JPH0460015B2 - - Google Patents
Info
- Publication number
- JPH0460015B2 JPH0460015B2 JP297485A JP297485A JPH0460015B2 JP H0460015 B2 JPH0460015 B2 JP H0460015B2 JP 297485 A JP297485 A JP 297485A JP 297485 A JP297485 A JP 297485A JP H0460015 B2 JPH0460015 B2 JP H0460015B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- blade
- ejector pin
- inner mold
- draft angle
- 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
- 239000000758 substrate Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 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)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はシロツコフアンの射出成形用金型に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a mold for injection molding of Sirotskov fan.
〔従来技術）
シロツコフアンは第６図に示すように円形基板
１の周縁部下面に断面円弧形に形成された多数枚
の羽根２を突設したものであつて、その成形用金
型は、第１図に示すように、主として上型３、内
外型４，５とでキヤビテイ６を組み立ててあつ
て、そのうち内外型４，５間に羽根２の成形部２
ａが形成され、羽根２の成形部２ａには抜き勾配
が設けられている。[Prior Art] As shown in FIG. 6, the Shirotsko fan has a large number of blades 2 having an arcuate cross section projecting from the lower surface of the periphery of a circular substrate 1, and its molding die is as follows: As shown in FIG. 1, a cavity 6 is assembled mainly with an upper mold 3 and inner and outer molds 4 and 5, of which a molded part 2 of the blade 2 is placed between the inner and outer molds 4 and 5.
a is formed, and the molded portion 2a of the blade 2 is provided with a draft angle.
しかし羽根は長い関係でその抜き取りに抵抗が
大きいため、成形品の抜き取り時にエジエクタピ
ン１０が成形品の基板１を突き破るトラブルが発
生するという問題があつた。 However, since the blades are long and have a large resistance to removal, there is a problem in that the ejector pin 10 breaks through the substrate 1 of the molded product when the molded product is extracted.
この問題を解決するためには、成形品の抜き取
りにエジエクタピン１０に掛かる負担を軽減すれ
ばよいので、その方法として、エジエクタピン１
０と同時に内型４が少し（３分の１ないし２分の
１）上動し、次でエジエクタピンのみが上動する
ように金型を構成したところ、予期に反して却つ
て成形品を抜き取ることはできなかつた。 In order to solve this problem, it is only necessary to reduce the load placed on the ejector pin 10 when removing the molded product.
When the mold was configured so that the inner mold 4 moved up a little (1/3 to 1/2) at the same time as zero, and then only the ejector pin moved up, the molded product unexpectedly was pulled out. I couldn't do that.
その原因を様々な観点から追求してみると、内
型４にはその分割面１２に内型４の抜き勾配が設
けられているが、内型と外型との間に少しでもず
れがあつて、内型４の分割面１２が羽根の成形部
２ａ内にずれ出していると、そのずれ出し面１２
ａが羽根２の抜き出しに対して逆勾配になるから
と考えられ、数多くの実験結果では、製品上何ら
問題とならない極くわずかのずれであつても羽根
の抜き取りの障害となることが判明した。 When we investigate the cause from various perspectives, we find that although the inner mold 4 has a draft angle on its dividing surface 12, if there is even a slight misalignment between the inner mold and the outer mold. If the dividing surface 12 of the inner mold 4 is displaced into the molded part 2a of the blade, the displaced surface 12
This is thought to be because a is at an opposite slope to the removal of the blade 2, and numerous experimental results have shown that even a very slight deviation, which does not pose any problem in the product, becomes an obstacle to the removal of the blade. .
この発明は上記のような観点に基づいてなされ
たもので、内外型間のずれに基づいて羽根成形部
内面に段差ができていても、羽根の抜き取りに支
障にならにいようにすることを目的としたもので
ある。
This invention has been made based on the above-mentioned viewpoints, and it is an object of the present invention to prevent the step from forming on the inner surface of the blade molding part due to the misalignment between the inner and outer molds from interfering with the removal of the blade. This is the purpose.
