JP2003145593A - Method for molding large-sized light guide plate and mold used therein - Google Patents

Method for molding large-sized light guide plate and mold used therein

Info

Publication number
JP2003145593A
JP2003145593A JP2001348822A JP2001348822A JP2003145593A JP 2003145593 A JP2003145593 A JP 2003145593A JP 2001348822 A JP2001348822 A JP 2001348822A JP 2001348822 A JP2001348822 A JP 2001348822A JP 2003145593 A JP2003145593 A JP 2003145593A
Authority
JP
Japan
Prior art keywords
mold
main body
fixed
wall portion
cavity
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
Application number
JP2001348822A
Other languages
Japanese (ja)
Other versions
JP3878001B2 (en
Inventor
Ikuo Asai
郁夫 浅井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meiki Seisakusho KK
Original Assignee
Meiki Seisakusho KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meiki Seisakusho KK filed Critical Meiki Seisakusho KK
Priority to JP2001348822A priority Critical patent/JP3878001B2/en
Publication of JP2003145593A publication Critical patent/JP2003145593A/en
Application granted granted Critical
Publication of JP3878001B2 publication Critical patent/JP3878001B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a mold for molding a large-sized light guide plate consisting of a movable mold, which comprises a main body part and an outer wall part capable of being controlled in the alternation of its position in the mold on-off direction with respect to a main body part and having the mating surface with a fixed mold on the side of the fixed mold and a cavity forming surface provided in the inside surface thereof, and the fixed mold having the mating surface corresponding to the mating surface of the outer wall part and to make it easy to take out a light guide plate by opening the side surface of the light guide plate when the outer wall part is allowed to retreat after molding to take out the light guide plate to take out the light guide plate without dropping and damaging the same. SOLUTION: The mold for molding the large-sized light guide plate consisting of the movable mold, which comprises the main body part and the outer wall part capable of being controlled in the alternation of its position in the mold on-off direction with respect to the main body part and having the mating surface with the fixed mold on the side of the fixed mold and the cavity forming surface provided to the inside surface thereof, and the fixed mold having the mating surface corresponding to the mating surface of the outer wall part is provided and, after molding, the position of the outer wall part to the main body part of the movable mold is allowed to retreat and the light guide plate is sucked in such a state that the outer wall part and a part of the side surface part of the light guide plate are brought to a contact state to be taken out.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明はキャビティ内に射出
充填した溶融樹脂に対して圧縮力を及ぼして成形するイ
ンジェクションコンプレッションまたはインジェクショ
ンプレス成形による液晶表示装置等に使用される10イ
ンチ以上の大型導光板の成形方法および大型導光板の成
形用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 large-sized light guide plate of 10 inches or more used in a liquid crystal display device or the like by injection compression or injection press molding in which a molten resin injected and filled in a cavity is subjected to a compressive force for molding. And a metal mold for molding a large-sized light guide plate.

【0002】[0002]

【従来の技術】10インチ以上の大型導光板の成形はイ
ンジェクションコンプレッション成形またはインジェク
ションプレス成形により行われている。その際に使用さ
れる金型は一方の金型に凹部が形成され、他方の金型に
凸部が形成され、凸部と凹部との間に形成されたキャビ
ティに射出充填された溶融樹脂に対して圧縮力を及ぼす
ことのできる、所謂インロー金型が用いられている。し
かしながらインロー金型ではキャビティ外周部分のベン
ト(間隙)を広くすると、バリが発生し、また間隔を狭
くしすぎると型開閉時に両金型が摺接して所謂かじりに
よる損傷が発生しやすいという問題があった。またイン
ロー金型ではその構造上導光板にパターン形成面を転写
するためのスタンパを取付けるのが困難であるという問
題があった。
2. Description of the Related Art A large-sized light guide plate of 10 inches or more is formed by injection compression molding or injection press molding. The mold used at that time has a concave part formed in one mold, a convex part formed in the other mold, and the molten resin injected and filled in the cavity formed between the convex part and the concave part. A so-called spigot die, which can exert a compressive force on the contrary, is used. However, in the spigot die, if the vent (gap) at the outer peripheral portion of the cavity is widened, burrs are generated, and if the gap is too narrow, both dies are in sliding contact when the die is opened and closed, so that damage due to so-called galling tends to occur. there were. In addition, the spigot die has a problem that it is difficult to attach a stamper for transferring the pattern formation surface to the light guide plate due to its structure.

【0003】このような問題を解決するものとして特開
平10−180786号に記載されるような金型を導光
板の成形に用いることが検討されている。このタイプの
金型は可動型のキャビティの外側部分にシール構造体が
設けられ、前記シール構造体は油圧ユニットにより可動
型に対する型開閉方向の位置が変更可能に設けられてい
る。そして前記油圧ユニットを制御することにより、キ
ャビティの容積を減少させキャビティ内の溶融樹脂を圧
縮することができるものである。そしてこの金型を用い
た成形方法では成形後にシール構造体を後退させてから
成形品を取出すため、成形品の側面部が開放されてお
り、成形品を取出し易いという利点がある。
In order to solve such a problem, it has been considered to use a mold as described in Japanese Patent Laid-Open No. 10-180786 for molding a light guide plate. In this type of mold, a seal structure is provided on the outer side of the cavity of the movable mold, and the seal structure is provided so that the position in the mold opening / closing direction with respect to the movable mold can be changed by a hydraulic unit. By controlling the hydraulic unit, the volume of the cavity can be reduced and the molten resin in the cavity can be compressed. In the molding method using this mold, the molded product is taken out after the seal structure is retracted after molding, so that the side surface portion of the molded product is open, and it is easy to take out the molded product.

【0004】しかしながら前記特開平10−18078
6号に記載されたものを用いて大型導光板を成形するた
めには次のような問題があった。すなわち、前記従来の
ものは成形品の取出しの際に、可動型を型開きする前に
成形品の側面部のシール構造体を完全に後退させてしま
うため、凸状の可動金型に対して凹状の成形品が残留さ
れているものについては成形品が落下の危険がなく適す
るが、導光板のように可動金型側のキャビティが平面で
あるものでは、可動金型を開いた際に成形品が落下して
しまう場合があるという問題があった。また成形される
製品が導光板であるため、エジェクタピンで成形品のキ
ャビティ部分を突き出すと導光板に傷がついてしまうと
いう問題もあった。
However, the above-mentioned Japanese Patent Laid-Open No. 10-18078.
There are the following problems in molding a large-sized light guide plate using the material described in No. 6. That is, in the case of the conventional one, when the molded product is taken out, the seal structure on the side surface of the molded product is completely retracted before the movable mold is opened. If the concave mold remains, it is suitable without the risk of falling, but if the cavity on the movable mold side is flat like the light guide plate, it will be molded when the movable mold is opened. There was a problem that the product might fall. Further, since the molded product is a light guide plate, there is a problem that the light guide plate is damaged when the cavity portion of the molded product is projected by the ejector pin.

【0005】[0005]

【発明が解決しようとする課題】本発明は上記の問題を
解決しようとするものであって、可動盤に固定されキャ
ビティ形成面を固定金型側に有し外壁部を周囲に有する
本体部と、本体部に対する型開閉方向の位置が変更制御
可能であって固定金型との接合面を固定金型側に有しキ
ャビティ形成面を内側面に有する外壁部とからなる可動
金型と、キャビティ形成面と該キャビティ形成面の外側
に前記外壁部の接合面の対応する接合面とを有する固定
金型とからなる大型導光板の成形用金型を用いてインジ
ェクションコンプレッション成形またはインジェクショ
ンプレス成形を行い、成形後に外壁部を後退させて成形
品を取出しする際に、成形品の側面部を開放して取出し
易くするとともに、成形品を確実に落下させることな
く、かつ傷をつけずに取出すことを目的とする。
SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and includes a main body portion fixed to a movable plate and having a cavity forming surface on the fixed mold side and an outer wall portion on the periphery. A movable mold comprising a mold part whose position in the mold opening and closing direction with respect to the main body part is changeable and controllable, and a joint surface with the fixed mold part on the fixed mold side and an outer wall part having a cavity forming surface on the inner side surface; Injection molding or injection press molding is performed using a molding die for a large-sized light guide plate, which includes a forming die and a fixed die having a joining surface corresponding to the joining surface of the outer wall portion outside the cavity forming surface. When removing the molded product by retracting the outer wall after molding, open the side surface of the molded product to facilitate removal, and do not drop the molded product securely and do not scratch it. Aims to take out.

【0006】[0006]

【課題を解決するための手段】上記課題を解決するため
に、本発明の請求項1に係る大型導光板の成形方法は、
本体部に対する型開閉方向の位置が変更制御可能であっ
て固定金型との接合面を固定金型側に有しキャビティ形
成面を内側面に有する外壁部が設けられた可動金型を用
いて成形を行い、可動金型を型開きし、移載機の吸着手
段により成形品を吸着後に、可動金型の本体部に対する
外壁部の位置を後退させ成形品の側面部の少なくとも一
部を開放させてから成形品を取出すことを特徴とする。
In order to solve the above-mentioned problems, the method for molding a large-sized light guide plate according to claim 1 of the present invention comprises:
By using a movable mold in which the position in the mold opening / closing direction with respect to the main body can be controlled to be changed, and a joint surface with the fixed mold is provided on the fixed mold side and an outer wall having a cavity forming surface on the inner side surface is provided. Molding is performed, the movable mold is opened, and after the molded product is sucked by the suction means of the transfer machine, the position of the outer wall portion with respect to the main body of the movable mold is retreated and at least part of the side surface of the molded product is opened. The feature is that the molded product is taken out after the operation.

