JPH01135612A - Sprue bushing of molding die - Google Patents
Sprue bushing of molding dieInfo
- Publication number
- JPH01135612A JPH01135612A JP29565587A JP29565587A JPH01135612A JP H01135612 A JPH01135612 A JP H01135612A JP 29565587 A JP29565587 A JP 29565587A JP 29565587 A JP29565587 A JP 29565587A JP H01135612 A JPH01135612 A JP H01135612A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- heat insulating
- sprue bushing
- mold
- insulating space
- 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
- 238000000465 moulding Methods 0.000 title claims abstract description 21
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012778 molding 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
-
- 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
- B29C2045/2764—Limited contact between nozzle and mould
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（技術分野）
本発明は、成形機のノズルと直接接触する成形金型のス
プルーブツシュの断熱構造に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a heat insulating structure for a sprue bushing of a molding die that comes into direct contact with a nozzle of a molding machine.
（背景技術）
−ａの射出成形機は、第４図に示すように、可塑化射出
部Ａと金型部Ｂおよび型締め部Ｃからなり、この型締め
部Ｃの可動側取付板１０に連結した可動金型１１を前進
させて閉じ、次に可塑化射出部へのプランジ中（図示せ
ず）を前進させて、可塑化された樹脂をノズル１２から
成形キャビティ１３内に射出し充填した後、プランジャ
を後退させ、新しい成形材料がホッパー（図示せず）か
ら供給される。(Background Art) As shown in FIG. The connected movable mold 11 was advanced and closed, and then the plunge part (not shown) to the plasticization injection part was advanced, and the plasticized resin was injected and filled into the molding cavity 13 from the nozzle 12. Thereafter, the plunger is retracted and new molding material is supplied from a hopper (not shown).
一方、型締め部Ｃの可動側取付板１０に取り付けられた
可動金型１１を後退させ金型を開いて、冷却。On the other hand, the movable mold 11 attached to the movable side mounting plate 10 of the mold clamping part C is moved back, the mold is opened, and the mold is cooled.
固化された成形品をエジェクタビン１４で突き出され、
これを払い落として取り出すように形成されている。The solidified molded product is ejected with an ejector bin 14,
It is designed to be removed by brushing it off.
この成形キャビティ１３は、固定側取付板１５の下面に
固定された固定側型板１６と可動側型板１７との間に形
成されている。この成形キャビティ１３に連通ずる注入
孔１８を設けたスプルーブツシュ１９が固定側取付板１
５と固定側型板１６の中央を貫通する貫通孔２０に嵌合
されて、ロケートリング２１を介して固設されている。This molding cavity 13 is formed between a fixed mold plate 16 fixed to the lower surface of the fixed mounting plate 15 and a movable mold plate 17. A sprue bush 19 with an injection hole 18 communicating with the molding cavity 13 is connected to the fixed side mounting plate 1.
5 and a through hole 20 passing through the center of the stationary template 16, and are fixed via a locate ring 21.
このスプルーブツシュ１９の注入孔１８には、半球状の
富み部２２が設けられ、ノズル１２の先端部が当接した
状態でノズル１２の射出孔２２とスプルーブツシュ１９
の注入孔１８が連通されるよう構成されている。The injection hole 18 of this sprue bush 19 is provided with a hemispherical enriched part 22, and when the tip of the nozzle 12 is in contact with the injection hole 22 of the nozzle 12 and the sprue bush 19,
The injection holes 18 are configured to communicate with each other.
このような従来の成形金型のスプルーブツシュでは、可
塑化された樹脂をノズル１２がら成形キャビティ１３内
に射出１充填して金型の冷却効果によって冷却・固化さ
せる際に、加熱されたノズル１２の先端がスプルーブツ
シュＩ９の窪み部２２に接触するため、高温のノズル１
２から低温の金型に両者の接触部を通して熱移動が生じ
て、金型の冷却効率が低下されるとともに、ノズルの先
端部の温度が低下して樹脂が固化されて、ノズルめずま
りを生ずるという問題点を有している。In such conventional sprue bushings of molding molds, when plasticized resin is injected into the molding cavity 13 through the nozzle 12 and cooled and solidified by the cooling effect of the mold, the heated nozzle Since the tip of the nozzle 12 contacts the recessed part 22 of the sprue bush I9, the hot nozzle 1
Heat transfer occurs from 2 to the low-temperature mold through the contact area between the two, reducing the cooling efficiency of the mold, and the temperature at the tip of the nozzle decreases, solidifying the resin and preventing nozzle clogging. There is a problem that this occurs.
