JPH10296733A - Molding method for improving sinkmark and mold temperature controlling system - Google Patents
Molding method for improving sinkmark and mold temperature controlling systemInfo
- Publication number
- JPH10296733A JPH10296733A JP9127947A JP12794797A JPH10296733A JP H10296733 A JPH10296733 A JP H10296733A JP 9127947 A JP9127947 A JP 9127947A JP 12794797 A JP12794797 A JP 12794797A JP H10296733 A JPH10296733 A JP H10296733A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- mold
- cooling
- resin
- molding method
- 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
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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
-
- 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C2045/7356—Heating or cooling of the mould the temperature of the mould being near or higher than the melting temperature or glass transition temperature of the moulding material
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C2045/7393—Heating or cooling of the mould alternately heating and cooling
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
【0001】[0001]
【発明の属する技術分野】本発明は、熱可塑性合成樹脂
の射出成形法またはガスアシスト成形成形法等による成
形品にあって、いわゆるヒケの生じない、高品質・高外
観に形成するためのヒケを改善する成形方法およびこの
成形方法の実施に適する金型温度調節システムに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded article obtained by injection molding or gas-assist molding of a thermoplastic synthetic resin. And a mold temperature control system suitable for carrying out the molding method.
【0002】[0002]
【従来の技術】熱可塑性合成樹脂、特に高機能性樹脂と
も呼ばれるエンジニアリングプラスチックスを素材とす
る各種成形品が、様々な製品に多用されている。さら
に、これらの製品では外観部品でありかつ機能を保持す
るために補強リブを設置したデザインとなり、強度と外
観の両方が要求される。2. Description of the Related Art Various molded products made of engineering plastics, also called thermoplastic synthetic resin, especially high-performance resin, are widely used for various products. Furthermore, these products are appearance parts and have a design in which reinforcing ribs are installed in order to maintain their functions, and are required to have both strength and appearance.
【0003】外観の良好なサンプルを得るには、金型温
度を上げる事が効果があるが、特に裏側にリブが形成さ
れている場合、成形品表面のヒケ(成形後の冷却に伴っ
て生ずる凹み)が問題となる。In order to obtain a sample having a good appearance, it is effective to increase the temperature of the mold. However, in particular, when ribs are formed on the back side, sink marks on the surface of the molded product (which occur with cooling after molding). (Dent) is a problem.
【0004】このような欠点を解消するために、成形時
の圧力を必要以上に上昇させると、バリや形状精度低下
等の不具合を生ずる。また、金型温度を低下させると、
所期の目的である外観向上の要請に反することになり、
両立し得ない。If the pressure at the time of molding is increased more than necessary in order to eliminate such defects, problems such as burrs and a decrease in shape accuracy occur. Also, when the mold temperature is lowered,
Contrary to the intended purpose of improving the appearance,
Incompatible.
【0005】[0005]
【発明が解決しようとする課題】本発明は、上述の従来
技術の欠点を解消して、エンジニアリングプラスチック
を使用し、外観が良好、かつヒケの無い成形品が得られ
るヒケを改善する成形方法およびこの成形方法の実施に
適する金型温度調節システムを提供することを課題とす
る。SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art, and uses an engineering plastic to improve the sink mark, which provides a molded article having a good appearance and no sink marks. It is an object of the present invention to provide a mold temperature control system suitable for carrying out this molding method.
【0006】[0006]
【課題を解決するための手段】本発明にかかる課題は、
熱可塑性樹脂により、ヒケの生じない高外観成形品を得
るために、使用樹脂のガラス転移温度もしくは熱変形温
度以上に金型温度を上昇せしめ、高外観を得たい面の冷
却を溶融樹脂の充填完了時から開始し、当該温度が使用
樹脂のガラス転移温度もしくは熱変形温度以下に低下し
た時点で異なる反対側の冷却を開始するヒケを改善する
成形法によって解決される。The object of the present invention is to provide
In order to obtain a molded product with high appearance without sink marks by using thermoplastic resin, the mold temperature is raised above the glass transition temperature or thermal deformation temperature of the resin used. The problem is solved by a molding method which starts from the time of completion and improves the sink to start cooling on the opposite side when the temperature falls below the glass transition temperature or the heat distortion temperature of the resin used.
