JPH07108346A - Metallic mold for forming foam pattern - Google Patents
Metallic mold for forming foam patternInfo
- Publication number
- JPH07108346A JPH07108346A JP5253078A JP25307893A JPH07108346A JP H07108346 A JPH07108346 A JP H07108346A JP 5253078 A JP5253078 A JP 5253078A JP 25307893 A JP25307893 A JP 25307893A JP H07108346 A JPH07108346 A JP H07108346A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- opening area
- narrow cavity
- cavity
- forming
- 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.)
- Pending
Links
Landscapes
- Molding Of Porous Articles (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋳造用消失性模型とし
て用いられる発泡模型を成形するための金型の構造に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a mold for molding a foam model used as a disappearing model for casting.
【０００２】[0002]
【従来の技術】発泡性の熱可塑性樹脂粒子から形成され
た消失性模型を鋳物砂中に埋め込み、これに溶湯を注入
することによって消失性模型を燃焼・気化させて消失性
模型と同一形状の鋳物製品を得る方法は、一般に充填鋳
造法と称され広く利用されている。2. Description of the Related Art An extinguishing model made of expandable thermoplastic resin particles is embedded in foundry sand, and a molten metal is injected into the extinguishing model so that the extinguishing model is burned and vaporized to have the same shape as the extinguishing model. A method for obtaining a cast product is generally called a filling casting method and is widely used.
【０００３】この消失性模型を製作するには、発泡ポリ
スチレン、発泡ポリメチルメタクリレートなどの発泡性
熱可塑性樹脂粒子を予備発泡させ、分割された金型によ
り郭定されるキャビティにエアとともに充填する。そし
てキャビティ内に加熱スチームを導入することにより、
予備発泡粒子を膨張させるとともに互いに融着させて成
形体とするのが一般的である。In order to manufacture this vanishable model, expandable thermoplastic resin particles such as expanded polystyrene and expanded polymethylmethacrylate are pre-expanded and filled in a cavity defined by a divided mold together with air. And by introducing heating steam into the cavity,
In general, the pre-expanded particles are expanded and fused together to form a molded body.
【０００４】ところで発泡模型成形用金型には、キャビ
ティ面にベントや細孔が無数に設けられている（特開昭
６０−１３７５４５号公報参照）。このベントや細孔
は、予備発泡粒子をキャビティ内に充填する際のエア逃
がし通路と充填後の加熱スチーム導入通路として機能
し、発泡模型成形時に重要な役割を担っている。By the way, in the mold for forming a foamed model, innumerable vents and pores are provided on the cavity surface (see JP-A-60-137545). The vents and pores function as an air escape passage when the pre-expanded particles are filled in the cavity and a heating steam introduction passage after the filling, and play an important role in forming the foamed model.
【０００５】[0005]
【発明が解決しようとする課題】発泡模型成形用金型の
ベントは、例えば図４及び図５に示すように金型本体１
にベント穴３１を穿設し、そのベント穴３１内にベント
３０が打ち込まれて設けられている。このベントの種類
として直径２〜３ｍｍの小型ベントも存在するが、その
開口面積は非常に小さいため予備発泡粒子の充填不良や
融着不良が発生しやすい。The vent of the mold for forming the foamed model has a mold body 1 as shown in FIGS. 4 and 5, for example.
A vent hole 31 is bored in the vent hole 31, and the vent 30 is driven into the vent hole 31. There is a small vent having a diameter of 2 to 3 mm as the kind of the vent, but the opening area of the vent is very small, so that the pre-expanded particles may be insufficiently filled or defectively fused.
【０００６】ここで、発泡模型に肉厚３〜４ｍｍ程度の
リブなどが存在すると、金型にはその反転形状の狭小キ
ャビティ部が必要となる。しかし、そのような狭小キャ
ビティ部には、適当な大きさのベントを設けることが困
難である。そのため小型ベントとせざるを得ない。また
外部と連通する細孔を設けることもできるが、細孔の径
は予備発泡粒子の粒径より小さくする必要があり、一般
に直径０．７ｍｍ以下の細孔しか設けることができな
い。Here, if a rib having a thickness of about 3 to 4 mm is present in the foamed model, the mold requires a narrow cavity portion having an inverted shape. However, it is difficult to provide a vent having an appropriate size in such a narrow cavity portion. Therefore, it has no choice but to use a small vent. It is also possible to provide pores communicating with the outside, but the diameter of the pores must be smaller than the particle size of the pre-expanded particles, and generally only pores having a diameter of 0.7 mm or less can be provided.
