JPH04182106A - Method and device of injection compression molding - Google Patents
Method and device of injection compression moldingInfo
- Publication number
- JPH04182106A JPH04182106A JP30884590A JP30884590A JPH04182106A JP H04182106 A JPH04182106 A JP H04182106A JP 30884590 A JP30884590 A JP 30884590A JP 30884590 A JP30884590 A JP 30884590A JP H04182106 A JPH04182106 A JP H04182106A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- cavity
- gas
- molten resin
- resin
- 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 claims abstract description 33
- 239000007924 injection Substances 0.000 title claims abstract description 33
- 238000000748 compression moulding Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 6
- 239000011347 resin Substances 0.000 claims abstract description 48
- 229920005989 resin Polymers 0.000 claims abstract description 48
- 241000283153 Cetacea Species 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 50
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel 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
- B29C45/1703—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
- B29C45/1705—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 using movable 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)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、射出圧縮成形方法及び装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an injection compression molding method and apparatus.
（ロ）従来の技術
従来の射出圧縮成形装置として、たと疋ば特開昭６１−
２８３５２０号公報に示されるらのがある。 これに示
される射出圧縮成形装置て゛は、型締装置の固定盤及び
可動盤にそれぞれ固定金型及び可動金型を取り付け、型
閉時に固定金型及び可動金型のそれぞれ凸部及び凹部が
はまり合ってはいるが、完全には密着していない状態、
すなわち両金型のパーティング面間にすき間がある型閉
途中の状態て型閉をいったん停止し、この停止状態で射
出を行い、次いで更に可動盤を前進させて型締を行うこ
とにより成形品を圧縮する。 これによりひずみが少な
く形状精度の高い成形品を得ることができる。(b) Conventional technology As a conventional injection compression molding device, there is
There are those shown in Japanese Patent No. 283520. In the injection compression molding apparatus shown in this figure, a fixed mold and a movable mold are respectively attached to a fixed plate and a movable plate of a mold clamping device, and when the mold is closed, the protrusions and recesses of the fixed mold and the movable mold fit into each other. but not completely adhered,
In other words, when the mold is in the middle of closing with a gap between the parting surfaces of both molds, the mold closing is temporarily stopped, injection is performed in this stopped state, and then the movable platen is further advanced to clamp the mold, thereby forming the molded product. Compress. As a result, a molded product with less distortion and high shape accuracy can be obtained.
（ハ）発明が解決しようとする課題
しかしながら、上記のような従来の射出圧縮成形装置で
は、通常の樹脂を用いて内部に樹脂がつまった、中実状
の成形品を成形したり、発泡性樹脂を用いて内部に多数
のあわ状の空気が入った、多孔質の成形品を成形したり
することはできるが、中空状の成形品を製造することは
できないとい６問題点がある。(c) Problems to be Solved by the Invention However, conventional injection compression molding equipment as described above does not mold solid molded products filled with resin using ordinary resin, or Although it is possible to mold porous molded products with a large number of air bubbles inside, there are six problems in that it is impossible to produce hollow molded products.
本発明はこのような課題を解決することを目的としてい
る。The present invention aims to solve these problems.
（ニ）課題を解決するための手段
本発明は、型閉完了前の金型１４．１６のキャビティＣ
内に溶融樹脂３０を固まり状になるように射出し、前記
溶融樹脂３０の内部に気体を注入して風船状のパリソン
３０ａを形成し、この気体の注入中又は注入後に型締を
行うことによって、前記パリソン３０ａを圧縮して成形
品３０ｂを成形する射出圧縮成形方法において、気体導
入管２０を、気体注入時には前記キャビティＣ内の前記
溶融樹脂３０中央部付近に突出させ、気体注入後は後退
させることにより、上記問題を解決している。(d) Means for Solving the Problems The present invention provides a means for solving the problems by
By injecting the molten resin 30 into a lump inside the molten resin 30, injecting gas into the inside of the molten resin 30 to form a balloon-shaped parison 30a, and performing mold clamping during or after the injection of the gas. In the injection compression molding method of compressing the parison 30a to mold the molded article 30b, the gas introduction pipe 20 is made to protrude near the center of the molten resin 30 in the cavity C when the gas is injected, and is retracted after the gas is injected. By doing so, the above problem is solved.