【0007】また、本発明にかかる課題は、熱可塑性樹
脂による高外観成形品を得るために、成形時の金型温度
を使用樹脂のガラス転移温度もしくは熱変形温度以上に
上げる成形方法のための金型温度調節システムであっ
て、冷却時の金型温度を固定金型側および可動金型側の
各々を独立して制御可能とした金型温度調節システムに
よって解決される。Another object of the present invention is to provide a molding method in which the temperature of a mold at the time of molding is raised to a temperature equal to or higher than the glass transition temperature or thermal deformation temperature of the resin used in order to obtain a high-appearance molded product made of a thermoplastic resin. The problem is solved by a mold temperature control system, wherein a mold temperature at the time of cooling can be controlled independently for each of a fixed mold side and a movable mold side.
【0008】当該温度が使用樹脂のガラス転移温度もし
くは熱変形温度以下に低下したか否かは、金型内に埋め
込まれた温度センサーによって感知され、反対面への冷
水の供給を開始する。また、予め当該温度の低下を測定
し、これを時間で正確に推定することが可能であり、し
たがってタイマー制御することができる。Whether the temperature has dropped below the glass transition temperature or the heat distortion temperature of the resin used is sensed by a temperature sensor embedded in the mold, and the supply of cold water to the opposite surface is started. In addition, it is possible to measure the decrease in the temperature in advance and accurately estimate the decrease in time, and therefore, it is possible to perform timer control.
【0009】[0009]
【作用】本発明にかかる金型の温度調節システムを使用
するヒケを改善する成形方法によれば、使用樹脂のガラ
ス転移温度もしくは熱変形温度以上に加熱された金型内
に射出された溶融樹脂は、充填が完了した時点で、片面
の表層から冷却が開始される。すなわち、高外観を得た
い側の冷却が先に開始されることによりその部分の溶融
樹脂が固化され始める。According to the molding method for improving sink marks using the mold temperature control system according to the present invention, the molten resin injected into the mold heated above the glass transition temperature or heat deformation temperature of the resin used. When the filling is completed, cooling is started from the surface layer on one side. That is, when the cooling of the side for which a high appearance is desired is started first, the molten resin in that portion starts to be solidified.
【0010】さらに、キャビティ内に充填された樹脂
は、ガラス転移温度もしくは熱変形温度以下に急冷され
ることによって、キャビティ形状を忠実に再現する。こ
の時、反対側の表面高外観を得たい側と反対側の表面と
接している樹脂は、ガラス転移温度もしくは熱変形温度
以上であるため、容易に変形可能であることから、収縮
は先に冷却固化の始まっている面側に引張られるように
起こり、その面の形状再現に寄与する。Further, the resin filled in the cavity is rapidly cooled to a temperature lower than a glass transition temperature or a heat deformation temperature, thereby faithfully reproducing the shape of the cavity. At this time, the resin in contact with the surface on the opposite side where the surface high appearance is desired and the surface on the opposite side are easily deformable because the temperature is higher than the glass transition temperature or the heat deformation temperature. It occurs so as to be pulled toward the surface where cooling and solidification has started, contributing to the reproduction of the shape of that surface.
【0011】その後、冷却が遅れていた面の表面温度を
低下させるために、その面側の冷却を開始する。この開
始時期は、キャビティ内に設置された温度センサーまた
は予め検討された時間によって調整されたタイマーによ
ってなされる。Thereafter, in order to lower the surface temperature of the surface whose cooling has been delayed, cooling of the surface is started. This start time is provided by a temperature sensor installed in the cavity or a timer adjusted by a pre-determined time.
【0012】その結果、成形品の片側に、高外観かつ反
対側のリブやボスなどのような肉厚変化に影響されな
い、ヒケの無い成形品が得られる。As a result, on one side of the molded product, there is obtained a molded product having a high appearance and being free from a change in wall thickness such as a rib or boss on the opposite side and having no sink mark.
【0013】[0013]
【発明の実施の形態】以下、実施例を示す添付図を参照
しつつ本発明を開示する。図1は、本発明にかかるヒケ
防止成形方法を実施する際の金型温度調節システムのモ
デル図であり、固定金型側と可動金型側の間に形成され
るキャビティ内に射出シリンダーから射出された溶融樹
脂を、固定金型側・可動金型側各々に設置された冷却水
管で冷却し、所望の成形品を得るものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be disclosed below with reference to the accompanying drawings showing embodiments. FIG. 1 is a model diagram of a mold temperature control system when the anti-sink molding method according to the present invention is carried out. Injection from an injection cylinder into a cavity formed between a fixed mold side and a movable mold side. The molten resin thus obtained is cooled by cooling water pipes provided on each of the fixed mold side and the movable mold side to obtain a desired molded product.
