JPS63188033A - Molding method for synthetic resin product - Google Patents
Molding method for synthetic resin productInfo
- Publication number
- JPS63188033A JPS63188033A JP2068787A JP2068787A JPS63188033A JP S63188033 A JPS63188033 A JP S63188033A JP 2068787 A JP2068787 A JP 2068787A JP 2068787 A JP2068787 A JP 2068787A JP S63188033 A JPS63188033 A JP S63188033A
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- mold
- die plate
- molding material
- resin 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.)
- Granted
Links
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 59
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 59
- 238000000465 moulding Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000012778 molding material Substances 0.000 claims abstract description 46
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 230000013011 mating Effects 0.000 claims description 15
- 230000002441 reversible effect Effects 0.000 claims description 5
- 238000000748 compression moulding Methods 0.000 abstract description 7
- 238000003780 insertion Methods 0.000 abstract description 5
- 230000037431 insertion Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 230000006835 compression Effects 0.000 description 12
- 238000007906 compression Methods 0.000 description 12
- 238000001746 injection moulding Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000000926 separation method Methods 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
- B29C45/1628—The materials being injected at different moulding stations using a mould carrier rotatable about an axis perpendicular to the opening and closing axis of the moulding stations
-
- 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
- B29C45/03—Injection moulding apparatus
- B29C45/12—Injection moulding apparatus using two or more fixed moulds, e.g. in tandem
-
- 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
【発明の詳細な説明】
（産業上の利用分野）
本発明は色彩或いは性質を異にする異種の合成樹脂成形
材料により成形する合成樹脂製品の成形法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for molding synthetic resin products using different synthetic resin molding materials having different colors or properties.
（従来の技術）
反転自在な中央のダイプレートと該ダイプレートに対し
て進退動自在な両側の可動ダイプレートとよりなる成形
機を用い、型締め時に一側の可動ダイプレートと中央の
ダイプレート間にある一方の合せ型に第１の合成樹脂成
形材料を射出するとともに他側の可動ダイプレートと中
央のダイプレート間にあって前記した第１の合成樹脂成
形材料による一次成形品が内蔵された。他方の合せ型内
に第２の合成樹脂成形材料を射出して異種の合成樹脂よ
りなる成形品を成形するようにした合成樹脂製品の成形
法は、本発明者等によって開発されて特開昭５０−１４
７５８号公報等によって開示されている。(Prior art) A molding machine consisting of a center die plate that is freely reversible and movable die plates on both sides that can move forward and backward with respect to the die plate is used, and when the mold is clamped, the movable die plate on one side and the die plate in the center are The first synthetic resin molding material was injected into one mating mold located between them, and the primary molded product made of the first synthetic resin molding material described above was housed between the movable die plate on the other side and the central die plate. A method for molding synthetic resin products, in which a second synthetic resin molding material is injected into the other mating mold to mold a molded product made of a different type of synthetic resin, was developed by the present inventors and published in Japanese Patent Application Laid-Open No. 50-14
This is disclosed in Publication No. 758 and the like.
（発明が解決しようとする問題点）
ところが、前記したような方法はいずれも第１の合成樹
脂成形材料によって射出成形された一次成形品に対し第
２の合成樹脂成形材料を射出成形して二次層を形成する
ものであるから、あくまでも−次成形品は射出成形法で
成形容品な比較的粘性の低い合成樹脂成形材料によって
成形できるものに限定され、また、−次成形品のうち二
次層を形成する部位を特に肉薄にしておくと歪が生じ易
いので合成樹脂成形材料は成形収縮率の小さいものに限
定される等の問題があった。(Problems to be Solved by the Invention) However, in all of the above methods, a second synthetic resin molding material is injection molded onto a primary molded product injection molded with a first synthetic resin molding material. Since it forms the next layer, the next molded product is limited to those that can be molded by injection molding using a synthetic resin molding material with relatively low viscosity. If the area where the next layer is to be formed is particularly thin, distortion is likely to occur, so there have been problems such as the synthetic resin molding material being limited to those with a small molding shrinkage rate.
