JPH0276711A - Method for molding impeller of centrifugal hydraulic machinery and mold used therefor - Google Patents
Method for molding impeller of centrifugal hydraulic machinery and mold used thereforInfo
- Publication number
- JPH0276711A JPH0276711A JP22844988A JP22844988A JPH0276711A JP H0276711 A JPH0276711 A JP H0276711A JP 22844988 A JP22844988 A JP 22844988A JP 22844988 A JP22844988 A JP 22844988A JP H0276711 A JPH0276711 A JP H0276711A
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- mold
- molten resin
- side plate
- resin
- 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
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000000465 moulding Methods 0.000 title abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 35
- 229920005989 resin Polymers 0.000 claims abstract description 35
- 238000001746 injection moulding Methods 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims description 10
- 238000007689 inspection Methods 0.000 abstract description 9
- 238000005070 sampling Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 241000254158 Lampyridae Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
-
- 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
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/087—Propellers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、低融点金属等溶出除去可能な合金をコア（中
子）として用いた射出成形による樹脂の一体成形方法に
関し、特に、樹脂製遠心力流体機械の羽根車（以下、単
に遠心羽根車という。）の一体成形方法及び該方法に使
用するモールド金型に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for integrally molding a resin by injection molding using an alloy that can be eluted and removed, such as a low melting point metal, as a core. The present invention relates to a method for integrally molding an impeller for a centrifugal fluid machine (hereinafter simply referred to as a centrifugal impeller) and a mold used in the method.
従来、低融点合金からなるコアを用いて遠心羽根車を樹
脂成形する金型設計においては、第３図に示すよ５忙、
羽根車の内部流体通路（空間）部に相当する形状をした
コア成形品１の中心部を突出するよ５Ｋした幅木部（中
子押え部）２が一体く形成され、誼幅木部２と金型との
嵌め合いを緊密にするため、位置決めリング３が該幅木
部２と一体に埋め込まれている。Conventionally, when designing a mold for resin molding a centrifugal impeller using a core made of a low melting point alloy, there were five stages as shown in Figure 3.
A baseboard part (core holding part) 2 of 5K is integrally formed to protrude the center part of a core molded product 1 having a shape corresponding to the internal fluid passage (space) part of an impeller. A positioning ring 3 is embedded integrally with the baseboard portion 2 to ensure a tight fit between the baseboard portion 2 and the mold.
上記コア成形品１の位置決めリング３は、下部金型４の
幅木部に相当する空隙（凹部）４ａＫ緊密に嵌合されて
おり、また、該下部金型４の内面には、羽根車側板（シ
ュラウド）１５に相当する空隙４ｂが、また上部金型５
の内面には、羽根車主板１６に相当する空隙５ａがそれ
ぞれ形成されている。The positioning ring 3 of the core molded product 1 is tightly fitted into a gap (recess) 4aK corresponding to the baseboard of the lower mold 4, and the inner surface of the lower mold 4 has an impeller side plate. (shroud) 15 is also formed in the upper mold 5.
A void 5a corresponding to the impeller main plate 16 is formed on the inner surface of each of the impeller main plates 16.
樹脂製羽根車（製品）６を射出成形するに当り、図示の
よ５に上下金型５．４を型締めした後、注入ロアより金
型内に溶融樹脂を射出すると、スプルー８とランナｆ
−ト９を通って、該溶融樹脂は、矢印に示すように、羽
根車の主板側空隙ＳａＫ入り、次いでコア１の羽根相当
部の空隙１ａを経て、側板１５相当部の空隙４ｂＫ流入
して充填完了する：この際、コア１は、幅木部２が下部
金型４の空隙４ａの内面に緊密に嵌合支持され、また周
辺部１ｂが上下の両全型５．４０対向面によって挟持し
て支持されている。When injection molding a resin impeller (product) 6, after clamping the upper and lower molds 5.4 as shown in the figure, when molten resin is injected into the mold from the injection lower, the sprue 8 and runner f
- 9, the molten resin enters the gap SaK on the main plate side of the impeller, then passes through the gap 1a in the part corresponding to the blade of the core 1, and flows into the gap 4bK in the part corresponding to the side plate 15, as shown by the arrow. Filling is completed: At this time, the baseboard part 2 of the core 1 is tightly fitted and supported by the inner surface of the cavity 4a of the lower mold 4, and the peripheral part 1b is sandwiched by the opposing surfaces of both upper and lower molds 5.40. and is supported.
