JPH05220792A - Thermosetting resin molding metal die - Google Patents
Thermosetting resin molding metal dieInfo
- Publication number
- JPH05220792A JPH05220792A JP2932292A JP2932292A JPH05220792A JP H05220792 A JPH05220792 A JP H05220792A JP 2932292 A JP2932292 A JP 2932292A JP 2932292 A JP2932292 A JP 2932292A JP H05220792 A JPH05220792 A JP H05220792A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- sprue
- metal die
- molding
- temperature
- 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
- 239000011347 resin Substances 0.000 title claims abstract description 52
- 229920005989 resin Polymers 0.000 title claims abstract description 52
- 238000000465 moulding Methods 0.000 title claims abstract description 34
- 229920001187 thermosetting polymer Polymers 0.000 title claims abstract description 11
- 239000002184 metal Substances 0.000 title abstract 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 240000008042 Zea mays Species 0.000 abstract 4
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 abstract 4
- 235000002017 Zea mays subsp mays Nutrition 0.000 abstract 4
- 235000005822 corn Nutrition 0.000 abstract 4
- 102100027340 Slit homolog 2 protein Human genes 0.000 abstract 2
- 101710133576 Slit homolog 2 protein Proteins 0.000 abstract 2
- 230000001351 cycling effect Effects 0.000 abstract 1
- 238000001746 injection moulding Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000012778 molding material Substances 0.000 description 4
- 238000004904 shortening Methods 0.000 description 3
- 239000004641 Diallyl-phthalate Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002699 waste 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
- B29C45/30—Flow control means disposed within the sprue channel, e.g. "torpedo" construction
-
- 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
- B29C45/30—Flow control means disposed within the sprue channel, e.g. "torpedo" construction
- B29C2045/302—Torpedoes in the sprue channel for heating the melt of cross-linkable material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/10—Thermosetting resins
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱硬化性樹脂射出成形
において、成形サイクルを短縮し、かつ連続成形の安定
性を向上させることを可能とした熱硬化性樹脂の成形金
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 thermosetting resin molding die capable of shortening the molding cycle and improving the stability of continuous molding in thermosetting resin injection molding. is there.
【０００２】[0002]
【従来の技術】熱硬化性樹脂の射出成形において、樹脂
の硬化時間は、その樹脂材料の硬化特性、金型温度、成
形品の形状、大きさによって決まるもので、樹脂を金型
温度まで昇温させる時間と架橋硬化に必要な時間から成
り立っている。後者は材料の硬化特性にもよるが、比較
的短く、前者の材料の熱伝導率が比較的低いことによる
加熱昇温時間が、硬化時間を支配しているといえる。従
って硬化時間の短縮即ち成形サイクルの短縮のためには
材料の加熱昇温時間を短縮させることが合理的であり、
従来から各種手法が提案され実用化されている。2. Description of the Related Art In injection molding of thermosetting resin, the curing time of the resin is determined by the curing characteristics of the resin material, the mold temperature, the shape and size of the molded product, and the resin is heated to the mold temperature. It consists of the time required for heating and the time required for crosslinking and curing. Although the latter depends on the curing characteristics of the material, it is relatively short, and it can be said that the heating and heating time due to the relatively low thermal conductivity of the former material controls the curing time. Therefore, in order to shorten the curing time, that is, the molding cycle, it is rational to shorten the heating and heating time of the material.
Various techniques have been proposed and put to practical use.
【０００３】このような観点から成形サイクル時間を短
縮させる代表的な金型としてホットコーン型金型があ
る。ホットコーン型金型については、「Plastics Techno
logy」27巻、5号、67〜69頁(1981年５月発行）に詳細に
記載されている。要約すると、図３に示されるように、
ホットコーン型金型（Ａ）は、スプルー（１）をコーン
（３）とスリーブ（５）との間で中空円錐形状とし、溶
融樹脂流路を薄いスリット形状（２）とする。そしてコ
ーン（３）を金型本体の温度に比しより高温度に制御す
ることによりスリット部（２）を通過する樹脂温度を急
速に昇温させることを利用して成形サイクル時間を短縮
させる金型である。（６）はランナー、（７）はキャビ
ティである。From this point of view, there is a hot-cone mold as a typical mold for shortening the molding cycle time. For information on hot cone molds, see Plastics Techno
logy, Vol. 27, No. 5, pp. 67-69 (published May 1981). In summary, as shown in FIG.
