JPS61146516A - Manufacture of improved mold and insert molded product - Google Patents
Manufacture of improved mold and insert molded productInfo
- Publication number
- JPS61146516A JPS61146516A JP26878984A JP26878984A JPS61146516A JP S61146516 A JPS61146516 A JP S61146516A JP 26878984 A JP26878984 A JP 26878984A JP 26878984 A JP26878984 A JP 26878984A JP S61146516 A JPS61146516 A JP S61146516A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- cavity
- metal fitting
- molding
- molding material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000012778 molding material Substances 0.000 claims abstract description 27
- 239000010409 thin film Substances 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims description 34
- 229910052751 metal Inorganic materials 0.000 claims description 34
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 14
- 238000001721 transfer moulding Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 238000000465 moulding Methods 0.000 abstract description 17
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000001746 injection moulding Methods 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 235000011274 Benincasa cerifera Nutrition 0.000 description 1
- 235000015001 Cucumis melo var inodorus Nutrition 0.000 description 1
- 240000002495 Cucumis melo var. inodorus Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/02—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity
-
- 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、トランスファ成形において１合成高分子成形
材料を金ｒｉｇ金具と熱圧一体化成形する金型に関し１
％に超精密ゴム部品成形に好適な改善された金型及び該
金型を用いる高精度の金具−高分子成形材料一体化成形
品の製造方法に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a mold for integrally molding a synthetic polymer molding material with a gold rig fitting in transfer molding under heat and pressure.
%, it relates to an improved mold suitable for molding ultra-precision rubber parts, and a method for manufacturing a high-precision metal fitting-polymer molding material integrated molded product using the mold.
金属製金具と成形用材料とを熱圧一体化してなる光ピツ
クアップ用等の精密ゴム部品の製造方法が特公昭５５−
３１５２８号公報に開示されている。開示されたトラン
スファ成形技術は１回動ミラー装置の製造に関するもの
であるが、熱圧一体化する金ａＪＩｌ！金具は１両端を
開放して、内部に化合物供給ダクトが設けられ、その一
方の開放端より成形材料をプランジャーにより圧入して
金型キャビティに充填する方法を教えている。この方法
によれば、金具には必ず化合物供給ダクトを設ける必要
があり、・シかも強度が限定され、且つ製品の意匠性も
極めて限定されるので、その応用範囲が著しく制限され
、望ましいものではない。A method for manufacturing precision rubber parts for optical pickups, etc., which is made by integrating metal fittings and molding material under heat and pressure, was published in 1983.
It is disclosed in Japanese Patent No. 31528. The disclosed transfer molding technique is related to the manufacture of a single-turn mirror device, but the heat-pressure integrated gold aJIl! Both ends of the metal fitting are open, and a compound supply duct is provided inside, and a method is taught in which the molding material is press-fitted into the mold cavity from one open end using a plunger. According to this method, it is necessary to provide a compound supply duct in the metal fittings, and the strength is limited, and the design of the product is also extremely limited, so the range of application is severely limited and it is not desirable. do not have.
このような現状に茄えて、更に、：１ンバクトデイスク
（０−Ｄ）プレーヤー等の光ピツクアップに使用される
光学レンズ駆動保持用の超精密ゴム部品は１年々小型化
、精密化されており、最近では、金具と一体化した後の
製品サイズは、５〜１０ＩＩＩ以内和なってお冬瓜特に
成形後の仕上げ工数、たとえばゲート部仕上げ、パリ取
を】等の工数が膨大となり、また、金型の設計が複雑と
なるので、満足のいく寸法及び形状の精度が得られない
という欠点があり、これらの超精密ゴム部品用の金型−
強く望まれていた。In addition to this current situation, the ultra-precision rubber parts used to drive and hold the optical lenses used in optical pickups such as 1-unit disc (0-D) players are becoming smaller and more precise year by year. Recently, the product size after integration with the metal fittings has become within 5 to 10 mm, and the number of man-hours required for finishing winter melons after molding, such as finishing the gate and removing the edges, has become enormous. Since the design of the mold is complicated, it is difficult to obtain satisfactory dimensional and shape accuracy.