【0007】本発明の請求項2に係る大型導光板の成形
方法は、請求項1と同じ金型を用い、可動金型を型開き
後または型開き前に、可動金型の本体部に対する外壁部
の位置を後退させるとともに外壁部のキャビティ形成面
と成形品の側面部の一部が当接している状態で移載機の
吸着手段により成形品を吸着し、その後成形品を取出す
ことを特徴とする。
According to a second aspect of the present invention, there is provided a method for molding a large-sized light guide plate, wherein the same mold as in the first aspect is used, and the outer wall of the movable mold with respect to the main body is formed after or before the mold is opened. The feature is that the molded product is sucked by the suction means of the transfer machine while the cavity forming surface of the outer wall and a part of the side surface of the molded product are in contact with each other, and then the molded product is taken out. And

【0008】本発明の請求項3に係る大型導光板の成形
方法は、可動盤に固定されキャビティ形成面を固定金型
側に有し外壁部を周囲に有する本体部と、本体部に対す
る型開閉方向の位置が変更制御可能かつ本体部との間に
設けられた付勢手段により外側に向けて付勢され型開閉
方向と略直角方向の位置が変更可能であって固定金型と
の接合面を固定金型側に有しキャビティ形成面を内側面
に有する外壁部とからなる可動金型と、キャビティ形成
面と該キャビティ形成面の外側に前記外壁部の接合面の
対応する接合面とを可動金型側に有する固定金型とから
なる大型導光板の成形用金型が設けられ、前記金型の型
閉に伴い、外壁部を本体部に向けて型開閉方向と略直角
方向に移動させキャビティを構成し、溶融樹脂を前記金
型に形成されたキャビティ内に射出充填し、可動金型の
本体部を固定金型に向けて圧締し本体部に対する外壁部
の位置を相対的に後退させ、キャビティ内に射出充填さ
れた溶融樹脂を圧縮して成形品を得、型開きに伴い、外
壁部を本体部から外側に向けて型開閉方向と略直角方向
に移動させ、成形品の側面部の少なくとも一部を開放さ
せ、成形品を取出すことを特徴とする。
According to a third aspect of the present invention, there is provided a method of molding a large-sized light guide plate, comprising: a main body having a cavity forming surface fixed to a movable plate and having an outer wall on the periphery, and a mold opening / closing for the main body. The position of the direction can be changed and controlled, and the position of the direction substantially perpendicular to the mold opening / closing direction can be changed by being urged outward by the urging means provided between the main body and the joint surface with the fixed mold. A movable die having an outer wall portion having a cavity forming surface on the inner side surface and a cavity forming surface and a corresponding joint surface of the joint surface of the outer wall portion outside the cavity forming surface. A mold for forming a large-sized light guide plate, which is composed of a fixed mold on the movable mold side, is provided, and when the mold is closed, the outer wall is moved toward the main body in a direction substantially perpendicular to the mold opening / closing direction. To form a cavity and melt resin into the mold formed in the mold. It is injected and filled in the vity, the main body of the movable mold is pressed toward the fixed mold, the position of the outer wall is relatively retracted with respect to the main body, and the molten resin injected and filled in the cavity is compressed. Obtaining a molded product, and moving the outer wall from the main body to the outside in a direction substantially perpendicular to the mold opening / closing direction when the mold is opened, and at least a part of the side surface of the molded product is opened to take out the molded product. Characterize.

【0009】本発明の請求項4に係る大型導光板の成形
方法は、前記請求項1ないし請求項3において、前記可
動金型にキャビティ面に連通してゲートとランナーとス
プルが設けられ、型開き後、可動金型に設けられたエジ
ェクタピンによりキャビティ面以外の部分を突き出すこ
とにより成形品を取り出すことを特徴とする。
According to a fourth aspect of the present invention, there is provided a method for molding a large-sized light guide plate according to the first to third aspects, wherein the movable die is provided with a gate, a runner and a sprue in communication with a cavity surface. After opening, the molded product is taken out by ejecting a portion other than the cavity surface by an ejector pin provided on the movable mold.

【0010】本発明の請求項5に係る大型導光板の成形
方法は、可動盤に固定されキャビティ形成面を固定金型
側に有し外壁部を周囲に有する本体部と、本体部に対す
る型開閉方向の位置が変更制御可能であって固定金型と
の接合面を固定金型側に有しキャビティ形成面を内側面
に有する外壁部とからなる可動金型と、キャビティ形成
面と該キャビティ形成面の外側に前記外壁部の接合面の
対応する接合面とを可動金型側に有し、キャビティに連
通する溶融樹脂通路にはホットランナ機構とバルブゲー
ト機構を有する固定金型とからなる大型導光板の成形用
金型が設けられ、前記可動金型を型閉後、溶融樹脂を前
記金型に形成されたキャビティ内に射出充填し、可動金
型の本体部を固定金型に向けて圧締し本体部に対する外
壁部の位置を相対的に後退させ、キャビティ内に射出充
填された溶融樹脂を圧縮し、溶融樹脂の一部を固定金型
の溶融樹脂通路に逆流させ、所定のタイミングでバルブ
ゲートを閉鎖することを特徴とする。
According to a fifth aspect of the present invention, there is provided a method for molding a large-sized light guide plate, comprising: a main body portion fixed to a movable plate, having a cavity forming surface on the fixed mold side, and an outer wall portion around the main body portion, and a mold opening / closing for the main body portion A movable mold having a joint surface with a fixed mold on the fixed mold side and an outer wall having a cavity forming surface on the inner side surface, a cavity forming surface and the cavity forming A large mold including a joint surface corresponding to the joint surface of the outer wall on the movable die side outside the surface, and a fixed die having a hot runner mechanism and a valve gate mechanism in a molten resin passage communicating with the cavity. A mold for molding the light guide plate is provided, after closing the movable mold, the molten resin is injected and filled into the cavity formed in the mold, and the main body of the movable mold is directed toward the fixed mold. Position the outer wall relative to the body of the clamp. Is retracted, injection filling molten resin was pressed into the cavity, to flow back part of the molten resin in the molten resin passage of the stationary mold, characterized by closing the valve gate at a predetermined timing.

【0011】本発明の請求項6に係る大型導光板の成形
用金型は、可動盤に固定されキャビティ形成面を固定金
型側に有し外壁部を周囲に有する本体部と、本体部に対
する型開閉方向の位置がシリンダにより変更制御可能で
あって固定金型との接合面を固定金型側に有しキャビテ
ィ形成面を内側面に有する外壁部とからなる可動金型
と、キャビティ形成面と該キャビティ形成面の外側に前
記外壁部の接合面の対応する接合面とを有する固定金型
とからなる大型導光板の成形用金型であって、前記外壁
部の内側面の固定金型側には成形時に一部がキャビティ
形成面を構成するベント面が形成され、前記内側面の可
動盤側には本体部との摺動面が形成されるとともに、前
記外壁部の少なくとも一辺は付勢手段により本体部に向
けて付勢され型開閉方向と略直角方向に位置変更可能に
設けられていることを特徴とする。
According to a sixth aspect of the present invention, there is provided a molding die for a large-sized light guide plate, a main body portion fixed to a movable plate, having a cavity forming surface on the fixed die side, and having an outer wall portion around the main body portion. The position of the mold opening and closing direction can be changed and controlled by the cylinder, and the movable mold is composed of an outer wall portion having a joint surface with the fixed mold on the fixed mold side and a cavity forming surface on the inner side surface, and a cavity forming surface. A mold for molding a large-sized light guide plate, which comprises a fixed mold having a bonding surface corresponding to the bonding surface of the outer wall portion outside the cavity forming surface, and a fixed mold on the inner surface of the outer wall portion. A vent surface that partially forms a cavity forming surface at the time of molding is formed on the side, a sliding surface with the main body is formed on the movable plate side of the inner surface, and at least one side of the outer wall is attached. The mold is opened and closed by being urged toward the main body by the urging means. And it is provided to be repositioned toward the direction substantially perpendicular.

【0012】本発明の請求項7に係る大型導光板の成形
用金型は、可動盤に固定されキャビティ形成面を固定金
型側に有し外壁部を周囲に有する本体部と、本体部に対
する型開閉方向の位置が変更制御可能であって固定金型
との接合面を固定金型側に有しキャビティ形成面を内側
面に有する外壁部とからなる可動金型と、キャビティ形
成面と該キャビティ形成面の外側に前記外壁部の接合面
の対応する接合面とを有する固定金型とからなる大型導
光板の成形用金型であって、前記可動金型の外壁部は少
なくとも一辺が本体部との間に設けられた付勢手段によ
り外側に向けて付勢されるとともに固定金型側には外壁
部側案内面が設けられ、一方固定金型には前記外壁部の
外壁部側案内面に対応した固定金型側案内面が設けら
れ、可動金型を型閉する際に両案内面が摺接されること
により外壁部が内側に向けて移動し、外壁部の内側面に
よってキャビティ形成面が形成され、可動金型が型開き
する際に前記付勢手段による付勢力により外壁部が外側
に向けて移動し、成形品の側面部の少なくとも一部が開
放されることを特徴とする。
According to a seventh aspect of the present invention, there is provided a molding die for a large-sized light guide plate, which includes a main body portion fixed to a movable plate and having a cavity forming surface on the fixed die side and an outer wall portion around the main body portion. A movable mold having a position in the mold opening / closing direction that can be changed and controlled, an outer wall portion having a joint surface with the fixed mold on the fixed mold side and a cavity forming surface on the inner side surface, and a cavity forming surface and A mold for molding a large-sized light guide plate, comprising a fixed mold having a bonding surface corresponding to the bonding surface of the outer wall portion outside the cavity forming surface, wherein at least one side of the outer wall portion of the movable mold is a main body. And an outer wall side guide surface is provided on the fixed mold side, while the fixed mold is guided to the outer wall side of the outer wall part. The fixed mold side guide surface corresponding to the surface is provided, and the movable mold is closed. When the two guide surfaces are slidably contacted with each other during movement, the outer wall portion moves inward, the cavity forming surface is formed by the inner side surface of the outer wall portion, and when the movable mold is opened by the biasing means. The outer wall portion is moved outward by the urging force, and at least a part of the side surface portion of the molded product is opened.

【0013】[0013]

【発明の実施の形態】図1に示すものは、本発明の大型
導光板の成形方法における導光板の成形中の断面図であ
る。図2に示すものは、本発明の大型導光板の成形方法
における導光板の取出し時の状態を示す断面図である。
図3に示すものは、本発明の大型導光板の成形方法に用
いる成形用金型の要部の断面図である。図4に示すもの
は、本発明の大型導光板の成形方法における導光板の取
出し手順を示す説明図である。図5に示すものは、本発
明の大型導光板の成形方法における導光板の別の取出し
手順を示す説明図である。図6に示すものは、本発明の
別の大型導光板の成形用金型の要部の断面図である。図
7に示すものは、本発明の更に別の大型導光板の成形用
金型の要部の断面図である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of a large-sized light guide plate of the present invention during molding of the light guide plate. FIG. 2 is a cross-sectional view showing a state when the light guide plate is taken out in the method for molding a large-sized light guide plate of the present invention.
FIG. 3 is a sectional view of a main part of a molding die used in the method for molding a large-sized light guide plate of the present invention. FIG. 4 is an explanatory view showing a procedure for taking out the light guide plate in the method for molding a large light guide plate of the present invention. FIG. 5 is an explanatory view showing another procedure for taking out the light guide plate in the method for molding a large light guide plate of the present invention. FIG. 6 is a sectional view of an essential part of another molding die for a large-sized light guide plate of the present invention. FIG. 7 is a cross-sectional view of a main part of a mold for molding another large-sized light guide plate of the present invention.

【0014】図1に示されるように10インチ以上の大
型導光板(以下導光板と略す)の成形装置1は、固定盤
2に固定金型3が取付けられ、固定盤2と図示しない支
持盤の間に取付けられたタイバー4に対し摺動可能に設
けられた可動盤5に可動金型6が取付けられている。可
動盤5は図示しない型開閉手段により固定盤2に対し型
開閉方向に移動可能に設けられている。また可動盤5の
固定盤2と反対側の中央には、成形時にキャビティ7内
の溶融樹脂の圧縮を行う圧締手段のラム8が固定され、
図示しない圧締手段のシリンダ内に油を導入することに
より、キャビティ7内の溶融樹脂の圧縮を行う。
As shown in FIG. 1, a molding apparatus 1 for a large-sized light guide plate of 10 inches or more (hereinafter abbreviated as a light guide plate) has a fixed platen 2 to which a fixed mold 3 is attached, and a fixed platen 2 and a support plate (not shown). A movable die 6 is attached to a movable plate 5 slidably provided with respect to a tie bar 4 attached between. The movable platen 5 is provided so as to be movable in the mold opening / closing direction with respect to the fixed platen 2 by a mold opening / closing means (not shown). Further, a ram 8 of a clamping means for compressing the molten resin in the cavity 7 at the time of molding is fixed to the center of the movable plate 5 on the side opposite to the fixed plate 2,
The molten resin in the cavity 7 is compressed by introducing oil into the cylinder of the compression means (not shown).

