JPH07100878A - Method and device for in-mold vibration processing - Google Patents
Method and device for in-mold vibration processingInfo
- Publication number
- JPH07100878A JPH07100878A JP5271212A JP27121293A JPH07100878A JP H07100878 A JPH07100878 A JP H07100878A JP 5271212 A JP5271212 A JP 5271212A JP 27121293 A JP27121293 A JP 27121293A JP H07100878 A JPH07100878 A JP H07100878A
- Authority
- JP
- Japan
- Prior art keywords
- punch
- mold
- plate
- product
- vibration
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/568—Applying vibrations to the mould parts
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プラスチックの射出成
形機および射出成形方法に関し、特に射出成形中に、金
型内に理想的な状態で光学レンズ、プリズム、反射鏡等
の光学部品、小型精密歯車等の精密機械部品等を成形す
るための金型内振動加工方法及び加工装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic injection molding machine and injection molding method, and more particularly to an optical component such as an optical lens, a prism or a reflecting mirror in an ideal state in a mold during injection molding, and a small size. The present invention relates to an in-mold vibration machining method and machining device for molding precision mechanical parts such as precision gears.
【０００２】[0002]
【従来の技術】従来より、量産が簡単な射出成形によっ
て光学レンズ、プリズム、反射鏡等の光学部品あるいは
小型歯車等の精密機械部品等が成形量産されている。し
かし、従来の射出成形機では高い成形精度のものが得ら
れず、射出成形で得られる製品の品質は中級あるいは低
級のものに限られている。このため、射出成形機におい
て高精度の成形品を得るための種々の提案がなされてい
る。そこで、寸法的な精度はもちろんのこと内部の材料
の歪み等もその品質に多大な影響を与えるレンズについ
てみると、従来のものでは、ゲート部近傍の残留応力の
発生、あるいは成形金型内での溶融樹脂の冷却固化時の
樹脂の収縮により金型の製品への転写性が低下し、所望
の精度を得ることができない。そして、転写性の改善の
ため射出圧力を高くすると、型締め力の大きな成形機が
必要となったり、剛性の高い金型が必要となりコスト高
となる。又、高精度な金型温度調整を行い冷却時間を長
くすることによっても転写性が改善されるが、成形サイ
クルが長くなりすぎて実用に適さない等の問題があっ
た。2. Description of the Related Art Conventionally, optical parts such as optical lenses, prisms and reflecting mirrors, or precision mechanical parts such as small gears have been molded and mass-produced by injection molding, which is easy to mass-produce. However, conventional injection molding machines cannot obtain high molding precision, and the quality of products obtained by injection molding is limited to intermediate or low quality. For this reason, various proposals have been made for obtaining highly accurate molded products in an injection molding machine. So, let's look at a lens that not only has dimensional accuracy but also the distortion of the material inside it has a great effect on its quality. With conventional lenses, residual stress occurs near the gate, or inside the molding die. Due to the shrinkage of the molten resin during the cooling and solidification of the resin, the transferability of the mold to the product is reduced, and the desired accuracy cannot be obtained. If the injection pressure is increased to improve transferability, a molding machine having a large mold clamping force is required, and a mold having high rigidity is required, resulting in high cost. Further, the transferability is improved by adjusting the mold temperature with high accuracy and lengthening the cooling time, but there is a problem that the molding cycle becomes too long and it is not suitable for practical use.
【０００３】そこで、「実用プラスチックレンズ」第１
２４頁乃至第１２８頁記載の「６．５スプルー・ランナ
・ゲートの設計」（日刊工業新聞社 １９８９年１２月
２５日発行）においては、ゲート部では分子配向等の内
部歪みによって応力が発生するとして、ゲート部を特殊
な２個のゲートを直列に設け樹脂流入時の分子配向等の
内部歪の原因である流入初期の樹脂によって生じるスキ
ン層が成形品へ及ばないようにして均質化をはかる、い
わゆるＡＵゲートと呼ばれるものが開示されている。し
かし、この場合のゲート形状は複雑な形状となり金型の
加工も困難である。特に多数個取りの場合には各々の成
形品のゲート部にこの特殊なゲートを設けねばならず金
型がさらに複雑になるという問題があった。また、成形
品間の精度や材質を均質にするために成形品の位置やラ
ンナ配列等バランスよく配置しなければならないため、
一つの金型ではせいぜい８個程度のものが限界であり量
産性に欠けるという問題があった。Therefore, "Practical Plastic Lens" No. 1
In "6.5 Sprue Runner Gate Design" (pp. 24 to 128) (published by Nikkan Kogyo Shimbun, December 25, 1989), stress is generated in the gate portion due to internal strain such as molecular orientation. As a result, two special gates are provided in series so that the skin layer generated by the resin at the initial stage of inflow, which causes internal strain such as molecular orientation when the resin inflows, does not reach the molded product for homogenization. A so-called AU gate is disclosed. However, the gate shape in this case is complicated and it is difficult to process the mold. In particular, in the case of taking a large number of molds, there is a problem that the mold has to be further complicated because the special gate must be provided in the gate portion of each molded product. Also, in order to make the accuracy and material quality among the molded products uniform, it is necessary to arrange the positions of the molded products and the runner arrangement in a well-balanced manner.
There is a problem that the number of molds in one mold is at most 8 and the mass productivity is insufficient.
【０００４】また、特開平４−１７６６２３号公報にお
いては、成形品を上下一組の振動コアで挟み、この振動
コアを出退方向に振動させて射出圧縮成形を行い成形品
の精度向上、残留応力の大幅低減をはかるようにしたも
のが開示されている。しかし、ゲート部が存在するので
ゲート部近傍の残留応力が残ること、成形後のゲート処
理が必要である等の問題があった。Further, in Japanese Unexamined Patent Publication No. 4-176623, a molded product is sandwiched by a pair of upper and lower vibrating cores, and the vibrating cores are vibrated in a moving direction to perform injection compression molding, thereby improving accuracy of the molded product and remaining It is disclosed that the stress is remarkably reduced. However, since the gate portion is present, there are problems that residual stress in the vicinity of the gate portion remains, and gate processing after molding is necessary.
【０００５】そこで、成形加工第１巻第１号第１０４頁
乃至第１１１頁記載の「プラスチックレンズの振動熱成
形」（１９８９年プラスチック成形加工学会発行）にお
いては、複雑な金型を不要とし、成形時の残留応力の影
響を避けるため、すでに成形された板状のプラスッチッ
ク材を振動プレスによって成形するものが開示されてい
る。しかし、一度板状のプラスチックを成形した後に改
めて振動プレス加工するので工程が増えるという問題が
ある。さらに、一度射出成形済みのものを使用するので
使用する素材の種類に制限があり、また、内部歪を完全
に取り除くことは困難で成形品の転写精度にもやや難が
あった。Therefore, in the "vibration thermoforming of plastic lenses" (published by Japan Society of Plastic Molding Processing in 1989) described in Molding Volume 1, No. 1, pp. 104 to 111, a complicated mold is not required, In order to avoid the influence of residual stress during molding, a plate-shaped plastic material that has already been molded is molded by a vibration press. However, there is a problem in that the number of steps is increased because the plate-shaped plastic is once molded and then vibration-pressed again. Further, since the material that has already been injection-molded is used, there is a limitation in the type of material to be used, and it is difficult to completely remove the internal distortion, and the transfer accuracy of the molded product is somewhat difficult.
