JPS623704B2 - - Google Patents
Info
- Publication number
- JPS623704B2 JPS623704B2 JP57088635A JP8863582A JPS623704B2 JP S623704 B2 JPS623704 B2 JP S623704B2 JP 57088635 A JP57088635 A JP 57088635A JP 8863582 A JP8863582 A JP 8863582A JP S623704 B2 JPS623704 B2 JP S623704B2
- Authority
- JP
- Japan
- Prior art keywords
- air vent
- mold
- vent
- self
- pin
- 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
- 238000000465 moulding Methods 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 11
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000012778 molding material Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/06—Core boxes
- B22C7/065—Venting means
Description
【発明の詳細な説明】
本発明は吹込式鋳型造型機用金型エアーベン
ト、特にセルフクリーニング式小径エアーベント
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold air vent for a blow mold machine, and more particularly to a self-cleaning small diameter air vent.
従来、吹込式鋳型造型機の金型においては、砂
吹込みに用いられた空気を逸出させるために、複
数個のエアーベントプラグを該金型の適当個所に
埋設してある。この種エアーベントプラグの型式
は大別して第１図にその平面図で示す如きものが
知られている。即ち、第１図Ａはスリツト式ベン
トプラグであり、0.2〜0.3mm巾の多数のスリツト
を設け、このスリツトを通して空気のみを排出さ
せる型式のものであり、第１図Ｂはメツシユ式ベ
ントプラグであり、20〜50メツシユの金網を金属
筒の端面に固着し、該金網を通して空気のみを排
出させる型式のものであり、更に、第１図Ｃは
0.2〜0.3mm厚の金属板を打抜き又はエツチングに
よりスクリーン状に穿孔し、該穿孔金属板を金属
筒端面に固着し、該穿孔を通して空気のみを排出
させる型式のものであり、これら公知のベントプ
ラグは周知の如く、圧縮空気によつて金型内の造
型空所に吹き込まれた造型材（砂及び／又は添加
剤）を造型空所に留置させ、空気のみを逸出させ
る作用・効果を意図するものである。これらのベ
ントプラグは第２図に示す如く金型に装着してあ
る。しかるに、現状の吹込式鋳型造型において
は、砂に粘結剤および／又は硬化剤を添加した混
合物からなる造型材が用いられており、これら添
加剤がベントプラグの開口部に累積し、目づまり
を起し、空気排出の性能が低下し造型する鋳型の
品質を著しく低下（造型材の偏在、硬度の不均一
その他）、する原因となつていることは当業者に
よく知られている欠陥である。 Conventionally, a plurality of air vent plugs are embedded in a mold of a blow-type mold making machine at appropriate locations in order to allow air used for sand blowing to escape. The types of air vent plugs of this kind are broadly classified into those shown in a plan view in FIG. 1. That is, Fig. 1A shows a slit-type vent plug, which has a large number of 0.2 to 0.3 mm wide slits, and only exhausts air through the slits, and Fig. 1B shows a mesh-type vent plug. This is a type in which a wire mesh of 20 to 50 meshes is fixed to the end face of a metal tube, and only air is exhausted through the wire mesh.
This is a type of vent plug in which a metal plate with a thickness of 0.2 to 0.3 mm is punched or etched to form a hole in the shape of a screen, the perforated metal plate is fixed to the end face of a metal cylinder, and only air is exhausted through the hole. As is well known, the purpose is to cause the molding material (sand and/or additives) blown into the molding cavity in the mold by compressed air to remain in the molding cavity, and to allow only the air to escape. It is something to do. These vent plugs are attached to a mold as shown in FIG. However, current blow mold manufacturing uses a molding material made of a mixture of sand with binders and/or hardeners added, and these additives can accumulate in the opening of the vent plug and cause clogging. It is a defect well known to those skilled in the art that this causes the air evacuation performance to deteriorate and the quality of the mold to be molded to be significantly deteriorated (uneven distribution of molding material, uneven hardness, etc.). .