【0014】金型内には、温度センサーが設置されてお
り、高外観を得るためにガラス転移温度もしくは熱変形
温度以上としたキャビティ表面、すなわちここでは固定
金型側のキャビティ形状の再現部分が、キャビティへの
充填が完了した時点で、該当部分の温度を低下せしめ、
さらに、該当部分の温度がガラス転移温度もしくは熱変
形温度以下に低下したことを、感知するものである。そ
の後、直ちに可動金型側の冷却水を急速循環し、溶融樹
脂を固化させてキャビティ形状を忠実に再現する。In the mold, a temperature sensor is installed, and in order to obtain a high appearance, a cavity surface having a glass transition temperature or a heat deformation temperature or higher, that is, a portion where the cavity shape on the fixed mold side is reproduced, is used. When the filling of the cavity is completed, lower the temperature of the corresponding part,
Further, it senses that the temperature of the corresponding portion has dropped below the glass transition temperature or the heat distortion temperature. Then, the cooling water on the movable mold side is immediately circulated immediately to solidify the molten resin and faithfully reproduce the cavity shape.
【0015】図2は、本発明にかかるヒケを改善する成
形方法に伴う金型温度の変化を示すタイムチャートであ
る。この実施例では、固定金型側のキャビティ面を高外
観にするものと仮定する。ここに時間軸である横軸に記
入した樹脂射出開始、樹脂射出終了を経て、当初高外観
を得たい面に位置する金型、例えば固定金型側の冷却を
開始し、この冷却に伴う温度変化が所定値に達した際に
反対面、この例では可動金型側の冷却を開始するもので
ある。このような冷却は、キャビティ表面温度を監視し
つつ、冷却水の急速循環により実施される。FIG. 2 is a time chart showing a change in mold temperature according to the molding method for improving sink marks according to the present invention. In this embodiment, it is assumed that the cavity surface on the fixed mold side has a high appearance. After the start of resin injection and the end of resin injection marked on the horizontal axis, which is the time axis, cooling of the mold, for example, the fixed mold side, which is initially located on the surface for which a high appearance is desired, is started, and the temperature accompanying this cooling When the change reaches a predetermined value, cooling on the opposite side, in this example, the movable mold side is started. Such cooling is performed by rapid circulation of cooling water while monitoring the cavity surface temperature.
【0016】図3は、本発明にかかるヒケを改善する成
形方法により成形された成形品の例を示す平面図、正面
図およびA−A断面図ものである。この成形品は150 mm
×80mm,高さ12 mmで、肉厚2.5 mmの箱状体であり、中央
部に1.6 mmのリブが形成されている。外観を向上させる
ためにガラス転移温度もしくは熱変形温度以上の金型温
度で成形された成形品は、その後冷却してもリブの反対
面にヒケが発生し、これを表面粗度計にて実測すると0.
15 mmの凹みが確認されたが、本発明にかかる成形方法
によれば、その凹みは0.02 mmであり、目視で確認出来
ない良好な成形品が得られた。FIG. 3 is a plan view, a front view, and an AA sectional view showing an example of a molded product formed by the molding method for improving sink marks according to the present invention. This part is 150 mm
It is a box-shaped body with a size of × 80 mm, a height of 12 mm, and a thickness of 2.5 mm, and a 1.6-mm rib is formed at the center. Molded products molded at a mold temperature higher than the glass transition temperature or thermal deformation temperature to improve the appearance will have sink marks on the opposite surface of the ribs even after cooling, and this will be measured with a surface roughness meter Then 0.
Although a dent of 15 mm was confirmed, according to the molding method of the present invention, the dent was 0.02 mm, and a good molded product that could not be visually confirmed was obtained.
【0017】[0017]
【発明の効果】本発明にかかるヒケを改善する成形方法
によれば、金型温度をガラス転移温度もしくは熱変形温
度以上に上げて溶融樹脂を射出した後冷却する熱可塑性
合成樹脂の成形方法において、冷却開始タイミングを金
型内に設けられた温度センサーもしくはタイマーによっ
て差を生じさせることにより、ヒケの無いかつ外観が良
好な成形品を得ることができる。According to the molding method for improving sink marks according to the present invention, there is provided a method for molding a thermoplastic synthetic resin in which a mold temperature is raised to a glass transition temperature or a heat deformation temperature or higher, a molten resin is injected and then cooled. By making the cooling start timing different by a temperature sensor or a timer provided in the mold, it is possible to obtain a molded product having no sink mark and having a good appearance.