上記のように、金型４．５内にセットされたコア成形品
工は、第２ａ図に示すように、羽根車の吐出側１１から
吸込側１３へと羽根Ｃ＠）１３の巻き（曲率）が強いこ
と、また隣り合った羽根の間１４で狭いために、最初に
樹脂が充満する主板１６（第３図）側から圧力を受け、
変形し易い。As mentioned above, the core molding machine set in the mold 4.5 is moved from the discharge side 11 of the impeller to the suction side 13 as shown in FIG. 2a. ) is strong, and because the space between adjacent blades 14 is narrow, pressure is first applied from the main plate 16 (Fig. 3) side, which is filled with resin.
Easy to deform.
また樹脂温度の影響でコア成形品１の温度が上がり、そ
のためくも；ア自体が変形して、第４図（ａ）に示すよ
うに、製品化された羽根車６の主板！６が厚く、側板１
５が薄い成形品が出来てしまう。Furthermore, the temperature of the core molded product 1 rises due to the influence of the resin temperature, which causes the core molded product 1 to deform itself, resulting in the main plate of the manufactured impeller 6, as shown in FIG. 4(a). 6 is thick, side plate 1
5 will result in a thin molded product.
さら忙、主板の空隙部に樹脂が主に充填され側板が後に
なるため、ショートショートした場合は、側板側が充填
不足となる。Furthermore, the gap in the main plate is mainly filled with resin and the side plate comes later, so in the event of a short circuit, the side plate will be insufficiently filled.
そのため、主板１６と側板１５の厚み寸法にばらつきが
発生し、規定の許容限界寸法内に納まらないといプ間Ｍ
（トラブル）が生じた。As a result, variations occur in the thickness dimensions of the main plate 16 and the side plates 15, and if they do not fall within the specified allowable limit dimensions,
(Trouble) has occurred.
また、寸法のばらつき幅が大きいため、成形条件及び成
形品の全検査に多くの手間をかけるという問題点があっ
た。In addition, since there is a large variation in dimensions, there is a problem in that a lot of time and effort is required for molding conditions and all inspections of the molded product.
本発明は、上記の問題点を解決し、成形品である羽根車
の品質を安定させ、成形品検査を抜取り検査化して検査
工数の減少を可能とし、しかも成形品の蹟を向上させる
樹脂成形方法及び該方法に使用するモールド金型を提供
することを目的としている。The present invention solves the above problems, stabilizes the quality of the impeller, which is a molded product, reduces inspection man-hours by making molded product inspection into a sampling inspection, and improves the quality of the molded product. The object of the present invention is to provide a method and a mold for use in the method.
上記の目的を達成するためく、本発明の樹脂成形方法は
、羽根車の内部流体通路部に相当する形状のコア成形品
を、°射出成形機のモールド金型にセットし、型締後、
溶融樹脂を上記金型内に射出成形する遠心力流体機械の
羽根車成形方法において、スプルー及びゲートを通過し
た溶融樹脂を羽根車のマウスリングとボス部から同時に
流し始め、主板と側板との空隙部にバランスよく均等に
充填することを特徴としている。In order to achieve the above object, the resin molding method of the present invention involves setting a core molded product having a shape corresponding to the internal fluid passage of an impeller in a mold of an injection molding machine, and after clamping the mold.
In an impeller forming method for a centrifugal fluid machine in which molten resin is injection molded into the mold, the molten resin that has passed through the sprue and gate begins to flow simultaneously from the mouth ring and boss of the impeller, filling the gap between the main plate and the side plate. It is characterized by filling the parts evenly and in a well-balanced manner.
