JPH0117448B2 - - Google Patents
Info
- Publication number
- JPH0117448B2 JPH0117448B2 JP57084506A JP8450682A JPH0117448B2 JP H0117448 B2 JPH0117448 B2 JP H0117448B2 JP 57084506 A JP57084506 A JP 57084506A JP 8450682 A JP8450682 A JP 8450682A JP H0117448 B2 JPH0117448 B2 JP H0117448B2
- Authority
- JP
- Japan
- Prior art keywords
- container
- powder metallurgy
- mold
- polyvinyl chloride
- molded body
- 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
- 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/14—Dipping a core
-
- 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/46—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0058—Liquid or visquous
- B29K2105/0061—Gel or sol
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
粉末冶金の成型法の一つである静水圧成型法に
用いる容器の製造法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a container used in hydrostatic molding, which is one of powder metallurgy molding methods.
大型品や異型品の成型には従来静水圧成型が一
般に用いられているが、これは予め製品形状に近
い形状の型をゴム製容器で製作しておき、これに
粉末を充填し、これを水又は油の中にて静水圧を
かけて成型する方法で湿式静水圧成型法と呼ばれ
る。この場合、完成成型体の形状にできるだけ近
い形状のゴム製容器を用いることによつて粉末使
用率を高くすることができ、しかもこの後の成型
加工工数が少くなくすることができる。 Conventionally, isostatic pressure molding is generally used to mold large or irregularly shaped products, but in this method, a mold with a shape close to the product shape is made in advance in a rubber container, filled with powder, and then molded. This is a method of molding by applying hydrostatic pressure in water or oil, and is called wet hydrostatic molding. In this case, by using a rubber container whose shape is as close as possible to the shape of the completed molded product, the powder usage rate can be increased, and the number of subsequent molding steps can be reduced.
しかしながら従来用いている合成ゴム、天然ゴ
ム製容器では肉厚が１mm〜10mmであり、あまり複
雑な形状のものは困難であり後工程の成型加工で
カバーしていた。特に第１図に示す如き大きい径
と小さい径との比が大きい場合、特にD1／D2比
が1.5以上の場合は厚いゴム容器を用いると成型
体にスベリを生じてなかなか良好な成型体が得ら
れなかつた。 However, conventionally used containers made of synthetic rubber or natural rubber have a wall thickness of 1 mm to 10 mm, making it difficult to create containers with very complicated shapes, which was covered by molding in the post-process. Especially when the ratio of the large diameter to the small diameter is large as shown in Figure 1, especially when the D 1 /D 2 ratio is 1.5 or more, if a thick rubber container is used, the molded product will slip and the molded product will not be very good. was not obtained.
本発明はかゝる問題を解決するためになされた
ものであり、容器の材料としてポリビニールクロ
ライド（PVC）を主成分とする高分子有機材料
を用いるのが特徴である。 The present invention was made to solve this problem, and is characterized by the use of a polymeric organic material whose main component is polyvinyl chloride (PVC) as the material for the container.
先ず目的形状の母型金型にシリコーンなどの離
型剥離剤を塗布し、50〜200℃に予熱しておく。
これをゾル状のPVC中に浸漬することによつて
母型金型表面にPVC膜を析出せしめる、次にこ
れを100〜200℃の温度に加熱してゲル化処理を行
い薄い容器膜を得るものである。 First, a mold release agent such as silicone is applied to a mother mold having the desired shape, and the mold is preheated to 50 to 200°C.
By immersing this in sol-like PVC, a PVC film is deposited on the surface of the master mold. Next, this is heated to a temperature of 100 to 200°C to undergo gelation treatment to obtain a thin container film. It is something.
上記において析出する膜厚は肉厚が0.5〜3.0mm
にするのが好ましい。この膜厚は浸漬時間と温度
によつて調節し得る。膜厚が0.5mm未満では強度
的に不充分であり、３mmを越えると成型体に亀裂
が入つて好ましくはない。 The thickness of the deposited film in the above case is 0.5 to 3.0 mm.
It is preferable to This film thickness can be adjusted by dipping time and temperature. If the film thickness is less than 0.5 mm, the strength is insufficient, and if it exceeds 3 mm, the molded product will crack, which is not preferable.
本発明の容器は従来のゴム容器に較べて薄いた
め弾性変形能が大きく、第１図のD1／D2が1.5以
上のものでもスベリを起すことなく製作すること
ができる。このD1／D2が大きい場合は小径部の
端面２を閉じることによつて特に良い結果が得ら
れることがわかつた。 Since the container of the present invention is thinner than conventional rubber containers, it has greater elastic deformability and can be manufactured without slippage even when D 1 /D 2 in FIG. 1 is 1.5 or more. It has been found that when D 1 /D 2 is large, particularly good results can be obtained by closing the end face 2 of the small diameter portion.
