JPH01182016A - Plastic injection molding method - Google Patents
Plastic injection molding methodInfo
- Publication number
- JPH01182016A JPH01182016A JP735588A JP735588A JPH01182016A JP H01182016 A JPH01182016 A JP H01182016A JP 735588 A JP735588 A JP 735588A JP 735588 A JP735588 A JP 735588A JP H01182016 A JPH01182016 A JP H01182016A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- vibration
- cavity
- micro
- injection molding
- 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
- 238000001746 injection moulding Methods 0.000 title claims description 17
- 239000000463 material Substances 0.000 claims abstract description 39
- 238000000465 moulding Methods 0.000 claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 3
- 239000000155 melt Substances 0.000 abstract description 2
- 239000006260 foam Substances 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 230000020169 heat generation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000000243 solution 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/568—Applying vibrations to the mould parts
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、プラスチック射出成形方法において、その金
型を適宜手段で高速微振動若しくは超音波振動せしめた
状態で、金型のキャビティ中に溶融樹脂材料（以下単に
材料と記す）を射出充填して、プラスチック製品の成形
を行うようにしことを特徴とする、プラスチック射出成
形方法に係り、
もって、超精密射出成形加工を実現し、併わせで、成形
品の離型性能を著しく向上することを企図したものであ
る。Detailed Description of the Invention ■)...Industrial Field of Application The present invention relates to a plastic injection molding method in which the cavity of the mold is subjected to high-speed microvibration or ultrasonic vibration by an appropriate means. This invention relates to a plastic injection molding method characterized by injecting and filling a molten resin material (hereinafter simply referred to as material) into a plastic product to mold a plastic product, thereby realizing ultra-precision injection molding processing, Together, they are intended to significantly improve the mold release performance of molded products.
■）・・・従来技術の課題
現在−船釣に行われているプラスチック射出成形方法に
よると、下記のような課題、欠点があった。■)...Problems with the prior art - According to the plastic injection molding method currently used for boat fishing, there are the following problems and drawbacks.
（１）・・・材料が射出成形機のノズルを出て、金型の
スプル、ランナ、ゲートを経てキャビティに射出充填さ
れて成形されるとき、
材料は金型内の流動をよくし成形性を高めるため、成る
高さの温度（溶融状態温度）が必要であるが、一方、該
材料温度が金型に伝導して金型が加熱されると、材料の
冷却硬化、即ち成形完了が遅れるため、冷却水を循環す
るなどして金型の温度調整を行っている。という、矛盾
した状態で行われている。(1) When the material exits the nozzle of the injection molding machine, passes through the sprue, runner, and gate of the mold, and is injected and filled into the cavity for molding, the material flows well within the mold and improves moldability. In order to increase the material temperature, a high temperature (molten state temperature) is required. However, if the material temperature is conducted to the mold and the mold is heated, cooling hardening of the material, that is, completion of molding will be delayed. Therefore, the temperature of the mold is adjusted by circulating cooling water. This is happening in a contradictory state.
然るところ、上記金型と材料との温度差のために、流入
した材料と金型との接触面がまっ先に硬化して、所謂ス
キン層が形成されるために、材料の流動が阻害される、
材料が金型の微細形状部分や微細径孔部分等に充分精密
に入らない（流れない）等の欠点が生じ、為に精密成形
ができ難いという問題点力であった。However, due to the temperature difference between the mold and the material, the contact surface between the inflowing material and the mold hardens first, forming a so-called skin layer, which impedes the flow of the material. ,
The problem was that the material did not enter (flow) accurately into the finely shaped parts and the finely sized holes of the mold, making it difficult to perform precision molding.
（２）・・・上記、欠点からして、例えば、超精密成形
が要求されるコンパクトディスク （ＣＤ）などは、従
来通常の射出成形法では製造不可能とされ、特殊で極め
て高価なプレス成形機によっており、膨大数の需要が見
込まれるプラスチック製品であり乍ら、射出成形法では
対応し得ない難点があった。(2) Considering the drawbacks mentioned above, for example, compact discs (CDs), which require ultra-precision molding, have traditionally been considered impossible to manufacture using normal injection molding methods, and require special and extremely expensive press molding. Although it is a plastic product that is expected to be in huge demand, it has some drawbacks that injection molding cannot handle.
（３）・・・また、成形品の離型性能の向上が常に課題
とされており、特に、非常に小型なためとか形状が特殊
なため等の理由で、エジェクタービンを付けられないと
かノックアウト位置が無いものなどの成形加工時に、特
に課題とされ、その解決が強く望まれてきたものである
。(3)...In addition, improving the mold release performance of molded products is always an issue, especially when it is impossible to attach an ejector turbine or knockout due to extremely small size or special shape. This is particularly a problem when molding items that do not have a position, and a solution to this problem has been strongly desired.