（発明の目的）
本発明は、以上のような点に層みて提案されたもので、
その目的とするところは、可塑化射出部のノズルから金
型への熱移動を抑制して、金型の冷却効率を改善すると
ともに、ノズルの先端温度の低下を防止することができ
る成形金型のスプルーブツシュを提供するにある。(Object of the invention) The present invention has been proposed by taking into consideration the points mentioned above.
The purpose of this is to suppress the heat transfer from the nozzle of the plasticizing injection part to the mold, improve the cooling efficiency of the mold, and prevent a drop in the nozzle tip temperature. The sprue bush is on offer.
すなわち、本発明に係る成形金型のスプルーブツシュは
、スプルーブツシュのノズル接触部近傍に断熱用空間部
を形成することにより、上記の目的を達成するものであ
る。That is, the sprue bushing of the molding die according to the present invention achieves the above object by forming a heat insulating space in the vicinity of the nozzle contacting part of the sprue bushing.
（発明の開示） 本発明を図に沿って説明する。(Disclosure of invention) The present invention will be explained along with the drawings.
第１１１ｉＪ（Ａ）、 （Ｂ）は本発明の一実施例を示
す図であって、図中、ｌは縦断面形状が略Ｔ字状を呈す
るスフ゛ル−フ゛ンシュ、２はノズル、３はノズル２の
先端が接触するスプルーブツシュ１の近傍に形成した断
熱用空間部である。No. 111iJ (A) and (B) are diagrams showing an embodiment of the present invention, and in the diagrams, l denotes a spherical fish whose vertical cross-sectional shape is approximately T-shaped, 2 denotes a nozzle, and 3 denotes a nozzle 2. This is a heat insulating space formed near the sprue bushing 1 with which the tip of the sprue bushing 1 comes into contact.
このスプルーブツシュ１は、その中央に成形キャビティ
１３に連通ずるラッパ状の注入孔４が穿設され、その注
入孔４の開口縁５に略半球状の窪み部６が形成されてい
る。This sprue bush 1 has a trumpet-shaped injection hole 4 in its center communicating with a molding cavity 13, and a substantially hemispherical depression 6 is formed at the opening edge 5 of the injection hole 4.
この窪み部６の球面にノズル２が接触する円周線の近傍
に断熱用空間部３、たとえば４個の穴３ａが円周線に沿
って９０°等間隔に穿設されている。In the vicinity of the circumferential line where the nozzle 2 contacts the spherical surface of the recessed part 6, a heat insulating space 3, for example, four holes 3a, are bored at equal intervals of 90 degrees along the circumferential line.
このように構成してなるスプルーブツシュｌにおいては
、ノズル２とスブル−フ゛ンシェ１との間に空気層が形
成され、断熱効果および熱伝導面積を縮少させることが
できる。したがって、この断熱用空間部３は、高温のノ
ズル２から金型への熱移動を抑制して金型への流入熱量
を少なくすることができ、金型の冷却効率を改善するこ
とができる。In the sprue bush 1 constructed in this manner, an air layer is formed between the nozzle 2 and the sprue bush 1, thereby achieving a heat insulating effect and reducing the heat conduction area. Therefore, the heat insulating space 3 can suppress heat transfer from the high temperature nozzle 2 to the mold, reduce the amount of heat flowing into the mold, and improve cooling efficiency of the mold.
第２図（＾）、（Ｂ）は、本発明の他の実施例を示すも
ので、断熱用空間部３を溝状に連通ずるよう形成した例
である。FIGS. 2(^) and 2(B) show another embodiment of the present invention, in which the heat insulating space 3 is formed so as to communicate in the form of a groove.
この実施例において断熱用空間部３は、第２図（Ａ）に
示すように、スプルーブツシュｌの窪み部６のノズル接
触部近傍に環状の溝部３ｂを周設して形成されている。In this embodiment, the heat insulating space 3 is formed by surrounding an annular groove 3b near the nozzle contacting part of the recess 6 of the sprue bush 1, as shown in FIG. 2(A).
この溝部３ｂ内にある空気は、ノズル２からの熱伝導に
より、自然対流が生じてノズル接触部からの流入熱量の
一部を外部に放出することができる。Natural convection occurs in the air in the groove 3b due to heat conduction from the nozzle 2, and a part of the amount of heat flowing from the nozzle contact portion can be released to the outside.
高温のノズル２から金型への流入熱量を更に減少させる
ことが可能となり、金型の冷却効率をより改善すること
ができる。It becomes possible to further reduce the amount of heat flowing into the mold from the high-temperature nozzle 2, and the cooling efficiency of the mold can be further improved.
