12, a slurry introduction hole 12a is opened.
A slurry supply pipe 16 from a slurry feed pump 15 is connected to 2a.
泥漿供給管16の途中に、泥漿シリンダ17aと油圧シリ
ンダ17bからなる増圧手段17が接続されている。In the middle of the slurry supply pipe 16, a pressure increasing means 17 including a slurry cylinder 17a and a hydraulic cylinder 17b is connected.
また、泥漿供給管16から排泥管20を下方へ分岐してい
る。Further, the sludge supply pipe 16 branches downward from the slurry supply pipe 16.
雌型12の上部に空気抜き孔12bを開口し、鋳込み空間1
4に連通した空気抜き管22が接続され、この空気抜き管2
2に空気抜き弁23と圧縮空気弁24とが取り付けられてい
る。An air vent hole 12b is opened in the upper part of the female mold 12, and the casting space 1
4 is connected to the air vent pipe 22 and the air vent pipe 2
2 is provided with an air vent valve 23 and a compressed air valve 24.
以上の構成において、排泥弁21、圧縮空気弁24は閉止
し、空気抜き弁23を開け、泥漿供給管16のバルブB1,B2
を開けて泥漿フィードポンプ15を運転し、タンク18の泥
漿（比重:1.8）を鋳込み空間14へ供給する。この時の鋳
込み泥漿の圧力は、3kg/cm2Gで、泥漿の供給開始から18
0秒経過後に空気抜き弁23を閉止し、更に、10秒経過後
に泥漿フィードポンプ15を停止し、バルブB1を閉じる。In the above configuration, the drain valve 21 and the compressed air valve 24 are closed, the air vent valve 23 is opened, and the valves B1 and B2 of the slurry supply pipe 16 are opened.
Is opened and the slurry feed pump 15 is operated to supply the slurry (specific gravity: 1.8) in the tank 18 to the casting space 14. The pressure of the casting slurry at this time was 3 kg / cm 2 G, which was 18
After the elapse of 0 seconds, the air vent valve 23 is closed, and after the elapse of 10 seconds, the slurry feed pump 15 is stopped, and the valve B1 is closed.
次に、増圧手段17の油圧シリンダ17bを伸長作動さ
せ、泥漿シリンダ17aより圧力15kg/cm2Gの泥漿を泥漿供
給管16に圧入し、結果、鋳込み空間14内を15kg/cm2Gに
昇圧し、一定時間保持する。すると、泥漿内の水分が鋳
込み空間14から雌型12、雄型13の外へ排出され、着肉成
形体を形成する。Next, the hydraulic cylinder 17b of the pressure increasing means 17 is extended to operate, and the slurry having a pressure of 15 kg / cm 2 G is pressed into the slurry supply pipe 16 from the slurry cylinder 17a, and as a result, the inside of the casting space 14 is reduced to 15 kg / cm 2 G. Increase the pressure and hold for a certain time. Then, the water in the slurry is discharged from the casting space 14 to the outside of the female mold 12 and the male mold 13 to form an inlaid molded body.
一定時間経過後、増圧手段17を停止し、バルブB2を閉
じ、排泥弁21及び圧縮空気弁24を開け、圧縮空気を鋳込
み空間14内に供給して未着余剰泥漿を型外に強制排出す
る。次に、排泥弁21を閉じて引き続いて所定時間鋳込み
空間14内に圧縮空気を供給して、着肉成形体から水分を
型外へ排出させる。After a certain period of time, the pressure increasing means 17 is stopped, the valve B2 is closed, the mud discharge valve 21 and the compressed air valve 24 are opened, and compressed air is supplied into the casting space 14 to forcibly remove undeposited excess mud from the mold. Discharge. Next, the drainage valve 21 is closed, and subsequently, compressed air is supplied into the casting space 14 for a predetermined time to discharge moisture from the inlaid molded body to the outside of the mold.
所定時間経過後、圧縮空気の鋳込み空間14内への供給
を停止し、着肉成形体を型から取り出す。この成形体の
脱型中にバルブB2を閉じ、バルブB1を開けて泥漿フィー
ドポンプ15を運転して泥漿を泥漿シリンダ17aへ補充し
ておく。After a lapse of a predetermined time, the supply of the compressed air into the casting space 14 is stopped, and the inlaid molding is removed from the mold. During the removal of the molded product, the valve B2 is closed, the valve B1 is opened, and the slurry feed pump 15 is operated to replenish the slurry into the slurry cylinder 17a.