【0015】なお圧締手段としては、この例以外に固定
盤または可動盤にタイバーをロッドとしてそれぞれ設け
られた四つのシリンダにより可動盤を移動させるもので
もよく、型開閉手段または圧締手段はサーボモータとボ
ールネジの組合せを使用するものであってもよい。
As the pressing means, other than this example, the movable board may be moved by four cylinders each provided with a tie bar as a rod on a fixed board or a movable board, and the mold opening / closing means or the pressing means may be a servo. A combination of a motor and a ball screw may be used.

【0016】固定金型3は固定盤2に固定され、その射
出装置9側の中央部には射出装置9のノズル10が当接
するブッシュ11が設けられ、ブッシュ11に接続して
溶融樹脂通路12が形成されている。固定金型3のキャ
ビティ7に連通する溶融樹脂通路12はマニホールド1
3等のホットランナ機構によるもので、溶融樹脂通路1
2の開閉手段であるバルブゲート機構14が設けられて
いる。
The fixed mold 3 is fixed to the fixed platen 2, and a bush 11 against which the nozzle 10 of the injection device 9 abuts is provided in the center of the injection device 9 side, and the molten resin passage 12 is connected to the bush 11. Are formed. The molten resin passage 12 communicating with the cavity 7 of the fixed mold 3 is the manifold 1
With a hot runner mechanism such as 3, the molten resin passage 1
A valve gate mechanism 14 which is a second opening / closing means is provided.

【0017】図3に示すようにバルブゲート機構14に
続いてはスプル15が設けられている。スプル15は、
固定金型3の可動金型側に向かって開口されており、ス
プル15から直角方向にランナー16、ゲート17が設
けられている。また固定金型3の可動金型側には鏡面板
19が設けられ、鏡面板19にはキャビティ面18が設
けられている。この実施の形態ではキャビティ面18に
は成形品Pにパターン形成面P2を転写するスタンパ2
0が図示しない爪により取付けられている。
As shown in FIG. 3, a sprue 15 is provided following the valve gate mechanism 14. Sprue 15
The fixed mold 3 is opened toward the movable mold side, and a runner 16 and a gate 17 are provided in a direction perpendicular to the sprue 15. A mirror surface plate 19 is provided on the movable mold side of the fixed mold 3, and a cavity surface 18 is provided on the mirror surface plate 19. In this embodiment, the cavity surface 18 has a stamper 2 for transferring the pattern forming surface P2 to the molded product P.
0 is attached by a claw (not shown).

【0018】そして前記したスプル15,ランナー1
6,ゲート17,キャビティ面18からキャビティ形成
面が構成されている。キャビティ形成面の外側には、後
述する可動金型6の外壁部21と対応した型開き方向に
略直角方向の平面からなる接合面22が設けられてい
る。
The sprue 15 and the runner 1 described above
6, the gate 17 and the cavity surface 18 constitute a cavity forming surface. On the outside of the cavity forming surface, a joint surface 22 is provided which is a plane substantially perpendicular to the mold opening direction corresponding to the outer wall portion 21 of the movable mold 6 described later.

【0019】一方可動金型6は、本体部24と外壁部2
1とから構成されている。本体部24は可動盤5に固定
され、固定金型側には鏡面板25が固定され、鏡面板2
5にはキャビティ面18が設けられている。そして可動
金型6の固定金型側にも固定金型3側と対応してキャビ
ティ面18に連通してゲート17,ランナー16,スプ
ル15が形成されており、これらから本体部24のキャ
ビティ形成面が構成される。なお、可動金型6側にスプ
ル15,ランナー16,ゲート17を設けずに、それら
を固定金型3側に設け、可動金型6にはキャビティ面1
8のみを設けるようにしてもよい。
On the other hand, the movable mold 6 comprises a main body portion 24 and an outer wall portion 2.
1 and 1. The main body 24 is fixed to the movable plate 5, and the mirror surface plate 25 is fixed to the fixed mold side.
5 is provided with a cavity surface 18. Further, a gate 17, a runner 16, and a sprue 15 are formed on the fixed mold side of the movable mold 6 so as to communicate with the fixed mold 3 side and communicate with the cavity surface 18, from which the cavity of the main body 24 is formed. The faces are constructed. It should be noted that the sprue 15, the runner 16, and the gate 17 are not provided on the movable mold 6 side, but they are provided on the fixed mold 3 side.
Only 8 may be provided.

【0020】本体部24のキャビティ形成面の周囲の面
27には外壁部21が本体部24に対する型開閉方向の
位置が変更制御可能に設けられている。この実施の形態
では外壁部21は枠体のように一体に設けられ本体部2
4に外挿されている。外壁部21の本体部24に対する
移動機構について説明すると、本体部24のの外側四隅
には外壁部21の本体部に対する移動手段である油圧シ
リンダ29が固定されている。
An outer wall portion 21 is provided on a surface 27 around the cavity forming surface of the main body portion 24 so that the position of the outer wall portion 21 in the mold opening / closing direction with respect to the main body portion 24 can be controlled. In this embodiment, the outer wall portion 21 is integrally provided like a frame body and
4 is extrapolated. The moving mechanism of the outer wall portion 21 with respect to the body portion 24 will be described. Hydraulic cylinders 29, which are moving means for the body portion of the outer wall portion 21, are fixed to the four outer corners of the body portion 24.

【0021】図3に示されるように油圧シリンダ29の
ロッド30は前記外壁部21の後面側31に固定されて
いる。油圧シリンダ29のシリンダ側油室32とロッド
側油室33には図示しない油圧回路が接続されており、
油圧回路のサーボバルブ等により油圧が制御されること
により外壁部21を本体部24に対して型開閉方向に位
置制御および圧力制御可能に設けられている。また移動
手段は、油圧シリンダ29に限定されず、空気圧シリン
ダやモータ等を移動手段に用いてもよく、本体部24側
でなく外壁部21側に設けられたものでもよい。
As shown in FIG. 3, the rod 30 of the hydraulic cylinder 29 is fixed to the rear surface side 31 of the outer wall portion 21. A hydraulic circuit (not shown) is connected to the cylinder side oil chamber 32 and the rod side oil chamber 33 of the hydraulic cylinder 29.
The outer wall portion 21 is provided so that the position and pressure of the outer wall portion 21 can be controlled with respect to the main body portion 24 in the mold opening and closing direction by controlling the hydraulic pressure by a servo valve or the like of a hydraulic circuit. The moving means is not limited to the hydraulic cylinder 29, and a pneumatic cylinder, a motor, or the like may be used as the moving means, and may be provided on the outer wall portion 21 side instead of the main body portion 24 side.

【0022】また図1に示されるように本体部24の油
圧シリンダ29の側方には外壁部21の本体部24に対
する位置を検出する位置検出センサ34が設けられてい
る。この実施の形態では位置検出センサ34はダイヤル
ゲージを使用したものを記載したが、リニアスケールや
ロータリエンコーダを用いたものでもよい。
As shown in FIG. 1, a position detecting sensor 34 for detecting the position of the outer wall portion 21 with respect to the main body portion 24 is provided on the side of the hydraulic cylinder 29 of the main body portion 24. In this embodiment, the position detection sensor 34 is described as using a dial gauge, but it may be one using a linear scale or a rotary encoder.

【0023】図3に示されるように、外壁部21の固定
金型側は接合面35となっており、固定金型3の接合面
22と当接されることにより接合面35と接合面22の
内側に前記したキャビティ形成面が構成される。
As shown in FIG. 3, the fixed mold side of the outer wall portion 21 is a joining surface 35, and the joining surface 35 and the joining surface 22 are brought into contact with the joining surface 22 of the fixed die 3. The cavity forming surface described above is formed inside the.

【0024】また外壁部21の内側面37の固定金型側
はベント面38aとなっており、成形時にはベント面3
8aの可動盤側が本体部24の周囲の面27の固定金型
側のベント面38bと向かい合っている。そして前記ベ
ント面38aと38bとは空気は通すが溶融樹脂は通さ
ないベント(間隙)を形成している。また前記ベントは
成形品の離型のためのエア通路を兼ねており、エア通路
26を経て図示しないエア供給手段に接続されている。
また前記ベント面38aのうちの固定金型側は、成形時
にはキャビティ形成面を構成する。外壁部21の内側面
37の可動盤側は摺動面39aとなっており、本体部2
4の周囲の面27の可動盤側の摺動面39bと摺動自在
に設けられている。
The inner wall surface 37 of the outer wall portion 21 has a vent surface 38a on the side of the fixed mold.
The movable plate side of 8a faces the vent surface 38b of the peripheral surface 27 of the main body 24 on the fixed mold side. The vent surfaces 38a and 38b form a vent (gap) through which air can pass but molten resin cannot pass. The vent also serves as an air passage for releasing the molded product, and is connected to an air supply means (not shown) through the air passage 26.
The fixed mold side of the vent surface 38a constitutes a cavity forming surface during molding. The movable plate side of the inner side surface 37 of the outer wall portion 21 is a sliding surface 39a, and the main body portion 2
It is provided slidably with the sliding surface 39b on the movable plate side of the peripheral surface 27 of 4.

【0025】また図1に示されるように外壁部21のベ
ント面38aのうちの固定金型側のキャビティ形成面に
は圧力センサ40が設けられ、キャビティ7の溶融樹脂
の圧力が測定可能に設けられている。また、圧力センサ
40は鏡面板等の後方に設け、間接的に圧力を測定する
ものでもよい。
As shown in FIG. 1, a pressure sensor 40 is provided on the cavity forming surface on the fixed mold side of the vent surface 38a of the outer wall portion 21 so that the pressure of the molten resin in the cavity 7 can be measured. Has been. Further, the pressure sensor 40 may be provided behind the mirror plate or the like to indirectly measure the pressure.

【0026】次にこの成形装置1を用いたインジェクシ
ョンコンプレッション成形による成形方法および成形品
Pの取出し方法について図1ないし図4により説明す
る。まず可動金型6の外壁部21の移動手段である油圧
シリンダ29のシリンダ側油室32に図示しない油圧回
路により油量が制御して導入されることにより、外壁部
21の本体部24に対する型開閉方向の位置が決定され
る。
Next, a molding method by injection compression molding using this molding apparatus 1 and a method for taking out a molded product P will be described with reference to FIGS. 1 to 4. First, the amount of oil is introduced into the cylinder side oil chamber 32 of the hydraulic cylinder 29, which is the moving means of the outer wall portion 21 of the movable mold 6, by controlling the amount of oil by a hydraulic circuit (not shown). The position in the opening / closing direction is determined.

