JPS61263719A - Injection molder - Google Patents
Injection molderInfo
- Publication number
- JPS61263719A JPS61263719A JP10619685A JP10619685A JPS61263719A JP S61263719 A JPS61263719 A JP S61263719A JP 10619685 A JP10619685 A JP 10619685A JP 10619685 A JP10619685 A JP 10619685A JP S61263719 A JPS61263719 A JP S61263719A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- sealing member
- mold
- injection molding
- heat
- 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
- 238000002347 injection Methods 0.000 title description 2
- 239000007924 injection Substances 0.000 title description 2
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims abstract description 5
- 239000004809 Teflon Substances 0.000 claims abstract description 3
- 229920006362 Teflon® Polymers 0.000 claims abstract description 3
- 239000000919 ceramic Substances 0.000 claims abstract description 3
- 229920001721 polyimide Polymers 0.000 claims abstract description 3
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 3
- 239000004945 silicone rubber Substances 0.000 claims abstract description 3
- 238000001746 injection moulding Methods 0.000 claims description 15
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 239000009719 polyimide resin Substances 0.000 claims description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims 1
- 239000013013 elastic material Substances 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 239000004642 Polyimide Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 4
- 229920005992 thermoplastic resin Polymers 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000002184 metal 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
- B29C45/20—Injection nozzles
-
- 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
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】
良東上塁五里方１
本発明は射出成形機に係り、特に金型内を真空として成
形する成形機の射出ノズルと金型との接合部を改善した
射出成形機に関する。[Detailed Description of the Invention] Ryoto Kamidori Gorikata 1 The present invention relates to an injection molding machine, and in particular, an injection molding machine that improves the joint between the injection nozzle and the mold of a molding machine that performs molding with a vacuum inside the mold. Regarding.
の 術・ 景ならびにその１
一般に、熱可塑性樹脂を材料とする射出成形機は、第３
図に略示されているように、スクリューインライン方式
のものが多く用いられている。Techniques and Views and Part 1 In general, injection molding machines that use thermoplastic resin as materials are
As schematically shown in the figure, a screw in-line type is often used.
このスクリューインライン方式の射出成形機は、シリン
ダ１内にスクリュー２が内挿され、このシリンダ１の周
囲に加熱装置３が配設されていて、シリンダ１の後方部
に設けられたホッパ４から供給される熱可塑性樹脂材料
５をスクリュー２の回転により給送する間に溶融させ、
スクリュー２の前進によりその先端のノズル部６を通じ
て金型７内に溶融樹脂を圧入することにより成形が行な
われるようになっている。This screw in-line injection molding machine has a screw 2 inserted into a cylinder 1, a heating device 3 disposed around the cylinder 1, and a hopper 4 provided at the rear of the cylinder 1. The thermoplastic resin material 5 is melted while being fed by the rotation of the screw 2,
Molding is carried out by press-fitting the molten resin into the mold 7 through the nozzle portion 6 at the tip of the screw 2 as it moves forward.
ところで上記の射出成形機においては、金型７内に空気
が存在したり、シリンダ１内の空気が金型７内に入ると
、この空気が成形時に封入されて成形品の外観を損なう
ことになる。By the way, in the above injection molding machine, if air exists in the mold 7 or if air in the cylinder 1 enters the mold 7, this air will be trapped during molding and will damage the appearance of the molded product. Become.
上記のような空気による成形品の横形を防止するため、
従来からエアベント方式を用いて空気を排除するように
しているが、この方式では完全に空気を排出することが
できない。In order to prevent the molded product from becoming horizontal due to air as described above,
Conventionally, an air vent method has been used to remove air, but this method cannot completely remove the air.
一方、ノズル部６と金型７のノズル当接部８とは第４図
示のように金属同士の接合であるため核部の密封性が不
十分であり、さりとてゴムのような弾性体をシール材と
して用いるには、ノズル部６が熱可塑性樹脂を溶融する
ために２００〜２６０℃に熱せられていることから不適
である。On the other hand, since the nozzle part 6 and the nozzle abutting part 8 of the mold 7 are metal-to-metal joints as shown in Figure 4, the sealing performance of the core part is insufficient, and it is difficult to seal an elastic body such as rubber. It is unsuitable for use as a material because the nozzle part 6 is heated to 200 to 260°C to melt the thermoplastic resin.
