JP3027148B2 - Injection mold to prevent jetting during gas injection molding - Google Patents

Injection mold to prevent jetting during gas injection molding

Info

Publication number
JP3027148B2
JP3027148B2 JP10298872A JP29887298A JP3027148B2 JP 3027148 B2 JP3027148 B2 JP 3027148B2 JP 10298872 A JP10298872 A JP 10298872A JP 29887298 A JP29887298 A JP 29887298A JP 3027148 B2 JP3027148 B2 JP 3027148B2
Authority
JP
Japan
Prior art keywords
cavity
mold
injection
gate
injected
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.)
Expired - Fee Related
Application number
JP10298872A
Other languages
Japanese (ja)
Other versions
JPH11192644A (en
Inventor
在權 李
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of JPH11192644A publication Critical patent/JPH11192644A/en
Application granted granted Critical
Publication of JP3027148B2 publication Critical patent/JP3027148B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • 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
    • B29C45/2708—Gates
    • 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
    • B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
    • B29C2045/0049—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity the injected material flowing against a mould cavity protruding part

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、ガス射出成型時の
ジェッティング（Jeting）防止のための金型に係り、よ
り詳しくは、ガス射出成型時に溶融されたレジン（Resi
n）が射出金型のゲート（Gate）を通して一方向へ高速
で噴射されるとき、発生しやすいジェッティングの跡に
よる外観の不良を未然防止するようにしたガス射出成型
時のジェッティング防止のための射出金型に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for preventing jetting during gas injection molding, and more particularly, to a resin melted during gas injection molding.
n) Injection at high speed in one direction through the gate of the injection mold to prevent the appearance defect due to the trace of the jetting which is likely to occur. Related to an injection mold.

【０００２】[0002]

【従来の技術】一般に、従来による射出金型１０は、図
１に示すように、上下積層されるように結合される上部
金型１１および下部金型１２とからなる。2. Description of the Related Art In general, a conventional injection mold 10 comprises an upper mold 11 and a lower mold 12 which are connected so as to be vertically stacked as shown in FIG.

【０００３】この際、前記上部金型１１と下部金型１２
とが相互に接触される内側面の中央には、キャビティー
１３が形成されており、前記上部金型１１と下部金型１
２とが相互に接触される一側端にはガス射出成型に必要
な溶融状態のレジンが前記キャビティー１３内に流入さ
れるようにランナ１４が形成され、前記キャビティー１
３とランナ１４との間にはランナ１４を通して注入され
る溶融状態のレジンが急速度にキャビティー１３に噴射
されうるようゲート１５が狭く形成されている。At this time, the upper mold 11 and the lower mold 12
A cavity 13 is formed at the center of the inner surface where the upper mold 11 and the lower mold 1 contact each other.
A runner 14 is formed at one end of the cavity 1 so that molten resin required for gas injection molding flows into the cavity 13.
The gate 15 is formed narrow between the runner 3 and the runner 14 so that molten resin injected through the runner 14 can be rapidly injected into the cavity 13.

【０００４】かような、射出金型１０により射出成型さ
れる射出製品２０は、図２に示すように、空気調和機の
室内機において、吐出口を通して室内機の外部に吐出さ
れる冷気流を上下方向へ風向を調整するよう、使用され
る上下風向調整用ブレード等を挙例することができる。As shown in FIG. 2, such an injection product 20 which is injection-molded by the injection mold 10 forms a cool air flow discharged through the discharge port to the outside of the indoor unit in the indoor unit of the air conditioner. A vertical wind direction adjusting blade or the like used to adjust the wind direction in the vertical direction may be used.

【０００５】即ち、前記射出製品２０は、前記射出金型
１０によりガス射出成型後に所定の厚さを維持しつつ、
かつ重さを減少させて材料費を節減させるよう、内部に
空間が形成される構造になっている。That is, the injection product 20 maintains a predetermined thickness after gas injection molding by the injection mold 10 while maintaining the predetermined thickness.
In addition, a space is formed inside to reduce the weight and material cost.