本発明者はかゝる現状に鑑み、種々検討、実験
を重ねた結果、本発明のセルフクリーニング式ベ
ントプラグの開発に成功したものであり、本発明
の構成は前記特許請求の範囲に明記したとおりで
あるが、本発明の一具体例を示す添附図面に基い
て更に詳細に説明する。 In view of the current situation, the present inventor has conducted various studies and experiments, and as a result, has succeeded in developing the self-cleaning vent plug of the present invention, and the structure of the present invention is specified in the claims. DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the accompanying drawings showing one specific example of the present invention.
本発明のセルフクリーニング式ベントプラグ
は、その一例として第３図に示す如く、エアーベ
ントピン３が押出桿１０と突出桿１１からなつて
おり、その中間につば部１２が設けてある。４は
軸受であつて、金型のベント孔１３の背面に適当
な手段（図示ではボルト締め）で固着してあり、
図示の如く開放型構造とし造型砂の排出を容易と
する構成としてある。前記エアーベントピン３の
押出桿１０が該軸受４に摺動自在に装着してあ
り、又突出桿１１が金型のベント孔１３内に遊嵌
状に挿入してある。５はスプリングであつて、エ
アーベントピンのつば部１２と金型背面に係止し
てあり、該スプリング５はエアーベントピン３の
金型１方向への移動により圧縮状態となるように
装着してある。又、該突出桿１１の外径D1は金
型のベント孔１３の内径D2より0.4mm以下として
あり、従つて突出桿１１の周囲には図示の如き円
周状の間隙、即ち外周のクリアランスＧが0.2mm
以下になる如く構成してある。 As an example of the self-cleaning vent plug of the present invention, as shown in FIG. 3, the air vent pin 3 consists of an extrusion rod 10 and a protrusion rod 11, and a collar portion 12 is provided in the middle thereof. Reference numeral 4 denotes a bearing, which is fixed to the back side of the vent hole 13 of the mold by appropriate means (bolted in the illustration).
As shown in the figure, it has an open structure to facilitate the discharge of molding sand. The extrusion rod 10 of the air vent pin 3 is slidably mounted on the bearing 4, and the extrusion rod 11 is loosely inserted into the vent hole 13 of the mold. Reference numeral 5 denotes a spring, which is engaged with the collar 12 of the air vent pin and the back of the mold, and the spring 5 is installed so that it is compressed when the air vent pin 3 moves in the direction of the mold 1. There is. Further, the outer diameter D 1 of the protruding rod 11 is set to be 0.4 mm or less than the inner diameter D 2 of the vent hole 13 of the mold, and therefore there is a circumferential gap around the protruding rod 11 as shown in the figure, that is, the outer circumference. Clearance G is 0.2mm
It is structured as follows.
本発明のセルフクリーニング式エアーベントは
前記の如き構成からなつており、その作動態様を
第４図及び第５図によつて以下に詳述する。 The self-cleaning air vent of the present invention is constructed as described above, and its operating mode will be explained in detail below with reference to FIGS. 4 and 5.