【０００７】ところが小型ベントや細孔では、その開口
面積が非常に小さいためエアや加熱スチームを充分に通
過させることが困難である。そのため狭小キャビティ部
における予備発泡粒子の充填不良や融着不良を防止する
ためには、小型ベントや細孔を多数設け、開口面積の合
計量を増大させる必要がある。しかしながら、この場合
はベント穴や細孔を形成する工数が膨大となるという不
具合がある。However, since the opening area of the small vents and the pores is very small, it is difficult to allow air and heating steam to sufficiently pass therethrough. Therefore, in order to prevent defective filling and defective fusion of pre-expanded particles in the narrow cavity portion, it is necessary to provide a large number of small vents and pores to increase the total amount of the opening area. However, in this case, there is a problem that the number of steps for forming the vent holes and the pores becomes enormous.
【０００８】本発明はこのような事情に鑑みてなされた
ものであり、エアや加熱スチームの通路を大きな開口面
積で、しかも小さな工数で形成できる発泡模型成形用金
型とすることを目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a foamed model molding die capable of forming passages for air and heating steam with a large opening area and with a small number of steps. .
【０００９】[0009]
【課題を解決するための手段】上記課題を解決する本発
明の発泡模型成形用金型は、キャビティの少なくとも一
部に狭小キャビティ部をもつ分割された発泡模型成形用
金型において、少なくとも狭小キャビティ部の型面に狭
小キャビティ部内と外部とを連通するスリット状の切り
孔を設けたことを特徴とする。A foamed model molding die of the present invention which solves the above-mentioned problems is a divided foamed model molding die having a narrow cavity portion in at least a part of a cavity, and at least a narrow cavity. It is characterized in that a slit-shaped cut hole that connects the inside and the outside of the narrow cavity portion is provided on the mold surface of the portion.
【００１０】[0010]
【作用】例えば直径０．７ｍｍの細孔の開口面積は０．
３８ｍｍ2 であり、合計開口面積を１０ｍｍ2 とするに
はその細孔を約２６個設ける必要がある。一方、本発明
の発泡模型成形用金型では、例えばスリット状の切り孔
の開口幅を上記細孔の直径より小さい０．５ｍｍとして
も、開口面積を１０ｍｍ2 とするには切り孔の長さは２
０ｍｍでよい。[Function] For example, the opening area of pores having a diameter of 0.7 mm is 0.
It is 38 mm 2 , and it is necessary to provide about 26 pores in order to make the total opening area 10 mm 2 . On the other hand, in the foamed model molding die of the present invention, for example, even if the opening width of the slit-shaped cut hole is 0.5 mm smaller than the diameter of the pore, the cut hole length is set to 10 mm 2 for the opening area. Is 2
0 mm is sufficient.
【００１１】すなわち本発明の発泡模型成形用金型で
は、狭小キャビティ部に大きな開口面積で切り孔をもつ
ので、予備発泡粒子の充填時に予備発泡粒子の逃げを防
止しつつ狭小キャビティ部からエアを円滑に排出するこ
とができる。また加熱スチーム導入時には加熱スチーム
が円滑に狭小キャビティ部内に導入される。そして例え
ば直径０．７ｍｍの細孔を２６個設けるのに比べて、開
口幅０．５ｍｍのスリット状の切り孔を２０ｍｍ形成す
る方が極めて容易であり、小さな工数で金型を製造する
ことが可能となる。That is, in the mold for forming a foamed model of the present invention, since the narrow cavity has a cut hole with a large opening area, when the pre-foamed particles are filled, the pre-foamed particles are prevented from escaping and air is blown from the narrow cavity. It can be discharged smoothly. Further, when introducing the heating steam, the heating steam is smoothly introduced into the narrow cavity portion. Then, compared with, for example, providing 26 pores having a diameter of 0.7 mm, it is extremely easy to form 20 mm slit-shaped cut holes having an opening width of 0.5 mm, and a die can be manufactured with a small number of steps. It will be possible.
【００１２】[0012]
【実施例】以下、実施例により具体的に説明する。図１
に本実施例の発泡模型成形用金型の断面図を示す。この
金型は、内部に空間１０を有する固定型１と、内部に空
間２０を有する可動型２とから構成されている。この固
定型１と可動型２により、発泡模型と同一形状のキャビ
ティ３が郭定される。EXAMPLES The present invention will be specifically described below with reference to examples. Figure 1
A cross-sectional view of the foamed model molding die of this example is shown in FIG. This mold comprises a fixed mold 1 having a space 10 inside and a movable mold 2 having a space 20 inside. The fixed mold 1 and the movable mold 2 define a cavity 3 having the same shape as the foam model.