（問題点を解決するための手段）
本発明は前記のような問題点を解決し、粘性の高い合成
樹脂成形材料や成形収縮率の大きな合成樹脂成形材料に
よる成形成いは一次成形品のうち二次層を形成したい部
位を肉薄化しておくこともできる異種の合成樹脂成形材
料を用いた合成樹脂製品の成形法に関するもので、反転
自在な中央のダイプレートと該ダイプレートに対して進
退動自在な両側の可動ダイプレートとよりなる成形機を
用い、型締め時に一側の可動ダイプレートと中央のダイ
プレート間にある一方の合せ型に第１の合成樹脂成形材
料を射出するとともに他側の可動ダイプレートと中央の
ダイプレート間にあって前記した第１の合成樹脂成形材
料による一次成形品が内蔵された他方の合せ型内に第２
の合成樹脂成形材料を射出して異種の合成樹脂よりなる
成形品を成形するようにした合成樹脂製品の成形法にお
いて、少なくとも第１の合成樹脂成形材料は一方の合せ
型が完全に型締めされることのない半型締状態でそのキ
ャビティ部に余裕が残されるよう射出後完全型締めして
キャビティ部内の前記第１の合成樹脂成形材料をキャビ
ティ部一杯に圧縮成形するようにしたことを特徴とする
ものである。(Means for Solving the Problems) The present invention solves the above-mentioned problems. This relates to a molding method for synthetic resin products using different types of synthetic resin molding materials, which allows the area where the secondary layer is to be formed to be thinner, and includes a reversible central die plate and movement that moves forward and backward relative to the die plate. Using a molding machine consisting of movable die plates on both sides, when the mold is clamped, the first synthetic resin molding material is injected into one mating mold between the movable die plate on one side and the center die plate, and the molding material is injected into the mold on the other side. A second mold is located between the movable die plate and the center die plate and contains a primary molded product made of the first synthetic resin molding material.
In a method of molding a synthetic resin product, in which a molded product made of different types of synthetic resin is molded by injecting synthetic resin molding materials, one mating mold of at least the first synthetic resin molding material is completely clamped. The first synthetic resin molding material in the cavity is compression-molded to the full extent of the cavity by completely closing the mold after injection so that there is some room left in the cavity in a half-clamped state to prevent the mold from being partially closed. That is.
本発明において用いられる成形機としては、反転自在な
中央のダイプレートと該ダイプレートに対して進退動自
在な両側の可動ダイプレートとよりなる基本構造が公知
の成形機を用いる。そして、その両可動ダイプレートを
中央のダイプレートに向は前進させて一側の可動ダイプ
レートと中央のダイプレートにそれぞれ取付けられた金
型により形成されている一方の合せ型を半型締め状態と
してそのキャビティ部内に余裕を残して第１の合成樹脂
成形材料を供給後完全型締めして前記第１の合成樹脂成
形材料をキャビティ部一杯に圧縮成形する。次に、この
圧縮成形品を前記一方の合せ型のうち中央のダイプレー
ト側の金型に残して型開きしたうえ中央のダイプレート
を反転し、再び両可動ダイプレートを中央のダイプレー
トに向は前進させて前記した一側の可動ダイプレートと
中央のダイプレート間にある一方の合せ型で前記した第
１の合成樹脂成形材料の供給および圧縮成形を行う間に
他側の可動ダイプレートと中央のダイプレートにより型
締めされて前記工程で成形された圧縮成形品を内蔵して
いる他方の合せ型のキャビティ部に第２の合成樹脂成形
材料を射出成形することにより圧縮成形されて末だ冷却
されることのない一次成形品に射出成形による二次層を
成形一体化するのである。このようにして圧縮成形によ
り一次成形品を成形した直後に射出成形法により異種の
合成樹脂成形材料よりなる二次層を形成すれば、第１の
合成樹脂成形材料が粘性の高くて射出成形では良質のも
のが成形され難い性質のものであっても簡単に成形でき
、また、成形収縮率が大きい材料を用いたり二次成形層
を形成する部位を予め肉薄化した一次成形品であっても
殆んど収縮歪は生ずることがなくなる。なお、二次層の
成形に際しても一次成形品を成形する場合と同様筒２の
合成樹脂成形材料を半型締め状態で射出後完全型締めし
てキャビティ部一杯に圧縮成形するようにしてもよい。The molding machine used in the present invention is a molding machine with a known basic structure consisting of a center die plate that is freely reversible and movable die plates on both sides that can move forward and backward with respect to the die plate. Then, both movable die plates are moved forward toward the center die plate, and one of the mating molds formed by the molds attached to the one side movable die plate and the center die plate is in a half-clamped state. After supplying the first synthetic resin molding material with a margin left in the cavity, the mold is completely clamped and the first synthetic resin molding material is compression molded to fill the cavity. Next, the compression molded product is left in the mold on the center die plate side of the one mating mold, the mold is opened, the center die plate is turned over, and both movable die plates are directed toward the center die plate again. is moved forward to supply and compression mold the first synthetic resin molding material between the movable die plate on one side and the center die plate with the movable die plate on the other side. The mold is clamped by a central die plate and compression molded by injecting a second synthetic resin molding material into the cavity of the other mating mold which houses the compression molded product molded in the above process. The secondary layer is integrally molded by injection molding into the primary molded product, which is not cooled. If a secondary layer made of a different type of synthetic resin molding material is formed by injection molding immediately after the primary molded product is formed by compression molding in this way, the first synthetic resin molding material is too viscous to be injection molded. It can be easily molded even if it is of high quality and has properties that are difficult to mold, and even if it is a primary molded product that uses a material with a high molding shrinkage rate or has thinned the area where the secondary molding layer will be formed in advance. Almost no shrinkage strain occurs. In addition, when molding the secondary layer, the synthetic resin molding material of the tube 2 may be injected in a semi-clamped state, and then fully clamped to compression mold to fill the cavity. .