In the hot cone mold (A), the sprue (1) has a hollow cone shape between the cone (3) and the sleeve (5), and the molten resin flow path has a thin slit shape (2). Then, by controlling the cone (3) to a temperature higher than that of the mold body, the temperature of the resin passing through the slit portion (2) is rapidly increased, thereby shortening the molding cycle time. It is a type. (6) is a runner and (7) is a cavity.
【０００４】しかしながら、このホットコーン型金型で
は、スプルーの樹脂注入部（４）の樹脂が肉厚となり、
硬化時間短縮の障害になること、スプルー部全体の高温
度制御は射出成形機の先端部で樹脂の硬化によるノズル
詰りを発生させ、連続成形の信頼性を低下させる原因と
なっている。また、スプルー部の容積が大きいが、この
ことは樹脂材料のロスの割合が大きくなり好ましくな
い。However, in this hot cone mold, the resin in the resin injection portion (4) of the sprue becomes thick,
It becomes an obstacle to shorten the curing time, and the high temperature control of the entire sprue part causes nozzle clogging at the tip of the injection molding machine due to the curing of the resin, which causes a decrease in the reliability of continuous molding. Further, the volume of the sprue portion is large, but this is not preferable because the ratio of loss of the resin material becomes large.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的はホット
コーン型成形金型で得られる特長を失うことなく、連続
成形の安定性を向上させ、適用しうる樹脂を拡大し、汎
用性を付与した熱硬化性樹脂成形金型を提供することに
ある。The object of the present invention is to improve the stability of continuous molding, expand the resins that can be applied, and impart versatility without losing the features obtained by the hot cone molding die. The present invention is to provide a thermosetting resin molding die.
【０００６】[0006]
【課題を解決するための手段】本発明は、ホットコーン
型金型を有する熱硬化性樹脂成形金型において、ホット
コーン型金型のスプルーの樹脂注入部に、金型本体とは
独立して温度制御を可能にしたブッシュ構造のスプルー
を取り付けてなることを特徴とする熱硬化性樹脂成形金
型である。SUMMARY OF THE INVENTION The present invention is a thermosetting resin molding die having a hot cone die, wherein the resin injection portion of the sprue of the hot cone die is independent of the die body. A thermosetting resin molding die, characterized in that a sprue having a bush structure that enables temperature control is attached.
【０００７】本発明は、熱硬化性樹脂成形用ホットコー
ン型金型を改良し、このスプルーの樹脂注入部にブッシ
ュ構造のスプルーを取付けたもので、以下図面に従って
詳細に説明する。図１は本発明の成形金型で、Ａはホッ
トコーン型金型、Ｂはブッシュ構造のスプルー（以下、
スプルーブッシュという）である。ホットコーン型金型
は基本的には前述の通りの構造でよいが、スプルーブッ
シュが取付られるので、スプルー（１）の肉厚部を実質
的になくすることができる。スプルーブッシュは中央に
溶融樹脂の流路（１１）を有し、その外側に温水等の熱
媒体を通す熱媒体流路（１２）が設けられている。この
熱媒体により溶融樹脂の温度を樹脂が一定時間硬化しな
い所定温度に制御する。この所定温度は樹脂の硬化特
性、流動特性により決定されるが、通常は100〜120℃で
ある。The present invention is an improvement of a hot cone type mold for thermosetting resin molding, in which a sprue having a bush structure is attached to a resin injection portion of this sprue, which will be described in detail below with reference to the drawings. FIG. 1 shows a molding die of the present invention, where A is a hot cone die and B is a sprue having a bush structure (hereinafter,
It is called Sprue Bush). The hot cone mold may basically have the structure as described above, but since the sprue bush is attached, the thick portion of the sprue (1) can be substantially eliminated. The sprue bush has a flow path (11) for molten resin in the center, and a heat medium flow path (12) for passing a heat medium such as hot water is provided outside the flow path (11). The heat medium controls the temperature of the molten resin to a predetermined temperature at which the resin does not cure for a certain period of time. This predetermined temperature is determined by the curing characteristics and flow characteristics of the resin, but is usually 100 to 120 ° C.