【０００６】[0006]

【発明が解決しようとする課題】ところで、上記のごと
く構成された従来の射出金型１０は、上部金型１１と下
部金型１２とが上下に積層されるように結合された状態
でその一側に形成された狭いゲート１５を通してキャビ
ティー１３の一方向へ溶融状態のレジンを高速に噴射さ
せて射出製品２０を射出成型するようにされているが、
かような射出成型方法は狭いゲート１５を通過する溶融
状態のレジンの噴射速度を調整しない場合、異状流れが
発生して射出成型後、射出製品２０の表面にジェッティ
ングの跡が生じることにより、外観の不良をもたらすと
いう問題点があった。The conventional injection mold 10 constructed as described above has one of the upper molds 11 and the lower molds 12 which are connected in a vertically stacked manner. A molten resin is injected at a high speed in one direction of the cavity 13 through a narrow gate 15 formed on the side to injection-mold the injection product 20.
If the injection molding method does not adjust the injection speed of the molten resin passing through the narrow gate 15, an abnormal flow occurs and after injection molding, a trace of jetting is generated on the surface of the injection product 20, There is a problem that the appearance is deteriorated.

【０００７】[0007]

【発明の目的】そこで、本発明は上記種じゅの問題点を
解決するためになされたものであつて、本発明の目的
は、ガス射出成型時にゲートを通してキャビティーに注
入される溶融状態のレジンの噴射速度を適切に調整する
とともに、多方向へ分散されるようにして、射出成型
後、射出製品の表面にジェッティングの跡による外観の
不良を未然防止するようにしたガス射出成型時のジェッ
ティング防止のための射出金型を提供することにある。SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a molten resin injected into a cavity through a gate during gas injection molding. In addition to properly adjusting the injection speed of the product, it is dispersed in multiple directions, so that after injection molding, the appearance of the product due to the trace of jetting on the surface of the injection product is prevented beforehand. An object of the present invention is to provide an injection mold for preventing pitting.

【０００８】[0008]

【課題を解決するための手段】上記のような目的を達成
するためになされた本発明によガス射出成型時のジェッ
ティング防止のための射出金型は、上部金型と下部金型
とが相互に結合されてその中央にキャビティーが形成さ
れており、前記キャビティーの一側にガス射出成型時に
溶融状態のレジンが急速度にキャビティーに噴射されう
るよう、ゲートが狭く形成された射出金型において、前
記キャビティーには、前記ゲートを通してキャビティー
内に一方向へ高速噴射される溶融状態のレジンがゲート
を通過するとともに、キャビティーに注入される瞬間、
正面衝突により噴射速度が減少されつつ流れが多方向へ
分散されうるよう突起を備えたことを特徴とする。According to the present invention, which has been made to achieve the above object, an injection mold for preventing jetting at the time of gas injection molding comprises an upper mold and a lower mold. A cavity is formed at the center of the cavity, and a narrow gate is formed on one side of the cavity so that molten resin can be rapidly injected into the cavity during gas injection molding. In the mold, at the moment the molten resin that is injected at a high speed into the cavity through the gate in one direction passes through the gate and is injected into the cavity,
A projection is provided so that the flow can be dispersed in multiple directions while the injection speed is reduced by a frontal collision.

【０００９】[0009]

【発明の実施の形態】以下、本発明による一実施の形態
について添付図面に沿つて詳述する。ちなみに、図にお
いて従来の構成と同一部分にたいしては同一名称および
符号を付してそれにつく詳述は省くことにする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to the accompanying drawings. Incidentally, in the drawings, the same parts as those of the conventional configuration are denoted by the same names and reference numerals, and the detailed description attached thereto is omitted.

【００１０】本発明による射出金型４０は、図３に示す
ように、上部金型４１と下部金型４２とが相互に接触さ
れる内側面の中央にキャビティー４３が形成されてお
り、前記上部金型４１と下部金型４２とが相互に接触さ
れる一側端には射出成型に必要な溶融状態のレジンが前
記キャビティー４３内に流入されるよう、ランナ４４が
形成され、前記キャビティー４３とランナ４４との間に
はランナ４４を通して注入される溶融状態のレジンが急
速度にキャビティー４３に噴射されうるよう、ゲート４
５が狭く形成されている。In the injection mold 40 according to the present invention, as shown in FIG. 3, a cavity 43 is formed at the center of the inner surface where the upper mold 41 and the lower mold 42 are in contact with each other. A runner 44 is formed at one end where the upper mold 41 and the lower mold 42 are in contact with each other so that a molten resin required for injection molding flows into the cavity 43. Gate 4 is provided between tee 43 and runner 44 so that molten resin injected through runner 44 can be rapidly injected into cavity 43.
5 is formed narrow.