（実施例）
次に、本発明方法の実施例を図示の装置を実施例として
詳細に説明すれば、（１１は合成樹脂成形機のベースで
、該ベース（１１上に所要間隔をおいて植設した一方の
固定盤（２ａ）と他方の固定盤（２ｂ）の四隅間には複
数本のタイバー（３）が張架されている。(Example) Next, an example of the method of the present invention will be described in detail using the illustrated apparatus as an example. (11 is a base of a synthetic resin molding machine, A plurality of tie bars (3) are stretched between the four corners of one fixed platen (2a) and the other fixed platen (2b) provided.
（４ａ）は一方の固定盤（２ａ）に面して前記タイバー
（３）に誘導される第１の可動ダイプレートであり、（
４ｂ）は他方の固定盤（２ｂ）に面して同様タイバー（
３）に誘導される第２の可動ダイプレートであって、該
第１の可動ダイプレート（４ａ）と第２の可動ダイプレ
ート（４ｂ）には前記各固定盤（２ａ）、（２ｂ）の両
側面に設置される金型の開閉を行う小型のシリンダ（５
ａ）、（５ｂ）の各ピストンロッドの先端部が固着され
ている。また、各可動ダイプレート（４ａ）、（４ｂ）
の間には中央のダイプレート（７）がその四隅をタイバ
ー（３）の２個所の止めカラー間に遊嵌されて前記止め
カラー間を左右に若干移動できるように保持されている
。さらに、前記各固定盤（２ａ）、（２ｂ）の夫々の外
側位置のベース（１）上にはレール等の案内部材が夫々
設置され、これに沿って各射出装置（９ａ）、（９ｂ）
が夫々移動可能に係合されており、該射出装置（９ａ）
、（９ｂ）の夫々のノズル部は固定盤（２ａ）、（２ｂ
）及び可動ダイプレート（４ａ）、（４ｂ）に夫々設け
られた各種連部を通って後記する各金型に臨ませてあり
、そして、射出装置（９ａ）、（９ｂ）の底部には図示
されないシリンダが夫々設置されていてその各ピストン
ロッドの先端は前記可動ダイプレート（４ａ）、（４ｂ
）に夫々固着され射出装置（９ａ）、（９ｂ）と可動ダ
イプレート（４ａ）、（４ｂ）とは夫々連動される構成
となっている。また、前記固定盤（２ｂ）には第８図及
び第９図に示すように、第２の可動ダイプレート（４ｂ
）に面する一端面に他方のロック板（１１ｂ）が摺動自
在に保持され、その−側端部は他方の固定盤（２ｂ）の
側面部に取付けたシリンダ（１２ｂ）のピストンロッド
に連結されている。また、前記他方のロック板（ｌｌｂ
）には中央部に射出装置（９ｂ）のノズル部の挿通され
る挿通部（１３ｂ）が形成されてその外側に２個所の孔
（１４ｂ）が透設してあり、鎖孔（１４ｂ）はロック板
（ｌｌｂ）が後退端に達したとき固定盤（２ｂ）の摺動
面における挿通部（６ｂ）の外側に同様に透設された３
個所の孔（１５ｂ）のうち２個に連通ずるように配設さ
せである。従って、ロック板（ｌｌｂ）をシリンダ（１
２ｂ）の作動により第９図の実線に示すように後退端に
位置させた場合は各孔（１４ｂ） １、（１５ｂ） は
すべて開放状態となり、逆にロック板（Ｉｌｂ）をシリ
ンダ（１２ｂ）により第９図の一点ｔＪｉ線に示すよう
に前進端に位置させた場合は連通状態にあった孔（１４
ｂ） 、（１５ｂ） は互にずれて封鎖され且つ開放状
態にあった１個の孔（ｔ５ｂ） もロック板（ｌｌｂ
）の先端側により封鎖されてすべて閉塞状態となる。そ
して、一方の固定盤（２ａ）にも前記と同様の一方のロ
ック板（ｌｌａ） 、シリンダ（１２ａ）、孔（１４ｂ
） 、（１５ｂ）が設けられて同様な作動が行われるよ
うに構成されている。さらに、前記第２の可動ダイプレ
ート（４ｂ）には他方の固定盤（２ｂ）の３個の孔（１
５ｂ）の孔位置と一致する位置に３本の脚（１９ｂ）が
前記固定盤（２ｂ）に向けて突設され、また、前記第１
の可動ダイプレート（４ａ）には第１０図に示すように
一方の固定盤（２ａ）に面する側に開口して挿通部（８
ａ）の外側に環状＃（１７ａ）が形成され、該環状溝（
１７ａ）には３本の脚（１９ａ）を第３図に示すように
一方の固定盤（２ａ）に向けて突設する筒状体（１８ａ
）が摺動自在に嵌入され、そして、前記脚（１９ａ）の
配設位置は固定盤（２ａ）の３個の孔（１５ａ）の孔位
置に一致させている。なお、前記環状溝（１７ａ）内に
ある筒状体（１８ａ）の端部と中間には夫々油導入切口
と油導出溝を設けてこれらには一方の可動ダイプレート
（４ａ）に設けた第１油給排孔と第２油給排孔を夫々開
口させ、該第１油給排孔と第２油給徘孔への油の給排に
より筒状体（１８ａ）は前進、後退を行う。なお、（２
２ａ） 、（２２ｂ）はそれぞれ可動ダイプレート（４
ａ）、（４ｂ）に取付けられる金、型、（２３ａ） 、
（２３ｂ） は中央のグイプレー ） （７＋に取付
けられて前記金型（２２ａ） 、（２２ｂ） とそれ
ぞれ対となる金型である。(4a) is a first movable die plate facing one fixed platen (2a) and guided by the tie bar (3);
4b) faces the other fixed plate (2b) and has a tie bar (
