JPS5829175B2 - Method of forming plastic coating for vacuum molding - Google Patents
Method of forming plastic coating for vacuum moldingInfo
- Publication number
- JPS5829175B2 JPS5829175B2 JP51003415A JP341576A JPS5829175B2 JP S5829175 B2 JPS5829175 B2 JP S5829175B2 JP 51003415 A JP51003415 A JP 51003415A JP 341576 A JP341576 A JP 341576A JP S5829175 B2 JPS5829175 B2 JP S5829175B2
- Authority
- JP
- Japan
- Prior art keywords
- model
- recess
- plastic
- guide rod
- plastic sheet
- 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
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/04—Combined thermoforming and prestretching, e.g. biaxial stretching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/10—Forming by pressure difference, e.g. vacuum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Casting Devices For Molds (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【発明の詳細な説明】
本発明は減圧鋳型の造型にむいて、鋳型に鋳造すべき鋳
物と同−形秋空胴部を形成する模型表面に予じめ被覆す
るプラスチック被膜の成形方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a plastic coating, which is used for making a vacuum mold, to preliminarily coat the surface of a model forming a cavity having the same shape as the casting to be cast into the mold.
従来、減圧鋳型を造型するには、１ず鋳型に鋳造すべき
鋳物と同一形状の空胴部を形成する通気性模型表面にプ
ラスチックシートを被覆した後、模型側を減圧してこの
表面にプラスチックシートを吸着し、プラスチック被膜
を成形する。Conventionally, in order to make a vacuum mold, the first step is to cover the surface of a breathable model that forms a cavity with the same shape as the casting to be cast in the mold with a plastic sheet, and then reduce the pressure on the model side and cover this surface with plastic. Adsorbs the sheet and forms a plastic film.
ついでこのプラスチック被膜に覆われた模型を鋳枠内の
所定位置に置き、その周りに粘結剤を含−まない鋳物砂
を充填した後鋳伜内金減圧するとともに前記模型側の減
圧を解いて該模型表向に蓄養していたプラスチックシー
トを鋳物砂側に吸着させ、ついで模型を取外すことによ
り模型と同一形状の空胴部を形成した鋳型の表面にプラ
スチック被膜を被覆するようになっている。Next, the model covered with this plastic film is placed in a predetermined position in the casting flask, and after filling molding sand that does not contain a binder around it, the pressure in the mold is reduced and the pressure on the model side is released. The plastic sheet that had been stored on the surface of the model was adsorbed to the molding sand side, and then the model was removed to coat the surface of the mold, which had a cavity in the same shape as the model, with a plastic film. There is.
しかるに、上記模型表面にプラスチックシートを吸着す
るに際して模型に大きな凹凸が存在する場合、該模型の
表面全面を１枚のプラスチックシートで被覆して、これ
を模型表面に吸着せしめることは難しく、特に深い凹部
がある場合には凹部の開口部分にあるフィルムのみで凹
部の内置全面を被着しなければならない為該シートが破
損する不都合があった。However, when adhering a plastic sheet to the model surface, if the model has large irregularities, it is difficult to cover the entire surface of the model with a single plastic sheet and make it adsorb onto the model surface. If there is a recess, it is necessary to cover the entire surface of the recess with only the film at the opening of the recess, resulting in damage to the sheet.
このようなことから従来は模型の凹部に対しては別途成
形したプラスチックシートを装着するか、または中子を
用いることにより所定の形状のプラスチック被膜を成形
していた。For this reason, conventionally, a separately molded plastic sheet was attached to the concave portion of the model, or a plastic coating of a predetermined shape was molded using a core.
しかし上述した方法ではプラスチック被膜相互の継ぎ目
の処理が必要で作業上の手間がかかるとともに、鋳造さ
れた鋳物にプラスチック被膜の継ぎ目跡が残り、精缶な
表面仕上げが要求される場合に表面仕上に時間がかかる
欠点があった。However, the above-mentioned method requires processing of the joints between the plastic coatings, which is labor-intensive, and also leaves traces of the plastic coating seams on the cast product, making it difficult to improve the surface finish when a fine surface finish is required. It had the disadvantage of being time consuming.
本発明は上記事情に鑑みてなされたもので、その目的と
するところは、深い凹部を有する模型表面を１枚のプラ
スチックシートで破損等が生じることがなく被覆でき、
さらに被膜相互の継ぎ目処理を必要としなｊρ減圧鋳型
用プラスチックフィルムの成形方法を提供するものであ
る。The present invention has been made in view of the above circumstances, and its purpose is to cover the surface of a model having deep recesses with a single plastic sheet without causing damage.