更に、雄型１４と雌型１６とを有しており、前記雄型１
４又は前記雌型１６にこれを通ってキャビティＣの壁の
一部を構成する壁面に開口する樹脂道１１＠ １８が形
成されており、前記雄型１４又は前記雌型１６にこれを
通って前記キャビティＣの壁め一部を構成する壁面を貫
通し前記キャヒティＣ内に伸びた気体噴出口２０ａを有
する気体導入管２０が形成されている射出圧縮成形装置
において、前記気体導入管２ｏは前記気体噴出口２０ａ
と気体通路２０ｂより形成されており、前記気体導入管
２０を進退動させる気体導入管駆動装置２１．２２を有
することによっても、更に、気体注入後の後退時におい
て、前記気体導入管２ｏ先端面と前記キャビティＣ面が
同一面となって前記気体噴出口２０ａが閉鎖されること
によっても、上記問題点を解決する。Furthermore, it has a male mold 14 and a female mold 16, and the male mold 1
4 or the female mold 16 is formed with a resin channel 11 @ 18 that passes through this and opens to a wall surface that constitutes a part of the wall of the cavity C. In an injection compression molding apparatus in which a gas introduction pipe 20 is formed, the gas introduction pipe 20 having a gas jet port 20a penetrating a wall surface constituting a part of the wall of the cavity C and extending into the cavity C, the gas introduction pipe 2o is Gas outlet 20a
and a gas passage 20b, and also by having a gas introduction tube driving device 21, 22 for moving the gas introduction tube 20 forward and backward, when retracting after gas injection, the tip surface of the gas introduction tube 2o The above-mentioned problem can also be solved by making the cavity C surface the same surface and closing the gas jet port 20a.
（ホ）作用
型閉する前のキャビティ内に溶融樹脂を固まり状になる
ように射出する。 この間まりの中央部付近に気体導入
管を突出させ、空気などの気体を所定量注入する。 こ
れにより溶融樹脂は、風船状に膨れたパリソンとなる。(e) Inject the molten resin into a lump into the cavity before closing the working mold. A gas introduction pipe is made to protrude near the center of this space, and a predetermined amount of gas such as air is injected. As a result, the molten resin becomes a balloon-shaped parison.
気体注入後は気体導入管を後退させ、気体導入管先端
面とキャビテイ面が同一面になった状態で型締めを行っ
て、パリソンを圧縮成形する。 金型を冷却した後、こ
れ含開く。 こうすることによって、中空状の成形品を
製造することかできる。After the gas is injected, the gas introduction tube is moved back, and the mold is clamped with the end surface of the gas introduction tube and the cavity surface flush with each other, and the parison is compression molded. After the mold has cooled, it is opened. By doing so, it is possible to manufacture a hollow molded product.
（へ）実施例
以下、本発明の実施例を図面に基づいて詳細に説明する
。(F) Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
第１図〜第４図に本発明の実施例を示す。 型締装置の
固定盤１０と可動盤１２とが互いに対面する状態で設け
られている。 可動盤１２は図示してない型締シリンダ
によって固定盤１ｏに近づく方向及びこれから遠ざがる
方向に移動可能である。 固定盤１０には雄型１４が取
り付けられ、また可動盤１２には雌型１６が取り付けら
れている。 雄型１４は、２つの段付き凸部を有する柱
状に形成されている。 雌型１６は、断面が「凹」字形
に形成されている。 雄型１４の中間の外径部は、雌型
１６の筒状の穴にはめ合わせることが可能である。 雌
型１６と雄型１４とがはめ合わされた状態で、両金型１
４及び１６間の空間部によって断面が「３１字状のキャ
ビティＣが形成されるようになっている。 雄型１・１
及び雌型１６のはめ合い部の寸法は、第１図に示す位置
から雌型１６がさらに型閉じ方向に移動したとき、キャ
ビティＣ内の空気を排出することが可能なすき間に選定
されている。Embodiments of the present invention are shown in FIGS. 1 to 4. A fixed platen 10 and a movable platen 12 of the mold clamping device are provided facing each other. The movable platen 12 is movable in the direction toward the fixed platen 1o and in the direction away from the fixed platen 1o by a mold clamping cylinder (not shown). A male die 14 is attached to the fixed platen 10, and a female die 16 is attached to the movable platen 12. The male mold 14 is formed into a columnar shape having two stepped protrusions. The female mold 16 has a "concave" shape in cross section. The middle outer diameter portion of the male mold 14 can be fitted into the cylindrical hole of the female mold 16. With the female mold 16 and the male mold 14 fitted together, both molds 1
The space between 4 and 16 forms a cavity C with a 31-shaped cross section. Male molds 1 and 1
The dimensions of the fitting portion of the female mold 16 are selected to provide a gap that allows air in the cavity C to be discharged when the female mold 16 is further moved in the mold closing direction from the position shown in FIG. .
