JPS5878734A - Molding method for molded article made of synthetic resin and device therefor - Google Patents
Molding method for molded article made of synthetic resin and device thereforInfo
- Publication number
- JPS5878734A JPS5878734A JP17609781A JP17609781A JPS5878734A JP S5878734 A JPS5878734 A JP S5878734A JP 17609781 A JP17609781 A JP 17609781A JP 17609781 A JP17609781 A JP 17609781A JP S5878734 A JPS5878734 A JP S5878734A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molded article
- cavity
- concave
- molded product
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は合成！＃４脂、Ｉｌ！成形品の成形方法および
その装ｆｌｌｌＫ関する本のである。[Detailed Description of the Invention] The present invention is a synthesis! #4 Fat, Il! This is a book about molding methods for molded products and their packaging.
従来のこの槽の装置では、固定金型に凹型が、可動金型
に凸型が形成してあり、両全型の分離の際には成形品は
可動金型の凸型に旬漕して移動し、その後凸型側に投げ
である突出しビンなどによって離型するものである。こ
のためＶＣたとえば断面コ字状の成形品の外周面に梨地
面を形成する定めに固定金型の凹型の内局壁面に梨地形
成用の凹凸面を形成しておいても、両金型の分離の際に
成形品の外周壁面と凹型の内８１面とがこすｎて、すシ
傷が生じてし１う欠点があっｔｏこのすり傷の発生を防
ぐｔめＫは成形品の外興餐は抜勾配を有する形状とし、
両金型の分離の際にこすｎない工うにしなけｎばならな
い。したがって可動金型の移動方向に平行な外ｌｉ！壁
をもつ断面コ字状の成形品の外局壁面に、梨地を無傷て
形成することは不可能であつ念〜。In conventional equipment for this tank, a concave mold is formed in the fixed mold and a convex mold is formed in the movable mold, and when the two molds are separated, the molded product is placed in the convex mold of the movable mold. The mold is moved and then released from the mold using a protruding bottle or the like that is thrown to the convex side. For this reason, even if an uneven surface for forming a satin finish is formed on the inner wall surface of the concave mold of the fixed mold in order to form a satin finish on the outer peripheral surface of a molded product having a U-shaped cross section, for example, VC During separation, the outer circumferential wall surface of the molded product and the inner surface of the concave mold rub against each other, resulting in scratches. The dining area has a draft shape,
Care must be taken to avoid rubbing when separating the two molds. Therefore, the outer li! parallel to the direction of movement of the movable mold! It is impossible to form a satin finish on the outer wall surface of a molded product with a U-shaped cross section without damage.
不発明によｆＬは断面コ字状の合成樹脂製成形品の外周
壁面に、梨地を無傷で形成可能な成形方法およびその装
ｆｊＩＩを傍供する本のである。According to the invention, fL is a book that provides a molding method that can form a satin finish without damage on the outer peripheral wall surface of a synthetic resin molded product having a U-shaped cross section, and its equipment fjII.
図面を参照して不発明にかかる成形装官の一実施例を説
明し、ついで成形方法について説明する。An embodiment of the molding equipment according to the invention will be described with reference to the drawings, and then a molding method will be described.
本実施例では時計などの前枠を成形品Ａとする取形装雪
を示している。分離＠Ｌ−Ｌにおいて対接する分離Ｉｆ
１１ａ、２ａｔｌ！する固定金型１および可動金型２の
いずｎか一方（本例においては固定金ｆｆ１ｌｌ）に凸
型３が形成してあり、他方（本例においては可動金型２
）に凹型Ａが形成してあり、凸型３と凹型４との間にキ
ャビティ５が形成さ１ている。固定金型１および可動金
型２ＫＦｉカイトピン６・・・・・・・・・が貫通して
シフ、可動金ｆｆｌ！２はこのガイドピンに沿って進退
可能である。キャビティ５＃：ｔはぼ断面コ字状をなし
ており、この沈めに成形品ムの外周壁は可動金形の移動
方向に平行に形成さｎるものである。凹ｆｆｌ！４の内
ｍ壁面には梨地形成用の凹凸面４ａが形５又しである。In this example, a molded article A is used as a front frame of a watch or the like. Separation @ Opposing separation If in L-L
11a, 2atl! A convex mold 3 is formed on one of the fixed mold 1 and the movable mold 2 (in this example, the fixed mold ff1ll), and the convex mold 3 is formed on the other (in this example, the movable mold 2).
) is formed with a concave mold A, and a cavity 5 is formed between the convex mold 3 and the concave mold 4. Fixed mold 1 and movable mold 2 KFi kite pin 6...... pass through and shift, movable mold ffl! 2 can move forward and backward along this guide pin. Cavity 5#:t has a substantially U-shaped cross section, and the outer circumferential wall of the molded product is sunk in parallel to the moving direction of the movable mold. Concaveffl! The inner wall surface of 4 has an uneven surface 4a in the shape of 5 or 5 for forming a satin finish.
