JPS5823180B2 - Sand blowing device in automatic molding machine - Google Patents
Sand blowing device in automatic molding machineInfo
- Publication number
- JPS5823180B2 JPS5823180B2 JP56026167A JP2616781A JPS5823180B2 JP S5823180 B2 JPS5823180 B2 JP S5823180B2 JP 56026167 A JP56026167 A JP 56026167A JP 2616781 A JP2616781 A JP 2616781A JP S5823180 B2 JPS5823180 B2 JP S5823180B2
- Authority
- JP
- Japan
- Prior art keywords
- sand
- mold
- compressed air
- flask
- molding machine
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/28—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Description
【発明の詳細な説明】
この発明は、自動造型機に於ける砂吹き込み装置に関し
、特に圧縮空気利用自動造型機に於ける砂吹き込み装置
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sand blowing device for an automatic molding machine, and more particularly to a sand blowing device for an automatic molding machine using compressed air.
従来鋳型成形には、(1)人手により生砂をスコップ等
で鋳枠内に入れて搗き固める方法、(2)生砂をコンベ
アを介して鋳枠内に流入させ又はホッパの口を開閉して
鋳枠内に充填させ、ジョルト・スクイズ型モールディン
グ・マシンにより圧縮して固める方法、(3)サンド・
スリンガ等の羽根車を回転して生砂を飛散させf、fが
ら鋳枠内に圧入させ、搗き固める方法、(4)圧縮空気
により砂を鋳枠内に吹き込み、スクイズして固めるブロ
ー・アンド・スクイズ型の装置がある。Conventional mold forming methods include (1) manually putting raw sand into the flask with a shovel or the like and pounding it to harden it; (2) letting the raw sand flow into the flask via a conveyor or opening and closing the mouth of a hopper. (3) Filling the mold into a flask and compressing and solidifying it using a jolt squeeze molding machine.
A method of rotating an impeller such as a slinger to scatter the green sand, forcing it into the flask, and pounding it to harden it. (4) A method of blowing sand into the flask with compressed air and squeezing it to harden it.・There is a squeeze type device.
前述(4)の自動造型機に於ける砂吹き込み装置に於い
ては、所望形状の型を入れ、マツチ・プレートを介して
一体とした上下部の鋳枠内に水で適当に湿した生砂を圧
縮空気を介して吹き込み、鋳枠内の砂を上下に揺動させ
て生砂を固めて造型している。In the sand blowing device of the automatic molding machine described in (4) above, a mold of the desired shape is placed, and the green sand is moistened appropriately with water into the upper and lower casting flasks, which are integrated through matte plates. The raw sand is blown into the mold using compressed air, and the sand in the flask is shaken up and down to harden the raw sand and form the mold.
しかし相当の高圧で湿った砂を圧入しても重力の為鋳枠
内にある型の砂吹き込み口に対し裏側や複雑な形状をし
た型の隅々にまでは充分な圧力を持って砂が充填されず
、造型作業に於ける隘路となっている。However, even if wet sand is pressed in at a fairly high pressure, the force of gravity will cause the sand to reach the back side of the mold's sand inlet in the casting flask and into every corner of the complex-shaped mold. It is not filled and becomes a bottleneck in the molding work.
他方鋳枠内の型と砂との間に隙間を生じさせないように
するため、圧縮空気の圧力を上げると鋳枠や型を磨耗す
る欠点がある。On the other hand, if the pressure of compressed air is increased in order to prevent a gap from forming between the mold and the sand in the flask, there is a drawback that the flask and mold will wear out.
そのため吹き込み口の反対側の面や隅又は穴或いは形状
の複雑な型に於いては充分な硬度を有する均一な砂型が
得られず、湯漏れやパリ又は製品の寸法違い等の欠陥を
生ずる。Therefore, in molds with complex shapes, corners, or holes on the opposite side of the blowing port, a uniform sand mold with sufficient hardness cannot be obtained, resulting in defects such as leakage of hot water, cracks, or dimensional differences in the product.
このためこの型の造型機では使用される型が比較的薄く
て形状の簡単な場合のみに限定され、大きな欠点となっ
ている。For this reason, this type of molding machine is limited to applications where the mold is relatively thin and has a simple shape, which is a major drawback.
これらの欠点を除去する為、砂の入り難い個所に新たに
ベント・ホールを取付け、空気を逃して砂を入り易くす
る方法と鋳枠を高くしてスクイズにより補う方法並びに
これらの方法を併用する方法が実施されている。In order to eliminate these drawbacks, we can install new vent holes in areas where it is difficult for sand to enter to allow air to escape and allow sand to enter easily, or raise the casting flask to compensate by squeezing, or use a combination of these methods. method is implemented.