雄型１４には、キャビティＣに開口する樹脂通路１８が
形成されている。 すなわち樹脂通路１８は、雄型１４
の図中左側の壁面より金型中央部へ向けて設けられ、途
中で上方に曲がりこれの上側の面の中央部に開口してい
る。 キャビティＣには、図示してない射出装置から樹
脂通路１８を通って溶融樹脂を射出することが可能であ
る。A resin passage 18 that opens into the cavity C is formed in the male mold 14 . That is, the resin passage 18 is connected to the male die 14.
It is provided toward the center of the mold from the wall surface on the left side in the figure, curves upward in the middle, and opens at the center of the upper surface. It is possible to inject molten resin into the cavity C through the resin passage 18 from an injection device (not shown).
また雌型１６には、空圧シリンダ２１ピストン２２によ
ってキャビティＣ的溶融樹脂３０中央部に進退可能な気
体導入管２０が形成されている。Further, the female mold 16 is formed with a gas introduction pipe 20 that can be moved forward and backward into the center of the molten resin 30 in the cavity C by means of a pneumatic cylinder 21 and a piston 22.
すなわち気体導入管２０は、雌型１６の図中上側の面と
下側の面とを貫通してキャビティＣの中央部まで伸びる
ことが可能となっている。 気体導入管２０の先端面は
、樹脂通路１８の開口部と向かい合う位置に配置されて
いる。 第４図に見られるように、気体導入管２０は気
体噴出口２０ａと気体通路２０ｂより形成されでおり、
気体注入後の後退時において気体導入管２０先端面とキ
ャビティＣ面か同一面となって気体噴出口２０ａが閉鎖
される構成になっている。 後述するように、キャビテ
ィＣ内に溶融樹脂３０が固まり状に供給された後、空圧
シリンダ２１のピストン２２の作動で気体導入管２０を
溶融樹脂３０中央部付近に突出させ、図示してない空気
源から気体導入管２０を通り上記溶融樹脂３０内に空気
を供給することが可能である。That is, the gas introduction pipe 20 can extend to the center of the cavity C by penetrating the upper and lower surfaces of the female mold 16 in the figure. The distal end surface of the gas introduction tube 20 is arranged at a position facing the opening of the resin passage 18. As seen in FIG. 4, the gas introduction pipe 20 is formed of a gas outlet 20a and a gas passage 20b.
When retracting after injecting gas, the distal end surface of the gas introduction pipe 20 and the cavity C surface become the same surface, and the gas ejection port 20a is closed. As will be described later, after the molten resin 30 is supplied in the form of a mass into the cavity C, the piston 22 of the pneumatic cylinder 21 is actuated to cause the gas introduction pipe 20 to protrude near the center of the molten resin 30 (not shown). It is possible to supply air from an air source into the molten resin 30 through the gas introduction pipe 20.
次にこの実施例の作用を説明する。 可動盤１２は、第
１図に示す型開の途中位置まて移動した状態でいったん
停止させられる。 次いて図示してない射出装置から溶
融樹脂３０が、樹脂通路１８を通ってキャビティＣに粘
度の高い状態で射出される。 溶融樹脂３０の射出は、
両金型１４．１６が型閉される前に行われるので、射出
圧力は低圧のものとすることができる。 その後、空圧
シリンダ２１のピストン２２の作動により気体導入管２
０を溶融樹脂３０中央部付近に突出させる。Next, the operation of this embodiment will be explained. The movable platen 12 is moved to a position halfway through the mold opening shown in FIG. 1 and then stopped. Next, molten resin 30 is injected in a high viscosity state into the cavity C through the resin passage 18 from an injection device (not shown). Injection of the molten resin 30 is as follows:
Since this is done before both molds 14, 16 are closed, the injection pressure can be low. Thereafter, the piston 22 of the pneumatic cylinder 21 operates to cause the gas introduction pipe 2 to
0 is made to protrude near the center of the molten resin 30.