【００１１】この際、前記下部金型４２側キャビティー
４３の一側には、図４に示すように、前記ゲート４５を
通してキャビティー４３内に一方向へ高速噴射される溶
融状態のレジンがゲート４５を通過するとともに、キャ
ビティー４３に注入される瞬間、正面衝突により少なく
とも二方向以上に流れが両分されて分散されつつ噴射速
度が適切に調整されうるようゲート４５から所定距離を
おいて突起４６が一体に突設されている。At this time, on one side of the cavity 43 on the lower mold 42 side, as shown in FIG. 4, a molten resin which is injected at a high speed into the cavity 43 through the gate 45 in one direction is applied to the gate. At the moment of passing through the cavity 45 and being injected into the cavity 43, a projection is provided at a predetermined distance from the gate 45 so that the jet velocity can be appropriately adjusted while the flow is divided and dispersed in at least two directions due to a head-on collision. 46 are integrally provided.

【００１２】即ち、前記突起４６は、溶融状態のレジン
が正面衝突した後、速度が減少しつつ左右側へ分散され
て前記キャビティー４３内に一様に注入されるよう円柱
状に形成されており、その上面は前記ゲート４５から噴
射される溶融状態のレジンが突起４６に衝突した後、速
度が減少しつつ上部側に分散されてキャビティー４３内
に一様に注入されるよう前記上部金型４１に形成された
キャビティー４３の上面と所定距離をおいて接触されな
いように設けられる。That is, the protrusions 46 are formed in a columnar shape so that after the resin in the molten state collides head-on, the speed is reduced and dispersed to the left and right sides so as to be uniformly injected into the cavity 43. After the molten resin injected from the gate 45 collides with the projection 46, the upper surface thereof is dispersed at an upper side with a reduced speed and is uniformly injected into the cavity 43. It is provided so as not to be in contact with the upper surface of the cavity 43 formed in the mold 41 at a predetermined distance.

【００１３】次に、上記のように構成された本発明の一
実施の形態によるの作用および效果について述べる。Next, the operation and effect of the embodiment of the present invention configured as described above will be described.

【００１４】第３図に示すように、射出金型４０の上部
金型４１と下部金型４２とを上下に積層されるように結
合させた状態で、これらの一側端に形成されたランナ４
４を通して溶融状態のレジンを注入させると、溶融状態
のレジンは狭く形成されたゲート４５により急速度で通
過しつつキャビティー４３内に噴射される。As shown in FIG. 3, the upper mold 41 and the lower mold 42 of the injection mold 40 are connected to each other so as to be vertically stacked. 4
When the molten resin is injected through 4, the molten resin is jetted into the cavity 43 while passing through the narrow gate 45 at a rapid speed.

【００１５】この際、ゲート４５からキャビティー４３
に高速噴射される溶融状態のレジン中の大部分は、ゲー
ト４５から所定距離をおいてキャビティー４３内に設け
た突起４６の正面に衝突して流れが減少および変えられ
るとともに、突起４６にガイドされて左右側へ流れが両
分されて二方向へ分散されることにより、キャビティー
４３内に所定量が満たされる。At this time, the gate 43 is connected to the cavity 43.
Most of the resin in the molten state, which is jetted at high speed, collides with the front of a projection 46 provided in the cavity 43 at a predetermined distance from the gate 45 to reduce and change the flow, and guides the projection 46 to the projection 46. As a result, the flow is divided into two directions to the left and right sides and dispersed in two directions.