【0027】次に図示しない型開閉手段により可動金型
6を固定金型3に向け移動させ、図1に示されるよう
に、外壁部21の接合面35を固定金型3の接合面22
に当接させ、両金型のスプル15,ランナー16,ゲー
ト17,キャビティ面18からなるキャビティ形成面を
形成する。そして外壁部21の接合面35が固定金型3
の接合面22に対して50KNないし300KNの圧力
がかかるように油圧シリンダ29のシリンダ側油室32
の油圧が制御される。
Next, the movable mold 6 is moved toward the fixed mold 3 by a mold opening / closing means (not shown), and the joint surface 35 of the outer wall portion 21 is joined to the joint surface 22 of the fixed mold 3 as shown in FIG.
To form a cavity forming surface composed of the sprue 15, the runner 16, the gate 17, and the cavity surface 18 of both molds. The joint surface 35 of the outer wall portion 21 is fixed to the fixed mold 3.
The cylinder side oil chamber 32 of the hydraulic cylinder 29 so that a pressure of 50 KN to 300 KN is applied to the joint surface 22 of
Oil pressure is controlled.

【0028】次に射出装置9からキャビティ7内へ溶融
樹脂を射出充填する。この実施の形態では使用される樹
脂はアクリルが用いられているが、シクロオレフィンポ
リマーやポリカーボネートを用いても良い。またこの実
施の形態のインジェクションコンプレッション成形の場
合、射出時のキャビティ7の容積は、成形品の容積に対
し、5%程度多く設定されており、成形品の容積に対し
て10ないし30%程度多い溶融樹脂が射出される。溶
融樹脂がキャビティ7内の容積以上に射出充填されたこ
とにより、可動金型6の本体部24は型開き側に所定距
離後退し、キャビティ7の容積は拡大されるが、可動金
型6の型開き量は圧締手段によりコントロールされる。
Next, the molten resin is injected and filled from the injection device 9 into the cavity 7. Acrylic is used as the resin used in this embodiment, but cycloolefin polymer or polycarbonate may be used. Further, in the case of the injection compression molding of this embodiment, the volume of the cavity 7 at the time of injection is set to be about 5% larger than the volume of the molded product, and about 10 to 30% larger than the volume of the molded product. Molten resin is injected. Since the molten resin is injected and filled to a volume equal to or larger than the volume inside the cavity 7, the main body portion 24 of the movable mold 6 is retracted toward the mold opening side by a predetermined distance, and the volume of the cavity 7 is expanded. The mold opening amount is controlled by the pressing means.

【0029】射出装置9のスクリューが所定の位置に到
達するか、または所定の時間が経過すると射出が完了し
保圧が開始される。保圧が開始されると、圧締手段であ
る油圧シリンダのラム8により可動金型6の本体部24
が固定金型3に向けて圧締される。この際圧締手段によ
り、油圧シリンダ29により接合面35に加えられてい
る力よりも強力な力を可動金型6の本体部24に及すこ
とにより、外壁部21の本体部24に対する位置が相対
的に後退され、キャビティ7の容積は減少され溶融樹脂
の圧力は上昇する。しかしながら成形の間も油圧シリン
ダ29による圧力も接合面35から固定金型3の接合面
22に及ぼされているため、射出充填された溶融樹脂が
接合面22と35の間から樹脂漏れを起こしてバリ等が
発生することはない。そしてキャビティ7内へ射出充填
された溶融樹脂の一部はキャビティ7内の溶融樹脂が圧
縮されることにより固定金型3の溶融樹脂通路12等へ
逆流する。前記溶融樹脂の逆流は、所定のタイミングで
バルブゲート機構14を閉鎖することにより停止され
る。
When the screw of the injection device 9 reaches a predetermined position or when a predetermined time elapses, injection is completed and pressure holding is started. When the holding pressure is started, the main body portion 24 of the movable mold 6 is moved by the ram 8 of the hydraulic cylinder which is the pressing means.
Are clamped toward the fixed mold 3. At this time, the pressing means exerts a stronger force on the main body portion 24 of the movable mold 6 than the force applied to the joint surface 35 by the hydraulic cylinder 29, whereby the position of the outer wall portion 21 with respect to the main body portion 24 is changed. The cavity 7 is relatively retracted, the volume of the cavity 7 is reduced, and the pressure of the molten resin is increased. However, since the pressure by the hydraulic cylinder 29 is exerted from the joint surface 35 to the joint surface 22 of the fixed mold 3 even during the molding, the molten resin injected and injected causes resin leakage between the joint surfaces 22 and 35. No burr etc. will occur. Then, a part of the molten resin injected and filled into the cavity 7 flows back to the molten resin passage 12 of the fixed mold 3 due to the compression of the molten resin in the cavity 7. The backflow of the molten resin is stopped by closing the valve gate mechanism 14 at a predetermined timing.

【0030】この実施の形態では、キャビティ7内の溶
融樹脂の圧力は圧力センサ40により検出され、キャビ
ティ7内の溶融樹脂の圧力が所定の値に達したことが圧
力センサ40により検出されると、バルブゲート機構1
4が閉鎖され、更にはキャビティ7内の溶融樹脂の圧縮
が停止される。また外壁部21の本体部24に対する相
対的な位置を位置検出センサ34により検出し、所定の
位置に到達したタイミングでバルブゲート機構14の閉
鎖や圧締手段による圧縮を中止するようにしてもよい。
更にタイマーにより所定時間が経過したタイミングでバ
ルブゲート機構14の閉鎖や圧締手段による圧縮を中止
するようにしてもよい。圧縮終了後のキャビティ7内の
溶融樹脂が冷却・固化される間、可動金型6はその位置
で保持される。なおこの実施の形態の金型は固定金型3
側にスタンパ20が取付けられており、インジェクショ
ンコンプレッション成形されることにより、成形品Pに
はスタンパ20によりパターン形成面P2の転写がなさ
れる。なお成形品Pが冷却・固化されている間も油圧シ
リンダ29に加えられる圧力は初期の圧力となるように
制御される。
In this embodiment, the pressure of the molten resin in the cavity 7 is detected by the pressure sensor 40, and the fact that the pressure of the molten resin in the cavity 7 reaches a predetermined value is detected by the pressure sensor 40. , Valve gate mechanism 1
4 is closed, and the compression of the molten resin in the cavity 7 is stopped. Further, the relative position of the outer wall portion 21 with respect to the main body portion 24 may be detected by the position detection sensor 34, and the valve gate mechanism 14 may be closed or the compression by the compression means may be stopped at the timing when the predetermined position is reached. .
Further, the valve gate mechanism 14 may be closed or the compression by the compression means may be stopped at a timing when a predetermined time has elapsed by a timer. The movable die 6 is held at that position while the molten resin in the cavity 7 after the compression is cooled and solidified. The mold of this embodiment is a fixed mold 3
The stamper 20 is attached to the side, and by injection compression molding, the stamper 20 transfers the pattern forming surface P2 to the molded product P. The pressure applied to the hydraulic cylinder 29 is controlled to be the initial pressure even while the molded product P is cooled and solidified.

【0031】図4のからに沿って成形品Pの取出し
手順を説明すると、成形品Pの冷却・固化が完了した図
4のに示される状態から、図4のに示されるように
型開きが行われる。型開き後における可動金型6側のキ
ャビティ形成面の形状は、外壁部21の内側面37のキ
ャビティ形成面と本体部24の固定金型側のキャビティ
形成面とにより、凹状になっており、その内側にランナ
ー、ゲート、スプルを含む成形品Pが残留されている。
この実施の形態では本体部24と外壁部21との間に向
けてエア通路が形成されており、型開きの直前、または
型開き後から図示しないエア供給手段からエア通路26
を経てエアが成形品Pに向けて噴出される。
The procedure for taking out the molded product P will be described with reference to FIG. 4, and from the state shown in FIG. 4 in which the cooling and solidification of the molded product P is completed, as shown in FIG. Done. The shape of the cavity forming surface on the movable mold 6 side after the mold is opened is concave due to the cavity forming surface of the inner side surface 37 of the outer wall portion 21 and the cavity forming surface of the main body portion 24 on the fixed mold side. A molded product P including a runner, a gate, and a sprue remains inside thereof.
In this embodiment, an air passage is formed between the main body portion 24 and the outer wall portion 21, and an air passage 26 is provided from an air supply means (not shown) immediately before or after the mold opening.
After that, air is ejected toward the molded product P.

【0032】そして図4のに示されるように、成形品
の移載機41が固定金型3と可動金型6の間に挿入さ
れ、吸着手段である吸盤43により成形品Pのパターン
形成面P2側が吸着される。次に図4のに示されるよ
うに、油圧シリンダ29のロッド側油室33に送油さ
れ、外壁部21の位置が本体部24に対して相対的に後
退される。このことにより外壁部21のキャビティ形成
面に当接していた成形品Pの側面部P1が外界に開放さ
れる。成形品Pの側面部P1の開放は、成形品Pの取出
しが可能であれば、少なくとも一部が外界に開放される
ものでもよく、全部が開放されるものでもよい。また、
外壁部21の後退による成形品Pの側面部P1の開放と
並行して成形品Pの取出しを行ってもよい。更に外壁部
21の移動に関しては成形品Pの離型時に外壁部側を若
干前進させる工程を含むものでもよい。
Then, as shown in FIG. 4, a transfer device 41 for the molded product is inserted between the fixed mold 3 and the movable mold 6, and a pattern forming surface of the molded product P is formed by a suction cup 43 which is a suction means. The P2 side is adsorbed. Next, as shown in FIG. 4, oil is fed to the rod-side oil chamber 33 of the hydraulic cylinder 29, and the position of the outer wall portion 21 is retracted relative to the main body portion 24. As a result, the side surface portion P1 of the molded product P that was in contact with the cavity forming surface of the outer wall portion 21 is opened to the outside. The side surface portion P1 of the molded product P may be opened at least partially, or may be opened entirely, as long as the molded product P can be taken out. Also,
The molded product P may be taken out in parallel with the opening of the side surface portion P1 of the molded product P due to the retreat of the outer wall portion 21. Further, the movement of the outer wall portion 21 may include a step of slightly advancing the outer wall portion side when the molded product P is released.

【0033】次に図4のに示されるように、移載機4
1が固定金型3側に移動されて成形品Pの取出しが行わ
れる。この際この実施の形態では、成形品PのスプルP
3がエジェクタピン42で突き出しされることにより、
成形品Pの取出しがより一層効率的に行えるようにして
ある。また、エジェクタピン42はキャビティ面18以
外のゲート、ランナー、スプル等の部分に設けられ、キ
ャビティ面18以外の部分を突き出すものであればよ
い。なおエアの噴出およびエジェクタピン42による突
き出しは、必須のものではない。
Next, as shown in FIG. 4, the transfer machine 4
1 is moved to the fixed mold 3 side, and the molded product P is taken out. At this time, in this embodiment, the sprue P of the molded product P is
By ejecting 3 with the ejector pin 42,
The molded product P can be taken out more efficiently. Further, the ejector pin 42 may be provided at a portion other than the cavity surface 18 such as a gate, a runner, a sprue, or the like, as long as the portion other than the cavity surface 18 is projected. The ejection of air and the ejection by the ejector pin 42 are not essential.