3), the first movable die plate (4a) and the second movable die plate (4b) are provided with the respective fixed plates (2a) and (2b). Small cylinders (5 cylinders) are installed on both sides to open and close the mold.
The tip of each piston rod in a) and (5b) is fixed. In addition, each movable die plate (4a), (4b)
Between them, a central die plate (7) is held with its four corners loosely fitted between two stop collars of the tie bar (3) so that it can move slightly from side to side between the stop collars. Further, guide members such as rails are respectively installed on the base (1) at the outer position of each of the fixed plates (2a) and (2b), and each injection device (9a) and (9b) is installed along this guide member.
are movably engaged with each other, and the injection device (9a)
, (9b) are fixed plates (2a), (2b).
) and movable die plates (4a), (4b), respectively, to face the molds described later, and the bottoms of the injection devices (9a), (9b) are cylinders are installed, and the tips of their respective piston rods are connected to the movable die plates (4a) and (4b).
), and the injection devices (9a) and (9b) are respectively linked to the movable die plates (4a) and (4b). Further, as shown in FIGS. 8 and 9, the fixed plate (2b) has a second movable die plate (4b).
) The other lock plate (11b) is slidably held on one end surface facing the other fixed plate (2b), and its negative end is connected to the piston rod of a cylinder (12b) attached to the side surface of the other stationary plate (2b). has been done. In addition, the other lock plate (llb
) has an insertion part (13b) in the center through which the nozzle part of the injection device (9b) is inserted, and two holes (14b) are transparent on the outside of the insertion part (13b), and the chain hole (14b) is When the lock plate (llb) reaches the retracted end, a 3
Two of the holes (15b) are arranged so as to communicate with each other. Therefore, the lock plate (llb) is attached to the cylinder (1
2b), the holes (14b) 1 and (15b) are all open, and the locking plate (Ilb) is moved to the cylinder (12b). Therefore, when the position is at the forward end as shown by the line tJi in FIG. 9, the hole (14
b), (15b) are shifted from each other, and the one hole (t5b) that was closed and open is also closed to the lock plate (llb).