【０００６】本発明は、従来の技術の有するこのような
問題点に鑑みてなされたものであり、その目的とすると
ころは、内部歪みがなく、かつ転写性の良い高精度の成
形品を得られ、しかも、ゲート近傍の残留応力の影響を
無くし、ゲート処理や、取扱も簡単で量産が可能な射出
成形機の金型内振動加工方法および加工装置を提供しよ
うとするものである。The present invention has been made in view of the above problems of the prior art. The object of the present invention is to obtain a high-precision molded product having no internal distortion and good transferability. In addition, it is an object of the present invention to provide an in-mold vibration machining method and a machining apparatus for an injection molding machine which eliminates the influence of residual stress in the vicinity of the gate and is easy to handle and can be mass-produced.
【０００７】[0007]
【課題を解決するための手段】このため本発明は、固定
金型と可動金型とを有する射出成形機において、固定金
型または可動金型は板状のキャビティと板状キャビティ
に樹脂を注入するゲート部とを設ける。可動金型には板
状キャビティに突入可能にされ突入方向に振動可能な第
１のパンチと該第１のパンチが摺動可能に挿入された金
型内穴が設ける。固定金型には板状キャビティを挟んで
第１のパンチと対抗して第１のパンチと従動／同期可能
な第２のパンチと該第２のパンチが摺動可能に挿入され
た金型内穴とを設ける。そして、少なくともパンチの一
方の突入面には成形品表面に転写されるべく製品成形形
状部を設ける。Therefore, according to the present invention, in an injection molding machine having a fixed mold and a movable mold, the fixed mold or the movable mold injects a resin into the plate-shaped cavity and the plate-shaped cavity. And a gate portion to be provided. The movable mold is provided with a first punch that is capable of plunging into the plate-shaped cavity and is capable of vibrating in the plunging direction, and a die inner hole into which the first punch is slidably inserted. In the fixed die, a second punch capable of being driven / synchronized with the first punch and sandwiching the plate-like cavity and sandwiching the plate-like cavity, and a die in which the second punch is slidably inserted Make a hole and. Then, at least one of the punching surfaces of the punch is provided with a product molding shape portion so as to be transferred to the surface of the molded product.
【０００８】第１及び第２のパンチは板状キャビティに
樹脂を注入するゲート部とは離れた位置に設けるのが効
果的である。It is effective to provide the first and second punches at positions apart from the gate portion for injecting the resin into the plate-shaped cavity.
【０００９】一度に多数個の製品部を成形するためには
第１及び第２のパンチを複数個設ける。A plurality of first and second punches are provided to form a large number of product parts at one time.
【００１０】射出成形にあたっては、射出充填中、又は
射出充填後、又はゲートシールが完了した後に、又は保
圧過程中に、又は／及び保圧完了後冷却中に、第１のパ
ンチに微小振動を与え、この振動エネルギーによって板
状キャビティに充填された樹脂板のパンチ近傍部を軟化
し、又は固化を制御し充分軟化した時点で第１のパンチ
を強制的に変位させて圧縮を行うようにする。In injection molding, during the injection filling, after the injection filling, or after the gate seal is completed, or during the pressure holding process, and / or during the cooling after the pressure holding is completed, a minute vibration is applied to the first punch. By virtue of this vibration energy, the vicinity of the punch of the resin plate filled in the plate-like cavity is softened, or solidification is controlled so that the first punch is forcibly displaced and compressed when sufficiently softened. To do.
【００１１】さらに、パンチを強制的に変位させた後パ
ンチに微小振動を与えながらパンチの製品成形形状部を
製品部の成形面に少なくとも短時間当接させるとよい。Furthermore, after the punch is forcibly displaced, it is advisable that the product molding shape portion of the punch is brought into contact with the molding surface of the product portion for at least a short time while applying minute vibration to the punch.
【００１２】また、パンチを強制的に変位させた後、第
１の又は／及び第２のパンチに微小振動を与え、この振
動エネルギーによってパンチ近傍のプラスチックを軟化
し、充分軟化した時点で前記第１の又は／及び第２のパ
ンチを強制的に変位させ樹脂板より製品部を打ち抜くの
がよい。Further, after the punch is forcibly displaced, a minute vibration is applied to the first or / and the second punch, and the vibration energy softens the plastic in the vicinity of the punch. It is preferable to forcibly displace the first punch and / or the second punch and punch the product portion from the resin plate.
【００１３】パンチを強制的に変位させて製品部を打ち
抜いた後、パンチに微小振動を与えながら製品部側面を
いづれかの金型穴内周面に少なくとも短時間だけ当接さ
せるとよい。After forcibly displacing the punch to punch out the product portion, it is advisable to bring the side surface of the product portion into contact with the inner peripheral surface of any one of the mold holes for at least a short time while applying minute vibration to the punch.
【００１４】パンチの金型穴内周面への短時間当接後、
パンチを強制的に変位させて製品部を打ち抜いた元の樹
脂板へインサートするようにすれば、スプル、ランナー
と共に取り出すことが可能となる。After a short time contact of the punch with the inner peripheral surface of the die hole,
By forcibly displacing the punch and inserting the punched product into the original resin plate, the product can be taken out together with the sprue and runner.
【００１５】[0015]
【作用】固定金型または可動金型は板状のキャビティと
板状キャビティに樹脂を注入するゲート部とを設けてい
るので、金型への注入樹脂がゲート部から板状キャビテ
ィに注入され樹脂が板状に充填される。可動金型の板状
キャビティに突入可能にされ突入方向に振動可能な第１
のパンチが板状に充填された樹脂板に当接し樹脂を圧縮
する。固定金型の板状キャビティつまり樹脂板を挟んで
第１のパンチと対抗する第２のパンチが第１のパンチと
適宜の寸法で従動あるいは同期可能に制御される。そし
て、樹脂板の第１のパンチと第２のパンチとで挟持され
た樹脂部分は両パンチの当接面形状が転写され所定寸法
に成形される。なお、この第１及び第２パンチとで挟持
された樹脂部分が製品部であり、ゲート部等を含み樹脂
板の余剰部分は製品抜きカスであり、原則として不要部
分である。Since the fixed mold or the movable mold is provided with the plate-shaped cavity and the gate part for injecting the resin into the plate-shaped cavity, the resin injected into the mold is injected into the plate-shaped cavity from the gate part. Are packed in a plate shape. The first that is capable of plunging into the plate-shaped cavity of the movable mold and can vibrate in the plunging direction
The punch comes into contact with the resin plate filled in a plate shape to compress the resin. The plate-shaped cavity of the fixed mold, that is, the second punch that opposes the first punch with the resin plate sandwiched therebetween is controlled so that it can be driven or synchronized with the first punch with an appropriate size. Then, in the resin portion sandwiched by the first punch and the second punch of the resin plate, the contact surface shape of both punches is transferred and molded into a predetermined size. The resin portion sandwiched by the first and second punches is a product portion, and the surplus portion of the resin plate including the gate portion and the like is a product removal scrap, which is an unnecessary portion in principle.