【0034】取出された成形品Pは移載機41により図
示しないコンベアに搬出され、図示しないレーザー切断
機等により、ゲート部分から切断がなされる。そして切
断部分が入光面の場合には切断部分は研磨等により仕上
げされる。一方成形装置1は、次の成形に備えて油圧シ
リンダ29が作動され、再度本体部24に対する外壁部
21の位置をキャビティ面18が形成される位置に設定
される。
The molded product P taken out is carried out to a conveyor (not shown) by the transfer machine 41, and cut from the gate portion by a laser cutting machine (not shown). When the cut portion is the light incident surface, the cut portion is finished by polishing or the like. On the other hand, in the molding apparatus 1, the hydraulic cylinder 29 is operated in preparation for the next molding, and the position of the outer wall portion 21 with respect to the main body portion 24 is set again to the position where the cavity surface 18 is formed.

【0035】また、成形品Pの別の成形方法および取出
し手順について図5のからに沿って説明すると、成
形品Pの冷却・固化が完了した図5のに示される状態
から、図5のに示されるように、可動金型6の型開き
が行われる。次に、図5のに示されるように、型開き
とほぼ同時に油圧シリンダ29のロッド側油室33に送
油され、外壁部21の位置が本体部24に対して相対的
に後退される。このことにより外壁部21のキャビティ
形成面に当接していた成形品Pの側面部P1の一部が外
界に開放される。次に図5のに示されるように、外壁
部21のキャビティ形成面と成形品Pの側面部P1の一
部が当接している状態で、移載機41の吸着手段である
吸盤43より成形品Pを吸着する。そして図5のに示
されるように、移載機41が固定金型3側に移動されて
成形品Pの取出しが行われる。
Further, another molding method and take-out procedure of the molded product P will be described with reference to from FIG. 5, from the state shown in FIG. 5 where the cooling and solidification of the molded product P is completed to the one shown in FIG. As shown, the movable mold 6 is opened. Next, as shown in FIG. 5, the oil is fed to the rod-side oil chamber 33 of the hydraulic cylinder 29 almost at the same time as the mold opening, and the position of the outer wall portion 21 is retracted relative to the main body portion 24. As a result, a part of the side surface portion P1 of the molded product P that was in contact with the cavity forming surface of the outer wall portion 21 is opened to the outside. Next, as shown in FIG. 5, while the cavity forming surface of the outer wall portion 21 and a part of the side surface portion P1 of the molded product P are in contact with each other, molding is performed by the suction cup 43 which is the suction means of the transfer machine 41. Adsorb the product P. Then, as shown in FIG. 5, the transfer machine 41 is moved to the fixed mold 3 side, and the molded product P is taken out.

【0036】なお、外壁部21の後退による成形品Pの
側面部P1の開放と並行して吸着手段により成形品Pを
吸着してもよい。また外壁部21は吸着後に成形品Pの
側面部P1と当接しない位置まで後退するものでもよ
い。型開き前に外壁部21を成形品Pの側面部P1と一
部当接している状態の範囲で後退させ、その後可動金型
6の型開きを行い、型開き後に成形品Pを吸着手段によ
り吸着し取出すものであってもよい。
The molded product P may be sucked by the suction means in parallel with the opening of the side surface portion P1 of the molded product P due to the retreat of the outer wall portion 21. The outer wall portion 21 may be retracted to a position where it does not contact the side surface portion P1 of the molded product P after suction. Before the mold opening, the outer wall portion 21 is retracted within a range where it is partially in contact with the side surface portion P1 of the molded product P, the movable mold 6 is then opened, and the molded product P is sucked by the suction means after the mold opening. It may be adsorbed and taken out.

【0037】なお、この実施の形態についてはインジェ
クションコンプレッション成形によるものを記載した
が、インジェクションプレス成形によるものについても
本発明を適用することができる。インジェクションプレ
ス成形の場合、予め型開き量が設定されており、キャビ
ティの容積と同量かキャビティの容積より少ない容積の
溶融樹脂がキャビティ内に射出充填され、その後キャビ
ティ内の溶融樹脂の圧縮がなされ成形品が形成される。
取出し時については、前記したインジェクションコンプ
レッション成形のものと同じである。
Although the injection compression molding is described in this embodiment, the present invention can be applied to the injection press molding. In the case of injection press molding, the mold opening amount is set in advance, the molten resin of the same volume as the cavity volume or a volume smaller than the cavity volume is injected and filled into the cavity, and then the molten resin in the cavity is compressed. A molded product is formed.
At the time of taking out, it is the same as that of the injection compression molding described above.

【0038】次に別の実施例について図6により説明す
る。図6に示される実施例の大型導光板の成形用金型
は、可動金型51の本体部52の周囲の面53に対し外
壁部55が移動手段である油圧シリンダ54により型開
き方向に相対位置制御可能に設けられている点は前の実
施の形態のものと同じである。しかし外壁部55が第一
外壁部56と第二外壁部57からなり、第二外壁部57
のうちの少なくとも一辺(この実施例では四辺全部)が
付勢手段により本体部52に向けて付勢され、型開き方
向に対して略直角方向に位置変更可能に設けられた点で
相違している。
Next, another embodiment will be described with reference to FIG. In the mold for molding the large-sized light guide plate of the embodiment shown in FIG. 6, the outer wall 55 is moved relative to the peripheral surface 53 of the main body 52 of the movable mold 51 in the mold opening direction by a hydraulic cylinder 54 which is a moving means. The point that the position is controllable is the same as in the previous embodiment. However, the outer wall portion 55 is composed of the first outer wall portion 56 and the second outer wall portion 57, and the second outer wall portion 57
At least one side (all four sides in this embodiment) is biased toward the main body 52 by the biasing means, and the position is changeable in a direction substantially perpendicular to the mold opening direction. There is.

【0039】図6に示される実施例で第二外壁部57が
設けられた理由は、実施の形態の金型でも本体部24と
外壁部21との間にもインロー金型ほどの頻度ではない
が、かじりの問題が発生するからである。実施の形態の
例でも本体部24と外壁部21の間にはベント(間隙)
が設けられているが、成形時に可動金型6の特に本体部
24が熱膨張することにより、本体部24と外壁部21
の間のベント(間隙)が所定の間隔に維持されずに狭く
なり、外壁部21が位置変更される際にかじりが起きる
場合がある。
The reason why the second outer wall portion 57 is provided in the embodiment shown in FIG. 6 is not as frequently as the case of the spigot die between the main body portion 24 and the outer wall portion 21 in the die of the embodiment. However, the problem of galling occurs. Also in the example of the embodiment, a vent (gap) is provided between the main body portion 24 and the outer wall portion 21.
However, due to the thermal expansion of the movable mold 6 in particular, the main body portion 24 of the movable mold 6 during the molding is
The vent (gap) between them may be narrowed without being maintained at a predetermined interval, and galling may occur when the position of the outer wall portion 21 is changed.

【0040】そこで、本発明では付勢手段であるバネに
より第二外壁部57を本体部52に向けて付勢すること
により、本体部52に対する外壁部55の位置を成形時
に自動的に変更可能にし、本体部52が熱膨張しても外
壁部55が均等に後退され、本体部52と外壁部55と
の間のベントが所定の間隔に維持され、かじりが発生し
ないように構成されている。なお、図6に示される実施
例で第二外壁部57が位置変更される移動量は20μm
以下であるから、本体部52の熱膨張とキャビティへの
射出充填圧により第二外壁部57の四辺全部が外側に向
けて移動されても第二外壁部57,57の間または第二
外壁部57と本体部52との間から溶融樹脂の漏れを起
こすことはない。
Therefore, in the present invention, the position of the outer wall portion 55 with respect to the main body portion 52 can be automatically changed at the time of molding by urging the second outer wall portion 57 toward the main body portion 52 by the spring as the urging means. The outer wall portion 55 is evenly retracted even if the main body portion 52 is thermally expanded, the vent between the main body portion 52 and the outer wall portion 55 is maintained at a predetermined interval, and galling does not occur. . In the embodiment shown in FIG. 6, the movement amount by which the position of the second outer wall portion 57 is changed is 20 μm.
Because of the following, even if all four sides of the second outer wall portion 57 are moved outward due to thermal expansion of the main body portion 52 and injection filling pressure into the cavity, the space between the second outer wall portions 57, 57 or the second outer wall portion 57 The molten resin does not leak from between 57 and the main body 52.

【0041】図6に示される実施例の構成を具体的に説
明すると、油圧シリンダ54のロッド58には第一外壁
部56が固定されている。第一外壁部56は型開閉方向
に対して移動自在であるが、型開閉方向と略直角方向に
対しては移動しない。第一外壁部56は枠体状の形状で
あり、その可動盤側の内側面には本体部52に対して摺
動自在な摺動面59が形成されている。第一外壁部56
の固定金型側の外側寄りは固定金型60との接合面61
となっている。また第一外壁部56の固定金型側の内側
寄りには凹部62が形成されている。前記凹部62には
本体部52の各辺(ランナー、ゲート等の凸部がある場
合はそれを含む)に対応した各辺からなる第二外壁部5
7が設けられている。
The configuration of the embodiment shown in FIG. 6 will be specifically described. The first outer wall portion 56 is fixed to the rod 58 of the hydraulic cylinder 54. The first outer wall portion 56 is movable in the mold opening / closing direction, but does not move in a direction substantially perpendicular to the mold opening / closing direction. The first outer wall portion 56 has a frame-like shape, and a sliding surface 59 that is slidable with respect to the main body portion 52 is formed on the inner side surface of the movable plate side thereof. First outer wall portion 56
The outer side of the fixed mold side is a joint surface 61 with the fixed mold 60.
Has become. Further, a concave portion 62 is formed on the inner side of the first outer wall portion 56 on the fixed mold side. The second outer wall portion 5 is formed of the respective sides corresponding to the respective sides of the main body 52 (including the convex portions such as runners and gates, if any) in the concave portion 62.
7 is provided.

【0042】第一外壁部56と第二外壁部57のうちの
一辺の関係について説明すると、第一外壁部56には、
外面側から内面側の前記凹部62に向けてボルト孔63
が二箇所に貫設されており、前記ボルト孔63にはそれ
ぞれボルト64が外側から4/5程度まで挿入されてい
る。ボルト孔63の凹部62側にはボルト64の先端部
に当接して外壁部を本体部52に向けて付勢する付勢手
段であるバネ65が前記第二外壁部57に向けてそれぞ
れ挿入されており、バネ65の他端は第二外壁部57の
外側部分に形成された凹部66内に嵌合されている。そ
してボルト64の先端を回動することによりバネ65の
付勢力が調整可能に設けられている。そして第一外壁部
56の第二外壁部側の面67と、第二外壁部57の第一
外壁部側の面68の間隙はキャビティ内に溶融樹脂を射
出充填する前の状態で20μm以下に設定されている。
The relationship between one side of the first outer wall portion 56 and the second outer wall portion 57 will be described.
From the outer surface side toward the concave portion 62 on the inner surface side, the bolt hole 63
Are pierced at two locations, and bolts 64 are inserted into the bolt holes 63 from the outside to about 4/5. Springs 65, which are biasing means for abutting the tips of the bolts 64 and biasing the outer wall portion toward the main body portion 52, are inserted into the concave portion 62 side of the bolt hole 63 toward the second outer wall portion 57, respectively. The other end of the spring 65 is fitted in a recess 66 formed in the outer portion of the second outer wall 57. The biasing force of the spring 65 can be adjusted by rotating the tip of the bolt 64. The gap between the surface 67 of the first outer wall portion 56 on the second outer wall portion side and the surface 68 of the second outer wall portion 57 on the first outer wall portion side is 20 μm or less before injection and filling of the molten resin into the cavity. It is set.