■服五亘迎
本発明は、ノズル部と金型との接合部の密封性を飛躍的
に向上させ、金型内への空気の侵入を完全に防止して金
型内を真空状態に保ち、成形品の外観が損なわれること
を防止することができるようにした射出成形機を提供す
ることを目的とするものである。■The present invention dramatically improves the sealing performance of the joint between the nozzle and the mold, completely preventing air from entering the mold and maintaining a vacuum inside the mold. An object of the present invention is to provide an injection molding machine that can prevent the appearance of a molded product from being damaged.
及皿五旦１
上記目的を達成するため本発明においては、溶融樹脂を
射出するノズル部と金型のノズル当接部との間に耐熱性
を有するシール部材を設けたことを特徴とするものであ
る。In order to achieve the above object, the present invention is characterized in that a heat-resistant sealing member is provided between the nozzle part for injecting molten resin and the nozzle contact part of the mold. It is.
及里二叉厘ヨ
以下本発明の実施例を第１図および第２図により、第３
図と共通する部分には同一符号を付して説明する。Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.
Parts common to those in the drawings will be described with the same reference numerals.
第１図に一例を示すように、金型７は固定側金型７Ａと
移動側金型７Ｂとで構成されており、固定側金型７Ａの
ノズル当接部８にノズル部６が密接されるようになって
いる。As an example is shown in FIG. 1, the mold 7 is composed of a fixed mold 7A and a movable mold 7B, and the nozzle part 6 is brought into close contact with the nozzle contact part 8 of the fixed mold 7A. It has become so.
ノズル当接部８の内周部には環状のシール部材９が嵌着
され、ノズル部６の外周部には前記シール部材９の内周
に可及的密に嵌入し得る外径を有する円筒状のシール部
材１０が嵌着されており、ノズル部６がノズル当接部９
の内周に密着して摺接することにより両者間が密封され
るようになっている。An annular seal member 9 is fitted into the inner periphery of the nozzle contact portion 8, and a cylindrical seal member 9 having an outer diameter that can fit into the inner periphery of the seal member 9 as closely as possible is fitted to the outer periphery of the nozzle portion 6. A sealing member 10 having a shape of
The space between the two is sealed by making close contact and sliding contact with the inner periphery of the two.
前記ノズル当接部８のシール部材９は、テフロン、フッ
ソゴム、シリコンゴム等の弾性に富む材料で構成され、
ノズル部６のシール部材１０は、耐熱性を有するポリイ
ミド樹脂、耐熱ガラス、セラミック等の比較的硬質で熱
伝導率の低い材料で構成されており、ノズル部６の熱が
ノズル当接部８のシール部材９に直接伝熱することを防
ぐ役目を兼務している。The sealing member 9 of the nozzle contact portion 8 is made of a highly elastic material such as Teflon, fluorine rubber, silicone rubber, etc.
The sealing member 10 of the nozzle part 6 is made of a material that is relatively hard and has low thermal conductivity, such as heat-resistant polyimide resin, heat-resistant glass, and ceramic. It also serves to prevent heat from being directly transferred to the seal member 9.
固定側金型７Ａと移動側金型７Ｂとの摺動部１１、およ
び移動側金型７Ｂとノックピン１２との摺動部１３には
それぞれシール部材１４．１５が介在され、型締め直前
に型内間隔ｐの状態で吸引孔１６を通じバキュームポン
プにより金型７内の空気を吸引して真空状態とし、つい
で型締めしたのち空気の吸込みがないようにされている
。なお、型締め前におけるノズル部６の先端と金型７と
の空間は、Ｏ〜δｌＩＩ／ＩＩＩの状態におかれる。Seal members 14 and 15 are interposed in the sliding parts 11 between the stationary mold 7A and the movable mold 7B, and the sliding parts 13 between the movable mold 7B and the knock pin 12, respectively. Air inside the mold 7 is suctioned by a vacuum pump through the suction hole 16 with the inner distance p to create a vacuum state, and then the mold is clamped to prevent air from being sucked in. Note that the space between the tip of the nozzle portion 6 and the mold 7 before mold clamping is set in a state of O to δlII/III.