) is blocked by the distal side of the tube, resulting in a completely occluded state. One fixed plate (2a) also has one lock plate (lla), cylinder (12a), and hole (14b) similar to the above.
) and (15b) are provided to perform similar operations. Furthermore, the second movable die plate (4b) has three holes (1) of the other stationary platen (2b).
Three legs (19b) are provided to protrude toward the fixed plate (2b) at positions corresponding to the hole positions of the first
As shown in Fig. 10, the movable die plate (4a) has an insertion portion (8) that is open on the side facing one fixed plate (2a).
An annular # (17a) is formed on the outside of a), and the annular groove (
17a) has a cylindrical body (18a) with three legs (19a) protruding toward one fixed platen (2a) as shown in FIG.
) is slidably fitted in, and the arrangement position of the leg (19a) is made to match the position of the three holes (15a) of the stationary platen (2a). Note that an oil introduction cut and an oil outlet groove are provided at the end and the middle of the cylindrical body (18a) in the annular groove (17a), respectively, and these are connected to the grooves provided on one movable die plate (4a). The first oil supply and discharge hole and the second oil supply and discharge hole are respectively opened, and the cylindrical body (18a) moves forward and backward by supplying and discharging oil to the first oil supply and discharge hole and the second oil supply and discharge hole. . In addition, (2
2a) and (22b) are respectively movable die plates (4
a), the metal mold attached to (4b), (23a),
(23b) is a mold that is attached to the central guipure (7+) and pairs with the molds (22a) and (22b), respectively.
このように構成されたものにおいて、各シリンダ（５ａ
）、（５ｂ）を作動させて第１の可動ダイプレート（４
ａ）と第２の可動ダイプレート（４ｂ）を夫々の脚（１
９ａ） 、（１９ｂ）が各固定！（２ａ）、（２ｂ）の
夫々の３個の孔（１５ａ） 、（１５ｂ）に挿通された
第３図に示した型開き状態から第４図に示すように中央
のダイプレート（７）側へ移動させて他方の金型（２２
ｂ） ヲ金型（２３ｂ）へ密着させるとともに、一方の
金型（２２ａ）を金型（２３ａ）に近接させて相互間に
僅がな余裕（Ｃ）が形成された状態とする。そして、シ
リンダ（１２ｂ）の作動によりロック板（ｌｌｂ）を前
進させ、他方の可動ダイプレート（４ｂ）が後退される
ことのないように型締めする。次に、第５図に示すよう
にシリンダ（５ａ）の作動により一方の可動グイブレ−
ト（４ａ）を僅かに前進させたうえシリンダ（１２ａ）
の作動によりロック板（Ｉｌａ） も前進させ、続い
てシリンダ（５ａ）の逆作動により一方の可動ダイプレ
ート（４ａ）を余裕（Ｃ）が形成される旧位置まで後退
させた半型締状態とする。この状態が得られたならば一
方の射出装置（９ａ）に設けられる図示されないシリン
ダの作動により可動ダイプレート（４ａ）の挿通部（８
ａ）に位置されたノズルを前進させ、このノズルから粘
性の高い第１の合成樹脂成形材料（Ｐ）を一方の合せ型
のキャビティ部内に余裕を残して供給し、続いて前記ノ
ズルを後退させたうえ筒状体（１８ａ）を後退させると
、第１の可動ダイプレート（４ａ）は金型（２２ａ）
、（２３ａ）間の余裕（Ｃ）がなくなるまで前進して完
全に型締め状態となり、この際、第１の合成樹脂成形材
料（Ｐ） は圧縮成形されることとなる。このようにし
て第１の合成樹脂成形材料の圧縮成形が終了したら、型
締め時とは逆の作動を行わせて金型（２２ａ） 、（２
−３ａ） と金型（２２ｂ） 、（２３ｂ） の型開
きを行う。この際第１の合せ型において成形された圧縮
成形品が中央のダイプレート（７）に取付けられた一方
の金型に残されるよう金型設計しておくものとする。そ
して、型開き後は中央のダイプレート（７）を反転させ
たうえ前記した型締め操作を再度行い、一方の合せ型に
おいて前記した第１の合成樹脂成形材料（Ｐ）の供給と
これに続く圧縮成形を行うとともに、前記工程で圧縮成
形品が内蔵されている他方の合せ型のキャビティ部に第
２の合成樹脂成形材料（Ｑ）を射出成形すれば、他方の
合せ型内には異種の合成樹脂成形材料よりなる製品が成
形されるから、型開き後この製品を取出し、以下、前記
した一連の工程を繰り返して製品の連続成形を行えばよ
い。なお、二次層の成形に際しても一次成形品を成形時
と同様合成樹脂材料を半型締め状態で射出供給後完全型
締めしてキャビティ部一杯に圧縮成形する場合には、両
方の合せ型が前記実施例における場合と同様半型締め状
態と完全型締め状態とを段階的にとるように作動させれ
ばよい。In this structure, each cylinder (5a
), (5b) to move the first movable die plate (4
a) and the second movable die plate (4b) on their respective legs (1
9a) and (19b) are each fixed! From the mold open state shown in Fig. 3 inserted through the three holes (15a) and (15b) of (2a) and (2b), respectively, to the center die plate (7) side as shown in Fig. 4. and move it to the other mold (22
b) Bring it into close contact with the mold (23b), and bring one mold (22a) close to the mold (23a) so that a slight margin (C) is formed between them. Then, the lock plate (llb) is moved forward by the operation of the cylinder (12b), and the mold is clamped so that the other movable die plate (4b) is not moved back. Next, as shown in FIG.
Slightly move the cylinder (4a) forward and then move the cylinder (12a)
The lock plate (Ila) is also moved forward by the operation of the cylinder (5a), and then one of the movable die plates (4a) is moved back to the old position where a margin (C) is formed by the reverse operation of the cylinder (5a). do. Once this state is obtained, the insertion portion (8