【００１６】第１及び第２のパンチは板状キャビティに
樹脂を注入するゲート部とは離れた位置に設けるように
すると、樹脂がゲート部を通過する際に生じるゲート付
近の残留応力があっても、第１及び第２のパンチで成形
される製品部までには残留応力等が達しないので、残留
応力の影響がなく、製品部の樹脂は内部応力歪のない均
一なものとなる。If the first and second punches are provided at positions apart from the gate portion for injecting the resin into the plate-like cavity, there is residual stress near the gate that occurs when the resin passes through the gate portion. However, since residual stress or the like does not reach the product portion formed by the first and second punches, there is no influence of the residual stress and the resin of the product portion is uniform without internal stress strain.
【００１７】ゲート部と樹脂板の周辺部を除いて複数個
の第１及び第２のパンチを設ければ一度の射出工程で大
量の製品部の成形ができる。If a plurality of first and second punches are provided except for the gate portion and the peripheral portion of the resin plate, a large amount of product portions can be molded by a single injection process.
【００１８】射出充填中、又は射出充填後のゲートシー
ルが完了した後に、又は保圧過程中に、又は／及び保圧
完了後冷却中に、第１のパンチに微小振動を与えるよう
にすると、この振動エネルギーによって板状キャビティ
に充填された樹脂板のパンチ近傍部が軟化し樹脂が塑性
変形しやすくなる。又、この振動エネルギーによって樹
脂板のパンチ近傍部の冷却速度を遅くすることによって
樹脂の固化を制御することが可能である。そして、樹脂
板が充分軟化した、またはしている時点で第１のパンチ
を強制的に変位させて圧縮を行う。そして、射出成形中
の温度は比較的高いので樹脂の流動性も高く、また、温
度も樹脂板全体でほぼ均一にされており、かつ振動エネ
ルギーを与えられたパンチ近傍部の温度との温度差も小
さいので、型冷却時等の局部的な収縮も小さく、樹脂板
の成形品は極めて均質となり、パンチの当接面の転写精
度も高いものとなる。When the first punch is subjected to microvibration during injection filling, or after completion of the gate seal after injection filling, or during the pressure holding process, and / or cooling after the pressure holding is completed, The vibration energy softens the vicinity of the punch of the resin plate filled in the plate-like cavity, and the resin is easily plastically deformed. Further, it is possible to control the solidification of the resin by slowing the cooling rate of the vicinity of the punch of the resin plate by this vibration energy. Then, when the resin plate is sufficiently softened or is being softened, the first punch is forcibly displaced to perform compression. Since the temperature during injection molding is relatively high, the fluidity of the resin is also high, and the temperature is almost uniform over the entire resin plate, and there is a temperature difference from the temperature in the vicinity of the punch where vibration energy is applied. Since the shrinkage is small, the local shrinkage at the time of cooling the mold is small, the molded product of the resin plate becomes extremely homogeneous, and the transfer accuracy of the contact surface of the punch becomes high.
【００１９】さらに、パンチを強制的に変位させた後パ
ンチに微小振動を与えながらパンチの製品成形形状部を
製品部の成形面に少なくとも短時間当接させると、当接
面でさらに再成形され、パンチの当接面の転写精度は極
めて高いものとなる。Furthermore, after the punch is forcibly displaced and then the product forming shape portion of the punch is brought into contact with the forming surface of the product portion for at least a short time while giving minute vibration to the punch, it is re-formed on the contact surface. The transfer accuracy of the punch contact surface is extremely high.
【００２０】また、パンチを強制的に変位させた後、第
１の又は／及び第２のパンチに微小振動を与え、この振
動エネルギーによってパンチ近傍のプラスチックを軟化
し、充分軟化した時点で前記第１の又は／及び第２のパ
ンチを強制的に変位させると、軟化部分のみにせん断力
が働くので、製品部の形状に殆ど影響を与えることなく
製品部が樹脂板より綺麗に打ち抜かれる。Further, after the punch is forcibly displaced, a minute vibration is applied to the first or / and the second punch, and the plastic near the punch is softened by this vibration energy. When the first punch and / or the second punch is forcibly displaced, a shearing force acts only on the softened portion, so that the product portion can be punched out cleanly from the resin plate with almost no influence on the shape of the product portion.
【００２１】パンチを強制的に変位させて製品部を打ち
抜いた後、パンチに微小振動を与えながら製品部側面を
いづれかの金型穴内周面に少なくとも短時間だけ当接さ
せれば、金型穴内周面がそのまま製品部側面に転写され
るので、金型穴内周面精度を良くしておけば充分精度の
高い製品部側面形状を得ることができる。After punching the product part by forcibly displacing the punch, if the side face of the product part is brought into contact with the inner peripheral surface of any of the mold holes for at least a short time while giving minute vibration to the punch, Since the peripheral surface is transferred to the side surface of the product as it is, if the accuracy of the inner peripheral surface of the die hole is improved, the side surface shape of the product section with sufficiently high accuracy can be obtained.
【００２２】パンチの金型穴内周面への短時間当接後、
パンチを原位置に復帰させ、金型を開くと、製品部は樹
脂板から分離して取り出すことが可能である。しかし、
製品部がばらばらでは取扱が煩雑となる。ところで、元
の樹脂板の製品部の抜けた穴は、前述のパンチの金型穴
内周面への短時間当接時に一方のパンチが当接している
から、製品部側面と同様に精度の高い抜き面となってい
る。そこで、パンチを強制的に変位させて製品部を打ち
抜いた元の樹脂板へ再インサートすることができる。よ
って、製品部を樹脂板に再インサートすることにより、
製品部と樹脂板とを一体として取り扱うことができるの
で、金型開時に、製品部を脱落させることなくスプル、
ランナー、樹脂板とともに取り出すことができる。ま
た、インサートの際に、戻す量つまりインサート代によ
って成形取り出し後の樹脂板と製品部との分離させる力
を調整できる。After a short time contact of the punch with the inner peripheral surface of the die hole,
When the punch is returned to the original position and the die is opened, the product part can be separated from the resin plate and taken out. But,
If the product parts are separate, handling becomes complicated. By the way, the hole in the product part of the original resin plate is as accurate as the side surface of the product part because one of the punches is in contact with the inner peripheral surface of the die hole for a short time. It is a blank surface. Therefore, the punch can be forcibly displaced and re-inserted into the original resin plate where the product portion has been punched out. Therefore, by re-inserting the product part into the resin plate,
Since the product part and the resin plate can be handled as one, sprue without dropping the product part when the mold is opened,
It can be taken out together with the runner and resin plate. Further, at the time of inserting, the force for separating the resin plate and the product portion after the molding and taking out can be adjusted by the returning amount, that is, the insert allowance.