【0043】第二外壁部57の固定金型側は固定金型6
0との接合面69となっており、内側面70のうちの固
定金型側はベント面71aが形成され、本体部52の周
囲の面53のベント面71bの間にベント(間隙)が形
成されている。また第二外壁部57の内側面70のうち
の可動盤側は摺動面72aとなっており、本体部52の
周囲の面53の摺動面72bと摺動自在に設けられてい
る。そして前記ベント面71aの固定金型側の一部は成
形時にはキャビティ形成面を構成する。
The fixed mold side of the second outer wall portion 57 is the fixed mold 6.
It is a joint surface 69 with 0, a vent surface 71a is formed on the fixed mold side of the inner side surface 70, and a vent (gap) is formed between the vent surfaces 71b of the surface 53 around the main body 52. Has been done. Further, the movable plate side of the inner side surface 70 of the second outer wall portion 57 is a sliding surface 72a, and is provided slidably with the sliding surface 72b of the surface 53 around the main body portion 52. A part of the vent surface 71a on the fixed mold side constitutes a cavity forming surface during molding.

【0044】そして可動金型51の本体部52が熱膨張
したときは、本体部52の摺動面72bが第二外壁部5
7の摺動面72aを外側に向けて押圧するが、第二外壁
部57は、付勢手段であるバネ65の付勢力に打ち勝っ
て、開閉方向と略直角方向に外側に向けて位置変更さ
れ、その位置変更分は、前記第一外壁部56と第二外壁
部57との間隙が狭められることにより調整される。そ
して本体部52と第二外壁部57とのベント(間隙)は
可動盤側も固定金型側もほぼ一定のままに保たれる。
When the main body portion 52 of the movable mold 51 is thermally expanded, the sliding surface 72b of the main body portion 52 has the second outer wall portion 5
Although the sliding surface 72a of 7 is pressed outward, the second outer wall portion 57 overcomes the urging force of the spring 65, which is urging means, and is repositioned outward in a direction substantially perpendicular to the opening / closing direction. The position change amount is adjusted by narrowing the gap between the first outer wall portion 56 and the second outer wall portion 57. The vent (gap) between the main body portion 52 and the second outer wall portion 57 is kept substantially constant on both the movable plate side and the fixed mold side.

【0045】なお、第二外壁部57については四辺が移
動可能なものについて記載したが、少なくとも一辺が移
動可能であればよい。更に第二外壁部57は各辺別個の
ものでなく、L字状の二辺の組み合わせからなるもので
もよい。
The second outer wall portion 57 is described as having four sides movable, but it is sufficient if at least one side is movable. Further, the second outer wall portion 57 may not be formed on each side separately, but may be formed by combining two L-shaped sides.

【0046】この金型を用いての成形品Pの成形方法お
よび成形品Pの取出し方法については前記の実施の形態
の取出し方法と同じである。しかし前記第二外壁部57
の本体部52に対する位置を油圧シリンダ54により移
動させる際に、可動金型51の特に本体部52が熱膨張
していても、本体部52と第二外壁部57との間のベン
ト(間隙)が常に所定の間隔の範囲に維持されているか
ら、本体部52と第二外壁部57との間にかじりが起き
る心配がなく、成形品Pの離型のために外壁部55を後
退または前進させることができる。
The method for molding the molded product P and the method for taking out the molded product P using this mold are the same as those in the above-mentioned embodiment. However, the second outer wall portion 57
When the position of the main body 52 with respect to the main body 52 is moved by the hydraulic cylinder 54, even if the main body 52 of the movable mold 51 is particularly thermally expanded, a vent (gap) between the main body 52 and the second outer wall 57 is formed. Is always maintained within a predetermined interval range, there is no risk of galling between the main body portion 52 and the second outer wall portion 57, and the outer wall portion 55 is retracted or moved forward for releasing the molded product P from the mold. Can be made.

【0047】次に図7に示される実施例の大型導光板の
成形用金型は、型開きに伴い、可動金型81の第二外壁
部82が本体部86から外側に向けて型開閉方向と略直
角方向に移動し、同時に第二外壁部82の内側面83の
キャビティ形成面と成形品の側面部が離型されるために
取出しが容易になるものである。なお、図7に示される
実施例も四辺の第二外壁部82が移動するものについて
記載するが、少なくとも一辺が移動可能であればよい。
Next, in the mold for molding the large light guide plate of the embodiment shown in FIG. 7, as the mold is opened, the second outer wall portion 82 of the movable mold 81 is opened and closed in the mold opening and closing direction from the main body 86 toward the outside. And the cavity forming surface of the inner side surface 83 of the second outer wall portion 82 and the side surface portion of the molded product are separated from each other at the same time, so that the removal is facilitated. The embodiment shown in FIG. 7 also describes a case where the second outer wall portions 82 on four sides move, but it is sufficient if at least one side can move.

【0048】図7に示される実施例について、実施の形
態および図6に示される実施例との相違点を中心に説明
すると、本体部86に対し型開閉方向に位置変更制御可
能に設けられる第一外壁部84の各辺の内側の凹部85
にはそれぞれ第二外壁部82が本体部86に対して油圧
シリンダ97により型開閉方向と略直角方向に位置変更
可能に設けられている。一方本体部86の上下側方を含
む周囲の面96の固定金型側にはキャビティ面87の側
面と平行に複数の凹部88がそれぞれ形成されている。
凹部88内にはそれぞれ付勢手段であるバネ89が嵌合
され、バネ89の他端は第二外壁部82の内側面83の
前記凹部88に向かい合う位置に設けられた凹部90内
にそれぞれ嵌合されている。そして第二外壁部82は本
体部86対し外側に向けて付勢され、型開きに伴い前記
バネ89の付勢力により第二外壁部82は本体部86か
ら外側に向けて移動され、第一外壁部84の凹部85の
内側面に押付けられ、本体部86と所定の間隔が形成さ
れるように設けられている。
The embodiment shown in FIG. 7 will be described with a focus on the differences from the embodiment and the embodiment shown in FIG. 6. The position change controllable with respect to the main body 86 in the mold opening / closing direction is provided. Recesses 85 inside each side of one outer wall portion 84
A second outer wall portion 82 is provided on each of the main body portion 86 by a hydraulic cylinder 97 so that the position of the second outer wall portion 82 can be changed in a direction substantially perpendicular to the mold opening / closing direction. On the other hand, a plurality of recesses 88 are formed in parallel with the side surface of the cavity surface 87 on the fixed mold side of the peripheral surface 96 including the upper and lower sides of the main body 86.
A spring 89, which is a biasing means, is fitted in the recess 88, and the other end of the spring 89 is fitted in a recess 90 provided at a position facing the recess 88 on the inner side surface 83 of the second outer wall 82. Have been combined. The second outer wall portion 82 is urged toward the outer side of the main body portion 86, and the second outer wall portion 82 is moved outward from the main body portion 86 by the urging force of the spring 89 with the mold opening, It is provided so as to be pressed against the inner surface of the concave portion 85 of the portion 84 and to form a predetermined distance from the main body portion 86.

【0049】第二外壁部82の固定金型側の内側寄りの
部分は、固定金型91との接合面92となっており、外
側寄りの部分には内側の接合面92から外側に向けて後
退する傾斜面からなる外壁部側案内面93となってい
る。一方固定金型91の接合面94の外側には前記第二
外壁部82の外壁部側案内面93が前進してきた際に当
接する位置に固定金型側案内面95が設けられている。
固定金型側案内面95は外側寄りほど可動金型側に突出
する傾斜面から構成されている。なお第二外壁部82
は、これらの案内面93,95に替えて固定金型に設け
られたアンギュラピンの固定金型側案内面と第二外壁部
に設けられたガイド穴の外壁部側案内面の組み合わせに
より移動させるようにしてもよい。
An inner portion of the second outer wall portion 82 on the fixed die side is a joint surface 92 with the fixed die 91, and an outer portion of the second outer wall portion 82 extends outward from the inner joint surface 92. The outer wall portion side guide surface 93 is an inclined surface that recedes. On the other hand, on the outer side of the joining surface 94 of the fixed mold 91, a fixed mold side guide surface 95 is provided at a position where the outer wall side guide surface 93 of the second outer wall portion 82 abuts when advancing.
The fixed mold side guide surface 95 is composed of an inclined surface protruding toward the movable mold side toward the outer side. The second outer wall portion 82
Is moved by a combination of the fixed mold side guide surface of the angular pin provided on the fixed mold and the outer wall part side guide surface of the guide hole provided on the second outer wall part in place of these guide surfaces 93 and 95. You may do it.

【0050】そして可動金型81の型閉に伴い、第二外
壁部82の外壁部側案内面93が固定金型91の固定金
型側案内面95に摺接され、第二外壁部82はバネ89
の付勢力に抗して本体部86に向けて移動され、キャビ
ティ形成面が構成される(図7における第二外壁部82
が2点鎖線で示される位置に移動)。
When the movable mold 81 is closed, the outer wall side guide surface 93 of the second outer wall part 82 is slidably contacted with the fixed mold side guide surface 95 of the fixed mold 91, and the second outer wall part 82 is Spring 89
Is moved toward the main body 86 against the urging force of the cavity forming surface (the second outer wall portion 82 in FIG. 7).
Moves to the position indicated by the chain double-dashed line).

【0051】そして成形が完了し、型開きが行われる
と、今まで固定金型91の固定金型側案内面95により
本体部86側に移動されていた第二外壁部82は、バネ
89の付勢力により外側に向けて移動し(図7における
第二外壁部82が実線で示される位置へ移動)、第二外
壁部82の内側面83のキャビティ形成面と成形品Pの
側面部P1が離型される。そして移載機により成形品の
取出しが行われる。また図7に示される例について型開
き時の成形品Pの落下を防止するために、成形品Pの下
方の面に当接する第二外壁部82は外側に向けて移動し
ないようにして成形品Pの側面部P1の一部のみが開放
されるようにしてもよい。
When the molding is completed and the mold is opened, the second outer wall portion 82, which has been moved to the main body portion 86 side by the fixed mold side guide surface 95 of the fixed mold 91, moves the spring 89. The urging force moves outward (the second outer wall portion 82 in FIG. 7 moves to the position shown by the solid line), and the cavity forming surface of the inner side surface 83 of the second outer wall portion 82 and the side surface portion P1 of the molded product P are moved. It is released from the mold. Then, the transfer machine takes out the molded product. Further, regarding the example shown in FIG. 7, in order to prevent the molded product P from dropping when the mold is opened, the second outer wall portion 82, which abuts the lower surface of the molded product P, is prevented from moving toward the outside. Only a part of the side surface portion P1 of P may be opened.