第４図は本発明エアーベントを装着した一方の
金型の断面図であつて、造型材を吹込む前の状態
を示す。図示の如く、突出桿１１の端面は金型空
所１′の内表面と同一面になるように構成し、該
突出桿１１の外周面と金型１のベント孔１３の内
周面間に間隙Ｇを形成してあり、従つて、造型材
を吹込んだ空気はこの間隙Ｇから外部に排出され
る。造型完了後、シリンダー８を作動せしめてそ
のピストンロツドに取り付けた押出板７を上動さ
せる。この上昇運動に伴つて連結板６に植設した
押出ピン２が金型空所内に突出し、造型鋳型１４
を金型１より離型する。更に押出板７を上動させ
ることにより、押出桿１０の端面に連結板６が当
接し、エアーベントピン３全体をスプリング５に
抗して造型空所１′内に突出する。即ち突出桿１
１が造型空所１′に突出し（第５図図示）、ベント
孔１３内に堆積された造型材の一部が突出桿１１
によりその都度自動的に清掃され、ベント孔１３
の目づまりを防止することができる。 FIG. 4 is a sectional view of one of the molds equipped with the air vent of the present invention, and shows the state before molding material is blown into the mold. As shown in the figure, the end surface of the protruding rod 11 is configured to be flush with the inner surface of the mold cavity 1', and there is a space between the outer circumferential surface of the protruding rod 11 and the inner circumferential surface of the vent hole 13 of the mold 1. A gap G is formed, so that the air into which the molding material has been blown is discharged to the outside from this gap G. After the molding is completed, the cylinder 8 is activated to move the extrusion plate 7 attached to the piston rod upward. With this upward movement, the extrusion pin 2 implanted in the connecting plate 6 protrudes into the mold cavity, and the molding mold 14
is released from mold 1. By further moving the push-out plate 7 upward, the connecting plate 6 comes into contact with the end face of the push-out rod 10, and the entire air vent pin 3 projects into the molding cavity 1' against the spring 5. That is, protruding rod 1
1 protrudes into the molding cavity 1' (as shown in FIG.
The vent hole 13 is automatically cleaned each time.
clogging can be prevented.
造型鋳型１４の離型及びベント孔１３の自動的
清掃が完了した後は、常法に従いシリンダー８を
逆方向に作動させれば、エアーベントピン３はス
プリング５の反撥力により造型開始時（第４図）
の状態に復帰する。 After the mold release of the mold 14 and the automatic cleaning of the vent hole 13 are completed, if the cylinder 8 is operated in the opposite direction according to the usual method, the air vent pin 3 is activated at the start of molding (starting at the start of molding) by the repulsive force of the spring 5. Figure 4)
The state will be restored.
以上、エアーベントピンの摺動にスプリングを
用いた例について説明したが、他の手段を用いて
も同様の作動を行ない得ることも当業者に明白な
ところである。 Although an example in which a spring is used to slide the air vent pin has been described above, it is obvious to those skilled in the art that the same operation can be achieved using other means.
本発明は前述の如く、従来のベントプラグとは
全く別異の構成からなつており、造型―サイクル
毎にベント孔の自動的清掃（セルフクリーニン
グ）が行えるので、ベント孔の目づまりによる従
来の如き造型操作中のトラブルが皆無となり、従
つて、造型操作の作業性を大いに改善、向上し得
る顕著な作用、効果を達成しうるものである。 As mentioned above, the present invention has a completely different configuration from conventional vent plugs, and because the vent hole can be automatically cleaned (self-cleaning) after each molding cycle, it is possible to prevent the conventional vent hole from clogging. Such troubles during the molding operation are completely eliminated, and therefore, remarkable functions and effects that can greatly improve the workability of the molding operation can be achieved.
第１図は公知のベントプラグ平面図、第２図は
これら公知のベントプラグの金型への装着状態を
示す断面図、第３図は本発明セルフクリーニング
式エアーベントの一例を示す断面図、第４図は本
発明エアーベントを金型に取り付けた状態を示す
断面略図、第５図は清掃完了時の状態を示す断面
略図であり、図中、１は金型、３はエアーベント
ピン、４は軸受、５はスプリング、１０はエアー
ベントピンの押出桿、１１はエアーベントピンの
突出桿、１２はつば部、１３はベント孔、Ｇは間
隙を夫々示す。
FIG. 1 is a plan view of a known vent plug, FIG. 2 is a sectional view showing how these known vent plugs are attached to a mold, and FIG. 3 is a sectional view showing an example of the self-cleaning air vent of the present invention. FIG. 4 is a schematic cross-sectional view showing the air vent of the present invention attached to a mold, and FIG. 5 is a schematic cross-sectional view showing the state when cleaning is completed. In the figure, 1 is a mold, 3 is an air vent pin, 4 is a bearing, 5 is a spring, 10 is a protruding rod of an air vent pin, 11 is a protruding rod of an air vent pin, 12 is a collar, 13 is a vent hole, and G is a gap.
