JPH06328489A - Method and apparatus for injection press molding - Google Patents
Method and apparatus for injection press moldingInfo
- Publication number
- JPH06328489A JPH06328489A JP12134493A JP12134493A JPH06328489A JP H06328489 A JPH06328489 A JP H06328489A JP 12134493 A JP12134493 A JP 12134493A JP 12134493 A JP12134493 A JP 12134493A JP H06328489 A JPH06328489 A JP H06328489A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- cavity
- molten resin
- core
- press 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
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
- B29C45/561—Injection-compression moulding
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、射出プレス成形方法に
関し、特に、キャビティ内の溶融樹脂に対して加振する
ことにより、各型によるプレス力の増大化及び樹脂の流
動化を促進させ、小さいプレス力で大きい成形品の成形
を行うための新規な改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection press molding method, and in particular, by vibrating a molten resin in a cavity, the press force of each mold is increased and the fluidization of the resin is promoted. The present invention relates to a new improvement for molding a large molded product with a small pressing force.
【０００２】[0002]
【従来の技術】従来、用いられていたこの種の射出プレ
ス成形方法としては、一般に、固定盤に設けられたキャ
ビティ型取付部のキャビティ型に対して、可動盤に設け
られたコア型取付部のコア型を移動させ、そのプレス力
によって、各型間のキャビティ内に射出された溶融樹脂
の成形を行っていた。2. Description of the Related Art As a conventional injection press molding method of this type, a core mold mounting portion provided on a movable plate is generally used with respect to a cavity mold mounting portion provided on a fixed plate. The core mold was moved, and the pressing force was used to mold the molten resin injected into the cavity between the molds.
【０００３】[0003]
【発明が解決しようとする課題】従来の射出プレス成形
方法は、以上のように構成されていたため、次のような
課題が存在していた。すなわち、少し型開されたキャビ
ティ内に射出された溶融樹脂は、型締め力により押し拡
げられる間に、各型により冷却され徐々に固化するた
め、溶融樹脂の流れ性が悪くなり、キャビティ内の広い
範囲に均一に拡がることが難しく、大きい成形品を得る
ことが困難であった。また、可動盤と固定盤間の型締め
力を強くしなければならないため、強力な型締手段を必
要とし、全体形状も大きくならざるを得ず、小型化の要
求には応じることが不可能であった。Since the conventional injection press molding method is configured as described above, there have been the following problems. That is, the molten resin injected into the cavity opened a little is cooled and gradually solidified by each mold while being spread by the mold clamping force, so the flowability of the molten resin deteriorates and It was difficult to spread uniformly over a wide range, and it was difficult to obtain a large molded product. In addition, since the mold clamping force between the movable platen and the fixed platen must be increased, strong mold clamping means is required, and the overall shape must be increased, making it impossible to meet the demands for downsizing. Met.
【０００４】本発明は以上のような課題を解決するため
になされたもので、特に、キャビティ内の溶融樹脂に対
して加振することにより、各型によるプレス力の増大化
及び樹脂の流動化を促進させ、小さいプレス力で大きい
成形品の成形を行うようにした射出プレス成形方法及び
装置を提供することを目的とする。The present invention has been made to solve the above problems, and in particular, by vibrating the molten resin in the cavity, the pressing force by each mold is increased and the resin is fluidized. It is an object of the present invention to provide an injection press molding method and apparatus that accelerates molding and molds a large molded product with a small pressing force.
【０００５】[0005]
【課題を解決するための手段】本発明による射出プレス
成形方法は、キャビティ型に対してコア型を移動させ、
前記キャビティ型及びコア型間に形成されたキャビティ
内に射出ユニットのノズルから溶融樹脂を射出するよう
にした射出プレス成形方法において、前記溶融樹脂に対
して加振を行うようにした方法である。According to the injection press molding method of the present invention, a core mold is moved with respect to a cavity mold,
In the injection press molding method in which the molten resin is injected from the nozzle of the injection unit into the cavity formed between the cavity mold and the core mold, the molten resin is vibrated.