これにより溶融樹脂３０は、気体導入管２０の気体噴出
口２０ａを包み込んだ固まり状となる。As a result, the molten resin 30 becomes a lump that surrounds the gas outlet 20a of the gas introduction pipe 20.
次に、図示してない空気源から気体導入管２０を通り気
体噴出口２０ａから溶融樹脂３０内に所定量の空気が吹
き込まれる。 これにより溶融樹脂３０は、第２図に示
すように、中に空気が入った風船状のパリソン３０ａと
される。 空気の注入終了後、気体導入管２０を後退さ
せ、気体導入管２０先端面とキャビティＣ面が同一面に
なると、再び可動盤１２を駆動して、第３図に示すよう
に型締を行う。 これによりパリソン３０ａは、断面が
「３１字状をした中空の成形品３０ｂとされる。 両金
型１４．１６を冷却して、可動盤１２を型開方向に移動
させて可動金型１６を開き、成形品３０ｂを取り出す。Next, a predetermined amount of air is blown into the molten resin 30 from an air source (not shown) through the gas introduction pipe 20 and from the gas outlet 20a. As a result, the molten resin 30 is formed into a balloon-shaped parison 30a filled with air, as shown in FIG. After the air injection is completed, the gas introduction pipe 20 is moved back, and when the end surface of the gas introduction pipe 20 and the cavity C surface are on the same plane, the movable platen 12 is driven again to perform mold clamping as shown in Fig. 3. . As a result, the parison 30a is made into a hollow molded product 30b with a 31-shaped cross section. Both molds 14 and 16 are cooled, and the movable mold 16 is moved by moving the movable platen 12 in the mold opening direction. Open it and take out the molded product 30b.
以上のような方法によって、風船状のパリソン３０ａを
キャビティＣに合わせて圧縮成形するので、肉厚の均一
な中空成形品を製造することができる。By the method described above, the balloon-shaped parison 30a is compression-molded to fit the cavity C, so that a hollow molded product with a uniform wall thickness can be manufactured.
なお、上記説明では、雄型１４に樹脂通路１８を設け、
雌型１６に気体導入管２０を設けるものとしたが、これ
らは互いに逆の配置としてもよい。In addition, in the above description, the resin passage 18 is provided in the male die 14,
Although the female mold 16 is provided with the gas introduction pipe 20, these may be arranged in opposite directions.
また、樹脂通路１８及び気体導入管２０を一方の金型、
たとえば固定金型１４に設けるようにして、たとえば相
手側の雌型１６にはなにも設けないようにしてもよい。In addition, the resin passage 18 and the gas introduction pipe 20 are placed in one mold,
For example, it may be provided on the fixed mold 14 and not provided on the female mold 16 on the other side, for example.
また、上記説明では、可動盤１２を型開の途中位置で停
止させて溶融樹脂３０の射出を行うものとしたが、可動
盤１２を停止させないで、微速で型閉方向に移動中に溶
融樹脂３０の射出を行うようにすることもできる。In addition, in the above explanation, the movable platen 12 is stopped in the middle of mold opening to inject the molten resin 30, but the movable platen 12 is not stopped and the molten resin is injected while moving at a very slow speed in the mold closing direction. It is also possible to perform 30 injections.
さらに、空気の注入は、溶！！樹脂３０の射出終了後に
行うものとしたが、溶融樹脂３０の射出途中から空気の
注入を開始するようにすることもできる。Furthermore, air injection melts! ! Although the injection of air is performed after the injection of the resin 30 is completed, it is also possible to start the injection of air during the injection of the molten resin 30.
なお、空気の注入は、型締前に終了するものとしたが、
圧縮成形中又は冷却中に空気の注入を続けるようにする
こともできる。Note that the air injection was supposed to end before mold clamping, but
It is also possible to continue injecting air during compression molding or cooling.