しかしこれらの方法でも充分ではなく砂が余分に必要に
なる最大の欠点がある。However, even these methods are not sufficient and have the biggest drawback of requiring extra sand.
これらの欠点の原因としては、次のことが考えられてい
る。The following are thought to be the causes of these shortcomings.
即ち吹き込み口より鋳枠内に吹き込まれた砂は空気の流
れに乗って流入し、この時砂の粒子は空気の流れにより
影響されなから鋳枠内に充填されるが、空気に比べて重
い為慣性により直進する力が強くなり、吹き込み口より
反対側の面等へは一度鋳枠の側面或いは積み重なった砂
に衝突し、跳ね返ったものが入り、又穴等は砂がその上
を素通りしてしまう為、ベント・ホール等で補助しても
砂が入り難く硬度も不足する。In other words, the sand blown into the flask from the blowing port flows in with the flow of air, and at this time, the sand particles are unaffected by the air flow and are filled into the flask, but they are heavier than air. Therefore, the force to move straight due to inertia becomes strong, and the surface opposite to the blowing port is filled with debris that has hit the side of the flask or the piled up sand and bounced back, and sand passes over the holes etc. As a result, even with assistance with vent holes, etc., it is difficult for sand to enter and the hardness is insufficient.
これは砂の充填速度が極めて速い事にも起因すると考え
られる。This is thought to be due to the fact that the filling speed of sand is extremely fast.
この発明は、前述の圧縮空気を利用した自動造型機に於
ける砂吹き込み装置の問題点に着目して成されたもので
、その要旨は圧縮空気を介して砂を圧入する吹き込み口
のほかに、鋳枠の上下或いは側面に圧縮空気圧入用ノズ
ルを設け、吹き込み時に圧力と時間を制御した圧縮空気
を吹き込んで流入する砂の流れを変え、吹き込み口に対
し型の裏側の面や穴又は隅等にも充分に砂を流入させ、
欠陥がなく均一な硬度を有する砂型の造型が容易且つ迅
速に実施できる砂吹き込み装置を提供する。This invention was made by focusing on the above-mentioned problems with sand blowing devices in automatic molding machines that use compressed air. A compressed air injection nozzle is installed at the top, bottom, or side of the casting flask, and when blowing, compressed air with controlled pressure and time is blown into the flask to change the flow of incoming sand. Let enough sand flow into the
To provide a sand blowing device which can easily and quickly create a sand mold having no defects and having uniform hardness.
図面についてこの発明の詳細な説明する。A detailed description of the invention will be given with reference to the drawings.
第1.2図に於いて、マツチ・プレート11を介して所
望型状の型10を上下部鋳枠12,13内に装置し、上
部鋳枠12の一方の側面に穿設した吹き込み口14に砂
と圧縮空気の供給管15を連結し、該上部鋳枠の側面又
は上面板に穿設した透孔16内に夫々ベント・ホール1
6を嵌合し、型10の砂吹き込み口14に対して裏側や
穴又は砂が流入し難い個所に穿設した透孔17内にノズ
ル18を密着嵌合し、該ノズルに圧縮空気供給管19を
連結する。In FIG. 1.2, a mold 10 of a desired shape is placed in the upper and lower flasks 12 and 13 via a match plate 11, and a blowing port 14 is formed in one side of the upper flask 12. Sand and compressed air supply pipes 15 are connected to the upper flask, and vent holes 1 are formed in the through holes 16 drilled in the side or top plate of the upper flask.
6, and tightly fit the nozzle 18 into the through hole 17 that is bored on the back side of the sand blowing port 14 of the mold 10 or in a hole or a place where sand is difficult to flow in, and connect the compressed air supply pipe to the nozzle. Connect 19.
下部鋳枠13の一方の側面に穿設した砂吹き込み口20
に圧縮空気と砂の供給管21を連結し、該下部鋳枠の側
面又は下面板に穿設した透孔22内に夫々ベント・ホー
ル23を嵌合し、型10の砂吹き込み口20に対して裏
側や隅又は穴或いは砂が流入し難い個所に穿設した透孔
24内にノズル25を密着嵌合し、該ノズルに圧縮空気
供給管26を連結する。Sand blowing port 20 bored on one side of the lower flask 13
A compressed air and sand supply pipe 21 is connected to the mold 10, and a vent hole 23 is fitted into the through hole 22 formed in the side or bottom plate of the lower flask, and the sand injection port 20 of the mold 10 is connected to the vent hole 23. A nozzle 25 is tightly fitted into a through hole 24 made on the back side, a corner, a hole, or a place where sand cannot easily enter, and a compressed air supply pipe 26 is connected to the nozzle.