【０００６】本発明による射出プレス成形装置は、キャ
ビティ型に対してコア型を移動させ、前記キャビティ型
及びコア型間に形成されたキャビティ内に射出ユニット
のノズルから溶融樹脂を射出するようにした射出プレス
装置において、前記キャビティ型を第１弾性体を介して
支持するためのキャビティ型取付部を有する固定盤と、
前記コア型を第２弾性体を介して支持するためのコア型
取付部を有する可動盤と、前記キャビティ型又はコア型
の両方、又は一方を加振するための加振手段とを備えた
構成である。In the injection press molding apparatus according to the present invention, the core mold is moved with respect to the cavity mold, and the molten resin is injected from the nozzle of the injection unit into the cavity formed between the cavity mold and the core mold. In an injection press machine, a stationary platen having a cavity mold mounting portion for supporting the cavity mold through a first elastic body,
A configuration including a movable plate having a core mold mounting portion for supporting the core mold via a second elastic body, and a vibrating means for vibrating both or one of the cavity mold and the core mold. Is.
【０００７】[0007]
【作用】本発明による射出プレス成形方法及び装置にお
いては、可動盤を少し上昇させてコア型を少し型開した
状態で、射出ユニットから溶融樹脂をキャビティ内に射
出し、その後、加振手段を起振させてキャビティ型及び
コア型を加振させて振動させると、溶融樹脂が加振を受
け、この振動を与えつつ可動盤を固定盤に型締する。In the injection press molding method and apparatus according to the present invention, the molten resin is injected from the injection unit into the cavity with the movable platen slightly elevated and the core mold slightly opened, and then the vibrating means is used. When the cavity mold and the core mold are vibrated to vibrate and vibrate, the molten resin is vibrated, and the movable platen is clamped to the fixed platen while giving this vibration.
【０００８】この場合、溶融樹脂へ付加されるプレス力
は、加振に応じて微細に増減しつつ徐々に増加し、キャ
ビティ内の溶融樹脂を広く押し拡げる。また、この加振
作用により各型に接触している溶融樹脂部分が加熱さ
れ、樹脂の流動化を著しく増加させることができる。従
って、可動盤と固定盤間にかける型締め力は小さいプレ
ス力で十分となり、従来と同じ型締め力でも従来よりも
大きい成形品を成形することができる。In this case, the pressing force applied to the molten resin gradually increases with a slight increase or decrease according to the vibration, and widely spreads the molten resin in the cavity. Further, the vibrating action heats the molten resin portion in contact with each mold, and the fluidization of the resin can be significantly increased. Therefore, a small pressing force is sufficient for the mold clamping force applied between the movable platen and the fixed platen, and a molded product larger than the conventional product can be formed even with the same mold clamping force as the conventional product.
【０００９】[0009]
【実施例】以下、図面と共に本発明による射出プレス成
形方法及び装置の好適な実施例について詳細に説明す
る。図１から図３迄は、本発明による射出プレス成形方
法に適用する装置を示すもので、図１は射出時を示す断
面図、図２は型締時を示す断面図、図３は成形完了時を
示す断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the injection press molding method and apparatus according to the present invention will be described in detail below with reference to the drawings. 1 to 3 show an apparatus applied to an injection press molding method according to the present invention. FIG. 1 is a sectional view showing injection, FIG. 2 is sectional view showing mold clamping, and FIG. 3 is completion of molding. It is sectional drawing which shows time.
【００１０】図１において符号１で示されるものはキャ
ビティ型取付部２を型取付具２Ａを介して有する固定盤
であり、このキャビティ型取付部２の取付凹部２ａ内に
は、キャビティ３ａを有するキャビティ型３が内設され
ている。この取付凹部２ａの両側部に形成された第１凹
部２ｂ内にはばね又はゴム等よりなる一対の弾性体４を
介して前記キャビティ型３の両側部に形成された第１支
持突部３ｂが保持されており、このキャビティ型３はこ
の第１弾性体４を介して前記キャビティ型取付部２に作
動自在に設けられている。A reference numeral 1 in FIG. 1 is a fixed plate having a cavity mold mounting portion 2 via a mold mounting tool 2A, and a cavity 3a is provided in a mounting recess 2a of the cavity mold mounting portion 2. The cavity mold 3 is internally provided. In the first recesses 2b formed on both sides of the mounting recess 2a, there are provided first support protrusions 3b formed on both sides of the cavity mold 3 via a pair of elastic bodies 4 made of spring or rubber. The cavity mold 3 is held and is operably provided on the cavity mold mounting portion 2 via the first elastic body 4.