第３図（Ａ） 、 （Ｂ）は、さらに本発明の他の実施
例を示すもので、スプルーブツシュ１の注入口縁に環状
段部７を形成し、この環状段部７に一部切り欠きのリン
グ部材８を着脱自在に設けて断熱用空間部３を形成した
例を示したものである。3(A) and 3(B) show still another embodiment of the present invention, in which an annular step 7 is formed on the injection port edge of the sprue bush 1, and a part of the annular step 7 is formed. This shows an example in which a notched ring member 8 is detachably provided to form a heat insulating space 3.
このリング部材８は、中央にスプルーブツシュｌの注入
孔５に連通ずる貫通孔９が穿設された円筒部８ａと、こ
の円筒部８ａの上端外方に４つの突出片８ｂを突出させ
てなり、この突出片８ｂの端面が環状段部８の内周面に
当接するよう形成されている。This ring member 8 includes a cylindrical portion 8a having a through hole 9 bored in the center that communicates with the injection hole 5 of the sprue bush l, and four protruding pieces 8b protruding outward from the upper end of this cylindrical portion 8a. The end face of this protruding piece 8b is formed to abut against the inner circumferential surface of the annular step portion 8.
このリング部材８をスプルーブツシュ１の環状段部７に
嵌合すれば、このリング部材８と環状段部７との間に断
熱用空間部３が形成される。When this ring member 8 is fitted into the annular step 7 of the sprue bushing 1, a heat insulating space 3 is formed between the ring member 8 and the annular step 7.
このように構成されたスプルーブツシュ１では、ノズル
２との接触面積が減少するとともに、リング部材８の４
ケ所が外部に開放されているのでノズルからの熱を自然
対流により外部へ放出させることができ、ノズル２から
金型への流入熱量を抑制させて、更に金型の冷却効率を
改善することができる。In the sprue bush 1 configured in this way, the contact area with the nozzle 2 is reduced, and the 4th part of the ring member 8 is
Since these parts are open to the outside, the heat from the nozzle can be released to the outside by natural convection, and the amount of heat flowing into the mold from the nozzle 2 can be suppressed, further improving the cooling efficiency of the mold. can.
さらに、このリング部材８はスプルーブツシュ１に着脱
自在に設けられているので、成形の繰り返し回数に応じ
て適宜に交換することができスプルーブツシュの寿命を
延ばすことができる。Furthermore, since the ring member 8 is detachably attached to the sprue bushing 1, it can be replaced as appropriate depending on the number of repetitions of molding, thereby extending the life of the sprue bushing.
（発明の効果）
以上のように、本発明に係る成形金型のスプルーブツシ
ュによれば、スプルーブツシュのノズル接触部近傍に断
熱用空間部を形成するよう構成したので、次のような特
存な効果を有する。(Effects of the Invention) As described above, according to the sprue bushing of the molding die according to the present invention, the heat insulating space is formed in the vicinity of the nozzle contact portion of the sprue bushing, so that the following effects can be achieved. It has a unique effect.
（１） 成形キャビティの冷却効果が良くなり、成形
の生産効率を上昇させることができる。(1) The cooling effect of the molding cavity is improved, and the production efficiency of molding can be increased.
（２）ノズル先端部の放熱を少なくすることができるの
で、ノズル先端において温度降下による樹脂の固化を防
止することができる。(2) Since the heat dissipation at the nozzle tip can be reduced, it is possible to prevent the resin from solidifying at the nozzle tip due to temperature drop.
（３）固定側および可動側の金型における冷却効果を均
一にすることができるので、成形キャビティに対する不
均一冷却を防いで成形品の品質を高めることができる。(3) Since the cooling effect on the fixed and movable molds can be made uniform, uneven cooling of the molding cavity can be prevented and the quality of the molded product can be improved.
（４） さらに、断熱用空間部を着脱自在なリング部
材で形成することができるので、スプルーブツシュの寿
命を延ばすことが可能となる。(4) Furthermore, since the heat insulating space can be formed by a detachable ring member, the life of the sprue bushing can be extended.
第１図（＾）、（Ｂ）は本発明の一実施例を示す図であ
って、（Ａ）図は平面図及び（Ｂ）図は継断面図、第２
図（Ａ） 、 （Ｂ）および第３図（Ａ） 、 （Ｂ）
は本発明の他の実施例を示す図であって、（Ａ）図は平
面図および（Ｂ）図は縦断面図である。第４図は一般の
射出成形機の一例を示す全体継断面図である。
１・・・スプル−ブツシユ、２・・・ノズル、３・・・
断熱用空間部。
第１図
第２図
第３図
第４図FIGS. 1(^) and 1(B) are views showing one embodiment of the present invention, in which FIG. 1(A) is a plan view, FIG. 1(B) is a joint sectional view, and FIG.