したがって、射出成形時にノズル部６が金型７のノズル
当接部８に嵌合するとき、ノズル部６のシール部材１０
の外周面がノズル当接部８の内周面に密接して金型７の
内部が密封され、金型７内の空気を吸引孔１６を通じて
吸引し、真空としたとき真空度が減退することがなく、
またシリンダ１内の空気を吸込むこともない。これによ
り、金型７内に溶融樹脂を射出しても、空気が金型７内
に封入されることがないので、成形品が空気圧によって
横形されることが完全に防止される。Therefore, when the nozzle part 6 fits into the nozzle contact part 8 of the mold 7 during injection molding, the sealing member 10 of the nozzle part 6
The outer circumferential surface of the nozzle contact portion 8 is in close contact with the inner circumferential surface of the nozzle contact portion 8 to seal the inside of the mold 7, and when the air inside the mold 7 is sucked through the suction hole 16 to create a vacuum, the degree of vacuum decreases. There is no
Moreover, the air inside the cylinder 1 is not sucked. As a result, even if the molten resin is injected into the mold 7, air is not enclosed in the mold 7, so that the molded product is completely prevented from being shaped horizontally by air pressure.
及亘五皇呈
以上説明したように、本発明によれば、金型内の空気を
吸引排除しても、ノズル部とノズル当接部とはシール部
材の密接によって封止されるので、ノズル部とノズル当
接部との接合部からの空気の吸引がなく、そのため真空
状態下での射出成形ができ、金型内に封入される空気に
より成形品の外観が損なわれることが完全に防止される
。As explained above, according to the present invention, even if the air inside the mold is removed by suction, the nozzle part and the nozzle contact part are sealed by the sealing member, so the nozzle There is no suction of air from the joint between the part and the nozzle contact part, so injection molding can be performed under vacuum conditions, completely preventing the appearance of the molded product from being damaged by the air sealed in the mold. be done.
第１図は本発明の一実施例を示す断面図、第２図は同一
部材の拡大断面図、第３図は従来の射出成形機の全体構
成を示す略示断面図、第４図は従来のノズル部とノズル
当接部との拡大断面図である。
１・・・シリンダ、２・・・スクリュー、３・・・加熱
装置、４・・・ホッパ、５・・・熱可塑性樹脂、６・・
・ノズル部、７・・・金型、７Ａ・・・固定側金型、７
Ｂ・・・移動側金型、８・・・ノズル当接部、９．１０
，１４，１５・・・シール部材。
特許出願人 日本メクトロン株式会社代理人 弁理士
吉 １） 俊 夫
第 １ 図
第 ２ 図Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the same member, Fig. 3 is a schematic sectional view showing the overall configuration of a conventional injection molding machine, and Fig. 4 is a conventional injection molding machine. FIG. 3 is an enlarged cross-sectional view of a nozzle portion and a nozzle contact portion. 1... Cylinder, 2... Screw, 3... Heating device, 4... Hopper, 5... Thermoplastic resin, 6...
・Nozzle part, 7...Mold, 7A...Fixed side mold, 7
B...Moving side mold, 8...Nozzle contact part, 9.10
, 14, 15... Seal member. Patent applicant Nippon Mectron Co., Ltd. Agent Patent attorney Yoshi 1) Toshio Figure 1 Figure 2
Claims (3)
部との間に耐熱性を有するシール部材を設けたことを特
徴とする射出成形機。(1) An injection molding machine characterized in that a heat-resistant sealing member is provided between a nozzle portion for injecting molten resin and a nozzle contact portion of a mold.