Furthermore, the present invention provides a method of molding a plastic film for use in a jρ vacuum molding process, which does not require seam treatment between coatings.
すなわち本発明は凹部を有する鋳物と同一形状の空胴部
を鋳型に形成する通気性模型の該鋳物凹部に対応した凹
部に突没自在な案内ロッドを設け、該案内ロッドを突出
した状態の模型表面にプラスチックシートを被覆した後
、該グラスチックシートを前記模型に吸着せしめつつ前
記案内ロッドを模型内に没入して、内面に前記グラスチ
ックシートを被覆した凹部を形成することを特徴とする
減圧鋳型用プラスチック被膜の成形方法である。That is, the present invention provides a breathable model in which a cavity having the same shape as a casting having a recess is formed in the mold, and a guide rod that can be freely projected and retracted is provided in a recess corresponding to the recess of the casting, and the model has the guide rod protruding. After the surface is coated with a plastic sheet, the guide rod is inserted into the model while the plastic sheet is adsorbed to the model to form a recessed part covered with the plastic sheet on the inner surface. This is a method of molding a plastic coating for molds.
以下本発明方法を図示する一実施例を参照して説明する
。The method of the present invention will be described below with reference to an illustrative embodiment.
１ず第１図に示すように上面を開１コした減圧吸引箱Ｉ
Ｊ−，［通気性を有する定盤２を載せ、さらｊ（この定
盤２上に通気性を有する模型３を固定する。1. Decompression suction box I with one open top as shown in Figure 1.
J-, [Place the air-permeable surface plate 2, and then fix the air-permeable model 3 on this surface plate 2.
この模型３は突没自在な案内ロッド４を設けてち一す、
この案内ロッド４を没入１−て凹部３ａを形成した状態
で鋳造すべき鋳物（図示せず）と同一形状となるように
なっている。This model 3 is equipped with a guide rod 4 that can be freely extended and retracted.
When the guide rod 4 is recessed to form the recess 3a, it has the same shape as the casting (not shown) to be cast.
上記案内ロッド４を矢印Ａ方向１（突出した状態で上記
模型３の表面にプラスチックシート５′を被覆した後、
前記吸引箱１内の空気を吸引してプラスチックシート５
′を前記模型３０表面に吸着せしめる。After covering the surface of the model 3 with a plastic sheet 5' with the guide rod 4 in the direction of arrow A 1 (in the protruding state),
The air inside the suction box 1 is sucked and the plastic sheet 5 is
' is adsorbed onto the surface of the model 30.
なち−この場合案内ロッド４の突出高さは特に限定され
るものではないが案内ロッド４を没入して得られる凹部
３ａの深さと同程度が好適である。That is, in this case, the protrusion height of the guide rod 4 is not particularly limited, but it is preferably about the same depth as the depth of the recess 3a obtained by recessing the guide rod 4.
ついで第２図に示すように案内ロッド４を矢印Ｂ方向に
没入するとプラスチックシート５′は該案内ロッド４に
吸着しつつ矢印Ｂ方向に案内され、案内ロッド４が所定
位置１で模型３内に没入して模型３に所定の凹部３ａが
形成されると前記プラスチックシート５′はとの凹部３
ａの内面全面に被着して所定形状のプラスチック被膜５
が成形されることとなる。Then, as shown in FIG. 2, when the guide rod 4 is retracted in the direction of arrow B, the plastic sheet 5' is attracted to the guide rod 4 and guided in the direction of arrow B, and the guide rod 4 is placed in the model 3 at the predetermined position 1. When the plastic sheet 5' is immersed and a predetermined recess 3a is formed in the model 3, the recess 3a is formed in the plastic sheet 5'.
A plastic coating 5 of a predetermined shape is adhered to the entire inner surface of a.
will be formed.
なち・このようにして得られた模型３のプラスチック被
膜５を鋳型（図示せず）に被覆するには従来と同様に、
模型３を鋳枠内の所定位置に置き、その周りに粘結剤を
含１ない鋳物砂を充填した後鋳枠内を減圧するとともに
前記模型からの減圧を解いて該模型表面に密着していた
プラスチック被膜５を鋳物砂側に吸着させ、ついで模型
３を取外すことにより鋳造すべき鋳物と同一の空胴部を
形成した鋳型の表面に該プラスチック被膜５を被覆する
こと６てよりなされる。In other words, in order to coat a mold (not shown) with the plastic coating 5 of the model 3 obtained in this way, as in the conventional case,
After placing the model 3 in a predetermined position in the flask and filling its surroundings with molding sand that does not contain a binder, the pressure inside the flask is reduced, and the vacuum from the model is released to ensure that it is in close contact with the surface of the model. The plastic coating 5 is adsorbed onto the molding sand side, and then the model 3 is removed to coat the surface of the mold, which has the same cavity as the casting to be cast, with the plastic coating 5.