The nozzle located in a) is advanced, and the highly viscous first synthetic resin molding material (P) is supplied from this nozzle into the cavity of one of the mating molds, leaving a margin, and then the nozzle is retreated. When the cylindrical body (18a) is retracted, the first movable die plate (4a) moves to the mold (22a).
, (23a) until there is no margin (C) between them, and the mold is completely closed. At this time, the first synthetic resin molding material (P) is compression molded. When the compression molding of the first synthetic resin molding material is completed in this way, the operation opposite to that for mold clamping is performed to close the molds (22a) and (2).
-3a) and the molds (22b) and (23b) are opened. At this time, the molds are designed so that the compression molded product molded in the first mating mold remains in one mold attached to the central die plate (7). After opening the mold, the center die plate (7) is reversed and the mold clamping operation described above is performed again, and the first synthetic resin molding material (P) described above is supplied to one of the mating molds. If compression molding is performed and a second synthetic resin molding material (Q) is injection molded into the cavity of the other mating mold in which the compression molded product is built in in the above step, different types of resin will be contained in the other mating mold. Since a product made of a synthetic resin molding material is molded, the product may be removed after opening the mold, and the series of steps described above may be repeated to continuously mold the product. In addition, when molding the secondary layer, in the same way as when molding the primary molded product, if the synthetic resin material is injected and supplied in a half-closed state, and then the mold is completely closed and compression molded to fill the cavity, both molds should be As in the case of the embodiment described above, the operation may be performed so that the half-mold-clamped state and the fully-clamped state are achieved in stages.
（発明の効果）
本発明は前記説明から明らかなように、異種の合成樹脂
成形材料による二重成形を行うに際し、第１の合成樹脂
成形材料によって成形される一次成形品は圧縮成形品と
し、この圧縮成形品が冷却することのない圧縮成形直後
に行う第２の合成樹脂成形材料による二次層の形成は射
出成形により行うようにしたので、第１の合成樹脂成形
材料が金属粉やガラス繊維を充填材とした粘性の高い場
合でも適確容易な成形が可能なうえ色彩や性質を異にす
る各種の合成樹脂成形材料を用いた場合或いは二次層を
形成する部分を肉薄化した場合でも通常の射出成形によ
る場合に比べ成形収縮率を小さくでき、二次層の形成は
圧縮成形に続き連続的に行われるので二次層が剥離する
ことがないうえに連続作業が容易で安価に量産できる利
点と相俟ち、従来の異種の合成樹脂成形材料を用いた合
成樹脂製品の成形洗上の問題点を解決したものとして産
業の発展に寄与するところ極めて大なものである。(Effects of the Invention) As is clear from the above description, in the present invention, when performing double molding using different types of synthetic resin molding materials, the primary molded product molded using the first synthetic resin molding material is a compression molded product, Since the formation of the secondary layer using the second synthetic resin molding material was carried out by injection molding, which is performed immediately after compression molding in which the compression molded product is not cooled, the first synthetic resin molding material is Even in highly viscous cases using fiber as a filler, accurate and easy molding is possible, and when various synthetic resin molding materials with different colors and properties are used, or when the part that forms the secondary layer is made thinner. However, compared to normal injection molding, the molding shrinkage rate can be reduced, and the formation of the secondary layer is performed continuously following compression molding, so the secondary layer does not peel off, and continuous work is easy and inexpensive. Combined with the advantage of being mass-producible, this method will greatly contribute to the development of industry by solving the problems associated with molding and cleaning conventional synthetic resin products using different types of synthetic resin molding materials.