上記マウスリングとボス部にそれぞれ設けられた羽根車
の羽根数と同数のピンｒ−トを経て、溶融樹脂をマウス
リングとボスから同時に流し始めることを特徴としてい
る。It is characterized in that the molten resin begins to flow from the mouth ring and the boss at the same time through the same number of pins as the number of impeller blades provided on the mouth ring and the boss, respectively.
上記成形方法に使用する射出成形機のモールド金型は、
羽根車の羽根数と同数のピンゲートを羽根車のマウスリ
ングとボス部にそれぞれ設けたことを特徴としている。The mold of the injection molding machine used for the above molding method is
It is characterized by having the same number of pin gates as the number of impeller blades on the mouth ring and boss part of the impeller.
本発明は上記のよ５に構成されているので、樹脂製羽根
車を射出成形するに当り、コ、ア成形品をモールド金型
にセットし、”型締後、溶融樹脂を上記金型内に射出す
ると、該溶融樹脂は、スプルー（注入路）と、分配路忙
相当するランチを経て、羽根数と同数のピンゲートより
、ボス部とマウスリング部へ同時に流れ出し、主板と側
板に相当する空隙部に該樹脂が均等に充填される。Since the present invention is constructed as described in 5 above, when injection molding a resin impeller, the core and When injected, the molten resin passes through a sprue (injection path) and a launch corresponding to the distribution path, and simultaneously flows out from pin gates with the same number of blades to the boss part and mouth ring part, and fills the gap corresponding to the main plate and side plate. The area is evenly filled with the resin.
これによって、コア成形品を変形させる無理な力がかか
らないので、バランスのとれた成形となり、規定通りの
厚み寸法をもった遠心羽根車の成形品が得られる。As a result, an unreasonable force that deforms the core molded product is not applied, resulting in well-balanced molding, and a centrifugal impeller molded product having a prescribed thickness dimension can be obtained.
次に、本発明の実施例を図面と共に説明する。 Next, embodiments of the present invention will be described with reference to the drawings.
第１図は、樹脂製の遠心羽根車を成形する射出成形機の
モールド金型の一実施例を示す断面図であって、図中、
第３図に記載した符号と同一の符号は同一ないし同類の
ものを示すものとする。FIG. 1 is a sectional view showing an embodiment of a mold die of an injection molding machine for molding a centrifugal impeller made of resin, and in the figure,
The same reference numerals as those shown in FIG. 3 indicate the same or similar items.
図において、コア成形品１は、第２図（ハ）Ｋも示すよ
うに、遠心羽根車の内部流体通路（空隙）罠相当する形
状をなし、前方（図で左方）に突出して形成された幅木
部（中子弁え）２には、普通鋼、特殊鋼特にステンレス
鋼又はアルミ合金等からなる位置決めリング３が一体に
埋め込まれている。In the figure, the core molded product 1 has a shape corresponding to the internal fluid passage (gap) trap of a centrifugal impeller, and is formed to protrude forward (to the left in the figure), as also shown in FIG. A positioning ring 3 made of ordinary steel, special steel, particularly stainless steel, or aluminum alloy is integrally embedded in the baseboard portion (core valve) 2.
上記コア成形品１の位置決めリング３は、第１図に示す
よ５に上部金型５０幅木部に相当する空隙（凹部）５ａ
Ｋ緊密に嵌合されており、また、該上部金型５の内面に
は、羽根車側板（シュラクト）１５に相当する空隙５ｂ
が、また下部金型４の内面には、羽根車主板１６に相当
する空隙４ａがそれぞれ形成されている。As shown in FIG. 1, the positioning ring 3 of the core molded product 1 has a gap (recess) 5a corresponding to the baseboard of the upper mold 50.
K is tightly fitted, and the inner surface of the upper mold 5 has a gap 5b corresponding to the impeller side plate 15.
However, on the inner surface of the lower mold 4, gaps 4a corresponding to the impeller main plate 16 are formed.