【００２３】[0023]
【実施例】次に本発明の実施例につき図面を参照して説
明すると、図１は１個取りの場合の金型内振動加工装置
の要部断面図を示し、図２は、本発明によって射出成形
された成形品を可動金型側より見た説明図を示す。図３
乃至図６は本発明の加工状態を示す説明図である。各図
において、図３は、加工前の状態、図４は、圧縮加工し
た状態、図５は、切断した状態、図６は、打ち抜きを行
った板へ製品をインサートした状態を示す。また、製品
加工数は一箇所の場合を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a main part of an in-mold vibration machining apparatus in the case of taking one piece, and FIG. The explanatory view which looked at a molded article injection-molded from the movable metallic mold side is shown. Figure 3
6 to 7 are explanatory views showing the processed state of the present invention. In each figure, FIG. 3 shows a state before processing, FIG. 4 shows a compressed state, FIG. 5 shows a cut state, and FIG. 6 shows a state where a product is inserted into a punched plate. Also, the number of processed products is one.
【００２４】図１において、金型は、固定金型２と可動
金型１とを含み、両金型２，１の当接面に、ランナー部
３、ゲート部１８、製品部５を形成する板状キャビティ
６が形成されており、可動金型１内に、製品部５の一部
を形成し板状キャビティ６に突入可能にされた製品部を
構成する第１のパンチ７が摺動可能に組み込まれてい
る。又、固定側金型２内に、製品部５の一部を形成する
第２のパンチ４が摺動可能に組み込まれている。８はス
プルで、ランナー部３は板状キャビティ６とスプル８と
を連結する。なお、ゲート部１８は板状キヤビティ６の
樹脂流入口部分を示すものでランナー部３の単なる延長
部であってもよい。In FIG. 1, the mold includes a fixed mold 2 and a movable mold 1, and a runner portion 3, a gate portion 18, and a product portion 5 are formed on the contact surfaces of both molds 2 and 1. The plate-shaped cavity 6 is formed, and the first punch 7 forming a part of the product part 5 and forming the product part that can be inserted into the plate-shaped cavity 6 can slide in the movable mold 1. Built into. In addition, a second punch 4 forming a part of the product portion 5 is slidably incorporated in the stationary mold 2. Reference numeral 8 is a sprue, and the runner portion 3 connects the plate-shaped cavity 6 and the sprue 8. The gate portion 18 indicates the resin inlet portion of the plate-shaped cavity 6 and may be a simple extension of the runner portion 3.
【００２５】第１のパンチ７は、油圧サーボシリンダ９
によって微小振動、又はゆるやかな往復動がプログラム
制御選択できるようにされている。微小振動、又はゆる
やかな往復動を与えるサーボバルブ１２の代わりに高速
応答比例弁を使用してもよい。第２のパンチ４は、油圧
バイアスシリンダ１３に、支持されている。油圧バイア
スシリンダ１３は、固定金型２内に固定されており図示
しない装置により駆動され、第２のパンチ４は、第１の
パンチ７に対して流入溶解樹脂１４を介して保持／従
動、同期可能にされている。各シリンダ９，１３は各本
体１，２外に設けてもよい。製品抜きカス排出ピン、ス
プル排出ピン、１０、１１、は、エジェクタープレート
１５に一端を固定され、可動金型１を貫通する。The first punch 7 is a hydraulic servo cylinder 9
The micro vibration or the gentle reciprocating motion can be selected by the program control. A fast response proportional valve may be used in place of the servo valve 12 which gives minute vibration or gentle reciprocating motion. The second punch 4 is supported by the hydraulic bias cylinder 13. The hydraulic bias cylinder 13 is fixed in the fixed die 2 and is driven by a device (not shown), and the second punch 4 is held / driven by the inflow melting resin 14 with respect to the first punch 7 and is synchronized. Has been enabled. The cylinders 9 and 13 may be provided outside the main bodies 1 and 2. The product removal scrap discharge pins and the sprue discharge pins 10, 11 have one ends fixed to the ejector plate 15 and penetrate the movable mold 1.
【００２６】次に本発明の実施例の作用について述べる
と、図１において、流入溶解樹脂１４は、図示しない射
出成形機シリンダからスプル８、ランナー部３、ゲート
部１８を通って板状キャビティ６内に導入され、製品部
５が形成される。射出、保圧時、第１のパンチ７、第２
のパンチ４は、図３に示すような位置に油圧サーボシリ
ンダ９及び油圧バイアスシリンダ１３により保持されて
いる。流入溶解樹脂１４が板状キャビティ６に射出充填
中、又は射出充填後に、又は保圧過程中に、又は保圧完
了後冷却中に第１のパンチ７を図３で見て左右に振動を
加えながら強制的に右方へ移動させると、図４に示すよ
うに振動エネルギーによって第１のパンチ７と製品部５
との界面の樹脂は発熱軟化、又は固化が抑制されし第１
のパンチ７の形状が転写される。この場合、第２のパン
チ４は、図示の位置に油圧バイアスシリンダ１３により
保持されている。樹脂の軟化、転写工程はわずか数秒の
うちに完了する。特に、射出成形中の温度は一般に８０
〜１００℃であり、発熱軟化温度は１３０〜１４０℃と
いわれており、射出工程中の板状キャビティ６と製品部
５との温度差が小さいので、流動し易く、型冷却時等の
局部的な収縮も小さく、樹脂板の成形品は極めて均質と
なり、パンチの当接面の転写精度も高いものとなる。Next, the operation of the embodiment of the present invention will be described. In FIG. 1, the inflowing melted resin 14 passes through the sprue 8, the runner portion 3 and the gate portion 18 from the cylinder of the injection molding machine (not shown), and the plate-like cavity 6 is formed. Introduced therein, the product part 5 is formed. During injection and pressure holding, the first punch 7, the second
The punch 4 is held by the hydraulic servo cylinder 9 and the hydraulic bias cylinder 13 at the position shown in FIG. When the inflowing molten resin 14 is injected into the plate-shaped cavity 6, or after the injection-filling, during the pressure-holding process, or during the cooling after the pressure-holding is completed, the first punch 7 is vibrated to the left and right as viewed in FIG. However, when it is forcibly moved to the right, the first punch 7 and the product portion 5 are vibrated by the vibration energy as shown in FIG.
The resin at the interface with and is suppressed from softening or solidifying due to heat generation.
The shape of the punch 7 is transferred. In this case, the second punch 4 is held at the illustrated position by the hydraulic bias cylinder 13. The resin softening and transfer process is completed within just a few seconds. In particular, the temperature during injection molding is generally 80
It is said that the heat-softening temperature is 130 to 140 ° C., and the temperature difference between the plate-like cavity 6 and the product part 5 during the injection process is small, so that it easily flows and is locally applied during mold cooling. The shrinkage is small, the molded product of the resin plate is extremely uniform, and the transfer accuracy of the contact surface of the punch is high.
【００２７】さらに、油圧サーボシリンダ９により第１
のパンチ７を微小振動させ製品面に短時間だけ当接加圧
させることにより、転写性を増すことができる。この第
１のパンチ７の振動は緩やかな往復運動を短時間与える
ものであってもよい。この場合も、第２のパンチ４は、
図４の位置に油圧バイアスシリンダ１３により保持され
ている。Further, by the hydraulic servo cylinder 9, the first
By slightly vibrating the punch 7 and pressing the punch 7 against the surface of the product for a short time, the transferability can be increased. The vibration of the first punch 7 may give a gentle reciprocating motion for a short time. Also in this case, the second punch 4 is
It is held in the position shown in FIG. 4 by the hydraulic bias cylinder 13.
