JPS61233515A - Gate bush for mold - Google Patents
Gate bush for moldInfo
- Publication number
- JPS61233515A JPS61233515A JP7555985A JP7555985A JPS61233515A JP S61233515 A JPS61233515 A JP S61233515A JP 7555985 A JP7555985 A JP 7555985A JP 7555985 A JP7555985 A JP 7555985A JP S61233515 A JPS61233515 A JP S61233515A
- Authority
- JP
- Japan
- Prior art keywords
- main body
- gate bush
- mandrel
- bush main
- gate
- 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.)
- Granted
Links
- 238000005323 electroforming Methods 0.000 claims abstract description 10
- 238000000465 moulding Methods 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 229910000531 Co alloy Inorganic materials 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 229910000990 Ni alloy Inorganic materials 0.000 abstract 1
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005498 polishing Methods 0.000 description 3
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
Abstract
Description
【発明の詳細な説明】
この発明は成形金属本体に組込まれ、ランナとキャビテ
ィとを連通させる成形金型用ゲートブッシュに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gate bush for a molding die that is incorporated into a molded metal body and communicates a runner with a cavity.
グラスチック成形品を成形する射出成形用金型は、一般
に第１図に示すように構成されている。すなわち、１は
固定金：型で、２は可動金型である。固定金型１にはノ
ズルタッチ３を有するスプル４が設けられ、ランナ５，
５と連通している。また、固定金型１と可動金型２には
キャビティ６．６が形成され、これらキャビティ６．６
はゲートブッシュ７を介して上記ランナ５に連通してい
る。An injection mold for molding a plastic molded product is generally constructed as shown in FIG. That is, 1 is a fixed mold: a mold, and 2 is a movable mold. The fixed mold 1 is provided with a sprue 4 having a nozzle touch 3, and a runner 5,
It communicates with 5. Further, cavities 6.6 are formed in the fixed mold 1 and the movable mold 2, and these cavities 6.6
communicates with the runner 5 via a gate bush 7.
そして、上記スプル４のノズルタッチ３に射出成形機の
ノズル８を接合し、加熱溶融樹脂を射出すると、この溶
融樹脂はスプル４を介してランナ５，５に流れ、さら・
にゲートブツシュ７゜７を介してキャビティ６．６ｊｐ
ニー充填されるようになっている。Then, when the nozzle 8 of the injection molding machine is connected to the nozzle touch 3 of the sprue 4 and the heated molten resin is injected, this molten resin flows through the sprue 4 to the runners 5, 5, and further...
through the gate bush 7゜7 into the cavity 6.6jp
The knee is supposed to be filled.
ところで、上記ｆ−）ブツシュ７にはテーノ！孔９が設
けられ、その内周面は平滑できないと抵抗が大きく溶融
樹脂の流動性が阻害され、成形に支障を１きたすことは
勿論である。そこで、従来においては、鉄材からなる円
柱状のｒ−トプッシ、材にその軸方向にドリル加工によ
って貫通孔を穿設し、この貫通孔をテーパ４リーマによ
ってテーパ孔９に仕圧げ、さらに、そのテーパ孔９の内
周面をサンドペーパあるいは砥石によって鏡面仕上げし
ていた。ところが、上記テ−パ孔９は一般に数■φであ
る。したがりて、ｆ−）ブツシュ材に穿孔する際にドリ
ルが折れやすく、またテーノ臂リーマによって形成した
テーパ孔９の内周面の研摩は手作業であるため長時間を
要し、しかも熟練度が要求される作業である。By the way, f-) Bush 7 above has Theno! If the hole 9 is provided and its inner circumferential surface is not smooth, the resistance will be large and the fluidity of the molten resin will be inhibited, which of course will cause problems in molding. Therefore, in the past, a through hole was formed in the axial direction of a cylindrical r-top pusher made of iron material by drilling, and this through hole was sealed into a tapered hole 9 with a taper 4 reamer, and further, The inner peripheral surface of the tapered hole 9 was mirror-finished using sandpaper or a grindstone. However, the taper hole 9 is generally several inches in diameter. Therefore, f-) the drill is likely to break when drilling into the bushing material, and polishing the inner circumferential surface of the tapered hole 9 formed by the Teno arm reamer is a manual process that takes a long time and requires a high level of skill. This is a task that requires
この発明は上記事情に着目してなされたもので、その目
的とするところは、テーパ孔の機械加工、研摩作業を要
することなく簡単に製造することができるとともに、寸
法精度、平滑度の高い成形金型用ゲートブッシュを提供
しようとするものである。This invention was made in view of the above circumstances, and aims to be able to easily manufacture tapered holes without machining or polishing, and to form moldings with high dimensional accuracy and smoothness. The present invention aims to provide a gate bush for molds.