It was strongly desired.
従って１本発明の目的は、金層製金具と成形用材料とを
熱圧一体化してなる光ピツクアップ用等の精密ゴム部品
を効率よく高精度で成形し、且？成形後の仕上げが極め
て容易なトランスファ成形金型及びそれを用いる成形物
の効果的製造方法を提供するにある。Therefore, an object of the present invention is to efficiently mold precision rubber parts for optical pickups and the like with high precision by integrating a metal fitting made of a gold layer and a molding material under heat and pressure. It is an object of the present invention to provide a transfer molding die that allows extremely easy finishing after molding, and an effective method for producing molded products using the same.
本発明者らは、上記目的を達成すべく、主として金型に
関し多くの試作研究を行った結果２問題点？効果的に解
決し得る望ましい金型を見出した。In order to achieve the above object, the present inventors conducted a lot of trial production research mainly regarding molds, and found two problems as a result. We have found a desirable mold that can effectively solve the problem.
すなわち１本発明は、上型と下型とから成る金型のキャ
ビティに高分子成形材料を圧入するトランスファ成形用
金型において、下型のキャビティ凹部内にインサート用
金属製金具を装着する位置決め手段が形成され、上型に
形成された高分子成形材料の注入孔を装着金具の上端面
の中央部に向けて形成させると共に、該注入孔の開口下
端と該金具の上端面との間に材料溜空間部を形成させ。Specifically, the present invention provides a positioning means for mounting a metal fitting for an insert into a recessed part of the cavity of the lower mold in a transfer molding mold for press-fitting a polymer molding material into a cavity of the mold consisting of an upper mold and a lower mold. is formed, and the injection hole for the polymer molding material formed in the upper mold is formed toward the center of the upper end surface of the fitting, and the injection hole is formed between the opening lower end of the injection hole and the upper end surface of the fitting. A reservoir space is formed.
該金具の外周面に沿って成形材料を材料溜空間部からキ
ャビティに圧入しうる薄層状の間隙を形成させたことを
特徴とする金型及び該金型を用いて精度の優れた成形物
を製造する方法を提供する。A mold characterized in that a thin layer-like gap is formed along the outer peripheral surface of the metal fitting so that a molding material can be press-fitted from the material reservoir space into the cavity, and a molded product with excellent precision can be produced using the mold. Provides a method for manufacturing.
本発明における金型は、高分子成形材料を１例えば柱状
の金具と熱圧一体化成形するトランスファ成形金型であ
って、成形物の中央部に金具をインサート状に埋設一体
化させた成形物の製造に好適な・ものである。The mold according to the present invention is a transfer molding mold for integrally molding a polymer molding material with, for example, a pillar-shaped metal fitting under heat and pressure, and is a molded product in which the metal fitting is embedded and integrated in the center of the molded object in the form of an insert. It is suitable for manufacturing.
しかして、上型と下金が組合わされて形成され見
るキャビティにおいて、下型のその中央部に金具を所定
の位置に装着するための凹孔が形成され。Thus, in the cavity formed by combining the upper mold and the lower mold, a recessed hole for mounting a metal fitting in a predetermined position is formed in the center of the lower mold.
金具の下端部が嵌入固定される。一方、上型には。The lower end of the metal fitting is fitted and fixed. On the other hand, for the upper mold.
その外側上面部に設けられた成形材料室としてのポット
の中央部に、材料をキャピテイに圧入するための注入孔
（スプル）が形成されている。この注入孔はキャビティ
の中央部に装着された金具の上端面の中央部に向けて１
つだけ形成され、またその下方の金具の上面との間に一
時的に溶融成形材料を滞留させるように材料溜空間部が
形成されて、該注入孔はこの材料溜空間に開口している
。An injection hole (sprue) for press-fitting material into the cavity is formed in the center of the pot, which serves as a molding material chamber provided on the outer upper surface of the pot. This injection hole points toward the center of the upper end surface of the metal fitting installed in the center of the cavity.