に嵌着されたリング状のシール部材と、ノズル部の外周
部に嵌着された前記ノズル当接部のシール部材に摺接す
る筒状のシール部材とで構成したことを特徴とする特許
請求の範囲第１項に記載の射出成形機。(2) The sealing member includes a ring-shaped sealing member fitted to the inner periphery of the nozzle abutting part of the mold, and a sealing member of the nozzle abutting part fitted to the outer periphery of the nozzle part. The injection molding machine according to claim 1, further comprising a cylindrical seal member that slides into contact with the injection molding machine.
、シリコンゴム等から選択された材料で構成し、ノズル
部側のシール部材は、耐熱性を有するポリイミド樹脂、
耐熱ガラス、セラミック等から選択された材料で構成し
たことを特徴とする特許請求の範囲第２項に記載の射出
成形機。(3) The sealing member on the mold side is made of a material selected from Teflon, fluorocarbon rubber, silicone rubber, etc., and the sealing member on the nozzle side is made of heat-resistant polyimide resin,
The injection molding machine according to claim 2, wherein the injection molding machine is made of a material selected from heat-resistant glass, ceramic, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10619685A JPS61263719A (en) | 1985-05-20 | 1985-05-20 | Injection molder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10619685A JPS61263719A (en) | 1985-05-20 | 1985-05-20 | Injection molder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61263719A true JPS61263719A (en) | 1986-11-21 |
| JPH0154176B2 JPH0154176B2 (en) | 1989-11-17 |
Family
ID=14427420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10619685A Granted JPS61263719A (en) | 1985-05-20 | 1985-05-20 | Injection molder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61263719A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0366715U (en) * | 1989-10-31 | 1991-06-28 | ||
| JPH03126609U (en) * | 1990-03-31 | 1991-12-20 | ||
| JPH0512110U (en) * | 1991-04-04 | 1993-02-19 | 株式会社スリーボンド | Nozzle device of injection molding machine |
| US5507633A (en) * | 1991-01-17 | 1996-04-16 | Towa Corporation | Resin molding apparatus for sealing an electronic device |
| JP2010173228A (en) * | 2009-01-30 | 2010-08-12 | Canon Electronics Inc | Injection molding machine |
| JPWO2008152872A1 (en) * | 2007-06-14 | 2010-08-26 | コニカミノルタオプト株式会社 | Injection nozzle and molding machine |
| JP2011098512A (en) * | 2009-11-06 | 2011-05-19 | Japan Steel Works Ltd:The | Mold assembly for injection molding machine and injection molding machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5014761A (en) * | 1973-06-11 | 1975-02-17 | ||
| JPS57197136A (en) * | 1981-05-30 | 1982-12-03 | Yamashiro Seiki Seisakusho:Kk | Mold apparatus of injection molding machine |
-
1985
- 1985-05-20 JP JP10619685A patent/JPS61263719A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5014761A (en) * | 1973-06-11 | 1975-02-17 | ||
| JPS57197136A (en) * | 1981-05-30 | 1982-12-03 | Yamashiro Seiki Seisakusho:Kk | Mold apparatus of injection molding machine |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0366715U (en) * | 1989-10-31 | 1991-06-28 | ||
| JPH03126609U (en) * | 1990-03-31 | 1991-12-20 | ||
| US5507633A (en) * | 1991-01-17 | 1996-04-16 | Towa Corporation | Resin molding apparatus for sealing an electronic device |
| JPH0512110U (en) * | 1991-04-04 | 1993-02-19 | 株式会社スリーボンド | Nozzle device of injection molding machine |
| JPWO2008152872A1 (en) * | 2007-06-14 | 2010-08-26 | コニカミノルタオプト株式会社 | Injection nozzle and molding machine |
| JP2010173228A (en) * | 2009-01-30 | 2010-08-12 | Canon Electronics Inc | Injection molding machine |
| JP2011098512A (en) * | 2009-11-06 | 2011-05-19 | Japan Steel Works Ltd:The | Mold assembly for injection molding machine and injection molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0154176B2 (en) | 1989-11-17 |
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