第１図は本発明方法を実施する合成樹脂成形機の１例を
示す一部切欠正面図、第２図は同しく平面図、第３図、
第４図、第５図、第６図、第７図は本査明方法の工程説
明図、第８図は本発明方法に用いる合成樹脂成形機の固
定盤及び口、り板部分の一部切欠斜視図、第９図は同じ
く正面図、第１０図は同じく一方の可動ダイプレートの
一部切欠斜視図、第１１図は同しく他方の可動ダイプレ
ートの一部切欠斜視図である。
（４ａ）、（４ｂ）： 可動ダイプレート、（９ａ）、
（９ｂ） ：射出装置、（ｌｌａ） 、（ｌｌｂ） ：
Ｄ ｙり仮、（２２ａ） 、（２２ｂ） 、（２３
ａ） 、（２３ｂ）：金型、（Ｃ）：余裕、〈Ｐ）：第
１の合成樹脂成形材料、（Ｑ）：第２の合成樹脂成形材
料。
特許出願人 株式会社高橋精機工業所
代 理 人 名 嶋 明 即問
綿 貫 達 離開
山 本 文 夫第３図
ｓ ５ 図FIG. 1 is a partially cutaway front view showing an example of a synthetic resin molding machine that implements the method of the present invention, FIG. 2 is a plan view, and FIG.
Figures 4, 5, 6, and 7 are process explanatory diagrams of the present inspection method, and Figure 8 is a part of the stationary plate, mouth, and plate portion of the synthetic resin molding machine used in the method of the present invention. 9 is a front view, FIG. 10 is a partially cutaway perspective view of one movable die plate, and FIG. 11 is a partially cutaway perspective view of the other movable die plate. (4a), (4b): Movable die plate, (9a),
(9b): Injection device, (lla), (llb):
Dykari, (22a), (22b), (23
a), (23b): Mold, (C): Allowance, <P): First synthetic resin molding material, (Q): Second synthetic resin molding material. Patent applicant: Takahashi Seiki Kogyo Co., Ltd. Representative: Akira Shima Immediate question
Watanuki Tatsu separation
Fumi Yamamoto Figure 3 s 5 Figure
Claims (1)
て進退動自在な両側の可動ダイプレートとよりなる成形
機を用い、型締め時に一側の可動ダイプレートと中央の
ダイプレート間にある一方の合せ型に第１の合成樹脂成
形材料を射出するとともに他側の可動ダイプレートと中
央のダイプレート間にあって前記した第１の合成樹脂成
形材料による成形品が内蔵された他方の合せ型内に第２
の合成樹脂成形材料を射出して異種の合成樹脂よりなる
成形品を成形するようにした合成樹脂製品の成形法にお
いて、少なくとも第１の合成樹脂成形材料は一方の合せ
型が完全に型締めされることのない半型締状態でそのキ
ャビティ部に余裕が残されるよう射出後完全型締めして
キャビティ部内の前記第１の合成樹脂成形材料をキャビ
ティ部一杯に圧縮成形するようにしたことを特徴とする
合成樹脂製品の成形法。Using a molding machine consisting of a center die plate that is freely reversible and movable die plates on both sides that can move forward and backward with respect to the die plate, when the mold is clamped, one side between the movable die plate on one side and the center die plate is A first synthetic resin molding material is injected into the mating mold, and a first synthetic resin molding material is injected into the other mating mold, which is located between the movable die plate on the other side and the center die plate and contains a molded product made of the first synthetic resin molding material. 2
In a method of molding a synthetic resin product, in which a molded product made of different types of synthetic resin is molded by injecting synthetic resin molding materials, one mating mold of at least the first synthetic resin molding material is completely clamped. The first synthetic resin molding material in the cavity is compression-molded to the full extent of the cavity by completely closing the mold after injection so that there is some room left in the cavity in a half-clamped state to prevent the mold from being partially closed. Molding method for synthetic resin products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62020687A JPH0615186B2 (en) | 1987-01-30 | 1987-01-30 | Molding method for synthetic resin products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62020687A JPH0615186B2 (en) | 1987-01-30 | 1987-01-30 | Molding method for synthetic resin products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63188033A true JPS63188033A (en) | 1988-08-03 |
| JPH0615186B2 JPH0615186B2 (en) | 1994-03-02 |
Family