A material reservoir space is formed between the molding member and the upper surface of the metal fitting below it so that the molten molding material is temporarily retained, and the injection hole opens into this material reservoir space.
更に、金具の外周部には、その外周面に沿って。Furthermore, on the outer circumferential part of the metal fittings, along the outer circumferential surface.
成形用キャビティまで全面的に僅かな間隙が形成され、
滞留材料はプランジャの押圧によりその薄層状間隙を通
って目的成形物用キャビティに圧入される。A small gap is formed all the way to the molding cavity,
The retained material is forced into the cavity for the desired molded product through the thin layer gap by the pressure of the plunger.
このような本発明の金型を用いてトランスファ成形する
ときは、複数の注入孔から成形材料を圧入成形する従来
法に比べて精度の高い成形品が得られ、また、金型を開
いて、取出された成形品を仕上げる際に、金具の上端部
に接合している材料 。When performing transfer molding using the mold of the present invention, a molded product with higher precision can be obtained compared to the conventional method of press-molding the molding material through multiple injection holes, and when the mold is opened, The material that is joined to the upper end of the metal fitting when finishing the removed molded product.
溜空間部の小塊を指でねじり取るとき、金具外周面の薄
膜と共に成形品から容易に取除くことができるので従来
法におけるゲート部の仕上げなど厄介な後処理工程が実
質的に省略でき、工業的に極めて有利である。When the small lump in the reservoir space is twisted with fingers, it can be easily removed from the molded product together with the thin film on the outer circumferential surface of the metal fitting, so the troublesome post-processing steps such as finishing the gate part in conventional methods can be substantially omitted. It is extremely advantageous industrially.
本発明の一実施例を示す添付図面の金型により。 By the mold of the attached drawing which shows one Example of this invention.
更に詳細に説明する。This will be explained in more detail.
第１図は、○−Ｄプレーヤーの光ピツクアップに使用さ
れる光学レンズ駆動保持用ゴム成形物のための本発明に
係る金型の縦断面図であり、第２図は、同成形物製造の
ための従来の金型の縦断面図である。FIG. 1 is a longitudinal sectional view of a mold according to the present invention for a rubber molded product for driving and holding an optical lens used for optical pickup of a ○-D player, and FIG. FIG. 2 is a longitudinal sectional view of a conventional mold for
図において、下型１と上型２は、ガイドビン３によって
所定の開閉が行われ、成形用キャビティ４の下型の中央
部の金具５を装着するための位置決め孔６に金具５の下
端部を嵌入装着したのち両型は閉じられる。上型にはそ
の外側上面に成形材料室７が形成され一通常予熱された
成形材料の所定量がそこに入れられる。本発明の金型は
第１図に示される如く、上型２の成形用キャビティ部の
中央部には、下型１に装着された金具の上端面の中央に
向けられた１個の材料注入孔８が形成され。In the figure, a lower mold 1 and an upper mold 2 are opened and closed in a predetermined manner by a guide bin 3, and the lower end of the metal fitting 5 is inserted into a positioning hole 6 for mounting the metal fitting 5 in the center of the lower mold in a molding cavity 4. After fitting and installing, both molds are closed. The upper mold has a molding material chamber 7 formed on its outer upper surface, into which a predetermined amount of usually preheated molding material is placed. As shown in FIG. 1, the mold of the present invention has one material injected in the center of the molding cavity of the upper mold 2 directed toward the center of the upper end surface of the metal fitting attached to the lower mold 1. A hole 8 is formed.