【００１１】前記キャビティ３ａ内にはコア型５が上下
動自在に内設されており、このコア型５の両側部に形成
された第２支持突部５ｂは、可動盤６に型取付具７を介
して固定されたコア型取付部８の両側部に形成された第
２凹部８ｂ内に設けらればね又はゴム等より一対の第２
弾性体９により作動自在な状態で保持されている。な
お、前述の第１，第２弾性体４，９は両方を用いる場合
に限らず何れか一方のみを用いる事もできる。A core die 5 is vertically movably provided inside the cavity 3a, and second support projections 5b formed on both sides of the core die 5 are attached to a movable plate 6 with a die mount 7. A pair of second cores made of spring, rubber or the like provided in second recesses 8b formed on both sides of the core type mounting part 8 fixed via
It is held in an operable state by the elastic body 9. The first and second elastic bodies 4 and 9 described above are not limited to the case of using both, and either one may be used.
【００１２】前記キャビティ型３及びコア型５の下面及
び上面には、一定方向に起振力を生じるように構成され
た周知のリニア振動子からなる第１加振手段１０及び第
２加振手段１１が設けられており、前記キャビティ型取
付部２、第１加振手段１０及びキャビティ型３を貫通し
た状態でＬ字型をなす樹脂ランナー１２が設けられてい
る。この樹脂ランナー１２の先端部１２ａは前記キャビ
ティ３ａ内に連通し、その後端部１２ｂは、射出ユニッ
ト１３のノズル１３ａが当接するように構成されてい
る。なお、前述の各加振手段１０，１１は両方を用いる
場合に限らず、何れか一方のみを用いる事もできる。On the lower surface and the upper surface of the cavity mold 3 and the core mold 5, there are provided a first vibrating means 10 and a second vibrating means composed of known linear vibrators configured to generate an exciting force in a fixed direction. 11 is provided, and an L-shaped resin runner 12 is provided in a state of penetrating the cavity mold mounting portion 2, the first vibrating means 10 and the cavity mold 3. A tip portion 12a of the resin runner 12 communicates with the inside of the cavity 3a, and a rear end portion 12b of the resin runner 12 is configured to abut the nozzle 13a of the injection unit 13. In addition, the above-described respective vibrating means 10 and 11 are not limited to the case of using both, and only one of them can be used.
【００１３】次に動作について述べる。まず可動盤６を
図示しない型締手段及び型開手段を介して少し上昇させ
てコア型５を少し型開した状態で、射出ユニット１３か
ら溶融樹脂をキャビティ３ａ内に射出し、その後、加振
手段１０，１１を起振させてキャビティ型３及びコア型
５を加振させて振動させると、溶融樹脂２０が加振を受
け、この加振を与えつつ可動盤６を固定盤１側に型締す
る（図２に示す）。Next, the operation will be described. First, the movable platen 6 is slightly raised by a mold clamping means and a mold opening means (not shown) to slightly open the core mold 5, injecting a molten resin from the injection unit 13 into the cavity 3a, and then vibrating it. When the cavities 3 and the core mold 5 are vibrated by vibrating the means 10 and 11, the molten resin 20 is vibrated, and the movable platen 6 is moved to the fixed platen 1 side while applying this vibration. Tighten (shown in Figure 2).