本実施例では、鋳込み泥漿の圧力が3kg/cm2Gで、雌型
12の上部に設けている空気抜き弁23と圧縮空気弁24の高
さの水頭圧より遙かに高く、オーバーフローする程の圧
力ではあるが、オーバーフローさせないために鋳込み空
間14の容積、泥漿導入孔12aの口径、泥漿の比重等を考
慮して180秒間泥漿供給し、空気抜き管23を閉じた後更
に10秒間供給して鋳込み空間を充満させている。In this example, the pressure of the casting slurry was 3 kg / cm 2 G,
It is much higher than the head pressure of the air vent valve 23 and the compressed air valve 24 provided at the upper part of 12 and the pressure is such that it overflows, but in order to prevent overflow, the volume of the casting space 14 and the slurry introduction hole 12a The slurry is supplied for 180 seconds in consideration of the caliber, specific gravity of the slurry, and the like, and is further supplied for 10 seconds after closing the air vent pipe 23 to fill the casting space.
空気抜き管23を閉じた後の泥漿供給を泥漿フィードポ
ンプ15を運転して行ってはいるが、増圧手段17で供給し
てもよい。Although the slurry supply after closing the air vent pipe 23 is performed by operating the slurry feed pump 15, the slurry may be supplied by the pressure increasing means 17.
鋳込み空間への泥漿充満時間は、鋳込み空間の内容
積、鋳込み空間の高さ、泥漿の圧力、泥漿の比重によっ
て異なるので、それぞれの条件に応じて設定すればよ
い。The time for filling the casting space with the slurry varies depending on the internal volume of the casting space, the height of the casting space, the pressure of the slurry, and the specific gravity of the slurry, and may be set according to each condition.
（発明の効果） 以上に述べた通り本発明によれば、空気抜きの弁から
オーバーフローする圧力で泥漿を鋳込み空間内へ供給す
る。泥漿がオーバーフローする比較的高い圧力で泥漿を
供給するので、短時間で鋳込み空間を充満させることが
できる。(Effects of the Invention) As described above, according to the present invention, the slurry is supplied into the casting space with the pressure that overflows from the air vent valve. Since the slurry is supplied at a relatively high pressure at which the slurry overflows, the casting space can be filled in a short time.
泥漿が弁の位置に到達する前に弁を閉じる。泥漿がオ
ーバーフローする心配がないので、泥漿の圧力を高く設
定できる。Close the valve before the slurry reaches the valve position. Since the slurry does not overflow, the pressure of the slurry can be set higher.
泥漿の供給開始から所定時間経過後に弁を閉じる。所
定時間が経過すると、泥漿は空気抜き弁に差し掛かる。
その時点で空気抜き弁を閉じ、オーバーフローを防止す
る。その結果、高い圧力設定が可能となるので、鋳込み
に要する時間が短縮でき、生産の効率化が図れる。After a lapse of a predetermined time from the start of the supply of the slurry, the valve is closed. After a predetermined period of time, the slurry reaches the vent valve.
At that point, the air vent valve is closed to prevent overflow. As a result, a high pressure can be set, so that the time required for pouring can be reduced, and production efficiency can be improved.
所定時間を鋳込み空間の内容積、鋳込み空間の高さ、
泥漿の圧力、泥漿の比重により設定する。鋳込み空間の
内容積、鋳込み空間の高さ、泥漿の圧力、泥漿の比重が
異なっても、鋳込み時間の設定の長短で簡単に対応でき
るので成形サイクルが安定し生産効率が向上する。The predetermined time is the internal volume of the casting space, the height of the casting space,
Set by the pressure of the slurry and the specific gravity of the slurry. Even if the internal volume of the casting space, the height of the casting space, the pressure of the slurry, and the specific gravity of the slurry are different, the setting of the casting time can be easily performed with a short or long setting, so that the molding cycle is stabilized and the production efficiency is improved.
供給する泥漿の圧力が0.5〜7kg/cm2Gである。0.5kg/c
m2G以上にしたので、鋳込みに時間がかからず、生産効
率の向上を図ることができる。一方、圧力を7kg/cm2G以
下としたので、泥漿の流速が速くなり過ぎることはな
く、鋳込み当初に泥漿中に空気を巻き込んでピンホール
を発生させる心配がない。The pressure of the supplied slurry is 0.5-7 kg / cm 2 G. 0.5kg / c
Since it is set to m 2 G or more, casting does not take much time, and the production efficiency can be improved. On the other hand, since the pressure is set to 7 kg / cm 2 G or less, the flow rate of the slurry does not become too fast, and there is no fear that air is entrapped in the slurry at the beginning of casting to generate pinholes.