Figures (A), (B) and Figure 3 (A), (B)
2A and 2B are diagrams showing other embodiments of the present invention, in which (A) is a plan view and (B) is a longitudinal cross-sectional view. FIG. 4 is an overall joint sectional view showing an example of a general injection molding machine. 1... Sprue-button, 2... Nozzle, 3...
Space for insulation. Figure 1 Figure 2 Figure 3 Figure 4
Claims (3)
間部を形成することを特徴とする成形金型のスプルーブ
ッシュ。(1) A sprue bush for a molding die, characterized in that a heat insulating space is formed near a nozzle contact portion of the sprue bush.
部は溝状に連通する空間を形成してなる成形金型のスプ
ルーブッシュ。(2) A sprue bush for a molding die according to claim 1, wherein the heat insulating space forms a space communicating in a groove shape.
部はスプルーブッシュの注入口に環状段部を形成し、こ
の環状段部に一部切り欠きのリング部材を着脱自在に設
けてなる成形金型のスプルーブッシュ。(3) In claim 1, the heat insulating space is formed by forming an annular step at the injection port of the sprue bushing, and a ring member with a partially cutout is detachably provided in the annular step. Sprue bushing for molding mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62295655A JPH0720647B2 (en) | 1987-11-24 | 1987-11-24 | Mold sprue bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62295655A JPH0720647B2 (en) | 1987-11-24 | 1987-11-24 | Mold sprue bushing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01135612A true JPH01135612A (en) | 1989-05-29 |
| JPH0720647B2 JPH0720647B2 (en) | 1995-03-08 |
Family
ID=17823454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62295655A Expired - Lifetime JPH0720647B2 (en) | 1987-11-24 | 1987-11-24 | Mold sprue bushing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0720647B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100760588B1 (en) * | 2000-04-21 | 2007-10-04 | 도아고세이가부시키가이샤 | Process for producing water-soluble polymer |
| US8127538B2 (en) | 2008-03-21 | 2012-03-06 | Ford Global Technologies, Llc | Liquid injector assembly with a flanged connector connection |
| JP2013146935A (en) * | 2012-01-20 | 2013-08-01 | Loyal Engineering Kk | Bush for injection molding |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0213715D0 (en) | 2002-06-14 | 2002-07-24 | Syngenta Ltd | Chemical compounds |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5912621U (en) * | 1982-07-19 | 1984-01-26 | エヌオーケー株式会社 | injection mold |
| JPS5981151A (en) * | 1982-10-31 | 1984-05-10 | Matsushita Electric Works Ltd | Construction of metallic mold |
| JPS61127323A (en) * | 1984-11-27 | 1986-06-14 | Hitachi Ltd | Mold assembly for injection compression molding |
| JPS61145618U (en) * | 1985-03-01 | 1986-09-08 |
-
1987
- 1987-11-24 JP JP62295655A patent/JPH0720647B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5912621U (en) * | 1982-07-19 | 1984-01-26 | エヌオーケー株式会社 | injection mold |
| JPS5981151A (en) * | 1982-10-31 | 1984-05-10 | Matsushita Electric Works Ltd | Construction of metallic mold |
| JPS61127323A (en) * | 1984-11-27 | 1986-06-14 | Hitachi Ltd | Mold assembly for injection compression molding |
| JPS61145618U (en) * | 1985-03-01 | 1986-09-08 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100760588B1 (en) * | 2000-04-21 | 2007-10-04 | 도아고세이가부시키가이샤 | Process for producing water-soluble polymer |
| US8127538B2 (en) | 2008-03-21 | 2012-03-06 | Ford Global Technologies, Llc | Liquid injector assembly with a flanged connector connection |
| US8191356B2 (en) | 2008-03-21 | 2012-06-05 | Ford Global Technologies, Llc | Liquid injector assembly with a flanged connector connection |
| US8695327B2 (en) | 2008-03-21 | 2014-04-15 | Ford Global Technologies, Llc | Liquid injector assembly with a flanged connector connection |
| JP2013146935A (en) * | 2012-01-20 | 2013-08-01 | Loyal Engineering Kk | Bush for injection molding |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0720647B2 (en) | 1995-03-08 |
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