【００２８】さらに、第２のパンチ４は、第１のパンチ
７に対して流入溶解樹脂１４を介して従動、同期可能に
されている状態において、第１のパンチ７を図４で見て
左右に振動を加えると振動エネルギーによって製品部５
と板状キャビティ６との界面の樹脂は発熱し軟化する。
そして、図５に示すように製品部５界面の樹脂が軟化す
ると強制的に第１のパンチ７を変位させ製品部５を打ち
抜き加工する。樹脂の軟化、打ち抜き工程はわずか数秒
のうちに完了するので、従来の成形に比べて生産性を阻
害するものではない。Further, when the second punch 4 is driven and synchronized with the first punch 7 through the inflow melting resin 14, the first punch 7 can be seen from the left and right when viewed in FIG. When vibration is applied to the product part 5
The resin at the interface between and the plate-shaped cavity 6 generates heat and is softened.
Then, as shown in FIG. 5, when the resin on the interface of the product portion 5 is softened, the first punch 7 is forcibly displaced to punch the product portion 5. Since the softening and punching steps of the resin are completed within a few seconds, the productivity is not impaired as compared with the conventional molding.
【００２９】さらに、図５において、油圧サーボシリン
ダ９により第１のパンチ７を微小振動させながら、切断
された製品部側面に短時間だけ固定金型２の内周面１６
を当接させこすらせることにより、さらに製品部側面を
綺麗にすることができる。このパンチ７の振動は緩やか
な往復運動を短時間与えるものであってもよい。Further, referring to FIG. 5, the inner peripheral surface 16 of the fixed mold 2 is briefly attached to the side surface of the cut product portion while the first punch 7 is slightly vibrated by the hydraulic servo cylinder 9.
By abutting and rubbing against each other, the side surface of the product part can be further cleaned. The vibration of the punch 7 may give a gentle reciprocating motion for a short time.
【００３０】つぎに、図５において短時間だけ当接させ
た後、又は成形品が固化冷却された後、油圧サーボシリ
ンダ９により第１のパンチ７を移動させて製品部５を打
ち抜いた製品打ち抜きカス１７へ図６に示すようにイン
サートする。このようにすれば可動金型１が後退して型
を開いても、製品部が脱落したり固定金型側にのこるこ
となく、ランナー部３と製品部５が製品打ち抜きカス１
７にインサートされた状態で取り出せるので、通常の射
出成形と同様に射出成形品を取り扱うことができる。次
の型締め前に、パンチ７は、その位置をサーボシリンダ
９により元に戻し次成形に備えるようにしておく。Next, after abutting for a short time in FIG. 5, or after the molded product has been solidified and cooled, the first punch 7 is moved by the hydraulic servo cylinder 9 to punch the product portion 5, and the product is punched. Insert into the scrap 17 as shown in FIG. In this way, even if the movable mold 1 retracts and opens the mold, the runner part 3 and the product part 5 do not drop off the product part or reach the fixed mold side, and the product punching scrap 1
Since it can be taken out in the state of being inserted in 7, it is possible to handle an injection-molded product in the same manner as normal injection molding. Before the next die clamping, the punch 7 is returned to its original position by the servo cylinder 9 so as to be ready for the next molding.
【００３１】なお、板状キャビティ６から一部を取り出
して製品とするのではなく、板状キャビテキ６全体を含
んで製品とする場合には、打ち抜き工程を行わず、精度
の必要部分だけに振動を加えながら強制的にパンチを移
動させ圧力を加えることにより、転写性の向上のみに使
用し、高い精度の成形品を得ることも可能である。When the product is obtained by including the entire plate-shaped cavity 6 instead of taking out a part from the plate-shaped cavity 6 to form a product, the punching step is not performed and only the portion requiring precision is vibrated. By forcibly moving the punch and applying pressure while adding, it is possible to obtain a molded product with high accuracy by using it only for improving transferability.
【００３２】（実験例）図９に示すような、台部の高さ
ｈ＝２ｍｍ、直径Ｄ＝１０ｍｍ、レンズ部球面部４２の
半径５．６１４ｍｍ、の凸状のレンズ４１を材料アクリ
ペットＶＨ００１を用いて、本発明によって成形した。
射出時のパンチ７，４および板状キャビティ６の状態を
図１０に、圧縮、加圧、加圧保持時の状態を図１１に、
打ち抜き完了時の状態を図１２に示す。なお、前述した
部品と同様な部品は同符号を付し説明を省略する。ま
た、振動／圧縮／加圧等の状態を示す第１パンチの位置
をサイクル線図を図１３に示す。(Experimental Example) As shown in FIG. 9, a convex lens 41 having a base height h = 2 mm, a diameter D = 10 mm, and a radius of the lens spherical surface 42 of 5.614 mm was used as the material Acrypet VH001. Was molded according to the present invention.
The state of the punches 7 and 4 and the plate-like cavity 6 at the time of injection is shown in FIG. 10, and the state at the time of compression, pressurization and pressure holding is shown in FIG.
The state after completion of punching is shown in FIG. The same parts as those described above are designated by the same reference numerals and the description thereof will be omitted. Further, FIG. 13 shows a cycle diagram of the position of the first punch showing the states such as vibration / compression / pressurization.
【００３３】図１３に示すように、第１パンチ位置５１
は、図１０に示す位置で射出・保持される。このとき、
板状キャビティの厚みｔ＝２ｍｍ、製品の圧縮代ｄｔ＝
１．２ｍｍとした。また、射出・保持時間５２は約８秒
とした。次に圧縮工程５４で振動数２０Ｈｚ、振幅ａ＝
０．４ｍｍにて、０．５秒圧縮し図１１の状態とし、さ
らに加圧工程５５で２秒間振動圧縮・加圧をおこなっ
た。その後加圧保持工程５７で加圧保持を５．４秒おこ
なった。加圧保持後、打ち抜き工程５８で振動数２０Ｈ
ｚ、振幅ｂ＝０．６ｍｍで０．５秒で打ち抜きをおこな
い図１２の状態とした。このときの打ち抜き代はｓ＝３
ｍｍとした。仕上げ工程５９で図１２に示すように、固
定金型２の内周面１６にレンズ４１の外周面４３を２秒
間打ち抜き工程５８と同条件で振動を加えながら当接さ
せた。その後冷却し型を開放し製品４１取りだした。な
お、成形金型温度は約９０℃である。As shown in FIG. 13, the first punch position 51
Is ejected and held at the position shown in FIG. At this time,
Plate-shaped cavity thickness t = 2 mm, product compression allowance dt =
It was 1.2 mm. The injection / holding time 52 was set to about 8 seconds. Next, in the compression process 54, the frequency is 20 Hz and the amplitude a =
At 0.4 mm, it was compressed for 0.5 seconds to obtain the state of FIG. 11, and in the pressurizing step 55, vibration compression / pressurization was performed for 2 seconds. Thereafter, in the pressure holding step 57, pressure holding was performed for 5.4 seconds. After holding the pressure, the punching step 58 has a vibration frequency of 20H.