上部金型５の上面忙は、溶融樹脂注入ロアに通じるスプ
ルー８と、該スプルー８に連通されたランナ２１が設け
られ、該ランナ２１には、位置決めリング３を貫通して
ボス部に溶融樹脂を注入する、羽根数と同数のピン？−
１（射出成形において、材料がスプルーからキャピテイ
に流入する所に設けた直径又は最大寸法−０，７６＋ｗ
以下のオリフィスをいう。）２２と、側板１５の入口部
のマウスリング１５ａに溶融樹脂を注入する、羽根（翼
）数と同数のピンゲート ２３がそれぞれ連接されてい
る。図中、１８は樹脂凝固螢、コア成形品１を取り出す
ための押出しピンである。The upper surface of the upper mold 5 is provided with a sprue 8 communicating with the molten resin injection lower and a runner 21 connected to the sprue 8. Inject the same number of pins as the number of blades? −
1 (in injection molding, the diameter or maximum dimension provided where material flows from the sprue into the cavity -0.76+w
Refers to the following orifice. ) 22 and pin gates 23 of the same number as the number of blades (wings) for injecting molten resin into the mouth ring 15a at the inlet of the side plate 15 are connected to each other. In the figure, 18 is an extrusion pin for taking out the core molded product 1 from the resin solidification firefly.
樹脂製羽根車（製品）６を射出成形するに当り、図示の
よ５に上下金型５．４を型締めした後、注入ロアより金
型内に溶融樹脂を射出すると、スプルー８、ランナ２１
を経て、羽根数と同数配設された各ピング−）２２．２
３より、羽根車ボス部１７と側板１５のマウスリング１
５ ａ部とへ同時に溶融樹脂が流れ出し、主板１６と側
板１５に相当する空隙部４ａと５ｂＫ樹脂が均等に充填
される。When injection molding a resin impeller (product) 6, after clamping the upper and lower molds 5.4 as shown in the figure, when molten resin is injected into the mold from the injection lower, the sprue 8, runner 21
After that, each pin arranged in the same number as the number of blades -) 22.2
3, the impeller boss portion 17 and the mouth ring 1 of the side plate 15
At the same time, the molten resin flows out to part 5a, and the voids 4a and 5b corresponding to the main plate 16 and side plate 15 are evenly filled with the K resin.
なお、羽根車ボス部１７と側板１５のマウスリング１５
ａ部とへ同時に流す場合、主板１６と側板１５の容積の
差と注入圧力の関係から、バランス良く主板１６と側板
ｉｓ＃！ｃ注入、充填できるよう、ボス部とマウスリン
グの？−）寸法を調整することはいうまでもない。Note that the impeller boss portion 17 and the mouth ring 15 of the side plate 15
When flowing to part a at the same time, the relationship between the volume difference between the main plate 16 and the side plate 15 and the injection pressure ensures that the main plate 16 and the side plate is #! in a well-balanced manner. C.Boss part and mouth ring for injection and filling? -) It goes without saying that the dimensions must be adjusted.
これによって、コア成形品１を変形させるような無理な
力がかからないので、バランスのとれた成形となり、第
４図■に示すような規定通りの厚み寸法をもった遠心羽
根車の成形品６を得ることができる。This prevents the application of excessive force that would deform the core molded product 1, resulting in well-balanced molding, resulting in a centrifugal impeller molded product 6 having the specified thickness as shown in Figure 4 (■). Obtainable.
なお、上記中子ｌは、低融点金属等、例えば鉛及び錫を
主体とした物質からなり、また注入ロアから注入される
樹脂は、通常、？リアミド、ポリプロピレン、ＡＢＳ（
アクリロニトリル・ツタジエン黒チレン樹脂）、ポリエ
チレン、プリカーボネート等が多（使用される。The core 1 is made of a low-melting point metal, for example, a substance mainly consisting of lead and tin, and the resin injected from the injection lower is usually ? Liamide, polypropylene, ABS (
Acrylonitrile/tutadiene black ethylene resin), polyethylene, precarbonate, etc. are often used.