ID=12034074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62020687A Expired - Lifetime JPH0615186B2 (en) | 1987-01-30 | 1987-01-30 | Molding method for synthetic resin products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0615186B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006110990A (en) * | 2004-10-11 | 2006-04-27 | Incos Spa | Method and apparatus for injection/compression-molding article made of plastic material having two components |
| JP2006110991A (en) * | 2004-10-11 | 2006-04-27 | Incos Spa | Method and apparatus for injection/compression-molding article made of plastic material having two components |
| JP2006110994A (en) * | 2004-10-11 | 2006-04-27 | Incos Spa | Method for production of plate made of plastic material equipped with component overmolded by injecto-compression |
| JP2006142805A (en) * | 2004-11-19 | 2006-06-08 | Incos Spa | Apparatus and method for injecting and compression-molding article made of plastic material and equipped with two constituents |
| AT503682B1 (en) * | 2006-06-03 | 2009-08-15 | Krauss Maffei Kunststofftech | METHOD AND DEVICE FOR PRODUCING COATED PLASTIC MOLDED PARTS |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4602869B2 (en) * | 2005-08-17 | 2010-12-22 | 株式会社名機製作所 | Molding method of composite molded product and mold clamping device used therefor |
| JP4880045B2 (en) * | 2010-01-29 | 2012-02-22 | 株式会社名機製作所 | Clamping device for composite molding and molding method of composite molded product |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5014758A (en) * | 1973-06-08 | 1975-02-17 | ||
| JPS6023421A (en) * | 1983-07-18 | 1985-02-06 | Idemitsu Petrochem Co Ltd | Polycarbonate for injection compression molding |
| JPS60212312A (en) * | 1984-04-06 | 1985-10-24 | Toyota Motor Corp | Manufacture of laminated molding |
| JPS62280016A (en) * | 1986-05-30 | 1987-12-04 | Nissei Plastics Ind Co | Method of composite molding by injection and compresssion |
-
1987
- 1987-01-30 JP JP62020687A patent/JPH0615186B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5014758A (en) * | 1973-06-08 | 1975-02-17 | ||
| JPS6023421A (en) * | 1983-07-18 | 1985-02-06 | Idemitsu Petrochem Co Ltd | Polycarbonate for injection compression molding |
| JPS60212312A (en) * | 1984-04-06 | 1985-10-24 | Toyota Motor Corp | Manufacture of laminated molding |
| JPS62280016A (en) * | 1986-05-30 | 1987-12-04 | Nissei Plastics Ind Co | Method of composite molding by injection and compresssion |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006110990A (en) * | 2004-10-11 | 2006-04-27 | Incos Spa | Method and apparatus for injection/compression-molding article made of plastic material having two components |
| JP2006110991A (en) * | 2004-10-11 | 2006-04-27 | Incos Spa | Method and apparatus for injection/compression-molding article made of plastic material having two components |
| JP2006110994A (en) * | 2004-10-11 | 2006-04-27 | Incos Spa | Method for production of plate made of plastic material equipped with component overmolded by injecto-compression |
| JP4524227B2 (en) * | 2004-10-11 | 2010-08-11 | イングラス ソシエタ ア レスポンサビリタ リミタータ | Method for producing plates made of plastic material with parts overmolded by injection compression |
| JP2006142805A (en) * | 2004-11-19 | 2006-06-08 | Incos Spa | Apparatus and method for injecting and compression-molding article made of plastic material and equipped with two constituents |
| AT503682B1 (en) * | 2006-06-03 | 2009-08-15 | Krauss Maffei Kunststofftech | METHOD AND DEVICE FOR PRODUCING COATED PLASTIC MOLDED PARTS |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0615186B2 (en) | 1994-03-02 |
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