Z and amplitude b = 0.6 mm were punched out in 0.5 seconds to obtain the state of FIG. The punching margin at this time is s = 3
mm. In the finishing step 59, as shown in FIG. 12, the outer peripheral surface 43 of the lens 41 was brought into contact with the inner peripheral surface 16 of the fixed mold 2 for 2 seconds while applying vibration under the same conditions as in the punching step 58. Then, the mold was opened by cooling and the product 41 was taken out. The molding die temperature is about 90 ° C.
【００３４】射出サイクルは、通常１サイクル６０〜９
０秒であるが、本発明によれば、射出・保圧時間５２を
約８秒、冷却時間５３を約３５秒とし１サイクル約４５
秒とすることができた。さらに、球面精度はパンチのニ
ュートン本数＋４本以内、曲率は半径５．６１４±０．
０１以内であり、極めて精度の高いレンズを得ることが
できた。なお、射出圧力をあげると、球面精度がよくな
るが、厚み精度が低下する傾向がみられた。また、振動
を与えない場合の球面精度はかなり低下した。The injection cycle is usually 1 cycle 60 to 9
According to the present invention, the injection / holding time 52 is about 8 seconds, the cooling time 53 is about 35 seconds, and one cycle is about 45 seconds.
Could be seconds. Furthermore, the spherical accuracy is within +4 Newtons of the punch, and the curvature is a radius of 5.614 ± 0.
It was within 01, and an extremely accurate lens could be obtained. When the injection pressure was increased, the spherical surface accuracy improved, but the thickness accuracy tended to decrease. In addition, the spherical accuracy was considerably reduced when no vibration was applied.
【００３５】次に、本発明の他の実施例について述べ
る。図７乃至図８は、多数個取りの場合を示す実施例で
ある。図７は多数個取りの場合の金型内振動加工装置の
要部断面図を示し、図８は、多数個取りの場合の射出成
型後の成形品を可動金型側より見た説明図である。前述
した１個取りの場合と同様な構成部については同符号を
付し説明を省略する。図７において、複数の第１および
第２のパンチ７，４はそれぞれ連結部材３１，３２を介
して油圧サーボシリンダ９、油圧バイアスシリンダ１３
に連結され、第１の全パンチ及び第２の全パンチのがそ
れぞれ一体に動くようにされている。なお、サーボバル
ブ１２、油圧サーボシリンダ９、油圧バイアスシリンダ
１３、連結部材３１，３２等はパンチ力や取りつけの都
合上で幾つかのブロックに分配してもよい。Next, another embodiment of the present invention will be described. 7 to 8 show an embodiment showing a case where a large number of pieces are taken. FIG. 7 shows a cross-sectional view of a main part of a vibration machining device in a mold in the case of multi-cavity production, and FIG. 8 is an explanatory view of a molded product after injection molding in the case of multi-cavity viewed from the movable die side. is there. The same components as those in the case of the single-pickup described above are designated by the same reference numerals and the description thereof will be omitted. In FIG. 7, the plurality of first and second punches 7 and 4 are connected to the hydraulic servo cylinder 9 and the hydraulic bias cylinder 13 via connecting members 31 and 32, respectively.
, So that the first full punch and the second full punch move together. The servo valve 12, the hydraulic servo cylinder 9, the hydraulic bias cylinder 13, the connecting members 31 and 32, etc. may be distributed to several blocks for the convenience of punching force or mounting.
【００３６】図８に示すように製品部５はゲート部１８
および板状キャビティ６の周辺部６ａから離して設定さ
れるが、各製品部間５ａは樹脂の不足が生じない程度に
かなり近接して配置される。なお、各製品間の距離はさ
らに成形品の形状、精度、大きさ等によって適宜にきめ
られるのはいうまでもない。以上、実施例等においては
レンズの成形について述べたが、レンズ等の光学部品の
みならず、高精度を要求される小型精密歯車等の各種精
密機械部品についても適用できる。As shown in FIG. 8, the product section 5 includes a gate section 18
The distance between the product portions 5a is set so as to be far from the peripheral portion 6a of the plate-like cavity 6, but the product portions 5a are arranged so close to each other that a shortage of resin does not occur. Needless to say, the distance between each product can be appropriately determined depending on the shape, accuracy, size, etc. of the molded product. As described above, the molding of the lens has been described in the embodiments and the like, but the present invention can be applied not only to optical components such as lenses but also to various precision mechanical components such as small precision gears that require high precision.
【００３７】[0037]
【発明の効果】かかる構成によると、射出工程中に、板
状キャビティに注入された樹脂に製品部形状を有するパ
ンチで型開閉方向に微小振動、又は往復振動させ、振動
エネルギーによって射出成形工程中の樹脂を軟化圧縮さ
せて、形状を転写するので、極めて均質で内部歪もなく
転写精度の高い成形品を得ることができる。また、ゲー
ト部分や型周辺部を製品部分と距離をおいて成形が可能
となるので、ゲート部の残留歪等の影響がないきわめて
良好な製品を得ることができ、高精度、高品質のプラス
チック製品を提供するものとなった。According to such a construction, during the injection step, the resin injected into the plate-like cavity is vibrated in the mold opening / closing direction by a minute vibration or reciprocating vibration by a punch having a product portion shape, and the vibration energy is used during the injection molding step. Since the resin is softened and compressed to transfer the shape, it is possible to obtain a molded product which is extremely homogeneous and has no internal distortion and high transfer accuracy. In addition, since it is possible to mold the gate part and the peripheral part of the mold at a distance from the product part, it is possible to obtain a very good product that is not affected by residual strain in the gate part. The product is now offered.
【００３８】また、製品部分をゲート部と離せるので、
ゲート切断等の処理も製品部への影響がないので簡単に
おこなえる。さらに、製品部分を射出成型中に金型内で
分離するようにできるので、改めてゲート分離等の処理
は不要となる。また、製品打ち抜きカスとなった樹脂板
内に製品部を分離可能に再インサートできるので、後工
程での取り出し、検査等が簡単に行え、取扱が簡単にな
り、通常の射出成形と同様のラインで製作することも可
能となった。しかも、従来の射出時間中に製品の成型、
分離、切断が可能で成形サイクルも短く、高い射出圧力
や高精度の金型温度調整も不要となった。Since the product part can be separated from the gate part,
Processing such as gate cutting does not affect the product part, so it can be performed easily. Furthermore, since the product part can be separated in the mold during the injection molding, the process such as gate separation is not necessary again. In addition, since the product part can be re-inserted into the resin plate that has become punched out of the product in a separable manner, it can be easily taken out and inspected in the subsequent process, and handling is simple. It is also possible to make it with. Moreover, molding of the product during the conventional injection time,
Separation and cutting are possible, the molding cycle is short, and high injection pressure and highly accurate mold temperature adjustment are no longer required.
【００３９】また、多数個取りにあっては、従来のよう
な複雑なゲートやランナーを設ける必要がないので、ラ
ンナー部をそのままゲート部としてもよく、金型加工が
簡単になり、ランナー配列の問題もない。よって、高密
度の製品配置が可能であり、より量産に適したものを提
供するものとなった。Further, in the case of multi-cavity production, since it is not necessary to provide a complicated gate or runner as in the conventional case, the runner portion may be used as the gate portion as it is, the die machining becomes easy, and the runner arrangement is improved. There is no problem. Therefore, high-density product arrangement is possible, and a product more suitable for mass production is provided.