上記のよ５Ｋｔ、て成形されたあと、コア１は、所定温
度（低融点金属等の溶出除去可能な材料の溶融点以上、
羽根車樹脂の熱変形温度以下の温度）忙加温し溶融して
取り除かれる。After being molded at 5Kt as described above, the core 1 is heated to a predetermined temperature (above the melting point of a material that can be eluted and removed, such as a low melting point metal).
(temperature below the thermal deformation temperature of the impeller resin) is heated, melted and removed.
なお、本実施例のように、位置決めリングを用いたモー
ルド金型以外の金型であっても、本発明の実施は可能で
ある。Note that the present invention can be implemented using a mold other than a mold using a positioning ring as in this embodiment.
以上説明したように、本発明によれば、モールド金型内
に射出された溶融樹脂をマウスリングとボス部から同時
に流し始めるよ５にしたことＫより、該溶融樹脂の流れ
は、羽根車の主板と側板の両空隙部へとバランスよく均
等に充填される。さらに、ピンゲートを多点に翼間に真
数だけ設けたことＫより、変形し易い成形品を製造する
場合、歪や変形を少なくすることができるよ５になり、
全周方向に、バランスよく流れるようになる。このこと
により、コアを変形させる力が相殺されて、コアの両側
面から無理な力がかからないので、規定通りの厚み寸法
をもった遠心羽根車の成形品を作ることができる。As explained above, according to the present invention, the molten resin injected into the mold starts flowing from the mouth ring and the boss at the same time. The gaps between the main plate and side plates are filled evenly and in a well-balanced manner. Furthermore, by providing pin gates at multiple points and in the same number of spaces between the blades, distortion and deformation can be reduced when manufacturing molded products that are easily deformed.
It will flow in a well-balanced manner around the entire circumference. This cancels out the forces that deform the core and prevents undue force from being applied from both sides of the core, making it possible to produce a centrifugal impeller molded product with a specified thickness.
従って、成形品である遠心羽根車の品質を安定させ、成
形品検査を抜取り検査化して検査工数を減らすことが可
能となり、しかも遠心羽根車の品質向上を計ることがで
きる。Therefore, it is possible to stabilize the quality of the centrifugal impeller, which is a molded product, to reduce the number of inspection steps by conducting sampling inspections for molded product inspection, and to improve the quality of the centrifugal impeller.
第１図は本発明の樹脂製遠心羽根車を成形するのに用い
るモールド金型の一実施例を示す断面図、第２図（ω及
び（ロ）はコア成形品の平面図及び断面図、第３図は従
来例を示すモールド金型の断面図、第４図（ロ）は従来
の方法で成形された遠心羽根車の断面図、同図ら）は本
発明の方法で成形された遠心羽根車の断面図である。
１・・・コア成形品、 ３・・・位置決めリング、４
．５・・・金型、 ６・・・遠心羽根車（製品）、８・
・・スプルー、 １５・・・側板、 １５ａ・・・
ライナリング、 １６・・・主板１．２１・・・ラン
ナ、２２．２３・・・ピンゲート。
第４図Fig. 1 is a sectional view showing an embodiment of a mold used for molding the resin centrifugal impeller of the present invention, Fig. 2 (ω and (b) are a plan view and a sectional view of a core molded product, Fig. 3 is a cross-sectional view of a molding die showing a conventional example, Fig. 4 (b) is a cross-sectional view of a centrifugal impeller molded by the conventional method, and Fig. 4(b) is a cross-sectional view of a centrifugal impeller molded by the method of the present invention. It is a sectional view of a car. 1... Core molded product, 3... Positioning ring, 4
．． 5... Mold, 6... Centrifugal impeller (product), 8...
... Sprue, 15... Side plate, 15a...