【0052】なお図7に示される実施例についても、エ
アの噴出やエジェクトピンによるスプルの突き出しを併
用してもよい。更にこれらの大型導光板の成形方法や成
形用金型は一枚の導光板を成形する金型の例について記
載したが、二枚またはそれ以上の枚数を同時に成形する
ものにも適用できる。
Also in the embodiment shown in FIG. 7, air jetting or sprue ejection by an eject pin may be used together. Further, as the molding method and molding die for these large-sized light guide plates, an example of a die for molding one light guide plate has been described, but it is also possible to apply to molding two or more sheets at the same time.

【0053】[0053]

【発明の効果】大型導光板の成形に際して、外壁部が本
体部に対する型開閉方向の位置変更制御可能に設けられ
た金型を用い、成形品を吸着した後に外壁部を後退さ
せ、成形品を取出すことにより、成形品の側面部を開放
して取出し易くするとともに、成形品を落下させること
なく容易に取出しすることが可能になった。
EFFECTS OF THE INVENTION When molding a large-sized light guide plate, a metal mold is used whose outer wall portion is controllable to change the position in the mold opening / closing direction with respect to the main body. By taking out, it becomes possible to open the side surface of the molded product for easy removal, and it is possible to easily take out the molded product without dropping it.

【0054】また大型導光板の成形に際して、外壁部が
本体部に対する型開閉方向の位置変更制御可能に設けら
れた金型を用い、外壁部のキャビティ形成面と成形品の
側面部の一部が当接している状態で吸着手段により成形
品を吸着し、その後成形品を取出すことによっても、成
形品の側面部を開放して取出し易くするとともに、成形
品を落下させることなく容易に取出しすることが可能に
なった。
Further, when molding a large-sized light guide plate, a mold in which the outer wall portion is provided so that the position change of the mold opening / closing direction with respect to the main body portion can be controlled is used. By adsorbing the molded product with the suction means in the contact state and then removing the molded product, the side surface of the molded product can be opened to facilitate removal, and the molded product can be easily removed without dropping. Became possible.

【0055】また大型導光板の成形に際して、外壁部が
本体部に対する型開閉方向および型開閉方向と略直角方
向の位置変更制御可能に設けられた金型を用い、型開き
に伴い外壁部を本体部から外側に向けて型開閉方向と略
直角方向に移動させることにより、成形品の側面部を開
放して容易に取出しすることが可能になった。
Further, when molding a large-sized light guide plate, a mold in which the outer wall portion is controllable to change the mold opening / closing direction with respect to the main body portion and the position substantially perpendicular to the mold opening / closing direction is used. By moving the mold from the part to the outside in a direction substantially perpendicular to the mold opening / closing direction, the side surface part of the molded product can be opened and easily taken out.

【0056】また上記に加えエジェクタピンにより成形
品のキャビティ以外の部分の突き出しを併用することに
より、導光板に傷をつけずに取出しを行うことができる
ようになった。
In addition to the above, by using the ejector pin to project the portion other than the cavity of the molded product, it is possible to take out the light guide plate without damaging it.

【0057】また、キャビティ内の溶融樹脂の一部を固
定金型の溶融樹脂通路に逆流させ、所定のタイミングで
バルブゲートを閉鎖することにより、インジェクション
コンプレッション成形、およびインジェクションプレス
成形において、大型導光板の厚さの制御が容易になっ
た。
Further, a part of the molten resin in the cavity is caused to flow back into the molten resin passage of the fixed mold, and the valve gate is closed at a predetermined timing, so that a large light guide plate is used in injection compression molding and injection press molding. Control of the thickness of the.

【0058】また更に、外壁部が本体部に対して型開閉
方向と略直角方向に位置変更制御可能に設けられた金型
を用いることにより、成形品の取出しの際に外壁部を後
退、前進させる際に本体部と外壁部との間のかじりの問
題がなくなった。
Furthermore, by using a mold in which the outer wall portion is positionally controllable with respect to the main body portion in a direction substantially perpendicular to the mold opening / closing direction, the outer wall portion is retreated and advanced when the molded product is taken out. There was no problem of galling between the main body and the outer wall when making it.

【0059】また更に接合面と外壁部側案内面を有し、
本体部との間に設けられた付勢手段により外側に向けて
付勢された外壁部が設けられ、型開閉時に外壁部が型開
閉方向と略直角方向に移動可能な金型を用いることによ
り、前記したかじりの問題を解決するとともに、型開き
時には成形品の側面部が開放され、より効率的に成形品
の取出しを行うことが可能になった。
Further, it has a joint surface and an outer wall side guide surface,
By using an outer wall portion that is urged outward by an urging means that is provided between the outer wall portion and the main body portion, and the outer wall portion can move in a direction substantially perpendicular to the mold opening and closing direction when the mold is opened and closed. In addition to solving the above-mentioned problem of galling, the side surface portion of the molded product is opened when the mold is opened, and the molded product can be taken out more efficiently.

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

【図1】本発明の大型導光板の成形方法における導光板
の成形中の断面図である。
FIG. 1 is a cross-sectional view during molding of a light guide plate in a method of molding a large light guide plate according to the present invention.

【図2】本発明の大型導光板の成形方法における導光板
の取出し時の状態を示す断面図である。
FIG. 2 is a cross-sectional view showing a state when the light guide plate is taken out in the method for molding a large-sized light guide plate of the present invention.

【図3】本発明の大型導光板の成形方法に用いる成形用
金型の要部の断面図である。
FIG. 3 is a cross-sectional view of a main part of a molding die used in the method for molding a large-sized light guide plate of the present invention.

【図4】本発明の大型導光板の成形方法における導光板
の取出し手順を示す説明図である。
FIG. 4 is an explanatory view showing a procedure for taking out the light guide plate in the method for molding a large-sized light guide plate of the present invention.

【図5】本発明の大型導光板の成形方法における導光板
の別の取出し手順を示す説明図である。
FIG. 5 is an explanatory view showing another procedure for taking out the light guide plate in the method for molding a large-sized light guide plate of the present invention.

【図6】本発明の別の大型導光板の成形用金型の要部の
断面図である。
FIG. 6 is a sectional view of an essential part of another molding die for a large-sized light guide plate of the present invention.

【図7】本発明の更に別の大型導光板の成形用金型の要
部の断面図である。
FIG. 7 is a cross-sectional view of a main part of a molding die for another large-sized light guide plate of the present invention.

【符号の説明】 1 ……… 成形装置 2 ……… 固定盤 3 ……… 固定金型 4 ……… タイバー 5 ……… 可動盤 6 ……… 可動金型 7 ……… キャビティ 8 ……… ラム 9 ……… 射出装置 10 …… ノズル 11 …… ブッシュ 12 …… 溶融樹脂通路 13 …… マニホールド 14 …… バルブゲート機構 15 …… スプル 16 …… ランナー 17 …… ゲート 18 …… キャビティ面 19 …… 鏡面板 20 …… スタンパ 21 …… 外壁部 22 …… 接合面 24 …… 本体部 25 …… 鏡面板 26 …… エア通路 27 …… 周囲の面 29 …… 油圧シリンダ 30 …… ロッド 31 …… 後面側 32 …… シリンダ側油室 33 …… ロッド側油室 34 …… 位置検出センサ 35 …… 接合面 37 …… 内側面 38a,38b …… ベント面 39a,39b …… 摺動面40 …… 圧力センサ 41 …… 移載機 42 …… エジェクタピン 43 …… 吸盤 P …… 成形品 P1 …… 側面部 P2 …… パターン形成面 P3 …… スプル[Explanation of symbols] 1 ……… Molding equipment 2 ……… Fixed plate 3 ……… Fixed mold 4 ………… Tie bar 5 ……… Movable plate 6 ... Movable mold 7 ……… Cavity 8 ……… Ram 9 ……… Injection device 10 ... Nozzle 11 Bush 12: Molten resin passage 13 ...... Manifold 14 ...... Valve gate mechanism 15 ...... Sprue 16 Runner 17 …… Gate 18 …… Cavity surface 19 Mirror plate 20 …… Stamper 21 ... Outer wall 22 …… Joining surface 24 …… Main body 25 …… Mirror plate 26 …… Air passage 27 ...... Surrounding surface 29 ... Hydraulic cylinder 30 …… Rod 31 …… Rear side 32 ...... Cylinder side oil chamber 33 …… Rod side oil chamber 34 ...... Position detection sensor 35 …… Joining surface 37 ...... Inside surface 38a, 38b ... Vent surface 39a, 39b ...... Sliding surface 40 ...... Pressure sensor 41 …… Transfer machine 42 ...... Ejector pin 43 …… Sucker P: Molded product P1 ... Side part P2 …… Pattern formation surface P3: Sprue