その下端は、金具５の上端面との間く形成された成形材
料溜空間９の上部中央に開口している。また、上型２に
は、更に成形用キャビティ４の上方に突出する金具部分
の外周面に沿って薄膜状の間隙１０が全周的に形成され
、一時的に滞留する溜空間９の溶融材料は、この間隙を
薄膜状で通過しキャビティ４に圧送充填される。この圧
入成形はプランジャ１１の押圧力によって行われる。Its lower end opens at the center of the upper part of a molding material reservoir space 9 formed between it and the upper end surface of the metal fitting 5. Further, in the upper die 2, a thin film-like gap 10 is formed all around the outer circumferential surface of the metal part that protrudes above the molding cavity 4, and the molten material in the reservoir space 9 temporarily remains therein. passes through this gap in the form of a thin film and is pumped and filled into the cavity 4. This press-fitting is performed by the pressing force of the plunger 11.
これに対し、第２図に示される従来法の例では。In contrast, in the example of the conventional method shown in FIG.
材料室７から成形材料をキャビティに圧入するための２
個の注入孔８’、 ８’ が設けられ、その下端は、
成形物用キャビティの上面に直接開口している。この金
型によるトランスファ成形では、ウェルドマークや金具
の僅かな移動とか傾きに注意しなければならないし、特
にキャビティ内に充填形成された成形物から注入孔のス
プルを分離した場合、成形物表面のその２個所の部分を
仕上げ加工しなければならない不利が避けられなかった
のである。2 for press-fitting the molding material from the material chamber 7 into the cavity.
injection holes 8', 8' are provided, the lower ends of which are
It opens directly into the upper surface of the molding cavity. In transfer molding using this mold, care must be taken against slight movement or inclination of weld marks and metal fittings. In particular, when separating the sprue of the injection hole from the molded product filled in the cavity, the surface of the molded product must be carefully checked. The disadvantage of having to finish these two parts was unavoidable.
本発明の金型は、上記のよ５に、上型に設けた注入孔を
下型に装着した金具の上端面のほぼ中央部分にしたこと
により、金具は常にプランジャーにより圧送される成形
用材料の注入圧力により下型に押しつけられるため成形
用材料の流れによる金具の移動が無いため製品の寸法及
び形状の精度があがるばか１）でなく、成形後のゲート
部仕上げ工程が不要になる。In the mold of the present invention, the injection hole provided in the upper mold is located approximately at the center of the upper end surface of the metal fitting attached to the lower mold, as described in 5 above. Since the metal fittings are pressed against the lower mold by the injection pressure of the material, there is no movement of the metal fittings due to the flow of the molding material, which not only improves the precision of the dimensions and shape of the product, but also eliminates the need for a gate finishing process after molding.
さらに、材料溜空間を注入孔の下型との当接面に設けた
ことによって、成形用材料が成形用キャビティ内に均一
に圧送されるため、成形収縮の部分的な変化が最小限に
とどめられ１寸法及び形状の精度が顕著に向上するとい
う効果がある。Furthermore, by providing a material reservoir space on the contact surface with the lower mold of the injection hole, the molding material is evenly pumped into the molding cavity, minimizing local changes in molding shrinkage. This has the effect of significantly improving the precision of dimensions and shape.
また、このような高精度の金型ではあるが注入孔σ）設
計が極めて簡易であるため、従来より使用されている標
準的なコンプレッション用成形金型にプランジャーの追
加と注入孔の追加形成を施す簡単な改造だけで使用でき
る利点があ（）、新たに金型を製作する必要がないとい
う実益がある。In addition, although the mold has such high precision, the injection hole σ) design is extremely simple, so it is necessary to add a plunger and form an additional injection hole to the standard compression mold that has been used for a long time. It has the advantage that it can be used with just a simple modification (), and there is a practical benefit that there is no need to create a new mold.
第１図は１本発明に係る金型の部分断面図で。
第２図は一従来の金型のそれである。
図中の符号：
１・・・下金型、 ２・・・上金型。
４・・・キャビティ、 ５・・・金具−８，８′ ・・
・注入孔、 ９・・・成形材料溜空間。
１０・・・間隙、 １１・・・プランジャー。FIG. 1 is a partial sectional view of a mold according to the present invention. FIG. 2 shows a conventional mold. Codes in the diagram: 1...Lower mold, 2...Upper mold. 4...Cavity, 5...Metal fittings-8, 8'...