Liner ring, 16...Main plate 1.21...Runner, 22.23...Pin gate. Figure 4
Claims (1)
成形品を、射出成形機のモールド金型にセットし、型締
後、溶融樹脂を上記金型内に射出成形する遠心力流体機
械の羽根車成形方法において、スプルー及びゲートを通
過した溶融樹脂を羽根車のマウスリングとボス部から同
時に流し始め、主板と側板との空隙部にバランスよく均
等に充填することを特徴とする遠心力流体機械の羽根車
の成形方法。 ２、羽根車の羽根数と同数のピンゲートを羽根車のマウ
スリングとボス部にそれぞれ設け、これらのピンゲート
を経て溶融樹脂をマウスリングとボス部から同時に流し
始め、主板と側板との空隙部にバランスよく均等に充填
することを特徴とする請求項１記載の遠心力流体機械の
羽根車の成形方法。 ３、羽根車の羽根数と同数のピンゲートを羽根車のマウ
スリングとボス部にそれぞれ設けたことを特徴とする遠
心力流体機械の羽根車成形用射出成形機のモールド金型
。[Claims] 1. A core molded product having a shape corresponding to the internal fluid passage of an impeller is set in a mold of an injection molding machine, and after the mold is clamped, molten resin is injected into the mold. In a method for forming an impeller of a centrifugal fluid machine, the molten resin that has passed through the sprue and gate begins to flow simultaneously from the mouth ring and boss of the impeller, filling the gap between the main plate and side plate evenly and in a well-balanced manner. A method for forming an impeller for a centrifugal fluid machine, characterized by: 2. Install the same number of pin gates as the number of impeller blades on the mouth ring and boss part of the impeller, and through these pin gates, the molten resin starts flowing from the mouth ring and boss part at the same time, and flows into the gap between the main plate and the side plate. 2. The method of forming an impeller for a centrifugal fluid machine according to claim 1, wherein the impeller is filled evenly in a well-balanced manner. 3. A mold for an injection molding machine for forming an impeller of a centrifugal fluid machine, characterized in that the same number of pin gates as the number of blades of the impeller are provided on the mouth ring and boss portion of the impeller, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22844988A JPH0276711A (en) | 1988-09-14 | 1988-09-14 | Method for molding impeller of centrifugal hydraulic machinery and mold used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22844988A JPH0276711A (en) | 1988-09-14 | 1988-09-14 | Method for molding impeller of centrifugal hydraulic machinery and mold used therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0276711A true JPH0276711A (en) | 1990-03-16 |
Family
ID=16876668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22844988A Pending JPH0276711A (en) | 1988-09-14 | 1988-09-14 | Method for molding impeller of centrifugal hydraulic machinery and mold used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0276711A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011025558A (en) * | 2009-07-27 | 2011-02-10 | Hoshizaki Electric Co Ltd | Method of producing motor side coupling member of beverage dispenser and motor side coupling member |
| CN111300293A (en) * | 2018-12-11 | 2020-06-19 | 无锡众鑫模具科技有限公司 | Impeller core assembly clamp and production process thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62212113A (en) * | 1986-03-13 | 1987-09-18 | Kinugawa Rubber Ind Co Ltd | Manufacture of window weatherstrip |
| JPS62282912A (en) * | 1986-02-26 | 1987-12-08 | ザ・バツド・コムパニ− | Method of molding fiber reinforced structure |
| JPS63112127A (en) * | 1986-10-30 | 1988-05-17 | Hashimoto Forming Co Ltd | Manufacture of frame part of plate-like molding |
-
1988
- 1988-09-14 JP JP22844988A patent/JPH0276711A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62282912A (en) * | 1986-02-26 | 1987-12-08 | ザ・バツド・コムパニ− | Method of molding fiber reinforced structure |
| JPS62212113A (en) * | 1986-03-13 | 1987-09-18 | Kinugawa Rubber Ind Co Ltd | Manufacture of window weatherstrip |
| JPS63112127A (en) * | 1986-10-30 | 1988-05-17 | Hashimoto Forming Co Ltd | Manufacture of frame part of plate-like molding |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011025558A (en) * | 2009-07-27 | 2011-02-10 | Hoshizaki Electric Co Ltd | Method of producing motor side coupling member of beverage dispenser and motor side coupling member |
| CN111300293A (en) * | 2018-12-11 | 2020-06-19 | 无锡众鑫模具科技有限公司 | Impeller core assembly clamp and production process thereof |
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