第１図は本発明に係る洗面器を形成する加圧鋳込み成形
装置図である。 12……雌型、13……雄型 14……鋳込み空間、17……増圧手段 22……空気抜き管 23……空気抜き弁（空気抜き管の他端に設けた弁）FIG. 1 is a view of a pressure casting apparatus for forming a basin according to the present invention. 12 ... female type, 13 ... male type 14 ... casting space, 17 ... pressure increasing means 22 ... air vent pipe 23 ... air vent valve (a valve provided at the other end of the air vent pipe)
フロントページの続き (56)参考文献 特開 昭60−82303（ＪＰ，Ａ) 特開 昭62−42805（ＪＰ，Ａ) 特公 平２−17326（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) B28B 1/26 102 Continuation of the front page (56) References JP-A-60-82303 (JP, A) JP-A-62-42805 (JP, A) JP-B-2-17326 (JP, B2) (58) Fields investigated (Int) .Cl. 6 , DB name) B28B 1/26 102
Claims (3)
し、 前記泥漿鋳込み空間に型外に設けられ一端に弁を設けた
空気抜き管の他端と型外に設けられた泥漿供給管とを連
通させ、 前記鋳込み空間に泥漿を供給して充満させ、充満後前記
鋳込み空間内の泥漿を加圧する加圧鋳込み成形方法にお
いて、 前記空気抜き管の一端に設けた弁からオーバーフローす
る圧力の泥漿を前記鋳込み空間内へ供給する工程と、 泥漿が前記弁の位置に到達する前に前記弁を閉じる工程
と、 泥漿を前記鋳込み空間に充満させた後に前記鋳込み空間
内の泥漿を加圧する工程とからなり、 前記弁を閉じる工程を泥漿の前記鋳込み空間内への供給
開始から所定時間経過後に行うことを特徴とする加圧鋳
込み成形方法。1. A slurry casting space is formed by a plurality of divided molds, and the other end of an air vent pipe provided outside the mold and provided with a valve at one end in the slurry casting space and a slurry supply pipe provided outside the mold. In the pressure casting method for supplying and filling the slurry in the casting space and pressurizing the slurry in the casting space after filling, the slurry having a pressure overflowing from a valve provided at one end of the air vent pipe is provided. Feeding the casting space, closing the valve before the slurry reaches the position of the valve, and pressurizing the slurry in the casting space after filling the casting space with the slurry. A pressure casting method wherein the step of closing the valve is performed after a lapse of a predetermined time from the start of supply of the slurry into the casting space.
み空間の高さ、泥漿の圧力、泥漿の比重の中から選ばれ
るいずれか一つの条件あるいはそれらの組合せにより設
定することを特徴とする請求項１記載の加圧鋳込み成形
方法。2. The method according to claim 1, wherein the predetermined time is set according to any one of conditions selected from an inner volume of the casting space, a height of the casting space, a pressure of the slurry, and a specific gravity of the slurry, or a combination thereof. The pressure casting method according to claim 1.
であることを特徴とする請求項１又は請求項２記載の加
圧鋳込み成形方法。3. The pressure of the supplied slurry is 0.5 to 7 kg / cm 2 G.
The pressure casting method according to claim 1 or 2, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2250891A JP2973501B2 (en) | 1990-09-20 | 1990-09-20 | Pressure casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2250891A JP2973501B2 (en) | 1990-09-20 | 1990-09-20 | Pressure casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04128004A JPH04128004A (en) | 1992-04-28 |
| JP2973501B2 true JP2973501B2 (en) | 1999-11-08 |
Family
ID=17214563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2250891A Expired - Fee Related JP2973501B2 (en) | 1990-09-20 | 1990-09-20 | Pressure casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2973501B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117024226A (en) * | 2023-07-17 | 2023-11-10 | 西安近代化学研究所 | Method for controlling flow of casting liquid of granule casting propellant |
-
1990
- 1990-09-20 JP JP2250891A patent/JP2973501B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04128004A (en) | 1992-04-28 |
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