以下、この発明を図面に示す一実施例にもとづいて説明
する。第２図Ａ−Ｄは成形金型用スプルの製造順序を示
すもので、人に示す１１はマンドレルである。このマン
ドレル１ノは円柱状の真ちゅう材の基部１２を残して機
械加工により先細のチー１４１部１３を形成したもので
あり、このテーパ部１３の表面は′サンドペーノクなど
により鏡面仕上げされている。このマンドレル１１を電
極として公知の電鋳法により上記チー／４部１３の外周
にＢに示すように、ニッケルコバルト合金の有底円筒状
の電鋳層１４を形成する。チー／４部１３の外周に所定
の肉厚の電鋳層１４を形成したのち、マンドレル１ｌｔ
−挿入したまま切削加工機のチャックに上記マンドレル
１１の基部１２をチャッキングし、電鋳層１４を所定の
外径に切削してゲートブッシュ本体１５を形成する。つ
ぎに、ゲートブツシュ本体１５からｉンドレル１ノを抜
去（離型）するとＣに示すように、チー２部１３に対応
するテーノ々孔１６が形成される。このテーノ臂孔１６
の内周面はマンドレル１１のテーノ’！？部１３の表面
が予め鏡面仕上げされているため鏡面となり、研摩加工
が不要である。このようにして得られたゲートプツシ、
本体１５の先端部の外壁に一対の係止穴１７．１１を穿
設し、とのゲートプツシ一本体１５ｔ−予め裏作された
鍔付外筒体１８に圧入する。この鍔付外筒体１８は鉄材
であり、その先端部の外壁には上記係止穴１７／、１７
に対応するピ寥ン孔１９．１９が穿設されている。The present invention will be described below based on an embodiment shown in the drawings. FIGS. 2A to 2D show the manufacturing order of a sprue for a molding die, and the reference numeral 11 indicates a mandrel. This mandrel 1 has a tapered chi 141 portion 13 formed by machining, leaving a base 12 made of cylindrical brass material, and the surface of this taper portion 13 is mirror-finished using sandpaper or the like. Using this mandrel 11 as an electrode, a bottomed cylindrical electroformed layer 14 of nickel cobalt alloy is formed on the outer periphery of the chi/4 portion 13 as shown in B by a known electroforming method. After forming an electroformed layer 14 of a predetermined thickness on the outer periphery of the Chi/4 part 13, a mandrel 1lt
- While inserted, the base 12 of the mandrel 11 is chucked in the chuck of a cutting machine, and the electroformed layer 14 is cut to a predetermined outer diameter to form the gate bush main body 15. Next, when the in-drel 1 is removed (released) from the gate bush main body 15, as shown in C, the in-drel holes 16 corresponding to the chi 2 portions 13 are formed. This Teno armhole 16
The inner circumferential surface of the mandrel 11 is Teno'! ? Since the surface of the portion 13 has been mirror-finished in advance, it becomes a mirror surface and does not require polishing. Gate push obtained in this way,
A pair of locking holes 17 and 11 are bored in the outer wall of the tip of the main body 15, and the gate pusher is press-fitted into the flanged outer cylinder 18 prepared in advance. This flanged outer cylinder body 18 is made of iron material, and the locking holes 17/, 17 are provided in the outer wall at the tip thereof.
A corresponding pin hole 19.19 is drilled.
したがって、Ｄに示すように、鍔付外筒体１８にゲート
ブッシュ本体１５を圧入したのちピン孔１９．１９にピ
ン２０．２０を挿入し、その先端を係止穴７７ 、 ｘ
７に係止することにより抜は止めされる。このため、
ｆｆ−）ブツシュ本体１５と鍔付外筒体１８とは一体と
なり、最終的に電鋳層１４の底部に機械加工によっ℃細
径のノズル孔２１を穿設する。そして、従来と同様に成
形金型に組み込むことができる。Therefore, as shown in D, after the gate bush main body 15 is press-fitted into the flanged outer cylinder 18, the pin 20.20 is inserted into the pin hole 19.19, and its tip is inserted into the locking hole 77, x.
By locking at 7, removal is prevented. For this reason,
ff-) The bush main body 15 and the flanged outer cylindrical body 18 are integrated, and finally, a nozzle hole 21 having a small diameter is bored at the bottom of the electroformed layer 14 by machining. Then, it can be incorporated into a molding die in the same manner as before.
なお、上記一実施例においては電鋳層１４″ｌｒ：所定
の外径に切削してｙ−トプッシュ本体１５とし、これを
鍔付外筒体１８に圧入するようにし九が、ゲートブッシ
ュ本体１５に切削加工によって鍔部を形成すれば鍔付外
筒体１８は不要となり、抜は止め用の手段も不要となる
。また、上記電鋳層１４はニッケルコバルト合金である
が、ニッケルでもよい。In the above-mentioned embodiment, the electroformed layer 14''lr is cut to a predetermined outer diameter to form the Y-tush main body 15, which is press-fitted into the flanged outer cylinder 18. If the flange is formed by cutting, the flange outer cylinder 18 becomes unnecessary, and a means for preventing removal is also unnecessary.Furthermore, although the electroformed layer 14 is made of a nickel-cobalt alloy, it may be made of nickel.