■）・・・本発明方法
本発明は、超精密成形が可能で、離型性能を著しく向上
した、プラスチック射出成形方法に係り、もって、上記
従来の課題を有効に解決せんとするものである。■) Method of the present invention The present invention relates to a plastic injection molding method that enables ultra-precision molding and has significantly improved mold release performance, thereby effectively solving the above-mentioned conventional problems. .
（１）・・・即ち、本発明は、溶融樹脂材料を金型のキ
ャビティ中に射出充填して成形を行うプラスチック射出
成形法において、
金型を、適宜手段で、高速微振動若しくは超音波振動せ
しめた状態で、溶融樹脂材料をキャビティ中に射出充填
して、プラスチック製品の成形を行うようにしたことを
特徴とする、プラスチック射出成形方法である。(1)...That is, the present invention provides a plastic injection molding method in which molten resin material is injected into a mold cavity and molded, and the mold is subjected to high-speed microvibration or ultrasonic vibration by appropriate means. This is a plastic injection molding method characterized in that a plastic product is molded by injecting and filling a molten resin material into a cavity in a compressed state.
（２）・・・また、本発明は射出成形機の金型の全部若
しくは一部、例えばキャビティ周辺部分等（例、入れ子
−カセット等）を、適宜の高速微振動発生装置（電気、
空気等による）若しくは超音波発生装置で、高速微振動
若しくは超音波振動せしめた状態で、材料をキャビティ
中に射出充填して、プラスチック製品の成形を行うよう
にしたものである。(2)...Furthermore, the present invention provides an appropriate high-speed micro-vibration generator (electrical,
Plastic products are molded by injecting and filling the material into a cavity while generating high-speed micro-vibration or ultrasonic vibration using air, etc.) or an ultrasonic generator.
（３）更に本発明は、金型の全部若しくは一部を、成形
加工中連続して、または、射出充填時、離型時等に断続
して、高速微振動若しくは超音波振動せしめた状態で、
材料をキャビティ中に射出充填して、プラスチック製品
の成形を行うようにしたものである。(3) Furthermore, the present invention provides a method in which all or part of the mold is subjected to high-speed microvibration or ultrasonic vibration continuously during the molding process or intermittently during injection filling, mold release, etc. ,
Plastic products are molded by injecting material into the cavity.
■）・・・作用、効果
（１）・・・金型の全部若しくは一部を、高速微振動若
しくは超音波振動せしめつつ、材料の射出充填を行うと
、
まず、上記振動によって材料中の微細気泡等が分離され
て材料の密度が増大された状態で流動する。よって、成
形品の内部（肉厚部）に巣などを生じない緻密な成形品
が得られる。■)...Function, effect (1)...When injection filling of material is carried out while subjecting all or part of the mold to high-speed micro-vibration or ultrasonic vibration, first, the vibration causes the fine particles in the material to be Air bubbles, etc. are separated and the material flows in a state where the density is increased. Therefore, a dense molded product without forming cavities inside the molded product (thick part) can be obtained.
（２）・・・金型のキャビティ等の表面と材料との接触
部（材料の層）に振動摩擦が生じ、接触部及びそれに近
接した層部分の材料の粒子（分子）が高速振動し、微小
移動、流動し、また共振して発熱する。(2)... Vibration friction occurs at the contact area (layer of material) between the surface of the mold cavity, etc. and the material, and the particles (molecules) of the material in the contact area and the layer near it vibrate at high speed. It moves minutely, flows, and resonates to generate heat.
（３）・・・該発熱によって、材料の溶融流動性が保た
れるため、金型に接触して温度低下することによって生
じる所謂スキン層（材料硬化）の形成が阻止乃至遅延さ
れ、従って、振動に伴う上記粒子微移動作用と相俟って
、材料が金型の表面に緊密に馴んで、その微細形状部分
や微細径孔部分等まで侵入充填され、その結果、超精密
成形が実現されるものである。(3)...The heat generation maintains the melt fluidity of the material, thereby preventing or delaying the formation of a so-called skin layer (material hardening) that occurs when the temperature decreases upon contact with the mold. Coupled with the above-mentioned particle movement effect caused by vibration, the material fits closely to the surface of the mold and penetrates and fills the micro-shaped parts and micro-diameter parts, and as a result, ultra-precision molding is achieved. It is something that
このことからして、例えば、従来射出成形法では製造困
難とされてきた、コンパクトディスク等の超精密製品の
射出成形も可能となる他、例えば、従来では途中で材料
が冷えて硬化し途切れてしまうため、成形不能とされて
いた極めて細い径の孔（型）でも、充分に材料が流れて
、成形可能となるなどの秀れた特性を発揮し得る。This makes it possible, for example, to injection mold ultra-precision products such as compact discs, which were considered difficult to manufacture using conventional injection molding methods. As a result, the material can sufficiently flow through holes (molds) with extremely small diameters, which were previously thought to be impossible to mold, and exhibit excellent properties such as being able to be molded.