次に実施例によつて説明する。 Next, an example will be explained.
実施例
第１図に示す形状の母型をAlで製作し、この
表面にシリコーンを塗布し、95〜105℃に予熱し
ておき、これをPVC主成分のゾル状液に30分浸
漬し、これを150〜160℃で60分加熱しゲル化した
のち水冷してから離型した。これによつて肉厚
0.8〜１mmでL1＝220mm、L2＝150mm、D1＝80mm、
D2＝40mmのPVC容器を製作した。これに超硬合
金粉末を充填して真空脱気後、1.5T／cm2の圧力
で静水圧成型を行つた結果、良好な成型体が得ら
れた。Example A mother mold having the shape shown in Fig. 1 was made of Al, its surface was coated with silicone, it was preheated to 95-105°C, and it was immersed in a sol-like liquid mainly composed of PVC for 30 minutes. This was heated at 150 to 160°C for 60 minutes to form a gel, cooled with water, and then released from the mold. This makes the wall thicker.
0.8~1mm, L 1 = 220mm, L 2 = 150mm, D 1 = 80mm,
A PVC container with D 2 =40 mm was manufactured. This was filled with cemented carbide powder, vacuum degassed, and then hydrostatically molded at a pressure of 1.5 T/cm 2 , resulting in a good molded product.
同様の形状のものを肉厚３mmのゴム製容器を用
いて同圧力で静水圧成型した場合は小径、大径の
境界部でスベリを生じ製品としては供し得なかつ
た。 When a similar shaped product was hydrostatically molded at the same pressure using a rubber container with a wall thickness of 3 mm, slippage occurred at the boundary between the small diameter and the large diameter, and the product could not be used.
第１図は本発明の方法に対象となる容器の一例
を示す斜視図である。
FIG. 1 is a perspective view showing an example of a container to be used in the method of the present invention.
Claims (1)
形状の粉末冶金成型体の製造法において、ゾル状
のポリビニールクロライドを主成分とする高分子
有機材料中に、離型剥離剤を塗布した母型金型を
予め50〜200℃に予熱した状態で浸漬せしめて金
型表面に高分子膜を析出したのち100〜200℃の温
度に加熱しゲル化処理を行い該高分子製容器の肉
厚が0.5〜3.0mmであり、一端が閉じられた、ポリ
ビニールクロライド製の静水圧成型用容器を作製
し、該容器の中に粉末冶金用粉末原料を充填し、
しかる後静水圧成型することを特徴とする粉末冶
金成型体の製造法。1 In a method for manufacturing a powder metallurgy molded body having a shape in which the ratio of large diameter to small diameter is 1.5 or more, a release agent is applied to a polymeric organic material whose main component is polyvinyl chloride in the form of a sol. The mother mold is preheated to 50 to 200°C and immersed to deposit a polymer film on the mold surface, and then heated to a temperature of 100 to 200°C for gelation treatment to form the flesh of the polymer container. A container for isostatic pressing made of polyvinyl chloride with a thickness of 0.5 to 3.0 mm and closed at one end is produced, and a powder raw material for powder metallurgy is filled into the container,
A method for producing a powder metallurgy molded body, which is then subjected to isostatic pressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8450682A JPS58201609A (en) | 1982-05-18 | 1982-05-18 | Manufacturing method for powder metallurgy molded bodies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8450682A JPS58201609A (en) | 1982-05-18 | 1982-05-18 | Manufacturing method for powder metallurgy molded bodies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58201609A JPS58201609A (en) | 1983-11-24 |
| JPH0117448B2 true JPH0117448B2 (en) | 1989-03-30 |
Family
ID=13832524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8450682A Granted JPS58201609A (en) | 1982-05-18 | 1982-05-18 | Manufacturing method for powder metallurgy molded bodies |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58201609A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2517536B2 (en) * | 1987-08-31 | 1996-07-24 | 日本ゼオン株式会社 | Method for manufacturing medical conduit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5311960A (en) * | 1976-07-20 | 1978-02-02 | Kobayashi Kk | Method of producing delustered thermoplastic resin article |
| JPS54117556A (en) * | 1978-03-06 | 1979-09-12 | Shin Etsu Chem Co Ltd | Production of molded article of silicone rubber |
-
1982
- 1982-05-18 JP JP8450682A patent/JPS58201609A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58201609A (en) | 1983-11-24 |
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