【００１４】この場合、溶融樹脂２０へ付加されるプレ
ス力は、加振に応じて微細に増減しつつ徐々に増加し、
キャビティ３ａ内の溶融樹脂２０を広く押し拡げる。ま
た、この加振作用により各型３，５に接触している溶融
樹脂２０部分が加熱され、樹脂の流動化を著しく増加さ
せることができる。従って、可動盤６と固定盤１間にか
ける型締め力は小さいプレス力で十分となり、従来と同
じ型締め力でも従来よりも大きい成形品を成形すること
ができる。また、最終的にキャビティ型３とコア型５の
双方の各弾性体４，９を押し切る（つぶす状態）迄、可
動盤６をプレスし、各加振手段１０，１１の起振を停止
して、図３に示すように成形品２０Ａを得ることができ
る。なお、前述の実施例では加振手段１０，１１を各型
３，５に直接設けた場合について述べたが、例えば、固
定盤１又は可動盤６に設けた場合も前述と同様の作用効
果を得ることができる。In this case, the pressing force applied to the molten resin 20 finely increases or decreases in response to the vibration, and gradually increases,
The molten resin 20 in the cavity 3a is widely spread. Further, this vibrating action heats the portion of the molten resin 20 in contact with each of the molds 3 and 5, so that the fluidization of the resin can be significantly increased. Therefore, a small pressing force is sufficient for the mold clamping force applied between the movable platen 6 and the fixed platen 1, and a molded product larger than the conventional product can be molded even with the same mold clamping force as the conventional one. Further, the movable platen 6 is pressed until the elastic bodies 4 and 9 of both the cavity mold 3 and the core mold 5 are completely pressed (crushed), and the vibrations of the vibrating means 10 and 11 are stopped. A molded product 20A can be obtained as shown in FIG. In the above-described embodiment, the case where the vibrating means 10 and 11 are directly provided on the respective molds 3 and 5 has been described. However, for example, when the vibrating means 10 and 11 are provided on the fixed plate 1 or the movable plate 6, the same operational effects as described above can be obtained. Obtainable.
【００１５】[0015]
【発明の効果】本発明による射出プレス方法及び装置
は、以上のように構成されているため、次のような効果
を得ることができる。すなわち、コア型、キャビティ
型、固定盤及び可動盤の何れかを介して溶融樹脂を加振
するため、この加振により溶融樹脂が拡がると共に、加
振時の発生熱により樹脂の流動化を促進すため、従来と
同じプレス力でもプレス力の増大化となり、小さいプレ
ス力で大きい成形品の成形を行うことができる。Since the injection pressing method and apparatus according to the present invention are configured as described above, the following effects can be obtained. That is, since the molten resin is vibrated through any of the core type, cavity type, fixed platen, and movable platen, the molten resin spreads due to this vibration, and the fluidization of the resin is promoted by the heat generated during the vibration. Therefore, even if the pressing force is the same as the conventional one, the pressing force is increased, and a large molded product can be molded with a small pressing force.
【図１】本発明による射出プレス成形方法を適用した装
置を示す断面図である。FIG. 1 is a sectional view showing an apparatus to which an injection press molding method according to the present invention is applied.
【図２】型締時を示す断面図である。FIG. 2 is a cross-sectional view showing a state during mold clamping.
【図３】成形完了時を示す断面図である。FIG. 3 is a cross-sectional view showing the completion of molding.
１ 固定盤 ２ キャビティ型取付部 ３ キャビティ型 ３ａ キャビティ ４ 第１弾性体 ５ コア型 ６ 可動盤 ８ コア型取付部 ９ 第２弾性体 １０ 第１加振手段 １１ 第２加振手段 １３ 射出ユニット １３ａ ノズル ２０ 溶融樹脂 DESCRIPTION OF SYMBOLS 1 Fixed plate 2 Cavity type mounting part 3 Cavity type 3a Cavity 4 First elastic body 5 Core type 6 Movable plate 8 Core type mounting part 9 Second elastic body 10 First vibrating means 11 Second vibrating means 13 Injection unit 13a Nozzle 20 molten resin
Claims (2)
動させ、前記キャビティ型(3)及びコア型(5)間に形成さ
れたキャビティ(3a)内に射出ユニット(13)のノズル(13
a)から溶融樹脂(20)を射出するようにした射出プレス成
形方法において、前記溶融樹脂(20)に対して加振を行う
ことを特徴とする射出プレス成形方法。1. A core mold (5) is moved with respect to the cavity mold (3), and an injection unit (13) is placed in a cavity (3a) formed between the cavity mold (3) and the core mold (5). Nozzle (13
An injection press molding method in which a molten resin (20) is injected from a), wherein the molten resin (20) is vibrated.