また、上記説明では、溶融樹脂３０内に注入する気体と
して空気を用いるものとしたが、空気Ｌブ外の気体、た
と疋ば窒素を用いるようにすることもできる。Further, in the above description, air is used as the gas injected into the molten resin 30, but a gas other than the air L, for example nitrogen, may also be used.
（ト）発明の詳細
な説明してきたように、本発明によれば、１ 均一な肉
厚の中空成形品を製造することができる。(G) As described in detail, according to the present invention, 1. A hollow molded product with uniform wall thickness can be manufactured.
２、成形品に薄肉部やリブの部分があっても、これらの
部分を確実に中空のものとすることができる。2. Even if the molded product has thin-walled parts or ribbed parts, these parts can be reliably made hollow.
３ 型閉前のキャビティ内に溶融樹脂を注入するので、
射出圧力は低圧でよく、装置を安価なものとすることが
できる。3. Molten resin is injected into the cavity before the mold is closed, so
The injection pressure may be low, and the device can be made inexpensive.
４、成形品内部には冷却、固定するまで気体圧力が作用
しているために、ヒゲのない良好な表面の成形品が得ら
れる。4. Since gas pressure is applied to the inside of the molded product until it is cooled and fixed, a molded product with a good surface without whiskers can be obtained.
５ 気体導入管の痕が残らない。5. No traces of the gas introduction tube remain.
等の効果が得られる。Effects such as this can be obtained.
第１図は本発明の実施例の射出圧縮装置の断面図で、第
２図は気体の注入を完了した状態を示す図で、第３図は
圧縮成形を完了した状態を示す図で・、第４図は気体導
入管の拡大図である。
１０ ・固定盤 、１２・ ・可動盤、１４ ・ 雄
型、 １６ 雌型、 １８樹脂通路、 ２０・・
気体導入管、 ２０ａ・ ・気体噴出口、 ２０ｂ・
・・気体通路、２１ ・・空圧シリンダ、 ２２・
ピストン、３０ ・・溶融樹脂、 ３０ａ パ
リソン、３０ｂ 成形品、 Ｃキャピテイ。
特許出願人 株式会社 日本製鋼所
代表者 八木直彦
第１図
第２図
第３図
第４図Fig. 1 is a sectional view of an injection compression device according to an embodiment of the present invention, Fig. 2 is a view showing a state in which gas injection has been completed, and Fig. 3 is a view showing a state in which compression molding has been completed. FIG. 4 is an enlarged view of the gas introduction pipe. 10 - Fixed plate, 12 - Movable plate, 14 - Male type, 16 Female type, 18 Resin passage, 20...
Gas introduction pipe, 20a・・Gas outlet, 20b・
・・Gas passage, 21 ・・Pneumatic cylinder, 22・
Piston, 30... Molten resin, 30a Parison, 30b Molded product, C capity. Patent applicant: Japan Steel Works, Ltd. Representative: Naohiko YagiFigure 1Figure 2Figure 3Figure 4
Claims (1)
）内に溶融樹脂（３０）を固まり状になるように射出し
、前記溶融樹脂（３０）の内部に気体を注入して風船状
のパリソン（３０ａ）を形成し、この気体の注入中又は
注入後に型締を行うことによって、前記パリソン（３０
ａ）を圧縮して成形品（３０ｂ）を成形する射出圧縮成
形方法において、 気体導入管（２０）を、気体注入時には前記キャビティ
（Ｃ）内の前記溶融樹脂（３０）中央部付近に突出させ
、気体注入後は後退させることを特徴とするプレス成形
方法。 ２、雄型（１４）と雌型（１６）とを有しており、前記
雄型（１４）又は前記雌型（１６）にこれを通ってキャ
ビティ（Ｃ）の壁の一部を構成する壁面に開口する樹脂
通路（１８）が形成されており、前記雄型（１４）又は
前記雌型（１６）にこれを通つて前記キャビティ（Ｃ）
の壁の一部を構成する壁面を貫通し前記キャビティ（Ｃ
）内に伸びた気体噴出口（２０ａ）を有する気体導入管
（２０）が形成されている射出圧縮成形装置において、
前記気体導入管（２０）は前記気体噴出口（２０ａ）と
気体通路（２０ｂ）より形成されており、前記気体導入
管（２０）を進退動させる気体導入管駆動装置（２１、
２２）を有することを特徴とする射出圧縮成形装置。 ３、気体注入後の後退時において、前記気体導入管（２
０）先端面と前記キャビティ（Ｃ）面が同一面となって
前記気体噴出口（２０ａ）が閉鎖されることを特徴とす
る請求項２記載の射出圧縮成形装置。[Claims] 1. Cavity (C) of the mold (14, 16) before completion of mold closing
), the molten resin (30) is injected into a mass, and a gas is injected into the molten resin (30) to form a balloon-shaped parison (30a). By later performing mold clamping, the parison (30
In the injection compression molding method of compressing a) to mold the molded article (30b), the gas introduction pipe (20) is made to protrude near the center of the molten resin (30) in the cavity (C) when injecting the gas. , a press forming method characterized by retreating after gas injection. 2. It has a male mold (14) and a female mold (16), and passes through the male mold (14) or the female mold (16) to form a part of the wall of the cavity (C). A resin passageway (18) is formed that opens on the wall surface, and the resin passageway (18) is passed through the resin passageway (18) to the male mold (14) or the female mold (16) to form the cavity (C).