【０００８】このスプルーブッシュにより、高温度に制
御されているホットコーン型金型から射出成形機のノズ
ル側への伝熱を遮断し、樹脂の硬化によるノズル詰りを
防止するとともに、スプルーブッシュ部分を所定温度に
制御することにより、この部分の樹脂の硬化も防止して
連続成形の信頼性を向上させることができる。なお、ホ
ットコーン型金型とスプルーブッシュとの断熱を良好に
維持するためには、それらの接合部（１３）にステンレ
ス板、積層板、テフロン板等の比較的熱伝導性の低い材
料を介在させることが好ましい。With this sprue bush, heat transfer from the hot cone type mold controlled to a high temperature to the nozzle side of the injection molding machine is blocked, nozzle clogging due to resin hardening is prevented, and the sprue bush part is removed. By controlling the temperature to a predetermined temperature, it is possible to prevent hardening of the resin in this portion and improve the reliability of continuous molding. In order to maintain good heat insulation between the hot cone mold and the sprue bush, a material having a relatively low thermal conductivity such as a stainless plate, a laminated plate or a Teflon plate is interposed at the joint (13) between them. Preferably.
【０００９】次に、成形時、樹脂の硬化が完了し、金型
を開放する時には、図２に示すように、ホットコーン型
金型のコーン（３）と、スプルーブッシュ及びホットコ
ーン型金型のスリーブ（５）との間で型開きすることに
より、スプルーブッシュ内の溶融樹脂（１４）と、ホッ
トコーン型金型内の硬化した樹脂（１５）の頭頂部（１
６）との間で破断される。ブッシュ構造内の溶融樹脂は
次回の成形時にランナー（６）を通じて金型キャビティ
（７）に射出され、成形品となる。従来は、１回の成形
毎に廃棄されていたスプルー肉厚部の樹脂が無駄なく使
用されるので、成形１回当たりの射出樹脂量を節減する
ことができる。この節減量は通常２〜１０％程度であ
る。Next, at the time of molding, when the curing of the resin is completed and the mold is opened, as shown in FIG. 2, the cone (3) of the hot cone type mold, the sprue bush and the hot cone type mold are shown. Of the molten resin (14) in the sprue bush and the hardened resin (15) in the hot cone mold (1) by opening the mold (1) with the sleeve (5).
It is broken between 6). The molten resin in the bush structure is injected into the mold cavity (7) through the runner (6) at the next molding, and becomes a molded product. Conventionally, since the resin in the thick portion of the sprue, which has been discarded after each molding, is used without waste, it is possible to reduce the injection resin amount per molding. This savings is usually about 2-10%.
【００１０】[0010]
【作用】本発明において、ホットコーン型金型に取り付
けられるスプルーブッシュは熱媒体流路が設けられ、こ
れを流れる熱媒体により樹脂が一定時間硬化しない所定
温度に制御される。この温度制御は正確に行いうるので
ホットコーン型金型のスリーブ（この部分の温度は成形
温度 ─通常170〜180℃─ とほぼ同じである）の熱によ
るスプルーブッシュ内の溶融樹脂の硬化が防止でき、連
続成形性が格段に向上する。前述のように、ホットコー
ン型金型とスプルーブッシュとの接合面に断熱材料を介
在させれば熱の遮断がより有効に行われ、連続成形の安
定性、信頼性が一層向上する。In the present invention, the sprue bush attached to the hot cone mold is provided with a heat medium passage, and the heat medium flowing through the sprue bush is controlled to a predetermined temperature at which the resin does not cure for a certain period of time. Since this temperature control can be performed accurately, the hardening of the molten resin in the sprue bush due to the heat of the sleeve of the hot cone mold (the temperature of this part is almost the same as the molding temperature-usually 170 to 180 ° C) is prevented. The continuous moldability is remarkably improved. As described above, if a heat insulating material is interposed at the joint surface between the hot cone mold and the sprue bush, the heat can be blocked more effectively, and the stability and reliability of continuous molding can be further improved.
【００１１】[0011]
【実施例】次に、本発明の成形金型を使用して、 フェノール樹脂成形材料でマグネットスイッチケー
ス（成形品重量８２ｇ、２個取り）の射出成形、及び ジアリルフタレート樹脂成形材料でコネクター（成
形品重量４０ｇ、４個取り）の射出成形を行った。 比較のために、通常のスプルー金型による方法（通常
法）、及びホットコーン型金型を使用した従来法（ホッ
トコーン法）についても行った。成形条件、及び連続成
形性、成形材料節減率などを表１に示す。EXAMPLE Next, using the molding die of the present invention, injection molding of a magnet switch case (molded product weight: 82 g, 2 pieces) was made with a phenol resin molding material, and a connector (molded with a diallyl phthalate resin molding material). Injection molding was performed with a product weight of 40 g and four pieces taken. For comparison, a method using a normal sprue mold (normal method) and a conventional method using a hot cone mold (hot cone method) were also performed. Table 1 shows molding conditions, continuous moldability, molding material saving rate, and the like.