【0016】[0016]
【図1】本発明にかかるヒケを改善する成形方法を実施
するための、金型の温度調節システムの構成を示す説明
図である。FIG. 1 is an explanatory diagram showing a configuration of a mold temperature control system for carrying out a molding method for improving sink marks according to the present invention.
【図2】本発明にかかるヒケを改善する成形方法のため
の温度制御におけるタイムチャートである。FIG. 2 is a time chart in temperature control for a molding method for improving sink marks according to the present invention.
【図3】本説明にかかるヒケを改善する成形方法により
得られたリブ付き成形品の例を示す図である。FIG. 3 is a diagram showing an example of a molded product with ribs obtained by a molding method for improving sink marks according to the present description.
1 固定金型 2 可動金型 3 温度センサー 4 加熱・冷却水入口 5 加熱・冷却水出口 6 温・冷水の切替え装置 7 温調機 DESCRIPTION OF SYMBOLS 1 Fixed mold 2 Movable mold 3 Temperature sensor 4 Heating / cooling water inlet 5 Heating / cooling water outlet 6 Switching device for hot / cold water 7 Temperature controller
Claims (6)
生じない高外観成形品を製造するために、成形時の金型
温度を使用樹脂のガラス転移温度もしくは熱変形温度以
上に上げる成形方法において、 冷却時の金型温度を固定金型側および可動金型側の各々
を独立して制御可能とした金型温度調節システムを使用
し、溶融樹脂のキャビティへの充填が完了した時点にお
いて高外観を得たい面の金型の冷却を開始し、さらに当
該温度が使用樹脂のガラス転移温度もしくは熱変形温度
以下に低下した時点で、反対の金型面の冷却を開始する
ことを特徴とする、ヒケを改善する成形方法。1. A molding method in which a mold temperature during molding is raised to a temperature higher than a glass transition temperature or a heat deformation temperature of a used resin in order to produce a molded article having a high appearance without using sink, using a thermoplastic high-performance resin. The mold temperature control system that allows the mold temperature during cooling to be independently controllable on each of the fixed mold side and the movable mold side is used. Starting cooling of the mold on the surface to obtain the appearance, and further cooling the opposite mold surface when the temperature falls below the glass transition temperature or heat deformation temperature of the resin used. , A molding method for improving sink marks.
度が所定温度に低下したことを、金型内に装着された温
度センサーにより感知し、それと連動した温調機によっ
て反対面の冷却を開始することを特徴とする、ヒケを改
善する成形方法。2. A temperature sensor mounted in the mold detects that the temperature of the mold on the surface for which a high appearance is desired is lowered to a predetermined temperature, and cools the opposite surface by a temperature controller interlocked with the temperature sensor. A molding method for improving sink marks, wherein
定温度に低下したことを、予め検討された時間で推定
し、タイマーと連動した温調機によって可動側の冷却を
開始することを特徴とする、ヒケを改善する成形方法。3. A method in which the mold temperature of the surface for which a high appearance is desired to be reduced to a predetermined temperature is estimated for a predetermined time, and cooling of the movable side is started by a temperature controller linked with a timer. A molding method for improving sink marks, characterized in that:
スを溶融樹脂内に注入しつつ、金型温度を個別に制御す
る、請求項1ないし2ないし3に記載のヒケを改善する
成形方法。4. The molding method according to claim 1, wherein the mold temperature is individually controlled while injecting a high-pressure gas into the molten resin in a molded article having a hollow portion.
生じない高外観成形品を製造するために、成形時の金型
温度を使用樹脂のガラス転移温度もしくは熱変形温度以
上に上げる成形方法のための金型温度調節システムにお
いて、 溶融樹脂の冷却時の金型温度を固定金型側および可動金
型側の各々を独立して制御可能としたことを特徴とする
金型温度調節システム。5. In order to produce a molded article having a high appearance without sink marks by using a thermoplastic high-performance resin, the molding temperature at the time of molding is raised to a temperature higher than a glass transition temperature or a heat deformation temperature of the resin used. A mold temperature control system for a method, wherein a mold temperature during cooling of a molten resin can be controlled independently for each of a fixed mold side and a movable mold side. .
ぞれの温度調節が、冷水および熱水の切り替え制御によ
って行なわれることを特徴とする、請求項5に記載の金
型温度調節システム。6. The mold temperature control system according to claim 5, wherein the temperature of each of the fixed mold and the movable mold is adjusted by switching between cold water and hot water.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12794797A JP3946813B2 (en) | 1997-04-30 | 1997-04-30 | Molding method to improve sink marks |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12794797A JP3946813B2 (en) | 1997-04-30 | 1997-04-30 | Molding method to improve sink marks |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10296733A true JPH10296733A (en) | 1998-11-10 |
JP3946813B2 JP3946813B2 (en) | 2007-07-18 |
Family
ID=14972582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12794797A Expired - Lifetime JP3946813B2 (en) | 1997-04-30 | 1997-04-30 | Molding method to improve sink marks |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3946813B2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002096361A (en) * | 2000-09-22 | 2002-04-02 | Ricoh Co Ltd | Method for manufacturing plastic molded article, mold for injection molding, and plastic molded article |
EP1446274A2 (en) * | 2001-10-26 | 2004-08-18 | Aclara BioSciences, Inc. | System and method for injection molded micro-replication of micro-fluidic substrates |
JP2010052235A (en) * | 2008-08-27 | 2010-03-11 | Asahi Kasei Chemicals Corp | Method of injection-molding thin-walled molded object having high appearance |
CN103707476A (en) * | 2013-12-20 | 2014-04-09 | 杨海涛 | Fixed mold of injection mold of mobile phone shell |
US9242400B2 (en) | 2012-06-22 | 2016-01-26 | Kumi Kasei Co., Ltd. | Resin injection molding method and resin injection molded product |
EP3332936A1 (en) * | 2016-12-07 | 2018-06-13 | Letoplast Invest NV | Method for producing an injection moulded product with a higher rib-to-wall thickness ratio |
JP2019209650A (en) * | 2018-06-07 | 2019-12-12 | クミ化成株式会社 | Injection mold |
WO2023135848A1 (en) * | 2022-01-13 | 2023-07-20 | 横浜ゴム株式会社 | Production method and device for curved resin pipe |
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JPS59162217U (en) * | 1983-04-15 | 1984-10-30 | トヨタ自動車株式会社 | injection mold |
JPS61233520A (en) * | 1985-04-09 | 1986-10-17 | Canon Inc | Preparation of molded product |
JPS62130763A (en) * | 1985-11-29 | 1987-06-13 | Fuso Light Alloys Co Ltd | Metallic mold |
JPS63290718A (en) * | 1987-05-22 | 1988-11-28 | Matsushita Electric Ind Co Ltd | Molding temperature control method and sequence temperature control device |
JPS63293028A (en) * | 1987-05-27 | 1988-11-30 | Nippon Dennetsu Kk | Method and apparatus for controlling temperature of injection mold |
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JPH04144723A (en) * | 1990-10-08 | 1992-05-19 | Mitsubishi Kasei Corp | Manufacture of fiber-reinforced resin molded form |
JPH06892A (en) * | 1992-06-22 | 1994-01-11 | Toshiba Corp | Fresnel lens molding method and apparatus |
JPH06315961A (en) * | 1993-05-10 | 1994-11-15 | Tohoku Munekata Kk | Method and apparatus for injection molding without causing visible sink mark on product |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2002096361A (en) * | 2000-09-22 | 2002-04-02 | Ricoh Co Ltd | Method for manufacturing plastic molded article, mold for injection molding, and plastic molded article |
EP1446274A2 (en) * | 2001-10-26 | 2004-08-18 | Aclara BioSciences, Inc. | System and method for injection molded micro-replication of micro-fluidic substrates |
EP1446274A4 (en) * | 2001-10-26 | 2010-06-30 | Aclara Biosciences Inc | System and method for injection molded micro-replication of micro-fluidic substrates |
JP2010052235A (en) * | 2008-08-27 | 2010-03-11 | Asahi Kasei Chemicals Corp | Method of injection-molding thin-walled molded object having high appearance |
US9242400B2 (en) | 2012-06-22 | 2016-01-26 | Kumi Kasei Co., Ltd. | Resin injection molding method and resin injection molded product |
CN103707476A (en) * | 2013-12-20 | 2014-04-09 | 杨海涛 | Fixed mold of injection mold of mobile phone shell |
CN103707476B (en) * | 2013-12-20 | 2015-09-23 | 杨海涛 | A kind of cover half of Plastic injection mould for mobile phone shell |
EP3332936A1 (en) * | 2016-12-07 | 2018-06-13 | Letoplast Invest NV | Method for producing an injection moulded product with a higher rib-to-wall thickness ratio |
JP2019209650A (en) * | 2018-06-07 | 2019-12-12 | クミ化成株式会社 | Injection mold |
WO2023135848A1 (en) * | 2022-01-13 | 2023-07-20 | 横浜ゴム株式会社 | Production method and device for curved resin pipe |
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