固だ金型１にはキャビティ５に向って塔錦プラスチック
の注入孔７が形成しである。可動金型２の凹型４の外側
に、分離面２ａに向ってスプルー引抜き手段８７％設け
である。すなわち注入孔７に可動金型２を貫通する突出
しピン９の先端が対向しており、このピンの先端面は分
Ｓ面２ａかられずかに引込んで逆テーパーの孔１０が形
す又しである。また凹型４の底面４ｂは可動金型２を貫
通する突出しピン１１の先端面で構成しである。突出し
ピン９および１１はガイドビン６・・・・・・・・・に
貫通している突出し板１２に連結してあり、ガイドビン
に沿って進退可能である。１３は突出し板１２の戻しバ
ネであり、ガイドビン６・・・・・・・・・に巻回して
いる。なお突出しピン１１には周知の圧縮空気吹出し用
の孔（図示せず。ンを設けて成形品の離型を容易にして
いる。なお可動金型２お工び突出し板１２の駆動手段は
周知のものであるので図示を省略している。The solid mold 1 has an injection hole 7 for injection of Tonishiki plastic toward the cavity 5. A sprue extraction means 87% is provided on the outside of the concave mold 4 of the movable mold 2 toward the separation surface 2a. That is, the tip of a protruding pin 9 that passes through the movable mold 2 faces the injection hole 7, and the tip of the pin is gently retracted from the S surface 2a to form a reversely tapered hole 10. be. Further, the bottom surface 4b of the concave mold 4 is constituted by the tip end surface of the ejecting pin 11 passing through the movable mold 2. The protruding pins 9 and 11 are connected to a protruding plate 12 penetrating through the guide bins 6, and can move forward and backward along the guide bins. Reference numeral 13 denotes a return spring for the protruding plate 12, which is wound around the guide bin 6. The ejecting pin 11 is provided with a well-known hole (not shown) for blowing out compressed air to facilitate release of the molded product.The means for driving the movable mold 2 and the ejecting plate 12 is well-known. Since this is the same as above, illustration is omitted.
そこで合５！ｔＷＲ唸表取形品を成形するには、第１図
示のように可動金型２を突出し板１２とともに前進させ
、分離Ｉｔ！ｎ２ａを固定金型１の分離面１ａに対接さ
せ、キャピテイ５を形成する。ついで注入孔７から溶融
プラスチックをキャビティ５内に充てんし、こｆ’Ｌを
固化する。ついで第２図示のように可動金型２および突
出し板１２を後退寧せると、キャビティ５内で固化しｔ
成形品Ａは、逆テーパの孔１０にエリスプルーＢを注入
孔７から引抜き、成形品が凹型４に付滑した状態で凸型
５から分離する。この分離により成形品Ａの内部は中空
となり、さらに冷却することに工す若干中空内へ収縮し
、このｔめに凹型４の内Ｐｉ＠壁面の凹凸面４ａとの間
にわずかの空隙を生じる。内周壁面の凹凸面４ａＫよっ
て成形品Ａの外局壁面には梨地が形成さｎているが、上
記した空隙により、凹凸面と外周篭面とが離ＩＬること
になる。そこで突出し板１２を作動して突出しピン９お
よび１１′１に前進させるとともに圧縮空気を突出しピ
ン１１から、 −射４ると、成形品Ａは容易に凹型４か
ら離型する。このと＠Ｆｉ梨地金地金形成外ＷＩＪ壁面
と凹型の凹凸面とけ上記し念空隙があるためにこすする
ことがなく、梨地面が傷つげらＩＬることはない。成形
品Ａの離型後は突出し板１２は戻しバネ１３に工抄元位
１に戻る。That's a total of 5! To mold a tWR groin shaped product, move the movable mold 2 forward together with the protrusion plate 12 as shown in the first figure, and separate It! n2a is brought into contact with the separation surface 1a of the fixed mold 1 to form a cavity 5. Then, the cavity 5 is filled with molten plastic through the injection hole 7, and the plastic f'L is solidified. Then, as shown in the second figure, when the movable mold 2 and the protruding plate 12 are retreated, the mold solidifies in the cavity 5.
The molded product A is separated from the convex mold 5 by pulling out the Eris plue B from the injection hole 7 into the reverse tapered hole 10, and with the molded product sliding on the concave mold 4. Due to this separation, the inside of the molded product A becomes hollow, and when it is further cooled, it contracts slightly into the hollow, creating a slight gap between it and the inner surface Pi of the concave mold 4 and the uneven surface 4a of the wall surface. . A satin finish is formed on the outer wall surface of the molded product A due to the uneven surface 4aK of the inner circumferential wall surface, but the uneven surface and the outer circumferential basket surface are separated from each other by the above-mentioned voids. Then, when the ejector plate 12 is operated to advance the ejector pins 9 and 11'1 and compressed air is injected from the ejector pins 11, the molded product A is easily released from the concave mold 4. In this case, since there is a gap between the WIJ wall surface and the concave uneven surface outside the @Fi satin metal base metal formation, there is no rubbing, and the satin surface will not be damaged. After the molded product A is released from the mold, the protruding plate 12 is returned to the original position 1 by the return spring 13.