【００１３】固定型１及び可動型２のキャビティ３に面
する部分には、図４及び図５に示すようにベント穴３１
に打ち込まれてなるベント３０が複数個設けられ、空間
１０及び空間２０はベント３０を介してキャビティ３と
連通している。空間１０及び空間２０には、それぞれ大
気と連通する通路１１及び通路２１が設けられている。
この通路１１及び通路２１にはスチーム供給管が大気と
切替え可能に連結され、空間１０及び空間２０には加熱
スチームも供給可能となっている。また固定型１には充
填ガン４が保持され、充填ガン４は金型外部に貯えられ
た発泡ポリスチレンからなる予備発泡粒子４０をエアと
ともにキャビティ３内に供給可能となっている。As shown in FIGS. 4 and 5, a vent hole 31 is provided in a portion of the fixed mold 1 and the movable mold 2 which faces the cavity 3.
There are provided a plurality of vents 30 driven into the space 10. The spaces 10 and 20 communicate with the cavity 3 via the vents 30. The space 10 and the space 20 are respectively provided with a passage 11 and a passage 21 which communicate with the atmosphere.
A steam supply pipe is switchably connected to the atmosphere in the passages 11 and 21, and heating steam can be supplied to the spaces 10 and 20. Further, the fixed mold 1 holds a filling gun 4, and the filling gun 4 can supply the pre-expanded particles 40 made of expanded polystyrene stored outside the mold together with air into the cavity 3.
【００１４】図２及び図３に示すように固定型１の型面
１２の一部には、発泡模型の格子状のリブ部（肉厚３ｍ
ｍ）を形成する狭小キャビティ部１３が縦横に形成され
ている。縦方向に延びる狭小キャビティ部１３の底に
は、狭小キャビティ部１３に沿って延び開口幅が０．５
ｍｍのスリット状切り孔１４が形成され、狭小キャビテ
ィ部１３と空間１０とを連通している。As shown in FIGS. 2 and 3, a part of the mold surface 12 of the fixed mold 1 has a grid-like rib portion (thickness of 3 m) of the foam model.
m) is formed vertically and horizontally. At the bottom of the narrow cavity portion 13 extending in the vertical direction, the opening width extending along the narrow cavity portion 13 is 0.5.
A slit-shaped cut hole 14 of mm is formed to connect the narrow cavity portion 13 and the space 10.
【００１５】次に、上記金型を用いて発泡模型を成形す
る方法を説明する。先ず可動型２を固定型１に当接さ
せ、型締めを行う。この状態で空間１０及び空間２０は
大気に開放されている。そして充填ガン４により、エア
とともに予備発泡粒子４０をキャビティ３内に充填す
る。予備発泡粒子４０とともに供給されたエア及びキャ
ビティ３内のエアは、ベント３０，空間１０及び空間２
０を介して通路１１及び通路２１から大気中へ逃げ、狭
小キャビティ部１３からは切り孔１４，空間１０及び通
路１１を介して大気中へ逃げる。したがって狭い狭小キ
ャビティ部１３内にも予備発泡粒子４０は確実に充填さ
れ、充填不良が防止されている。Next, a method of molding a foamed model using the above mold will be described. First, the movable mold 2 is brought into contact with the fixed mold 1, and the mold is clamped. In this state, the space 10 and the space 20 are open to the atmosphere. Then, the pre-expanded particles 40 are filled in the cavity 3 together with air by the filling gun 4. The air supplied together with the pre-expanded particles 40 and the air in the cavity 3 are the vent 30, the space 10 and the space 2.
It escapes to the atmosphere from the passage 11 and the passage 21 through 0, and escapes to the atmosphere from the narrow cavity portion 13 through the cut hole 14, the space 10 and the passage 11. Therefore, the pre-expanded particles 40 are surely filled even in the narrow narrow cavity portion 13 and the filling failure is prevented.
【００１６】予備発泡粒子４０がキャビティ３及び狭小
キャビティ部１３に完全に充填されると、次に空間１０
及び空間２０内には通路１１及び２１を介して加熱スチ
ームが供給される。加熱スチームは、ベント３０及び切
り孔１４を通ってキャビティ３及び狭小キャビティ部１
３に充満され、予備発泡粒子４０は膨張するとともに互
いに融着して一体化する。When the pre-expanded particles 40 are completely filled in the cavity 3 and the narrow cavity portion 13, the space 10 is then filled.