Claims (1)
着した軸承に摺動自在に装着し、エアーベントピ
ンの突出桿部を金型に設けたベント孔内に遊嵌状
に装着し、該押出桿部端面への連結板の当接によ
り前記突出桿部が造型空所へ突出する機構とし、
該突出桿部の外径が前記ベント孔の内径より0.4
mm以下であることを特徴とする鋳型造型機用セル
フクリーニング式エアーベント。 ２ エアーベントピンの突出桿部にスプリングを
装着した特許請求の範囲第１項記載の鋳型造型機
用セルフクリーニング式エアーベント。 ３ 前記軸承が開放型構造である特許請求の範囲
第１項記載の鋳型造型機用セルフクリーニング式
エアーベント。[Claims] 1. The extruded rod part of the air vent pin is slidably mounted on a bearing fixed to the back of the mold, and the protruded rod part of the air vent pin is loosely fitted into a vent hole provided in the mold. and a mechanism in which the protruding rod portion protrudes into the molding cavity by abutting the connecting plate against the end face of the extrusion rod portion,
The outer diameter of the protruding rod is 0.4 greater than the inner diameter of the vent hole.
A self-cleaning air vent for mold making machines characterized by the air vent being less than mm. 2. A self-cleaning air vent for a mold making machine according to claim 1, wherein a spring is attached to the protruding rod portion of the air vent pin. 3. A self-cleaning air vent for a mold making machine according to claim 1, wherein the bearing has an open structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8863582A JPS58205648A (en) | 1982-05-24 | 1982-05-24 | Self cleaning type air vent for molding machine of casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8863582A JPS58205648A (en) | 1982-05-24 | 1982-05-24 | Self cleaning type air vent for molding machine of casting mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58205648A JPS58205648A (en) | 1983-11-30 |
| JPS623704B2 true JPS623704B2 (en) | 1987-01-26 |
Family
ID=13948266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8863582A Granted JPS58205648A (en) | 1982-05-24 | 1982-05-24 | Self cleaning type air vent for molding machine of casting mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58205648A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5665281A (en) * | 1993-12-02 | 1997-09-09 | Motorola, Inc. | Method for molding using venting pin |
| US5715885A (en) * | 1995-12-29 | 1998-02-10 | Georg Fischer Disa, Inc. | Apparatus and method for cleaning core box vents |
| KR100471279B1 (en) * | 2002-11-20 | 2005-03-08 | 현대자동차주식회사 | A ejecting device in die casting metallic pattern |
| KR100820707B1 (en) | 2006-11-24 | 2008-04-11 | 현대자동차주식회사 | Double ejecting device in die casting metallic pattern |
| US8327916B2 (en) | 2010-01-14 | 2012-12-11 | Toyota Motor Engineering & Manufacturing North America (Tema) | Low pressure cylinder head outer die components for core gas removal |
| CN106623813A (en) * | 2016-12-28 | 2017-05-10 | 池州恒和精密机械有限公司 | Sand mold machining device for hollow casting |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5843849B2 (en) * | 1977-08-09 | 1983-09-29 | 三菱電機株式会社 | Fuse operation indicator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5843849U (en) * | 1981-09-11 | 1983-03-24 | トヨタ自動車株式会社 | Blow-in mold venting device |
-
1982
- 1982-05-24 JP JP8863582A patent/JPS58205648A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5843849B2 (en) * | 1977-08-09 | 1983-09-29 | 三菱電機株式会社 | Fuse operation indicator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58205648A (en) | 1983-11-30 |
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