The cavity (C
) In an injection compression molding apparatus in which a gas introduction pipe (20) having a gas outlet (20a) extending into the inside is formed,
The gas introduction pipe (20) is formed by the gas outlet (20a) and the gas passage (20b), and includes a gas introduction pipe driving device (21,
22) An injection compression molding apparatus comprising: 3. When retracting after gas injection, the gas introduction pipe (2
0) The injection compression molding apparatus according to claim 2, characterized in that the tip end surface and the cavity (C) surface are flush with each other and the gas jet port (20a) is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30884590A JPH0635138B2 (en) | 1990-11-16 | 1990-11-16 | Injection compression molding method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30884590A JPH0635138B2 (en) | 1990-11-16 | 1990-11-16 | Injection compression molding method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04182106A true JPH04182106A (en) | 1992-06-29 |
| JPH0635138B2 JPH0635138B2 (en) | 1994-05-11 |
Family
ID=17985971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30884590A Expired - Fee Related JPH0635138B2 (en) | 1990-11-16 | 1990-11-16 | Injection compression molding method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0635138B2 (en) |
-
1990
- 1990-11-16 JP JP30884590A patent/JPH0635138B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0635138B2 (en) | 1994-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5110533A (en) | Method for the use of gas assistance in the molding of plastic articles to enhance surface quality | |
| JPS6047086B2 (en) | Method and apparatus for manufacturing objects from plastic material | |
| US4077760A (en) | Injection molding process and apparatus | |
| JP3675864B2 (en) | Blow molding method and apparatus | |
| JPS61254322A (en) | Mold clamping device of injection molder | |
| JPH04182106A (en) | Method and device of injection compression molding | |
| JP2642993B2 (en) | Plastic molding method | |
| CN211031020U (en) | Injection mold structure and mold thereof | |
| JPS5839425A (en) | Low pressure injection molding method | |
| US6146579A (en) | Process for producing thermoplastic resin hollow molded article | |
| CN216068533U (en) | Electric vehicle front wall mold with inclined top submerged pouring structure | |
| JPH10109319A (en) | Injection mold of hollow molded product and molding thereof | |
| CN221695208U (en) | Horizontal die casting machine | |
| JP3684835B2 (en) | Injection molding method | |
| JP2636988B2 (en) | Gas pressure mold | |
| JPH0469224A (en) | Method and apparatus for injection compression molding | |
| JPH09155921A (en) | Molding method of molding having joint and molding die thereof | |
| JPS5814293B2 (en) | How to form a hollow body | |
| JP2917208B2 (en) | Manufacturing method of high hollow injection molded products | |
| JP2874835B2 (en) | Gas injection molding die and gas injection molding method using the same | |
| KR20080029038A (en) | Ejector for plastic injection molding apparatus | |
| JPH07164486A (en) | Mold for molding | |
| JPH04270615A (en) | Manufacture of hollow body | |
| JPS62140819A (en) | Mold for hollow molding | |
| JPH04270616A (en) | Hollow body made of plastic and its mold structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080511 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090511 Year of fee payment: 15 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100511 Year of fee payment: 16 |
|
| LAPS | Cancellation because of no payment of annual fees |