このように本発明の方法によ１げ、断面コ字状の合成樹
脂製成形品の外周清面に形成しｔ梨地を傷つけることな
く離型ができるので、美しい成形品が得らｎる。また不
発明の５４形装首は構成が簡単であり、確宴な動作で所
期の美しい成形品を成形で量る。As described above, according to the method of the present invention, a beautiful molded product can be obtained since it is possible to form a synthetic resin molded product having a U-shaped cross section on a clear surface and release the mold without damaging the satin finish. In addition, the uninvented 54-shaped headpiece is simple in construction, and can be molded into desired beautiful molded products with precise movements.
第１〜５図は不発明の装官の一実施例を示す断面図であ
り、第１図は固冗金型と可動金型とが対接位璽にあり、
側２図は可動金型が後退位置にあり、第５図は突出し板
が前進位官にある状態を示すものである。
１・・・固定金型・ ｌａ 、２ａ・・・分離面２・
・・可動金型 ３・・・凸型 ４・・・凹型５・・
・キャビテイ
４ａ・・・凹型の内周壁面をなす凹凸面４ｂ・・・凹型
の底面
８・・・スプルー引抜き手段
９・・・突出しピン １０・・・逆テーパーの孔１１
・・・突出しピン １２・・・突出し板Ａ・・・成形品
Ｂ・・・スプルー
以 上
特許出願へ 株式会社 精 工 舎
代理人 弁理士 最 上 務Figures 1 to 5 are cross-sectional views showing one embodiment of the uninvented equipment, and Figure 1 shows a fixed mold and a movable mold in opposing positions;
Side 2 shows the movable mold in the retracted position, and Fig. 5 shows the projecting plate in the forward position. 1...Fixed mold・la, 2a...separation surface 2・
...Movable mold 3...Convex mold 4...Concave mold 5...
・Cavity 4a...Uneven surface 4b forming a concave inner circumferential wall surface...Concave bottom surface 8...Sprue extraction means 9...Ejecting pin 10...Reverse tapered hole 11
...Ejecting pin 12...Ejecting plate A...Molded product B...Sprue and above To apply for patent Seikosha Co., Ltd. Agent Patent Attorney Mogami Tsumu
Claims (1)
ＩＬ九キャビティ内に溶融プラスチックを充てん固化し
、上記キャビティ内で成形さｆＬ定成形品を上記キャビ
ティを形成している凹形側に何１させて上記両金型を分
離し、上記凹型から成形品を離型することを特徴とする
合成樹脂製成形品の図形方法。 （２１対向する固定金型と可動金型とのいすｆＬか一方
に凸形が設けであるとともに、他力にこの凸型との間に
断面コ字状のキャビティを形ＦＭ、５Ｉ能の凹型が設け
てあり、この凹型の少なくとも内周壁面罠梨池形成用の
凹凸ｉｉ］が形成してあり、上配凹型側の金型の分離面
にスプルー引抜き手段が設けてあり、上記凹型の底面に
成形品の離型手段が設けであることを＃＋９とする合成
樹脂製成形品の成形装置。[Claims] Il+ Molten plastic is filled and solidified into an IL9 cavity formed between an opposing fixed mold and a movable mold, and an fL fixed molded product is molded within the cavity to form the cavity. A method for shaping a synthetic resin molded product, characterized in that the two molds are separated by doing something on the concave side of the mold, and the molded product is released from the concave mold. (21) A convex shape is provided on one side of the fixed mold and the movable mold that face each other, and a cavity with a U-shaped cross section is formed between the convex mold and the concave mold of the shape FM, 5I. At least the inner circumferential wall of this concave mold is formed with concavities and convexities ii for forming trap ponds, and a sprue extraction means is provided on the separation surface of the mold on the upper concave mold side, and A molding device for a synthetic resin molded product, characterized in that #+9 is provided with mold release means for the molded product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17609781A JPS5878734A (en) | 1981-11-02 | 1981-11-02 | Molding method for molded article made of synthetic resin and device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17609781A JPS5878734A (en) | 1981-11-02 | 1981-11-02 | Molding method for molded article made of synthetic resin and device therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5878734A true JPS5878734A (en) | 1983-05-12 |
Family
ID=16007637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17609781A Pending JPS5878734A (en) | 1981-11-02 | 1981-11-02 | Molding method for molded article made of synthetic resin and device therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5878734A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1504874A1 (en) * | 2003-08-06 | 2005-02-09 | Sumitomo Wiring Systems, Ltd. | A mold for injection molding and a method of operating a mold |
-
1981
- 1981-11-02 JP JP17609781A patent/JPS5878734A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1504874A1 (en) * | 2003-08-06 | 2005-02-09 | Sumitomo Wiring Systems, Ltd. | A mold for injection molding and a method of operating a mold |
| US7156649B2 (en) | 2003-08-06 | 2007-01-02 | Sumitomo Wiring Systems, Ltd. | Mold for injection molding and a method of operating a mold |
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