尚上下部の鋳枠12,13の上下にスクイズ・シリンダ
27.27を夫々圧縮して上下方向に抑圧出来るように
する。Furthermore, squeeze cylinders 27 and 27 are compressed at the top and bottom of the upper and lower flasks 12 and 13, respectively, so that they can be suppressed in the vertical direction.
前述の実施例に於いて、上下部の鋳枠12,13にそれ
らの砂と圧縮空気の吹き込み口14,20のほかに、こ
れら鋳枠の上下或いは側面に圧縮空気圧入用ノズル18
,25を夫々設け、これらノズルを吹き込み口14,2
0に対し型の裏側の面や穴又は隅等の略正面に向け、こ
れら吹き込み口からの圧縮空気による砂の直通流路をノ
ズル18゜25からの圧縮空気によりこれら裏側や隅又
は穴或いは砂が流入し難い個所に砂と圧縮空気との流路
を向かわせ、上下鋳枠内金体に均一な硬度で砂を充填し
、完全な砂型を瞬時に造型出来る。In the above-mentioned embodiment, in addition to sand and compressed air blowing ports 14 and 20 in the upper and lower flasks 12 and 13, compressed air injection nozzles 18 are provided at the top and bottom or on the sides of these flasks.
, 25 are provided respectively, and these nozzles are connected to the blowing ports 14, 2.
Directly direct the sand through the compressed air from these blowing ports to the back side, corners, holes, corners, etc. of the mold with the compressed air from the nozzle 18°25. By directing the flow path of sand and compressed air to areas where it is difficult for sand to flow in, the metal bodies in the upper and lower flasks are filled with sand of uniform hardness, making it possible to instantaneously create a perfect sand mold.
第1図は、この発明に係る砂吹き込み口の実施例の縦断
面図、第2図はその別の実施例の縦断面図である。
10・・・・・・型、11・・・・・・マツチ・プレー
ト、12・・・・・・上部鋳枠、13・・・・・・下部
鋳枠、14 、20・・・・・・砂吹き込み口、15
、21・・・・・・砂と圧縮空気供給管、16・・・・
・・ベント・ホール、17,24・・・・・・透孔、1
8,25・・・・・・ノズル、19,26・・・・・・
圧縮空気供給管。FIG. 1 is a longitudinal cross-sectional view of an embodiment of a sand blowing port according to the present invention, and FIG. 2 is a longitudinal cross-sectional view of another embodiment thereof. 10...Mold, 11...Match plate, 12...Upper flask, 13...Lower flask, 14, 20...・Sand blowing port, 15
, 21... Sand and compressed air supply pipe, 16...
...Vent hole, 17,24...Through hole, 1
8, 25... Nozzle, 19, 26...
Compressed air supply pipe.
Claims (1)
れた上F部鋳枠の核型の吹き込み口に対して裏側、穴又
は隅部の砂が流入し難い個所に対して略正面に圧縮仝気
圧入用ノズルを設け、該吹き込み口から圧縮墾気を介し
て流入される砂と圧縮空気の流れを変えてこれら個所に
も砂を均一の硬度で流入させるようにした自動造製機に
於ける砂吹き込み装置。1. A mold of the desired shape is placed inside through a match plate, and compressed almost in front of the hole or corner where sand is difficult to enter, on the back side of the core mold blowing port of the upper F casting flask. An automatic manufacturing machine that is equipped with a low pressure injection nozzle and changes the flow of sand and compressed air that flow in from the air inlet via compressed air so that sand flows into these locations with uniform hardness. Sand blowing equipment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56026167A JPS5823180B2 (en) | 1981-02-26 | 1981-02-26 | Sand blowing device in automatic molding machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56026167A JPS5823180B2 (en) | 1981-02-26 | 1981-02-26 | Sand blowing device in automatic molding machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57142745A JPS57142745A (en) | 1982-09-03 |
JPS5823180B2 true JPS5823180B2 (en) | 1983-05-13 |
Family
ID=12185981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56026167A Expired JPS5823180B2 (en) | 1981-02-26 | 1981-02-26 | Sand blowing device in automatic molding machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5823180B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5125449A (en) * | 1991-01-02 | 1992-06-30 | Taiyo Chuki Co., Ltd. | Improved molding machine |
US7448429B2 (en) * | 2004-04-28 | 2008-11-11 | Sintokogio Ltd. | Method for squeezing foundry sand, a match plate, and an upper and a lower flask |
US10589347B2 (en) | 2015-06-12 | 2020-03-17 | Disa Industries A/S | Sand moulding machine and method of producing moulds |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS586599Y2 (en) * | 1978-04-21 | 1983-02-04 | 日立金属株式会社 | Core forming equipment |
-
1981
- 1981-02-26 JP JP56026167A patent/JPS5823180B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS57142745A (en) | 1982-09-03 |
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