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】可動盤に固定されキャビティ形成面を固定
金型側に有し外壁部を周囲に有する本体部と、本体部に
対する型開閉方向の位置が変更制御可能であって固定金
型との接合面を固定金型側に有しキャビティ形成面を内
側面に有する外壁部とからなる可動金型と、キャビティ
形成面と該キャビティ形成面の外側に前記外壁部の接合
面の対応する接合面とを可動金型側に有する固定金型と
からなる大型導光板の成形用金型が設けられ、前記可動
金型を型閉後、溶融樹脂を前記金型に形成されたキャビ
ティ内に射出充填し、可動金型の本体部を固定金型に向
けて圧締し本体部に対する外壁部の位置を相対的に後退
させ、キャビティ内に射出充填された溶融樹脂を圧縮し
て成形品を得、可動金型を型開き後、移載機の吸着手段
により成形品を吸着し、可動金型の本体部に対する外壁
部の位置を後退させ成形品の側面部の少なくとも一部を
開放させ、成形品を取出すことを特徴とする大型導光板
の成形方法。
1. A fixed mold which is fixed to a movable plate and has a cavity forming surface on the fixed mold side and an outer wall part on the periphery, and a position in the mold opening / closing direction relative to the main body that can be changed and controlled. A movable die having an outer wall portion having a joint surface on the fixed die side and a cavity forming surface on the inner side surface, and corresponding joining of the joint surface of the outer wall portion to the cavity forming surface and the outside of the cavity forming surface. A mold for molding a large-sized light guide plate, which is composed of a fixed mold having a surface and a movable mold side, is provided, and after the movable mold is closed, molten resin is injected into the cavity formed in the mold. After filling, the main body of the movable mold is pressed toward the fixed mold to retreat the position of the outer wall relative to the main body, and the molten resin injected and filled in the cavity is compressed to obtain a molded product. After opening the movable mold, suck the molded product with the suction means of the transfer machine. And, it is opened at least a portion of the side surface portion of the retracting position of the outer wall moldings with respect to the body portion of the movable mold, a molding method for large light guide plate, characterized in that remove the molded article.
【請求項2】可動盤に固定されキャビティ形成面を固定
金型側に有し外壁部を周囲に有する本体部と、本体部に
対する型開閉方向の位置がシリンダにより変更制御可能
であって固定金型との接合面を固定金型側に有しキャビ
ティ形成面を内側面に有する外壁部とからなる可動金型
と、キャビティ形成面と該キャビティ形成面の外側に前
記外壁部の接合面の対応する接合面とを可動金型側に有
する固定金型とからなる大型導光板の成形用金型が設け
られ、前記可動金型を型閉後、溶融樹脂を前記金型に形
成されたキャビティ内に射出充填し、可動金型の本体部
を固定金型に向けて圧締し本体部に対する外壁部の位置
を相対的に後退させ、キャビティ内に射出充填された溶
融樹脂を圧縮して成形品を得、可動金型を型開き後また
は型開き前に、可動金型の本体部に対する外壁部の位置
を後退させ、外壁部のキャビティ形成面と成形品の側面
部の一部が当接している状態で移載機の吸着手段により
成形品を吸着し、その後成形品を取出すことを特徴とす
る大型導光板の成形方法。
2. A fixed metal mold which is fixed to a movable plate and has a cavity forming surface on the fixed mold side and an outer wall part on the periphery, and the position of the mold opening and closing direction with respect to the main body part can be changed and controlled by a cylinder. Correspondence of a movable mold having a joint surface with the mold on the fixed mold side and an outer wall portion having a cavity forming surface on the inner side surface, and a joint surface of the outer wall portion on the outside of the cavity forming surface and the cavity forming surface. A mold for molding a large-sized light guide plate, which includes a fixed mold having a joint surface on the movable mold side, is provided, and after the movable mold is closed, a molten resin is formed in the mold cavity. Injection molding, and the body part of the movable mold is clamped toward the fixed mold to relatively retract the position of the outer wall part with respect to the body part, and the molten resin injected and filled in the cavity is compressed to form a molded product. After opening the movable mold or before opening the mold, The position of the outer wall with respect to the main body of the mold is set back, and the molded product is sucked by the suction means of the transfer machine while the cavity forming surface of the outer wall and a part of the side surface of the molded product are in contact, then A method for molding a large-sized light guide plate, which comprises taking out a molded product.
【請求項3】可動盤に固定されキャビティ形成面を固定
金型側に有し外壁部を周囲に有する本体部と、本体部に
対する型開閉方向の位置が変更制御可能かつ本体部との
間に設けられた付勢手段により外側に向けて付勢され型
開閉方向と略直角方向の位置が変更可能であって固定金
型との接合面を固定金型側に有しキャビティ形成面を内
側面に有する外壁部とからなる可動金型と、キャビティ
形成面と該キャビティ形成面の外側に前記外壁部の接合
面の対応する接合面とを可動金型側に有する固定金型と
からなる大型導光板の成形用金型が設けられ、前記金型
の型閉に伴い、外壁部を本体部に向けて型開閉方向と略
直角方向に移動させキャビティを構成し、溶融樹脂を前
記金型に形成されたキャビティ内に射出充填し、可動金
型の本体部を固定金型に向けて圧締し本体部に対する外
壁部の位置を相対的に後退させ、キャビティ内に射出充
填された溶融樹脂を圧縮して成形品を得、型開きに伴
い、外壁部を本体部から外側に向けて型開閉方向と略直
角方向に移動させ、成形品の側面部の少なくとも一部を
開放させ、成形品を取出すことを特徴とする大型導光板
の成形方法。
3. A main body part fixed to a movable plate and having a cavity forming surface on the fixed mold side and an outer wall part on the periphery, and a position in the mold opening / closing direction with respect to the main body part, which is changeable and controllable, between the main body part. It is urged outward by the urging means provided and its position in the direction substantially perpendicular to the mold opening / closing direction can be changed, and the joint surface with the fixed mold is provided on the fixed mold side, and the cavity forming surface is the inner surface. A large mold including a movable mold having an outer wall portion provided in the movable mold, and a fixed mold having a cavity forming surface and a corresponding joint surface of the joint surface of the outer wall portion outside the cavity forming surface on the movable mold side. A mold for molding the light plate is provided, and when the mold is closed, the outer wall is moved toward the main body in a direction substantially perpendicular to the mold opening / closing direction to form a cavity, and molten resin is formed in the mold. It is injected and filled in the prepared cavity, and the main body of the movable mold is fixed. The outer wall is relatively retracted with respect to the main body by pressing it toward the mold, and the molten resin injected and filled in the cavity is compressed to obtain a molded product. A method for molding a large-sized light guide plate, characterized in that the molded article is taken out by moving it toward the outside in a direction substantially perpendicular to the mold opening / closing direction to open at least a part of the side surface of the molded article.
【請求項4】前記可動金型にはキャビティに連通してゲ
ートとランナーとスプルが設けられ、型開き後、可動金
型に設けられたエジェクタピンにより成形品のキャビテ
ィ以外の部分を突き出すことにより成形品を取り出すこ
とを特徴とする請求項1ないし3に記載の大型導光板の
成形方法。
4. The movable mold is provided with a gate, a runner and a sprue communicating with the cavity, and after the mold is opened, a portion other than the cavity of the molded product is projected by an ejector pin provided on the movable mold. The method for molding a large light guide plate according to claim 1, wherein a molded product is taken out.
【請求項5】可動盤に固定されキャビティ形成面を固定
金型側に有し外壁部を周囲に有する本体部と、本体部に
対する型開閉方向の位置が変更制御可能であって固定金
型との接合面を固定金型側に有しキャビティ形成面を内
側面に有する外壁部とからなる可動金型と、キャビティ
形成面と該キャビティ形成面の外側に前記外壁部の接合
面の対応する接合面とを可動金型側に有し、キャビティ
に連通する溶融樹脂通路にはホットランナ機構とバルブ
ゲート機構を有する固定金型とからなる大型導光板の成
形用金型が設けられ、前記可動金型を型閉後、溶融樹脂
を前記金型に形成されたキャビティ内に射出充填し、可
動金型の本体部を固定金型に向けて圧締し本体部に対す
る外壁部の位置を相対的に後退させ、キャビティ内に射
出充填された溶融樹脂を圧縮し、溶融樹脂の一部を固定
金型の溶融樹脂通路に逆流させ、所定のタイミングでバ
ルブゲートを閉鎖することを特徴とする大型導光板の成
形方法。
5. A fixed mold which is fixed to a movable plate and has a cavity forming surface on the fixed mold side and an outer wall part on the periphery, and a position in the mold opening / closing direction relative to the main body that can be controlled to be changed. A movable die having an outer wall portion having a joint surface on the fixed die side and a cavity forming surface on the inner side surface, and corresponding joining of the joint surface of the outer wall portion to the cavity forming surface and the outside of the cavity forming surface. And a surface on the side of the movable mold, and a molten resin passage communicating with the cavity is provided with a mold for molding a large light guide plate including a fixed mold having a hot runner mechanism and a valve gate mechanism. After closing the mold, the molten resin is injected and filled in the cavity formed in the mold, and the main body of the movable mold is pressed toward the fixed mold so that the position of the outer wall portion is relatively to the main body. Melted by retreating and injection filling into the cavity Compressing the fat, to flow back part of the molten resin in the molten resin passage of the stationary mold, a molding method for large light guide plate, characterized in that to close the valve gate at a predetermined timing.
【請求項6】可動盤に固定されキャビティ形成面を固定
金型側に有し外壁部を周囲に有する本体部と、本体部に
対する型開閉方向の位置がシリンダにより変更制御可能
であって固定金型との接合面を固定金型側に有しキャビ
ティ形成面を内側面に有する外壁部とからなる可動金型
と、キャビティ形成面と該キャビティ形成面の外側に前
記外壁部の接合面の対応する接合面とを有する固定金型
とからなる大型導光板の成形用金型であって、前記外壁
部の内側面の固定金型側には成形時に一部がキャビティ
形成面を構成するベント面が形成され、前記内側面の可
動盤側には本体部との摺動面が形成されるとともに、前
記外壁部の少なくとも一辺は付勢手段により本体部に向
けて付勢され型開閉方向と略直角方向に位置変更可能に
設けられていることを特徴とする大型導光板の成形用金
型。
6. A fixed metal mold which is fixed to a movable plate and has a cavity forming surface on the fixed mold side and an outer wall part on the periphery, and the position of the mold opening and closing direction with respect to the main body part can be changed and controlled by a cylinder. Correspondence of a movable mold having a joint surface with the mold on the fixed mold side and an outer wall portion having a cavity forming surface on the inner side surface, and a joint surface of the outer wall portion on the outside of the cavity forming surface and the cavity forming surface. A mold for molding a large-sized light guide plate, which comprises a fixed mold having a bonding surface for forming a cavity surface at the time of molding on the fixed mold side of the inner surface of the outer wall portion. Is formed, and a sliding surface with the main body is formed on the movable plate side of the inner surface, and at least one side of the outer wall is urged toward the main body by the urging means and is substantially in the mold opening / closing direction. It is provided so that the position can be changed in the right angle direction. Mold of a large light guide plate, wherein.
【請求項7】可動盤に固定されキャビティ形成面を固定
金型側に有し外壁部を周囲に有する本体部と、本体部に
対する型開閉方向の位置が変更制御可能であって固定金
型との接合面を固定金型側に有しキャビティ形成面を内
側面に有する外壁部とからなる可動金型と、キャビティ
形成面と該キャビティ形成面の外側に前記外壁部の接合
面の対応する接合面とを有する固定金型とからなる大型
導光板の成形用金型であって、前記可動金型の外壁部は
少なくとも一辺が本体部との間に設けられた付勢手段に
より外側に向けて付勢されるとともに固定金型側には外
壁部側案内面が設けられ、一方固定金型には前記外壁部
の外壁部側案内面に対応した固定金型側案内面が設けら
れ、可動金型を型閉する際に両案内面が摺接されること
により外壁部が内側に向けて移動し、外壁部の内側面に
よってキャビティ形成面が形成され、可動金型が型開き
する際に前記付勢手段による付勢力により外壁部が外側
に向けて移動し、成形品の側面部の少なくとも一部が開
放されることを特徴とする大型導光板の成形用金型。
7. A main body which is fixed to a movable plate and has a cavity forming surface on the side of the fixed mold and an outer wall part on the periphery, and a fixed mold whose position in the mold opening / closing direction with respect to the main body is changeable. A movable die having an outer wall portion having a joint surface on the fixed die side and a cavity forming surface on the inner side surface, and corresponding joining of the joint surface of the outer wall portion to the cavity forming surface and the outside of the cavity forming surface. A mold for molding a large-sized light guide plate comprising a fixed mold having a surface, and the outer wall portion of the movable mold has at least one side directed toward the outside by a biasing means provided between the outer wall portion and the main body portion. An outer wall side guide surface is provided on the fixed mold side while being urged, while a fixed mold side guide surface corresponding to the outer wall side guide surface of the outer wall part is provided on the fixed mold side. When the mold is closed, both guide surfaces are in sliding contact so that the outer wall is The inner wall surface of the outer wall portion forms a cavity forming surface, and when the movable mold is opened, the outer wall portion moves outward due to the urging force of the urging means. A mold for molding a large light guide plate, characterized in that at least a part of the portion is opened.
JP2001348822A 2001-11-14 2001-11-14 Large light guide plate molding method and large light guide plate molding die Expired - Fee Related JP3878001B2 (en)

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