The heating steam is supplied into the space 20 through the passages 11 and 21. The heating steam passes through the vent 30 and the cut hole 14, and the cavity 3 and the narrow cavity portion 1
3, the pre-expanded particles 40 expand and are fused and integrated with each other.
【００１７】そして加熱スチームの供給を停止し成形体
が冷却固化後、可動型２を固定型１から型開きし、キャ
ビティ３から発泡模型を取り出して成形の１サイクルが
完了する。すなわち本実施例の金型では、狭小キャビテ
ィ部１３にはスリット状の切り孔１４が形成されている
ため、エア及び加熱スチームの出入が円滑に行われる。
また切り孔１４の形成は極めて容易に行うことができ、
小型ベントや細孔を多数穿設する従来の手段に比べて金
型の製造コストは安価となる。Then, after the supply of heating steam is stopped and the molded body is cooled and solidified, the movable mold 2 is opened from the fixed mold 1, the foamed model is taken out from the cavity 3, and one molding cycle is completed. That is, in the mold of this embodiment, since the slit-shaped cut hole 14 is formed in the narrow cavity portion 13, the air and the heating steam can be smoothly taken in and out.
Further, the cut hole 14 can be formed extremely easily,
The manufacturing cost of the mold is lower than that of the conventional means for forming a small number of small vents or a large number of pores.
【００１８】[0018]
【発明の効果】すなわち本発明の発泡模型成形用金型に
よれば、狭小キャビティ部からのエアの排出が円滑に行
われるため、予備発泡粒子の充填不良が解消される。ま
た狭小キャビティ部への加熱スチームの供給が円滑に行
われるため、予備発泡粒子の融着不良が確実に阻止され
成形体の良品率が向上する。According to the mold for forming a foamed model of the present invention, air is smoothly discharged from the narrow cavity portion, so that the defective filling of the pre-foamed particles is eliminated. Further, since the heating steam is smoothly supplied to the narrow cavity portion, the defective fusion of the pre-expanded particles is reliably prevented and the non-defective rate of the molded product is improved.
【００１９】そしてスリット状の切り孔を所定長さ以上
形成するだけでよいので、細孔やベント穴を形成するの
に比べて大幅に工数を低減することができる。Since it is only necessary to form the slit-shaped cut holes of a predetermined length or more, it is possible to significantly reduce the number of steps as compared with the case of forming the pores and the vent holes.
【図１】本発明の一実施例の発泡模型成形用金型の断面
図である。FIG. 1 is a cross-sectional view of a foamed model molding die according to an embodiment of the present invention.
【図２】本発明の一実施例の発泡模型成形用金型の固定
型の型面側の一部の平面図である。FIG. 2 is a plan view of a part of the fixed mold of the foamed model molding mold of the embodiment of the present invention on the mold surface side.
【図３】図２のＡ−Ａ断面図である。3 is a cross-sectional view taken along the line AA of FIG.
【図４】発泡模型成形用金型の固定型の型面側の一部の
平面図である。FIG. 4 is a plan view of a part of the fixed mold of the foam model molding mold on the mold surface side.
【図５】図４のＢ−Ｂ断面図である。5 is a sectional view taken along line BB of FIG.
１：固定型 ２：可動型
３：キャビティ １０：空間 １３：狭小キャビティ部 １
４：切り孔 ２０：空間 ３０：ベント ３
１：ベント穴1: Fixed type 2: Movable type
3: Cavity 10: Space 13: Narrow cavity 1
4: Cut hole 20: Space 30: Vent 3
1: Vent hole
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２９Ｋ 105:04 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI technical display area // B29K 105: 04
Claims (1)
ビティ部をもつ分割された発泡模型成形用金型におい
て、少なくとも狭小キャビティ部の型面に該狭小キャビ
ティ部内と外部とを連通するスリット状の切り孔を設け
たことを特徴とする発泡模型成形用金型。1. A divided foam model molding die having a narrow cavity portion in at least a part of the cavity, and at least a slit-shaped cut hole for communicating the inside and the outside of the narrow cavity portion with a mold surface of the narrow cavity portion. A mold for forming a foamed model, characterized by being provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5253078A JPH07108346A (en) | 1993-10-08 | 1993-10-08 | Metallic mold for forming foam pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5253078A JPH07108346A (en) | 1993-10-08 | 1993-10-08 | Metallic mold for forming foam pattern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07108346A true JPH07108346A (en) | 1995-04-25 |
Family