【図１】本発明の実施例に用いる金型内振動加工装置を
示す要部断面である。FIG. 1 is a cross-sectional view of essential parts showing an in-mold vibration machining device used in an example of the present invention.
【図２】本発明の一個取りの場合の成形品の説明図であ
る。FIG. 2 is an explanatory view of a molded product in the case of single picking of the present invention.
【図３】本発明の実施例に用いる金型内振動加工装置の
パンチ変位前のパンチ周辺の説明図である。FIG. 3 is an explanatory view of a punch and its periphery before displacement of the punch in the in-die vibration machining apparatus used in the embodiment of the present invention.
【図４】本発明の実施例に用いる金型内振動加工装置の
パンチ圧縮変位完了時のパンチ周辺の説明図である。FIG. 4 is an explanatory diagram of the punch periphery at the time of completion of punch compression displacement of the in-die vibration machining apparatus used in the embodiment of the present invention.
【図５】本発明の実施例に用いる金型内振動加工装置の
パンチ切断完了時のパンチ周辺の説明図である。FIG. 5 is an explanatory view of the periphery of the punch when the punch cutting is completed in the in-die vibration machining apparatus used in the embodiment of the present invention.
【図６】本発明の実施例に用いる金型内振動加工装置の
製品インサート時のパンチ周辺の説明図である。FIG. 6 is an explanatory diagram of the punch periphery at the time of product insertion of the in-die vibration machining apparatus used in the embodiment of the present invention.
【図７】本発明の多数個取りの場合の実施例に用いる金
型内振動加工装置を示す要部断面である。FIG. 7 is a cross-sectional view of an essential part showing a vibration processing apparatus in a mold used in an embodiment in the case of multi-cavity production of the present invention.
【図８】本発明の多数個取りの場合の成形品の説明図で
ある。FIG. 8 is an explanatory diagram of a molded product in the case of multi-cavity production of the present invention.
【図９】本発明の実験例で成形した製品部の形状・寸法
を示す説明図である。FIG. 9 is an explanatory view showing the shape and dimensions of the product part molded in the experimental example of the present invention.
【図１０】本発明の実験例の射出時のパンチおよびキャ
ビティの状態を示す説明図である。FIG. 10 is an explanatory diagram showing states of a punch and a cavity at the time of injection in an experimental example of the present invention.
【図１１】本発明の実験例の圧縮・加圧時のパンチおよ
びキャビティの状態を示す説明図である。FIG. 11 is an explanatory diagram showing states of a punch and a cavity during compression / pressurization in an experimental example of the present invention.
【図１２】本発明の実験例の打ち抜き・側面仕上げ時の
パンチおよびキャビティの状態を示す説明図である。FIG. 12 is an explanatory view showing the state of punches and cavities during punching and side surface finishing in an experimental example of the present invention.
【図１３】本発明の実験例の射出成形時のサイクル線図
である。FIG. 13 is a cycle diagram during injection molding of an experimental example of the present invention.
１ 可動金型 ２ 固定金型 ３ ランナー部 ４ 第２のパンチ ５ 製品部 ５ａ 製品部間 ６ 板状キャビティ（樹脂板） ６ａ 板状キャビティ（樹脂板）周辺部 ７ 第１のパンチ ８ スプル ９ 油圧サーボシリンダ １０ 製品抜きカス排出ピン １１ スプル排出ピン １２ サーボバルブ １３ 油圧バイアスシリンダ １４ 流入溶解樹脂 １５ エジェクタープレート １６ 固定金型内周面 １７ 製品打ち抜きカス １８ ゲート部 1 movable mold 2 fixed mold 3 runner part 4 second punch 5 product part 5a product part 6 plate-shaped cavity (resin plate) 6a plate-shaped cavity (resin plate) peripheral part 7 first punch 8 sprue 9 hydraulic pressure Servo cylinder 10 Product removal scrap discharge pin 11 Sprue discharge pin 12 Servo valve 13 Hydraulic bias cylinder 14 Inflow melting resin 15 Ejector plate 16 Fixed mold inner surface 17 Product punching scrap 18 Gate part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 八川 修一 富山県富山市石金20番地 株式会社不二越 内 (72)発明者 中村 行雄 埼玉県川口市西川口４丁目11番４号 日水 化工株式会社内 (72)発明者 米岡 典永 埼玉県川口市西川口４丁目11番４号 日水 化工株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shuichi Yagawa 20 Ishigane, Toyama City, Toyama Prefecture Fujikoshi Co., Ltd. (72) Inventor Yukio Nakamura 4-11-4 Nishikawaguchi, Kawaguchi City, Saitama Nichimizu Kako Co., Ltd. (72) Inventor Norinaga Yoneoka 4-11-4 Nishikawaguchi, Kawaguchi City, Saitama Prefecture Nissui Kako Co., Ltd.
Claims (8)
機において、固定金型または可動金型は板状のキャビテ
ィと板状キャビティに樹脂を注入するゲート部とを有し
ており、前記可動金型には板状キャビティに突入可能に
され突入方向に振動可能な第１のパンチと該第１のパン
チが摺動可能に挿入された金型内穴が設けられ、前記固
定金型には前記板状キャビティを挟んで第１のパンチと
対抗して第１のパンチと従動／同期可能な第２のパンチ
と該第２のパンチが摺動可能に挿入された金型内穴が設
けられており、少なくとも前記パンチの一方の突入面に
は製品成形形状部を有することを特徴とする金型内振動
加工装置。1. An injection molding machine having a fixed mold and a movable mold, wherein the fixed mold or the movable mold has a plate-shaped cavity and a gate portion for injecting resin into the plate-shaped cavity, The movable mold is provided with a first punch capable of plunging into the plate-shaped cavity and vibrating in the plunging direction, and a mold inner hole into which the first punch is slidably inserted, and the fixed mold. Includes a second punch that can be driven / synchronized with the first punch and opposes the first punch across the plate-like cavity, and a die inner hole into which the second punch is slidably inserted. An in-mold vibration machining apparatus, wherein at least one of the punching surfaces of the punch has a product molding shape portion.
ャビティに樹脂を注入するゲート部とは離れた位置に設
けられていることを特徴とする請求項１に記載の金形内
振動加工装置。2. The in-mold vibration according to claim 1, wherein the first and second punches are provided at positions apart from a gate portion for injecting resin into the plate-like cavity. Processing equipment.
ことを特徴とする請求項１または請求項２に記載の金形
内振動加工装置。3. The in-mold vibration machining apparatus according to claim 1 or 2, wherein the first and second punches are plural in number.
動加工装置において射出充填中、又は射出充填後のゲー
トシールが完了した後に、又は保圧過程中に、又は／及
び保圧完了後冷却中に、前記第１のパンチに微小振動を
与え、この振動エネルギーによって板状キャビティに充
填された樹脂板のパンチ近傍部を軟化し、又は固化を制
御し充分軟化した時点で前記第１のパンチを強制的に変
位させて圧縮を行うことを特徴とする金型内振動加工方
法。4. The in-mold vibration machining apparatus according to claim 1, 2 or 3, during injection filling, or after completion of gate sealing after injection filling, or during a pressure-holding process, and / or pressure-holding. During cooling after completion, a minute vibration is applied to the first punch, and the vibration energy softens the vicinity of the punch of the resin plate filled in the plate-like cavity, or the solidification is controlled to sufficiently soften the first plate. An in-die vibration machining method, characterized in that the punch No. 1 is forcibly displaced to perform compression.