【００１６】また、ゲート４５からキャビティー４３に
高速噴射される溶融状態のレジン中の一部は、前記突起
４６に衝突されて流れが減少および変えられつつ突起４
６の上面とキャビティー４３の天井との間に形成された
所定の隙間を通して分散されることにより、キャビティ
ー４３内に所定量が満たされる。したがって、ゲート４
５を通して一方向へ高速噴射される溶融状態のレジン
は、キャビティー４３内に注入される瞬間、キャビティ
ー４３の入口端に突設された突起４６に衝突されて噴射
速度が適切に減少されつつ多方向へ分散されてキャビテ
ィー内に一様に注入されるため、射出成型後、射出製品
２０の表面に異状流れの発生によるジェッティング跡に
よる外観の不良を未然防止できるようになる。Further, a part of the molten resin which is injected at high speed from the gate 45 to the cavity 43 collides with the projection 46 to reduce and change the flow, thereby reducing the projection 4.
By dispersing through a predetermined gap formed between the upper surface of 6 and the ceiling of the cavity 43, the cavity 43 is filled with a predetermined amount. Therefore, gate 4
5 is injected into the cavity 43 at a high speed, and at the moment it is injected into the cavity 43, the resin hits a projection 46 protruding from the entrance end of the cavity 43 and the injection speed is appropriately reduced. Since it is dispersed in multiple directions and uniformly injected into the cavity, it is possible to prevent the appearance defect due to the jetting trace due to the generation of the abnormal flow on the surface of the injection product 20 after the injection molding.

【００１７】[0017]

【発明の效果】上述のように、本発明によるガス射出成
型時のジェッティング防止のための射出金型によれば、
射出成型時のゲートを高速に通過する溶融状態のレジン
がキャビティーに注入される瞬間、正面衝突により噴射
速度が適切に減少されてから、多方向へ分散されつつキ
ャビティー内に一様に注入されうるよう、キャビティー
の入口端に突起を形成した構造になっているため、射出
成型後、射出製品の表面に生じるジェッティング跡によ
る外観の不良を未然防止できるという優れた效果があ
る。As described above, according to the injection mold for preventing jetting at the time of gas injection molding according to the present invention,
At the moment when molten resin that passes through the gate at high speed during injection molding is injected into the cavity, the injection speed is appropriately reduced by head-on collision, and then uniformly injected into the cavity while being dispersed in multiple directions. As a result, since the projection is formed at the entrance end of the cavity, there is an excellent effect that the appearance defect due to the jetting traces generated on the surface of the injection product after the injection molding can be prevented.

【図面の簡単な説明】[Brief description of the drawings]

【図１】 従来による射出金型構造を示す断面図であ
る。FIG. 1 is a cross-sectional view showing a conventional injection mold structure.

【図２】 従来による射出金型により射出成型時に射出
製品の表面に生じたジェッティング跡を示す斜視図であ
る。FIG. 2 is a perspective view showing a jetting mark generated on the surface of an injection product during injection molding by a conventional injection mold.

【図３】 本発明の射出金型構造を示す断面図である。FIG. 3 is a sectional view showing an injection mold structure of the present invention.

【図４】 本発明による射出金型の下部金型を示す斜視
図である。FIG. 4 is a perspective view showing a lower mold of the injection mold according to the present invention.

【符号の説明】[Explanation of symbols]

２０ 射出製品 ４０ 射出金型 ４１ 上部金型 ４２ 下部金型 ４３ キャビティー ４４ ランナ ４５ ゲート ４６ 突起 Reference Signs List 20 injection product 40 injection mold 41 upper mold 42 lower mold 43 cavity 44 runner 45 gate 46 protrusion

フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 45/00 - 45/84 Continuation of front page (58) Field surveyed (Int.Cl. 7 , DB name) B29C 45/00-45/84