動させ、前記キャビティ型(3)及びコア型(5)間に形成さ
れたキャビティ(3a)内に射出ユニット(13)のノズル(13
a)から溶融樹脂(20)を射出するようにした射出プレス成
形装置において、前記キャビティ型(3)を第１弾性体(4)
を介して支持するためのキャビティ型取付部(2)を有す
る固定盤(1)と、前記コア型(5)を第２弾性体(9)を介し
て支持するためのコア型取付部(8)を有する可動盤(6)
と、前記キャビティ型(3)又はコア型(5)の両方、又は一
方を加振するための加振手段(10又は11)とを備えたこと
を特徴とする射出プレス成形装置。2. A core mold (5) is moved with respect to the cavity mold (3), and an injection unit (13) is placed in a cavity (3a) formed between the cavity mold (3) and the core mold (5). Nozzle (13
In the injection press molding apparatus adapted to inject the molten resin (20) from a), the cavity mold (3) is attached to the first elastic body (4).
A stationary platen (1) having a cavity type mounting portion (2) for supporting the core type mounting portion (8) and a core type mounting portion (8) for supporting the core type (5) via the second elastic body (9). Movable plate (6)
And an oscillating means (10 or 11) for oscillating both or one of the cavity mold (3) and the core mold (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12134493A JPH06328489A (en) | 1993-05-24 | 1993-05-24 | Method and apparatus for injection press molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12134493A JPH06328489A (en) | 1993-05-24 | 1993-05-24 | Method and apparatus for injection press molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06328489A true JPH06328489A (en) | 1994-11-29 |
Family
ID=14808951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12134493A Pending JPH06328489A (en) | 1993-05-24 | 1993-05-24 | Method and apparatus for injection press molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06328489A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1021421C2 (en) * | 2002-09-10 | 2004-03-11 | Fountain Patents B V | Device and method for manufacturing products from a warm plastic mass. |
| KR101234364B1 (en) * | 2009-08-21 | 2013-02-18 | 주식회사 엘지화학 | Apparatus for injection-compression molding by using compression core and the method thereof |
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|---|---|---|---|---|
| JPH0234223B2 (en) * | 1985-07-25 | 1990-08-02 | Pfu Ltd | |
| JPH02293335A (en) * | 1989-05-02 | 1990-12-04 | Asahi Optical Co Ltd | Formation of optical element and forming apparatus therefor |
| JPH03161317A (en) * | 1989-11-21 | 1991-07-11 | Toshiba Corp | Injection compression mold |
| JPH04176623A (en) * | 1990-11-12 | 1992-06-24 | Nachi Fujikoshi Corp | Injection compression molding |
| JPH04263916A (en) * | 1991-02-20 | 1992-09-18 | Toshiba Corp | Mold assembly |
-
1993
- 1993-05-24 JP JP12134493A patent/JPH06328489A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0234223B2 (en) * | 1985-07-25 | 1990-08-02 | Pfu Ltd | |
| JPH02293335A (en) * | 1989-05-02 | 1990-12-04 | Asahi Optical Co Ltd | Formation of optical element and forming apparatus therefor |
| JPH03161317A (en) * | 1989-11-21 | 1991-07-11 | Toshiba Corp | Injection compression mold |
| JPH04176623A (en) * | 1990-11-12 | 1992-06-24 | Nachi Fujikoshi Corp | Injection compression molding |
| JPH04263916A (en) * | 1991-02-20 | 1992-09-18 | Toshiba Corp | Mold assembly |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1021421C2 (en) * | 2002-09-10 | 2004-03-11 | Fountain Patents B V | Device and method for manufacturing products from a warm plastic mass. |
| WO2004024416A1 (en) * | 2002-09-10 | 2004-03-25 | Fountain Patents B.V. | Apparatus and method for manufacturing products from a thermoplastic mass |
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