ID=17246190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5253078A Pending JPH07108346A (en) | 1993-10-08 | 1993-10-08 | Metallic mold for forming foam pattern |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07108346A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009166344A (en) * | 2008-01-16 | 2009-07-30 | Hane:Kk | Foam molding mold assembly and molding method of foam molded object using it |
| US7878785B2 (en) | 2004-05-12 | 2011-02-01 | Proprietect L.P. | Vented mold and method for producing molded article |
| JP4632563B2 (en) * | 2001-03-08 | 2011-02-16 | アキレス株式会社 | Mold for manufacturing foamed resin block for vanishing model |
| KR101134489B1 (en) * | 2010-01-22 | 2012-04-13 | (주)코모텍 | Manufacturing apparatus of foam-molding product and manufacturing method thereof |
| EP2857166A1 (en) * | 2013-10-07 | 2015-04-08 | Michel Thorsten | Mould |
| WO2015129065A1 (en) * | 2014-02-28 | 2015-09-03 | 有限会社三宝金型製作所 | Die for foam molded body |
| JP2017030179A (en) * | 2015-07-30 | 2017-02-09 | 有限会社三宝金型製作所 | Die for expanded resin molded body |
-
1993
- 1993-10-08 JP JP5253078A patent/JPH07108346A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4632563B2 (en) * | 2001-03-08 | 2011-02-16 | アキレス株式会社 | Mold for manufacturing foamed resin block for vanishing model |
| US7878785B2 (en) | 2004-05-12 | 2011-02-01 | Proprietect L.P. | Vented mold and method for producing molded article |
| JP2009166344A (en) * | 2008-01-16 | 2009-07-30 | Hane:Kk | Foam molding mold assembly and molding method of foam molded object using it |
| KR101134489B1 (en) * | 2010-01-22 | 2012-04-13 | (주)코모텍 | Manufacturing apparatus of foam-molding product and manufacturing method thereof |
| EP2857166A1 (en) * | 2013-10-07 | 2015-04-08 | Michel Thorsten | Mould |
| CN104511998A (en) * | 2013-10-07 | 2015-04-15 | 托尔斯滕·米歇尔 | Mould |
| WO2015129065A1 (en) * | 2014-02-28 | 2015-09-03 | 有限会社三宝金型製作所 | Die for foam molded body |
| WO2015129054A1 (en) * | 2014-02-28 | 2015-09-03 | 有限会社三宝金型製作所 | Die for foam molded body |
| JP6052463B2 (en) * | 2014-02-28 | 2016-12-27 | 有限会社三宝金型製作所 | Mold for foam molding |
| JP2017024425A (en) * | 2014-02-28 | 2017-02-02 | 有限会社三宝金型製作所 | Die for foam molding |
| JP2017030179A (en) * | 2015-07-30 | 2017-02-09 | 有限会社三宝金型製作所 | Die for expanded resin molded body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5501890A (en) | Invisible tear seam for an air bag deployment opening cover | |
| JPH0214137B2 (en) | ||
| JPH07108346A (en) | Metallic mold for forming foam pattern | |
| WO2006090738A1 (en) | Process for producing forming metal mold and forming metal mold | |
| EP0294970B1 (en) | Metal casting patterns | |
| JPH0442106B2 (en) | ||
| JP4607621B2 (en) | Manufacturing method of mold for molding | |
| CA1222856A (en) | Expanded polystyrene mold for producing parts with smooth surfaces | |
| JPS6283112A (en) | Manufacture of hollow resin part | |
| JPH0538550A (en) | Lost foam pattern | |
| KR100195476B1 (en) | Model molding device of parts of a car using an evaporative pattern casting a sintercore metallic material | |
| JP3045015U (en) | In-mold foaming mold with uneven pattern | |
| JPH02217131A (en) | Lost foam pattern casting method | |
| JP2552376B2 (en) | Manufacturing method of hollow disappearance model | |
| JP2599986Y2 (en) | Mold structure for foam molding | |
| JPH0514820Y2 (en) | ||
| JP3173686B2 (en) | Vanishing model casting method | |
| JPS60137546A (en) | Manufacture of hollow expendable pattern for casting | |
| JPH1015951A (en) | Production of mold and production of packing material using mold | |
| JPS63317323A (en) | Molding of foam | |
| JPH06166095A (en) | Molding method for foam with skin | |
| JP2770120B2 (en) | Manufacturing method of foamed molded body with skin | |
| JPH0857884A (en) | Mold with insert moving mechanism and bead foam molding method | |
| JPH0550179A (en) | Manufacture of lost foam pattern | |
| JPH10113942A (en) | Manufacture of foam |