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 上部金型と下部金型とが相互に結合され
てその中央にキャビティーが形成されており、前記キャ
ビティーの一側にガス射出成型時に溶融状態のレジンが
急速度でキャビティーに噴射されうるよう、ゲートが狭
く形成された射出金型において、 前記キャビティーには、前記ゲートを通してキャビティ
ー内に一方向へ高速噴射される溶融状態のレジンがゲー
トを通過するとともに、キャビティーに注入される瞬
間、正面衝突により噴射速度が減少されつつ流れが多方
向へ分散されうるよう突起が備えられ、 前記突起は、前記ゲートから噴射される溶融状態のレジ
ンが正面衝突した後、その流れが上部側へ変えられて通
過されうるよう、その上端が前記キャビティーの天井と
所定距離をおいて接触されないように設けられた ことを
特徴とするガス射出成型時のジェッティング防止のため
の射出金型。An upper mold and a lower mold are connected to each other to form a cavity in the center thereof, and a resin in a molten state is rapidly formed on one side of the cavity at the time of gas injection molding. In an injection mold having a narrow gate so that it can be injected into the tee, a molten resin that is injected at a high speed in one direction into the cavity through the gate passes through the gate, and the cavity is formed in the cavity. At the moment of injection into the tee, a projection is provided so that the flow can be dispersed in multiple directions while the injection speed is reduced by a head-on collision , and the projection is a molten state register injected from the gate.
After a head-on collision, the flow is
So that the upper end can be
An injection mold for preventing jetting at the time of gas injection molding, which is provided so as not to be contacted at a predetermined distance . 【請求項２】 前記突起は、前記ゲートから噴射される
溶融状態のレジンが正面衝突した後、その流れが左右方
向へ変えられて容易に分散されうるよう、円柱状に形成
されたことを特徴とする請求項１に記載のガス射出成型
時のジェッティング防止のための射出金型。2. The protrusion is formed in a cylindrical shape so that after a molten resin injected from the gate collides head-on, the flow can be changed in the left-right direction and easily dispersed. 2. An injection mold according to claim 1, for preventing jetting during gas injection molding.
JP10298872A 1997-10-24 1998-10-20 Injection mold to prevent jetting during gas injection molding Expired - Fee Related JP3027148B2 (en)

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KR199754946 1997-10-24
KR1019970054946A KR100248772B1 (en) 1997-10-24 1997-10-24 An injection molder of jeting preventing with gas injection molding

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JPH11192644A JPH11192644A (en) 1999-07-21
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JP4839150B2 (en) * 2005-08-08 2011-12-21 住友化学株式会社 Case for storing solid-state imaging device, manufacturing method thereof, and solid-state imaging device
KR100923666B1 (en) 2009-03-26 2009-10-28 주식회사 세웅 Micro-fuse cover sheet and fabricating method thereof
JP5682085B2 (en) * 2010-11-30 2015-03-11 株式会社吉野工業所 Injection molding method for synthetic resin molded products
CN106142595A (en) * 2015-03-23 2016-11-23 全耐塑料公司 The compression molded method of composite and realize the system of the method
KR102357922B1 (en) * 2018-02-07 2022-02-03 한화에어로스페이스 주식회사 Case for a hot isostatic pressing
KR102620409B1 (en) * 2021-12-13 2024-01-03 한국생산기술연구원 Mold device for oxygen replacing die casting

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NL8120273A (en) * 1981-07-15 1983-06-01 Yamasaki Kojiro METAL SHAPE AND VENTILATION DEVICE THEREFOR.
JPS61244514A (en) * 1985-04-23 1986-10-30 Mitsubishi Plastics Ind Ltd Manufacture of foamed molded article
JPH0353865Y2 (en) * 1986-12-15 1991-11-26
CN1014945B (en) * 1987-02-13 1991-11-27 维迪尔·科勒 Method and machine for automatic measurement of convergence and determination of corrections to be made in trichromatic cathode tube deflectors
CN1011211B (en) * 1987-12-26 1991-01-16 承德市电子仪器厂 Built-up plastics mould
DE4102319C2 (en) * 1990-01-30 1994-12-01 Toyoda Gosei Kk Method and device for molding hollow bodies
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KR970028093U (en) * 1995-12-23 1997-07-24 Injection Molding Flow Control Device of Mold Mold
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CN1215654A (en) 1999-05-05
KR100248772B1 (en) 2000-03-15
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JPH11192644A (en) 1999-07-21
ES2149113A1 (en) 2000-10-16
KR19990033561A (en) 1999-05-15

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