（４）・・・上記、発熱作用によるスキン層不形成乃至
形成遅延作用は、キャビティに限らず、スプル、ランナ
、ゲート等においても同様に作用して、材料の流動性を
著しく向上するので、例えば、それらの径を従来より小
さく形成し得る等の利点も生しる。(4)...The above-mentioned non-formation or formation delay effect of the skin layer due to the heat generation effect is not limited to the cavity, but also acts in the same way on the sprue, runner, gate, etc., and significantly improves the fluidity of the material. For example, there is an advantage that their diameters can be made smaller than conventional ones.
（５）・・・また、上記のように、金型の全部若しくは
一部を高速微振動若しくは超音波振動せしめているため
、材料とキャビティ表面との間は、厳密には、常時ミク
ロン単位で分離状態にあり、これは材料が硬化した後も
同様であるため、成形品は成形完了と同時に離型状態に
あることとなる。(5)...Also, as mentioned above, since all or part of the mold is subjected to high-speed microvibration or ultrasonic vibration, the distance between the material and the cavity surface is strictly speaking in microns at all times. Since the molded product is in a separated state and remains the same even after the material has hardened, the molded product is in a released state at the same time as molding is completed.
よって、離型性が極めて良く、場合によってはエジェク
タービン等１）Ｙ不要となる効果があり、従って、従来
、極めて小形なためや形状的制約などのため、エジェク
タービン等を設置できないようなものの離型も容易とな
る。Therefore, the mold releasability is extremely good, and in some cases there is an effect that an ejector turbine, etc. (1) Y is not required. It also becomes easier to release the mold.
（６）・・・なお、金型を振動せしめるタイミングは、
（１）、射出成形工程中、終始連続して振動せしめる他
、例えば、
（ｉｉ）、材料を射出充填する設定時間振動せしめ、設
定時間停止し、離型時に設定時間振動せしめる、
等が考えられるが、上記に限らず、振動連続、断続及び
そのタイミングや時間等は、材料の性質、温度、型の形
状等に応じて適宜プログラムするものである。(6)...In addition, the timing of making the mold vibrate is as follows: (1) The mold is vibrated continuously from beginning to end during the injection molding process, and (ii) The mold is vibrated for a set time when the material is injected and filled. Possible methods include stopping for a certain period of time and then vibrating for a set period of time when releasing the mold, but this is not limited to the above; continuous vibration, intermittent vibration, and its timing and duration can be programmed as appropriate depending on the properties of the material, temperature, shape of the mold, etc. It is something to do.
出願人 阿 部 悦 久Applicant Hisashi Abe
Claims (3)
して成形を行うプラスチック射出成形法において、 金型を、適宜手段で、高速微振動若しくは超音波振動せ
しめた状態で、溶融樹脂材料をキャビティ中に射出充填
して、プラスチック製品の成形を行うようにしたことを
特徴とする、 プラスチック射出成形方法。(1) In a plastic injection molding method in which molten resin material is injected and filled into a mold cavity, the molten resin material is A plastic injection molding method characterized in that a plastic product is molded by injecting and filling into a cavity.
発生装置若しくは超音波発生装置で、高速微振動若しく
は超音波振動せしめた状態で、溶融樹脂材料をキャビテ
ィ中に射出充填して、プラスチック製品の成形を行うよ
うにしたことを特徴とする、 プラスチック射出成形方法。(2) Inject and fill the molten resin material into the cavity while all or part of the mold is subjected to high-speed micro-vibration or ultrasonic vibration using an appropriate high-speed micro-vibration generator or ultrasonic generator. , a plastic injection molding method characterized by molding a plastic product.