【００１２】[0012]
【表１】 [Table 1]
【００１３】この結果から明らかなように、成形サイク
ルが短縮されていることはもちろんであるが、連続成形
性がすぐれ、成形材料の節減を図ることができる。As is clear from this result, it goes without saying that the molding cycle is shortened, but the continuous moldability is excellent and the molding material can be saved.
【００１４】[0014]
【発明の効果】本発明の成形金型は、高温度に制御され
たホットコーン型金型に樹脂硬化温度以下に制御したス
プルーブッシュを取り付けた金型構造であるので、成形
サイクルが短縮されるとともに、長時間の連続成形性も
良好であり、樹脂の節減も図ることができる。The molding die of the present invention has a mold structure in which a hot cone mold controlled to a high temperature and a sprue bush controlled to a resin curing temperature or lower is attached to the molding mold, so that the molding cycle is shortened. At the same time, the continuous moldability for a long time is good, and the resin can be saved.
【図１】本発明の成形金型の断面図。FIG. 1 is a sectional view of a molding die of the present invention.
【図２】本発明の成形金型を使用して成形し、型開きし
た状態の金型の断面図。FIG. 2 is a cross-sectional view of a mold that has been molded using the molding mold of the present invention and has been opened.
【図３】従来のホットコーン型金型の断面図。FIG. 3 is a sectional view of a conventional hot cone mold.
Ａ ホットコーン型金型 Ｂ スプルーブッシュ １ スプルー ２ スリット部 ３ コーン ４ 樹脂注入部 ５ スリーブ ６ ランナー ７ キャビティ １１ 樹脂流路 １２ 熱媒体流路 １３ 接合部 １４ 溶融樹脂 １５ 硬化樹脂 １６ 頭頂部 A hot cone type mold B sprue bush 1 sprue 2 slit part 3 cone 4 resin injection part 5 sleeve 6 runner 7 cavity 11 resin flow path 12 heat medium flow path 13 joint part 14 molten resin 15 cured resin 16 top part
Claims (1)
脂成形金型において、ホットコーン型金型のスプルーの
樹脂注入部に、金型本体とは独立して温度制御を可能に
したブッシュ構造のスプルーを取り付けてなることを特
徴とする熱硬化性樹脂成形金型。1. A thermosetting resin molding die having a hot-cone mold, wherein a bush structure is provided in the resin injection portion of the sprue of the hot-cone mold so that the temperature can be controlled independently of the mold body. A thermosetting resin molding die, characterized in that the sprue is attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2932292A JPH05220792A (en) | 1992-02-17 | 1992-02-17 | Thermosetting resin molding metal die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2932292A JPH05220792A (en) | 1992-02-17 | 1992-02-17 | Thermosetting resin molding metal die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05220792A true JPH05220792A (en) | 1993-08-31 |
Family
ID=12272995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2932292A Pending JPH05220792A (en) | 1992-02-17 | 1992-02-17 | Thermosetting resin molding metal die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05220792A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1407870A1 (en) * | 2002-10-09 | 2004-04-14 | Bakelite AG | Hot-cone molding device for cross-linkable polymers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56139941A (en) * | 1980-04-04 | 1981-10-31 | Fuji Electric Co Ltd | Mold |
| JPS58132171A (en) * | 1982-02-01 | 1983-08-06 | 帝人株式会社 | Treatment of polyester molded product |
-
1992
- 1992-02-17 JP JP2932292A patent/JPH05220792A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56139941A (en) * | 1980-04-04 | 1981-10-31 | Fuji Electric Co Ltd | Mold |
| JPS58132171A (en) * | 1982-02-01 | 1983-08-06 | 帝人株式会社 | Treatment of polyester molded product |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1407870A1 (en) * | 2002-10-09 | 2004-04-14 | Bakelite AG | Hot-cone molding device for cross-linkable polymers |
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