以上説明したように、本発明によれば模型の案内ロッド
を突出した状態で模型表面にプラスチックシートを吸着
しつつ該案内ロッドを没入して、没入して形成された凹
部内に該プラスチックシートを被着するようにしたので
、凹部が深い場合にむいても凹部内面を被着するに充分
なプラスチックシートの面積を突出した案内ロッドによ
り確保することができプラスチック被膜を成形する際に
シートが破損するようなことがなくなる。As explained above, according to the present invention, the plastic sheet is sucked onto the surface of the model with the guide rod of the model protruding, and the guide rod is retracted, and the plastic sheet is inserted into the recess formed by the recess. This allows the protruding guide rod to ensure that the area of the plastic sheet is sufficient to cover the inner surface of the recess even if the recess is deep, and the sheet will not be damaged when forming the plastic film. There will be nothing to do.
さらに模型表面を前記凹部を含めて１枚のプラスチック
シートで被着できるので継ぎ目処理を必要とせず、また
鋳造された鋳物に継ぎ目跡が残らず表面仕上げが容易と
なるなど顕著な効果を奏する。Furthermore, since the surface of the model, including the recesses, can be covered with one plastic sheet, there is no need for seam treatment, and no seam marks are left on the cast product, making surface finishing easier.
図面は本発明方法の一実施例を示し、第１図は案内ロッ
ドを突出した状態の模型の断面図、第２図は案内ロッド
を没入した状態の模型の断面図である。
１・・・減圧吸引箱、２・・・定盤、３・・・模型、４
・・・案内ロッド、５・・・プラスチック被膜、３ａ・
・・凹部、５・・・プラスチックシート。The drawings show an embodiment of the method of the present invention; FIG. 1 is a sectional view of the model with the guide rod extended, and FIG. 2 is a sectional view of the model with the guide rod retracted. 1... Decompression suction box, 2... Surface plate, 3... Model, 4
...Guide rod, 5...Plastic coating, 3a.
... recess, 5... plastic sheet.
Claims (1)
する通気性模型の該鋳物凹部に対応した凹部に突没自在
な案内ロッドを設け、該模型表面に案内ロッドを突出し
た状態でプラスチックシートを被覆した後、該プラスチ
ックシートを前記模型に吸着せしめつ一つ前記案内ロッ
ドを模型内（（没入して、内面に前記プラスチックシー
トを被覆した凹部を形成することを特徴とする減圧鋳型
用プラスチック被覆の成形方法。1. A breathable model in which a cavity having the same shape as the casting having a recess is formed in the mold, and a guide rod that can be freely protruded and retracted is provided in a recess corresponding to the recess of the casting, and the plastic is placed with the guide rod protruding from the surface of the model. After covering the sheet, the plastic sheet is adsorbed to the model, and one of the guide rods is inserted into the model to form a recess with the inner surface covered with the plastic sheet. Method of forming plastic coating.