、または、射出充填時、離型時等に断続して、高速微振
動若しくは超音波振動せしめた状態で、溶融樹脂材料を
キャビティ中に射出充填して、プラスチック製品の成形
を行うようにしたことを特徴とする、 プラスチック射出成形方法。(3) All or part of the mold is subjected to high-speed microvibration or ultrasonic vibration, either continuously during the molding process or intermittently during injection and filling, mold release, etc. A plastic injection molding method characterized in that a plastic product is molded by injection filling into a cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP735588A JPH01182016A (en) | 1988-01-16 | 1988-01-16 | Plastic injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP735588A JPH01182016A (en) | 1988-01-16 | 1988-01-16 | Plastic injection molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01182016A true JPH01182016A (en) | 1989-07-19 |
Family
ID=11663650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP735588A Pending JPH01182016A (en) | 1988-01-16 | 1988-01-16 | Plastic injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01182016A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01218813A (en) * | 1988-02-29 | 1989-09-01 | Komatsu Ltd | Plastic molding method |
| WO2005102650A1 (en) * | 2004-04-23 | 2005-11-03 | Husky Injection Molding Systems Ltd. | Method and apparatus for vibrating melt within an injection mold using active material elements |
| WO2006062974A2 (en) * | 2004-12-07 | 2006-06-15 | 3M Innovative Properties Company | Method of molding a microneedle |
| JP2007069393A (en) * | 2005-09-05 | 2007-03-22 | Ntn Corp | Method for forming dynamic pressure groove |
| WO2007108444A1 (en) * | 2006-03-17 | 2007-09-27 | Mitsubishi Rayon Co., Ltd. | Energy beam hardening resin injection molding apparatus and process for producing molded article |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52109556A (en) * | 1976-03-12 | 1977-09-13 | Hitachi Ltd | Plastic injection molding method |
| JPS58140222A (en) * | 1982-02-17 | 1983-08-19 | Hitachi Ltd | Method of and apparatus for manufacturing plastic lens |
| JPS6116824A (en) * | 1985-06-05 | 1986-01-24 | Hiroyuki Morita | Mold |
| JPS62135334A (en) * | 1985-12-10 | 1987-06-18 | Hitachi Maxell Ltd | Method and apparatus for preparing disk substrate for recording optical information |
| JPS62135333A (en) * | 1985-12-10 | 1987-06-18 | Hitachi Maxell Ltd | Method and apparatus for preparing disk substrate for recording optical information |
| JPS62249717A (en) * | 1986-04-24 | 1987-10-30 | Daicel Chem Ind Ltd | Prosess of molding base plate of optical disk |
| JPS6395920A (en) * | 1986-10-14 | 1988-04-26 | Fuji Electric Co Ltd | Injection molding of resin sheet |
-
1988
- 1988-01-16 JP JP735588A patent/JPH01182016A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52109556A (en) * | 1976-03-12 | 1977-09-13 | Hitachi Ltd | Plastic injection molding method |
| JPS58140222A (en) * | 1982-02-17 | 1983-08-19 | Hitachi Ltd | Method of and apparatus for manufacturing plastic lens |
| JPS6116824A (en) * | 1985-06-05 | 1986-01-24 | Hiroyuki Morita | Mold |
| JPS62135334A (en) * | 1985-12-10 | 1987-06-18 | Hitachi Maxell Ltd | Method and apparatus for preparing disk substrate for recording optical information |
| JPS62135333A (en) * | 1985-12-10 | 1987-06-18 | Hitachi Maxell Ltd | Method and apparatus for preparing disk substrate for recording optical information |
| JPS62249717A (en) * | 1986-04-24 | 1987-10-30 | Daicel Chem Ind Ltd | Prosess of molding base plate of optical disk |
| JPS6395920A (en) * | 1986-10-14 | 1988-04-26 | Fuji Electric Co Ltd | Injection molding of resin sheet |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01218813A (en) * | 1988-02-29 | 1989-09-01 | Komatsu Ltd | Plastic molding method |
| WO2005102650A1 (en) * | 2004-04-23 | 2005-11-03 | Husky Injection Molding Systems Ltd. | Method and apparatus for vibrating melt within an injection mold using active material elements |
| KR100819983B1 (en) * | 2004-04-23 | 2008-04-08 | 허스키 인젝션 몰딩 시스템즈 리미티드 | Method and apparatus for vibrating melt within an injection mold using active material elements |
| WO2006062974A2 (en) * | 2004-12-07 | 2006-06-15 | 3M Innovative Properties Company | Method of molding a microneedle |
| WO2006062974A3 (en) * | 2004-12-07 | 2006-09-28 | 3M Innovative Properties Co | Method of molding a microneedle |
| EP2067599A3 (en) * | 2004-12-07 | 2010-01-27 | 3M Innovative Properties Company | Method of molding a microneedle |
| US8088321B2 (en) | 2004-12-07 | 2012-01-03 | 3M Innovative Properties Company | Method of molding a microneedle |
| US8246893B2 (en) | 2004-12-07 | 2012-08-21 | 3M Innovative Properties Company | Method of molding a microneedle |
| US8821779B2 (en) | 2004-12-07 | 2014-09-02 | 3M Innovative Properties Company | Method of molding a microneedle |
| JP2007069393A (en) * | 2005-09-05 | 2007-03-22 | Ntn Corp | Method for forming dynamic pressure groove |
| WO2007108444A1 (en) * | 2006-03-17 | 2007-09-27 | Mitsubishi Rayon Co., Ltd. | Energy beam hardening resin injection molding apparatus and process for producing molded article |
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