- Injection hole, 9...molding material reservoir space. 10...Gap, 11...Plunger.
Claims (1)
形材料を圧入するトランスファ成形用金型において、下
型のキャビティ凹部内にインサート用金属製金具を装着
する位置決め手段が形成され、上型に形成された高分子
成形材料の注入孔を装着金具の上端面の中央部に向けて
形成させると共に、該注入孔の開口下端と該金具の上端
面との間に材料溜空間部を形成させ、該金具の外周面に
沿って成形材料を材料溜空間部からキャビティに圧入し
うる薄層状の間隙を形成させたことを特徴とする改良さ
れた金型。 ２、割金型の下型のキャビティ凹部内にインサート用金
属金具を装着する位置決め手段が形成され、上型に形成
された高分子成形材料の注入孔を装着金具の上端面の中
央部に向けて開口させると共に、該注入孔の開口下端と
該金具の上端面との間に材料溜空間部を形成させ、該金
具の外周面に沿って該空間部の成形材料を薄膜状にキャ
ビティに圧入しうる間隙を形成させたトランスファ成形
用金型を用い、下型に金具を装着して金型を閉じたのち
、上型のポット内の予熱された成形材料をプランジャに
より金型内に圧入し、型を開いて取出した成形物の上端
面側の被覆状材料を除去することを特徴とするインサー
ト成形物の製造方法。[Claims] 1. In a transfer molding mold in which a polymer molding material is press-fitted into a cavity of a mold consisting of an upper mold and a lower mold, a metal fitting for insert is installed in the cavity recess of the lower mold. A positioning means is formed to direct the injection hole of the polymer molding material formed in the upper mold toward the center of the upper end surface of the mounting fitting, and to form the injection hole between the opening lower end of the injection hole and the upper end surface of the fitting. An improved mold characterized in that a material reservoir space is formed in the metal fitting, and a thin layer-like gap is formed along the outer circumferential surface of the metal fitting so that the molding material can be press-fitted from the material reservoir space into the cavity. 2. A positioning means for mounting the metal fitting for the insert is formed in the cavity recess of the lower mold of the split mold, and the injection hole for the polymer molding material formed in the upper mold is directed toward the center of the upper end surface of the fitting. At the same time, a material reservoir space is formed between the opening lower end of the injection hole and the upper end surface of the metal fitting, and the molding material in the space is press-fitted into the cavity in a thin film along the outer peripheral surface of the metal fitting. Using a transfer molding mold that has a gap that allows for the transfer molding, a metal fitting is attached to the lower mold and the mold is closed, and then the preheated molding material in the pot of the upper mold is press-fitted into the mold using a plunger. . A method for manufacturing an insert molded article, which comprises removing a covering material on the upper end surface side of the molded article taken out by opening the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26878984A JPS61146516A (en) | 1984-12-20 | 1984-12-20 | Manufacture of improved mold and insert molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26878984A JPS61146516A (en) | 1984-12-20 | 1984-12-20 | Manufacture of improved mold and insert molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61146516A true JPS61146516A (en) | 1986-07-04 |
Family
ID=17463296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26878984A Pending JPS61146516A (en) | 1984-12-20 | 1984-12-20 | Manufacture of improved mold and insert molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61146516A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0329907A1 (en) * | 1988-02-26 | 1989-08-30 | Motor Wheel Corporation | Method and apparatus for molding composite metal-elastomer wheels |
| JPH03116913U (en) * | 1990-03-15 | 1991-12-03 |
-
1984
- 1984-12-20 JP JP26878984A patent/JPS61146516A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0329907A1 (en) * | 1988-02-26 | 1989-08-30 | Motor Wheel Corporation | Method and apparatus for molding composite metal-elastomer wheels |
| JPH03116913U (en) * | 1990-03-15 | 1991-12-03 |
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