Priority Applications (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51003415A JPS5829175B2 (en) | 1976-01-14 | 1976-01-14 | Method of forming plastic coating for vacuum molding |
| GB48564/76A GB1527006A (en) | 1976-01-14 | 1976-11-22 | Vacuum forming or reduced-pressure moulding |
| DE2653648A DE2653648C3 (en) | 1976-01-14 | 1976-11-25 | Mold model for a vacuum molding device and method for vacuum molding a casting mold |
| SE7613287A SE7613287L (en) | 1976-01-14 | 1976-11-26 | VACUUM CONSTRUCTION PROCEDURE AND DEVICE |
| NLAANVRAGE7613293,A NL178756C (en) | 1976-01-14 | 1976-11-29 | METHOD AND MODEL FOR MANUFACTURING CASTINGS BY VACUUM. |
| BE2055510A BE849089A (en) | 1976-01-14 | 1976-12-06 | IMPROVEMENTS MADE AND / OR RELATING TO VACUUM FORMING OR MOLDING UNDER REDUCED PRESSURE |
| FR7637253A FR2338122A1 (en) | 1976-01-14 | 1976-12-10 | DEEP CAVITY METHOD AND MODEL FOR SHAPING A PLASTIC FILM ON THE MODEL |
| FI763745A FI60150C (en) | 1976-01-14 | 1976-12-30 | FOERFARANDE FOER VAKUUM- ELLER UNDERTRYCKSFORMNING AV EN GJUTFORM OCH FORMMODELL FOER UTFOERANDE AV FOERFARANDET |
| SU772434402A SU694060A3 (en) | 1976-01-14 | 1977-01-03 | Vacuum-moulding device |
| CH3477A CH610788A5 (en) | 1976-01-14 | 1977-01-04 | Casting-mould pattern for producing moulds by means of subatmospheric pressure |
| AT15477A AT349663B (en) | 1976-01-14 | 1977-01-13 | VACUUM MOLD PROCESS FOR MAKING CASTING MOLDS AND MODEL FOR CARRYING OUT THE PROCESS |
| DK14377A DK14377A (en) | 1976-01-14 | 1977-01-14 | METHOD FOR VACUUM-SHAPING A PLATE-SHAPED SUBSTANCE, PREFERREDLY A CLOTHING OF A FABRIC SHAPE, AND A MOLDING TOOL FOR PERFORMING THE PROCEDURE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51003415A JPS5829175B2 (en) | 1976-01-14 | 1976-01-14 | Method of forming plastic coating for vacuum molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5286450A JPS5286450A (en) | 1977-07-18 |
| JPS5829175B2 true JPS5829175B2 (en) | 1983-06-21 |
Family
ID=11556742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51003415A Expired JPS5829175B2 (en) | 1976-01-14 | 1976-01-14 | Method of forming plastic coating for vacuum molding |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS5829175B2 (en) |
| AT (1) | AT349663B (en) |
| BE (1) | BE849089A (en) |
| CH (1) | CH610788A5 (en) |
| DE (1) | DE2653648C3 (en) |
| DK (1) | DK14377A (en) |
| FI (1) | FI60150C (en) |
| FR (1) | FR2338122A1 (en) |
| GB (1) | GB1527006A (en) |
| NL (1) | NL178756C (en) |
| SE (1) | SE7613287L (en) |
| SU (1) | SU694060A3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0110446Y2 (en) * | 1984-01-31 | 1989-03-24 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19634747C2 (en) * | 1996-08-28 | 1998-12-24 | Fritsche Moellmann Gmbh Co Kg | Thermoforming tool |
-
1976
- 1976-01-14 JP JP51003415A patent/JPS5829175B2/en not_active Expired
- 1976-11-22 GB GB48564/76A patent/GB1527006A/en not_active Expired
- 1976-11-25 DE DE2653648A patent/DE2653648C3/en not_active Expired
- 1976-11-26 SE SE7613287A patent/SE7613287L/en unknown
- 1976-11-29 NL NLAANVRAGE7613293,A patent/NL178756C/en not_active IP Right Cessation
- 1976-12-06 BE BE2055510A patent/BE849089A/en not_active IP Right Cessation
- 1976-12-10 FR FR7637253A patent/FR2338122A1/en active Granted
- 1976-12-30 FI FI763745A patent/FI60150C/en not_active IP Right Cessation
-
1977
- 1977-01-03 SU SU772434402A patent/SU694060A3/en active
- 1977-01-04 CH CH3477A patent/CH610788A5/en not_active IP Right Cessation
- 1977-01-13 AT AT15477A patent/AT349663B/en not_active IP Right Cessation
- 1977-01-14 DK DK14377A patent/DK14377A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0110446Y2 (en) * | 1984-01-31 | 1989-03-24 |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2338122B1 (en) | 1978-11-03 |
| FI60150C (en) | 1981-12-10 |
| NL7613293A (en) | 1977-07-18 |
| FI60150B (en) | 1981-08-31 |
| NL178756C (en) | 1986-05-16 |
| FR2338122A1 (en) | 1977-08-12 |
| DE2653648B2 (en) | 1978-02-02 |
| GB1527006A (en) | 1978-10-04 |
| JPS5286450A (en) | 1977-07-18 |
| DE2653648C3 (en) | 1980-09-04 |
| SE7613287L (en) | 1977-07-15 |
| FI763745A (en) | 1977-07-15 |
| ATA15477A (en) | 1978-09-15 |
| BE849089A (en) | 1977-04-01 |
| DE2653648A1 (en) | 1977-07-21 |
| SU694060A3 (en) | 1979-10-25 |
| CH610788A5 (en) | 1979-05-15 |
| DK14377A (en) | 1977-07-15 |
| AT349663B (en) | 1979-04-25 |
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