すなわちこの発明は、内型と外型との間に羽根
の成形部を形成し、外型に基板を突き上げるエジ
エクタピンの通し孔を設けたシロツコフアンの射
出成形用金型において、成形品の抜き出しにつ
き、その初段階で内型がエジエクタピンと共に上
動し次段階でエジエクタピンのみが上動するよう
に構成し、且つ外型に対する内型の抜き勾配を羽
根の抜き勾配よりも小さく形成したものである。
That is, the present invention provides an injection mold for a Shirotsko fan, in which a blade molding part is formed between an inner mold and an outer mold, and a through hole for an ejector pin for pushing up a substrate is provided in the outer mold. In the first stage, the inner mold moves upward together with the ejector pin, and in the next stage, only the ejector pin moves upward, and the draft angle of the inner mold with respect to the outer mold is made smaller than the draft angle of the blade.
シロツコフアンＳの成形用キヤビテイ６のう
ち、基板１の成形部１ａは主として上型３の下面
に、また羽根２の成形部２ａは内型４と外型５間
にそれぞれ形成されている。そして羽根２の成形
部２ａは内外型４，５の分割面１２，１３にそれ
ぞれ設けられた溝７，８が合体して断面三ケ月形
になるように形成してある。また分割面１２，１
３に内型４の抜き勾配を、羽根成形部２ａに羽根
２の抜き勾配をそれぞれ設けてあつて、そのうち
内型４の抜き勾配を約５分程度に、羽根２の抜き
勾配を約10分程度にしてある。
In the molding cavity 6 of the Shirotsuko fan S, the molding portion 1a of the substrate 1 is mainly formed on the lower surface of the upper mold 3, and the molding portion 2a of the blade 2 is formed between the inner mold 4 and the outer mold 5, respectively. The molded portion 2a of the blade 2 is formed so that the grooves 7 and 8 provided in the dividing surfaces 12 and 13 of the inner and outer molds 4 and 5, respectively, are combined to form a crescent-shaped cross section. Also, the dividing plane 12,1
The draft angle of the inner mold 4 is set at 3, and the draft angle of the blade 2 is set at the blade forming part 2a, and the draft angle of the inner mold 4 is set at about 5 minutes, and the draft angle of the wing 2 is set at about 10 minutes. It has been set to a certain extent.
したがつて内型４と外型５を組み合わせて第４
図の如く平面的に見た場合には、分割面１２，１
３の上下端縁１７，１８間の距離L1は外型５の
溝の外側端部１６の上下端縁１９，２０間の距離
L2よりも小さくその約半分となつている。 Therefore, by combining the inner mold 4 and the outer mold 5, the fourth
When viewed planarly as shown in the figure, the dividing planes 12, 1
The distance L 1 between the upper and lower edges 17 and 18 of 3 is the distance between the upper and lower edges 19 and 20 of the outer edge 16 of the groove of the outer mold 5.
It is smaller than L 2 and is about half that size.
また内型４の中心部にそれを持ち上げるエジエ
クタロツド９を螺着し、外型５には各溝８，８間
にエジエクタピン１０の通し孔１１を設けてあ
る。そして成形品の抜き取り過程において、まず
外型５に対して内型４とエジエクタピン１０が３
分の１程度持ち上がり、次でエジエクタピン１０
のみが持ち上がるように構成されている。 Further, an ejector rod 9 for lifting the inner mold 4 is screwed into the center thereof, and a through hole 11 for an ejector pin 10 is provided between each groove 8 in the outer mold 5. In the process of extracting the molded product, first, the inner mold 4 and ejector pin 10 are placed in three positions relative to the outer mold 5.
Lift it up by about 1/2, then press the ejector pin 10
It is configured so that only the chisel can be lifted up.
そこで今度は内外型４，５のずれに基づいて羽
根成形部２ａの両溝７，８の組合せに段差Ｄが生
じていると仮定し、且つその差Ｄや勾配を図面上
極端に表わして成形品の抜き取りについて説明す
る。 Therefore, this time, it is assumed that a step D is generated in the combination of both grooves 7 and 8 of the blade forming part 2a based on the misalignment of the inner and outer molds 4 and 5, and the difference D and slope are expressed extremely in the drawing and molding is carried out. Explain how to extract items.
羽根成形部２ａ内には両溝７，８の段差Ｄによ
つて内型４の分割面１２のずれ出し面１２ａと外
型５の分割面１３のずれ出し面１３ａとが突出し
ている（第４図）。そのためこの成形部２ａで羽
根２が成形されると、羽根２の両側面にはずれ出
し面１２ａ，１３ａで成形された段部面１４，１
５が生じる。 In the blade forming part 2a, the offset surface 12a of the dividing surface 12 of the inner mold 4 and the offset surface 13a of the dividing surface 13 of the outer mold 5 protrude due to the step D of both grooves 7 and 8 (No. Figure 4). Therefore, when the blade 2 is molded in this molding part 2a, stepped surfaces 14, 1 are formed with protruding surfaces 12a, 13a on both sides of the blade 2.
5 occurs.
第１図はプラスチツクの材料が金型に射出され
た状態を示したものであるが、成形品を抜き出す
ときには、上型３が外された後、第２図に示すよ
うに、内型４とエジエクタピン１０とが同時に持
ち上がる。この過程では成形品が内型４と結合し
て垂直に上動し、このときに羽根２は外型５の分
割ずれ出し面１３ａと溝８内面と擦り合うが、そ
の抜き勾配にしたがつて外型５の溝８から３分の
１だけ抜ける。 Figure 1 shows the plastic material being injected into the mold, but when the molded product is extracted, after the upper mold 3 is removed, the inner mold 4 and the inner mold 4 are removed, as shown in Figure 2. The ejector pin 10 is lifted at the same time. In this process, the molded product is combined with the inner mold 4 and moves vertically upward, and at this time, the blades 2 rub against the split displacement surface 13a of the outer mold 5 and the inner surface of the groove 8, but according to the draft angle. Only 1/3 of it will come out of the groove 8 of the outer mold 5.
次にエジエクタピン１０のみが持ち上がつて第
２図一点鎖線で示すようにそれにより成形品が突
き上げられるときは、今度は羽根２が内型４の溝
７からも抜ける。この際において内型４の分割ず
れ出し面１２ａは羽根２の抜き出しにつき逆勾配
となつているため、羽根２は段部面１４が逆勾配
の分割ずれ出し面１２ａと擦り合うことによつて
外型５の溝８側へ押しやられる（矢印Ｐ）。しか
しその分割ずれ出し面１２ａの勾配は外型５の溝
８の外側端部１６の勾配よりも小さい関係で、外
型５の溝８は逆勾配による羽根２のずれをどこま
でも吸収するので、その逆勾配は羽根２が抜ける
障害にはならない。 Next, when only the ejector pin 10 is lifted and the molded product is pushed up as shown by the dashed line in FIG. 2, the blade 2 also comes out of the groove 7 of the inner mold 4. At this time, since the divided displacement surface 12a of the inner mold 4 has a reverse slope for extracting the blade 2, the blade 2 is removed by rubbing the stepped surface 14 against the divided displacement surface 12a having a reverse slope. It is pushed toward the groove 8 side of the mold 5 (arrow P). However, the slope of the divided deviation surface 12a is smaller than the slope of the outer end 16 of the groove 8 of the outer mold 5, and the groove 8 of the outer mold 5 absorbs any displacement of the blade 2 due to the reverse slope. The reverse slope does not become an obstacle for the blade 2 to come off.
なおこの障害を有効に除去するためには、内型
４の抜き勾配は羽根２の抜き勾配の約80％以下で
あることが望ましい。 In order to effectively eliminate this obstacle, it is desirable that the draft angle of the inner mold 4 is approximately 80% or less of the draft angle of the blades 2.
この発明によるシロツコフアンの射出成形用金
型は、以上説明したように内型と外型との間に羽
根の成形部を形成し、外型に基板を突き上げるエ
ジエクタピンの通し孔を設けたシロツコフアンの
射出成形用金型において、成形品の抜き出しにつ
き、その初段階で内型がエジエクタピンと共に上
動し、次段階でエジエクタピンのみが上動するよ
うに構成し、且つ外型に対する内型の抜き勾配を
羽根の抜き勾配よりも小さく形成したので、成形
品を抜き出す初段階においてエジエクタピンが成
形品の基板を突き破るのを防止でき、また内外型
間にずれがあつても確実に成形品を抜き取り得る
ので、シロツコフアンの生産性を高め、その歩留
まりの向上を図る上において顕著な効果を発揮す
るものである。
As explained above, the injection mold for Shirodskov fan according to the present invention has a blade molding part formed between the inner mold and the outer mold, and a through hole for the ejector pin that pushes up the substrate in the outer mold. The mold for molding is configured so that the inner mold moves upward together with the ejector pin in the first stage, and only the ejector pin moves upward in the next stage, and the draft angle of the inner mold with respect to the outer mold is set by a blade. Since the ejector pin is formed to be smaller than the draft angle of the molded product, it is possible to prevent the ejector pin from breaking through the substrate of the molded product at the initial stage of ejecting the molded product, and even if there is a misalignment between the inner and outer molds, the molded product can be reliably extracted. This method is highly effective in increasing productivity and yield.
図面はこの発明の一実施例を示し、第１図はプ
ラスチツク材料の射出完了時における金型の要部
縦断面図、第２図は成形品の抜き出し動作を示す
要部縦断面図、第３図は第１図Ａ−Ａ線矢視の断
面図、第４図は羽根の成形部を示す説明図、第５
図は羽根の拡大横断面図、第６図はシロツコフア
ンの斜視図である。
Ｓ…シロツコフアン、１…シロツコフアンの基
板、１ａ…基板の成形部、２…羽根、２ａ…羽根
の成形部、３…上型、４…内型、５…外型、６…
キヤビテイ、７，８…溝、１０…エジエクタピ
ン。
The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of the main part of the mold upon completion of injection of plastic material, FIG. 2 is a longitudinal cross-sectional view of the main part showing the operation of extracting the molded product, and FIG. The figures are a sectional view taken along the line A-A in Figure 1, Figure 4 is an explanatory diagram showing the molded part of the blade, and Figure 5
The figure is an enlarged cross-sectional view of the blade, and FIG. 6 is a perspective view of the Sirotskov fan. S...Shirotskov fan, 1...Shirotskov fan substrate, 1a...Molded part of substrate, 2...Blade, 2a...Blade molded part, 3...Upper mold, 4...Inner mold, 5...Outer mold, 6...
Cavity, 7, 8...Groove, 10...Ejector pin.
Claims (1)
外型に基板を突き上げるエジエクタピンの通し孔
を設けたシロツコフアンの射出成形用金型におい
て、成形品の抜き出しにつき、その初段階で内型
がエジエクタピンと共に上動し、次段階でエジエ
クタピンのみが上動するように構成し、且つ外型
に対する内型の抜き勾配を羽根の抜き勾配よりも
小さく形成したことを特徴とするシロツコフアン
の射出成形用金型。1 Forming the molded part of the blade between the inner mold and the outer mold,
In the injection mold for Shirotsuko fan, which has a through hole for the ejector pin that pushes up the substrate in the outer mold, when the molded product is extracted, the inner mold moves upward together with the ejector pin in the first stage, and only the ejector pin moves upward in the next stage. A mold for injection molding a Sirotskov fan, characterized in that the draft angle of the inner mold with respect to the outer mold is smaller than the draft angle of the blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP297485A JPS61162313A (en) | 1985-01-11 | 1985-01-11 | Injection mold of sirocco fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP297485A JPS61162313A (en) | 1985-01-11 | 1985-01-11 | Injection mold of sirocco fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61162313A JPS61162313A (en) | 1986-07-23 |
| JPH0460015B2 true JPH0460015B2 (en) | 1992-09-24 |
Family
ID=11544339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP297485A Granted JPS61162313A (en) | 1985-01-11 | 1985-01-11 | Injection mold of sirocco fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61162313A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643621A (en) * | 1987-06-26 | 1989-01-09 | Konishiroku Photo Ind | Manufacture of rotating polygon mirror |
| JPH01285823A (en) * | 1988-05-13 | 1989-11-16 | Tokico Ltd | Manufacture of turbine rotor |
| DE19519873C1 (en) * | 1995-05-31 | 1996-07-25 | Bosch Gmbh Robert | Injection mould for prodn. of components with inclined chambers in each face |
| JP3653144B2 (en) * | 1996-06-28 | 2005-05-25 | 東芝キヤリア株式会社 | Cross flow fan, fan piece mold and fan piece mold production method |
| KR101351093B1 (en) * | 2010-08-02 | 2014-01-14 | 삼성전자주식회사 | A Blowing Fan and Vibration Absorbing Boss thereof |
-
1985
- 1985-01-11 JP JP297485A patent/JPS61162313A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61162313A (en) | 1986-07-23 |
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