この発明は以上説明したように、マンドレルのチー／４
’部に電鋳法によって電鋳層からなるｒ−′トプッシ一
本体を形成し、このｙ−トプッシュ本体からマンドレル
を離型してテーノ々孔を形成することにより、従来のよ
うなドリルによる穿孔作業ζチー・や孔の研摩加工が不
要となり、しかも電鋳法により従来の機械加工では得ら
れなかった平滑なテーノ譬孔を得ることができる。As explained above, this invention is based on the mandrel Qi/4
By forming an r-' top pusher body made of an electroformed layer by electroforming on the ``Y-top push body'' and forming teno holes by releasing the mandrel from this Y-top push body, drilling with a conventional drill is not possible. There is no need for grinding of the workpiece or holes, and the electroforming method can provide smooth holes that cannot be obtained with conventional machining.
しＩたが）って、ゲートブッシュの製作に熟練度が要求
されず、コストダウンを図ることができる。However, no skill is required to manufacture the gate bush, and costs can be reduced.
さらＫ、上記の製法で得られたダートプツシ−を成形金
型の２ンナとキャピテイとの間に組込んで成形加工を行
なった場合、そのテーパ孔の内周面が平滑面であるため
に樹脂流動性が極めてスムーズと表り、１台の成形金型
に複数のキ ゛ヤビティを設けて同一成形品を同時に
成形する場合に圧力が均一となり、バラツキのない品質
の高い成形品を得ることができる。さらに、テーパ孔が
平滑面であることによって、［ゲート部における樹脂の
引掛りがなく、離型性が向上し、成形サイクルアップが
図れるために成形作業が従来のほぼ５０％アッグとなる
という効果もある。Moreover, when the dart pouch obtained by the above manufacturing method is assembled between the 2nd hole of the mold and the capity and molded, the inner peripheral surface of the tapered hole is a smooth surface, so the resin The fluidity appears to be extremely smooth, and when multiple cavities are installed in one molding die to mold the same molded product at the same time, the pressure becomes uniform, making it possible to obtain uniformly high-quality molded products. can. Furthermore, since the tapered hole has a smooth surface, the resin does not get caught at the gate, improves mold releasability, and increases the molding cycle, reducing molding work by approximately 50% compared to conventional methods. There is also.
第１図は従来の成形金型を示す縦断正面図、第２図Ａ−
Ｄはこの発明の一実施例を示す説明図である。
１１・０．マンドレル、１３・・・チー７４部、１４・
・・電鋳層、１５・・・ｆ−）ブツシュ本体、１６・・
・テーパ孔。
−出願人代理人 弁理士 鈴 江 武 彦第１図
第２図Figure 1 is a longitudinal sectional front view showing a conventional molding die, Figure 2 A-
D is an explanatory diagram showing an embodiment of the present invention. 11.0. Mandrel, 13...Chi 74 part, 14...
...Electroformed layer, 15...f-) Bushing body, 16...
・Tapered hole. - Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2
Claims (1)
ルの上記テーパ部に電鋳法によって電鋳層からなるゲー
トブッシュ本体を形成し、このゲートブッシュ本体を上
記マンドレルから離型し、ゲートブッシュ本体に内周面
が平滑なテーパ孔を形成したことを特徴とする成形金型
用ゲートブッシュ。A gate bush main body made of an electroformed layer is formed by electroforming on the taper part of a mandrel having a tapered part with a smooth surface finish, and this gate bush main body is released from the mandrel to form a gate bush main body. A gate bush for a molding die characterized by a tapered hole with a smooth inner circumferential surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7555985A JPS61233515A (en) | 1985-04-10 | 1985-04-10 | Gate bush for mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7555985A JPS61233515A (en) | 1985-04-10 | 1985-04-10 | Gate bush for mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61233515A true JPS61233515A (en) | 1986-10-17 |
| JPH0521723B2 JPH0521723B2 (en) | 1993-03-25 |
Family
ID=13579654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7555985A Granted JPS61233515A (en) | 1985-04-10 | 1985-04-10 | Gate bush for mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61233515A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007239795A (en) * | 2006-03-06 | 2007-09-20 | Ntn Corp | Sliding bearing |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59230732A (en) * | 1983-06-13 | 1984-12-25 | Y S Giken Kk | Formation of sprue for molding die |
-
1985
- 1985-04-10 JP JP7555985A patent/JPS61233515A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59230732A (en) * | 1983-06-13 | 1984-12-25 | Y S Giken Kk | Formation of sprue for molding die |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007239795A (en) * | 2006-03-06 | 2007-09-20 | Ntn Corp | Sliding bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0521723B2 (en) | 1993-03-25 |
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