に前記パンチに微小振動を与えながら製品の成形面に少
なくとも短時間だけ当接させた請求項４に記載の金型内
振動加工方法。5. The in-die vibration machining method according to claim 4, wherein after the punch is forcibly displaced, the punch is further brought into contact with the molding surface of the product for at least a short period of time while giving a slight vibration.
に前記第１の又は／及び第２のパンチに微小振動を与
え、この振動エネルギーによってパンチ近傍のプラスチ
ックを軟化し、充分軟化した時点で前記第１の又は／及
び第２のパンチを強制的に変位させ樹脂板より製品を打
ち抜くことを特徴とする請求項４または５に記載の金型
内振動加工方法。6. After forcibly displacing the punch, a minute vibration is further applied to the first or / and the second punch, and the vibration energy softens the plastic in the vicinity of the punch, and when the plastic is sufficiently softened. The in-mold vibration machining method according to claim 4 or 5, wherein the first or / and the second punch is forcibly displaced to punch a product from a resin plate.
打ち抜いた後さらに前記パンチに微小振動を与えながら
製品側面を前記いづれかの金型穴内周面に少なくとも短
時間だけ当接させることを特徴とする請求項４、５また
は６に記載の金型内振動加工方法。7. The punch is forcibly displaced to punch out a product, and then the side surface of the product is brought into contact with the inner peripheral surface of any one of the mold holes for at least a short time while applying a minute vibration to the punch. The in-mold vibration processing method according to claim 4, 5, or 6.
短時間当接後さらに前記パンチを強制的に変位させて製
品を打ち抜いた元の樹脂板へインサートしてスプル、ラ
ンナーと共に取り出すことを特徴とする請求項４、５、
６または７に記載の金型内振動加工方法。8. The sprue and runner are inserted together with the sprue and runner after the punch according to claim 7 is abutted against the inner peripheral surface of the die for a short time and the punch is forcibly displaced to insert the punched product into the original resin plate. 6. Taking out,
The vibration processing method in a die according to 6 or 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27121293A JP3350581B2 (en) | 1993-10-05 | 1993-10-05 | In-mold vibration processing method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27121293A JP3350581B2 (en) | 1993-10-05 | 1993-10-05 | In-mold vibration processing method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07100878A true JPH07100878A (en) | 1995-04-18 |
| JP3350581B2 JP3350581B2 (en) | 2002-11-25 |
Family
ID=17496915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27121293A Expired - Fee Related JP3350581B2 (en) | 1993-10-05 | 1993-10-05 | In-mold vibration processing method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3350581B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004009273A2 (en) * | 2002-07-19 | 2004-01-29 | Bühler AG | Moulding of a crystallisable material in the liquid or pasty state |
| EP1621315A1 (en) * | 2003-04-25 | 2006-02-01 | Hoya Corporation | Molding method and molding device utilizing ultrasonic vibration and optical lens |
| JP2006044119A (en) * | 2004-08-06 | 2006-02-16 | Nachi Fujikoshi Corp | Injection molding machine and injection molding method |
| JP2006142572A (en) * | 2004-11-17 | 2006-06-08 | Nachi Fujikoshi Corp | Injection molding machine and injection molding method |
| CN107310092A (en) * | 2017-05-26 | 2017-11-03 | 天津大学 | Polymer Melts in Complex shape face optics precision injection molding method and device |
-
1993
- 1993-10-05 JP JP27121293A patent/JP3350581B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004009273A2 (en) * | 2002-07-19 | 2004-01-29 | Bühler AG | Moulding of a crystallisable material in the liquid or pasty state |
| WO2004009273A3 (en) * | 2002-07-19 | 2004-03-18 | Buehler Ag | Moulding of a crystallisable material in the liquid or pasty state |
| EP1621315A1 (en) * | 2003-04-25 | 2006-02-01 | Hoya Corporation | Molding method and molding device utilizing ultrasonic vibration and optical lens |
| EP1621315A4 (en) * | 2003-04-25 | 2007-08-29 | Hoya Corp | Molding method and molding device utilizing ultrasonic vibration and optical lens |
| JP2006044119A (en) * | 2004-08-06 | 2006-02-16 | Nachi Fujikoshi Corp | Injection molding machine and injection molding method |
| JP4576504B2 (en) * | 2004-08-06 | 2010-11-10 | 株式会社不二越 | Injection molding machine and injection molding method |
| JP2006142572A (en) * | 2004-11-17 | 2006-06-08 | Nachi Fujikoshi Corp | Injection molding machine and injection molding method |
| JP4600980B2 (en) * | 2004-11-17 | 2010-12-22 | 株式会社不二越 | Injection molding machine and injection molding method |
| CN107310092A (en) * | 2017-05-26 | 2017-11-03 | 天津大学 | Polymer Melts in Complex shape face optics precision injection molding method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3350581B2 (en) | 2002-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5968439A (en) | Method for simultaneous injection and compression | |
| US5922266A (en) | Injection molding | |
| JP3515399B2 (en) | Molding method and molding die for molded article composed of three or more semi-molded articles | |
| JPH03244520A (en) | Vibrational finishing in mold | |
| US6645417B1 (en) | Gateless molding | |
| JP3350581B2 (en) | In-mold vibration processing method and apparatus | |
| US5069832A (en) | Degating method | |
| JP3366714B2 (en) | Injection molding apparatus and injection molding method using the apparatus | |
| JP3130099B2 (en) | Manufacturing method of plastic molded products | |
| JP2912083B2 (en) | Local pressurized injection molding machine | |
| JP3752160B2 (en) | Injection molding method of composite molded product and injection mold | |
| JP4600980B2 (en) | Injection molding machine and injection molding method | |
| JP4576504B2 (en) | Injection molding machine and injection molding method | |
| JP3179510B2 (en) | Injection molding method and apparatus | |
| JPH0929854A (en) | Resin lens, injection mold for molding the same lens and injection molding method therefor | |
| JP2003071874A (en) | Mold for injection-molding resin product having almost annular plate-shaped or almost disc-shaped thin-walled part and injection molding method | |
| JP3580560B2 (en) | Elastic compression molding method and elastic compression mold | |
| JP2842709B2 (en) | Manufacturing method of plastic molded products | |
| JPH0643082B2 (en) | Gate cutting method | |
| JPH08142145A (en) | Injection mold and injection compression molding method using the same | |
| JP2813083B2 (en) | Molding mold and method for producing plastic molded article | |
| JPH079106A (en) | Compression casting method | |
| JPS63145010A (en) | Injection mold | |
| JP3179139B2 (en) | Method for manufacturing resin molded products | |
| JP4574900B2 (en) | Plastic optical element injection molding method and injection mold |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20020903 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070913 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080913 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080913 Year of fee payment: 6 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080913 Year of fee payment: 6 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090913 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090913 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100913 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100913 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110913 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |